/* Inline functions for tree-flow.h Copyright (C) 2001, 2003, 2005 Free Software Foundation, Inc. Contributed by Diego Novillo 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 2, 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 COPYING. If not, write to the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef _TREE_FLOW_INLINE_H #define _TREE_FLOW_INLINE_H 1 /* Inline functions for manipulating various data structures defined in tree-flow.h. See tree-flow.h for documentation. */ /* Initialize the hashtable iterator HTI to point to hashtable TABLE */ static inline void * first_htab_element (htab_iterator *hti, htab_t table) { hti->htab = table; hti->slot = table->entries; hti->limit = hti->slot + htab_size (table); do { PTR x = *(hti->slot); if (x != HTAB_EMPTY_ENTRY && x != HTAB_DELETED_ENTRY) break; } while (++(hti->slot) < hti->limit); if (hti->slot < hti->limit) return *(hti->slot); return NULL; } /* Return current non-empty/deleted slot of the hashtable pointed to by HTI, or NULL if we have reached the end. */ static inline bool end_htab_p (htab_iterator *hti) { if (hti->slot >= hti->limit) return true; return false; } /* Advance the hashtable iterator pointed to by HTI to the next element of the hashtable. */ static inline void * next_htab_element (htab_iterator *hti) { while (++(hti->slot) < hti->limit) { PTR x = *(hti->slot); if (x != HTAB_EMPTY_ENTRY && x != HTAB_DELETED_ENTRY) return x; }; return NULL; } /* Initialize ITER to point to the first referenced variable in the referenced_vars hashtable, and return that variable. */ static inline tree first_referenced_var (referenced_var_iterator *iter) { struct int_tree_map *itm; itm = first_htab_element (&iter->hti, referenced_vars); if (!itm) return NULL; return itm->to; } /* Return true if we have hit the end of the referenced variables ITER is iterating through. */ static inline bool end_referenced_vars_p (referenced_var_iterator *iter) { return end_htab_p (&iter->hti); } /* Make ITER point to the next referenced_var in the referenced_var hashtable, and return that variable. */ static inline tree next_referenced_var (referenced_var_iterator *iter) { struct int_tree_map *itm; itm = next_htab_element (&iter->hti); if (!itm) return NULL; return itm->to; } /* Fill up VEC with the variables in the referenced vars hashtable. */ static inline void fill_referenced_var_vec (VEC (tree, heap) **vec) { referenced_var_iterator rvi; tree var; *vec = NULL; FOR_EACH_REFERENCED_VAR (var, rvi) VEC_safe_push (tree, heap, *vec, var); } /* Return the variable annotation for T, which must be a _DECL node. Return NULL if the variable annotation doesn't already exist. */ static inline var_ann_t var_ann (tree t) { gcc_assert (t); gcc_assert (DECL_P (t)); gcc_assert (!t->common.ann || t->common.ann->common.type == VAR_ANN); return (var_ann_t) t->common.ann; } /* Return the variable annotation for T, which must be a _DECL node. Create the variable annotation if it doesn't exist. */ static inline var_ann_t get_var_ann (tree var) { var_ann_t ann = var_ann (var); return (ann) ? ann : create_var_ann (var); } /* Return the statement annotation for T, which must be a statement node. Return NULL if the statement annotation doesn't exist. */ static inline stmt_ann_t stmt_ann (tree t) { #ifdef ENABLE_CHECKING gcc_assert (is_gimple_stmt (t)); #endif return (stmt_ann_t) t->common.ann; } /* Return the statement annotation for T, which must be a statement node. Create the statement annotation if it doesn't exist. */ static inline stmt_ann_t get_stmt_ann (tree stmt) { stmt_ann_t ann = stmt_ann (stmt); return (ann) ? ann : create_stmt_ann (stmt); } /* Return the annotation type for annotation ANN. */ static inline enum tree_ann_type ann_type (tree_ann_t ann) { return ann->common.type; } /* Return the basic block for statement T. */ static inline basic_block bb_for_stmt (tree t) { stmt_ann_t ann; if (TREE_CODE (t) == PHI_NODE) return PHI_BB (t); ann = stmt_ann (t); return ann ? ann->bb : NULL; } /* Return the may_aliases varray for variable VAR, or NULL if it has no may aliases. */ static inline varray_type may_aliases (tree var) { var_ann_t ann = var_ann (var); return ann ? ann->may_aliases : NULL; } /* Return the line number for EXPR, or return -1 if we have no line number information for it. */ static inline int get_lineno (tree expr) { if (expr == NULL_TREE) return -1; if (TREE_CODE (expr) == COMPOUND_EXPR) expr = TREE_OPERAND (expr, 0); if (! EXPR_HAS_LOCATION (expr)) return -1; return EXPR_LINENO (expr); } /* Return the file name for EXPR, or return "???" if we have no filename information. */ static inline const char * get_filename (tree expr) { const char *filename; if (expr == NULL_TREE) return "???"; if (TREE_CODE (expr) == COMPOUND_EXPR) expr = TREE_OPERAND (expr, 0); if (EXPR_HAS_LOCATION (expr) && (filename = EXPR_FILENAME (expr))) return filename; else return "???"; } /* Return true if T is a noreturn call. */ static inline bool noreturn_call_p (tree t) { tree call = get_call_expr_in (t); return call != 0 && (call_expr_flags (call) & ECF_NORETURN) != 0; } /* Mark statement T as modified. */ static inline void mark_stmt_modified (tree t) { stmt_ann_t ann; if (TREE_CODE (t) == PHI_NODE) return; ann = stmt_ann (t); if (ann == NULL) ann = create_stmt_ann (t); else if (noreturn_call_p (t)) VEC_safe_push (tree, gc, modified_noreturn_calls, t); ann->modified = 1; } /* Mark statement T as modified, and update it. */ static inline void update_stmt (tree t) { if (TREE_CODE (t) == PHI_NODE) return; mark_stmt_modified (t); update_stmt_operands (t); } static inline void update_stmt_if_modified (tree t) { if (stmt_modified_p (t)) update_stmt_operands (t); } /* Return true if T is marked as modified, false otherwise. */ static inline bool stmt_modified_p (tree t) { stmt_ann_t ann = stmt_ann (t); /* Note that if the statement doesn't yet have an annotation, we consider it modified. This will force the next call to update_stmt_operands to scan the statement. */ return ann ? ann->modified : true; } /* Delink an immediate_uses node from its chain. */ static inline void delink_imm_use (ssa_use_operand_t *linknode) { /* Return if this node is not in a list. */ if (linknode->prev == NULL) return; linknode->prev->next = linknode->next; linknode->next->prev = linknode->prev; linknode->prev = NULL; linknode->next = NULL; } /* Link ssa_imm_use node LINKNODE into the chain for LIST. */ static inline void link_imm_use_to_list (ssa_use_operand_t *linknode, ssa_use_operand_t *list) { /* Link the new node at the head of the list. If we are in the process of traversing the list, we won't visit any new nodes added to it. */ linknode->prev = list; linknode->next = list->next; list->next->prev = linknode; list->next = linknode; } /* Link ssa_imm_use node LINKNODE into the chain for DEF. */ static inline void link_imm_use (ssa_use_operand_t *linknode, tree def) { ssa_use_operand_t *root; if (!def || TREE_CODE (def) != SSA_NAME) linknode->prev = NULL; else { root = &(SSA_NAME_IMM_USE_NODE (def)); #ifdef ENABLE_CHECKING if (linknode->use) gcc_assert (*(linknode->use) == def); #endif link_imm_use_to_list (linknode, root); } } /* Set the value of a use pointed to by USE to VAL. */ static inline void set_ssa_use_from_ptr (use_operand_p use, tree val) { delink_imm_use (use); *(use->use) = val; link_imm_use (use, val); } /* Link ssa_imm_use node LINKNODE into the chain for DEF, with use occurring in STMT. */ static inline void link_imm_use_stmt (ssa_use_operand_t *linknode, tree def, tree stmt) { if (stmt) link_imm_use (linknode, def); else link_imm_use (linknode, NULL); linknode->stmt = stmt; } /* Relink a new node in place of an old node in the list. */ static inline void relink_imm_use (ssa_use_operand_t *node, ssa_use_operand_t *old) { /* The node one had better be in the same list. */ gcc_assert (*(old->use) == *(node->use)); node->prev = old->prev; node->next = old->next; if (old->prev) { old->prev->next = node; old->next->prev = node; /* Remove the old node from the list. */ old->prev = NULL; } } /* Relink ssa_imm_use node LINKNODE into the chain for OLD, with use occurring in STMT. */ static inline void relink_imm_use_stmt (ssa_use_operand_t *linknode, ssa_use_operand_t *old, tree stmt) { if (stmt) relink_imm_use (linknode, old); else link_imm_use (linknode, NULL); linknode->stmt = stmt; } /* Finished the traverse of an immediate use list IMM by removing it from the list. */ static inline void end_safe_imm_use_traverse (imm_use_iterator *imm) { delink_imm_use (&(imm->iter_node)); } /* Return true if IMM is at the end of the list. */ static inline bool end_safe_imm_use_p (imm_use_iterator *imm) { return (imm->imm_use == imm->end_p); } /* Initialize iterator IMM to process the list for VAR. */ static inline use_operand_p first_safe_imm_use (imm_use_iterator *imm, tree var) { /* Set up and link the iterator node into the linked list for VAR. */ imm->iter_node.use = NULL; imm->iter_node.stmt = NULL_TREE; imm->end_p = &(SSA_NAME_IMM_USE_NODE (var)); /* Check if there are 0 elements. */ if (imm->end_p->next == imm->end_p) { imm->imm_use = imm->end_p; return NULL_USE_OPERAND_P; } link_imm_use (&(imm->iter_node), var); imm->imm_use = imm->iter_node.next; return imm->imm_use; } /* Bump IMM to the next use in the list. */ static inline use_operand_p next_safe_imm_use (imm_use_iterator *imm) { ssa_use_operand_t *ptr; use_operand_p old; old = imm->imm_use; /* If the next node following the iter_node is still the one referred to by imm_use, then the list hasn't changed, go to the next node. */ if (imm->iter_node.next == imm->imm_use) { ptr = &(imm->iter_node); /* Remove iternode from the list. */ delink_imm_use (ptr); imm->imm_use = imm->imm_use->next; if (! end_safe_imm_use_p (imm)) { /* This isn't the end, link iternode before the next use. */ ptr->prev = imm->imm_use->prev; ptr->next = imm->imm_use; imm->imm_use->prev->next = ptr; imm->imm_use->prev = ptr; } else return old; } else { /* If the 'next' value after the iterator isn't the same as it was, then a node has been deleted, so we simply proceed to the node following where the iterator is in the list. */ imm->imm_use = imm->iter_node.next; if (end_safe_imm_use_p (imm)) { end_safe_imm_use_traverse (imm); return old; } } return imm->imm_use; } /* Return true is IMM has reached the end of the immediate use list. */ static inline bool end_readonly_imm_use_p (imm_use_iterator *imm) { return (imm->imm_use == imm->end_p); } /* Initialize iterator IMM to process the list for VAR. */ static