| /* Calculate branch probabilities, and basic block execution counts. |
| Copyright (C) 1990-2017 Free Software Foundation, Inc. |
| Contributed by James E. Wilson, UC Berkeley/Cygnus Support; |
| based on some ideas from Dain Samples of UC Berkeley. |
| Further mangling by Bob Manson, Cygnus Support. |
| Converted to use trees by Dale Johannesen, Apple Computer. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Generate basic block profile instrumentation and auxiliary files. |
| Tree-based version. See profile.c for overview. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "memmodel.h" |
| #include "backend.h" |
| #include "target.h" |
| #include "tree.h" |
| #include "gimple.h" |
| #include "cfghooks.h" |
| #include "tree-pass.h" |
| #include "ssa.h" |
| #include "cgraph.h" |
| #include "coverage.h" |
| #include "diagnostic-core.h" |
| #include "fold-const.h" |
| #include "varasm.h" |
| #include "tree-nested.h" |
| #include "gimplify.h" |
| #include "gimple-iterator.h" |
| #include "gimplify-me.h" |
| #include "tree-cfg.h" |
| #include "tree-into-ssa.h" |
| #include "value-prof.h" |
| #include "profile.h" |
| #include "tree-cfgcleanup.h" |
| #include "params.h" |
| #include "stringpool.h" |
| #include "attribs.h" |
| |
| static GTY(()) tree gcov_type_node; |
| static GTY(()) tree tree_interval_profiler_fn; |
| static GTY(()) tree tree_pow2_profiler_fn; |
| static GTY(()) tree tree_one_value_profiler_fn; |
| static GTY(()) tree tree_indirect_call_profiler_fn; |
| static GTY(()) tree tree_average_profiler_fn; |
| static GTY(()) tree tree_ior_profiler_fn; |
| static GTY(()) tree tree_time_profiler_counter; |
| |
| |
| static GTY(()) tree ic_void_ptr_var; |
| static GTY(()) tree ic_gcov_type_ptr_var; |
| static GTY(()) tree ptr_void; |
| |
| /* Do initialization work for the edge profiler. */ |
| |
| /* Add code: |
| __thread gcov* __gcov_indirect_call_counters; // pointer to actual counter |
| __thread void* __gcov_indirect_call_callee; // actual callee address |
| __thread int __gcov_function_counter; // time profiler function counter |
| */ |
| static void |
| init_ic_make_global_vars (void) |
| { |
| tree gcov_type_ptr; |
| |
| ptr_void = build_pointer_type (void_type_node); |
| |
| ic_void_ptr_var |
| = build_decl (UNKNOWN_LOCATION, VAR_DECL, |
| get_identifier ( |
| (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ? |
| "__gcov_indirect_call_topn_callee" : |
| "__gcov_indirect_call_callee")), |
| ptr_void); |
| TREE_PUBLIC (ic_void_ptr_var) = 1; |
| DECL_EXTERNAL (ic_void_ptr_var) = 1; |
| TREE_STATIC (ic_void_ptr_var) = 1; |
| DECL_ARTIFICIAL (ic_void_ptr_var) = 1; |
| DECL_INITIAL (ic_void_ptr_var) = NULL; |
| if (targetm.have_tls) |
| set_decl_tls_model (ic_void_ptr_var, decl_default_tls_model (ic_void_ptr_var)); |
| |
| gcov_type_ptr = build_pointer_type (get_gcov_type ()); |
| |
| ic_gcov_type_ptr_var |
| = build_decl (UNKNOWN_LOCATION, VAR_DECL, |
| get_identifier ( |
| (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) ? |
| "__gcov_indirect_call_topn_counters" : |
| "__gcov_indirect_call_counters")), |
| gcov_type_ptr); |
| TREE_PUBLIC (ic_gcov_type_ptr_var) = 1; |
| DECL_EXTERNAL (ic_gcov_type_ptr_var) = 1; |
| TREE_STATIC (ic_gcov_type_ptr_var) = 1; |
| DECL_ARTIFICIAL (ic_gcov_type_ptr_var) = 1; |
| DECL_INITIAL (ic_gcov_type_ptr_var) = NULL; |
| if (targetm.have_tls) |
| set_decl_tls_model (ic_gcov_type_ptr_var, decl_default_tls_model (ic_gcov_type_ptr_var)); |
| } |
