2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101547
	* sm-file.cc (file_leak::emit): Handle m_arg being NULL.
	(file_leak::describe_final_event): Handle ev.m_expr being NULL.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101522
	* store.cc (binding_cluster::purge_state_involving): Don't change
	m_map whilst iterating through it.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::handle_phi): Add "old_state"
	param and use it.
	(region_model::update_for_phis): Update so that all of the phi
	stmts are effectively handled simultaneously, rather than in
	order.
	* region-model.h (region_model::handle_phi): Add "old_state"
	param.
	* state-purge.cc (self_referential_phi_p): Replace with...
	(name_used_by_phis_p): ...this new function.
	(state_purge_per_ssa_name::process_point): Update to use the
	above, so that all phi stmts at a basic block are effectively
	considered simultaneously, and only consider the phi arguments for
	the pertinent in-edge.
	* supergraph.cc (cfg_superedge::get_phi_arg_idx): New.
	(cfg_superedge::get_phi_arg): Use the above.
	* supergraph.h (cfg_superedge::get_phi_arg_idx): New decl.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* state-purge.cc (state_purge_annotator::add_node_annotations):
	Rather than erroneously always using the NULL in-edge, determine
	each relevant in-edge, and print the appropriate data for each
	in-edge.  Use print_needed to print the data as comma-separated
	lists of SSA names.
	(print_vec_of_names): Add "within_table" param and use it.
	(state_purge_annotator::add_stmt_annotations): Factor out
	collation and printing code into...
	(state_purge_annotator::print_needed): ...this new function.
	* state-purge.h (state_purge_annotator::print_needed): New decl.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* program-point.cc (function_point::print): Show src BB index at
	BEFORE_SUPERNODE.

2021-07-21  David Malcolm  <dmalcolm@redhat.com>

	* svalue.cc (infix_p): New.
	(binop_svalue::dump_to_pp): Use it to print MIN_EXPR and MAX_EXPR
	in prefix form, rather than infix.

2021-07-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101503
	* constraint-manager.cc (constraint_manager::add_constraint): Use
	can_have_associated_state_p rather than testing for unknown.
	(constraint_manager::get_or_add_equiv_class): Likewise.
	* program-state.cc (sm_state_map::set_state): Likewise.
	(sm_state_map::impl_set_state): Add assertion.
	* region-model-manager.cc
	(region_model_manager::maybe_fold_unaryop): Handle poisoned
	values.
	(region_model_manager::maybe_fold_binop): Move handling of unknown
	values...
	(region_model_manager::get_or_create_binop): ...to here, and
	generalize to use can_have_associated_state_p.
	(region_model_manager::maybe_fold_sub_svalue): Use
	can_have_associated_state_p rather than testing for unknown.
	(region_model_manager::maybe_fold_repeated_svalue): Use unknown
	when the size or repeated value is "unknown"/"poisoned".
	* region-model.cc (region_model::purge_state_involving): Reject
	attempts to purge unknown/poisoned svalues, as these svalues
	should not have state associated with them.
	* svalue.cc (sub_svalue::sub_svalue): Assert that we're building
	on top of an svalue with can_have_associated_state_p.
	(repeated_svalue::repeated_svalue): Likewise.
	(bits_within_svalue::bits_within_svalue): Likewise.
	* svalue.h (svalue::can_have_associated_state_p): New.
	(unknown_svalue::can_have_associated_state_p): New.
	(poisoned_svalue::can_have_associated_state_p): New.
	(unaryop_svalue::unaryop_svalue): Assert that we're building on
	top of an svalue with can_have_associated_state_p.
	(binop_svalue::binop_svalue): Likewise.
	(widening_svalue::widening_svalue): Likewise.

2021-07-16  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (enum access_direction): New.
	* engine.cc (exploded_node::on_longjmp): Update for new param of
	get_store_value.
	* program-state.cc (program_state::prune_for_point): Likewise.
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	Replace call to check_for_writable_region with call to
	check_region_for_write.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strcpy): Likewise.
	* region-model-reachability.cc (reachable_regions::add): Update
	for new param of get_store_value.
	* region-model.cc (region_model::get_rvalue_1): Likewise, also for
	get_rvalue_for_bits.
	(region_model::get_store_value): Add ctxt param and use it to call
	check_region_for_read.
	(region_model::get_rvalue_for_bits): Add ctxt param and use it to
	call get_store_value.
	(region_model::check_region_access): New.
	(region_model::check_region_for_write): New.
	(region_model::check_region_for_read): New.
	(region_model::set_value): Update comment.  Replace call to
	check_for_writable_region with call to check_region_for_write.
	* region-model.h (region_model::get_rvalue_for_bits): Add ctxt
	param.
	(region_model::get_store_value): Add ctxt param.
	(region_model::check_region_access): New decl.
	(region_model::check_region_for_write): New decl.
	(region_model::check_region_for_read): New decl.
	* region.cc (region_model::copy_region): Update call to
	get_store_value.
	* svalue.cc (initial_svalue::implicitly_live_p): Likewise.

2021-07-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt_pre): Handle
	__analyzer_dump_state.
	* program-state.cc (extrinsic_state::get_sm_idx_by_name): New.
	(program_state::impl_call_analyzer_dump_state): New.
	* program-state.h (extrinsic_state::get_sm_idx_by_name): New decl.
	(program_state::impl_call_analyzer_dump_state): New decl.
	* region-model-impl-calls.cc
	(call_details::get_arg_string_literal): New.
	* region-model.h (call_details::get_arg_string_literal): New decl.

2021-07-16  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (program_state::detect_leaks): Simplify using
	svalue::maybe_get_region.
	* region-model-impl-calls.cc (region_model::impl_call_fgets): Likewise.
	(region_model::impl_call_fread): Likewise.
	(region_model::impl_call_free): Likewise.
	(region_model::impl_call_operator_delete): Likewise.
	* region-model.cc (selftest::test_stack_frames): Likewise.
	(selftest::test_state_merging): Likewise.
	* svalue.cc (svalue::maybe_get_region): New.
	* svalue.h (svalue::maybe_get_region): New decl.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* svalue.h (is_a_helper <placeholder_svalue *>::test): Make
	param and template param const.
	(is_a_helper <widening_svalue *>::test): Likewise.
	(is_a_helper <compound_svalue *>::test): Likewise.
	(is_a_helper <conjured_svalue *>::test): Likewise.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/95006
	PR analyzer/94713
	PR analyzer/94714
	* analyzer.cc (maybe_reconstruct_from_def_stmt): Split out
	GIMPLE_ASSIGN case into...
	(get_diagnostic_tree_for_gassign_1): New.
	(get_diagnostic_tree_for_gassign): New.
	* analyzer.h (get_diagnostic_tree_for_gassign): New decl.
	* analyzer.opt (Wanalyzer-write-to-string-literal): New.
	* constraint-manager.cc (class svalue_purger): New.
	(constraint_manager::purge_state_involving): New.
	* constraint-manager.h
	(constraint_manager::purge_state_involving): New.
	* diagnostic-manager.cc (saved_diagnostic::supercedes_p): New.
	(dedupe_winners::handle_interactions): New.
	(diagnostic_manager::emit_saved_diagnostics): Call it.
	* diagnostic-manager.h (saved_diagnostic::supercedes_p): New decl.
	* engine.cc (impl_region_model_context::warn): Convert return type
	to bool.  Return false if the diagnostic isn't saved.
	(impl_region_model_context::purge_state_involving): New.
	(impl_sm_context::get_state): Use NULL ctxt when querying old
	rvalue.
	(impl_sm_context::set_next_state): Use new sval when querying old
	state.
	(class dump_path_diagnostic): Move to region-model.cc
	(exploded_node::on_stmt): Move to on_stmt_pre and on_stmt_post.
	Remove call to purge_state_involving.
	(exploded_node::on_stmt_pre): New, based on the above.  Move most
	of it to region_model::on_stmt_pre.
	(exploded_node::on_stmt_post): Likewise, moving to
	region_model::on_stmt_post.
	(class stale_jmp_buf): Fix parent class to use curiously recurring
	template pattern.
	(feasibility_state::maybe_update_for_edge): Call on_call_pre and
	on_call_post on gcalls.
	* exploded-graph.h (impl_region_model_context::warn): Return bool.
	(impl_region_model_context::purge_state_involving): New decl.
	(exploded_node::on_stmt_pre): New decl.
	(exploded_node::on_stmt_post): New decl.
	* pending-diagnostic.h (pending_diagnostic::use_of_uninit_p): New.
	(pending_diagnostic::supercedes_p): New.
	* program-state.cc (sm_state_map::get_state): Inherit state for
	conjured_svalue as well as initial_svalue.
	(sm_state_map::purge_state_involving): Also support SK_CONJURED.
	* region-model-impl-calls.cc (call_details::get_uncertainty):
	Handle m_ctxt being NULL.
	(call_details::get_or_create_conjured_svalue): New.
	(region_model::impl_call_fgets): New.
	(region_model::impl_call_fread): New.
	* region-model-manager.cc
	(region_model_manager::get_or_create_initial_value): Return an
	uninitialized poisoned value for regions that can't have initial
	values.
	* region-model-reachability.cc
	(reachable_regions::mark_escaped_clusters): Handle ctxt being
	NULL.
	* region-model.cc (region_to_value_map::purge_state_involving): New.
	(poisoned_value_diagnostic::use_of_uninit_p): New.
	(poisoned_value_diagnostic::emit): Handle POISON_KIND_UNINIT.
	(poisoned_value_diagnostic::describe_final_event): Likewise.
	(region_model::check_for_poison): New.
	(region_model::on_assignment): Call it.
	(class dump_path_diagnostic): Move here from engine.cc.
	(region_model::on_stmt_pre): New, based on exploded_node::on_stmt.
	(region_model::on_call_pre): Move the setting of the LHS to a
	conjured svalue to before the checks for specific functions.
	Handle "fgets", "fgets_unlocked", and "fread".
	(region_model::purge_state_involving): New.
	(region_model::handle_unrecognized_call): Handle ctxt being NULL.
	(region_model::get_rvalue): Call check_for_poison.
	(selftest::test_stack_frames): Use NULL for context when getting
	uninitialized rvalue.
	(selftest::test_alloca): Likewise.
	* region-model.h (region_to_value_map::purge_state_involving): New
	decl.
	(call_details::get_or_create_conjured_svalue): New decl.
	(region_model::on_stmt_pre): New decl.
	(region_model::purge_state_involving): New decl.
	(region_model::impl_call_fgets): New decl.
	(region_model::impl_call_fread): New decl.
	(region_model::check_for_poison): New decl.
	(region_model_context::warn): Return bool.
	(region_model_context::purge_state_involving): New.
	(noop_region_model_context::warn): Return bool.
	(noop_region_model_context::purge_state_involving): New.
	(test_region_model_context:: warn): Return bool.
	* region.cc (region::get_memory_space): New.
	(region::can_have_initial_svalue_p): New.
	(region::involves_p): New.
	* region.h (enum memory_space): New.
	(region::get_memory_space): New decl.
	(region::can_have_initial_svalue_p): New decl.
	(region::involves_p): New decl.
	* sm-malloc.cc (use_after_free::supercedes_p): New.
	* store.cc (binding_cluster::purge_state_involving): New.
	(store::purge_state_involving): New.
	* store.h (class symbolic_binding): New forward decl.
	(binding_key::dyn_cast_symbolic_binding): New.
	(symbolic_binding::dyn_cast_symbolic_binding): New.
	(binding_cluster::purge_state_involving): New.
	(store::purge_state_involving): New.
	* svalue.cc (svalue::can_merge_p): Reject attempts to merge
	poisoned svalues with other svalues, so that we identify
	paths in which a variable is conditionally uninitialized.
	(involvement_visitor::visit_conjured_svalue): New.
	(svalue::involves_p): Also handle SK_CONJURED.
	(poison_kind_to_str): Handle POISON_KIND_UNINIT.
	(poisoned_svalue::maybe_fold_bits_within): New.
	* svalue.h (enum poison_kind): Add POISON_KIND_UNINIT.
	(poisoned_svalue::maybe_fold_bits_within): New decl.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (fdump-analyzer-exploded-paths): New.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Implement it.
	* engine.cc (exploded_path::dump_to_pp): Add ext_state param and
	use it to dump states if non-NULL.
	(exploded_path::dump): Likewise.
	(exploded_path::dump_to_file): New.
	* exploded-graph.h (exploded_path::dump_to_pp): Add ext_state
	param.
	(exploded_path::dump): Likewise.
	(exploded_path::dump): Likewise.
	(exploded_path::dump_to_file): New.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.cc (fixup_tree_for_diagnostic_1): Use DECL_DEBUG_EXPR
	if it's available.
	* engine.cc (readability): Likewise.

2021-07-15  David Malcolm  <dmalcolm@redhat.com>

	* state-purge.cc (self_referential_phi_p): New.
	(state_purge_per_ssa_name::process_point): Don't purge an SSA name
	at its def-stmt if the def-stmt is self-referential.

2021-07-07  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (null_assignment_sm_context::get_state):
	New overload.
	(null_assignment_sm_context::set_next_state): New overload.
	(null_assignment_sm_context::get_diagnostic_tree): New.
	* engine.cc (impl_sm_context::get_state): New overload.
	(impl_sm_context::set_next_state): New overload.
	(impl_sm_context::get_diagnostic_tree): New overload.
	(impl_region_model_context::on_condition): Convert params from
	tree to const svalue *.
	* exploded-graph.h (impl_region_model_context::on_condition):
	Likewise.
	* region-model.cc (region_model::on_call_pre): Move handling of
	internal calls to before checking for get_fndecl_for_call.
	(region_model::add_constraints_from_binop): New.
	(region_model::add_constraint): Split out into a new overload
	working on const svalue * rather than tree.  Call
	add_constraints_from_binop.  Drop call to
	add_any_constraints_from_ssa_def_stmt.
	(region_model::add_any_constraints_from_ssa_def_stmt): Delete.
	(region_model::add_any_constraints_from_gassign): Delete.
	(region_model::add_any_constraints_from_gcall): Delete.
	* region-model.h
	(region_model::add_any_constraints_from_ssa_def_stmt): Delete.
	(region_model::add_any_constraints_from_gassign): Delete.
	(region_model::add_any_constraints_from_gcall): Delete.
	(region_model::add_constraint): Add overload decl.
	(region_model::add_constraints_from_binop): New decl.
	(region_model_context::on_condition): Convert params from tree to
	const svalue *.
	(noop_region_model_context::on_condition): Likewise.
	* sm-file.cc (fileptr_state_machine::condition): Likewise.
	* sm-malloc.cc (malloc_state_machine::on_condition): Likewise.
	* sm-pattern-test.cc: Include tristate.h, selftest.h,
	analyzer/call-string.h, analyzer/program-point.h,
	analyzer/store.h, and analyzer/region-model.h.
	(pattern_test_state_machine::on_condition): Convert params from tree to
	const svalue *.
	* sm-sensitive.cc (sensitive_state_machine::on_condition): Delete.
	* sm-signal.cc (signal_state_machine::on_condition): Delete.
	* sm-taint.cc (taint_state_machine::on_condition): Convert params
	from tree to const svalue *.
	* sm.cc: Include tristate.h, selftest.h, analyzer/call-string.h,
	analyzer/program-point.h, analyzer/store.h, and
	analyzer/region-model.h.
	(any_pointer_p): Add overload taking const svalue *sval.
	* sm.h (any_pointer_p): Add overload taking const svalue *sval.
	(state_machine::on_condition): Convert params from tree to
	const svalue *.  Provide no-op default implementation.
	(sm_context::get_state): Add overload taking const svalue *sval.
	(sm_context::set_next_state): Likewise.
	(sm_context::on_transition): Likewise.
	(sm_context::get_diagnostic_tree): Likewise.
	* svalue.cc (svalue::all_zeroes_p): New.
	(constant_svalue::all_zeroes_p): New.
	(repeated_svalue::all_zeroes_p): Convert to vfunc.
	* svalue.h (svalue::all_zeroes_p): New decl.
	(constant_svalue::all_zeroes_p): New decl.
	(repeated_svalue::all_zeroes_p): Convert decl to vfunc.

2021-06-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/95006
	* analyzer.h (class repeated_svalue): New forward decl.
	(class bits_within_svalue): New forward decl.
	(class sized_region): New forward decl.
	(get_field_at_bit_offset): New forward decl.
	* engine.cc (exploded_graph::get_or_create_node): Validate the
	merged state.
	(exploded_graph::maybe_process_run_of_before_supernode_enodes):
	Validate the states at each stage.
	* program-state.cc (program_state::validate): Validate
	m_region_model.
	* region-model-impl-calls.cc (region_model::impl_call_memset):
	Replace special-case logic for handling constant sizes with
	a call to fill_region of a sized_region with the given fill value.
	* region-model-manager.cc (maybe_undo_optimize_bit_field_compare):
	Drop DK_direct.
	(region_model_manager::maybe_fold_sub_svalue):  Fold element-based
	subregions of an initial value into initial values of an element.
	Fold subvalues of repeated svalues.
	(region_model_manager::maybe_fold_repeated_svalue): New.
	(region_model_manager::get_or_create_repeated_svalue): New.
	(get_bit_range_for_field): New.
	(get_byte_range_for_field): New.
	(get_field_at_byte_range): New.
	(region_model_manager::maybe_fold_bits_within_svalue): New.
	(region_model_manager::get_or_create_bits_within): New.
	(region_model_manager::get_sized_region): New.
	(region_model_manager::log_stats): Update for addition of
	m_repeated_values_map, m_bits_within_values_map, and
	m_sized_regions.
	* region-model.cc (region_model::validate): New.
	(region_model::on_assignment): Drop enum binding_kind.
	(region_model::get_initial_value_for_global): Likewise.
	(region_model::get_rvalue_for_bits): Replace body with call to
	get_or_create_bits_within.
	(region_model::get_capacity): Handle RK_SIZED.
	(region_model::set_value): Drop enum binding_kind.
	(region_model::fill_region): New.
	(region_model::get_representative_path_var_1): Handle RK_SIZED.
	* region-model.h (visitor::visit_repeated_svalue): New.
	(visitor::visit_bits_within_svalue): New.
	(region_model_manager::get_or_create_repeated_svalue): New decl.
	(region_model_manager::get_or_create_bits_within): New decl.
	(region_model_manager::get_sized_region): New decl.
	(region_model_manager::maybe_fold_repeated_svalue): New decl.
	(region_model_manager::maybe_fold_bits_within_svalue): New decl.
	(region_model_manager::repeated_values_map_t): New typedef.
	(region_model_manager::m_repeated_values_map): New field.
	(region_model_manager::bits_within_values_map_t): New typedef.
	(region_model_manager::m_bits_within_values_map): New field.
	(region_model_manager::m_sized_regions): New field.
	(region_model::fill_region): New decl.
	* region.cc (region::get_base_region): Handle RK_SIZED.
	(region::base_region_p): Likewise.
	(region::get_byte_size_sval): New.
	(get_field_at_bit_offset): Make non-static.
	(region::calc_offset): Move implementation of cases to
	get_relative_concrete_offset vfunc implementations.  Handle
	RK_SIZED.
	(region::get_relative_concrete_offset): New.
	(decl_region::get_svalue_for_initializer): Drop enum binding_kind.
	(field_region::get_relative_concrete_offset): New, from
	region::calc_offset.
	(element_region::get_relative_concrete_offset): Likewise.
	(offset_region::get_relative_concrete_offset): Likewise.
	(sized_region::accept): New.
	(sized_region::dump_to_pp): New.
	(sized_region::get_byte_size): New.
	(sized_region::get_bit_size): New.
	* region.h (enum region_kind): Add RK_SIZED.
	(region::dyn_cast_sized_region): New.
	(region::get_byte_size): Make virtual.
	(region::get_bit_size): Likewise.
	(region::get_byte_size_sval): New decl.
	(region::get_relative_concrete_offset): New decl.
	(field_region::get_relative_concrete_offset): New decl.
	(element_region::get_relative_concrete_offset): Likewise.
	(offset_region::get_relative_concrete_offset): Likewise.
	(class sized_region): New.
	* store.cc (binding_kind_to_string): Delete.
	(binding_key::make): Drop enum binding_kind.
	(binding_key::dump_to_pp): Delete.
	(binding_key::cmp_ptrs): Drop enum binding_kind.
	(bit_range::contains_p): New.
	(byte_range::dump): New.
	(byte_range::contains_p): New.
	(byte_range::cmp): New.
	(concrete_binding::dump_to_pp): Drop enum binding_kind.
	(concrete_binding::cmp_ptr_ptr): Likewise.
	(symbolic_binding::dump_to_pp): Likewise.
	(symbolic_binding::cmp_ptr_ptr): Likewise.
	(binding_map::apply_ctor_val_to_range): Likewise.
	(binding_map::apply_ctor_pair_to_child_region): Likewise.
	(binding_map::get_overlapping_bindings): New.
	(binding_map::remove_overlapping_bindings): New.
	(binding_cluster::validate): New.
	(binding_cluster::bind): Drop enum binding_kind.
	(binding_cluster::bind_compound_sval): Likewise.
	(binding_cluster::purge_region): Likewise.
	(binding_cluster::zero_fill_region): Reimplement in terms of...
	(binding_cluster::fill_region): New.
	(binding_cluster::mark_region_as_unknown): Drop enum binding_kind.
	(binding_cluster::get_binding): Likewise.
	(binding_cluster::get_binding_recursive): Likewise.
	(binding_cluster::get_any_binding): Likewise.
	(binding_cluster::maybe_get_compound_binding): Reimplement.
	(binding_cluster::get_overlapping_bindings): Delete.
	(binding_cluster::remove_overlapping_bindings): Reimplement in
	terms of binding_map::remove_overlapping_bindings.
	(binding_cluster::can_merge_p): Update for removal of
	enum binding_kind.
	(binding_cluster::on_unknown_fncall): Drop enum binding_kind.
	(binding_cluster::maybe_get_simple_value): Likewise.
	(store_manager::get_concrete_binding): Likewise.
	(store_manager::get_symbolic_binding): Likewise.
	(store::validate): New.
	(store::set_value): Drop enum binding_kind.
	(store::zero_fill_region): Reimplement in terms of...
	(store::fill_region): New.
	(selftest::test_binding_key_overlap): Drop enum binding_kind.
	* store.h (enum binding_kind): Delete.
	(binding_kind_to_string): Delete decl.
	(binding_key::make): Drop enum binding_kind.
	(binding_key::dump_to_pp): Make pure virtual.
	(binding_key::get_kind): Delete.
	(binding_key::mark_deleted): Delete.
	(binding_key::mark_empty): Delete.
	(binding_key::is_deleted): Delete.
	(binding_key::is_empty): Delete.
	(binding_key::binding_key): Delete.
	(binding_key::impl_hash): Delete.
	(binding_key::impl_eq): Delete.
	(binding_key::m_kind): Delete.
	(bit_range::get_last_bit_offset): New.
	(bit_range::contains_p): New.
	(byte_range::contains_p): New.
	(byte_range::operator==): New.
	(byte_range::get_start_byte_offset): New.
	(byte_range::get_next_byte_offset): New.
	(byte_range::get_last_byte_offset): New.
	(byte_range::as_bit_range): New.
	(byte_range::cmp): New.
	(concrete_binding::concrete_binding): Drop enum binding_kind.
	(concrete_binding::hash): Likewise.
	(concrete_binding::operator==): Likewise.
	(concrete_binding::mark_deleted): New.
	(concrete_binding::mark_empty): New.
	(concrete_binding::is_deleted): New.
	(concrete_binding::is_empty): New.
	(default_hash_traits<ana::concrete_binding>::empty_zero_p): Make false.
	(symbolic_binding::symbolic_binding): Drop enum binding_kind.
	(symbolic_binding::hash): Likewise.
	(symbolic_binding::operator==): Likewise.
	(symbolic_binding::mark_deleted): New.
	(symbolic_binding::mark_empty): New.
	(symbolic_binding::is_deleted): New.
	(symbolic_binding::is_empty): New.
	(binding_map::remove_overlapping_bindings): New decl.
	(binding_map::get_overlapping_bindings): New decl.
	(binding_cluster::validate): New decl.
	(binding_cluster::bind): Drop enum binding_kind.
	(binding_cluster::fill_region): New decl.
	(binding_cluster::get_binding): Drop enum binding_kind.
	(binding_cluster::get_binding_recursive): Likewise.
	(binding_cluster::get_overlapping_bindings): Delete.
	(store::validate): New decl.
	(store::set_value): Drop enum binding_kind.
	(store::fill_region): New decl.
	(store_manager::get_concrete_binding): Drop enum binding_kind.
	(store_manager::get_symbolic_binding): Likewise.
	* svalue.cc (svalue::cmp_ptr): Handle SK_REPEATED and
	SK_BITS_WITHIN.
	(svalue::extract_bit_range): New.
	(svalue::maybe_fold_bits_within): New.
	(constant_svalue::maybe_fold_bits_within): New.
	(unknown_svalue::maybe_fold_bits_within): New.
	(unaryop_svalue::maybe_fold_bits_within): New.
	(repeated_svalue::repeated_svalue): New.
	(repeated_svalue::dump_to_pp): New.
	(repeated_svalue::accept): New.
	(repeated_svalue::all_zeroes_p): New.
	(repeated_svalue::maybe_fold_bits_within): New.
	(bits_within_svalue::bits_within_svalue): New.
	(bits_within_svalue::dump_to_pp): New.
	(bits_within_svalue::maybe_fold_bits_within): New.
	(bits_within_svalue::accept): New.
	(bits_within_svalue::implicitly_live_p): New.
	(compound_svalue::maybe_fold_bits_within): New.
	* svalue.h (enum svalue_kind): Add SK_REPEATED and SK_BITS_WITHIN.
	(svalue::dyn_cast_repeated_svalue): New.
	(svalue::dyn_cast_bits_within_svalue): New.
	(svalue::extract_bit_range): New decl.
	(svalue::maybe_fold_bits_within): New vfunc decl.
	(region_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(region_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<region_svalue::key_t>::empty_zero_p): Make false.
	(constant_svalue::maybe_fold_bits_within): New.
	(unknown_svalue::maybe_fold_bits_within): New.
	(poisoned_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(poisoned_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<poisoned_svalue::key_t>::empty_zero_p): Make
	false.
	(setjmp_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(setjmp_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<setjmp_svalue::key_t>::empty_zero_p): Make
	false.
	(unaryop_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(unaryop_svalue::key_t::is_empty): Likewise.
	(unaryop_svalue::maybe_fold_bits_within): New.
	(default_hash_traits<unaryop_svalue::key_t>::empty_zero_p): Make
	false.
	(binop_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(binop_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<binop_svalue::key_t>::empty_zero_p): Make
	false.
	(sub_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(sub_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<sub_svalue::key_t>::empty_zero_p): Make
	false.
	(class repeated_svalue): New.
	(is_a_helper <const repeated_svalue *>::test): New.
	(struct default_hash_traits<repeated_svalue::key_t>): New.
	(class bits_within_svalue): New.
	(is_a_helper <const bits_within_svalue *>::test): New.
	(struct default_hash_traits<bits_within_svalue::key_t>): New.
	(widening_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(widening_svalue::key_t::is_empty): Likewise.
	(default_hash_traits<widening_svalue::key_t>::empty_zero_p): Make
	false.
	(compound_svalue::key_t::mark_empty): Use 2 rather than NULL_TREE.
	(compound_svalue::key_t::is_empty): Likewise.
	(compound_svalue::maybe_fold_bits_within): New.
	(default_hash_traits<compound_svalue::key_t>::empty_zero_p): Make
	false.

2021-06-28  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (byte_offset_t): New typedef.
	* store.cc (bit_range::dump_to_pp): Dump as a byte range if
	possible.
	(bit_range::as_byte_range): New.
	(byte_range::dump_to_pp): New.
	* store.h (class byte_range): New forward decl.
	(struct bit_range): Add comment.
	(bit_range::as_byte_range): New decl.
	(struct byte_range): New.

2021-06-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/101143
	* region-model.cc (compat_types_p): New function.
	(region_model::create_region_for_heap_alloc): Convert assertion to
	an error check.
	(region_model::create_region_for_alloca): Likewise.

2021-06-18  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (binding_cluster::get_any_binding): Make symbolic reads
	from a cluster with concrete bindings return unknown.

2021-06-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model-manager.cc
	(region_model_manager::get_or_create_int_cst): New.
	(region_model_manager::maybe_undo_optimize_bit_field_compare): Use
	it to simplify away a local tree.
	* region-model.cc (region_model::on_setjmp): Likewise.
	(region_model::on_longjmp): Likewise.
	* region-model.h (region_model_manager::get_or_create_int_cst):
	New decl.
	* store.cc (binding_cluster::zero_fill_region): Use it to simplify
	away a local tree.