inline use_operand_p first_readonly_imm_use (imm_use_iterator *imm, tree var) { gcc_assert (TREE_CODE (var) == SSA_NAME); imm->end_p = &(SSA_NAME_IMM_USE_NODE (var)); imm->imm_use = imm->end_p->next; #ifdef ENABLE_CHECKING imm->iter_node.next = imm->imm_use->next; #endif if (end_readonly_imm_use_p (imm)) return NULL_USE_OPERAND_P; return imm->imm_use; } /* Bump IMM to the next use in the list. */ static inline use_operand_p next_readonly_imm_use (imm_use_iterator *imm) { use_operand_p old = imm->imm_use; #ifdef ENABLE_CHECKING /* If this assertion fails, it indicates the 'next' pointer has changed since we the last bump. This indicates that the list is being modified via stmt changes, or SET_USE, or somesuch thing, and you need to be using the SAFE version of the iterator. */ gcc_assert (imm->iter_node.next == old->next); imm->iter_node.next = old->next->next; #endif imm->imm_use = old->next; if (end_readonly_imm_use_p (imm)) return old; return imm->imm_use; } /* Return true if VAR has no uses. */ static inline bool has_zero_uses (tree var) { ssa_use_operand_t *ptr; ptr = &(SSA_NAME_IMM_USE_NODE (var)); /* A single use means there is no items in the list. */ return (ptr == ptr->next); } /* Return true if VAR has a single use. */ static inline bool has_single_use (tree var) { ssa_use_operand_t *ptr; ptr = &(SSA_NAME_IMM_USE_NODE (var)); /* A single use means there is one item in the list. */ return (ptr != ptr->next && ptr == ptr->next->next); } /* If VAR has only a single immediate use, return true, and set USE_P and STMT to the use pointer and stmt of occurrence. */ static inline bool single_imm_use (tree var, use_operand_p *use_p, tree *stmt) { ssa_use_operand_t *ptr; ptr = &(SSA_NAME_IMM_USE_NODE (var)); if (ptr != ptr->next && ptr == ptr->next->next) { *use_p = ptr->next; *stmt = ptr->next->stmt; return true; } *use_p = NULL_USE_OPERAND_P; *stmt = NULL_TREE; return false; } /* Return the number of immediate uses of VAR. */ static inline unsigned int num_imm_uses (tree var) { ssa_use_operand_t *ptr, *start; unsigned int num; start = &(SSA_NAME_IMM_USE_NODE (var)); num = 0; for (ptr = start->next; ptr != start; ptr = ptr->next) num++; return num; } /* Return the tree pointer to by USE. */ static inline tree get_use_from_ptr (use_operand_p use) { return *(use->use); } /* Return the tree pointer to by DEF. */ static inline tree get_def_from_ptr (def_operand_p def) { return *def; } /* Return a def_operand_p pointer for the result of PHI. */ static inline def_operand_p get_phi_result_ptr (tree phi) { return &(PHI_RESULT_TREE (phi)); } /* Return a use_operand_p pointer for argument I of phinode PHI. */ static inline use_operand_p get_phi_arg_def_ptr (tree phi, int i) { return &(PHI_ARG_IMM_USE_NODE (phi,i)); } /* Return the bitmap of addresses taken by STMT, or NULL if it takes no addresses. */ static inline bitmap addresses_taken (tree stmt) { stmt_ann_t ann = stmt_ann (stmt); return ann ? ann->addresses_taken : NULL; } /* Return the PHI nodes for basic block BB, or NULL if there are no PHI nodes. */ static inline tree phi_nodes (basic_block bb) { return bb->phi_nodes; } /* Set list of phi nodes of a basic block BB to L. */ static inline void set_phi_nodes (basic_block bb, tree l) { tree phi; bb->phi_nodes = l; for (phi = l; phi; phi = PHI_CHAIN (phi)) set_bb_for_stmt (phi, bb); } /* Return the phi argument which contains the specified use. */ static inline int phi_arg_index_from_use (use_operand_p use) { struct phi_arg_d *element, *root; int index; tree