| /* Gimple walk support. |
| |
| Copyright (C) 2007-2021 Free Software Foundation, Inc. |
| Contributed by Aldy Hernandez <aldyh@redhat.com> |
| |
| 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/>. */ |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "backend.h" |
| #include "tree.h" |
| #include "gimple.h" |
| #include "gimple-iterator.h" |
| #include "gimple-walk.h" |
| #include "stmt.h" |
| |
| /* Walk all the statements in the sequence *PSEQ calling walk_gimple_stmt |
| on each one. WI is as in walk_gimple_stmt. |
| |
| If walk_gimple_stmt returns non-NULL, the walk is stopped, and the |
| value is stored in WI->CALLBACK_RESULT. Also, the statement that |
| produced the value is returned if this statement has not been |
| removed by a callback (wi->removed_stmt). If the statement has |
| been removed, NULL is returned. |
| |
| Otherwise, all the statements are walked and NULL returned. */ |
| |
| gimple * |
| walk_gimple_seq_mod (gimple_seq *pseq, walk_stmt_fn callback_stmt, |
| walk_tree_fn callback_op, struct walk_stmt_info *wi) |
| { |
| gimple_stmt_iterator gsi; |
| |
| for (gsi = gsi_start (*pseq); !gsi_end_p (gsi); ) |
| { |
| tree ret = walk_gimple_stmt (&gsi, callback_stmt, callback_op, wi); |
| if (ret) |
| { |
| /* If CALLBACK_STMT or CALLBACK_OP return a value, WI must exist |
| to hold it. */ |
| gcc_assert (wi); |
| wi->callback_result = ret; |
| |
| return wi->removed_stmt ? NULL : gsi_stmt (gsi); |
| } |
| |
| if (!wi->removed_stmt) |
| gsi_next (&gsi); |
| } |
| |
| if (wi) |
| wi->callback_result = NULL_TREE; |
| |
| return NULL; |
| } |
| |
| |
| /* Like walk_gimple_seq_mod, but ensure that the head of SEQ isn't |
| changed by the callbacks. */ |
| |
| gimple * |
| walk_gimple_seq (gimple_seq seq, walk_stmt_fn callback_stmt, |
| walk_tree_fn callback_op, struct walk_stmt_info *wi) |
| { |
| gimple_seq seq2 = seq; |
| gimple *ret = walk_gimple_seq_mod (&seq2, callback_stmt, callback_op, wi); |
| gcc_assert (seq2 == seq); |
| return ret; |
| } |
| |
| |
| /* Helper function for walk_gimple_stmt. Walk operands of a GIMPLE_ASM. */ |
| |
| static tree |
| walk_gimple_asm (gasm *stmt, walk_tree_fn callback_op, |
| struct walk_stmt_info *wi) |
| { |
| tree ret, op; |
| unsigned noutputs; |
| const char **oconstraints; |
| unsigned i, n; |
| const char *constraint; |
| bool allows_mem, allows_reg, is_inout; |
| |
| noutputs = gimple_asm_noutputs (stmt); |
| oconstraints = (const char **) alloca ((noutputs) * sizeof (const char *)); |
| |
| for (i = 0; i < noutputs; i++) |
| { |
| op = gimple_asm_output_op (stmt, i); |
| constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (op))); |
| oconstraints[i] = constraint; |
| if (wi) |
| { |
| if (parse_output_constraint (&constraint, i, 0, 0, &allows_mem, |
| &allows_reg, &is_inout)) |
| wi->val_only = (allows_reg || !allows_mem); |
| } |
| if (wi) |
| wi->is_lhs = true; |
| ret = walk_tree (&TREE_VALUE (op), callback_op, wi, NULL); |
| if (ret) |
| return ret; |
| } |
| |
| n = gimple_asm_ninputs (stmt); |
| for (i = 0; i < n; i++) |
| { |
| op = gimple_asm_input_op (stmt, i); |
| constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (op))); |
| |
| if (wi) |
| { |
| if (parse_input_constraint (&constraint, 0, 0, noutputs, 0, |
| oconstraints, &allows_mem, &allows_reg)) |
| { |
| wi->val_only = (allows_reg || !allows_mem); |
| /* Although input "m" is not really a LHS, we need a lvalue. */ |
| wi->is_lhs = !wi->val_only; |
| } |
| } |
| ret = walk_tree (&TREE_VALUE (op), callback_op, wi, NULL); |
| if (ret) |