2021-06-18  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (class custom_event): Make abstract to allow for
	custom vfuncs, splitting existing implementation into...
	(class precanned_custom_event): New subclass.
	(custom_event::get_desc): Move to...
	(precanned_custom_event::get_desc): ...subclass.
	* checker-path.h (class custom_event): Make abstract to allow for
	custom vfuncs, splitting existing implementation into...
	(class precanned_custom_event): New subclass.
	* diagnostic-manager.cc (diagnostic_manager::add_events_for_eedge):
	Use precanned_custom_event.
	* engine.cc
	(stale_jmp_buf::maybe_add_custom_events_for_superedge): Likewise.
	* sm-signal.cc (signal_delivery_edge_info_t::add_events_to_path):
	Likewise.

2021-06-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99212
	PR analyzer/101082
	* engine.cc: Include "target.h".
	(impl_run_checkers): Log BITS_BIG_ENDIAN, BYTES_BIG_ENDIAN, and
	WORDS_BIG_ENDIAN.
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Move support for masking
	via ARG0 & CST into...
	(region_model_manager::maybe_undo_optimize_bit_field_compare):
	...this new function.  Flatten by converting from nested
	conditionals to a series of early return statements to reject
	failures.  Reject if type is not unsigned_char_type_node.
	Handle BYTES_BIG_ENDIAN when determining which bits are bound
	in the binding_map.
	* region-model.h
	(region_model_manager::maybe_undo_optimize_bit_field_compare):
	New decl.
	* store.cc (bit_range::dump): New function.
	* store.h (bit_range::dump): New decl.

2021-06-15  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt): Handle __analyzer_dump_capacity.
	(exploded_node::on_stmt): Drop m_sm_changes from on_stmt_flags.
	(state_change_requires_new_enode_p): New function...
	(exploded_graph::process_node): Call it, rather than querying
	flags.m_sm_changes, so that dynamic-extent differences can also
	trigger the splitting of nodes.
	* exploded-graph.h (struct on_stmt_flags): Drop field m_sm_changes.
	* program-state.cc (program_state::detect_leaks): Purge dead
	heap-allocated regions from dynamic extents.
	(selftest::test_program_state_1): Fix type of "size_in_bytes".
	(selftest::test_program_state_merging): Likewise.
	* region-model-impl-calls.cc
	(region_model::impl_call_analyzer_dump_capacity): New.
	(region_model::impl_call_free): Remove dynamic extents from the
	freed region.
	* region-model-reachability.h
	(reachable_regions::begin_mutable_base_regs): New.
	(reachable_regions::end_mutable_base_regs): New.
	* region-model.cc: Include "tree-object-size.h".
	(region_model::region_model): Support new field m_dynamic_extents.
	(region_model::operator=): Likewise.
	(region_model::operator==): Likewise.
	(region_model::dump_to_pp): Dump sizes of dynamic regions.
	(region_model::handle_unrecognized_call): Purge dynamic extents
	from any regions that have escaped mutably:.
	(region_model::get_capacity): New function.
	(region_model::add_constraint): Unset dynamic extents when a
	heap-allocated region's address is NULL.
	(region_model::unbind_region_and_descendents): Purge dynamic
	extents of unbound regions.
	(region_model::can_merge_with_p): Call
	m_dynamic_extents.can_merge_with_p.
	(region_model::create_region_for_heap_alloc): Assert that
	size_in_bytes's type is compatible with size_type_node.  Update
	for renaming of record_dynamic_extents to set_dynamic_extents.
	(region_model::create_region_for_alloca): Likewise.
	(region_model::record_dynamic_extents): Rename to...
	(region_model::set_dynamic_extents): ...this.  Assert that
	size_in_bytes's type is compatible with size_type_node.  Add it
	to the m_dynamic_extents map.
	(region_model::get_dynamic_extents): New.
	(region_model::unset_dynamic_extents): New.
	(selftest::test_state_merging): Fix type of "size".
	(selftest::test_malloc_constraints): Likewise.
	(selftest::test_malloc): Verify dynamic extents.
	(selftest::test_alloca): Likewise.
	* region-model.h (region_to_value_map::is_empty): New.
	(region_model::dynamic_extents_t): New typedef.
	(region_model::impl_call_analyzer_dump_capacity): New decl.
	(region_model::get_dynamic_extents): New function.
	(region_model::get_dynamic_extents): New decl.
	(region_model::set_dynamic_extents): New decl.
	(region_model::unset_dynamic_extents): New decl.
	(region_model::get_capacity): New decl.
	(region_model::record_dynamic_extents): Rename to set_dynamic_extents.
	(region_model::m_dynamic_extents): New field.

2021-06-15  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_to_value_map::operator=): New.
	(region_to_value_map::operator==): New.
	(region_to_value_map::dump_to_pp): New.
	(region_to_value_map::dump): New.
	(region_to_value_map::can_merge_with_p): New.
	* region-model.h (class region_to_value_map): New class.

2021-06-13  Trevor Saunders  <tbsaunde@tbsaunde.org>

	* call-string.cc (call_string::call_string): Use range based for
	to iterate over vec<>.
	(call_string::to_json): Likewise.
	(call_string::hash): Likewise.
	(call_string::calc_recursion_depth): Likewise.
	* checker-path.cc (checker_path::fixup_locations): Likewise.
	* constraint-manager.cc (equiv_class::equiv_class): Likewise.
	(equiv_class::to_json): Likewise.
	(equiv_class::hash): Likewise.
	(constraint_manager::to_json): Likewise.
	* engine.cc (impl_region_model_context::on_svalue_leak):
	Likewise.
	(on_liveness_change): Likewise.
	(impl_region_model_context::on_unknown_change): Likewise.
	* program-state.cc (sm_state_map::set_state): Likewise.
	* region-model.cc (test_canonicalization_4): Likewise.

2021-06-11  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (worklist::key_t::cmp): Move sort by call_string to
	before SCC.

2021-06-09  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::get_lvalue_1): Make const.
	(region_model::get_lvalue): Likewise.
	(region_model::get_rvalue_1): Likewise.
	(region_model::get_rvalue): Likewise.
	(region_model::deref_rvalue): Likewise.
	(region_model::get_rvalue_for_bits): Likewise.
	* region-model.h (region_model::get_lvalue): Likewise.
	(region_model::get_rvalue): Likewise.
	(region_model::deref_rvalue): Likewise.
	(region_model::get_rvalue_for_bits): Likewise.
	(region_model::get_lvalue_1): Likewise.
	(region_model::get_rvalue_1): Likewise.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99212
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Add support for folding
	BIT_AND_EXPR of compound_svalue and a mask constant.
	* region-model.cc (region_model::get_rvalue_1): Implement
	BIT_FIELD_REF in terms of...
	(region_model::get_rvalue_for_bits): New function.
	* region-model.h (region_model::get_rvalue_for_bits): New decl.
	* store.cc (bit_range::from_mask): New function.
	(selftest::test_bit_range_intersects_p): New selftest.
	(selftest::assert_bit_range_from_mask_eq): New.
	(ASSERT_BIT_RANGE_FROM_MASK_EQ): New macro.
	(selftest::assert_no_bit_range_from_mask_eq): New.
	(ASSERT_NO_BIT_RANGE_FROM_MASK): New macro.
	(selftest::test_bit_range_from_mask): New selftest.
	(selftest::analyzer_store_cc_tests): Call the new selftests.
	* store.h (bit_range::intersects_p): New.
	(bit_range::from_mask): New decl.
	(concrete_binding::get_bit_range): New accessor.
	(store_manager::get_concrete_binding): New overload taking
	const bit_range &.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (int_size_in_bits): New decl.
	* region.cc (int_size_in_bits): New function.
	(region::get_bit_size): Reimplement in terms of the above.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (concrete_binding::dump_to_pp): Move bulk of
	implementation to...
	(bit_range::dump_to_pp): ...this new function.
	(bit_range::cmp): New.
	(concrete_binding::overlaps_p): Update for use of bit_range.
	(concrete_binding::cmp_ptr_ptr): Likewise.
	* store.h (struct bit_range): New.
	(class concrete_binding): Replace fields m_start_bit_offset and
	m_size_in_bits with new field m_bit_range.

2021-06-08  David Malcolm  <dmalcolm@redhat.com>

	* svalue.h (conjured_svalue::iterator_t): Delete.

2021-06-03  David Malcolm  <dmalcolm@redhat.com>

	* store.h (store::get_direct_binding): Remove unused decl.
	(store::get_default_binding): Likewise.

2021-06-03  David Malcolm  <dmalcolm@redhat.com>

	* svalue.cc (poisoned_svalue::dump_to_pp): Dump type.
	(compound_svalue::dump_to_pp): Dump any type.

2021-05-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/100615
	* sm-malloc.cc: Include "analyzer/function-set.h".
	(malloc_state_machine::on_stmt): Call unaffected_by_call_p and
	bail on the functions it recognizes.
	(malloc_state_machine::unaffected_by_call_p): New.

2021-05-10  Martin Liska  <mliska@suse.cz>

	* sm-file.cc (is_file_using_fn_p): Use startswith
	function instead of strncmp.

2021-05-10  Martin Liska  <mliska@suse.cz>

	* program-state.cc (program_state::operator=): Remove
	__cplusplus >= 201103.
	(program_state::program_state): Likewise.
	* program-state.h: Likewise.
	* region-model.h (class region_model): Remove dead code.

2021-04-24  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/100244
	* sm-malloc.cc (free_of_non_heap::describe_state_change):
	Bulletproof against change.m_expr being NULL.

2021-04-13  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98599
	* supergraph.cc (saved_uids::make_uid_unique): New.
	(saved_uids::restore_uids): New.
	(supergraph::supergraph): Replace assignments to stmt->uid with
	calls to m_stmt_uids.make_uid_unique.
	(supergraph::~supergraph): New.
	* supergraph.h (class saved_uids): New.
	(supergraph::~supergraph): New decl.
	(supergraph::m_stmt_uids): New field.

2021-04-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/100011
	* region-model.cc (region_model::on_assignment): Avoid NULL
	dereference if ctxt is NULL when assigning from a STRING_CST.

2021-04-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99042
	PR analyzer/99774
	* engine.cc
	(impl_region_model_context::impl_region_model_context): Add
	uncertainty param and use it to initialize m_uncertainty.
	(impl_region_model_context::get_uncertainty): New.
	(impl_sm_context::get_fndecl_for_call): Add NULL for new
	uncertainty param when constructing impl_region_model_context.
	(impl_sm_context::get_state): Likewise.
	(impl_sm_context::set_next_state): Likewise.
	(impl_sm_context::warn): Likewise.
	(exploded_node::on_stmt): Add uncertainty param
	and use it when constructing impl_region_model_context.
	(exploded_node::on_edge): Add uncertainty param and pass
	to on_edge call.
	(exploded_node::detect_leaks): Create uncertainty_t and pass to
	impl_region_model_context.
	(exploded_graph::get_or_create_node): Create uncertainty_t and
	pass to prune_for_point.
	(maybe_process_run_of_before_supernode_enodes): Create
	uncertainty_t and pass to impl_region_model_context.
	(exploded_graph::process_node): Create uncertainty_t instances and
	pass around as needed.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Add
	uncertainty param.
	(impl_region_model_context::get_uncertainty): New decl.
	(impl_region_model_context::m_uncertainty): New field.
	(exploded_node::on_stmt): Add uncertainty param.
	(exploded_node::on_edge): Likewise.
	* program-state.cc (sm_state_map::on_liveness_change): Get
	uncertainty from context and use it to unset sm-state from
	svalues as appropriate.
	(program_state::on_edge): Add uncertainty param and use it when
	constructing impl_region_model_context.  Fix indentation.
	(program_state::prune_for_point): Add uncertainty param and use it
	when constructing impl_region_model_context.
	(program_state::detect_leaks): Get any uncertainty from ctxt and
	use it to get maybe-live svalues for dest_state, rather than
	definitely-live ones; use this when determining which svalues
	have leaked.
	(selftest::test_program_state_merging): Create uncertainty_t and
	pass to impl_region_model_context.
	* program-state.h (program_state::on_edge): Add uncertainty param.
	(program_state::prune_for_point): Likewise.
	* region-model-impl-calls.cc (call_details::get_uncertainty): New.
	(region_model::impl_call_memcpy): Pass uncertainty to
	mark_region_as_unknown call.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strcpy): Likewise.
	* region-model-reachability.cc (reachable_regions::handle_sval):
	Also add sval to m_mutable_svals.
	* region-model.cc (region_model::on_assignment): Pass any
	uncertainty from ctxt to the store::set_value call.
	(region_model::handle_unrecognized_call): Get any uncertainty from
	ctxt and use it to record mutable svalues at the unknown call.
	(region_model::get_reachable_svalues): Add uncertainty param and
	use it to mark any maybe-bound svalues as being reachable.
	(region_model::set_value): Pass any uncertainty from ctxt to the
	store::set_value call.
	(region_model::mark_region_as_unknown): Add uncertainty param and
	pass it on to the store::mark_region_as_unknown call.
	(region_model::update_for_call_summary): Add uncertainty param and
	pass it on to the region_model::mark_region_as_unknown call.
	* region-model.h (call_details::get_uncertainty): New decl.
	(region_model::get_reachable_svalues): Add uncertainty param.
	(region_model::mark_region_as_unknown): Add uncertainty param.
	(region_model_context::get_uncertainty): New vfunc.
	(noop_region_model_context::get_uncertainty): New vfunc
	implementation.
	* store.cc (dump_svalue_set): New.
	(uncertainty_t::dump_to_pp): New.
	(uncertainty_t::dump): New.
	(binding_cluster::clobber_region): Pass NULL for uncertainty to
	remove_overlapping_bindings.
	(binding_cluster::mark_region_as_unknown): Add uncertainty param
	and pass it to remove_overlapping_bindings.
	(binding_cluster::remove_overlapping_bindings): Add uncertainty param.
	Use it to record any svalues that were in clobbered bindings.
	(store::set_value): Add uncertainty param.  Pass it to
	binding_cluster::mark_region_as_unknown when handling symbolic
	regions.
	(store::mark_region_as_unknown): Add uncertainty param and pass it
	to binding_cluster::mark_region_as_unknown.
	(store::remove_overlapping_bindings): Add uncertainty param and
	pass it to binding_cluster::remove_overlapping_bindings.
	* store.h (binding_cluster::mark_region_as_unknown): Add
	uncertainty param.
	(binding_cluster::remove_overlapping_bindings): Likewise.
	(store::set_value): Likewise.
	(store::mark_region_as_unknown): Likewise.

2021-04-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99906
	* analyzer.cc (maybe_reconstruct_from_def_stmt): Fix NULL
	dereference on calls with zero arguments.
	* sm-malloc.cc (malloc_state_machine::on_stmt): When handling
	__attribute__((nonnull)), only call get_diagnostic_tree if the
	result will be used.

2021-04-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99886
	* diagnostic-manager.cc
	(diagnostic_manager::prune_interproc_events): Use signed integers
	when subtracting one from path->num_events ().
	(diagnostic_manager::consolidate_conditions): Likewise.  Convert
	next_idx to a signed int.

2021-04-01  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (diagnostic_manager::add_diagnostic): Make
	enode param non-constant, and call add_diagnostic on it.  Add
	enode index to log message.
	(diagnostic_manager::add_diagnostic): Make enode param
	non-constant.
	* diagnostic-manager.h (diagnostic_manager::add_diagnostic):
	Likewise for both decls.
	* engine.cc
	(impl_region_model_context::impl_region_model_context): Likewise
	for enode_for_diag.
	(impl_sm_context::impl_sm_context): Likewise.
	(impl_sm_context::m_enode_for_diag): Likewise.
	(exploded_node::dump_dot): Don't pass the diagnostic manager
	to dump_saved_diagnostics.
	(exploded_node::dump_saved_diagnostics): Drop param.  Iterate
	directly through all saved diagnostics for the enode, rather
	than all saved diagnostics in the diagnostic_manager and
	filtering.
	(exploded_node::on_stmt): Make non-const.
	(exploded_node::on_edge): Likewise.
	(exploded_node::on_longjmp): Likewise.
	(exploded_node::detect_leaks): Likewise.
	(exploded_graph::get_or_create_node): Make enode_for_diag param
	non-const.
	(exploded_graph_annotator::print_enode): Iterate
	directly through all saved diagnostics for the enode, rather
	than all saved diagnostics in the diagnostic_manager and
	filtering.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Make
	enode_for_diag param non-constant.
	(impl_region_model_context::m_enode_for_diag): Likewise.
	(exploded_node::dump_saved_diagnostics): Drop param.
	(exploded_node::on_stmt): Make non-const.
	(exploded_node::on_edge): Likewise.
	(exploded_node::on_longjmp): Likewise.
	(exploded_node::detect_leaks): Likewise.
	(exploded_node::add_diagnostic): New.
	(exploded_node::get_num_diagnostics): New.
	(exploded_node::get_saved_diagnostic): New.
	(exploded_node::m_saved_diagnostics): New.
	(exploded_graph::get_or_create_node): Make enode_for_diag param
	non-constant.
	* feasible-graph.cc (feasible_node::dump_dot): Drop
	diagnostic_manager from call to dump_saved_diagnostics.
	* program-state.cc (program_state::on_edge): Convert enode param
	to non-const pointer.
	(program_state::prune_for_point): Likewise for enode_for_diag
	param.
	* program-state.h (program_state::on_edge): Convert enode param
	to non-const pointer.
	(program_state::prune_for_point): Likewise for enode_for_diag
	param.

2021-03-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99771
	* analyzer.cc (maybe_reconstruct_from_def_stmt): New.
	(fixup_tree_for_diagnostic_1): New.
	(fixup_tree_for_diagnostic): New.
	* analyzer.h (fixup_tree_for_diagnostic): New decl.
	* checker-path.cc (call_event::get_desc): Call
	fixup_tree_for_diagnostic and use it for the call_with_state call.
	(warning_event::get_desc): Likewise for the final_event and
	make_label_text calls.
	* engine.cc (impl_region_model_context::on_state_leak): Likewise
	for the on_leak and add_diagnostic calls.
	* region-model.cc (region_model::get_representative_tree):
	Likewise for the result.

2021-03-30  David Malcolm  <dmalcolm@redhat.com>

	* region.h (region::dump_to_pp): Remove old decl.

2021-03-30  David Malcolm  <dmalcolm@redhat.com>

	* sm-file.cc (fileptr_state_machine::on_stmt): Only call
	get_diagnostic_tree if the result will be used.
	* sm-malloc.cc (malloc_state_machine::on_stmt): Likewise.
	(malloc_state_machine::on_deallocator_call): Likewise.
	(malloc_state_machine::on_realloc_call): Likewise.
	(malloc_state_machine::on_realloc_call): Likewise.
	* sm-sensitive.cc
	(sensitive_state_machine::warn_for_any_exposure): Likewise.
	* sm-taint.cc (taint_state_machine::on_stmt): Likewise.

2021-03-25  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93695
	PR analyzer/99044
	PR analyzer/99716
	* engine.cc (exploded_node::on_stmt): Clear sm-state involving
	an SSA name at the def-stmt of that SSA name.
	* program-state.cc (sm_state_map::purge_state_involving): New.
	* program-state.h (sm_state_map::purge_state_involving): New decl.
	* region-model.cc (selftest::test_involves_p): New.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* svalue.cc (class involvement_visitor): New class
	(svalue::involves_p): New.
	* svalue.h (svalue::involves_p): New decl.

2021-03-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99614
	* diagnostic-manager.cc (class epath_finder): Add
	DISABLE_COPY_AND_ASSIGN.

2021-03-15  Martin Liska  <mliska@suse.cz>

	* sm-file.cc (get_file_using_fns): Add missing comma in initializer.

2021-03-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96374
	* analyzer.opt (-param=analyzer-max-infeasible-edges=): New param.
	(fdump-analyzer-feasibility): New flag.
	* diagnostic-manager.cc: Include "analyzer/trimmed-graph.h" and
	"analyzer/feasible-graph.h".
	(epath_finder::epath_finder): Convert m_sep to a pointer and
	only create it if !flag_analyzer_feasibility.
	(epath_finder::~epath_finder): New.
	(epath_finder::m_sep): Convert to a pointer.
	(epath_finder::get_best_epath): Add param "diag_idx" and use it
	when logging.  Rather than finding the shortest path and then
	checking feasibility, instead use explore_feasible_paths unless
	!flag_analyzer_feasibility, in which case simply use the shortest
	path, and note if it is infeasible.  Update for m_sep becoming a
	pointer.
	(class feasible_worklist): New.
	(epath_finder::explore_feasible_paths): New.
	(epath_finder::process_worklist_item): New.
	(class dump_eg_with_shortest_path): New.
	(epath_finder::dump_trimmed_graph): New.
	(epath_finder::dump_feasible_graph): New.
	(saved_diagnostic::saved_diagnostic): Add "idx" param, using it
	on new field m_idx.
	(saved_diagnostic::to_json): Dump m_idx.
	(saved_diagnostic::calc_best_epath): Pass m_idx to get_best_epath.
	Remove assertion that m_problem was set when m_best_epath is NULL.
	(diagnostic_manager::add_diagnostic): Pass an index when created
	saved_diagnostic instances.
	* diagnostic-manager.h (saved_diagnostic::saved_diagnostic): Add
	"idx" param.
	(saved_diagnostic::get_index): New accessor.
	(saved_diagnostic::m_idx): New field.
	* engine.cc (exploded_node::dump_dot): Call args.dump_extra_info.
	Move code to...
	(exploded_node::dump_processed_stmts): ...this new function and...
	(exploded_node::dump_saved_diagnostics): ...this new function.
	Add index of each diagnostic.
	(exploded_edge::dump_dot):  Move bulk of code to...
	(exploded_edge::dump_dot_label): ...this new function.
	* exploded-graph.h (eg_traits::dump_args_t::dump_extra_info): New
	vfunc.
	(exploded_node::dump_processed_stmts): New decl.
	(exploded_node::dump_saved_diagnostics): New decl.
	(exploded_edge::dump_dot_label): New decl.
	* feasible-graph.cc: New file.
	* feasible-graph.h: New file.
	* trimmed-graph.cc: New file.
	* trimmed-graph.h: New file.

2021-03-11  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (epath_finder::epath_finder):
	Update shortest_paths init for new param.

2021-03-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96374
	* engine.cc (exploded_path::feasible_p): Move "snodes_visited" and
	"model" locals into a new class feasibility_state.  Move heart
	of per-edge processing into
	feasibility_state::maybe_update_for_edge.
	(feasibility_state::feasibility_state): New.
	(feasibility_state::maybe_update_for_edge): New, based on loop
	body in exploded_path::feasible_p.
	* exploded-graph.h (class feasibility_state): New.

2021-03-10  David Malcolm  <dmalcolm@redhat.com>

	* supergraph.h
	(callgraph_superedge::dyn_cast_callgraph_superedge): New.
	(call_superedge::dyn_cast_callgraph_superedge): Delete.
	(return_superedge::dyn_cast_callgraph_superedge): Delete.

2021-03-02  Martin Liska  <mliska@suse.cz>

	* diagnostic-manager.cc (diagnostic_manager::emit_saved_diagnostics):
	Do not pass engine.

2021-02-26  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_path::exploded_path): New copy-ctor.
	* exploded-graph.h (exploded_path::operator=): Drop decl.

2021-02-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96374
	* diagnostic-manager.cc (class epath_finder): New.
	(epath_finder::get_best_epath): New.
	(saved_diagnostic::saved_diagnostic): Update for replacement of
	m_state and m_epath_length with m_best_epath.
	(saved_diagnostic::~saved_diagnostic): Delete m_best_epath.
	(saved_diagnostic::to_json): Update "path_length" to be optional.
	(saved_diagnostic::calc_best_epath): New, based on
	dedupe_winners::add and parts of dedupe_key::dedupe_key.
	(saved_diagnostic::get_epath_length): New.
	(saved_diagnostic::add_duplicate): New.
	(dedupe_key::dedupe_key): Drop epath param.  Move invocation of
	stmt_finder to saved_diagnostic::calc_best_epath.
	(class dedupe_candidate): Delete.
	(class dedupe_hash_map_traits): Update to use saved_diagnotic *
	rather than dedupe_candidate * as the value_type/compare_type.
	(dedupe_winners::~dedupe_winners): Don't delete the values.
	(dedupe_winners::add): Convert param from shortest_exploded_paths to
	epath_finder.  Drop "eg" param.  Drop dedupe_candidate, moving
	path generation and feasiblity checking to
	epath_finder::get_best_epath.  Update winner-selection for move
	of epaths from dedupe_candidate to saved_diagnostic.
	(dedupe_winners::emit_best):  Update for removal of class
	dedupe_candidate.
	(dedupe_winners::map_t): Update to use saved_diagnotic * rather
	than dedupe_candidate * as the value_type/compare_type.
	(diagnostic_manager::emit_saved_diagnostics): Move
	shortest_exploded_paths instance into epath_finder and pass that
	around instead.
	(diagnostic_manager::emit_saved_diagnostic): Drop epath, stmt
	and num_dupes params, instead getting these from the
	saved_diagnostic.  Use correct location in inform_n call.
	* diagnostic-manager.h (class epath_finder): New forward decl.
	(saved_diagnostic::status): Drop enum.
	(saved_diagnostic::set_feasible): Drop.
	(saved_diagnostic::set_infeasible): Drop.
	(saved_diagnostic::get_status): Drop.
	(saved_diagnostic::calc_best_epath): New decl.
	(saved_diagnostic::get_best_epath): New decl.
	(saved_diagnostic::get_epath_length): New decl.
	(saved_diagnostic::set_epath_length): Drop.
	(saved_diagnostic::get_epath_length): Drop inline implementation.
	(saved_diagnostic::add_duplicate): New.
	(saved_diagnostic::get_num_dupes): New.
	(saved_diagnostic::m_d): Document ownership.
	(saved_diagnostic::m_trailing_eedge): Make const.
	(saved_diagnostic::m_status): Drop field.
	(saved_diagnostic::m_epath_length): Drop field.
	(saved_diagnostic::m_best_epath): New field.
	(saved_diagnostic::m_problem): Document ownership.
	(saved_diagnostic::m_duplicates): New field.
	(diagnostic_manager::emit_saved_diagnostic): Drop params epath,
	stmt, and num_dupes.
	* engine.cc (exploded_graph_annotator::print_saved_diagnostic):
	Update for changes to saved_diagnostic class.
	* exploded-graph.h (exploded_path::feasible_p): Drop unused
	overloaded decl.

2021-02-25  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99193
	* region-model-impl-calls.cc (region_model::impl_call_realloc): New.
	* region-model.cc (region_model::on_call_pre): Call it.
	* region-model.h (region_model::impl_call_realloc): New decl.
	* sm-malloc.cc (enum wording): Add WORDING_REALLOCATED.
	(malloc_state_machine::m_realloc): New field.
	(use_after_free::describe_state_change): Add case for
	WORDING_REALLOCATED.
	(use_after_free::describe_final_event): Likewise.
	(malloc_state_machine::malloc_state_machine): Initialize
	m_realloc.
	(malloc_state_machine::on_stmt): Handle realloc by calling...
	(malloc_state_machine::on_realloc_call): New.

2021-02-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/99196
	* engine.cc (exploded_node::on_stmt): Provide terminate_path
	flag as a way for on_call_pre to terminate the current analysis
	path.
	* region-model-impl-calls.cc (call_details::num_args): New.
	(region_model::impl_call_error): New.
	* region-model.cc (region_model::on_call_pre): Add param
	"out_terminate_path".  Handle "error" and "error_at_line".
	* region-model.h (call_details::num_args): New decl.
	(region_model::on_call_pre): Add param "out_terminate_path".
	(region_model::impl_call_error): New decl.

2021-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98969
	* constraint-manager.cc (dead_svalue_purger::should_purge_p):
	Update for change to svalue::live_p.
	* program-state.cc (sm_state_map::on_liveness_change): Likewise.
	(program_state::detect_leaks): Likewise.
	* region-model-reachability.cc (reachable_regions::init_cluster):
	When dealing with a symbolic region, if the underlying pointer is
	implicitly live, add the region to the reachable regions.
	* region-model.cc (region_model::compare_initial_and_pointer):
	Move logic for detecting initial values of params to
	initial_svalue::initial_value_of_param_p.
	* svalue.cc (svalue::live_p): Convert "live_svalues" from a
	reference to a pointer; support it being NULL.
	(svalue::implicitly_live_p): Convert first param from a
	refererence to a pointer.
	(region_svalue::implicitly_live_p): Likewise.
	(constant_svalue::implicitly_live_p): Likewise.
	(initial_svalue::implicitly_live_p): Likewise.  Treat the initial
	values of params for the top level frame as still live.
	(initial_svalue::initial_value_of_param_p): New function, taken
	from a test in region_model::compare_initial_and_pointer.
	(unaryop_svalue::implicitly_live_p): Convert first param from a
	refererence to a pointer.
	(binop_svalue::implicitly_live_p): Likewise.
	(sub_svalue::implicitly_live_p): Likewise.
	(unmergeable_svalue::implicitly_live_p): Likewise.
	* svalue.h (svalue::live_p): Likewise.
	(svalue::implicitly_live_p): Likewise.
	(region_svalue::implicitly_live_p): Likewise.
	(constant_svalue::implicitly_live_p): Likewise.
	(initial_svalue::implicitly_live_p): Likewise.
	(initial_svalue::initial_value_of_param_p): New decl.
	(unaryop_svalue::implicitly_live_p): Convert first param from a
	refererence to a pointer.
	(binop_svalue::implicitly_live_p): Likewise.
	(sub_svalue::implicitly_live_p): Likewise.
	(unmergeable_svalue::implicitly_live_p): Likewise.