phi; /* Since the use is the first thing in a PHI argument element, we can calculate its index based on casting it to an argument, and performing pointer arithmetic. */ phi = USE_STMT (use); gcc_assert (TREE_CODE (phi) == PHI_NODE); element = (struct phi_arg_d *)use; root = &(PHI_ARG_ELT (phi, 0)); index = element - root; #ifdef ENABLE_CHECKING /* Make sure the calculation doesn't have any leftover bytes. If it does, then imm_use is likely not the first element in phi_arg_d. */ gcc_assert ( (((char *)element - (char *)root) % sizeof (struct phi_arg_d)) == 0); gcc_assert (index >= 0 && index < PHI_ARG_CAPACITY (phi)); #endif return index; } /* Mark VAR as used, so that it'll be preserved during rtl expansion. */ static inline void set_is_used (tree var) { var_ann_t ann = get_var_ann (var); ann->used = 1; } /* ----------------------------------------------------------------------- */ /* Return true if T is an executable statement. */ static inline bool is_exec_stmt (tree t) { return (t && !IS_EMPTY_STMT (t) && t != error_mark_node); } /* Return true if this stmt can be the target of a control transfer stmt such as a goto. */ static inline bool is_label_stmt (tree t) { if (t) switch (TREE_CODE (t)) { case LABEL_DECL: case LABEL_EXPR: case CASE_LABEL_EXPR: return true; default: return false; } return false; } /* Set the default definition for VAR to DEF. */ static inline void set_default_def (tree var, tree def) { var_ann_t ann = get_var_ann (var); ann->default_def = def; } /* Return the default definition for variable VAR, or NULL if none exists. */ static inline tree default_def (tree var) { var_ann_t ann = var_ann (var); return ann ? ann->default_def : NULL_TREE; } /* PHI nodes should contain only ssa_names and invariants. A test for ssa_name is definitely simpler; don't let invalid contents slip in in the meantime. */ static inline bool phi_ssa_name_p (tree t) { if (TREE_CODE (t) == SSA_NAME) return true; #ifdef ENABLE_CHECKING gcc_assert (is_gimple_min_invariant (t)); #endif return false; } /* ----------------------------------------------------------------------- */ /* Return a block_stmt_iterator that points to beginning of basic block BB. */ static inline block_stmt_iterator bsi_start (basic_block bb) { block_stmt_iterator bsi; if (bb->stmt_list) bsi.tsi = tsi_start (bb->stmt_list); else { gcc_assert (bb->index < 0); bsi.tsi.ptr = NULL; bsi.tsi.container = NULL; } bsi.bb = bb; return bsi; } /* Return a block statement iterator that points to the first non-label statement in block BB. */ static inline block_stmt_iterator bsi_after_labels (basic_block bb) { block_stmt_iterator bsi = bsi_start (bb); while (!bsi_end_p (bsi) && TREE_CODE (bsi_stmt (bsi)) == LABEL_EXPR) bsi_next (&bsi); return bsi; } /* Return a block statement iterator that points to the end of basic block BB. */ static inline block_stmt_iterator bsi_last (basic_block bb) { block_stmt_iterator bsi; if (bb->stmt_list) bsi.tsi = tsi_last (bb->stmt_list); else { gcc_assert (bb->index < 0); bsi.tsi.ptr = NULL; bsi.tsi.container = NULL; } bsi.bb = bb; return bsi; } /* Return true if block statement iterator I has reached the end of the basic block. */ static inline bool bsi_end_p (block_stmt_iterator i) { return tsi_end_p (i.tsi); } /* Modify block statement iterator I so that it is at the next statement in the basic block. */ static inline void bsi_next (block_stmt_iterator *i) { tsi_next (&i->tsi); } /* Modify block statement iterator I so that it is at the previous statement in the