| |
| /* Create the type and function decls for the interface with gcov. */ |
| |
| void |
| gimple_init_gcov_profiler (void) |
| { |
| tree interval_profiler_fn_type; |
| tree pow2_profiler_fn_type; |
| tree one_value_profiler_fn_type; |
| tree gcov_type_ptr; |
| tree ic_profiler_fn_type; |
| tree average_profiler_fn_type; |
| const char *profiler_fn_name; |
| const char *fn_name; |
| |
| if (!gcov_type_node) |
| { |
| const char *fn_suffix |
| = flag_profile_update == PROFILE_UPDATE_ATOMIC ? "_atomic" : ""; |
| |
| gcov_type_node = get_gcov_type (); |
| gcov_type_ptr = build_pointer_type (gcov_type_node); |
| |
| /* void (*) (gcov_type *, gcov_type, int, unsigned) */ |
| interval_profiler_fn_type |
| = build_function_type_list (void_type_node, |
| gcov_type_ptr, gcov_type_node, |
| integer_type_node, |
| unsigned_type_node, NULL_TREE); |
| fn_name = concat ("__gcov_interval_profiler", fn_suffix, NULL); |
| tree_interval_profiler_fn = build_fn_decl (fn_name, |
| interval_profiler_fn_type); |
| free (CONST_CAST (char *, fn_name)); |
| TREE_NOTHROW (tree_interval_profiler_fn) = 1; |
| DECL_ATTRIBUTES (tree_interval_profiler_fn) |
| = tree_cons (get_identifier ("leaf"), NULL, |
| DECL_ATTRIBUTES (tree_interval_profiler_fn)); |
| |
| /* void (*) (gcov_type *, gcov_type) */ |
| pow2_profiler_fn_type |
| = build_function_type_list (void_type_node, |
| gcov_type_ptr, gcov_type_node, |
| NULL_TREE); |
| fn_name = concat ("__gcov_pow2_profiler", fn_suffix, NULL); |
| tree_pow2_profiler_fn = build_fn_decl (fn_name, pow2_profiler_fn_type); |
| free (CONST_CAST (char *, fn_name)); |
| TREE_NOTHROW (tree_pow2_profiler_fn) = 1; |
| DECL_ATTRIBUTES (tree_pow2_profiler_fn) |
| = tree_cons (get_identifier ("leaf"), NULL, |
| DECL_ATTRIBUTES (tree_pow2_profiler_fn)); |
| |
| /* void (*) (gcov_type *, gcov_type) */ |
| one_value_profiler_fn_type |
| = build_function_type_list (void_type_node, |
| gcov_type_ptr, gcov_type_node, |
| NULL_TREE); |
| fn_name = concat ("__gcov_one_value_profiler", fn_suffix, NULL); |
| tree_one_value_profiler_fn = build_fn_decl (fn_name, |
| one_value_profiler_fn_type); |
| free (CONST_CAST (char *, fn_name)); |
| TREE_NOTHROW (tree_one_value_profiler_fn) = 1; |
| DECL_ATTRIBUTES (tree_one_value_profiler_fn) |
| = tree_cons (get_identifier ("leaf"), NULL, |
| DECL_ATTRIBUTES (tree_one_value_profiler_fn)); |
| |
| init_ic_make_global_vars (); |
| |
| /* void (*) (gcov_type, void *) */ |
| ic_profiler_fn_type |
| = build_function_type_list (void_type_node, |
| gcov_type_node, |
| ptr_void, |
| NULL_TREE); |
| profiler_fn_name = "__gcov_indirect_call_profiler_v2"; |
| if (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE)) |
| profiler_fn_name = "__gcov_indirect_call_topn_profiler"; |
| |
| tree_indirect_call_profiler_fn |
| = build_fn_decl (profiler_fn_name, ic_profiler_fn_type); |
| |
| TREE_NOTHROW (tree_indirect_call_profiler_fn) = 1; |
| DECL_ATTRIBUTES (tree_indirect_call_profiler_fn) |
| = tree_cons (get_identifier ("leaf"), NULL, |
| DECL_ATTRIBUTES (tree_indirect_call_profiler_fn)); |
| |
| tree_time_profiler_counter |
| = build_decl (UNKNOWN_LOCATION, VAR_DECL, |
| get_identifier ("__gcov_time_profiler_counter"), |
| get_gcov_type ()); |
| TREE_PUBLIC (tree_time_profiler_counter) = 1; |
| DECL_EXTERNAL (tree_time_profiler_counter) = 1; |
| TREE_STATIC (tree_time_profiler_counter) = 1; |
| DECL_ARTIFICIAL (tree_time_profiler_counter) = 1; |
| DECL_INITIAL (tree_time_profiler_counter) = NULL; |