2021-02-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98969
	* engine.cc (readability): Add names for the various arbitrary
	values.  Handle NOP_EXPR and INTEGER_CST.
	(readability_comparator): Combine the readability tests for
	tree and stack depth, rather than performing them sequentially.
	(impl_region_model_context::on_state_leak): Strip off top-level
	casts.
	* region-model.cc (region_model::get_representative_path_var): Add
	type-checking, moving the bulk of the implementation to...
	(region_model::get_representative_path_var_1): ...here.  Respect
	types in casts by recursing and re-adding the cast, rather than
	merely stripping them off.  Use the correct type when handling
	region_svalue.
	(region_model::get_representative_tree): Strip off any top-level
	cast.
	(region_model::get_representative_path_var): Add type-checking,
	moving the bulk of the implementation to...
	(region_model::get_representative_path_var_1): ...here.
	* region-model.h (region_model::get_representative_path_var_1):
	New decl
	(region_model::get_representative_path_var_1): New decl.
	* store.cc (append_pathvar_with_type): New.
	(binding_cluster::get_representative_path_vars): Cast path_vars
	to the correct type when adding them to *OUT_PVS.

2021-02-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98575
	* sm-file.cc (is_file_using_fn_p): Support "_IO_"-prefixed
	variants.

2021-02-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98575
	* store.cc (store::set_value): Treat a pointer written to *UNKNOWN
	as having escaped.

2021-02-02  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93355
	PR analyzer/96374
	* engine.cc (toplevel_function_p): Simplify so that
	we only reject functions with a "__analyzer_" prefix.
	(add_any_callbacks): Delete.
	(exploded_graph::build_initial_worklist): Update for
	dropped param of toplevel_function_p.
	(exploded_graph::build_initial_worklist): Don't bother
	looking for callbacks that are reachable from global
	initializers.

2021-02-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98918
	* region-model-manager.cc
	(region_model_manager::get_or_create_initial_value):
	Fold the initial value of *UNKNOWN_PTR to an UNKNOWN value.
	(region_model_manager::get_field_region): Fold the value
	of UNKNOWN_PTR->FIELD to *UNKNOWN_PTR_OF_&FIELD_TYPE.

2021-01-29  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (event_kind_to_string): Handle
	EK_START_CONSOLIDATED_CFG_EDGES and
	EK_END_CONSOLIDATED_CFG_EDGES.
	(start_consolidated_cfg_edges_event::get_desc): New.
	(checker_path::cfg_edge_pair_at_p): New.
	* checker-path.h (enum event_kind): Add
	EK_START_CONSOLIDATED_CFG_EDGES and
	EK_END_CONSOLIDATED_CFG_EDGES.
	(class start_consolidated_cfg_edges_event): New class.
	(class end_consolidated_cfg_edges_event): New class.
	(checker_path::delete_events): New.
	(checker_path::replace_event): New.
	(checker_path::cfg_edge_pair_at_p): New decl.
	* diagnostic-manager.cc (diagnostic_manager::prune_path): Call
	consolidate_conditions.
	(same_line_as_p): New.
	(diagnostic_manager::consolidate_conditions): New.
	* diagnostic-manager.h
	(diagnostic_manager::consolidate_conditions): New decl.

2021-01-18  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (is_std_named_call_p): New decl.
	* diagnostic-manager.cc (path_builder::get_sm): New.
	(state_change_event_creator::state_change_event_creator): Add "pb"
	param.
	(state_change_event_creator::on_global_state_change): Don't consider
	state changes affecting other state_machines.
	(state_change_event_creator::on_state_change): Likewise.
	(state_change_event_creator::m_pb): New field.
	(diagnostic_manager::add_events_for_eedge): Pass pb to visitor
	ctor.
	* region-model-impl-calls.cc
	(region_model::impl_deallocation_call): New.
	* region-model.cc: Include "attribs.h".
	(region_model::on_call_post): Handle fndecls referenced by
	__attribute__((deallocated_by(FOO))).
	* region-model.h (region_model::impl_deallocation_call): New decl.
	* sm-malloc.cc: Include "stringpool.h" and "attribs.h".  Add
	leading comment.
	(class api): Delete.
	(enum resource_state): Update comment for change from api to
	deallocator and deallocator_set.
	(allocation_state::allocation_state): Drop api param.  Add
	"deallocators" and "deallocator".
	(allocation_state::m_api): Drop field in favor of...
	(allocation_state::m_deallocators): New field.
	(allocation_state::m_deallocator): New field.
	(enum wording): Add WORDING_DEALLOCATED.
	(struct deallocator): New.
	(struct standard_deallocator): New.
	(struct custom_deallocator): New.
	(struct deallocator_set): New.
	(struct custom_deallocator_set): New.
	(struct standard_deallocator_set): New.
	(struct deallocator_set_map_traits): New.
	(malloc_state_machine::m_malloc): Drop field
	(malloc_state_machine::m_scalar_new): Likewise.
	(malloc_state_machine::m_vector_new): Likewise.
	(malloc_state_machine::m_free): New field
	(malloc_state_machine::m_scalar_delete): Likewise.
	(malloc_state_machine::m_vector_delete): Likewise.
	(malloc_state_machine::deallocator_map_t): New typedef.
	(malloc_state_machine::m_deallocator_map): New field.
	(malloc_state_machine::deallocator_set_cache_t): New typedef.
	(malloc_state_machine::m_custom_deallocator_set_cache): New field.
	(malloc_state_machine::custom_deallocator_set_map_t): New typedef.
	(malloc_state_machine::m_custom_deallocator_set_map): New field.
	(malloc_state_machine::m_dynamic_sets): New field.
	(malloc_state_machine::m_dynamic_deallocators): New field.
	(api::api): Delete.
	(deallocator::deallocator): New ctor.
	(deallocator::hash): New.
	(deallocator::dump_to_pp): New.
	(deallocator::cmp): New.
	(deallocator::cmp_ptr_ptr): New.
	(standard_deallocator::standard_deallocator): New ctor.
	(deallocator_set::deallocator_set): New ctor.
	(deallocator_set::dump): New.
	(custom_deallocator_set::custom_deallocator_set): New ctor.
	(custom_deallocator_set::contains_p): New.
	(custom_deallocator_set::maybe_get_single): New.
	(custom_deallocator_set::dump_to_pp): New.
	(standard_deallocator_set::standard_deallocator_set): New ctor.
	(standard_deallocator_set::contains_p): New.
	(standard_deallocator_set::maybe_get_single): New.
	(standard_deallocator_set::dump_to_pp): New.
	(start_p): New.
	(class mismatching_deallocation): Update for conversion from api
	to deallocator_set and deallocator.
	(double_free::emit): Use %qs.
	(class use_after_free): Update for conversion from api to
	deallocator_set and deallocator.
	(malloc_leak::describe_state_change): Only emit "allocated here" on
	a start->nonnull transition, rather than on other transitions to
	nonnull.
	(allocation_state::dump_to_pp): Update for conversion from api to
	deallocator_set.
	(allocation_state::get_nonnull): Likewise.
	(malloc_state_machine::malloc_state_machine): Likewise.
	(malloc_state_machine::~malloc_state_machine): New.
	(malloc_state_machine::add_state): Update for conversion from api
	to deallocator_set.
	(malloc_state_machine::get_or_create_custom_deallocator_set): New.
	(malloc_state_machine::maybe_create_custom_deallocator_set): New.
	(malloc_state_machine::get_or_create_deallocator): New.
	(malloc_state_machine::on_stmt): Update for conversion from api
	to deallocator_set.  Handle "__attribute__((malloc(FOO)))", and
	the special attribute set on FOO.
	(malloc_state_machine::on_allocator_call): Update for conversion
	from api to deallocator_set.  Add "returns_nonnull" param and use
	it to affect which state to transition to.
	(malloc_state_machine::on_deallocator_call): Update for conversion
	from api to deallocator_set.

2021-01-14  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (strongly_connected_components::to_json): New.
	(worklist::to_json): New.
	(exploded_graph::to_json): JSON-ify the worklist.
	* exploded-graph.h (strongly_connected_components::to_json): New
	decl.
	(worklist::to_json): New decl.
	* store.cc (store::to_json): Fix comment.
	* supergraph.cc (supernode::to_json): Fix reference to
	"returning_call" in comment.  Add optional "fun" to JSON.
	(edge_kind_to_string): New.
	(superedge::to_json): Add "kind" to JSON.

2021-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98679
	* analyzer.h (region_offset::operator==): Make const.
	* pending-diagnostic.h (pending_diagnostic::equal_p): Likewise.
	* store.h (binding_cluster::for_each_value): Likewise.
	(binding_cluster::for_each_binding): Likewise.

2021-01-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98628
	* store.cc (binding_cluster::make_unknown_relative_to): Don't mark
	dereferenced unknown pointers as having escaped.

2021-01-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98580
	* region.cc (decl_region::get_svalue_for_initializer): Gracefully
	handle when LTO writes out DECL_INITIAL as error_mark_node.

2021-01-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97074
	* store.cc (binding_cluster::can_merge_p): Add "out_store" param
	and pass to calls to binding_cluster::make_unknown_relative_to.
	(binding_cluster::make_unknown_relative_to): Add "out_store"
	param.  Use it to mark base regions that are pointed to by
	pointers that become unknown as having escaped.
	(store::can_merge_p): Pass out_store to
	binding_cluster::can_merge_p.
	* store.h (binding_cluster::can_merge_p): Add "out_store" param.
	(binding_cluster::make_unknown_relative_to): Likewise.
	* svalue.cc (region_svalue::implicitly_live_p): New vfunc.
	* svalue.h (region_svalue::implicitly_live_p): New vfunc decl.

2021-01-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98564
	* engine.cc (exploded_path::feasible_p): Add missing call to
	bitmap_clear.

2021-01-06  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97072
	* region-model-reachability.cc (reachable_regions::init_cluster):
	Convert symbolic region handling to a switch statement.  Add cases
	to handle SK_UNKNOWN and SK_CONJURED.

2021-01-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/98293
	* store.cc (binding_map::apply_ctor_to_region): When "index" is
	NULL, iterate through the fields for RECORD_TYPEs, rather than
	creating an INTEGER_CST index.

2020-11-30  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-pass.cc: Include "analyzer/analyzer.h" for the
	declaration of sorry_no_analyzer; include "tree.h" and
	"function.h" as these are needed by it.

2020-11-30  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-pass.cc (pass_analyzer::execute): Move sorry call to...
	(sorry_no_analyzer): New.
	* analyzer.h (class state_machine): New forward decl.
	(class logger): New forward decl.
	(class plugin_analyzer_init_iface): New.
	(sorry_no_analyzer): New decl.
	* checker-path.cc (checker_path::fixup_locations): New.
	* checker-path.h (checker_event::set_location): New.
	(checker_path::fixup_locations): New decl.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Call
	checker_path::fixup_locations, and call fixup_location
	on the primary location.
	* engine.cc: Include "plugin.h".
	(class plugin_analyzer_init_impl): New.
	(impl_run_checkers): Invoke PLUGIN_ANALYZER_INIT callbacks.
	* pending-diagnostic.h (pending_diagnostic::fixup_location): New
	vfunc.

2020-11-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97893
	* sm-malloc.cc (null_deref::emit): Use CWE-476 rather than
	CWE-690, as this isn't due to an unchecked return value.
	(null_arg::emit): Likewise.

2020-11-12  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.h (checker_event::get_id_ptr): New.
	* diagnostic-manager.cc (path_builder::path_builder): Add "sd"
	param and use it to initialize new field "m_sd".
	(path_builder::get_pending_diagnostic): New.
	(path_builder::m_sd): New field.
	(diagnostic_manager::emit_saved_diagnostic): Pass sd to
	path_builder ctor.
	(diagnostic_manager::add_events_for_superedge): Call new
	maybe_add_custom_events_for_superedge vfunc.
	* engine.cc (stale_jmp_buf::stale_jmp_buf): Add "setjmp_point"
	param and use it to initialize new field "m_setjmp_point".
	Initialize new field "m_stack_pop_event".
	(stale_jmp_buf::maybe_add_custom_events_for_superedge): New vfunc
	implementation.
	(stale_jmp_buf::describe_final_event): New vfunc implementation.
	(stale_jmp_buf::m_setjmp_point): New field.
	(stale_jmp_buf::m_stack_pop_event): New field.
	(exploded_node::on_longjmp): Pass setjmp_point to stale_jmp_buf
	ctor.
	* pending-diagnostic.h
	(pending_diagnostic::maybe_add_custom_events_for_superedge): New
	vfunc.

2020-11-12  David Malcolm  <dmalcolm@redhat.com>

	PR tree-optimization/97424
	* analyzer.opt (Wanalyzer-shift-count-negative): New.
	(Wanalyzer-shift-count-overflow): New.
	* region-model.cc (class shift_count_negative_diagnostic): New.
	(class shift_count_overflow_diagnostic): New.
	(region_model::get_gassign_result): Complain about shift counts that
	are negative or are >= the operand's type's width.

2020-11-10  Martin Liska  <mliska@suse.cz>

	* constraint-manager.cc (constraint_manager::merge): Remove
	unused code.
	* constraint-manager.h: Likewise.
	* program-state.cc (sm_state_map::sm_state_map): Likewise.
	(program_state::program_state): Likewise.
	(test_sm_state_map): Likewise.
	* program-state.h: Likewise.
	* region-model-reachability.cc (reachable_regions::reachable_regions): Likewise.
	* region-model-reachability.h: Likewise.
	* region-model.cc (region_model::handle_unrecognized_call): Likewise.
	(region_model::get_reachable_svalues): Likewise.
	(region_model::can_merge_with_p): Likewise.

2020-11-05  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97668
	* svalue.cc (cmp_cst): Handle COMPLEX_CST.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::on_liveness_change): Sort the
	leaking svalues before calling on_state_leak.
	(program_state::detect_leaks): Likewise when calling
	on_svalue_leak.
	* region-model-reachability.cc
	(reachable_regions::mark_escaped_clusters): Likewise when
	calling on_escaped_function.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97608
	* region-model-reachability.cc (reachable_regions::handle_sval):
	Operands of reachable reversible operations are reachable.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class state_machine): New forward decl.
	(class logger): Likewise.
	(class visitor): Likewise.
	* complexity.cc: New file, taken from svalue.cc.
	* complexity.h: New file, taken from region-model.h.
	* region-model.h: Include "analyzer/svalue.h" and
	"analyzer/region.h".  Move struct complexity to complexity.h.
	Move svalue, its subclasses and supporting decls to svalue.h.
	Move region, its subclasses and supporting decls to region.h.
	* region.cc: Include "analyzer/region.h".
	(symbolic_region::symbolic_region): Move here from region-model.h.
	* region.h: New file, based on material from region-model.h.
	* svalue.cc: Include "analyzer/svalue.h".
	(complexity::complexity): Move to complexity.cc.
	(complexity::from_pair): Likewise.
	* svalue.h: New file, based on material from region-model.h.

2020-10-29  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::print): Guard the printing of
	the origin pointer with !flag_dump_noaddr.
	* region.cc (string_region::dump_to_pp): Likewise for
	m_string_cst.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97568
	* region-model.cc (region_model::get_initial_value_for_global):
	Move check that !DECL_EXTERNAL from here to...
	* region.cc (decl_region::get_svalue_for_initializer): ...here,
	using it to reject zero initialization.

2020-10-27  Markus Böck  <markus.boeck02@gmail.com>

	PR analyzer/96608
	* store.h (hash): Cast to intptr_t instead of long

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* constraint-manager.cc (svalue_cmp_by_ptr): Delete.
	(equiv_class::canonicalize): Use svalue::cmp_ptr_ptr instead.
	(equiv_class_cmp): Eliminate pointer comparison.
	* diagnostic-manager.cc (dedupe_key::comparator): If they are at
	the same location, also compare epath ength and pending_diagnostic
	kind.
	* engine.cc (readability_comparator): If two path_vars have the
	same readability, then impose an arbitrary ordering on them.
	(worklist::key_t::cmp): If two points have the same plan ordering,
	continue the comparison.  Call sm_state_map::cmp rather than
	comparing hash values.
	* program-state.cc (sm_state_map::entry_t::cmp): New.
	(sm_state_map::cmp): New.
	* program-state.h (sm_state_map::entry_t::cmp): New decl.
	(sm_state_map::elements): New.
	(sm_state_map::cmp): New.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (setjmp_record::cmp): New.
	(supernode_cluster::dump_dot): Avoid embedding pointer in cluster
	name.
	(supernode_cluster::cmp_ptr_ptr): New.
	(function_call_string_cluster::dump_dot): Avoid embedding pointer
	in cluster name.  Sort m_map when dumping child clusters.
	(function_call_string_cluster::cmp_ptr_ptr): New.
	(root_cluster::dump_dot): Sort m_map when dumping child clusters.
	* program-point.cc (function_point::cmp): New.
	(function_point::cmp_ptr): New.
	* program-point.h (function_point::cmp): New decl.
	(function_point::cmp_ptr): New decl.
	* program-state.cc (sm_state_map::print): Sort the values.  Guard
	the printing of pointers with !flag_dump_noaddr.
	(program_state::prune_for_point): Sort the regions.
	(log_set_of_svalues): Sort the values.  Guard the printing of
	pointers with !flag_dump_noaddr.
	* region-model-manager.cc (log_uniq_map): Sort the values.
	* region-model-reachability.cc (dump_set): New function template.
	(reachable_regions::dump_to_pp): Use it.
	* region-model.h (svalue::cmp_ptr): New decl.
	(svalue::cmp_ptr_ptr): New decl.
	(setjmp_record::cmp): New decl.
	(placeholder_svalue::get_name): New accessor.
	(widening_svalue::get_point): New accessor.
	(compound_svalue::get_map): New accessor.
	(conjured_svalue::get_stmt): New accessor.
	(conjured_svalue::get_id_region): New accessor.
	(region::cmp_ptrs): Rename to...
	(region::cmp_ptr_ptr): ...this.
	* region.cc (region::cmp_ptrs): Rename to...
	(region::cmp_ptr_ptr): ...this.
	* state-purge.cc
	(state_purge_per_ssa_name::state_purge_per_ssa_name): Sort
	m_points_needing_name when dumping.
	* store.cc (concrete_binding::cmp_ptr_ptr): New.
	(symbolic_binding::cmp_ptr_ptr): New.
	(binding_map::cmp): New.
	(get_sorted_parent_regions): Update for renaming of
	region::cmp_ptrs to region::cmp_ptr_ptr.
	(store::dump_to_pp): Likewise.
	(store::to_json): Likewise.
	(store::can_merge_p): Sort the base regions before considering
	them.
	* store.h (concrete_binding::cmp_ptr_ptr): New decl.
	(symbolic_binding::cmp_ptr_ptr): New decl.
	(binding_map::cmp): New decl.
	* supergraph.cc (supergraph::supergraph): Assign UIDs to the
	gimple stmts.
	* svalue.cc (cmp_cst): New.
	(svalue::cmp_ptr): New.
	(svalue::cmp_ptr_ptr): New.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_graph::get_or_create_node): Fix off-by-one
	when imposing param_analyzer_max_enodes_per_program_point limit.

2020-10-27  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::get_representative_path_var):
	Implement case RK_LABEL.
	* region-model.h (label_region::get_label): New accessor.

2020-10-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97514
	* engine.cc (exploded_graph::add_function_entry): Handle failure
	to create an enode, rather than asserting.

2020-10-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97489
	* engine.cc (exploded_graph::add_function_entry): Assert that we
	have a function body.
	(exploded_graph::on_escaped_function): Reject fndecls that don't
	have a function body.

2020-10-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93388
	* region-model.cc (region_model::get_initial_value_for_global):
	Fall back to returning an initial_svalue if
	decl_region::get_svalue_for_initializer fails.
	* region.cc (decl_region::get_svalue_for_initializer): Don't
	attempt to create a compound_svalue if the region has an unknown
	size.

2020-10-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93723
	* store.cc (binding_map::apply_ctor_to_region): Remove redundant
	assertion.

2020-10-12  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97258
	* engine.cc (impl_region_model_context::on_escaped_function): New
	vfunc.
	(exploded_graph::add_function_entry): Use m_functions_with_enodes
	to implement idempotency.
	(add_any_callbacks): New.
	(exploded_graph::build_initial_worklist): Use the above to find
	callbacks that are reachable from global initializers.
	(exploded_graph::on_escaped_function): New.
	* exploded-graph.h
	(impl_region_model_context::on_escaped_function): New decl.
	(exploded_graph::on_escaped_function): New decl.
	(exploded_graph::m_functions_with_enodes): New field.
	* region-model-reachability.cc
	(reachable_regions::reachable_regions): Replace "store" param with
	"model" param; use it to initialize m_model.
	(reachable_regions::add): When getting the svalue for the region,
	call get_store_value on the model rather than using an initial
	value.
	(reachable_regions::mark_escaped_clusters): Add ctxt param and
	use it to call on_escaped_function when a function_region escapes.
	* region-model-reachability.h
	(reachable_regions::reachable_regions): Replace "store" param with
	"model" param.
	(reachable_regions::mark_escaped_clusters): Add ctxt param.
	(reachable_regions::m_model): New field.
	* region-model.cc (region_model::handle_unrecognized_call): Update
	for change in reachable_regions ctor.
	(region_model::handle_unrecognized_call): Pass ctxt to
	mark_escaped_clusters.
	(region_model::get_reachable_svalues): Update for change in
	reachable_regions ctor.
	(region_model::get_initial_value_for_global): Read-only variables
	keep their initial values.
	* region-model.h (region_model_context::on_escaped_function): New
	vfunc.
	(noop_region_model_context::on_escaped_function): New.

2020-10-12  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (Wanalyzer-write-to-const): New.
	(Wanalyzer-write-to-string-literal): New.
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	Call check_for_writable_region.
	(region_model::impl_call_memset): Likewise.
	(region_model::impl_call_strcpy): Likewise.
	* region-model.cc (class write_to_const_diagnostic): New.
	(class write_to_string_literal_diagnostic): New.
	(region_model::check_for_writable_region): New.
	(region_model::set_value): Call check_for_writable_region.
	* region-model.h (region_model::check_for_writable_region): New
	decl.

2020-10-07  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97116
	* sm-malloc.cc (method_p): New.
	(describe_argument_index): New.
	(inform_nonnull_attribute): Use describe_argument_index.
	(possible_null_arg::describe_final_event): Likewise.
	(null_arg::describe_final_event): Likewise.

2020-09-29  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/95188
	* engine.cc (stmt_requires_new_enode_p): Split enodes before
	"signal" calls.

2020-09-29  David Malcolm  <dmalcolm@redhat.com>

	* constraint-manager.cc
	(constraint_manager::add_constraint_internal): Whitespace fixes.
	Silence -Wsign-compare warning.
	* engine.cc (maybe_process_run_of_before_supernode_enodes):
	Silence -Wsign-compare warning.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	* region-model.h (binop_svalue::dyn_cast_binop_svalue): Remove
	redundant "virtual".  Add FINAL OVERRIDE.
	(widening_svalue::dyn_cast_widening_svalue): Add FINAL OVERRIDE.
	(compound_svalue::dyn_cast_compound_svalue): Likewise.
	(conjured_svalue::dyn_cast_conjured_svalue): Likewise.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (null_assignment_sm_context::m_visitor):
	Remove unused field.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97233
	* analyzer.cc (is_longjmp_call_p): Require the initial argument
	to be a pointer.
	* engine.cc (exploded_node::on_longjmp): Likewise.

2020-09-28  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::print): Update check
	for m_global_state being the start state.

2020-09-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96646
	PR analyzer/96841
	* region-model.cc (region_model::get_representative_path_var):
	When handling offset_region, wrap the MEM_REF's first argument in
	an ADDR_EXPR of pointer type, rather than simply using the tree
	for the parent region.  Require the MEM_REF's second argument to
	be an integer constant.

2020-09-24  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (struct rejected_constraint): New decl.
	* analyzer.opt (fanalyzer-feasibility): New option.
	* diagnostic-manager.cc (path_builder::path_builder): Add
	"problem" param and use it to initialize new field.
	(path_builder::get_feasibility_problem): New accessor.
	(path_builder::m_feasibility_problem): New field.
	(dedupe_winners::add): Remove inversion of logic in "if" clause,
	swapping if/else suites.  In the !feasible_p suite, inspect
	flag_analyzer_feasibility and add code to handle when this
	is off, accepting the infeasible path, but recording the
	feasibility_problem.
	(diagnostic_manager::emit_saved_diagnostic): Pass the
	feasibility_problem to the path_builder.
	(diagnostic_manager::add_events_for_eedge): If we have
	a feasibility_problem at this edge, use it to add a custom event.
	* engine.cc (exploded_path::feasible_p): Pass a
	rejected_constraint ** to model.maybe_update_for_edge and transfer
	ownership of any created instance to any feasibility_problem.
	(feasibility_problem::dump_to_pp): New.
	* exploded-graph.h (feasibility_problem::feasibility_problem):
	Drop "model" param; add rejected_constraint * param.
	(feasibility_problem::~feasibility_problem): New.
	(feasibility_problem::dump_to_pp): New decl.
	(feasibility_problem::m_model): Drop field.
	(feasibility_problem::m_rc): New field.
	* program-point.cc (function_point::get_location): Handle
	PK_BEFORE_SUPERNODE and PK_AFTER_SUPERNODE.
	* program-state.cc (program_state::on_edge): Pass NULL to new
	param of region_model::maybe_update_for_edge.
	* region-model.cc (region_model::add_constraint): New overload
	adding a rejected_constraint ** param.
	(region_model::maybe_update_for_edge): Add rejected_constraint **
	param and pass it to the various apply_constraints_for_ calls.
	(region_model::apply_constraints_for_gcond): Add
	rejected_constraint ** param and pass it to add_constraint calls.
	(region_model::apply_constraints_for_gswitch): Likewise.
	(region_model::apply_constraints_for_exception): Likewise.
	(rejected_constraint::dump_to_pp): New.
	* region-model.h (region_model::maybe_update_for_edge):
	Add rejected_constraint ** param.
	(region_model::add_constraint): New overload adding a
	rejected_constraint ** param.
	(region_model::apply_constraints_for_gcond): Add
	rejected_constraint ** param.
	(region_model::apply_constraints_for_gswitch): Likewise.
	(region_model::apply_constraints_for_exception): Likewise.
	(struct rejected_constraint): New.

2020-09-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97178
	* engine.cc (impl_run_checkers): Update for change to ext_state
	ctor.
	* program-state.cc (selftest::test_sm_state_map): Pass an engine
	instance to ext_state ctor.
	(selftest::test_program_state_1): Likewise.
	(selftest::test_program_state_2): Likewise.
	(selftest::test_program_state_merging): Likewise.
	(selftest::test_program_state_merging_2): Likewise.
	* program-state.h (extrinsic_state::extrinsic_state): Remove NULL
	default value for "eng" param.

2020-09-23  Tobias Burnus  <tobias@codesourcery.com>

	* analyzer-logging.cc: Guard '#pragma ... ignored "-Wformat-diag"'
	by '#if __GNUC__ >= 10'
	* analyzer.h: Likewise.
	* call-string.cc: Likewise.

2020-09-23  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::on_stmt): Replace sequence of dyn_cast
	with switch.