basic block. */ static inline void bsi_prev (block_stmt_iterator *i) { tsi_prev (&i->tsi); } /* Return the statement that block statement iterator I is currently at. */ static inline tree bsi_stmt (block_stmt_iterator i) { return tsi_stmt (i.tsi); } /* Return a pointer to the statement that block statement iterator I is currently at. */ static inline tree * bsi_stmt_ptr (block_stmt_iterator i) { return tsi_stmt_ptr (i.tsi); } /* Returns the loop of the statement STMT. */ static inline struct loop * loop_containing_stmt (tree stmt) { basic_block bb = bb_for_stmt (stmt); if (!bb) return NULL; return bb->loop_father; } /* Return true if VAR is a clobbered by function calls. */ static inline bool is_call_clobbered (tree var) { return is_global_var (var) || bitmap_bit_p (call_clobbered_vars, DECL_UID (var)); } /* Mark variable VAR as being clobbered by function calls. */ static inline void mark_call_clobbered (tree var) { var_ann_t ann = var_ann (var); /* If VAR is a memory tag, then we need to consider it a global variable. This is because the pointer that VAR represents has been found to point to either an arbitrary location or to a known location in global memory. */ if (ann->mem_tag_kind != NOT_A_TAG && ann->mem_tag_kind != STRUCT_FIELD) DECL_EXTERNAL (var) = 1; bitmap_set_bit (call_clobbered_vars, DECL_UID (var)); ssa_call_clobbered_cache_valid = false; ssa_ro_call_cache_valid = false; } /* Clear the call-clobbered attribute from variable VAR. */ static inline void clear_call_clobbered (tree var) { var_ann_t ann = var_ann (var); if (ann->mem_tag_kind != NOT_A_TAG && ann->mem_tag_kind != STRUCT_FIELD) DECL_EXTERNAL (var) = 0; bitmap_clear_bit (call_clobbered_vars, DECL_UID (var)); ssa_call_clobbered_cache_valid = false; ssa_ro_call_cache_valid = false; } /* Mark variable VAR as being non-addressable. */ static inline void mark_non_addressable (tree var) { bitmap_clear_bit (call_clobbered_vars, DECL_UID (var)); TREE_ADDRESSABLE (var) = 0; ssa_call_clobbered_cache_valid = false; ssa_ro_call_cache_valid = false; } /* Return the common annotation for T. Return NULL if the annotation doesn't already exist. */ static inline tree_ann_t tree_ann (tree t) { return t->common.ann; } /* Return a common annotation for T. Create the constant annotation if it doesn't exist. */ static inline tree_ann_t get_tree_ann (tree t) { tree_ann_t ann = tree_ann (t); return (ann) ? ann : create_tree_ann (t); } /* ----------------------------------------------------------------------- */ /* The following set of routines are used to iterator over various type of SSA operands. */ /* Return true if PTR is finished iterating. */ static inline bool op_iter_done (ssa_op_iter *ptr) { return ptr->done; } /* Get the next iterator use value for PTR. */ static inline use_operand_p op_iter_next_use (ssa_op_iter *ptr) { use_operand_p use_p; #ifdef ENABLE_CHECKING gcc_assert (ptr->iter_type == ssa_op_iter_use); #endif if (ptr->uses) { use_p = USE_OP_PTR (ptr->uses); ptr->uses = ptr->uses->next; return use_p; } if (ptr->vuses) { use_p = VUSE_OP_PTR (ptr->vuses); ptr->vuses = ptr->vuses->next; return use_p; } if (ptr->mayuses) { use_p = MAYDEF_OP_PTR (ptr->mayuses); ptr->mayuses = ptr->mayuses->next; return use_p; } if (ptr->mustkills) { use_p = MUSTDEF_KILL_PTR (ptr->mustkills); ptr->mustkills = ptr->mustkills->next; return use_p; } if (ptr->phi_i < ptr->num_phi) { return PHI_ARG_DEF_PTR (ptr->phi_stmt, (ptr->phi_i)++); } ptr->done = true; return NULL_USE_OPERAND_P; } /* Get the next iterator