| |
| /* void (*) (gcov_type *, gcov_type) */ |
| average_profiler_fn_type |
| = build_function_type_list (void_type_node, |
| gcov_type_ptr, gcov_type_node, NULL_TREE); |
| fn_name = concat ("__gcov_average_profiler", fn_suffix, NULL); |
| tree_average_profiler_fn = build_fn_decl (fn_name, |
| average_profiler_fn_type); |
| free (CONST_CAST (char *, fn_name)); |
| TREE_NOTHROW (tree_average_profiler_fn) = 1; |
| DECL_ATTRIBUTES (tree_average_profiler_fn) |
| = tree_cons (get_identifier ("leaf"), NULL, |
| DECL_ATTRIBUTES (tree_average_profiler_fn)); |
| fn_name = concat ("__gcov_ior_profiler", fn_suffix, NULL); |
| tree_ior_profiler_fn = build_fn_decl (fn_name, average_profiler_fn_type); |
| free (CONST_CAST (char *, fn_name)); |
| TREE_NOTHROW (tree_ior_profiler_fn) = 1; |
| DECL_ATTRIBUTES (tree_ior_profiler_fn) |
| = tree_cons (get_identifier ("leaf"), NULL, |
| DECL_ATTRIBUTES (tree_ior_profiler_fn)); |
| |
| /* LTO streamer needs assembler names. Because we create these decls |
| late, we need to initialize them by hand. */ |
| DECL_ASSEMBLER_NAME (tree_interval_profiler_fn); |
| DECL_ASSEMBLER_NAME (tree_pow2_profiler_fn); |
| DECL_ASSEMBLER_NAME (tree_one_value_profiler_fn); |
| DECL_ASSEMBLER_NAME (tree_indirect_call_profiler_fn); |
| DECL_ASSEMBLER_NAME (tree_average_profiler_fn); |
| DECL_ASSEMBLER_NAME (tree_ior_profiler_fn); |
| } |
| } |
| |
| /* Output instructions as GIMPLE trees to increment the edge |
| execution count, and insert them on E. We rely on |
| gsi_insert_on_edge to preserve the order. */ |
| |
| void |
| gimple_gen_edge_profiler (int edgeno, edge e) |
| { |
| tree one; |
| |
| one = build_int_cst (gcov_type_node, 1); |
| |
| if (flag_profile_update == PROFILE_UPDATE_ATOMIC) |
| { |
| /* __atomic_fetch_add (&counter, 1, MEMMODEL_RELAXED); */ |
| tree addr = tree_coverage_counter_addr (GCOV_COUNTER_ARCS, edgeno); |
| tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 |
| ? BUILT_IN_ATOMIC_FETCH_ADD_8: |
| BUILT_IN_ATOMIC_FETCH_ADD_4); |
| gcall *stmt = gimple_build_call (f, 3, addr, one, |
| build_int_cst (integer_type_node, |
| MEMMODEL_RELAXED)); |
| gsi_insert_on_edge (e, stmt); |
| } |
| else |
| { |
| tree ref = tree_coverage_counter_ref (GCOV_COUNTER_ARCS, edgeno); |
| tree gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, |
| NULL, "PROF_edge_counter"); |
| gassign *stmt1 = gimple_build_assign (gcov_type_tmp_var, ref); |
| gcov_type_tmp_var = make_temp_ssa_name (gcov_type_node, |
| NULL, "PROF_edge_counter"); |
| gassign *stmt2 = gimple_build_assign (gcov_type_tmp_var, PLUS_EXPR, |
| gimple_assign_lhs (stmt1), one); |
| gassign *stmt3 = gimple_build_assign (unshare_expr (ref), |
| gimple_assign_lhs (stmt2)); |
| gsi_insert_on_edge (e, stmt1); |
| gsi_insert_on_edge (e, stmt2); |
| gsi_insert_on_edge (e, stmt3); |
| } |
| } |
| |
| /* Emits code to get VALUE to instrument at GSI, and returns the |
| variable containing the value. */ |
| |
| static tree |
| prepare_instrumented_value (gimple_stmt_iterator *gsi, histogram_value value) |
| { |
| tree val = value->hvalue.value; |
| if (POINTER_TYPE_P (TREE_TYPE (val))) |
| val = fold_convert (build_nonstandard_integer_type |
| (TYPE_PRECISION (TREE_TYPE (val)), 1), val); |
| return force_gimple_operand_gsi (gsi, fold_convert (gcov_type_node, val), |
| true, NULL_TREE, true, GSI_SAME_STMT); |
| } |
| |
| /* Output instructions as GIMPLE trees to increment the interval histogram |