2020-09-22  David Malcolm  <dmalcolm@redhat.com>

	* analysis-plan.cc: Include "json.h".
	* analyzer.opt (fdump-analyzer-json): New.
	* call-string.cc: Include "json.h".
	(call_string::to_json): New.
	* call-string.h (call_string::to_json): New decl.
	* checker-path.cc: Include "json.h".
	* constraint-manager.cc: Include "json.h".
	(equiv_class::to_json): New.
	(constraint::to_json): New.
	(constraint_manager::to_json): New.
	* constraint-manager.h (equiv_class::to_json): New decl.
	(constraint::to_json): New decl.
	(constraint_manager::to_json): New decl.
	* diagnostic-manager.cc: Include "json.h".
	(saved_diagnostic::to_json): New.
	(diagnostic_manager::to_json): New.
	* diagnostic-manager.h (saved_diagnostic::to_json): New decl.
	(diagnostic_manager::to_json): New decl.
	* engine.cc: Include "json.h", <zlib.h>.
	(exploded_node::status_to_str): New.
	(exploded_node::to_json): New.
	(exploded_edge::to_json): New.
	(exploded_graph::to_json): New.
	(dump_analyzer_json): New.
	(impl_run_checkers): Call it.
	* exploded-graph.h (exploded_node::status_to_str): New decl.
	(exploded_node::to_json): New.
	(exploded_edge::to_json): New.
	(exploded_graph::to_json): New.
	* pending-diagnostic.cc: Include "json.h".
	* program-point.cc: Include "json.h".
	(program_point::to_json): New.
	* program-point.h (program_point::to_json): New decl.
	* program-state.cc: Include "json.h".
	(extrinsic_state::to_json): New.
	(sm_state_map::to_json): New.
	(program_state::to_json): New.
	* program-state.h (extrinsic_state::to_json): New decl.
	(sm_state_map::to_json): New decl.
	(program_state::to_json): New decl.
	* region-model-impl-calls.cc: Include "json.h".
	* region-model-manager.cc: Include "json.h".
	* region-model-reachability.cc: Include "json.h".
	* region-model.cc: Include "json.h".
	* region-model.h (svalue::to_json): New decl.
	(region::to_json): New decl.
	* region.cc: Include "json.h".
	(region::to_json: New.
	* sm-file.cc: Include "json.h".
	* sm-malloc.cc: Include "json.h".
	* sm-pattern-test.cc: Include "json.h".
	* sm-sensitive.cc: Include "json.h".
	* sm-signal.cc: Include "json.h".
	(signal_delivery_edge_info_t::to_json): New.
	* sm-taint.cc: Include "json.h".
	* sm.cc: Include "diagnostic.h", "tree-diagnostic.h", and
	"json.h".
	(state_machine::state::to_json): New.
	(state_machine::to_json): New.
	* sm.h (state_machine::state::to_json): New.
	(state_machine::to_json): New.
	* state-purge.cc: Include "json.h".
	* store.cc: Include "json.h".
	(binding_key::get_desc): New.
	(binding_map::to_json): New.
	(binding_cluster::to_json): New.
	(store::to_json): New.
	* store.h (binding_key::get_desc): New decl.
	(binding_map::to_json): New decl.
	(binding_cluster::to_json): New decl.
	(store::to_json): New decl.
	* supergraph.cc: Include "json.h".
	(supergraph::to_json): New.
	(supernode::to_json): New.
	(superedge::to_json): New.
	* supergraph.h (supergraph::to_json): New decl.
	(supernode::to_json): New decl.
	(superedge::to_json): New decl.
	* svalue.cc: Include "json.h".
	(svalue::to_json): New.

2020-09-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97130
	* region-model-impl-calls.cc (call_details::get_arg_type): New.
	* region-model.cc (region_model::on_call_pre): Check that the
	initial arg is a pointer before calling impl_call_memset and
	impl_call_strlen.
	* region-model.h (call_details::get_arg_type): New decl.

2020-09-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93355
	* sm-malloc.cc (malloc_state_machine::get_default_state): Look at
	the base region when considering pointers.  Treat pointers to
	decls as being non-heap.

2020-09-18  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (warning_event::get_desc): Handle global state
	changes.

2020-09-18  David Malcolm  <dmalcolm@redhat.com>

	* sm-malloc.cc (malloc_state_machine::on_stmt): Handle strdup and
	strndup as being malloc-like allocators.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (strongly_connected_components::strong_connect): Only
	consider intraprocedural edges when creating SCCs.
	(worklist::key_t::cmp): Add comment.  Treat call_string
	differences as more important than differences of program_point
	within a supernode.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (supernode_cluster::dump_dot): Show the SCC id
	in the per-supernode clusters in FILENAME.eg.dot output.
	(exploded_graph_annotator::add_node_annotations):
	Show the SCC of the supernode in FILENAME.supernode.eg.dot output.
	* exploded-graph.h (worklist::scc_id): New.
	(exploded_graph::get_scc_id): New.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::dump_dot): Show STATUS_BULK_MERGED.
	(exploded_graph::process_worklist): Call
	maybe_process_run_of_before_supernode_enodes.
	(exploded_graph::maybe_process_run_of_before_supernode_enodes):
	New.
	(exploded_graph_annotator::print_enode): Show STATUS_BULK_MERGED.
	* exploded-graph.h (enum exploded_node::status): Add
	STATUS_BULK_MERGED.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc
	(exploded_graph::process_node) <case PK_BEFORE_SUPERNODE>:
	Simplify by using program_point::get_next.
	* program-point.cc (program_point::get_next): New.
	* program-point.h (program_point::get_next): New decl.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_graph::get_or_create_node): Show the
	program point when issuing -Wanalyzer-too-complex due to hitting
	the per-program-point limit.

2020-09-16  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_call_pre): Treat getchar as
	having no side-effects.

2020-09-15  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96650
	* constraint-manager.cc (merger_fact_visitor::on_fact): Replace
	assertion that add_constraint succeeded with an assertion that
	if it fails, -fanalyzer-transitivity is off.

2020-09-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (-param=analyzer-max-constraints=): New param.
	* constraint-manager.cc
	(constraint_manager::add_constraint_internal): Silently reject
	attempts to add constraints when the above limit is reached.

2020-09-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96653
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Don't accumulate
	transitive closure of all constraints on constants.

2020-09-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/97029
	* analyzer.cc (is_setjmp_call_p): Require the initial arg to be a
	pointer.
	* region-model.cc (region_model::deref_rvalue): Assert that the
	svalue is of pointer type.

2020-09-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96798
	* region-model-impl-calls.cc (region_model::impl_call_memcpy):
	New.
	(region_model::impl_call_strcpy): New.
	* region-model.cc (region_model::on_call_pre): Flag unhandled
	builtins that are non-pure as having unknown side-effects.
	Implement BUILT_IN_MEMCPY, BUILT_IN_MEMCPY_CHK, BUILT_IN_STRCPY,
	BUILT_IN_STRCPY_CHK, BUILT_IN_FPRINTF, BUILT_IN_FPRINTF_UNLOCKED,
	BUILT_IN_PUTC, BUILT_IN_PUTC_UNLOCKED, BUILT_IN_FPUTC,
	BUILT_IN_FPUTC_UNLOCKED, BUILT_IN_FPUTS, BUILT_IN_FPUTS_UNLOCKED,
	BUILT_IN_FWRITE, BUILT_IN_FWRITE_UNLOCKED, BUILT_IN_PRINTF,
	BUILT_IN_PRINTF_UNLOCKED, BUILT_IN_PUTCHAR,
	BUILT_IN_PUTCHAR_UNLOCKED, BUILT_IN_PUTS, BUILT_IN_PUTS_UNLOCKED,
	BUILT_IN_VFPRINTF, BUILT_IN_VPRINTF.
	* region-model.h (region_model::impl_call_memcpy): New decl.
	(region_model::impl_call_strcpy): New decl.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94355
	* analyzer.opt (Wanalyzer-mismatching-deallocation): New warning.
	* region-model-impl-calls.cc
	(region_model::impl_call_operator_new): New.
	(region_model::impl_call_operator_delete): New.
	* region-model.cc (region_model::on_call_pre): Detect operator new
	and operator delete.
	(region_model::on_call_post): Likewise.
	(region_model::maybe_update_for_edge): Detect EH edges and call...
	(region_model::apply_constraints_for_exception): New function.
	* region-model.h (region_model::impl_call_operator_new): New decl.
	(region_model::impl_call_operator_delete): New decl.
	(region_model::apply_constraints_for_exception): New decl.
	* sm-malloc.cc (enum resource_state): New.
	(struct allocation_state): New state subclass.
	(enum wording): New.
	(struct api): New.
	(malloc_state_machine::custom_data_t): New typedef.
	(malloc_state_machine::add_state): New decl.
	(malloc_state_machine::m_unchecked)
	(malloc_state_machine::m_nonnull)
	(malloc_state_machine::m_freed): Delete these states in favor
	of...
	(malloc_state_machine::m_malloc)
	(malloc_state_machine::m_scalar_new)
	(malloc_state_machine::m_vector_new): ...this new api instances,
	which own their own versions of these states.
	(malloc_state_machine::on_allocator_call): New decl.
	(malloc_state_machine::on_deallocator_call): New decl.
	(api::api): New ctor.
	(dyn_cast_allocation_state): New.
	(as_a_allocation_state): New.
	(get_rs): New.
	(unchecked_p): New.
	(nonnull_p): New.
	(freed_p): New.
	(malloc_diagnostic::describe_state_change): Use unchecked_p and
	nonnull_p.
	(class mismatching_deallocation): New.
	(double_free::double_free): Add funcname param for initializing
	m_funcname.
	(double_free::emit): Use m_funcname in warning message rather
	than hardcoding "free".
	(double_free::describe_state_change): Likewise.  Use freed_p.
	(double_free::describe_call_with_state): Use freed_p.
	(double_free::describe_final_event): Use m_funcname in message
	rather than hardcoding "free".
	(double_free::m_funcname): New field.
	(possible_null::describe_state_change): Use unchecked_p.
	(possible_null::describe_return_of_state): Likewise.
	(use_after_free::use_after_free): Add param for initializing m_api.
	(use_after_free::emit): Use m_api->m_dealloc_funcname in message
	rather than hardcoding "free".
	(use_after_free::describe_state_change): Use freed_p.  Change the
	wording of the message based on the API.
	(use_after_free::describe_final_event): Use
	m_api->m_dealloc_funcname in message rather than hardcoding
	"free".  Change the wording of the message based on the API.
	(use_after_free::m_api): New field.
	(malloc_leak::describe_state_change): Use unchecked_p.  Update
	for renaming of m_malloc_event to m_alloc_event.
	(malloc_leak::describe_final_event): Update for renaming of
	m_malloc_event to m_alloc_event.
	(malloc_leak::m_malloc_event): Rename...
	(malloc_leak::m_alloc_event): ...to this.
	(free_of_non_heap::free_of_non_heap): Add param for initializing
	m_funcname.
	(free_of_non_heap::emit): Use m_funcname in message rather than
	hardcoding "free".
	(free_of_non_heap::describe_final_event): Likewise.
	(free_of_non_heap::m_funcname): New field.
	(allocation_state::dump_to_pp): New.
	(allocation_state::get_nonnull): New.
	(malloc_state_machine::malloc_state_machine): Update for changes
	to state fields and new api fields.
	(malloc_state_machine::add_state): New.
	(malloc_state_machine::on_stmt): Move malloc/calloc handling to
	on_allocator_call and call it, passing in the API pointer.
	Likewise for free, moving it to on_deallocator_call.  Handle calls
	to operator new and delete in an analogous way.  Use unchecked_p
	when testing for possibly-null-arg and possibly-null-deref, and
	transition to the non-null for the correct API.  Remove redundant
	node param from call to on_zero_assignment.  Use freed_p for
	use-after-free check, and pass in API.
	(malloc_state_machine::on_allocator_call): New, based on code in
	on_stmt.
	(malloc_state_machine::on_deallocator_call): Likewise.
	(malloc_state_machine::on_phi): Mark node param with
	ATTRIBUTE_UNUSED; don't pass it to on_zero_assignment.
	(malloc_state_machine::on_condition): Mark node param with
	ATTRIBUTE_UNUSED.  Replace on_transition calls with get_state and
	set_next_state pairs, transitioning to the non-null state for the
	appropriate API.
	(malloc_state_machine::can_purge_p): Port to new state approach.
	(malloc_state_machine::on_zero_assignment): Replace on_transition
	calls with get_state and set_next_state pairs.  Drop redundant
	node param.
	* sm.h (state_machine::add_custom_state): New.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc
	(null_assignment_sm_context::warn_for_state): Replace with...
	(null_assignment_sm_context::warn): ...this.
	* engine.cc (impl_sm_context::warn_for_state): Replace with...
	(impl_sm_context::warn): ...this.
	* sm-file.cc (fileptr_state_machine::on_stmt): Replace
	warn_for_state and on_transition calls with a get_state
	test guarding warn and set_next_state calls.
	* sm-malloc.cc (malloc_state_machine::on_stmt): Likewise.
	* sm-pattern-test.cc (pattern_test_state_machine::on_condition):
	Replace warn_for_state call with warn call.
	* sm-sensitive.cc
	(sensitive_state_machine::warn_for_any_exposure): Replace
	warn_for_state call with a get_state test guarding a warn call.
	* sm-signal.cc (signal_state_machine::on_stmt): Likewise.
	* sm-taint.cc (taint_state_machine::on_stmt):  Replace
	warn_for_state and on_transition calls with a get_state
	test guarding warn and set_next_state calls.
	* sm.h (sm_context::warn_for_state): Replace with...
	(sm_context::warn): ...this.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc
	(null_assignment_sm_context::null_assignment_sm_context): Add old_state
	and ext_state params, initializing m_old_state and m_ext_state.
	(null_assignment_sm_context::on_transition): Split into...
	(null_assignment_sm_context::get_state): ...this new vfunc
	implementation and...
	(null_assignment_sm_context::set_next_state): ...this new vfunc
	implementation.
	(null_assignment_sm_context::m_old_state): New field.
	(null_assignment_sm_context::m_ext_state): New field.
	(diagnostic_manager::add_events_for_eedge): Pass in old state and
	ext_state when creating sm_ctxt.
	* engine.cc (impl_sm_context::on_transition): Split into...
	(impl_sm_context::get_state): ...this new vfunc
	implementation and...
	(impl_sm_context::set_next_state): ...this new vfunc
	implementation.
	* sm.h (sm_context::get_state): New pure virtual function.
	(sm_context::set_next_state): Likewise.
	(sm_context::on_transition): Convert from a pure virtual function
	to a regular function implemented in terms of get_state and
	set_next_state.

2020-09-09  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (state_change_event::get_desc): Update
	state_machine::get_state_name calls to state::get_name.
	(warning_event::get_desc): Likewise.
	* diagnostic-manager.cc
	(null_assignment_sm_context::on_transition): Update comparison
	against 0 with comparison with m_sm.get_start_state.
	(diagnostic_manager::prune_for_sm_diagnostic): Update
	state_machine::get_state_name calls to state::get_name.
	* engine.cc (impl_sm_context::on_transition): Likewise.
	(exploded_node::get_dot_fillcolor): Use get_id when summing
	the sm states.
	* program-state.cc (sm_state_map::sm_state_map): Don't hardcode
	0 as the start state when initializing m_global_state.
	(sm_state_map::print): Use dump_to_pp rather than get_state_name
	when dumping states.
	(sm_state_map::is_empty_p): Don't hardcode 0 as the start state
	when examining m_global_state.
	(sm_state_map::hash): Use get_id when hashing states.
	(selftest::test_sm_state_map): Use state objects rather than
	arbitrary hardcoded integers.
	(selftest::test_program_state_merging): Likewise.
	(selftest::test_program_state_merging_2): Likewise.
	* sm-file.cc (fileptr_state_machine::m_start): Move to base class.
	(file_diagnostic::describe_state_change): Use get_start_state.
	(fileptr_state_machine::fileptr_state_machine): Drop m_start
	initialization.
	* sm-malloc.cc (malloc_state_machine::m_start): Move to base
	class.
	(malloc_diagnostic::describe_state_change): Use get_start_state.
	(possible_null::describe_state_change): Likewise.
	(malloc_state_machine::malloc_state_machine): Drop m_start
	initialization.
	* sm-pattern-test.cc (pattern_test_state_machine::m_start): Move
	to base class.
	(pattern_test_state_machine::pattern_test_state_machine): Drop
	m_start initialization.
	* sm-sensitive.cc (sensitive_state_machine::m_start): Move to base
	class.
	(sensitive_state_machine::sensitive_state_machine): Drop m_start
	initialization.
	* sm-signal.cc (signal_state_machine::m_start): Move to base
	class.
	(signal_state_machine::signal_state_machine): Drop m_start
	initialization.
	* sm-taint.cc (taint_state_machine::m_start): Move to base class.
	(taint_state_machine::taint_state_machine): Drop m_start
	initialization.
	* sm.cc (state_machine::state::dump_to_pp): New.
	(state_machine::state_machine): Move here from sm.h.  Initialize
	m_next_state_id and m_start.
	(state_machine::add_state): Reimplement in terms of state objects.
	(state_machine::get_state_name): Delete.
	(state_machine::get_state_by_name): Reimplement in terms of state
	objects.  Make const.
	(state_machine::validate): Delete.
	(state_machine::dump_to_pp): Reimplement in terms of state
	objects.
	* sm.h (state_machine::state): New class.
	(state_machine::state_t): Convert typedef from "unsigned" to
	"const state_machine::state *".
	(state_machine::state_machine): Move to sm.cc.
	(state_machine::get_default_state): Use m_start rather than
	hardcoding 0.
	(state_machine::get_state_name): Delete.
	(state_machine::get_state_by_name): Make const.
	(state_machine::get_start_state): New accessor.
	(state_machine::alloc_state_id): New.
	(state_machine::m_state_names): Drop in favor of...
	(state_machine::m_states): New field
	(state_machine::m_start): New field
	(start_start_p): Delete.

2020-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96949
	* store.cc (binding_map::apply_ctor_val_to_range): Add
	error-handling for the cases where we have symbolic offsets.

2020-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96950
	* store.cc (binding_map::apply_ctor_to_region): Handle RANGE_EXPR
	where min_index == max_index.
	(binding_map::apply_ctor_val_to_range): Replace assertion that we
	don't have a CONSTRUCTOR value with error-handling.

2020-09-08  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96962
	* region-model.cc (region_model::on_call_pre): Fix guard on switch
	on built-ins to only consider BUILT_IN_NORMAL, rather than other
	kinds of build-ins.

2020-09-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96792
	* region-model.cc (region_model::deref_rvalue): Add the constraint
	that PTR_SVAL is non-NULL.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96798
	* region-model.cc (region_model::on_call_pre): Handle
	BUILT_IN_MEMSET_CHK.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::on_call_pre): Gather handling of
	builtins and of internal fns into switch statements.  Handle
	"alloca" and BUILT_IN_ALLOCA_WITH_ALIGN.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96860
	* region.cc (decl_region::get_svalue_for_constructor): Support
	apply_ctor_to_region failing.
	* store.cc (binding_map::apply_ctor_to_region): Add failure
	handling.
	(binding_map::apply_ctor_val_to_range): Likewise.
	(binding_map::apply_ctor_pair_to_child_region): Likewise.  Replace
	assertion that child_base_offset is not symbolic with error
	handling.
	* store.h (binding_map::apply_ctor_to_region): Convert return type
	from void to bool.
	(binding_map::apply_ctor_val_to_range): Likewise.
	(binding_map::apply_ctor_pair_to_child_region): Likewise.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96763
	* store.cc (binding_map::apply_ctor_to_region): Handle RANGE_EXPR
	by calling a new binding_map::apply_ctor_val_to_range subroutine.
	Split out the existing non-CONSTRUCTOR-handling code to a new
	apply_ctor_pair_to_child_region subroutine.
	(binding_map::apply_ctor_val_to_range): New.
	(binding_map::apply_ctor_pair_to_child_region): New, split out
	from binding_map::apply_ctor_to_region as noted above.
	* store.h (binding_map::apply_ctor_val_to_range): New decl.
	(binding_map::apply_ctor_pair_to_child_region): New decl.

2020-08-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96764
	* region-model-manager.cc
	(region_model_manager::maybe_fold_unaryop): Handle VIEW_CONVERT_EXPR.
	(region_model_manager::get_or_create_cast): Move logic for
	real->integer casting to...
	(get_code_for_cast): ...this new function, and add logic for
	real->non-integer casts.
	(region_model_manager::maybe_fold_sub_svalue): Handle
	VIEW_CONVERT_EXPR.
	* region-model.cc
	(region_model::add_any_constraints_from_gassign): Likewise.
	* svalue.cc (svalue::maybe_undo_cast): Likewise.
	(unaryop_svalue::dump_to_pp): Likewise.

2020-08-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94858
	* region-model-manager.cc
	(region_model_manager::get_or_create_widening_svalue): Assert that
	neither of the inputs are themselves widenings.
	* store.cc (store::eval_alias_1): The initial value of a pointer
	can't point to a region that was allocated on the heap after the
	beginning of the path.  A widened pointer value can't alias anything
	that the initial pointer value can't alias.
	* svalue.cc (svalue::can_merge_p): Merge BINOP (X, OP, CST) with X
	to a widening svalue.  Merge
	BINOP(WIDENING(BASE, BINOP(BASE, X)), X) and BINOP(BASE, X) to
	to the LHS of the first BINOP.

2020-08-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96777
	* region-model.h (class compound_svalue): Document that all keys
	must be concrete.
	(compound_svalue::compound_svalue): Move definition to svalue.cc.
	* store.cc (binding_map::apply_ctor_to_region): Handle
	initializers for trailing arrays with incomplete size.
	* svalue.cc (compound_svalue::compound_svalue): Move definition
	here from region-model.h.  Add assertion that all keys are
	concrete.

2020-08-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94851
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Fold bitwise "& 0" to 0.

2020-08-22  David Malcolm  <dmalcolm@redhat.com>

	* store.cc (store::eval_alias): Make const.  Split out 2nd half
	into store::eval_alias_1 and call it twice for symmetry, avoiding
	test duplication.
	(store::eval_alias_1): New function, split out from the above.
	* store.h (store::eval_alias): Make const.
	(store::eval_alias_1): New decl.

2020-08-22  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::push_frame): Bind the default
	SSA name for each parm if it exists, falling back to the parm
	itself otherwise, rather than doing both.

2020-08-20  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96723
	* region-model-manager.cc
	(region_model_manager::get_field_region): Assert that field is a
	FIELD_DECL.
	* region.cc (region::get_subregions_for_binding): In
	union-handling, filter the TYPE_FIELDS traversal to just FIELD_DECLs.

2020-08-20  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96713
	* region-model.cc (region_model::get_gassign_result): For
	comparisons, only use eval_condition when the lhs has boolean
	type, and use get_or_create_constant_svalue on the boolean
	constants directly rather than via get_rvalue.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96643
	* region-model.cc (region_model::deref_rvalue): Rather than
	attempting to handle all svalue kinds in the switch, only cover
	the special cases, and move symbolic-region handling to after
	the switch, thus implicitly handling the missing case SK_COMPOUND.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96705
	* region-model-manager.cc
	(region_model_manager::maybe_fold_binop): Check that we have an
	integral type before calling build_int_cst.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96699
	* region-model-manager.cc
	(region_model_manager::get_or_create_cast): Use FIX_TRUNC_EXPR for
	casting from REAL_TYPE to INTEGER_TYPE.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96651
	* region-model.cc (region_model::called_from_main_p): New.
	(region_model::get_store_value): Move handling for globals into...
	(region_model::get_initial_value_for_global): ...this new
	function, and add logic for extracting values from decl
	initializers.
	* region-model.h (decl_region::get_svalue_for_constructor): New
	decl.
	(decl_region::get_svalue_for_initializer): New decl.
	(region_model::called_from_main_p): New decl.
	(region_model::get_initial_value_for_global): New.
	* region.cc (decl_region::maybe_get_constant_value): Move logic
	for getting an svalue from a CONSTRUCTOR node to...
	(decl_region::get_svalue_for_constructor): ...this new function.
	(decl_region::get_svalue_for_initializer): New.
	* store.cc (get_svalue_for_ctor_val): Rewrite in terms of
	region_model::get_rvalue.
	* store.h (binding_cluster::get_map): New accessor.

2020-08-19  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96648
	* region.cc (get_field_at_bit_offset): Gracefully handle negative
	values for bit_offset.

2020-08-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::get_rvalue_1): Fix name of local.

2020-08-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96641
	* region-model.cc (region_model::get_rvalue_1): Handle
	unrecognized tree codes by returning "UNKNOWN.

2020-08-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96640
	* region-model.cc (region_model::get_gassign_result): Handle various
	VEC_* tree codes by returning UNKNOWN.
	(region_model::on_assignment): Handle unrecognized tree codes by
	setting lhs to an unknown value, rather than issuing a "sorry" and
	asserting.

2020-08-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96644
	* region-model-manager.cc (get_region_for_unexpected_tree_code):
	Handle ctxt being NULL.

2020-08-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96639
	* region.cc (region::get_subregions_for_binding): Check for "type"
	being NULL.

2020-08-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96642
	* store.cc (get_svalue_for_ctor_val): New.
	(binding_map::apply_ctor_to_region): Call it.

2020-08-14  David Malcolm  <dmalcolm@redhat.com>

	PR testsuite/96609
	PR analyzer/96616
	* region-model.cc (region_model::get_store_value): Call
	maybe_get_constant_value on decl_regions first.
	* region-model.h (decl_region::maybe_get_constant_value): New decl.
	* region.cc (decl_region::get_stack_depth): Likewise.
	(decl_region::maybe_get_constant_value): New.
	* store.cc (get_subregion_within_ctor): New.
	(binding_map::apply_ctor_to_region): New.
	* store.h (binding_map::apply_ctor_to_region): New decl.

2020-08-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/96611
	* store.cc (store::mark_as_escaped): Reject attempts to
	get a cluster for an unknown pointer.