| return ret; |
| } |
| |
| if (wi) |
| { |
| wi->is_lhs = false; |
| wi->val_only = true; |
| } |
| |
| n = gimple_asm_nlabels (stmt); |
| for (i = 0; i < n; i++) |
| { |
| op = gimple_asm_label_op (stmt, i); |
| ret = walk_tree (&TREE_VALUE (op), callback_op, wi, NULL); |
| if (ret) |
| return ret; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| |
| /* Helper function of WALK_GIMPLE_STMT. Walk every tree operand in |
| STMT. CALLBACK_OP and WI are as in WALK_GIMPLE_STMT. |
| |
| CALLBACK_OP is called on each operand of STMT via walk_tree. |
| Additional parameters to walk_tree must be stored in WI. For each operand |
| OP, walk_tree is called as: |
| |
| walk_tree (&OP, CALLBACK_OP, WI, WI->PSET) |
| |
| If CALLBACK_OP returns non-NULL for an operand, the remaining |
| operands are not scanned. |
| |
| The return value is that returned by the last call to walk_tree, or |
| NULL_TREE if no CALLBACK_OP is specified. */ |
| |
| tree |
| walk_gimple_op (gimple *stmt, walk_tree_fn callback_op, |
| struct walk_stmt_info *wi) |
| { |
| hash_set<tree> *pset = (wi) ? wi->pset : NULL; |
| unsigned i; |
| tree ret = NULL_TREE; |
| |
| if (wi) |
| wi->stmt = stmt; |
| |
| switch (gimple_code (stmt)) |
| { |
| case GIMPLE_ASSIGN: |
| /* Walk the RHS operands. If the LHS is of a non-renamable type or |
| is a register variable, we may use a COMPONENT_REF on the RHS. */ |
| if (wi) |
| { |
| tree lhs = gimple_assign_lhs (stmt); |
| wi->val_only |
| = (is_gimple_reg_type (TREE_TYPE (lhs)) && !is_gimple_reg (lhs)) |
| || gimple_assign_rhs_class (stmt) != GIMPLE_SINGLE_RHS; |
| } |
| |
| for (i = 1; i < gimple_num_ops (stmt); i++) |
| { |
| ret = walk_tree (gimple_op_ptr (stmt, i), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| } |
| |
| /* Walk the LHS. If the RHS is appropriate for a memory, we |
| may use a COMPONENT_REF on the LHS. */ |
| if (wi) |
| { |
| /* If the RHS is of a non-renamable type or is a register variable, |
| we may use a COMPONENT_REF on the LHS. */ |
| tree rhs1 = gimple_assign_rhs1 (stmt); |
| wi->val_only |
| = (is_gimple_reg_type (TREE_TYPE (rhs1)) && !is_gimple_reg (rhs1)) |
| || gimple_assign_rhs_class (stmt) != GIMPLE_SINGLE_RHS; |
| wi->is_lhs = true; |
| } |
| |
| ret = walk_tree (gimple_op_ptr (stmt, 0), callback_op, wi, pset); |
| if (ret) |
| return ret; |
| |
| if (wi) |
| { |
| wi->val_only = true; |
| wi->is_lhs = false; |
| } |
| break; |
| |
| case GIMPLE_CALL: |
| if (wi) |
| { |
| wi->is_lhs = false; |
| wi->val_only = true; |
| } |
| |
| ret = walk_tree (gimple_call_chain_ptr (as_a <gcall *> (stmt)), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| |
| ret = walk_tree (gimple_call_fn_ptr (stmt), callback_op, wi, pset); |
| if (ret) |
| return ret; |
| |
| for (i = 0; i < gimple_call_num_args (stmt); i++) |
| { |
| if (wi) |
| wi->val_only |
| = is_gimple_reg_type (TREE_TYPE (gimple_call_arg (stmt, i))); |
| ret = walk_tree (gimple_call_arg_ptr (stmt, i), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| } |
| |
| if (gimple_call_lhs (stmt)) |
| { |
| if (wi) |
| { |
| wi->is_lhs = true; |
| wi->val_only |
| = is_gimple_reg_type (TREE_TYPE (gimple_call_lhs (stmt))); |
| } |
| |
| ret = walk_tree (gimple_call_lhs_ptr (stmt), callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| |
| if (wi) |
| { |
| wi->is_lhs = false; |
| wi->val_only = true; |
| } |
| break; |
| |
| case GIMPLE_CATCH: |
| ret = walk_tree (gimple_catch_types_ptr (as_a <gcatch *> (stmt)), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| break; |
| |