| counter. VALUE is the expression whose value is profiled. TAG is the |
| tag of the section for counters, BASE is offset of the counter position. */ |
| |
| void |
| gimple_gen_interval_profiler (histogram_value value, unsigned tag, unsigned base) |
| { |
| gimple *stmt = value->hvalue.stmt; |
| gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| tree ref = tree_coverage_counter_ref (tag, base), ref_ptr; |
| gcall *call; |
| tree val; |
| tree start = build_int_cst_type (integer_type_node, |
| value->hdata.intvl.int_start); |
| tree steps = build_int_cst_type (unsigned_type_node, |
| value->hdata.intvl.steps); |
| |
| ref_ptr = force_gimple_operand_gsi (&gsi, |
| build_addr (ref), |
| true, NULL_TREE, true, GSI_SAME_STMT); |
| val = prepare_instrumented_value (&gsi, value); |
| call = gimple_build_call (tree_interval_profiler_fn, 4, |
| ref_ptr, val, start, steps); |
| gsi_insert_before (&gsi, call, GSI_NEW_STMT); |
| } |
| |
| /* Output instructions as GIMPLE trees to increment the power of two histogram |
| counter. VALUE is the expression whose value is profiled. TAG is the tag |
| of the section for counters, BASE is offset of the counter position. */ |
| |
| void |
| gimple_gen_pow2_profiler (histogram_value value, unsigned tag, unsigned base) |
| { |
| gimple *stmt = value->hvalue.stmt; |
| gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| tree ref_ptr = tree_coverage_counter_addr (tag, base); |
| gcall *call; |
| tree val; |
| |
| ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| true, NULL_TREE, true, GSI_SAME_STMT); |
| val = prepare_instrumented_value (&gsi, value); |
| call = gimple_build_call (tree_pow2_profiler_fn, 2, ref_ptr, val); |
| gsi_insert_before (&gsi, call, GSI_NEW_STMT); |
| } |
| |
| /* Output instructions as GIMPLE trees for code to find the most common value. |
| VALUE is the expression whose value is profiled. TAG is the tag of the |
| section for counters, BASE is offset of the counter position. */ |
| |
| void |
| gimple_gen_one_value_profiler (histogram_value value, unsigned tag, unsigned base) |
| { |
| gimple *stmt = value->hvalue.stmt; |
| gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| tree ref_ptr = tree_coverage_counter_addr (tag, base); |
| gcall *call; |
| tree val; |
| |
| ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| true, NULL_TREE, true, GSI_SAME_STMT); |
| val = prepare_instrumented_value (&gsi, value); |
| call = gimple_build_call (tree_one_value_profiler_fn, 2, ref_ptr, val); |
| gsi_insert_before (&gsi, call, GSI_NEW_STMT); |
| } |
| |
| |
| /* Output instructions as GIMPLE trees for code to find the most |
| common called function in indirect call. |
| VALUE is the call expression whose indirect callee is profiled. |
| TAG is the tag of the section for counters, BASE is offset of the |
| counter position. */ |
| |
| void |
| gimple_gen_ic_profiler (histogram_value value, unsigned tag, unsigned base) |
| { |
| tree tmp1; |
| gassign *stmt1, *stmt2, *stmt3; |
| gimple *stmt = value->hvalue.stmt; |
| gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| tree ref_ptr = tree_coverage_counter_addr (tag, base); |
| |
| if ( (PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) && |
| tag == GCOV_COUNTER_V_INDIR) || |
| (!PARAM_VALUE (PARAM_INDIR_CALL_TOPN_PROFILE) && |
| tag == GCOV_COUNTER_ICALL_TOPNV)) |
| return; |
| |
| ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| true, NULL_TREE, true, GSI_SAME_STMT); |
| |
| /* Insert code: |