2020-08-13  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93032
	PR analyzer/93938
	PR analyzer/94011
	PR analyzer/94099
	PR analyzer/94399
	PR analyzer/94458
	PR analyzer/94503
	PR analyzer/94640
	PR analyzer/94688
	PR analyzer/94689
	PR analyzer/94839
	PR analyzer/95026
	PR analyzer/95042
	PR analyzer/95240
	* analyzer-logging.cc: Ignore "-Wformat-diag".
	(logger::enter_scope): Use inc_indent in both overloads.
	(logger::exit_scope): Use dec_indent.
	* analyzer-logging.h (logger::inc_indent): New.
	(logger::dec_indent): New.
	* analyzer-selftests.cc (run_analyzer_selftests): Call
	analyzer_store_cc_tests.
	* analyzer-selftests.h (analyzer_store_cc_tests): New decl.
	* analyzer.cc (get_stmt_location): New function.
	* analyzer.h (class initial_svalue): New forward decl.
	(class unaryop_svalue): New forward decl.
	(class binop_svalue): New forward decl.
	(class sub_svalue): New forward decl.
	(class unmergeable_svalue): New forward decl.
	(class placeholder_svalue): New forward decl.
	(class widening_svalue): New forward decl.
	(class compound_svalue): New forward decl.
	(class conjured_svalue): New forward decl.
	(svalue_set): New typedef.
	(class map_region): Delete.
	(class array_region): Delete.
	(class frame_region): New forward decl.
	(class function_region): New forward decl.
	(class label_region): New forward decl.
	(class decl_region): New forward decl.
	(class element_region): New forward decl.
	(class offset_region): New forward decl.
	(class cast_region): New forward decl.
	(class field_region): New forward decl.
	(class string_region): New forward decl.
	(class region_model_manager): New forward decl.
	(class store_manager): New forward decl.
	(class store): New forward decl.
	(class call_details): New forward decl.
	(struct svalue_id_merger_mapping): Delete.
	(struct canonicalization): Delete.
	(class function_point): New forward decl.
	(class engine): New forward decl.
	(dump_tree): New function decl.
	(print_quoted_type): New function decl.
	(readability_comparator): New function decl.
	(tree_cmp): New function decl.
	(class path_var): Move here from region-model.h
	(bit_offset_t, bit_size_t, byte_size_t): New typedefs.
	(class region_offset): New class.
	(get_stmt_location): New decl.
	(struct member_function_hash_traits): New struct.
	(class consolidation_map): New class.
	Ignore "-Wformat-diag".
	* analyzer.opt (-param=analyzer-max-svalue-depth=): New param.
	(-param=analyzer-max-enodes-for-full-dump=): New param.
	* call-string.cc: Ignore -Wformat-diag.
	* checker-path.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(state_change_event::state_change_event): Replace "tree var" param
	with "const svalue *sval".  Convert "origin" param from tree to
	"const svalue *".
	(state_change_event::get_desc): Call get_representative_tree to
	convert the var and origin from const svalue * to tree.  Use
	svalue::get_desc rather than %qE when describing state changes.
	(checker_path::add_final_event): Use get_stmt_location.
	* checker-path.h (state_change_event::state_change_event): Port
	from tree to const svalue *.
	(state_change_event::get_lvalue): Delete.
	(state_change_event::get_dest_function): New.
	(state_change_event::m_var): Replace with...
	(state_change_event::m_sval): ...this.
	(state_change_event::m_origin): Convert from tree to
	const svalue *.
	* constraint-manager.cc: Include "analyzer/call-string.h",
	"analyzer/program-point.h", and "analyzer/store.h" before
	"analyzer/region-model.h".
	(struct bound, struct range): Move to constraint-manager.h.
	(compare_constants): New function.
	(range::dump): Rename to...
	(range::dump_to_pp): ...this.  Support NULL constants.
	(range::dump): Reintroduce for dumping to stderr.
	(range::constrained_to_single_element): Return result, rather than
	writing to *OUT.
	(range::eval_condition): New.
	(range::below_lower_bound): New.
	(range::above_upper_bound): New.
	(equiv_class::equiv_class): Port from svalue_id to const svalue *.
	(equiv_class::print): Likewise.
	(equiv_class::hash): Likewise.
	(equiv_class::operator==): Port from svalue_id to const svalue *.
	(equiv_class::add): Port from svalue_id to const svalue *. Drop
	"cm" param.
	(equiv_class::del): Port from svalue_id to const svalue *.
	(equiv_class::get_representative): Likewise.
	(equiv_class::remap_svalue_ids): Delete.
	(svalue_id_cmp_by_id): Rename to...
	(svalue_cmp_by_ptr): ...this, porting from svalue_id to
	const svalue *.
	(equiv_class::canonicalize): Update qsort comparator.
	(constraint::implied_by): New.
	(constraint_manager::constraint_manager): Copy m_mgr in copy ctor.
	(constraint_manager::dump_to_pp): Add "multiline" param
	(constraint_manager::dump): Pass "true" for "multiline".
	(constraint_manager::add_constraint): Port from svalue_id to
	const svalue *.  Split out second part into...
	(constraint_manager::add_unknown_constraint): ...this new
	function.  Remove self-constraints when merging equivalence
	classes.
	(constraint_manager::add_constraint_internal): Remove constraints
	that would be implied by the new constraint.  Port from svalue_id
	to const svalue *.
	(constraint_manager::get_equiv_class_by_sid): Rename to...
	(constraint_manager::get_equiv_class_by_svalue): ...this, porting
	from svalue_id to const svalue *.
	(constraint_manager::get_or_add_equiv_class): Port from svalue_id
	to const svalue *.
	(constraint_manager::eval_condition): Make const.  Call
	compare_constants and return early if it provides a known result.
	(constraint_manager::get_ec_bounds): New.
	(constraint_manager::eval_condition): New overloads.  Make
	existing one const, and use compare_constants.
	(constraint_manager::purge): Convert "p" param to a template
	rather that an abstract base class.  Port from svalue_id to
	const svalue *.
	(class dead_svalue_purger): New class.
	(constraint_manager::remap_svalue_ids): Delete.
	(constraint_manager::on_liveness_change): New.
	(equiv_class_cmp): Port from svalue_id to const svalue *.
	(constraint_manager::canonicalize): Likewise.  Combine with
	purging of redundant equivalence classes and constraints.
	(class cleaned_constraint_manager): Delete.
	(class merger_fact_visitor): Make "m_cm_b" const.  Add "m_merger"
	field.
	(merger_fact_visitor::fact): Port from svalue_id to const svalue *.
	Add special case for widening.
	(constraint_manager::merge): Port from svalue_id to const svalue *.
	(constraint_manager::clean_merger_input): Delete.
	(constraint_manager::for_each_fact): Port from svalue_id to
	const svalue *.
	(constraint_manager::validate): Likewise.
	(selftest::test_constraint_conditions): Provide a
	region_model_manager when creating region_model instances.
	Add test for self-equality not creating equivalence classes.
	(selftest::test_transitivity): Provide a region_model_manager when
	creating region_model instances.  Verify that EC-merging happens
	when constraints are implied.
	(selftest::test_constant_comparisons):  Provide a
	region_model_manager when creating region_model instances.
	(selftest::test_constraint_impl): Likewise.  Remove over-specified
	assertions.
	(selftest::test_equality): Provide a region_model_manager when
	creating region_model instances.
	(selftest::test_many_constants): Likewise.  Provide a
	program_point when testing merging.
	(selftest::run_constraint_manager_tests): Move call to
	test_constant_comparisons to outside the transitivity guard.
	* constraint-manager.h (struct bound): Move here from
	constraint-manager.cc.
	(struct range): Likewise.
	(struct::eval_condition): New decl.
	(struct::below_lower_bound): New decl.
	(struct::above_upper_bound): New decl.
	(equiv_class::add): Port from svalue_id to const svalue *.
	(equiv_class::del): Likewise.
	(equiv_class::get_representative): Likewise.
	(equiv_class::remap_svalue_ids): Drop.
	(equiv_class::m_cst_sid): Convert to..
	(equiv_class::m_cst_sval): ...this.
	(equiv_class::m_vars): Port from svalue_id to const svalue *.
	(constraint::bool implied_by): New decl.
	(fact_visitor::on_fact): Port from svalue_id to const svalue *.
	(constraint_manager::constraint_manager): Add mgr param.
	(constraint_manager::clone): Delete.
	(constraint_manager::maybe_get_constant): Delete.
	(constraint_manager::get_sid_for_constant): Delete.
	(constraint_manager::get_num_svalues): Delete.
	(constraint_manager::dump_to_pp): Add "multiline" param.
	(constraint_manager::get_equiv_class): Port from svalue_id to
	const svalue *.
	(constraint_manager::add_constraint):  Likewise.
	(constraint_manager::get_equiv_class_by_sid): Rename to...
	(constraint_manager::get_equiv_class_by_svalue): ...this, porting
	from svalue_id to const svalue *.
	(constraint_manager::add_unknown_constraint): New decl.
	(constraint_manager::get_or_add_equiv_class): Port from svalue_id
	to const svalue *.
	(constraint_manager::eval_condition): Likewise.  Add overloads.
	(constraint_manager::get_ec_bounds): New decl.
	(constraint_manager::purge): Convert to template.
	(constraint_manager::remap_svalue_ids): Delete.
	(constraint_manager::on_liveness_change): New decl.
	(constraint_manager::canonicalize): Drop param.
	(constraint_manager::clean_merger_input): Delete.
	(constraint_manager::m_mgr): New field.
	* diagnostic-manager.cc: Move includes of
	"analyzer/call-string.h" and "analyzer/program-point.h" to before
	"analyzer/region-model.h", and also include "analyzer/store.h"
	before it.
	(saved_diagnostic::saved_diagnostic): Add "sval" param.
	(diagnostic_manager::diagnostic_manager): Add engine param.
	(diagnostic_manager::add_diagnostic): Add "sval" param, passing it
	to saved_diagnostic ctor.  Update overload to pass NULL for it.
	(dedupe_winners::dedupe_winners): Add engine param.
	(dedupe_winners::add): Add "eg" param.  Pass m_engine to
	feasible_p.
	(dedupe_winner::m_engine): New field.
	(diagnostic_manager::emit_saved_diagnostics): Pass engine to
	dedupe_winners.  Pass &eg when adding candidates.  Pass svalue
	rather than tree to prune_path.  Use get_stmt_location to get
	primary location of diagnostic.
	(diagnostic_manager::emit_saved_diagnostic): Likewise.
	(get_any_origin): Drop.
	(state_change_event_creator::on_global_state_change): Pass NULL
	const svalue * rather than NULL_TREE trees to state_change_event
	ctor.
	(state_change_event_creator::on_state_change): Port from tree and
	svalue_id to const svalue *.
	(for_each_state_change): Port from svalue_id to const svalue *.
	(struct null_assignment_sm_context): New.
	(diagnostic_manager::add_events_for_eedge):  Add state change
	events for assignment to NULL.
	(diagnostic_manager::prune_path): Update param from tree to
	const svalue *.
	(diagnostic_manager::prune_for_sm_diagnostic): Port from tracking
	by tree to by const svalue *.
	* diagnostic-manager.h (saved_diagnostic::saved_diagnostic): Add sval
	param.
	(saved_diagnostic::m_sval): New field.
	(diagnostic_manager::diagnostic_manager): Add engine param.
	(diagnostic_manager::get_engine): New.
	(diagnostic_manager::add_diagnostic): Add "sval" param.
	(diagnostic_manager::prune_path): Likewise.
	(diagnostic_manager::prune_for_sm_diagnostic): New overload.
	(diagnostic_manager::m_eng): New field.
	* engine.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(impl_region_model_context::impl_region_model_context): Update for
	removal of m_change field.
	(impl_region_model_context::remap_svalue_ids): Delete.
	(impl_region_model_context::on_svalue_leak): New.
	(impl_region_model_context::on_svalue_purge): Delete.
	(impl_region_model_context::on_liveness_change): New.
	(impl_region_model_context::on_unknown_change): Update param
	from svalue_id to const svalue *.  Add is_mutable param.
	(setjmp_svalue::compare_fields): Delete.
	(setjmp_svalue::accept): New.
	(setjmp_svalue::add_to_hash): Delete.
	(setjmp_svalue::dump_to_pp): New.
	(setjmp_svalue::print_details): Delete.
	(impl_sm_context::impl_sm_context): Drop "change" param.
	(impl_sm_context::get_fndecl_for_call): Drop "m_change".
	(impl_sm_context::on_transition): Drop ATTRIBUTE_UNUSED from
	"stmt" param.  Drop m_change.  Port from svalue_id to
	const svalue *.
	(impl_sm_context::warn_for_state): Drop m_change.  Port from
	svalue_id to const svalue *.
	(impl_sm_context::get_readable_tree): Rename to...
	(impl_sm_context::get_diagnostic_tree): ...this.  Port from
	svalue_id to const svalue *.
	(impl_sm_context::is_zero_assignment): New.
	(impl_sm_context::m_change): Delete field.
	(leak_stmt_finder::find_stmt): Handle m_var being NULL.
	(readability):  Increase penalty for MEM_REF.  For SSA_NAMEs,
	slightly favor the underlying var over the SSA name.  Heavily
	penalize temporaries.  Handle RESULT_DECL.
	(readability_comparator): Make non-static.  Consider stack depths.
	(impl_region_model_context::on_state_leak): Convert from svalue_id
	to const svalue *, updating for region_model changes.  Use
	id_equal.
	(impl_region_model_context::on_inherited_svalue): Delete.
	(impl_region_model_context::on_cast): Delete.
	(impl_region_model_context::on_condition):  Drop m_change.
	(impl_region_model_context::on_phi): Likewise.
	(impl_region_model_context::on_unexpected_tree_code): Handle t
	being NULL.
	(point_and_state::validate): Update stack checking for
	region_model changes.
	(eg_traits::dump_args_t::show_enode_details_p): New.
	(exploded_node::exploded_node): Initialize m_num_processed_stmts.
	(exploded_node::get_processed_stmt): New function.
	(exploded_node::get_dot_fillcolor): Add more colors.
	(exploded_node::dump_dot): Guard the printing of the point and
	state with show_enode_details_p.  Print the processed stmts for
	this enode after the initial state.
	(exploded_node::dump_to_pp): Pass true for new multiline param
	of program_state::dump_to_pp.
	(exploded_node::on_stmt): Drop "change" param.  Log the stmt.
	Set input_location.  Implement __analyzer_describe.  Update
	implementation of __analyzer_dump and __analyzer_eval.
	Remove purging of sm-state for unknown fncalls from here.
	(exploded_node::on_edge): Drop "change" param.
	(exploded_node::on_longjmp): Port from region_id/svalue_id to
	const region */const svalue *.  Call program_state::detect_leaks.
	Drop state_change.
	(exploded_node::detect_leaks): Update for changes to region_model.
	Call program_state::detect_leaks.
	(exploded_edge::exploded_edge): Drop ext_state and change params.
	(exploded_edge::dump_dot): "args" is no longer used.  Drop dumping
	of m_change.
	(exploded_graph::exploded_graph): Pass engine to
	m_diagnostic_manager ctor.  Use program_point::origin.
	(exploded_graph::add_function_entry):  Drop ctxt.  Use
	program_state::push_frame.  Drop state_change.
	(exploded_graph::get_or_create_node): Drop "change" param.  Add
	"enode_for_diag" param.  Update dumping calls for API changes.
	Pass point to can_merge_with_p.  Show enode indices
	within -Wanalyzer-too-complex diagnostic for hitting the per-point
	limit.
	(exploded_graph::add_edge): Drop "change" param.  Log which nodes
	are being connected.  Update for changes to exploded_edge ctor.
	(exploded_graph::get_per_program_point_data): New.
	(exploded_graph::process_worklist): Pass point to
	can_merge_with_p.  Drop state_change.  Update dumping call for API
	change.
	(exploded_graph::process_node):  Drop state_change.  Split the
	node in-place if an sm-state-change occurs.  Update
	m_num_processed_stmts.  Update dumping calls for API change.
	(exploded_graph::log_stats): Call engine::log_stats.
	(exploded_graph::dump_states_for_supernode): Update dumping
	call.
	(exploded_path::feasible_p): Add "eng" and "eg" params.
	Rename "i" to "end_idx".  Pass the manager to the region_model
	ctor.  Update for every processed stmt in the enode, not just the
	first.  Keep track of which snodes have been visited, and call
	loop_replay_fixup when revisiting one.
	(enode_label::get_text): Update dump call for new param.
	(exploded_graph::dump_exploded_nodes): Likewise.
	(exploded_graph::get_node_by_index): New.
	(impl_run_checkers): Create engine instance and pass its address
	to extrinsic_state ctor.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Drop
	"change" params.
	(impl_region_model_context::void remap_svalue_ids): Delete.
	(impl_region_model_context::on_svalue_purge): Delete.
	(impl_region_model_context::on_svalue_leak): New.
	(impl_region_model_context::on_liveness_change): New.
	(impl_region_model_context::on_state_leak): Update signature.
	(impl_region_model_context::on_inherited_svalue): Delete.
	(impl_region_model_context::on_cast): Delete.
	(impl_region_model_context::on_unknown_change): Update signature.
	(impl_region_model_context::m_change): Delete.
	(eg_traits::dump_args_t::show_enode_details_p): New.
	(exploded_node::on_stmt): Drop "change" param.
	(exploded_node::on_edge): Likewise.
	(exploded_node::get_processed_stmt): New decl.
	(exploded_node::m_num_processed_stmts): New field.
	(exploded_edge::exploded_edge): Drop ext_state and change params.
	(exploded_edge::m_change): Delete.
	(exploded_graph::get_engine): New accessor.
	(exploded_graph::get_or_create_node): Drop "change" param.  Add
	"enode_for_diag" param.
	(exploded_graph::add_edge): Drop "change" param.
	(exploded_graph::get_per_program_point_data): New decl.
	(exploded_graph::get_node_by_index): New decl.
	(exploded_path::feasible_p): Add "eng" and "eg" params.
	* program-point.cc: Include "analyzer/store.h" before including
	"analyzer/region-model.h".
	(function_point::function_point): Move here from
	program-point.h.
	(function_point::get_function): Likewise.
	(function_point::from_function_entry): Likewise.
	(function_point::before_supernode): Likewise.
	(function_point::next_stmt): New function.
	* program-point.h (function_point::function_point): Move
	implementation from here to program-point.cc.
	(function_point::get_function): Likewise.
	(function_point::from_function_entry): Likewise.
	(function_point::before_supernode): Likewise.
	(function_point::next_stmt): New decl.
	(program_point::operator!=): New.
	(program_point::origin): New.
	(program_point::next_stmt): New.
	(program_point::m_function_point): Make non-const.
	* program-state.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(extrinsic_state::get_model_manager): New.
	(sm_state_map::sm_state_map): Pass in sm and sm_idx to ctor,
	rather than pass the around.
	(sm_state_map::clone_with_remapping): Delete.
	(sm_state_map::print): Remove "sm" param in favor of "m_sm".  Add
	"simple" and "multiline" params and support multiline vs single
	line dumping.
	(sm_state_map::dump): Remove "sm" param in favor of "m_sm".  Add
	"simple" param.
	(sm_state_map::hash): Port from svalue_id to const svalue *.
	(sm_state_map::operator==): Likewise.
	(sm_state_map::get_state): Likewise.  Call canonicalize_svalue on
	input.  Handle inheritance of sm-state.  Call get_default_state.
	(sm_state_map::get_origin): Port from svalue_id to const svalue *.
	(sm_state_map::set_state): Likewise.  Pass in ext_state.  Reject
	attempts to set state on UNKNOWN.
	(sm_state_map::impl_set_state): Port from svalue_id to
	const svalue *.  Pass in ext_state.  Call canonicalize_svalue on
	input.
	(sm_state_map::purge_for_unknown_fncall): Delete.
	(sm_state_map::on_svalue_leak): New.
	(sm_state_map::remap_svalue_ids): Delete.
	(sm_state_map::on_liveness_change): New.
	(sm_state_map::on_unknown_change): Reimplement.
	(sm_state_map::on_svalue_purge): Delete.
	(sm_state_map::on_inherited_svalue): Delete.
	(sm_state_map::on_cast): Delete.
	(sm_state_map::validate): Delete.
	(sm_state_map::canonicalize_svalue): New.
	(program_state::program_state): Update to pass manager to
	region_model's ctor.  Constify num_states and pass state machine
	and index to sm_state_map ctor.
	(program_state::print): Update for changes to dump API.
	(program_state::dump_to_pp): Ignore the summarize param.  Add
	"multiline" param.
	(program_state::dump_to_file): Add "multiline" param.
	(program_state::dump): Pass "true" for new "multiline" param.
	(program_state::push_frame): New.
	(program_state::on_edge): Drop "change" param.  Call
	program_state::detect_leaks.
	(program_state::prune_for_point): Add enode_for_diag param.
	Reimplement based on store class.  Call detect_leaks
	(program_state::remap_svalue_ids): Delete.
	(program_state::get_representative_tree): Port from svalue_id to
	const svalue *.
	(program_state::can_merge_with_p): Add "point" param.  Add early
	reject for sm-differences.  Drop id remapping.
	(program_state::validate): Drop region model and sm_state_map
	validation.
	(state_change::sm_change::dump): Delete.
	(state_change::sm_change::remap_svalue_ids): Delete.
	(state_change::sm_change::on_svalue_purge): Delete.
	(log_set_of_svalues): New.
	(state_change::sm_change::validate): Delete.
	(state_change::state_change): Delete.
	(state_change::add_sm_change): Delete.
	(state_change::affects_p): Delete.
	(state_change::dump): Delete.
	(state_change::remap_svalue_ids): Delete.
	(state_change::on_svalue_purge): Delete.
	(state_change::validate): Delete.
	(selftest::assert_dump_eq): Delete.
	(ASSERT_DUMP_EQ): Delete.
	(selftest::test_sm_state_map): Update for changes to region_model
	and sm_state_map, porting from svalue_id to const svalue *.
	(selftest::test_program_state_dumping): Likewise.  Drop test of
	dumping, renaming to...
	(selftest::test_program_state_1): ...this.
	(selftest::test_program_state_dumping_2): Likewise, renaming to...
	(selftest::test_program_state_2): ...this.
	(selftest::test_program_state_merging): Update for changes to
	region_model.
	(selftest::test_program_state_merging_2): Likewise.
	(selftest::analyzer_program_state_cc_tests): Update for renamed
	tests.
	* program-state.h (extrinsic_state::extrinsic_state): Add logger
	and engine params.
	(extrinsic_state::get_logger): New accessor.
	(extrinsic_state::get_engine): New accessor.
	(extrinsic_state::get_model_manager): New accessor.
	(extrinsic_state::m_logger): New field.
	(extrinsic_state::m_engine): New field.
	(struct default_hash_traits<svalue_id>): Delete.
	(pod_hash_traits<svalue_id>::hash): Delete.
	(pod_hash_traits<svalue_id>::equal): Delete.
	(pod_hash_traits<svalue_id>::mark_deleted): Delete.
	(pod_hash_traits<svalue_id>::mark_empty): Delete.
	(pod_hash_traits<svalue_id>::is_deleted): Delete.
	(pod_hash_traits<svalue_id>::is_empty): Delete.
	(sm_state_map::entry_t::entry_t): Port from svalue_id to
	const svalue *.
	(sm_state_map::entry_t::m_origin): Likewise.
	(sm_state_map::map_t): Likewise.
	(sm_state_map::sm_state_map): Add state_machine and index params.
	(sm_state_map::clone_with_remapping): Delete.
	(sm_state_map::print):  Drop sm param; add simple and multiline
	params.
	(sm_state_map::dump): Drop sm param; add simple param.
	(sm_state_map::get_state): Port from svalue_id to const svalue *.
	Add ext_state param.
	(sm_state_map::get_origin): Likewise.
	(sm_state_map::set_state): Likewise.
	(sm_state_map::impl_set_state): Likewise.
	(sm_state_map::purge_for_unknown_fncall): Delete.
	(sm_state_map::remap_svalue_ids): Delete.
	(sm_state_map::on_svalue_purge): Delete.
	(sm_state_map::on_svalue_leak): New.
	(sm_state_map::on_liveness_change): New.
	(sm_state_map::on_inherited_svalue): Delete.
	(sm_state_map::on_cast): Delete.
	(sm_state_map::validate): Delete.
	(sm_state_map::on_unknown_change): Port from svalue_id to
	const svalue *.  Add is_mutable and ext_state params.
	(sm_state_map::canonicalize_svalue): New.
	(sm_state_map::m_sm): New field.
	(sm_state_map::m_sm_idx): New field.
	(program_state::operator=): Delete.
	(program_state::dump_to_pp): Drop "summarize" param, adding
	"simple" and "multiline".
	(program_state::dump_to_file): Likewise.
	(program_state::dump): Rename "summarize" to "simple".
	(program_state::push_frame): New.
	(program_state::get_current_function): New.
	(program_state::on_edge): Drop "change" param.
	(program_state::prune_for_point): Likewise.  Add enode_for_diag
	param.
	(program_state::remap_svalue_ids): Delete.
	(program_state::get_representative_tree): Port from svalue_id to
	const svalue *.
	(program_state::can_purge_p): Likewise.  Pass ext_state to get_state.
	(program_state::can_merge_with_p): Add point param.
	(program_state::detect_leaks): New.
	(state_change_visitor::on_state_change): Port from tree and
	svalue_id to a pair of const svalue *.
	(class state_change): Delete.
	* region.cc: New file.
	* region-model-impl-calls.cc: New file.
	* region-model-manager.cc: New file.
	* region-model-reachability.cc: New file.
	* region-model-reachability.h: New file.
	* region-model.cc: Include "analyzer/call-string.h",
	"analyzer/program-point.h", and "analyzer/store.h" before
	"analyzer/region-model.h".  Include
	"analyzer/region-model-reachability.h".
	(dump_tree): Make non-static.
	(dump_quoted_tree): Make non-static.
	(print_quoted_type): Make non-static.
	(path_var::dump): Delete.
	(dump_separator): Delete.
	(class impl_constraint_manager): Delete.
	(svalue_id::print): Delete.
	(svalue_id::dump_node_name_to_pp): Delete.
	(svalue_id::validate): Delete.
	(region_id::print): Delete.
	(region_id::dump_node_name_to_pp): Delete.
	(region_id::validate): Delete.
	(region_id_set::region_id_set): Delete.
	(svalue_id_set::svalue_id_set): Delete.
	(svalue::operator==): Delete.
	(svalue::hash): Delete.
	(svalue::print): Delete.
	(svalue::dump_dot_to_pp): Delete.
	(svalue::remap_region_ids): Delete.
	(svalue::walk_for_canonicalization): Delete.
	(svalue::get_child_sid): Delete.
	(svalue::maybe_get_constant): Delete.
	(region_svalue::compare_fields): Delete.
	(region_svalue::add_to_hash): Delete.
	(region_svalue::print_details): Delete.
	(region_svalue::dump_dot_to_pp): Delete.
	(region_svalue::remap_region_ids): Delete.
	(region_svalue::merge_values): Delete.
	(region_svalue::walk_for_canonicalization): Delete.
	(region_svalue::eval_condition): Delete.
	(constant_svalue::compare_fields): Delete.
	(constant_svalue::add_to_hash): Delete.
	(constant_svalue::merge_values): Delete.
	(constant_svalue::eval_condition): Move to svalue.cc.
	(constant_svalue::print_details): Delete.
	(constant_svalue::get_child_sid): Delete.
	(unknown_svalue::compare_fields): Delete.
	(unknown_svalue::add_to_hash): Delete.
	(unknown_svalue::print_details): Delete.
	(poison_kind_to_str): Move to svalue.cc.
	(poisoned_svalue::compare_fields): Delete.
	(poisoned_svalue::add_to_hash): Delete.
	(poisoned_svalue::print_details): Delete.
	(region_kind_to_str): Move to region.cc and reimplement.
	(region::operator==): Delete.
	(region::get_parent_region): Delete.
	(region::set_value): Delete.
	(region::become_active_view): Delete.
	(region::deactivate_any_active_view): Delete.
	(region::deactivate_view): Delete.
	(region::get_value): Delete.
	(region::get_inherited_child_sid): Delete.
	(region_model::copy_region): Delete.
	(region_model::copy_struct_region): Delete.
	(region_model::copy_union_region): Delete.
	(region_model::copy_array_region): Delete.
	(region::hash): Delete.
	(region::print): Delete.
	(region::dump_dot_to_pp): Delete.
	(region::dump_to_pp): Delete.
	(region::dump_child_label): Delete.
	(region::validate): Delete.
	(region::remap_svalue_ids): Delete.
	(region::remap_region_ids): Delete.
	(region::add_view): Delete.
	(region::get_view): Delete.
	(region::region): Move to region.cc.
	(region::add_to_hash): Delete.
	(region::print_fields): Delete.
	(region::non_null_p): Delete.
	(primitive_region::clone): Delete.
	(primitive_region::walk_for_canonicalization): Delete.
	(map_region::map_region): Delete.
	(map_region::compare_fields): Delete.
	(map_region::print_fields): Delete.
	(map_region::validate): Delete.
	(map_region::dump_dot_to_pp): Delete.
	(map_region::dump_child_label): Delete.
	(map_region::get_or_create): Delete.
	(map_region::get): Delete.
	(map_region::add_to_hash): Delete.
	(map_region::remap_region_ids): Delete.
	(map_region::unbind): Delete.
	(map_region::get_tree_for_child_region): Delete.
	(map_region::get_tree_for_child_region): Delete.
	(tree_cmp): Move to region.cc.
	(map_region::can_merge_p): Delete.
	(map_region::walk_for_canonicalization): Delete.
	(map_region::get_value_by_name): Delete.
	(struct_or_union_region::valid_key_p): Delete.
	(struct_or_union_region::compare_fields): Delete.
	(struct_region::clone): Delete.
	(struct_region::compare_fields): Delete.
	(union_region::clone): Delete.
	(union_region::compare_fields): Delete.
	(frame_region::compare_fields): Delete.
	(frame_region::clone): Delete.
	(frame_region::valid_key_p): Delete.
	(frame_region::print_fields): Delete.
	(frame_region::add_to_hash): Delete.
	(globals_region::compare_fields): Delete.
	(globals_region::clone): Delete.
	(globals_region::valid_key_p): Delete.
	(code_region::compare_fields): Delete.
	(code_region::clone): Delete.
	(code_region::valid_key_p): Delete.
	(array_region::array_region): Delete.
	(array_region::get_element): Delete.
	(array_region::clone): Delete.
	(array_region::compare_fields): Delete.
	(array_region::print_fields): Delete.
	(array_region::validate): Delete.
	(array_region::dump_dot_to_pp): Delete.
	(array_region::dump_child_label): Delete.
	(array_region::get_or_create): Delete.
	(array_region::get): Delete.
	(array_region::add_to_hash): Delete.
	(array_region::remap_region_ids): Delete.
	(array_region::get_key_for_child_region): Delete.
	(array_region::key_cmp): Delete.
	(array_region::walk_for_canonicalization): Delete.
	(array_region::key_from_constant): Delete.
	(array_region::constant_from_key): Delete.
	(function_region::compare_fields): Delete.
	(function_region::clone): Delete.
	(function_region::valid_key_p): Delete.
	(stack_region::stack_region): Delete.
	(stack_region::compare_fields): Delete.
	(stack_region::clone): Delete.
	(stack_region::print_fields): Delete.
	(stack_region::dump_child_label): Delete.
	(stack_region::validate): Delete.
	(stack_region::push_frame): Delete.
	(stack_region::get_current_frame_id): Delete.
	(stack_region::pop_frame): Delete.
	(stack_region::add_to_hash): Delete.
	(stack_region::remap_region_ids): Delete.
	(stack_region::can_merge_p): Delete.
	(stack_region::walk_for_canonicalization): Delete.
	(stack_region::get_value_by_name): Delete.
	(heap_region::heap_region): Delete.
	(heap_region::compare_fields): Delete.
	(heap_region::clone): Delete.
	(heap_region::walk_for_canonicalization): Delete.
	(root_region::root_region): Delete.
	(root_region::compare_fields): Delete.
	(root_region::clone): Delete.
	(root_region::print_fields): Delete.
	(root_region::validate): Delete.
	(root_region::dump_child_label): Delete.
	(root_region::push_frame): Delete.
	(root_region::get_current_frame_id): Delete.
	(root_region::pop_frame): Delete.
	(root_region::ensure_stack_region): Delete.
	(root_region::get_stack_region): Delete.
	(root_region::ensure_globals_region): Delete.
	(root_region::get_code_region): Delete.
	(root_region::ensure_code_region): Delete.
	(root_region::get_globals_region): Delete.
	(root_region::ensure_heap_region): Delete.
	(root_region::get_heap_region): Delete.
	(root_region::remap_region_ids): Delete.
	(root_region::can_merge_p): Delete.
	(root_region::add_to_hash): Delete.