| case GIMPLE_EH_FILTER: |
| ret = walk_tree (gimple_eh_filter_types_ptr (stmt), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| break; |
| |
| case GIMPLE_ASM: |
| ret = walk_gimple_asm (as_a <gasm *> (stmt), callback_op, wi); |
| if (ret) |
| return ret; |
| break; |
| |
| case GIMPLE_OMP_CONTINUE: |
| { |
| gomp_continue *cont_stmt = as_a <gomp_continue *> (stmt); |
| ret = walk_tree (gimple_omp_continue_control_def_ptr (cont_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| |
| ret = walk_tree (gimple_omp_continue_control_use_ptr (cont_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_CRITICAL: |
| { |
| gomp_critical *omp_stmt = as_a <gomp_critical *> (stmt); |
| ret = walk_tree (gimple_omp_critical_name_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_critical_clauses_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_ORDERED: |
| { |
| gomp_ordered *omp_stmt = as_a <gomp_ordered *> (stmt); |
| ret = walk_tree (gimple_omp_ordered_clauses_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_SCAN: |
| { |
| gomp_scan *scan_stmt = as_a <gomp_scan *> (stmt); |
| ret = walk_tree (gimple_omp_scan_clauses_ptr (scan_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_FOR: |
| ret = walk_tree (gimple_omp_for_clauses_ptr (stmt), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| for (i = 0; i < gimple_omp_for_collapse (stmt); i++) |
| { |
| ret = walk_tree (gimple_omp_for_index_ptr (stmt, i), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_for_initial_ptr (stmt, i), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_for_final_ptr (stmt, i), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_for_incr_ptr (stmt, i), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_PARALLEL: |
| { |
| gomp_parallel *omp_par_stmt = as_a <gomp_parallel *> (stmt); |
| ret = walk_tree (gimple_omp_parallel_clauses_ptr (omp_par_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_parallel_child_fn_ptr (omp_par_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_parallel_data_arg_ptr (omp_par_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_TASK: |
| ret = walk_tree (gimple_omp_task_clauses_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_task_child_fn_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_task_data_arg_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_task_copy_fn_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_task_arg_size_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_task_arg_align_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| break; |
| |
| case GIMPLE_OMP_SECTIONS: |
| ret = walk_tree (gimple_omp_sections_clauses_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_sections_control_ptr (stmt), callback_op, |
| wi, pset); |
| if (ret) |
| return ret; |
| |
| break; |
| |
| case GIMPLE_OMP_SINGLE: |
| ret = walk_tree (gimple_omp_single_clauses_ptr (stmt), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| break; |
| |
| case GIMPLE_OMP_TARGET: |
| { |
| gomp_target *omp_stmt = as_a <gomp_target *> (stmt); |
| ret = walk_tree (gimple_omp_target_clauses_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_target_child_fn_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_target_data_arg_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_TEAMS: |
| ret = walk_tree (gimple_omp_teams_clauses_ptr (stmt), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| break; |
| |
| case GIMPLE_OMP_ATOMIC_LOAD: |
| { |
| gomp_atomic_load *omp_stmt = as_a <gomp_atomic_load *> (stmt); |