| |
| stmt1: __gcov_indirect_call_counters = get_relevant_counter_ptr (); |
| stmt2: tmp1 = (void *) (indirect call argument value) |
| stmt3: __gcov_indirect_call_callee = tmp1; |
| |
| Example: |
| f_1 = foo; |
| __gcov_indirect_call_counters = &__gcov4.main[0]; |
| PROF_9 = f_1; |
| __gcov_indirect_call_callee = PROF_9; |
| _4 = f_1 (); |
| */ |
| |
| stmt1 = gimple_build_assign (ic_gcov_type_ptr_var, ref_ptr); |
| tmp1 = make_temp_ssa_name (ptr_void, NULL, "PROF"); |
| stmt2 = gimple_build_assign (tmp1, unshare_expr (value->hvalue.value)); |
| stmt3 = gimple_build_assign (ic_void_ptr_var, gimple_assign_lhs (stmt2)); |
| |
| gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); |
| gsi_insert_before (&gsi, stmt2, GSI_SAME_STMT); |
| gsi_insert_before (&gsi, stmt3, GSI_SAME_STMT); |
| } |
| |
| |
| /* Output instructions as GIMPLE trees for code to find the most |
| common called function in indirect call. Insert instructions at the |
| beginning of every possible called function. |
| */ |
| |
| void |
| gimple_gen_ic_func_profiler (void) |
| { |
| struct cgraph_node * c_node = cgraph_node::get (current_function_decl); |
| gcall *stmt1; |
| tree tree_uid, cur_func, void0; |
| |
| if (c_node->only_called_directly_p ()) |
| return; |
| |
| gimple_init_gcov_profiler (); |
| |
| basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); |
| basic_block cond_bb = split_edge (single_succ_edge (entry)); |
| basic_block update_bb = split_edge (single_succ_edge (cond_bb)); |
| |
| /* We need to do an extra split in order to not create an input |
| for a possible PHI node. */ |
| split_edge (single_succ_edge (update_bb)); |
| |
| edge true_edge = single_succ_edge (cond_bb); |
| true_edge->flags = EDGE_TRUE_VALUE; |
| |
| profile_probability probability; |
| if (DECL_VIRTUAL_P (current_function_decl)) |
| probability = profile_probability::very_likely (); |
| else |
| probability = profile_probability::unlikely (); |
| |
| true_edge->probability = probability; |
| edge e = make_edge (cond_bb, single_succ_edge (update_bb)->dest, |
| EDGE_FALSE_VALUE); |
| e->probability = true_edge->probability.invert (); |
| |
| /* Insert code: |
| |
| if (__gcov_indirect_call_callee != NULL) |
| __gcov_indirect_call_profiler_v2 (profile_id, ¤t_function_decl); |
| |
| The function __gcov_indirect_call_profiler_v2 is responsible for |
| resetting __gcov_indirect_call_callee to NULL. */ |
| |
| gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); |
| void0 = build_int_cst (build_pointer_type (void_type_node), 0); |
| |
| tree ref = force_gimple_operand_gsi (&gsi, ic_void_ptr_var, true, NULL_TREE, |
| true, GSI_SAME_STMT); |
| |
| gcond *cond = gimple_build_cond (NE_EXPR, ref, |
| void0, NULL, NULL); |
| gsi_insert_before (&gsi, cond, GSI_NEW_STMT); |
| |
| gsi = gsi_after_labels (update_bb); |
| |
| cur_func = force_gimple_operand_gsi (&gsi, |
| build_addr (current_function_decl), |
| true, NULL_TREE, |
| true, GSI_SAME_STMT); |
| tree_uid = build_int_cst |
| (gcov_type_node, |
| cgraph_node::get (current_function_decl)->profile_id); |
| stmt1 = gimple_build_call (tree_indirect_call_profiler_fn, 2, |
| tree_uid, cur_func); |
| gsi_insert_before (&gsi, stmt1, GSI_SAME_STMT); |
| } |
| |
| /* Output instructions as GIMPLE tree at the beginning for each function. |
| TAG is the tag of the section for counters, BASE is offset of the |
| counter position and GSI is the iterator we place the counter. */ |
| |
| void |