	(root_region::walk_for_canonicalization): Delete.
	(root_region::get_value_by_name): Delete.
	(symbolic_region::symbolic_region): Delete.
	(symbolic_region::compare_fields): Delete.
	(symbolic_region::clone): Delete.
	(symbolic_region::walk_for_canonicalization): Delete.
	(symbolic_region::print_fields): Delete.
	(region_model::region_model): Add region_model_manager * param.
	Reimplement in terms of store, dropping impl_constraint_manager
	subclass.
	(region_model::operator=): Reimplement in terms of store
	(region_model::operator==): Likewise.
	(region_model::hash): Likewise.
	(region_model::print): Delete.
	(region_model::print_svalue): Delete.
	(region_model::dump_dot_to_pp): Delete.
	(region_model::dump_dot_to_file): Delete.
	(region_model::dump_dot): Delete.
	(region_model::dump_to_pp): Replace "summarize" param with
	"simple" and "multiline".  Port to store-based implementation.
	(region_model::dump): Replace "summarize" param with "simple" and
	"multiline".
	(dump_vec_of_tree): Delete.
	(region_model::dump_summary_of_rep_path_vars): Delete.
	(region_model::validate): Delete.
	(svalue_id_cmp_by_constant_svalue_model): Delete.
	(svalue_id_cmp_by_constant_svalue): Delete.
	(region_model::canonicalize): Drop "ctxt" param.  Reimplement in
	terms of store and constraints.
	(region_model::canonicalized_p): Remove NULL arg to canonicalize.
	(region_model::loop_replay_fixup): New.
	(poisoned_value_diagnostic::emit): Tweak wording of warnings.
	(region_model::check_for_poison): Delete.
	(region_model::get_gassign_result): New.
	(region_model::on_assignment): Port to store-based implementation.
	(region_model::on_call_pre): Delete calls to check_for_poison.
	Move implementations to region-model-impl-calls.c and port to
	store-based implementation.
	(region_model::on_call_post): Likewise.
	(class reachable_regions): Move to region-model-reachability.h/cc
	and port to store-based implementation.
	(region_model::handle_unrecognized_call): Port to store-based
	implementation.
	(region_model::get_reachable_svalues): New.
	(region_model::on_setjmp): Port to store-based implementation.
	(region_model::on_longjmp): Likewise.
	(region_model::handle_phi): Drop is_back_edge param and the logic
	using it.
	(region_model::get_lvalue_1): Port from region_id to const region *.
	(region_model::make_region_for_unexpected_tree_code): Delete.
	(assert_compat_types): If the check fails, use internal_error to
	show the types.
	(region_model::get_lvalue): Port from region_id to const region *.
	(region_model::get_rvalue_1): Port from svalue_id to const svalue *.
	(region_model::get_rvalue): Likewise.
	(region_model::get_or_create_ptr_svalue): Delete.
	(region_model::get_or_create_constant_svalue): Delete.
	(region_model::get_svalue_for_fndecl): Delete.
	(region_model::get_region_for_fndecl): Delete.
	(region_model::get_svalue_for_label): Delete.
	(region_model::get_region_for_label): Delete.
	(build_cast): Delete.
	(region_model::maybe_cast_1): Delete.
	(region_model::maybe_cast): Delete.
	(region_model::get_field_region): Delete.
	(region_model::get_store_value): New.
	(region_model::region_exists_p): New.
	(region_model::deref_rvalue): Port from svalue_id to const svalue *.
	(region_model::set_value): Likewise.
	(region_model::clobber_region): New.
	(region_model::purge_region): New.
	(region_model::zero_fill_region): New.
	(region_model::mark_region_as_unknown): New.
	(region_model::eval_condition): Port from svalue_id to
	const svalue *.
	(region_model::eval_condition_without_cm): Likewise.
	(region_model::compare_initial_and_pointer): New.
	(region_model::add_constraint): Port from svalue_id to
	const svalue *.
	(region_model::maybe_get_constant): Delete.
	(region_model::get_representative_path_var): New.
	(region_model::add_new_malloc_region): Delete.
	(region_model::get_representative_tree): Port to const svalue *.
	(region_model::get_representative_path_var): Port to
	const region *.
	(region_model::get_path_vars_for_svalue): Delete.
	(region_model::set_to_new_unknown_value): Delete.
	(region_model::update_for_phis): Don't pass is_back_edge to handle_phi.
	(region_model::update_for_call_superedge): Port from svalue_id to
	const svalue *.
	(region_model::update_for_return_superedge): Port to store-based
	implementation.
	(region_model::update_for_call_summary): Replace
	set_to_new_unknown_value with mark_region_as_unknown.
	(region_model::get_root_region): Delete.
	(region_model::get_stack_region_id): Delete.
	(region_model::push_frame): Delete.
	(region_model::get_current_frame_id): Delete.
	(region_model::get_current_function): Delete.
	(region_model::pop_frame): Delete.
	(region_model::on_top_level_param): New.
	(region_model::get_stack_depth): Delete.
	(region_model::get_function_at_depth): Delete.
	(region_model::get_globals_region_id): Delete.
	(region_model::add_svalue): Delete.
	(region_model::replace_svalue): Delete.
	(region_model::add_region): Delete.
	(region_model::get_svalue): Delete.
	(region_model::get_region): Delete.
	(make_region_for_type): Delete.
	(region_model::add_region_for_type): Delete.
	(region_model::on_top_level_param): New.
	(class restrict_to_used_svalues): Delete.
	(region_model::purge_unused_svalues): Delete.
	(region_model::push_frame): New.
	(region_model::remap_svalue_ids): Delete.
	(region_model::remap_region_ids): Delete.
	(region_model::purge_regions): Delete.
	(region_model::get_descendents): Delete.
	(region_model::delete_region_and_descendents): Delete.
	(region_model::poison_any_pointers_to_bad_regions): Delete.
	(region_model::can_merge_with_p): Delete.
	(region_model::get_current_function): New.
	(region_model::get_value_by_name): Delete.
	(region_model::convert_byte_offset_to_array_index): Delete.
	(region_model::pop_frame): New.
	(region_model::get_or_create_mem_ref): Delete.
	(region_model::get_stack_depth): New.
	(region_model::get_frame_at_index): New.
	(region_model::unbind_region_and_descendents): New.
	(struct bad_pointer_finder): New.
	(region_model::get_or_create_pointer_plus_expr): Delete.
	(region_model::poison_any_pointers_to_descendents): New.
	(region_model::get_or_create_view): Delete.
	(region_model::can_merge_with_p): New.
	(region_model::get_fndecl_for_call):  Port from svalue_id to
	const svalue *.
	(struct append_ssa_names_cb_data): New.
	(get_ssa_name_regions_for_current_frame): New.
	(region_model::append_ssa_names_cb): New.
	(model_merger::dump_to_pp): Add "simple" param.  Drop dumping of
	remappings.
	(model_merger::dump): Add "simple" param to both overloads.
	(model_merger::can_merge_values_p): Delete.
	(model_merger::record_regions): Delete.
	(model_merger::record_svalues): Delete.
	(svalue_id_merger_mapping::svalue_id_merger_mapping): Delete.
	(svalue_id_merger_mapping::dump_to_pp): Delete.
	(svalue_id_merger_mapping::dump): Delete.
	(region_model::create_region_for_heap_alloc): New.
	(region_model::create_region_for_alloca): New.
	(region_model::record_dynamic_extents): New.
	(canonicalization::canonicalization): Delete.
	(canonicalization::walk_rid): Delete.
	(canonicalization::walk_sid): Delete.
	(canonicalization::dump_to_pp): Delete.
	(canonicalization::dump): Delete.
	(inchash::add): Delete overloads for svalue_id and region_id.
	(engine::log_stats): New.
	(assert_condition): Add overload comparing svalues.
	(assert_dump_eq): Pass "true" for multiline.
	(selftest::test_dump): Update for rewrite of region_model.
	(selftest::test_dump_2): Rename to...
	(selftest::test_struct): ...this.  Provide a region_model_manager
	when creating region_model instance.  Remove dump test.  Add
	checks for get_offset.
	(selftest::test_dump_3): Rename to...
	(selftest::test_array_1): ...this.  Provide a region_model_manager
	when creating region_model instance.  Remove dump test.
	(selftest::test_get_representative_tree): Port from svalue_id to
	new API.  Add test coverage for various expressions.
	(selftest::test_unique_constants): Provide a region_model_manager
	for the region_model.  Add test coverage for comparing const vs
	non-const.
	(selftest::test_svalue_equality): Delete.
	(selftest::test_region_equality): Delete.
	(selftest::test_unique_unknowns): New.
	(class purge_all_svalue_ids): Delete.
	(class purge_one_svalue_id): Delete.
	(selftest::test_purging_by_criteria): Delete.
	(selftest::test_initial_svalue_folding): New.
	(selftest::test_unaryop_svalue_folding): New.
	(selftest::test_binop_svalue_folding): New.
	(selftest::test_sub_svalue_folding): New.
	(selftest::test_purge_unused_svalues): Delete.
	(selftest::test_descendent_of_p): New.
	(selftest::test_assignment): Provide a region_model_manager for
	the region_model.  Drop the dump test.
	(selftest::test_compound_assignment): Likewise.
	(selftest::test_stack_frames): Port to new implementation.
	(selftest::test_get_representative_path_var): Likewise.
	(selftest::test_canonicalization_1): Rename to...
	(selftest::test_equality_1): ...this.  Port to new API, and add
	(selftest::test_canonicalization_2): Provide a
	region_model_manager when creating region_model instances.
	Remove redundant canicalization.
	(selftest::test_canonicalization_3): Provide a
	region_model_manager when creating region_model instances.
	Remove param from calls to region_model::canonicalize.
	(selftest::test_canonicalization_4): Likewise.
	(selftest::assert_region_models_merge): Constify
	out_merged_svalue.  Port to new API.
	(selftest::test_state_merging): Provide a
	region_model_manager when creating region_model instances.
	Provide a program_point point when merging them.  Replace
	set_to_new_unknown_value with usage of placeholder_svalues.
	Drop get_value_by_name.  Port from svalue_id to const svalue *.
	Add test of heap allocation.
	(selftest::test_constraint_merging):  Provide a
	region_model_manager when creating region_model instances.
	Provide a program_point point when merging them.  Eliminate use
	of set_to_new_unknown_value.
	(selftest::test_widening_constraints): New.
	(selftest::test_iteration_1): New.
	(selftest::test_malloc_constraints): Port to store-based
	implementation.
	(selftest::test_var): New test.
	(selftest::test_array_2): New test.
	(selftest::test_mem_ref): New test.
	(selftest::test_POINTER_PLUS_EXPR_then_MEM_REF): New.
	(selftest::test_malloc): New.
	(selftest::test_alloca): New.
	(selftest::analyzer_region_model_cc_tests): Update for renamings.
	Call new functions.
	* region-model.h (class path_var): Move to analyzer.h.
	(class svalue_id): Delete.
	(class region_id): Delete.
	(class id_map): Delete.
	(svalue_id_map): Delete.
	(region_id_map): Delete.
	(id_map<T>::id_map): Delete.
	(id_map<T>::put): Delete.
	(id_map<T>::get_dst_for_src): Delete.
	(id_map<T>::get_src_for_dst): Delete.
	(id_map<T>::dump_to_pp): Delete.
	(id_map<T>::dump): Delete.
	(id_map<T>::update): Delete.
	(one_way_svalue_id_map): Delete.
	(one_way_region_id_map): Delete.
	(class region_id_set): Delete.
	(class svalue_id_set): Delete.
	(struct complexity): New.
	(class visitor): New.
	(enum svalue_kind): Add SK_SETJMP, SK_INITIAL, SK_UNARYOP,
	SK_BINOP, SK_SUB,SK_UNMERGEABLE, SK_PLACEHOLDER, SK_WIDENING,
	SK_COMPOUND, and SK_CONJURED.
	(svalue::operator==): Delete.
	(svalue::operator!=): Delete.
	(svalue::clone): Delete.
	(svalue::hash): Delete.
	(svalue::dump_dot_to_pp): Delete.
	(svalue::dump_to_pp): New.
	(svalue::dump): New.
	(svalue::get_desc): New.
	(svalue::dyn_cast_initial_svalue): New.
	(svalue::dyn_cast_unaryop_svalue): New.
	(svalue::dyn_cast_binop_svalue): New.
	(svalue::dyn_cast_sub_svalue): New.
	(svalue::dyn_cast_unmergeable_svalue): New.
	(svalue::dyn_cast_widening_svalue): New.
	(svalue::dyn_cast_compound_svalue): New.
	(svalue::dyn_cast_conjured_svalue): New.
	(svalue::maybe_undo_cast): New.
	(svalue::unwrap_any_unmergeable): New.
	(svalue::remap_region_ids): Delete
	(svalue::can_merge_p): New.
	(svalue::walk_for_canonicalization): Delete
	(svalue::get_complexity): New.
	(svalue::get_child_sid): Delete
	(svalue::accept): New.
	(svalue::live_p): New.
	(svalue::implicitly_live_p): New.
	(svalue::svalue): Add complexity param.
	(svalue::add_to_hash): Delete
	(svalue::print_details): Delete
	(svalue::m_complexity): New field.
	(region_svalue::key_t): New struct.
	(region_svalue::region_svalue): Port from region_id to
	const region_id *.  Add complexity.
	(region_svalue::compare_fields): Delete.
	(region_svalue::clone): Delete.
	(region_svalue::dump_dot_to_pp): Delete.
	(region_svalue::get_pointee): Port from region_id to
	const region_id *.
	(region_svalue::remap_region_ids): Delete.
	(region_svalue::merge_values): Delete.
	(region_svalue::dump_to_pp): New.
	(region_svalue::accept): New.
	(region_svalue::walk_for_canonicalization): Delete.
	(region_svalue::eval_condition): Make params const.
	(region_svalue::add_to_hash): Delete.
	(region_svalue::print_details): Delete.
	(region_svalue::m_rid): Replace with...
	(region_svalue::m_reg): ...this.
	(is_a_helper <region_svalue *>::test): Convert to...
	(is_a_helper <const region_svalue *>::test): ...this.
	(template <> struct default_hash_traits<region_svalue::key_t>):
	New.
	(constant_svalue::constant_svalue): Add complexity.
	(constant_svalue::compare_fields): Delete.
	(constant_svalue::clone): Delete.
	(constant_svalue::add_to_hash): Delete.
	(constant_svalue::dump_to_pp): New.
	(constant_svalue::accept): New.
	(constant_svalue::implicitly_live_p): New.
	(constant_svalue::merge_values): Delete.
	(constant_svalue::eval_condition): Make params const.
	(constant_svalue::get_child_sid): Delete.
	(constant_svalue::print_details): Delete.
	(is_a_helper <constant_svalue *>::test): Convert to...
	(is_a_helper <const constant_svalue *>::test): ...this.
	(class unknown_svalue): Update leading comment.
	(unknown_svalue::unknown_svalue): Add complexity.
	(unknown_svalue::compare_fields): Delete.
	(unknown_svalue::add_to_hash): Delete.
	(unknown_svalue::dyn_cast_unknown_svalue): Delete.
	(unknown_svalue::print_details): Delete.
	(unknown_svalue::dump_to_pp): New.
	(unknown_svalue::accept): New.
	(poisoned_svalue::key_t): New struct.
	(poisoned_svalue::poisoned_svalue): Add complexity.
	(poisoned_svalue::compare_fields): Delete.
	(poisoned_svalue::clone): Delete.
	(poisoned_svalue::add_to_hash): Delete.
	(poisoned_svalue::dump_to_pp): New.
	(poisoned_svalue::accept): New.
	(poisoned_svalue::print_details): Delete.
	(is_a_helper <poisoned_svalue *>::test): Convert to...
	(is_a_helper <const poisoned_svalue *>::test): ...this.
	(template <> struct default_hash_traits<poisoned_svalue::key_t>):
	New.
	(setjmp_record::add_to_hash): New.
	(setjmp_svalue::key_t): New struct.
	(setjmp_svalue::compare_fields): Delete.
	(setjmp_svalue::clone): Delete.
	(setjmp_svalue::add_to_hash): Delete.
	(setjmp_svalue::setjmp_svalue): Add complexity.
	(setjmp_svalue::dump_to_pp): New.
	(setjmp_svalue::accept): New.
	(setjmp_svalue::void print_details): Delete.
	(is_a_helper <const setjmp_svalue *>::test): New.
	(template <> struct default_hash_traits<setjmp_svalue::key_t>): New.
	(class initial_svalue : public svalue): New.
	(is_a_helper <const initial_svalue *>::test): New.
	(class unaryop_svalue): New.
	(is_a_helper <const unaryop_svalue *>::test): New.
	(template <> struct default_hash_traits<unaryop_svalue::key_t>): New.
	(class binop_svalue): New.
	(is_a_helper <const binop_svalue *>::test): New.
	(template <> struct default_hash_traits<binop_svalue::key_t>): New.
	(class sub_svalue): New.
	(is_a_helper <const sub_svalue *>::test): New.
	(template <> struct default_hash_traits<sub_svalue::key_t>): New.
	(class unmergeable_svalue): New.
	(is_a_helper <const unmergeable_svalue *>::test): New.
	(class placeholder_svalue): New.
	(is_a_helper <placeholder_svalue *>::test): New.
	(class widening_svalue): New.
	(is_a_helper <widening_svalue *>::test): New.
	(template <> struct default_hash_traits<widening_svalue::key_t>): New.
	(class compound_svalue): New.
	(is_a_helper <compound_svalue *>::test): New.
	(template <> struct default_hash_traits<compound_svalue::key_t>): New.
	(class conjured_svalue): New.
	(is_a_helper <conjured_svalue *>::test): New.
	(template <> struct default_hash_traits<conjured_svalue::key_t>): New.
	(enum region_kind): Delete RK_PRIMITIVE, RK_STRUCT, RK_UNION, and
	RK_ARRAY.  Add RK_LABEL, RK_DECL, RK_FIELD, RK_ELEMENT, RK_OFFSET,
	RK_CAST, RK_HEAP_ALLOCATED, RK_ALLOCA, RK_STRING, and RK_UNKNOWN.
	(region_kind_to_str): Delete.
	(region::~region): Move implementation to region.cc.
	(region::operator==): Delete.
	(region::operator!=): Delete.
	(region::clone): Delete.
	(region::get_id): New.
	(region::cmp_ids): New.
	(region::dyn_cast_map_region): Delete.
	(region::dyn_cast_array_region): Delete.
	(region::region_id get_parent): Delete.
	(region::get_parent_region): Convert to a simple accessor.
	(region::void set_value): Delete.
	(region::svalue_id get_value): Delete.
	(region::svalue_id get_value_direct): Delete.
	(region::svalue_id get_inherited_child_sid): Delete.
	(region::dyn_cast_frame_region): New.
	(region::dyn_cast_function_region): New.
	(region::dyn_cast_decl_region): New.
	(region::dyn_cast_field_region): New.
	(region::dyn_cast_element_region): New.
	(region::dyn_cast_offset_region): New.
	(region::dyn_cast_cast_region): New.
	(region::dyn_cast_string_region): New.
	(region::accept): New.
	(region::get_base_region): New.
	(region::base_region_p): New.
	(region::descendent_of_p): New.
	(region::maybe_get_frame_region): New.
	(region::maybe_get_decl): New.
	(region::hash): Delete.
	(region::rint): Delete.
	(region::dump_dot_to_pp): Delete.
	(region::get_desc): New.
	(region::dump_to_pp): Convert to vfunc, changing signature.
	(region::dump_child_label): Delete.
	(region::remap_svalue_ids): Delete.
	(region::remap_region_ids): Delete.
	(region::dump): New.
	(region::walk_for_canonicalization): Delete.
	(region::non_null_p): Drop region_model param.
	(region::add_view): Delete.
	(region::get_view): Delete.
	(region::get_active_view): Delete.
	(region::is_view_p): Delete.
	(region::cmp_ptrs): New.
	(region::validate): Delete.
	(region::get_offset): New.
	(region::get_byte_size): New.
	(region::get_bit_size): New.
	(region::get_subregions_for_binding): New.
	(region::region): Add complexity param.  Convert parent from
	region_id to const region *.  Drop svalue_id.  Drop copy ctor.
	(region::symbolic_for_unknown_ptr_p): New.
	(region::add_to_hash): Delete.
	(region::print_fields): Delete.
	(region::get_complexity): New accessor.
	(region::become_active_view): Delete.
	(region::deactivate_any_active_view): Delete.
	(region::deactivate_view): Delete.
	(region::calc_offset): New.
	(region::m_parent_rid): Delete.
	(region::m_sval_id): Delete.
	(region::m_complexity): New.
	(region::m_id): New.
	(region::m_parent): New.
	(region::m_view_rids): Delete.
	(region::m_is_view): Delete.
	(region::m_active_view_rid): Delete.
	(region::m_cached_offset): New.
	(is_a_helper <region *>::test): Convert to...
	(is_a_helper <const region *>::test): ... this.
	(class primitive_region): Delete.
	(class space_region): New.
	(class map_region): Delete.
	(is_a_helper <map_region *>::test): Delete.
	(class frame_region): Reimplement.
	(template <> struct default_hash_traits<frame_region::key_t>):
	New.
	(class globals_region): Reimplement.
	(is_a_helper <globals_region *>::test): Convert to...
	(is_a_helper <const globals_region *>::test): ...this.
	(class struct_or_union_region): Delete.
	(is_a_helper <struct_or_union_region *>::test): Delete.
	(class code_region): Reimplement.
	(is_a_helper <const code_region *>::test): New.
	(class struct_region): Delete.
	(is_a_helper <struct_region *>::test): Delete.
	(class function_region): Reimplement.
	(is_a_helper <function_region *>::test): Convert to...
	(is_a_helper <const function_region *>::test): ...this.
	(class union_region): Delete.
	(is_a_helper <union_region *>::test): Delete.
	(class label_region): New.
	(is_a_helper <const label_region *>::test): New.
	(class scope_region): Delete.
	(class stack_region): Reimplement.
	(is_a_helper <stack_region *>::test): Convert to...
	(is_a_helper <const stack_region *>::test): ...this.
	(class heap_region): Reimplement.
	(is_a_helper <heap_region *>::test): Convert to...
	(is_a_helper <const heap_region *>::test): ...this.
	(class root_region): Reimplement.
	(is_a_helper <root_region *>::test): Convert to...
	(is_a_helper <const root_region *>::test): ...this.
	(class symbolic_region): Reimplement.
	(is_a_helper <const symbolic_region *>::test): New.
	(template <> struct default_hash_traits<symbolic_region::key_t>):
	New.
	(class decl_region): New.
	(is_a_helper <const decl_region *>::test): New.
	(class field_region): New.
	(template <> struct default_hash_traits<field_region::key_t>): New.
	(class array_region): Delete.
	(class element_region): New.
	(is_a_helper <array_region *>::test): Delete.
	(is_a_helper <const element_region *>::test): New.
	(template <> struct default_hash_traits<element_region::key_t>):
	New.
	(class offset_region): New.
	(is_a_helper <const offset_region *>::test): New.
	(template <> struct default_hash_traits<offset_region::key_t>):
	New.
	(class cast_region): New.
	(is_a_helper <const cast_region *>::test): New.
	(template <> struct default_hash_traits<cast_region::key_t>): New.
	(class heap_allocated_region): New.
	(class alloca_region): New.
	(class string_region): New.
	(is_a_helper <const string_region *>::test): New.
	(class unknown_region): New.
	(class region_model_manager): New.
	(struct append_ssa_names_cb_data): New.
	(class call_details): New.
	(region_model::region_model): Add region_model_manager param.
	(region_model::print_svalue): Delete.
	(region_model::dump_dot_to_pp): Delete.
	(region_model::dump_dot_to_file): Delete.
	(region_model::dump_dot): Delete.
	(region_model::dump_to_pp): Drop summarize param in favor of
	simple and multiline.
	(region_model::dump): Likewise.
	(region_model::summarize_to_pp): Delete.
	(region_model::summarize): Delete.
	(region_model::void canonicalize): Drop ctxt param.
	(region_model::void check_for_poison): Delete.
	(region_model::get_gassign_result): New.
	(region_model::impl_call_alloca): New.
	(region_model::impl_call_analyzer_describe): New.
	(region_model::impl_call_analyzer_eval): New.
	(region_model::impl_call_builtin_expect): New.
	(region_model::impl_call_calloc): New.
	(region_model::impl_call_free): New.
	(region_model::impl_call_malloc): New.
	(region_model::impl_call_memset): New.
	(region_model::impl_call_strlen): New.
	(region_model::get_reachable_svalues): New.
	(region_model::handle_phi): Drop is_back_edge param.
	(region_model::region_id get_root_rid): Delete.
	(region_model::root_region *get_root_region): Delete.
	(region_model::region_id get_stack_region_id): Delete.
	(region_model::push_frame): Convert from region_id and svalue_id
	to const region * and const svalue *.
	(region_model::get_current_frame_id): Replace with...
	(region_model::get_current_frame): ...this.
	(region_model::pop_frame): Convert from region_id to
	const region *.  Drop purge and stats param.  Add out_result.
	(region_model::function *get_function_at_depth): Delete.
	(region_model::get_globals_region_id): Delete.
	(region_model::add_svalue): Delete.
	(region_model::replace_svalue): Delete.
	(region_model::add_region): Delete.
	(region_model::add_region_for_type): Delete.
	(region_model::get_svalue): Delete.
	(region_model::get_region): Delete.
	(region_model::get_lvalue): Convert from region_id to
	const region *.
	(region_model::get_rvalue): Convert from svalue_id to
	const svalue *.
	(region_model::get_or_create_ptr_svalue): Delete.
	(region_model::get_or_create_constant_svalue): Delete.
	(region_model::get_svalue_for_fndecl): Delete.
	(region_model::get_svalue_for_label): Delete.
	(region_model::get_region_for_fndecl): Delete.
	(region_model::get_region_for_label): Delete.
	(region_model::get_frame_at_index (int index) const;): New.
	(region_model::maybe_cast): Delete.
	(region_model::maybe_cast_1): Delete.
	(region_model::get_field_region): Delete.
	(region_model::id deref_rvalue): Convert from region_id and
	svalue_id to const region * and const svalue *.  Drop overload,
	passing in both a tree and an svalue.
	(region_model::set_value): Convert from region_id and svalue_id to
	const region * and const svalue *.
	(region_model::set_to_new_unknown_value): Delete.
	(region_model::clobber_region (const region *reg);): New.
	(region_model::purge_region (const region *reg);): New.
	(region_model::zero_fill_region (const region *reg);): New.
	(region_model::mark_region_as_unknown (const region *reg);): New.
	(region_model::copy_region): Convert from region_id to
	const region *.
	(region_model::eval_condition): Convert from svalue_id to
	const svalue *.
	(region_model::eval_condition_without_cm): Likewise.
	(region_model::compare_initial_and_pointer): New.
	(region_model:maybe_get_constant): Delete.
	(region_model::add_new_malloc_region): Delete.
	(region_model::get_representative_tree): Convert from svalue_id to
	const svalue *.
	(region_model::get_representative_path_var): Delete decl taking a
	region_id in favor of two decls, for svalue vs region, with an
	svalue_set to ensure termination.
	(region_model::get_path_vars_for_svalue): Delete.
	(region_model::create_region_for_heap_alloc): New.
	(region_model::create_region_for_alloca): New.
	(region_model::purge_unused_svalues): Delete.
	(region_model::remap_svalue_ids): Delete.
	(region_model::remap_region_ids): Delete.
	(region_model::purge_regions): Delete.
	(region_model::get_num_svalues): Delete.
	(region_model::get_num_regions): Delete.
	(region_model::get_descendents): Delete.
	(region_model::get_store): New.
	(region_model::delete_region_and_descendents): Delete.
	(region_model::get_manager): New.
	(region_model::unbind_region_and_descendents): New.
	(region_model::can_merge_with_p): Add point param.  Drop
	svalue_id_merger_mapping.
	(region_model::get_value_by_name): Delete.
	(region_model::convert_byte_offset_to_array_index): Delete.
	(region_model::get_or_create_mem_ref): Delete.
	(region_model::get_or_create_pointer_plus_expr): Delete.
	(region_model::get_or_create_view): Delete.
	(region_model::get_lvalue_1): Convert from region_id to
	const region *.
	(region_model::get_rvalue_1): Convert from svalue_id to
	const svalue *.
	(region_model::get_ssa_name_regions_for_current_frame): New.
	(region_model::append_ssa_names_cb): New.
	(region_model::get_store_value): New.
	(region_model::copy_struct_region): Delete.
	(region_model::copy_union_region): Delete.
	(region_model::copy_array_region): Delete.
	(region_model::region_exists_p): New.
	(region_model::make_region_for_unexpected_tree_code): Delete.
	(region_model::loop_replay_fixup): New.
	(region_model::poison_any_pointers_to_bad_regions): Delete.
	(region_model::poison_any_pointers_to_descendents): New.
	(region_model::dump_summary_of_rep_path_vars): Delete.
	(region_model::on_top_level_param): New.
	(region_model::record_dynamic_extents): New.
	(region_model::m_mgr;): New.
	(region_model::m_store;): New.
	(region_model::m_svalues;): Delete.
	(region_model::m_regions;): Delete.
	(region_model::m_root_rid;): Delete.
	(region_model::m_current_frame;): New.
	(region_model_context::remap_svalue_ids): Delete.
	(region_model_context::can_purge_p): Delete.
	(region_model_context::on_svalue_leak): New.
	(region_model_context::on_svalue_purge): Delete.
	(region_model_context::on_liveness_change): New.
	(region_model_context::on_inherited_svalue): Delete.
	(region_model_context::on_cast): Delete.
	(region_model_context::on_unknown_change): Convert from svalue_id to
	const svalue * and add is_mutable.
	(class noop_region_model_context): Update for region_model_context
	changes.
	(model_merger::model_merger): Add program_point.  Drop
	svalue_id_merger_mapping.
	(model_merger::dump_to_pp): Add "simple" param.
	(model_merger::dump): Likewise.
	(model_merger::get_region_a): Delete.
	(model_merger::get_region_b): Delete.
	(model_merger::can_merge_values_p): Delete.
	(model_merger::record_regions): Delete.
	(model_merger::record_svalues): Delete.
	(model_merger::m_point): New field.
	(model_merger::m_map_regions_from_a_to_m): Delete.
	(model_merger::m_map_regions_from_b_to_m): Delete.
	(model_merger::m_sid_mapping): Delete.
	(struct svalue_id_merger_mapping): Delete.
	(class engine): New.
	(struct canonicalization): Delete.
	(inchash::add): Delete decls for hashing svalue_id and region_id.
	(test_region_model_context::on_unexpected_tree_code): Require t to
	be non-NULL.
	(selftest::assert_condition): Add overload comparing a pair of
	const svalue *.
	* sm-file.cc: Include "tristate.h", "selftest.h",
	"analyzer/call-string.h", "analyzer/program-point.h",
	"analyzer/store.h", and "analyzer/region-model.h".
	(fileptr_state_machine::get_default_state): New.
	(fileptr_state_machine::on_stmt): Remove calls to
	get_readable_tree in favor of get_diagnostic_tree.
	* sm-malloc.cc: Include "tristate.h", "selftest.h",
	"analyzer/call-string.h", "analyzer/program-point.h",
	"analyzer/store.h", and "analyzer/region-model.h".
	(malloc_state_machine::get_default_state): New.
	(malloc_state_machine::reset_when_passed_to_unknown_fn_p): New.
	(malloc_diagnostic::describe_state_change): Handle change.m_expr
	being NULL.
	(null_arg::emit): Avoid printing "NULL '0'".
	(null_arg::describe_final_event): Avoid printing "(0) NULL".
	(malloc_leak::emit): Handle m_arg being NULL.
	(malloc_leak::describe_final_event): Handle ev.m_expr being NULL.
	(malloc_state_machine::on_stmt): Don't call get_readable_tree.
	Call get_diagnostic_tree when creating pending diagnostics.
	Update for is_zero_assignment becoming a member function of
	sm_ctxt.
	Don't transition to m_non_heap for ADDR_EXPR(MEM_REF()).
	(malloc_state_machine::reset_when_passed_to_unknown_fn_p): New
	vfunc implementation.
	* sm-sensitive.cc (sensitive_state_machine::warn_for_any_exposure): Call
	get_diagnostic_tree and pass the result to warn_for_state.
	* sm-signal.cc: Move includes of "analyzer/call-string.h" and
	"analyzer/program-point.h" to before "analyzer/region-model.h",
	and also include "analyzer/store.h" before it.
	(signal_unsafe_call::describe_state_change): Use
	get_dest_function to get handler.
	(update_model_for_signal_handler): Pass manager to region_model
	ctor.
	(register_signal_handler::impl_transition): Update for changes to
	get_or_create_node and add_edge.
	* sm-taint.cc (taint_state_machine::on_stmt): Remove calls to
	get_readable_tree, replacing them when calling warn_for_state with
	calls to get_diagnostic_tree.
	* sm.cc (is_zero_assignment): Delete.
	(any_pointer_p): Move to within namespace ana.
	* sm.h (is_zero_assignment): Remove decl.
	(any_pointer_p): Move decl to within namespace ana.
	(state_machine::get_default_state): New vfunc.
	(state_machine::reset_when_passed_to_unknown_fn_p): New vfunc.
	(sm_context::get_readable_tree): Rename to...
	(sm_context::get_diagnostic_tree): ...this.
	(sm_context::is_zero_assignment): New vfunc.
	* store.cc: New file.
	* store.h: New file.
	* svalue.cc: New file.