| ret = walk_tree (gimple_omp_atomic_load_lhs_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_omp_atomic_load_rhs_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_ATOMIC_STORE: |
| { |
| gomp_atomic_store *omp_stmt = as_a <gomp_atomic_store *> (stmt); |
| ret = walk_tree (gimple_omp_atomic_store_val_ptr (omp_stmt), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_TRANSACTION: |
| { |
| gtransaction *txn = as_a <gtransaction *> (stmt); |
| |
| ret = walk_tree (gimple_transaction_label_norm_ptr (txn), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_transaction_label_uninst_ptr (txn), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| ret = walk_tree (gimple_transaction_label_over_ptr (txn), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| |
| case GIMPLE_OMP_RETURN: |
| ret = walk_tree (gimple_omp_return_lhs_ptr (stmt), callback_op, wi, |
| pset); |
| if (ret) |
| return ret; |
| break; |
| |
| /* Tuples that do not have operands. */ |
| case GIMPLE_NOP: |
| case GIMPLE_RESX: |
| case GIMPLE_PREDICT: |
| break; |
| |
| case GIMPLE_PHI: |
| /* PHIs are not GSS_WITH_OPS so we need to handle them explicitely. */ |
| { |
| gphi *phi = as_a <gphi *> (stmt); |
| if (wi) |
| { |
| wi->val_only = true; |
| wi->is_lhs = true; |
| } |
| ret = walk_tree (gimple_phi_result_ptr (phi), callback_op, wi, pset); |
| if (wi) |
| wi->is_lhs = false; |
| if (ret) |
| return ret; |
| for (unsigned i = 0; i < gimple_phi_num_args (phi); ++i) |
| { |
| ret = walk_tree (gimple_phi_arg_def_ptr (phi, i), |
| callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| break; |
| } |
| |
| default: |
| { |
| enum gimple_statement_structure_enum gss; |
| gss = gimple_statement_structure (stmt); |
| if (gss == GSS_WITH_OPS || gss == GSS_WITH_MEM_OPS) |
| for (i = 0; i < gimple_num_ops (stmt); i++) |
| { |
| ret = walk_tree (gimple_op_ptr (stmt, i), callback_op, wi, pset); |
| if (ret) |
| return ret; |
| } |
| } |
| break; |
| } |
| |
| return NULL_TREE; |
| } |
| |
| |
| /* Walk the current statement in GSI (optionally using traversal state |
| stored in WI). If WI is NULL, no state is kept during traversal. |
| The callback CALLBACK_STMT is called. If CALLBACK_STMT indicates |
| that it has handled all the operands of the statement, its return |
| value is returned. Otherwise, the return value from CALLBACK_STMT |
| is discarded and its operands are scanned. |
| |
| If CALLBACK_STMT is NULL or it didn't handle the operands, |
| CALLBACK_OP is called on each operand of the statement via |
| walk_gimple_op. If walk_gimple_op returns non-NULL for any |
| operand, the remaining operands are not scanned. In this case, the |
| return value from CALLBACK_OP is returned. |
| |
| In any other case, NULL_TREE is returned. */ |
| |
| tree |
| walk_gimple_stmt (gimple_stmt_iterator *gsi, walk_stmt_fn callback_stmt, |
| walk_tree_fn callback_op, struct walk_stmt_info *wi) |
| { |
| gimple *ret; |
| tree tree_ret; |
| gimple *stmt = gsi_stmt (*gsi); |
| |
| if (wi) |
| { |
| wi->gsi = *gsi; |
| wi->removed_stmt = false; |
| |
| if (wi->want_locations && gimple_has_location (stmt)) |
| input_location = gimple_location (stmt); |
| } |
| |
| ret = NULL; |
| |
| /* Invoke the statement callback. Return if the callback handled |
| all of STMT operands by itself. */ |
| if (callback_stmt) |
| { |
| bool handled_ops = false; |
| tree_ret = callback_stmt (gsi, &handled_ops, wi); |
| if (handled_ops) |
| return tree_ret; |
| |
| /* If CALLBACK_STMT did not handle operands, it should not have |
| a value to return. */ |
| gcc_assert (tree_ret == NULL); |