| gimple_gen_time_profiler (unsigned tag, unsigned base) |
| { |
| tree type = get_gcov_type (); |
| basic_block entry = ENTRY_BLOCK_PTR_FOR_FN (cfun); |
| basic_block cond_bb = split_edge (single_succ_edge (entry)); |
| basic_block update_bb = split_edge (single_succ_edge (cond_bb)); |
| |
| /* We need to do an extra split in order to not create an input |
| for a possible PHI node. */ |
| split_edge (single_succ_edge (update_bb)); |
| |
| edge true_edge = single_succ_edge (cond_bb); |
| true_edge->flags = EDGE_TRUE_VALUE; |
| true_edge->probability = profile_probability::unlikely (); |
| edge e |
| = make_edge (cond_bb, single_succ_edge (update_bb)->dest, EDGE_FALSE_VALUE); |
| e->probability = true_edge->probability.invert (); |
| |
| gimple_stmt_iterator gsi = gsi_start_bb (cond_bb); |
| tree original_ref = tree_coverage_counter_ref (tag, base); |
| tree ref = force_gimple_operand_gsi (&gsi, original_ref, true, NULL_TREE, |
| true, GSI_SAME_STMT); |
| tree one = build_int_cst (type, 1); |
| |
| /* Emit: if (counters[0] != 0). */ |
| gcond *cond = gimple_build_cond (EQ_EXPR, ref, build_int_cst (type, 0), |
| NULL, NULL); |
| gsi_insert_before (&gsi, cond, GSI_NEW_STMT); |
| |
| gsi = gsi_start_bb (update_bb); |
| |
| /* Emit: counters[0] = ++__gcov_time_profiler_counter. */ |
| if (flag_profile_update == PROFILE_UPDATE_ATOMIC) |
| { |
| tree ptr = make_temp_ssa_name (build_pointer_type (type), NULL, |
| "time_profiler_counter_ptr"); |
| tree addr = build1 (ADDR_EXPR, TREE_TYPE (ptr), |
| tree_time_profiler_counter); |
| gassign *assign = gimple_build_assign (ptr, NOP_EXPR, addr); |
| gsi_insert_before (&gsi, assign, GSI_NEW_STMT); |
| tree f = builtin_decl_explicit (LONG_LONG_TYPE_SIZE > 32 |
| ? BUILT_IN_ATOMIC_ADD_FETCH_8: |
| BUILT_IN_ATOMIC_ADD_FETCH_4); |
| gcall *stmt = gimple_build_call (f, 3, ptr, one, |
| build_int_cst (integer_type_node, |
| MEMMODEL_RELAXED)); |
| tree result_type = TREE_TYPE (TREE_TYPE (f)); |
| tree tmp = make_temp_ssa_name (result_type, NULL, "time_profile"); |
| gimple_set_lhs (stmt, tmp); |
| gsi_insert_after (&gsi, stmt, GSI_NEW_STMT); |
| tmp = make_temp_ssa_name (type, NULL, "time_profile"); |
| assign = gimple_build_assign (tmp, NOP_EXPR, |
| gimple_call_lhs (stmt)); |
| gsi_insert_after (&gsi, assign, GSI_NEW_STMT); |
| assign = gimple_build_assign (original_ref, tmp); |
| gsi_insert_after (&gsi, assign, GSI_NEW_STMT); |
| } |
| else |
| { |
| tree tmp = make_temp_ssa_name (type, NULL, "time_profile"); |
| gassign *assign = gimple_build_assign (tmp, tree_time_profiler_counter); |
| gsi_insert_before (&gsi, assign, GSI_NEW_STMT); |
| |
| tmp = make_temp_ssa_name (type, NULL, "time_profile"); |
| assign = gimple_build_assign (tmp, PLUS_EXPR, gimple_assign_lhs (assign), |
| one); |
| gsi_insert_after (&gsi, assign, GSI_NEW_STMT); |
| assign = gimple_build_assign (original_ref, tmp); |
| gsi_insert_after (&gsi, assign, GSI_NEW_STMT); |
| assign = gimple_build_assign (tree_time_profiler_counter, tmp); |
| gsi_insert_after (&gsi, assign, GSI_NEW_STMT); |
| } |
| } |
| |
| /* Output instructions as GIMPLE trees to increment the average histogram |
| counter. VALUE is the expression whose value is profiled. TAG is the |
| tag of the section for counters, BASE is offset of the counter position. */ |
| |
| void |
| gimple_gen_average_profiler (histogram_value value, unsigned tag, unsigned base) |
| { |
| gimple *stmt = value->hvalue.stmt; |
| gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| tree ref_ptr = tree_coverage_counter_addr (tag, base); |
| gcall *call; |
| tree val; |
| |
| ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| true, NULL_TREE, |
| true, GSI_SAME_STMT); |
| val = prepare_instrumented_value (&gsi, value); |
| call = gimple_build_call (tree_average_profiler_fn, 2, ref_ptr, val); |
| gsi_insert_before (&gsi, call, GSI_NEW_STMT); |
| } |
| |
| /* Output instructions as GIMPLE trees to increment the ior histogram |
| counter. VALUE is the expression whose value is profiled. TAG is the |
| tag of the section for counters, BASE is offset of the counter position. */ |
| |
| void |
| gimple_gen_ior_profiler (histogram_value value, unsigned tag, unsigned base) |
| { |
| gimple *stmt = value->hvalue.stmt; |
| gimple_stmt_iterator gsi = gsi_for_stmt (stmt); |
| tree ref_ptr = tree_coverage_counter_addr (tag, base); |
| gcall *call; |
| tree val; |
| |
| ref_ptr = force_gimple_operand_gsi (&gsi, ref_ptr, |
| true, NULL_TREE, true, GSI_SAME_STMT); |
| val = prepare_instrumented_value (&gsi, value); |
| call = gimple_build_call (tree_ior_profiler_fn, 2, ref_ptr, val); |
| gsi_insert_before (&gsi, call, GSI_NEW_STMT); |
| } |
| |
| #ifndef HAVE_sync_compare_and_swapsi |
| #define HAVE_sync_compare_and_swapsi 0 |
| #endif |
| #ifndef HAVE_atomic_compare_and_swapsi |
| #define HAVE_atomic_compare_and_swapsi 0 |
| #endif |
| |
| #ifndef HAVE_sync_compare_and_swapdi |
| #define HAVE_sync_compare_and_swapdi 0 |
| #endif |
| #ifndef HAVE_atomic_compare_and_swapdi |
| #define HAVE_atomic_compare_and_swapdi 0 |
| #endif |
| |
| /* Profile all functions in the callgraph. */ |
| |
| static unsigned int |
| tree_profiling (void) |
| { |
| struct cgraph_node *node; |
| |
| /* Verify whether we can utilize atomic update operations. */ |
| bool can_support_atomic = false; |
| unsigned HOST_WIDE_INT gcov_type_size |
| = tree_to_uhwi (TYPE_SIZE_UNIT (get_gcov_type ())); |
| if (gcov_type_size == 4) |
| can_support_atomic |
| = HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi; |
| else if (gcov_type_size == 8) |
| can_support_atomic |
| = HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi; |
| |
| if (flag_profile_update == PROFILE_UPDATE_ATOMIC |
| && !can_support_atomic) |
| { |
| warning (0, "target does not support atomic profile update, " |
| "single mode is selected"); |
| flag_profile_update = PROFILE_UPDATE_SINGLE; |
| } |
| else if (flag_profile_update == PROFILE_UPDATE_PREFER_ATOMIC) |
| flag_profile_update = can_support_atomic |
| ? PROFILE_UPDATE_ATOMIC : PROFILE_UPDATE_SINGLE; |
| |
| /* This is a small-ipa pass that gets called only once, from |
| cgraphunit.c:ipa_passes(). */ |
| gcc_assert (symtab->state == IPA_SSA); |
| |
| init_node_map (true); |
| |
| FOR_EACH_DEFINED_FUNCTION (node) |
| { |
| if (!gimple_has_body_p (node->decl)) |
| continue; |
| |
| /* Don't profile functions produced for builtin stuff. */ |
| if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
| continue; |
| |
| if (lookup_attribute ("no_profile_instrument_function", |
| DECL_ATTRIBUTES (node->decl))) |
| continue; |
| /* Do not instrument extern inline functions when testing coverage. |
| While this is not perfectly consistent (early inlined extern inlines |
| will get acocunted), testsuite expects that. */ |
| if (DECL_EXTERNAL (node->decl) |
| && flag_test_coverage) |
| continue; |
| |
| push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
| |
