/* Gimple walk support. Copyright (C) 2007-2015 Free Software Foundation, Inc. Contributed by Aldy Hernandez 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 . */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "tree.h" #include "stmt.h" #include "predict.h" #include "vec.h" #include "hashtab.h" #include "hash-set.h" #include "machmode.h" #include "hard-reg-set.h" #include "input.h" #include "function.h" #include "basic-block.h" #include "tree-ssa-alias.h" #include "internal-fn.h" #include "gimple-expr.h" #include "is-a.h" #include "gimple.h" #include "gimple-iterator.h" #include "gimple-walk.h" #include "gimple-walk.h" #include "demangle.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 *)); if (wi) wi->is_lhs = true; 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; parse_output_constraint (&constraint, i, 0, 0, &allows_mem, &allows_reg, &is_inout); if (wi) wi->val_only = (allows_reg || !allows_mem); 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))); parse_input_constraint (&constraint, 0, 0, noutputs, 0, oconstraints, &allows_mem, &allows_reg); if (wi) { 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 *pset = (wi) ? wi->pset : NULL; unsigned i; tree ret = NULL_TREE; 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 (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 (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 (stmt), callback_op, wi); if (ret) return ret; break; case GIMPLE_OMP_CONTINUE: { gomp_continue *cont_stmt = as_a (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 (stmt); ret = walk_tree (gimple_omp_critical_name_ptr (omp_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 (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 (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 (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 (stmt); ret = walk_tree (gimple_omp_atomic_store_val_ptr (omp_stmt), callback_op, wi, pset); if (ret) return ret; } break; case GIMPLE_TRANSACTION: ret = walk_tree (gimple_transaction_label_ptr ( as_a (stmt)), 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; 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 (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 (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 (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_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 (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 (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 (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 (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); }