| |
| if (wi && wi->removed_stmt) |
| return NULL; |
| |
| /* Re-read stmt in case the callback changed it. */ |
| stmt = gsi_stmt (*gsi); |
| } |
| |
| /* If CALLBACK_OP is defined, invoke it on every operand of STMT. */ |
| if (callback_op) |
| { |
| tree_ret = walk_gimple_op (stmt, callback_op, wi); |
| if (tree_ret) |
| return tree_ret; |
| } |
| |
| /* If STMT can have statements inside (e.g. GIMPLE_BIND), walk them. */ |
| switch (gimple_code (stmt)) |
| { |
| case GIMPLE_BIND: |
| ret = walk_gimple_seq_mod (gimple_bind_body_ptr (as_a <gbind *> (stmt)), |
| callback_stmt, callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| case GIMPLE_CATCH: |
| ret = walk_gimple_seq_mod (gimple_catch_handler_ptr ( |
| as_a <gcatch *> (stmt)), |
| callback_stmt, callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| case GIMPLE_EH_FILTER: |
| ret = walk_gimple_seq_mod (gimple_eh_filter_failure_ptr (stmt), callback_stmt, |
| callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| case GIMPLE_EH_ELSE: |
| { |
| geh_else *eh_else_stmt = as_a <geh_else *> (stmt); |
| ret = walk_gimple_seq_mod (gimple_eh_else_n_body_ptr (eh_else_stmt), |
| callback_stmt, callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| ret = walk_gimple_seq_mod (gimple_eh_else_e_body_ptr (eh_else_stmt), |
| callback_stmt, callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| } |
| break; |
| |
| case GIMPLE_TRY: |
| ret = walk_gimple_seq_mod (gimple_try_eval_ptr (stmt), callback_stmt, callback_op, |
| wi); |
| if (ret) |
| return wi->callback_result; |
| |
| ret = walk_gimple_seq_mod (gimple_try_cleanup_ptr (stmt), callback_stmt, |
| callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| case GIMPLE_OMP_FOR: |
| ret = walk_gimple_seq_mod (gimple_omp_for_pre_body_ptr (stmt), callback_stmt, |
| callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| |
| /* FALL THROUGH. */ |
| case GIMPLE_OMP_CRITICAL: |
| case GIMPLE_OMP_MASTER: |
| case GIMPLE_OMP_TASKGROUP: |
| case GIMPLE_OMP_ORDERED: |
| case GIMPLE_OMP_SCAN: |
| case GIMPLE_OMP_SECTION: |
| case GIMPLE_OMP_PARALLEL: |
| case GIMPLE_OMP_TASK: |
| case GIMPLE_OMP_SECTIONS: |
| case GIMPLE_OMP_SINGLE: |
| case GIMPLE_OMP_TARGET: |
| case GIMPLE_OMP_TEAMS: |
| ret = walk_gimple_seq_mod (gimple_omp_body_ptr (stmt), callback_stmt, |
| callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| case GIMPLE_WITH_CLEANUP_EXPR: |
| ret = walk_gimple_seq_mod (gimple_wce_cleanup_ptr (stmt), callback_stmt, |
| callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| case GIMPLE_TRANSACTION: |
| ret = walk_gimple_seq_mod (gimple_transaction_body_ptr ( |
| as_a <gtransaction *> (stmt)), |
| callback_stmt, callback_op, wi); |
| if (ret) |
| return wi->callback_result; |
| break; |
| |
| default: |
| gcc_assert (!gimple_has_substatements (stmt)); |
| break; |
| } |
| |
| return NULL; |
| } |
| |
| /* From a tree operand OP return the base of a load or store operation |
| or NULL_TREE if OP is not a load or a store. */ |
| |
| static tree |
| get_base_loadstore (tree op) |
| { |
| while (handled_component_p (op)) |
| op = TREE_OPERAND (op, 0); |
| if (DECL_P (op) |
| || INDIRECT_REF_P (op) |
| || TREE_CODE (op) == MEM_REF |
| || TREE_CODE (op) == TARGET_MEM_REF) |
| return op; |
| return NULL_TREE; |
| } |
| |
| |
| /* For the statement STMT call the callbacks VISIT_LOAD, VISIT_STORE and |
| VISIT_ADDR if non-NULL on loads, store and address-taken operands |
| passing the STMT, the base of the operand, the operand itself containing |