| /* Local pure-const may imply need to fixup the cfg. */ |
| if (execute_fixup_cfg () & TODO_cleanup_cfg) |
| cleanup_tree_cfg (); |
| |
| branch_prob (); |
| |
| if (! flag_branch_probabilities |
| && flag_profile_values) |
| gimple_gen_ic_func_profiler (); |
| |
| if (flag_branch_probabilities |
| && flag_profile_values |
| && flag_value_profile_transformations) |
| gimple_value_profile_transformations (); |
| |
| /* The above could hose dominator info. Currently there is |
| none coming in, this is a safety valve. It should be |
| easy to adjust it, if and when there is some. */ |
| free_dominance_info (CDI_DOMINATORS); |
| free_dominance_info (CDI_POST_DOMINATORS); |
| pop_cfun (); |
| } |
| |
| /* Drop pure/const flags from instrumented functions. */ |
| if (profile_arc_flag || flag_test_coverage) |
| FOR_EACH_DEFINED_FUNCTION (node) |
| { |
| if (!gimple_has_body_p (node->decl) |
| || !(!node->clone_of |
| || node->decl != node->clone_of->decl)) |
| continue; |
| |
| /* Don't profile functions produced for builtin stuff. */ |
| if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
| continue; |
| |
| node->set_const_flag (false, false); |
| node->set_pure_flag (false, false); |
| } |
| |
| /* Update call statements and rebuild the cgraph. */ |
| FOR_EACH_DEFINED_FUNCTION (node) |
| { |
| basic_block bb; |
| |
| if (!gimple_has_body_p (node->decl) |
| || !(!node->clone_of |
| || node->decl != node->clone_of->decl)) |
| continue; |
| |
| /* Don't profile functions produced for builtin stuff. */ |
| if (DECL_SOURCE_LOCATION (node->decl) == BUILTINS_LOCATION) |
| continue; |
| |
| push_cfun (DECL_STRUCT_FUNCTION (node->decl)); |
| |
| FOR_EACH_BB_FN (bb, cfun) |
| { |
| gimple_stmt_iterator gsi; |
| for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi)) |
| { |
| gimple *stmt = gsi_stmt (gsi); |
| if (is_gimple_call (stmt)) |
| update_stmt (stmt); |
| } |
| } |
| |
| /* re-merge split blocks. */ |
| cleanup_tree_cfg (); |
| update_ssa (TODO_update_ssa); |
| |
| cgraph_edge::rebuild_edges (); |
| |
| pop_cfun (); |
| } |
| |
| handle_missing_profiles (); |
| |
| del_node_map (); |
| return 0; |
| } |
| |
| namespace { |
| |
| const pass_data pass_data_ipa_tree_profile = |
| { |
| SIMPLE_IPA_PASS, /* type */ |
| "profile", /* name */ |
| OPTGROUP_NONE, /* optinfo_flags */ |
| TV_IPA_PROFILE, /* tv_id */ |
| 0, /* properties_required */ |
| 0, /* properties_provided */ |
| 0, /* properties_destroyed */ |
| 0, /* todo_flags_start */ |
| TODO_dump_symtab, /* todo_flags_finish */ |
| }; |
| |
| class pass_ipa_tree_profile : public simple_ipa_opt_pass |
| { |
| public: |
| pass_ipa_tree_profile (gcc::context *ctxt) |
| : simple_ipa_opt_pass (pass_data_ipa_tree_profile, ctxt) |
| {} |
| |
| /* opt_pass methods: */ |
| virtual bool gate (function *); |
| virtual unsigned int execute (function *) { return tree_profiling (); } |
| |
| }; // class pass_ipa_tree_profile |
| |
| bool |
| pass_ipa_tree_profile::gate (function *) |
| { |
| /* When profile instrumentation, use or test coverage shall be performed. |
| But for AutoFDO, this there is no instrumentation, thus this pass is |
| diabled. */ |
| return (!in_lto_p && !flag_auto_profile |
| && (flag_branch_probabilities || flag_test_coverage |
| || profile_arc_flag)); |
| } |
| |
| } // anon namespace |
| |
| simple_ipa_opt_pass * |
| make_pass_ipa_tree_profile (gcc::context *ctxt) |
| { |
| return new pass_ipa_tree_profile (ctxt); |
| } |
| |
| #include "gt-tree-profile.h" |