2020-05-22  Mark Wielaard  <mark@klomp.org>

	* sm-signal.cc(signal_unsafe_call::emit): Possibly add
	gcc_rich_location note for replacement.
	(signal_unsafe_call::get_replacement_fn): New private function.
	(get_async_signal_unsafe_fns): Add "exit".

2020-04-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94816
	* engine.cc (impl_region_model_context::on_unexpected_tree_code):
	Handle NULL tree.
	* region-model.cc (region_model::add_region_for_type): Handle
	NULL type.
	* region-model.h
	(test_region_model_context::on_unexpected_tree_code): Handle NULL
	tree.

2020-04-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94447
	PR analyzer/94639
	PR analyzer/94732
	PR analyzer/94754
	* analyzer.opt (Wanalyzer-use-of-uninitialized-value): Delete.
	* program-state.cc (selftest::test_program_state_dumping): Update
	expected dump result for removal of "uninit".
	* region-model.cc (poison_kind_to_str): Delete POISON_KIND_UNINIT
	case.
	(root_region::ensure_stack_region): Initialize stack with null
	svalue_id rather than with a typeless POISON_KIND_UNINIT value.
	(root_region::ensure_heap_region): Likewise for the heap.
	(region_model::dump_summary_of_rep_path_vars): Remove
	summarization of uninit values.
	(region_model::validate): Remove check that the stack has a
	POISON_KIND_UNINIT value.
	(poisoned_value_diagnostic::emit): Remove POISON_KIND_UNINIT
	case.
	(poisoned_value_diagnostic::describe_final_event): Likewise.
	(selftest::test_dump): Update expected dump result for removal of
	"uninit".
	(selftest::test_svalue_equality): Remove "uninit" and "freed".
	* region-model.h (enum poison_kind): Remove POISON_KIND_UNINIT.

2020-04-01  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94378
	* checker-path.cc: Include "bitmap.h".
	* constraint-manager.cc: Likewise.
	* diagnostic-manager.cc: Likewise.
	* engine.cc: Likewise.
	(exploded_node::detect_leaks): Pass null region_id to pop_frame.
	* program-point.cc: Include "bitmap.h".
	* program-state.cc: Likewise.
	* region-model.cc (id_set<region_id>::id_set): Convert to...
	(region_id_set::region_id_set): ...this.
	(svalue_id_set::svalue_id_set): New ctor.
	(region_model::copy_region): New function.
	(region_model::copy_struct_region): New function.
	(region_model::copy_union_region): New function.
	(region_model::copy_array_region): New function.
	(stack_region::pop_frame): Drop return value.  Add
	"result_dst_rid" param; if it is non-null, use copy_region to copy
	the result to it.  Rather than capture and pass a single "known
	used" return value to be used by purge_unused_values, instead
	gather and pass a set of known used return values.
	(root_region::pop_frame): Drop return value.  Add "result_dst_rid"
	param.
	(region_model::on_assignment): Use copy_region.
	(region_model::on_return): Likewise for the result.
	(region_model::on_longjmp): Pass null for pop_frame's
	result_dst_rid.
	(region_model::update_for_return_superedge): Pass the region for the
	return value of the call, if any, to pop_frame, rather than setting
	the lvalue for the lhs of the result.
	(region_model::pop_frame): Drop return value.  Add
	"result_dst_rid" param.
	(region_model::purge_unused_svalues): Convert third param from an
	svalue_id * to an svalue_id_set *, updating the initial populating
	of the "used" bitmap accordingly.  Don't remap it when done.
	(struct selftest::coord_test): New selftest fixture, extracted from...
	(selftest::test_dump_2): ...here.
	(selftest::test_compound_assignment): New selftest.
	(selftest::test_stack_frames): Pass null to new param of pop_frame.
	(selftest::analyzer_region_model_cc_tests): Call the new selftest.
	* region-model.h (class id_set): Delete template.
	(class region_id_set): Reimplement, using old id_set implementation.
	(class svalue_id_set): Likewise.  Convert from auto_sbitmap to
	auto_bitmap.
	(region::get_active_view): New accessor.
	(stack_region::pop_frame): Drop return value.  Add
	"result_dst_rid" param.
	(root_region::pop_frame): Likewise.
	(region_model::pop_frame): Likewise.
	(region_model::copy_region): New decl.
	(region_model::purge_unused_svalues): Convert third param from an
	svalue_id * to an svalue_id_set *.
	(region_model::copy_struct_region): New decl.
	(region_model::copy_union_region): New decl.
	(region_model::copy_array_region): New decl.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (selftest::test_program_state_dumping): Update
	expected dump to include symbolic_region's possibly_null field.
	* region-model.cc (symbolic_region::print_fields): New vfunc
	implementation.
	(region_model::add_constraint): Clear m_possibly_null from
	symbolic_regions now known to be non-NULL.
	(selftest::test_malloc_constraints): New selftest.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* region-model.h (region::dyn_cast_symbolic_region): Add non-const
	overload.
	(symbolic_region::dyn_cast_symbolic_region): Implement it.
	(symbolic_region::print_fields): New vfunc override decl.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class feasibility_problem): New forward decl.
	* diagnostic-manager.cc (saved_diagnostic::saved_diagnostic):
	Initialize new fields m_status, m_epath_length, and m_problem.
	(saved_diagnostic::~saved_diagnostic): Delete m_problem.
	(dedupe_candidate::dedupe_candidate): Convert "sd" param from a
	const ref to a mutable ptr.
	(dedupe_winners::add): Convert "sd" param from a const ref to a
	mutable ptr.  Record the length of the exploded_path.  Record the
	feasibility/infeasibility of sd into sd, capturing a
	feasibility_problem when feasible_p fails, and storing it in sd.
	(diagnostic_manager::emit_saved_diagnostics): Update for pass by
	ptr rather than by const ref.
	* diagnostic-manager.h (class saved_diagnostic): Add new enum
	status.  Add fields m_status, m_epath_length and m_problem.
	(saved_diagnostic::set_feasible): New member function.
	(saved_diagnostic::set_infeasible): New member function.
	(saved_diagnostic::get_feasibility_problem): New accessor.
	(saved_diagnostic::get_status): New accessor.
	(saved_diagnostic::set_epath_length): New member function.
	(saved_diagnostic::get_epath_length): New accessor.
	* engine.cc: Include "gimple-pretty-print.h".
	(exploded_path::feasible_p): Add OUT param and, if non-NULL, write
	a new feasibility_problem to it on failure.
	(viz_callgraph_node::dump_dot): Convert begin_tr calls to
	begin_trtd.  Convert end_tr calls to end_tdtr.
	(class exploded_graph_annotator): New subclass of dot_annotator.
	(impl_run_checkers): Add a second -fdump-analyzer-supergraph dump
	after the analysis runs, using exploded_graph_annotator. dumping
	to DUMP_BASE_NAME.supergraph-eg.dot.
	* exploded-graph.h (exploded_node::get_dot_fillcolor): Make
	public.
	(exploded_path::feasible_p): Add OUT param.
	(class feasibility_problem): New class.
	* state-purge.cc (state_purge_annotator::add_node_annotations):
	Return a bool, add a "within_table" param.
	(print_vec_of_names): Convert begin_tr calls to begin_trtd.
	Convert end_tr calls to end_tdtr.
	(state_purge_annotator::add_stmt_annotations): Add "within_row"
	param.
	* state-purge.h ((state_purge_annotator::add_node_annotations):
	Return a bool, add a "within_table" param.
	(state_purge_annotator::add_stmt_annotations): Add "within_row"
	param.
	* supergraph.cc (supernode::dump_dot): Call add_node_annotations
	twice: as before, passing false for "within_table", then again
	with true when within the TABLE element.  Convert some begin_tr
	calls to begin_trtd, and some end_tr calls to end_tdtr.
	Repeat each add_stmt_annotations call, distinguishing between
	calls that add TRs and those that add TDs to an existing TR.
	Add a call to add_after_node_annotations.
	* supergraph.h (dot_annotator::add_node_annotations): Add a
	"within_table" param.
	(dot_annotator::add_stmt_annotations): Add a "within_row" param.
	(dot_annotator::add_after_node_annotations): New vfunc.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (dedupe_winners::add): Show the
	exploded_node index in the log messages.
	(diagnostic_manager::emit_saved_diagnostics): Log a summary of
	m_saved_diagnostics at entry.

2020-03-27  David Malcolm  <dmalcolm@redhat.com>

	* supergraph.cc (superedge::dump): Add space before description;
	move newline to non-pretty_printer overload.

2020-03-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc: Include "stor-layout.h".
	(region_model::dump_to_pp): Rather than calling
	dump_summary_of_map on each of the current frame and the globals,
	instead get a vec of representative path_vars for all regions,
	and then dump a summary of all of them.
	(region_model::dump_summary_of_map): Delete, rewriting into...
	(region_model::dump_summary_of_rep_path_vars): ...this new
	function, working on a vec of path_vars.
	(region_model::set_value): New overload.
	(region_model::get_representative_path_var): Rename
	"parent_region" local to "parent_reg" and consolidate with other
	local.  Guard test for grandparent being stack on parent_reg being
	non-NULL.  Move handling for parent being an array_region to
	within guard for parent_reg being non-NULL.
	(selftest::make_test_compound_type): New function.
	(selftest::test_dump_2): New selftest.
	(selftest::test_dump_3): New selftest.
	(selftest::test_stack_frames): Update expected output from
	simplified dump to show "a" and "b" from parent frame and "y" in
	child frame.
	(selftest::analyzer_region_model_cc_tests): Call test_dump_2 and
	test_dump_3.
	* region-model.h (region_model::set_value): New overload decl.
	(region_model::dump_summary_of_map): Delete.
	(region_model::dump_summary_of_rep_path_vars): New.

2020-03-18  David Malcolm  <dmalcolm@redhat.com>

	* region-model.h (class noop_region_model_context): New subclass
	of region_model_context.
	(class tentative_region_model_context): Inherit from
	noop_region_model_context rather than from region_model_context;
	drop redundant vfunc implementations.
	(class test_region_model_context): Likewise.

2020-03-18  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::exploded_node): Move implementation
	here from header; accept point_and_state by const reference rather
	than by value.
	* exploded-graph.h (exploded_node::exploded_node): Pass
	point_and_state by const reference rather than by value.  Move
	body to engine.cc.

2020-03-18  Jakub Jelinek  <jakub@redhat.com>

	* sm-malloc.cc (malloc_state_machine::on_stmt): Fix up duplicated word
	issue in a comment.
	* region-model.cc (region_model::make_region_for_unexpected_tree_code,
	region_model::delete_region_and_descendents): Likewise.
	* engine.cc (class exploded_cluster): Likewise.
	* diagnostic-manager.cc (class path_builder): Likewise.

2020-03-13  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/94099
	PR analyzer/94105
	* diagnostic-manager.cc (for_each_state_change): Bulletproof
	against errors in get_rvalue by passing a
	tentative_region_model_context and rejecting if there's an error.
	* region-model.cc (region_model::get_lvalue_1): When handling
	ARRAY_REF, handle results of error-handling.  Handle NOP_EXPR.

2020-03-06  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (class array_region): New forward decl.
	* program-state.cc (selftest::test_program_state_dumping_2): New.
	(selftest::analyzer_program_state_cc_tests): Call it.
	* region-model.cc (array_region::constant_from_key): New.
	(region_model::get_representative_tree): Handle region_svalue by
	generating an ADDR_EXPR.
	(region_model::get_representative_path_var): In view handling,
	remove erroneous TREE_TYPE when determining the type of the tree.
	Handle array regions and STRING_CST.
	(selftest::assert_dump_tree_eq): New.
	(ASSERT_DUMP_TREE_EQ): New macro.
	(selftest::test_get_representative_tree): New selftest.
	(selftest::analyzer_region_model_cc_tests): Call it.
	* region-model.h (region::dyn_cast_array_region): New vfunc.
	(array_region::dyn_cast_array_region): New vfunc implementation.
	(array_region::constant_from_key): New decl.

2020-03-06  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (dump_quoted_tree): New decl.
	* engine.cc (exploded_node::dump_dot): Pass region model to
	sm_state_map::print.
	* program-state.cc: Include diagnostic-core.h.
	(sm_state_map::print): Add "model" param and use it to print
	representative trees.  Only print origin information if non-null.
	(sm_state_map::dump): Pass NULL for model to print call.
	(program_state::print): Pass region model to sm_state_map::print.
	(program_state::dump_to_pp): Use spaces rather than newlines when
	summarizing.  Pass region_model to sm_state_map::print.
	(ana::selftest::assert_dump_eq): New function.
	(ASSERT_DUMP_EQ): New macro.
	(ana::selftest::test_program_state_dumping): New function.
	(ana::selftest::analyzer_program_state_cc_tests): Call it.
	* program-state.h (program_state::print): Add model param.
	* region-model.cc (dump_quoted_tree): New function.
	(map_region::print_fields): Use dump_quoted_tree rather than
	%qE to avoid lang-dependent output.
	(map_region::dump_child_label): Likewise.
	(region_model::dump_summary_of_map): For SK_REGION, when
	get_representative_path_var fails, print the region id rather than
	erroneously printing NULL.
	* sm.cc (state_machine::get_state_by_name): New function.
	* sm.h (state_machine::get_state_by_name): New decl.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region::validate): Convert model param from ptr
	to reference.  Update comment to reflect that it's now a vfunc.
	(map_region::validate): New vfunc implementation.
	(array_region::validate): New vfunc implementation.
	(stack_region::validate): New vfunc implementation.
	(root_region::validate): New vfunc implementation.
	(region_model::validate): Pass a reference rather than a pointer
	to the region::validate vfunc.
	* region-model.h (region::validate): Make virtual.  Convert model
	param from ptr to reference.
	(map_region::validate): New vfunc decl.
	(array_region::validate): New vfunc decl.
	(stack_region::validate): New vfunc decl.
	(root_region::validate): New vfunc decl.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93993
	* region-model.cc (region_model::on_call_pre): Handle
	BUILT_IN_EXPECT and its variants.
	(region_model::add_any_constraints_from_ssa_def_stmt): Split out
	gassign handling into add_any_constraints_from_gassign; add gcall
	handling.
	(region_model::add_any_constraints_from_gassign): New function,
	based on the above.  Add handling for NOP_EXPR.
	(region_model::add_any_constraints_from_gcall): New function.
	(region_model::get_representative_path_var): Handle views.
	* region-model.h
	(region_model::add_any_constraints_from_ssa_def_stmt): New decl.
	(region_model::add_any_constraints_from_gassign): New decl.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93993
	* checker-path.h (state_change_event::get_lvalue): Add ctxt param
	and pass it to region_model::get_value call.
	* diagnostic-manager.cc (get_any_origin): Pass a
	tentative_region_model_context to the calls to get_lvalue and reject
	the comparison if errors occur.
	(can_be_expr_of_interest_p): New function.
	(diagnostic_manager::prune_for_sm_diagnostic): Replace checks for
	CONSTANT_CLASS_P with calls to update_for_unsuitable_sm_exprs.
	Pass a tentative_region_model_context to the calls to
	state_change_event::get_lvalue and reject the comparison if errors
	occur.
	(diagnostic_manager::update_for_unsuitable_sm_exprs): New.
	* diagnostic-manager.h
	(diagnostic_manager::update_for_unsuitable_sm_exprs): New decl.
	* region-model.h (class tentative_region_model_context): New class.

2020-03-04  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (worklist::worklist): Remove unused field m_eg.
	(class viz_callgraph_edge): Remove unused field m_call_sedge.
	(class viz_callgraph): Remove unused field m_sg.
	* exploded-graph.h (worklist::::m_eg): Remove unused field.

2020-03-02  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.opt (fanalyzer-show-duplicate-count): New option.
	* diagnostic-manager.cc
	(diagnostic_manager::emit_saved_diagnostic): Use the above to
	guard the printing of the duplicate count.

2020-03-02  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93959
	* analyzer.cc (is_std_function_p): New function.
	(is_std_named_call_p): New functions.
	* analyzer.h (is_std_named_call_p): New decl.
	* sm-malloc.cc (malloc_state_machine::on_stmt): Check for "std::"
	variants when checking for malloc, calloc and free.

2020-02-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93950
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Assert that var is
	either NULL or not a constant.  When updating var, bulletproof
	against constant values.

2020-02-26  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93947
	* region-model.cc (region_model::get_fndecl_for_call): Gracefully
	fail for fn_decls that don't have a cgraph_node.

2020-02-26  David Malcolm  <dmalcolm@redhat.com>

	* bar-chart.cc: New file.
	* bar-chart.h: New file.
	* engine.cc: Include "analyzer/bar-chart.h".
	(stats::log): Only log the m_num_nodes kinds that are non-zero.
	(stats::dump): Likewise when dumping.
	(stats::get_total_enodes): New.
	(exploded_graph::get_or_create_node): Increment the per-point-data
	m_excess_enodes when hitting the per-program-point limit on
	enodes.
	(exploded_graph::print_bar_charts): New.
	(exploded_graph::log_stats): Log the number of unprocessed enodes
	in the worklist.  Call print_bar_charts.
	(exploded_graph::dump_stats): Print the number of unprocessed
	enodes in the worklist.
	* exploded-graph.h (stats::get_total_enodes): New decl.
	(struct per_program_point_data): Add field m_excess_enodes.
	(exploded_graph::print_bar_charts): New decl.
	* supergraph.cc (superedge::dump): New.
	(superedge::dump): New.
	* supergraph.h (supernode::get_function): New.
	(superedge::dump): New decl.
	(superedge::dump): New decl.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_graph::get_or_create_node): Dump the
	program_state to the pp, rather than to stderr.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93032
	* sm.cc (make_checkers): Require the "taint" checker to be
	explicitly enabled.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93899
	* engine.cc
	(impl_region_model_context::impl_region_model_context): Add logger
	param.
	* engine.cc (exploded_graph::add_function_entry): Create an
	impl_region_model_context and pass it to the push_frame call.
	Bail if the resulting state is invalid.
	(exploded_graph::build_initial_worklist): Likewise.
	(exploded_graph::build_initial_worklist): Handle the case where
	add_function_entry fails.
	* exploded-graph.h
	(impl_region_model_context::impl_region_model_context): Add logger
	param.
	* region-model.cc (map_region::get_or_create): Add ctxt param and
	pass it to add_region_for_type.
	(map_region::can_merge_p): Pass NULL as a ctxt to call to
	get_or_create.
	(array_region::get_element): Pass ctxt to call to get_or_create.
	(array_region::get_or_create): Add ctxt param and pass it to
	add_region_for_type.
	(root_region::push_frame): Pass ctxt to get_or_create calls.
	(region_model::get_lvalue_1): Likewise.
	(region_model::make_region_for_unexpected_tree_code): Assert that
	ctxt is non-NULL.
	(region_model::get_rvalue_1): Pass ctxt to get_svalue_for_fndecl
	and get_svalue_for_label calls.
	(region_model::get_svalue_for_fndecl): Add ctxt param and pass it
	to get_region_for_fndecl.
	(region_model::get_region_for_fndecl): Add ctxt param and pass it
	to get_or_create.
	(region_model::get_svalue_for_label): Add ctxt param and pass it
	to get_region_for_label.
	(region_model::get_region_for_label): Add ctxt param and pass it
	to get_region_for_fndecl and get_or_create.
	(region_model::get_field_region): Add ctxt param and pass it to
	get_or_create_view and get_or_create.
	(make_region_for_type): Replace gcc_unreachable with return NULL.
	(region_model::add_region_for_type): Add ctxt param.  Handle a
	return of NULL from make_region_for_type by calling
	make_region_for_unexpected_tree_code.
	(region_model::get_or_create_mem_ref): Pass ctxt to calls to
	get_or_create_view.
	(region_model::get_or_create_view): Add ctxt param and pass it to
	add_region_for_type.
	(selftest::test_state_merging): Pass ctxt to get_or_create_view.
	* region-model.h (region_model::get_or_create): Add ctxt param.
	(region_model::add_region_for_type): Likewise.
	(region_model::get_svalue_for_fndecl): Likewise.
	(region_model::get_svalue_for_label): Likewise.
	(region_model::get_region_for_fndecl): Likewise.
	(region_model::get_region_for_label): Likewise.
	(region_model::get_field_region): Likewise.
	(region_model::get_or_create_view): Likewise.

2020-02-24  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.cc (superedge_event::should_filter_p): Update
	filter for empty descriptions to cover verbosity level 3 as well
	as 2.
	* diagnostic-manager.cc: Include "analyzer/reachability.h".
	(class path_builder): New class.
	(diagnostic_manager::emit_saved_diagnostic): Create a path_builder
	and pass it to build_emission_path, rather passing eg; similarly
	for add_events_for_eedge and ext_state.
	(diagnostic_manager::build_emission_path): Replace "eg" param
	with a path_builder, pass it to add_events_for_eedge.
	(diagnostic_manager::add_events_for_eedge): Replace ext_state
	param with path_builder; pass it to add_events_for_superedge.
	(diagnostic_manager::significant_edge_p): New.
	(diagnostic_manager::add_events_for_superedge): Add path_builder
	param.  Reject insignificant edges at verbosity levels below 3.
	(diagnostic_manager::prune_for_sm_diagnostic): Update highest
	verbosity level to 4.
	* diagnostic-manager.h (class path_builder): New forward decl.
	(diagnostic_manager::build_emission_path): Replace "eg" param
	with a path_builder.
	(diagnostic_manager::add_events_for_eedge): Replace ext_state
	param with path_builder.
	(diagnostic_manager::significant_edge_p): New.
	(diagnostic_manager::add_events_for_superedge): Add path_builder
	param.
	* reachability.h: New file.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93692
	* analyzer.opt (fdump-analyzer-callgraph): Rewrite description.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93777
	* region-model.cc (region_model::maybe_cast_1): Replace assertion
	that build_cast returns non-NULL with a conditional, falling
	through to the logic which returns a new unknown value of the
	desired type if it fails.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93778
	* engine.cc (impl_region_model_context::on_unknown_tree_code):
	Rename to...
	(impl_region_model_context::on_unexpected_tree_code): ...this and
	convert first argument from path_var to tree.
	(exploded_node::on_stmt): Pass ctxt to purge_for_unknown_fncall.
	* exploded-graph.h (region_model_context::on_unknown_tree_code):
	Rename to...
	(region_model_context::on_unexpected_tree_code): ...this and
	convert first argument from path_var to tree.
	* program-state.cc (sm_state_map::purge_for_unknown_fncall): Add
	ctxt param and pass on to calls to get_rvalue.
	* program-state.h (sm_state_map::purge_for_unknown_fncall): Add
	ctxt param.
	* region-model.cc (region_model::handle_unrecognized_call): Pass
	ctxt on to call to get_rvalue.
	(region_model::get_lvalue_1): Move body of default case to
	region_model::make_region_for_unexpected_tree_code and call it.
	Within COMPONENT_REF case, reject attempts to handle types other
	than RECORD_TYPE and UNION_TYPE.
	(region_model::make_region_for_unexpected_tree_code): New
	function, based on default case of region_model::get_lvalue_1.
	* region-model.h
	(region_model::make_region_for_unexpected_tree_code): New decl.
	(region_model::on_unknown_tree_code): Rename to...
	(region_model::on_unexpected_tree_code): ...this and convert first
	argument from path_var to tree.
	(class test_region_model_context): Update vfunc implementation for
	above change.

2020-02-18  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93774
	* region-model.cc
	(region_model::convert_byte_offset_to_array_index): Use
	int_size_in_bytes before calling size_in_bytes, to gracefully fail
	on incomplete types.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93775
	* region-model.cc (region_model::get_fndecl_for_call): Handle the
	case where the code_region's get_tree_for_child_region returns
	NULL.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93388
	* engine.cc (impl_region_model_context::on_unknown_tree_code):
	New.
	(exploded_graph::get_or_create_node): Reject invalid states.
	* exploded-graph.h
	(impl_region_model_context::on_unknown_tree_code): New decl.
	(point_and_state::point_and_state): Assert that the state is
	valid.
	* program-state.cc (program_state::program_state): Initialize
	m_valid to true.
	(program_state::operator=): Copy m_valid.
	(program_state::program_state): Likewise for move constructor.
	(program_state::print): Print m_valid.
	(program_state::dump_to_pp): Likewise.
	* program-state.h (program_state::m_valid): New field.
	* region-model.cc (region_model::get_lvalue_1): Implement the
	default case by returning a new symbolic region and calling
	the context's on_unknown_tree_code, rather than issuing an
	internal_error.  Implement VIEW_CONVERT_EXPR.
	* region-model.h (region_model_context::on_unknown_tree_code): New
	vfunc.
	(test_region_model_context::on_unknown_tree_code): New.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	* sm-malloc.cc (malloc_diagnostic::describe_state_change): For
	transition to the "null" state, only say "assuming" when
	transitioning from the "unchecked" state.