| the base and DATA to it. The base will be either a decl, an indirect |
| reference (including TARGET_MEM_REF) or the argument of an address |
| expression. |
| Returns the results of these callbacks or'ed. */ |
| |
| bool |
| walk_stmt_load_store_addr_ops (gimple *stmt, void *data, |
| walk_stmt_load_store_addr_fn visit_load, |
| walk_stmt_load_store_addr_fn visit_store, |
| walk_stmt_load_store_addr_fn visit_addr) |
| { |
| bool ret = false; |
| unsigned i; |
| if (gimple_assign_single_p (stmt)) |
| { |
| tree lhs, rhs, arg; |
| if (visit_store) |
| { |
| arg = gimple_assign_lhs (stmt); |
| lhs = get_base_loadstore (arg); |
| if (lhs) |
| ret |= visit_store (stmt, lhs, arg, data); |
| } |
| arg = gimple_assign_rhs1 (stmt); |
| rhs = arg; |
| while (handled_component_p (rhs)) |
| rhs = TREE_OPERAND (rhs, 0); |
| if (visit_addr) |
| { |
| if (TREE_CODE (rhs) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (rhs, 0), arg, data); |
| else if (TREE_CODE (rhs) == TARGET_MEM_REF |
| && TREE_CODE (TMR_BASE (rhs)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (TMR_BASE (rhs), 0), arg, |
| data); |
| else if (TREE_CODE (rhs) == OBJ_TYPE_REF |
| && TREE_CODE (OBJ_TYPE_REF_OBJECT (rhs)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (OBJ_TYPE_REF_OBJECT (rhs), |
| 0), arg, data); |
| else if (TREE_CODE (rhs) == CONSTRUCTOR) |
| { |
| unsigned int ix; |
| tree val; |
| |
| FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (rhs), ix, val) |
| if (TREE_CODE (val) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (val, 0), arg, data); |
| else if (TREE_CODE (val) == OBJ_TYPE_REF |
| && TREE_CODE (OBJ_TYPE_REF_OBJECT (val)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, |
| TREE_OPERAND (OBJ_TYPE_REF_OBJECT (val), |
| 0), arg, data); |
| } |
| lhs = gimple_assign_lhs (stmt); |
| if (TREE_CODE (lhs) == TARGET_MEM_REF |
| && TREE_CODE (TMR_BASE (lhs)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (TMR_BASE (lhs), 0), lhs, data); |
| } |
| if (visit_load) |
| { |
| rhs = get_base_loadstore (rhs); |
| if (rhs) |
| ret |= visit_load (stmt, rhs, arg, data); |
| } |
| } |
| else if (visit_addr |
| && (is_gimple_assign (stmt) |
| || gimple_code (stmt) == GIMPLE_COND)) |
| { |
| for (i = 0; i < gimple_num_ops (stmt); ++i) |
| { |
| tree op = gimple_op (stmt, i); |
| if (op == NULL_TREE) |
| ; |
| else if (TREE_CODE (op) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (op, 0), op, data); |
| /* COND_EXPR and VCOND_EXPR rhs1 argument is a comparison |
| tree with two operands. */ |
| else if (i == 1 && COMPARISON_CLASS_P (op)) |
| { |
| if (TREE_CODE (TREE_OPERAND (op, 0)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (TREE_OPERAND (op, 0), |
| 0), op, data); |
| if (TREE_CODE (TREE_OPERAND (op, 1)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (TREE_OPERAND (op, 1), |
| 0), op, data); |
| } |
| } |
| } |
| else if (gcall *call_stmt = dyn_cast <gcall *> (stmt)) |
| { |
| if (visit_store) |
| { |
| tree arg = gimple_call_lhs (call_stmt); |
| if (arg) |
| { |
| tree lhs = get_base_loadstore (arg); |
| if (lhs) |
| ret |= visit_store (stmt, lhs, arg, data); |
| } |
| } |
| if (visit_load || visit_addr) |
| for (i = 0; i < gimple_call_num_args (call_stmt); ++i) |
| { |
| tree arg = gimple_call_arg (call_stmt, i); |
| if (visit_addr |
| && TREE_CODE (arg) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (arg, 0), arg, data); |
| else if (visit_load) |
| { |
| tree rhs = get_base_loadstore (arg); |
| if (rhs) |
| ret |= visit_load (stmt, rhs, arg, data); |
| } |
| } |
| if (visit_addr |
