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Diffstat (limited to 'gcc/gimple-walk.c')
| -rw-r--r-- | gcc/gimple-walk.c | 871 |
1 files changed, 871 insertions, 0 deletions
diff --git a/gcc/gimple-walk.c b/gcc/gimple-walk.c new file mode 100644 index 00000000000..deb4673354a --- /dev/null +++ b/gcc/gimple-walk.c @@ -0,0 +1,871 @@ +/* Gimple walk support. + + Copyright (C) 2007-2013 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 "tm.h" +#include "tree.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 (gimple 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) +{ + struct pointer_set_t *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 (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 (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 (stmt, callback_op, wi); + if (ret) + return ret; + break; + + case GIMPLE_OMP_CONTINUE: + ret = walk_tree (gimple_omp_continue_control_def_ptr (stmt), + callback_op, wi, pset); + if (ret) + return ret; + + ret = walk_tree (gimple_omp_continue_control_use_ptr (stmt), + callback_op, wi, pset); + if (ret) + return ret; + break; + + case GIMPLE_OMP_CRITICAL: + ret = walk_tree (gimple_omp_critical_name_ptr (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: + ret = walk_tree (gimple_omp_parallel_clauses_ptr (stmt), callback_op, + wi, pset); + if (ret) + return ret; + ret = walk_tree (gimple_omp_parallel_child_fn_ptr (stmt), callback_op, + wi, pset); + if (ret) + return ret; + ret = walk_tree (gimple_omp_parallel_data_arg_ptr (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: + ret = walk_tree (gimple_omp_target_clauses_ptr (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: + ret = walk_tree (gimple_omp_atomic_load_lhs_ptr (stmt), callback_op, wi, + pset); + if (ret) + return ret; + + ret = walk_tree (gimple_omp_atomic_load_rhs_ptr (stmt), callback_op, wi, + pset); + if (ret) + return ret; + break; + + case GIMPLE_OMP_ATOMIC_STORE: + ret = walk_tree (gimple_omp_atomic_store_val_ptr (stmt), callback_op, + wi, pset); + if (ret) + return ret; + break; + + case GIMPLE_TRANSACTION: + ret = walk_tree (gimple_transaction_label_ptr (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 (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 (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: + ret = walk_gimple_seq_mod (gimple_eh_else_n_body_ptr (stmt), + callback_stmt, callback_op, wi); + if (ret) + return wi->callback_result; + ret = walk_gimple_seq_mod (gimple_eh_else_e_body_ptr (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 (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 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, + bool (*visit_load)(gimple, tree, void *), + bool (*visit_store)(gimple, tree, void *), + bool (*visit_addr)(gimple, tree, void *)) +{ + bool ret = false; + unsigned i; + if (gimple_assign_single_p (stmt)) + { + tree lhs, rhs; + if (visit_store) + { + lhs = get_base_loadstore (gimple_assign_lhs (stmt)); + if (lhs) + ret |= visit_store (stmt, lhs, data); + } + rhs = gimple_assign_rhs1 (stmt); + 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), 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), 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), 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), 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), 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), data); + } + if (visit_load) + { + rhs = get_base_loadstore (rhs); + if (rhs) + ret |= visit_load (stmt, rhs, 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), 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), data); + if (TREE_CODE (TREE_OPERAND (op, 1)) == ADDR_EXPR) + ret |= visit_addr (stmt, TREE_OPERAND (TREE_OPERAND (op, 1), + 0), data); + } + } + } + else if (is_gimple_call (stmt)) + { + if (visit_store) + { + tree lhs = gimple_call_lhs (stmt); + if (lhs) + { + lhs = get_base_loadstore (lhs); + if (lhs) + ret |= visit_store (stmt, lhs, data); + } + } + if (visit_load || visit_addr) + for (i = 0; i < gimple_call_num_args (stmt); ++i) + { + tree rhs = gimple_call_arg (stmt, i); + if (visit_addr + && TREE_CODE (rhs) == ADDR_EXPR) + ret |= visit_addr (stmt, TREE_OPERAND (rhs, 0), data); + else if (visit_load) + { + rhs = get_base_loadstore (rhs); + if (rhs) + ret |= visit_load (stmt, rhs, data); + } + } + if (visit_addr + && gimple_call_chain (stmt) + && TREE_CODE (gimple_call_chain (stmt)) == ADDR_EXPR) + ret |= visit_addr (stmt, TREE_OPERAND (gimple_call_chain (stmt), 0), + data); + if (visit_addr + && gimple_call_return_slot_opt_p (stmt) + && gimple_call_lhs (stmt) != NULL_TREE + && TREE_ADDRESSABLE (TREE_TYPE (gimple_call_lhs (stmt)))) + ret |= visit_addr (stmt, gimple_call_lhs (stmt), data); + } + else if (gimple_code (stmt) == GIMPLE_ASM) + { + unsigned noutputs; + const char *constraint; + const char **oconstraints; + bool allows_mem, allows_reg, is_inout; + noutputs = gimple_asm_noutputs (stmt); + oconstraints = XALLOCAVEC (const char *, noutputs); + if (visit_store || visit_addr) + for (i = 0; i < gimple_asm_noutputs (stmt); ++i) + { + tree link = gimple_asm_output_op (stmt, i); + tree op = get_base_loadstore (TREE_VALUE (link)); + if (op && visit_store) + ret |= visit_store (stmt, op, 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, data); + } + } + if (visit_load || visit_addr) + for (i = 0; i < gimple_asm_ninputs (stmt); ++i) + { + tree link = gimple_asm_input_op (stmt, i); + tree op = TREE_VALUE (link); + if (visit_addr + && TREE_CODE (op) == ADDR_EXPR) + ret |= visit_addr (stmt, TREE_OPERAND (op, 0), data); + else if (visit_load || visit_addr) + { + op = get_base_loadstore (op); + if (op) + { + if (visit_load) + ret |= visit_load (stmt, op, 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, data); + } + } + } + } + } + else if (gimple_code (stmt) == GIMPLE_RETURN) + { + tree op = gimple_return_retval (stmt); + if (op) + { + if (visit_addr + && TREE_CODE (op) == ADDR_EXPR) + ret |= visit_addr (stmt, TREE_OPERAND (op, 0), data); + else if (visit_load) + { + op = get_base_loadstore (op); + if (op) + ret |= visit_load (stmt, 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), 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), 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, + bool (*visit_load)(gimple, tree, void *), + bool (*visit_store)(gimple, tree, void *)) +{ + return walk_stmt_load_store_addr_ops (stmt, data, + visit_load, visit_store, NULL); +} |