2020-02-17  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.h (diagnostic_manager::get_saved_diagnostic):
	Add const overload.
	* engine.cc (exploded_node::dump_dot): Dump saved_diagnostics.
	* exploded-graph.h (exploded_graph::get_diagnostic_manager): Add
	const overload.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93288
	* analysis-plan.cc (analysis_plan::use_summary_p): Look through
	the ultimate_alias_target when getting the called function.
	* engine.cc (exploded_node::on_stmt): Rename second "ctxt" to
	"sm_ctxt".  Use the region_model's get_fndecl_for_call rather than
	gimple_call_fndecl.
	* region-model.cc (region_model::get_fndecl_for_call): Use
	ultimate_alias_target on fndecl.
	* supergraph.cc (get_ultimate_function_for_cgraph_edge): New
	function.
	(supergraph_call_edge): Use it when rejecting edges without
	functions.
	(supergraph::supergraph): Use it to get the function for the
	cgraph_edge when building interprocedural superedges.
	(callgraph_superedge::get_callee_function):  Use it.
	* supergraph.h (supergraph::get_num_snodes): Make param const.
	(supergraph::function_to_num_snodes_t): Make first type param
	const.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93374
	* engine.cc (exploded_edge::exploded_edge): Add ext_state param
	and pass it to change.validate.
	(exploded_graph::get_or_create_node): Move purging of change
	svalues to also cover the case of reusing an existing enode.
	(exploded_graph::add_edge): Pass m_ext_state to exploded_edge's
	ctor.
	* exploded-graph.h (exploded_edge::exploded_edge): Add ext_state
	param.
	* program-state.cc (state_change::sm_change::validate): Likewise.
	Assert that m_sm_idx is sane.  Use ext_state to validate
	m_old_state and m_new_state.
	(state_change::validate): Add ext_state param and pass it to
	the sm_change validate calls.
	* program-state.h (state_change::sm_change::validate): Add
	ext_state param.
	(state_change::validate): Likewise.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93669
	* engine.cc (exploded_graph::dump_exploded_nodes): Handle missing
	case of STATUS_WORKLIST in implementation of
	"__analyzer_dump_exploded_nodes".

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93649
	* constraint-manager.cc (constraint_manager::add_constraint): When
	merging equivalence classes and updating m_constant, also update
	m_cst_sid.
	(constraint_manager::validate): If m_constant is non-NULL assert
	that m_cst_sid is non-null and is valid.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93657
	* analyzer.opt (fdump-analyzer): Reword description.
	(fdump-analyzer-stderr): Likewise.

2020-02-11  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (print_quoted_type): New function.
	(svalue::print): Use it to replace %qT.
	(region::dump_to_pp): Likewise.
	(region::dump_child_label): Likewise.
	(region::print_fields): Likewise.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93659
	* analyzer.opt (-param=analyzer-max-recursion-depth=): Fix "tha"
	-> "that" typo.
	(Wanalyzer-use-of-uninitialized-value): Fix "initialized" ->
	"uninitialized" typo.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93350
	* region-model.cc (region_model::get_lvalue_1):
	Handle BIT_FIELD_REF.
	(make_region_for_type): Handle VECTOR_TYPE.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93647
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Bulletproof against
	VAR being constant.
	* region-model.cc (region_model::get_lvalue_1): Provide a better
	error message when encountering an unhandled tree code.

2020-02-10  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93405
	* region-model.cc (region_model::get_lvalue_1): Implement
	CONST_DECL.

2020-02-06  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (region_model::maybe_cast_1): Attempt to provide
	a region_svalue if either type is a pointer, rather than if both
	types are pointers.

2020-02-05  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (exploded_node::dump_dot): Show merger enodes.
	(worklist::add_node): Assert that the node's m_status is
	STATUS_WORKLIST.
	(exploded_graph::process_worklist): Likewise for nodes from the
	worklist.  Set status of merged nodes to STATUS_MERGER.
	(exploded_graph::process_node): Set status of node to
	STATUS_PROCESSED.
	(exploded_graph::dump_exploded_nodes): Rework handling of
	"__analyzer_dump_exploded_nodes", splitting enodes by status into
	"processed" and "merger", showing the count of just the processed
	enodes at the call, rather than the count of all enodes.
	* exploded-graph.h (exploded_node::status): New enum.
	(exploded_node::exploded_node): Initialize m_status to
	STATUS_WORKLIST.
	(exploded_node::get_status): New getter.
	(exploded_node::set_status): New setter.

2020-02-04  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93543
	* engine.cc (pod_hash_traits<function_call_string>::mark_empty):
	Eliminate reinterpret_cast.
	(pod_hash_traits<function_call_string>::is_empty): Likewise.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	* constraint-manager.cc (range::constrained_to_single_element):
	Replace fold_build2 with fold_binary.  Remove unnecessary newline.
	(constraint_manager::get_or_add_equiv_class): Replace fold_build2
	with fold_binary in two places, and remove out-of-date comment.
	(constraint_manager::eval_condition): Replace fold_build2 with
	fold_binary.
	* region-model.cc (constant_svalue::eval_condition): Likewise.
	(region_model::on_assignment): Likewise.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93544
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Bulletproof
	against bad choices due to bad paths.
	* engine.cc (impl_region_model_context::on_phi): New.
	* exploded-graph.h (impl_region_model_context::on_phi): New decl.
	* region-model.cc (region_model::on_longjmp): Likewise.
	(region_model::handle_phi): Add phi param.  Call the ctxt's on_phi
	vfunc.
	(region_model::update_for_phis): Pass phi to handle_phi.
	* region-model.h (region_model::handle_phi): Add phi param.
	(region_model_context::on_phi): New vfunc.
	(test_region_model_context::on_phi): New.
	* sm-malloc.cc (malloc_state_machine::on_phi): New.
	(malloc_state_machine::on_zero_assignment): New.
	* sm.h (state_machine::on_phi): New vfunc.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (supernode_cluster::dump_dot): Show BB index as
	well as SN index.
	* supergraph.cc (supernode::dump_dot): Likewise.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93546
	* region-model.cc (region_model::on_call_pre): Update for new
	param of symbolic_region ctor.
	(region_model::deref_rvalue): Likewise.
	(region_model::add_new_malloc_region): Likewise.
	(make_region_for_type): Likewise, preserving type.
	* region-model.h (symbolic_region::symbolic_region): Add "type"
	param and pass it to base class ctor.

2020-02-03  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93547
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Ensure types are
	compatible before comparing constants.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93457
	* region-model.cc (make_region_for_type): Use VOID_TYPE_P rather
	than checking against void_type_node.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93373
	* region-model.cc (ASSERT_COMPAT_TYPES): Convert to...
	(assert_compat_types): ...this, and bail when either type is NULL,
	or when VOID_TYPE_P (dst_type).
	(region_model::get_lvalue): Update for above conversion.
	(region_model::get_rvalue): Likewise.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93379
	* region-model.cc (region_model::update_for_return_superedge):
	Move check for null result so that it also guards setting the
	lhs.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93438
	* region-model.cc (stack_region::can_merge_p): Split into a two
	pass approach, creating all stack regions first, then populating
	them.
	(selftest::test_state_merging): Add test coverage for (a) the case
	of self-merging a model in which a local in an older stack frame
	points to a local in a more recent stack frame (which previously
	would ICE), and (b) the case of self-merging a model in which a
	local points to a global (which previously worked OK).

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.cc (is_named_call_p): Replace tests for fndecl being
	extern at file scope and having a non-NULL DECL_NAME with a call
	to maybe_special_function_p.
	* function-set.cc (function_set::contains_decl_p): Add call to
	maybe_special_function_p.

2020-01-31  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93450
	* constraint-manager.cc
	(constraint_manager::get_or_add_equiv_class): Only compare constants
	if their types are compatible.
	* region-model.cc (constant_svalue::eval_condition): Replace check
	for identical types with call to types_compatible_p.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (extrinsic_state::dump_to_pp): New.
	(extrinsic_state::dump_to_file): New.
	(extrinsic_state::dump): New.
	* program-state.h (extrinsic_state::dump_to_pp): New decl.
	(extrinsic_state::dump_to_file): New decl.
	(extrinsic_state::dump): New decl.
	* sm.cc: Include "pretty-print.h".
	(state_machine::dump_to_pp): New.
	* sm.h (state_machine::dump_to_pp): New decl.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (for_each_state_change): Use
	extrinsic_state::get_num_checkers rather than accessing m_checkers
	directly.
	* program-state.cc (program_state::program_state): Likewise.
	* program-state.h (extrinsic_state::m_checkers): Make private.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93356
	* region-model.cc (region_model::eval_condition): In both
	overloads, bail out immediately on floating-point types.
	(region_model::eval_condition_without_cm): Likewise.
	(region_model::add_constraint): Likewise.

2020-01-30  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93450
	* program-state.cc (sm_state_map::set_state): For the overload
	taking an svalue_id, bail out if the set_state on the ec does
	nothing.  Convert the latter's return type from void to bool,
	returning true if anything changed.
	(sm_state_map::impl_set_state): Convert the return type from void
	to bool, returning true if the state changed.
	* program-state.h (sm_state_map::set_state): Convert return type
	from void to bool.
	(sm_state_map::impl_set_state): Likewise.
	* region-model.cc (constant_svalue::eval_condition): Only call
	fold_build2 if the types are the same.

2020-01-29  Jakub Jelinek  <jakub@redhat.com>

	* analyzer.h (PUSH_IGNORE_WFORMAT, POP_IGNORE_WFORMAT): Remove.
	* constraint-manager.cc: Include diagnostic-core.h before graphviz.h.
	(range::dump, equiv_class::print): Don't use PUSH_IGNORE_WFORMAT or
	POP_IGNORE_WFORMAT.
	* state-purge.cc: Include diagnostic-core.h before
	gimple-pretty-print.h.
	(state_purge_annotator::add_node_annotations, print_vec_of_names):
	Don't use PUSH_IGNORE_WFORMAT or POP_IGNORE_WFORMAT.
	* region-model.cc: Move diagnostic-core.h include before graphviz.h.
	(path_var::dump, svalue::print, constant_svalue::print_details,
	region::dump_to_pp, region::dump_child_label, region::print_fields,
	map_region::print_fields, map_region::dump_dot_to_pp,
	map_region::dump_child_label, array_region::print_fields,
	array_region::dump_dot_to_pp): Don't use PUSH_IGNORE_WFORMAT or
	POP_IGNORE_WFORMAT.

2020-01-28  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93316
	* engine.cc (rewind_info_t::update_model): Get the longjmp call
	stmt via get_longjmp_call () rather than assuming it is the last
	stmt in the longjmp's supernode.
	(rewind_info_t::add_events_to_path): Get the location_t for the
	rewind_from_longjmp_event via get_longjmp_call () rather than from
	the supernode's get_end_location ().

2020-01-28  David Malcolm  <dmalcolm@redhat.com>

	* region-model.cc (poisoned_value_diagnostic::emit): Update for
	renaming of warning_at overload to warning_meta.
	* sm-file.cc (file_leak::emit): Likewise.
	* sm-malloc.cc (double_free::emit): Likewise.
	(possible_null_deref::emit): Likewise.
	(possible_null_arg::emit): Likewise.
	(null_deref::emit): Likewise.
	(null_arg::emit): Likewise.
	(use_after_free::emit): Likewise.
	(malloc_leak::emit): Likewise.
	(free_of_non_heap::emit): Likewise.
	* sm-sensitive.cc (exposure_through_output_file::emit): Likewise.
	* sm-signal.cc (signal_unsafe_call::emit): Likewise.
	* sm-taint.cc (tainted_array_index::emit): Likewise.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93451
	* region-model.cc (tree_cmp): For the REAL_CST case, impose an
	arbitrary order on NaNs relative to other NaNs and to non-NaNs;
	const-correctness tweak.
	(ana::selftests::build_real_cst_from_string): New function.
	(ana::selftests::append_interesting_constants): New function.
	(ana::selftests::test_tree_cmp_on_constants): New test.
	(ana::selftests::test_canonicalization_4): New test.
	(ana::selftests::analyzer_region_model_cc_tests): Call the new
	tests.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93349
	* engine.cc (run_checkers): Save and restore input_location.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	* call-string.cc (call_string::cmp_1): Delete, moving body to...
	(call_string::cmp): ...here.
	* call-string.h (call_string::cmp_1): Delete decl.
	* engine.cc (worklist::key_t::cmp_1): Delete, moving body to...
	(worklist::key_t::cmp): ...here.  Implement hash comparisons
	via comparison rather than subtraction to avoid overflow issues.
	* exploded-graph.h (worklist::key_t::cmp_1): Delete decl.
	* region-model.cc (tree_cmp): Eliminate buggy checking for
	symmetry.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.cc  (is_named_call_p): Check that fndecl is "extern"
	and at file scope.  Potentially disregard prefix _ or __ in
	fndecl's name.  Bail if the identifier is NULL.
	(is_setjmp_call_p): Expect a gcall rather than plain gimple.
	Remove special-case check for leading prefix, and also check for
	sigsetjmp.
	(is_longjmp_call_p): Also check for siglongjmp.
	(get_user_facing_name): New function.
	* analyzer.h (is_setjmp_call_p): Expect a gcall rather than plain
	gimple.
	(get_user_facing_name): New decl.
	* checker-path.cc (setjmp_event::get_desc): Use
	get_user_facing_name to avoid hardcoding the function name.
	(rewind_event::rewind_event): Add rewind_info param, using it to
	initialize new m_rewind_info field, and strengthen the assertion.
	(rewind_from_longjmp_event::get_desc): Use get_user_facing_name to
	avoid hardcoding the function name.
	(rewind_to_setjmp_event::get_desc): Likewise.
	* checker-path.h (setjmp_event::setjmp_event): Add setjmp_call
	param and use it to initialize...
	(setjmp_event::m_setjmp_call): New field.
	(rewind_event::rewind_event): Add rewind_info param.
	(rewind_event::m_rewind_info): New protected field.
	(rewind_from_longjmp_event::rewind_from_longjmp_event): Add
	rewind_info param.
	(class rewind_to_setjmp_event): Move rewind_info field to parent
	class.
	* diagnostic-manager.cc (diagnostic_manager::add_events_for_eedge):
	Update setjmp-handling for is_setjmp_call_p requiring a gcall;
	pass the call to the new setjmp_event.
	* engine.cc (exploded_node::on_stmt): Update for is_setjmp_call_p
	requiring a gcall.
	(stale_jmp_buf::emit): Use get_user_facing_name to avoid
	hardcoding the function names.
	(exploded_node::on_longjmp): Pass the longjmp_call when
	constructing rewind_info.
	(rewind_info_t::add_events_to_path): Pass the rewind_info_t to the
	rewind_from_longjmp_event's ctor.
	* exploded-graph.h (rewind_info_t::rewind_info_t): Add
	longjmp_call param.
	(rewind_info_t::get_longjmp_call): New.
	(rewind_info_t::m_longjmp_call): New.
	* region-model.cc (region_model::on_setjmp): Update comment to
	indicate this is also for sigsetjmp.
	* region-model.h (struct setjmp_record): Likewise.
	(class setjmp_svalue): Likewise.

2020-01-27  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93276
	* analyzer.h (PUSH_IGNORE_WFORMAT, POP_IGNORE_WFORMAT): Guard these
	macros with GCC_VERSION >= 4006, making them no-op otherwise.
	* engine.cc (exploded_edge::exploded_edge): Specify template for
	base class initializer.
	(exploded_graph::add_edge): Specify template when chaining up to
	base class add_edge implementation.
	(viz_callgraph_node::dump_dot): Drop redundant "typename".
	(viz_callgraph_edge::viz_callgraph_edge): Specify template for
	base class initializer.
	* program-state.cc (sm_state_map::clone_with_remapping): Drop
	redundant "typename".
	(sm_state_map::print): Likewise.
	(sm_state_map::hash): Likewise.
	(sm_state_map::operator==): Likewise.
	(sm_state_map::remap_svalue_ids): Likewise.
	(sm_state_map::on_svalue_purge): Likewise.
	(sm_state_map::validate): Likewise.
	* program-state.h (sm_state_map::iterator_t): Likewise.
	* supergraph.h (superedge::superedge): Specify template for base
	class initializer.

2020-01-23  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93375
	* supergraph.cc (callgraph_superedge::get_arg_for_parm): Fail
	gracefully is the number of parameters at the callee exceeds the
	number of arguments at the call stmt.
	(callgraph_superedge::get_parm_for_arg): Likewise.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93382
	* program-state.cc (sm_state_map::on_svalue_purge): If the
	entry survives, but the origin is being purged, then reset the
	origin to null.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	* sm-signal.cc: Fix nesting of CHECKING_P and namespace ana.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93378
	* engine.cc (setjmp_svalue::compare_fields): Update for
	replacement of m_enode with m_setjmp_record.
	(setjmp_svalue::add_to_hash): Likewise.
	(setjmp_svalue::get_index): Rename...
	(setjmp_svalue::get_enode_index): ...to this.
	(setjmp_svalue::print_details): Update for replacement of m_enode
	with m_setjmp_record.
	(exploded_node::on_longjmp): Likewise.
	* exploded-graph.h (rewind_info_t::m_enode_origin): Replace...
	(rewind_info_t::m_setjmp_record): ...with this.
	(rewind_info_t::rewind_info_t): Update for replacement of m_enode
	with m_setjmp_record.
	(rewind_info_t::get_setjmp_point): Likewise.
	(rewind_info_t::get_setjmp_call): Likewise.
	* region-model.cc (region_model::dump_summary_of_map): Likewise.
	(region_model::on_setjmp): Likewise.
	* region-model.h (struct setjmp_record): New struct.
	(setjmp_svalue::m_enode): Replace...
	(setjmp_svalue::m_setjmp_record): ...with this.
	(setjmp_svalue::setjmp_svalue): Update for replacement of m_enode
	with m_setjmp_record.
	(setjmp_svalue::clone): Likewise.
	(setjmp_svalue::get_index): Rename...
	(setjmp_svalue::get_enode_index): ...to this.
	(setjmp_svalue::get_exploded_node): Replace...
	(setjmp_svalue::get_setjmp_record): ...with this.

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93316
	* analyzer.cc (is_setjmp_call_p): Check for "setjmp" as well as
	"_setjmp".

2020-01-22  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93307
	* analysis-plan.h: Wrap everything namespace "ana".
	* analyzer-logging.cc: Likewise.
	* analyzer-logging.h: Likewise.
	* analyzer-pass.cc (pass_analyzer::execute): Update for "ana"
	namespace.
	* analyzer-selftests.cc: Wrap everything namespace "ana".
	* analyzer-selftests.h: Likewise.
	* analyzer.h: Likewise for forward decls of types.
	* call-string.h: Likewise.
	* checker-path.cc: Likewise.
	* checker-path.h: Likewise.
	* constraint-manager.cc: Likewise.
	* constraint-manager.h: Likewise.
	* diagnostic-manager.cc: Likewise.
	* diagnostic-manager.h: Likewise.
	* engine.cc: Likewise.
	* engine.h: Likewise.
	* exploded-graph.h: Likewise.
	* function-set.cc: Likewise.
	* function-set.h: Likewise.
	* pending-diagnostic.cc: Likewise.
	* pending-diagnostic.h: Likewise.
	* program-point.cc: Likewise.
	* program-point.h: Likewise.
	* program-state.cc: Likewise.
	* program-state.h: Likewise.
	* region-model.cc: Likewise.
	* region-model.h: Likewise.
	* sm-file.cc: Likewise.
	* sm-malloc.cc: Likewise.
	* sm-pattern-test.cc: Likewise.
	* sm-sensitive.cc: Likewise.
	* sm-signal.cc: Likewise.
	* sm-taint.cc: Likewise.
	* sm.cc: Likewise.
	* sm.h: Likewise.
	* state-purge.h: Likewise.
	* supergraph.cc: Likewise.
	* supergraph.h: Likewise.

2020-01-21  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93352
	* region-model.cc (int_cmp): Rename to...
	(array_region::key_cmp): ...this, using key_t rather than int.
	Rewrite in terms of comparisons rather than subtraction to
	ensure qsort is anti-symmetric when handling extreme values.
	(array_region::walk_for_canonicalization): Update for above
	renaming.
	* region-model.h (array_region::key_cmp): New decl.

2020-01-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93290
	* region-model.cc (region_model::eval_condition_without_cm): Avoid
	gcc_unreachable for unexpected operations for the case where
	we're comparing an svalue against itself.

2020-01-17  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93281
	* region-model.cc
	(region_model::convert_byte_offset_to_array_index): Convert to
	ssizetype before dividing by byte_size.  Use fold_binary rather
	than fold_build2 to avoid needlessly constructing a tree for the
	non-const case.

2020-01-15  David Malcolm  <dmalcolm@redhat.com>

	* engine.cc (class impl_region_model_context): Fix comment.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/93212
	* region-model.cc (make_region_for_type): Use
	FUNC_OR_METHOD_TYPE_P rather than comparing against FUNCTION_TYPE.
	* region-model.h (function_region::function_region): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* program-state.cc (sm_state_map::clone_with_remapping): Copy
	m_global_state.
	(selftest::test_program_state_merging_2): New selftest.
	(selftest::analyzer_program_state_cc_tests): Call it.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.h (checker_path::get_checker_event): New function.
	(checker_path): Add DISABLE_COPY_AND_ASSIGN; make fields private.
	* diagnostic-manager.cc
	(diagnostic_manager::prune_for_sm_diagnostic): Replace direct
	access to checker_path::m_events with accessor functions.  Fix
	overlong line.
	(diagnostic_manager::prune_interproc_events): Replace direct
	access to checker_path::m_events with accessor functions.
	(diagnostic_manager::finish_pruning): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* checker-path.h (checker_event::clone): Delete vfunc decl.
	(debug_event::clone): Delete vfunc impl.
	(custom_event::clone): Delete vfunc impl.
	(statement_event::clone): Delete vfunc impl.
	(function_entry_event::clone): Delete vfunc impl.
	(state_change_event::clone): Delete vfunc impl.
	(start_cfg_edge_event::clone): Delete vfunc impl.
	(end_cfg_edge_event::clone): Delete vfunc impl.
	(call_event::clone): Delete vfunc impl.
	(return_event::clone): Delete vfunc impl.
	(setjmp_event::clone): Delete vfunc impl.
	(rewind_from_longjmp_event::clone): Delete vfunc impl.
	(rewind_to_setjmp_event::clone): Delete vfunc impl.
	(warning_event::clone): Delete vfunc impl.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* supergraph.cc (supernode::dump_dot): Ensure that the TABLE
	element has at least one TR.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/58237
	* engine.cc (leak_stmt_finder::find_stmt): Use get_pure_location
	when comparing against UNKNOWN_LOCATION.
	(stmt_requires_new_enode_p): Likewise.
	(exploded_graph::dump_exploded_nodes): Likewise.
	* supergraph.cc (supernode::get_start_location): Likewise.
	(supernode::get_end_location): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	PR analyzer/58237
	* analyzer-selftests.cc (selftest::run_analyzer_selftests): Call
	selftest::analyzer_sm_file_cc_tests.
	* analyzer-selftests.h (selftest::analyzer_sm_file_cc_tests): New
	decl.
	* sm-file.cc: Include "analyzer/function-set.h" and
	"analyzer/analyzer-selftests.h".
	(get_file_using_fns): New function.
	(is_file_using_fn_p): New function.
	(fileptr_state_machine::on_stmt): Return true for known functions.
	(selftest::analyzer_sm_file_cc_tests): New function.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-selftests.cc (selftest::run_analyzer_selftests): Call
	selftest::analyzer_sm_signal_cc_tests.
	* analyzer-selftests.h (selftest::analyzer_sm_signal_cc_tests):
	New decl.
	* sm-signal.cc: Include "analyzer/function-set.h" and
	"analyzer/analyzer-selftests.h".
	(get_async_signal_unsafe_fns): New function.
	(signal_unsafe_p): Reimplement in terms of the above.
	(selftest::analyzer_sm_signal_cc_tests): New function.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer-selftests.cc (selftest::run_analyzer_selftests): Call
	selftest::analyzer_function_set_cc_tests.
	* analyzer-selftests.h (selftest::analyzer_function_set_cc_tests):
	New decl.
	* function-set.cc: New file.
	* function-set.h: New file.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* analyzer.h (fndecl_has_gimple_body_p): New decl.
	* engine.cc (impl_region_model_context::on_unknown_change): New
	function.
	(fndecl_has_gimple_body_p): Make non-static.
	(exploded_node::on_stmt): Treat __analyzer_dump_exploded_nodes as
	known.  Track whether we have a call with unknown side-effects and
	pass it to on_call_post.
	* exploded-graph.h (impl_region_model_context::on_unknown_change):
	New decl.
	* program-state.cc (sm_state_map::on_unknown_change): New function.
	* program-state.h (sm_state_map::on_unknown_change): New decl.
	* region-model.cc: Include "bitmap.h".
	(region_model::on_call_pre): Return a bool, capturing whether the
	call has unknown side effects.
	(region_model::on_call_post): Add arg "bool unknown_side_effects"
	and if true, call handle_unrecognized_call.
	(class reachable_regions): New class.
	(region_model::handle_unrecognized_call): New function.
	* region-model.h (region_model::on_call_pre): Return a bool.
	(region_model::on_call_post): Add arg "bool unknown_side_effects".
	(region_model::handle_unrecognized_call): New decl.
	(region_model_context::on_unknown_change): New vfunc.
	(test_region_model_context::on_unknown_change): New function.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (saved_diagnostic::operator==): Move here
	from header.  Replace pointer equality test on m_var with call to
	pending_diagnostic::same_tree_p.
	* diagnostic-manager.h (saved_diagnostic::operator==): Move to
	diagnostic-manager.cc.
	* pending-diagnostic.cc (pending_diagnostic::same_tree_p): New.
	* pending-diagnostic.h (pending_diagnostic::same_tree_p): New.
	* sm-file.cc (file_diagnostic::subclass_equal_p): Replace pointer
	equality on m_arg with call to pending_diagnostic::same_tree_p.
	* sm-malloc.cc (malloc_diagnostic::subclass_equal_p): Likewise.
	(possible_null_arg::subclass_equal_p): Likewise.
	(null_arg::subclass_equal_p): Likewise.
	(free_of_non_heap::subclass_equal_p): Likewise.
	* sm-pattern-test.cc (pattern_match::operator==): Likewise.
	* sm-sensitive.cc (exposure_through_output_file::operator==):
	Likewise.
	* sm-taint.cc (tainted_array_index::operator==): Likewise.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* diagnostic-manager.cc (dedupe_winners::add): Add logging
	of deduplication decisions made.

2020-01-14  David Malcolm  <dmalcolm@redhat.com>

	* ChangeLog: New file.
	* analyzer-selftests.cc: New file.
	* analyzer-selftests.h: New file.
	* analyzer.opt: New file.
	* analysis-plan.cc: New file.
	* analysis-plan.h: New file.
	* analyzer-logging.cc: New file.
	* analyzer-logging.h: New file.
	* analyzer-pass.cc: New file.
	* analyzer.cc: New file.
	* analyzer.h: New file.
	* call-string.cc: New file.
	* call-string.h: New file.
	* checker-path.cc: New file.
	* checker-path.h: New file.
	* constraint-manager.cc: New file.
	* constraint-manager.h: New file.
	* diagnostic-manager.cc: New file.
	* diagnostic-manager.h: New file.
	* engine.cc: New file.
	* engine.h: New file.
	* exploded-graph.h: New file.
	* pending-diagnostic.cc: New file.
	* pending-diagnostic.h: New file.
	* program-point.cc: New file.
	* program-point.h: New file.
	* program-state.cc: New file.
	* program-state.h: New file.
	* region-model.cc: New file.
	* region-model.h: New file.
	* sm-file.cc: New file.
	* sm-malloc.cc: New file.
	* sm-malloc.dot: New file.
	* sm-pattern-test.cc: New file.
	* sm-sensitive.cc: New file.
	* sm-signal.cc: New file.
	* sm-taint.cc: New file.
	* sm.cc: New file.
	* sm.h: New file.
	* state-purge.cc: New file.
	* state-purge.h: New file.
	* supergraph.cc: New file.
	* supergraph.h: New file.

2019-12-13  David Malcolm  <dmalcolm@redhat.com>

	* Initial creation


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