| && gimple_call_chain (call_stmt) |
| && TREE_CODE (gimple_call_chain (call_stmt)) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (gimple_call_chain (call_stmt), 0), |
| gimple_call_chain (call_stmt), data); |
| if (visit_addr |
| && gimple_call_return_slot_opt_p (call_stmt) |
| && gimple_call_lhs (call_stmt) != NULL_TREE |
| && TREE_ADDRESSABLE (TREE_TYPE (gimple_call_lhs (call_stmt)))) |
| ret |= visit_addr (stmt, gimple_call_lhs (call_stmt), |
| gimple_call_lhs (call_stmt), data); |
| } |
| else if (gasm *asm_stmt = dyn_cast <gasm *> (stmt)) |
| { |
| unsigned noutputs; |
| const char *constraint; |
| const char **oconstraints; |
| bool allows_mem, allows_reg, is_inout; |
| noutputs = gimple_asm_noutputs (asm_stmt); |
| oconstraints = XALLOCAVEC (const char *, noutputs); |
| if (visit_store || visit_addr) |
| for (i = 0; i < gimple_asm_noutputs (asm_stmt); ++i) |
| { |
| tree link = gimple_asm_output_op (asm_stmt, i); |
| tree op = get_base_loadstore (TREE_VALUE (link)); |
| if (op && visit_store) |
| ret |= visit_store (stmt, op, TREE_VALUE (link), data); |
| if (visit_addr) |
| { |
| constraint = TREE_STRING_POINTER |
| (TREE_VALUE (TREE_PURPOSE (link))); |
| oconstraints[i] = constraint; |
| parse_output_constraint (&constraint, i, 0, 0, &allows_mem, |
| &allows_reg, &is_inout); |
| if (op && !allows_reg && allows_mem) |
| ret |= visit_addr (stmt, op, TREE_VALUE (link), data); |
| } |
| } |
| if (visit_load || visit_addr) |
| for (i = 0; i < gimple_asm_ninputs (asm_stmt); ++i) |
| { |
| tree link = gimple_asm_input_op (asm_stmt, i); |
| tree op = TREE_VALUE (link); |
| if (visit_addr |
| && TREE_CODE (op) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (op, 0), op, data); |
| else if (visit_load || visit_addr) |
| { |
| op = get_base_loadstore (op); |
| if (op) |
| { |
| if (visit_load) |
| ret |= visit_load (stmt, op, TREE_VALUE (link), data); |
| if (visit_addr) |
| { |
| constraint = TREE_STRING_POINTER |
| (TREE_VALUE (TREE_PURPOSE (link))); |
| parse_input_constraint (&constraint, 0, 0, noutputs, |
| 0, oconstraints, |
| &allows_mem, &allows_reg); |
| if (!allows_reg && allows_mem) |
| ret |= visit_addr (stmt, op, TREE_VALUE (link), |
| data); |
| } |
| } |
| } |
| } |
| } |
| else if (greturn *return_stmt = dyn_cast <greturn *> (stmt)) |
| { |
| tree op = gimple_return_retval (return_stmt); |
| if (op) |
| { |
| if (visit_addr |
| && TREE_CODE (op) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (op, 0), op, data); |
| else if (visit_load) |
| { |
| tree base = get_base_loadstore (op); |
| if (base) |
| ret |= visit_load (stmt, base, op, data); |
| } |
| } |
| } |
| else if (visit_addr |
| && gimple_code (stmt) == GIMPLE_PHI) |
| { |
| for (i = 0; i < gimple_phi_num_args (stmt); ++i) |
| { |
| tree op = gimple_phi_arg_def (stmt, i); |
| if (TREE_CODE (op) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (op, 0), op, data); |
| } |
| } |
| else if (visit_addr |
| && gimple_code (stmt) == GIMPLE_GOTO) |
| { |
| tree op = gimple_goto_dest (stmt); |
| if (TREE_CODE (op) == ADDR_EXPR) |
| ret |= visit_addr (stmt, TREE_OPERAND (op, 0), op, data); |
| } |
| |
| return ret; |
| } |
| |
| /* Like walk_stmt_load_store_addr_ops but with NULL visit_addr. IPA-CP |
| should make a faster clone for this case. */ |
| |
| bool |
| walk_stmt_load_store_ops (gimple *stmt, void *data, |
| walk_stmt_load_store_addr_fn visit_load, |
| walk_stmt_load_store_addr_fn visit_store) |
| { |
| return walk_stmt_load_store_addr_ops (stmt, data, |
| visit_load, visit_store, NULL); |
| } |