def value for PTR. */ static inline def_operand_p op_iter_next_def (ssa_op_iter *ptr) { def_operand_p def_p; #ifdef ENABLE_CHECKING gcc_assert (ptr->iter_type == ssa_op_iter_def); #endif if (ptr->defs) { def_p = DEF_OP_PTR (ptr->defs); ptr->defs = ptr->defs->next; return def_p; } if (ptr->mustdefs) { def_p = MUSTDEF_RESULT_PTR (ptr->mustdefs); ptr->mustdefs = ptr->mustdefs->next; return def_p; } if (ptr->maydefs) { def_p = MAYDEF_RESULT_PTR (ptr->maydefs); ptr->maydefs = ptr->maydefs->next; return def_p; } ptr->done = true; return NULL_DEF_OPERAND_P; } /* Get the next iterator tree value for PTR. */ static inline tree op_iter_next_tree (ssa_op_iter *ptr) { tree val; #ifdef ENABLE_CHECKING gcc_assert (ptr->iter_type == ssa_op_iter_tree); #endif if (ptr->uses) { val = USE_OP (ptr->uses); ptr->uses = ptr->uses->next; return val; } if (ptr->vuses) { val = VUSE_OP (ptr->vuses); ptr->vuses = ptr->vuses->next; return val; } if (ptr->mayuses) { val = MAYDEF_OP (ptr->mayuses); ptr->mayuses = ptr->mayuses->next; return val; } if (ptr->mustkills) { val = MUSTDEF_KILL (ptr->mustkills); ptr->mustkills = ptr->mustkills->next; return val; } if (ptr->defs) { val = DEF_OP (ptr->defs); ptr->defs = ptr->defs->next; return val; } if (ptr->mustdefs) { val = MUSTDEF_RESULT (ptr->mustdefs); ptr->mustdefs = ptr->mustdefs->next; return val; } if (ptr->maydefs) { val = MAYDEF_RESULT (ptr->maydefs); ptr->maydefs = ptr->maydefs->next; return val; } ptr->done = true; return NULL_TREE; } /* This functions clears the iterator PTR, and marks it done. This is normally used to prevent warnings in the compile about might be uninitialized components. */ static inline void clear_and_done_ssa_iter (ssa_op_iter *ptr) { ptr->defs = NULL; ptr->uses = NULL; ptr->vuses = NULL; ptr->maydefs = NULL; ptr->mayuses = NULL; ptr->mustdefs = NULL; ptr->mustkills = NULL; ptr->iter_type = ssa_op_iter_none; ptr->phi_i = 0; ptr->num_phi = 0; ptr->phi_stmt = NULL_TREE; ptr->done = true; } /* Initialize the iterator PTR to the virtual defs in STMT. */ static inline void op_iter_init (ssa_op_iter *ptr, tree stmt, int flags) { #ifdef ENABLE_CHECKING gcc_assert (stmt_ann (stmt)); #endif ptr->defs = (flags & SSA_OP_DEF) ? DEF_OPS (stmt) : NULL; ptr->uses = (flags & SSA_OP_USE) ? USE_OPS (stmt) : NULL; ptr->vuses = (flags & SSA_OP_VUSE) ? VUSE_OPS (stmt) : NULL; ptr->maydefs = (flags & SSA_OP_VMAYDEF) ? MAYDEF_OPS (stmt) : NULL; ptr->mayuses = (flags & SSA_OP_VMAYUSE) ? MAYDEF_OPS (stmt) : NULL; ptr->mustdefs = (flags & SSA_OP_VMUSTDEF) ? MUSTDEF_OPS (stmt) : NULL; ptr->mustkills = (flags & SSA_OP_VMUSTKILL) ? MUSTDEF_OPS (stmt) : NULL; ptr->done = false; ptr->phi_i = 0; ptr->num_phi = 0; ptr->phi_stmt = NULL_TREE; } /* Initialize iterator PTR to the use operands in STMT based on FLAGS. Return the first use. */ static inline use_operand_p op_iter_init_use (ssa_op_iter *ptr, tree stmt, int flags) { gcc_assert ((flags & SSA_OP_ALL_DEFS) == 0); op_iter_init (ptr, stmt, flags); ptr->iter_type = ssa_op_iter_use; return op_iter_next_use (ptr); } /* Initialize iterator PTR to the def operands in STMT based on FLAGS. Return the first def. */ static inline def_operand_p op_iter_init_def (ssa_op_iter *ptr, tree stmt, int flags) { gcc_assert ((flags & (SSA_OP_ALL_USES | SSA_OP_VIRTUAL_KILLS)) == 0); op_iter_init (ptr, stmt, flags); ptr->iter_type = ssa_op_iter_def; return op_iter_next_def (ptr); } /* Initialize iterator PTR to the operands in STMT based on FLAGS. Return the first operand as a tree. */ static inline tree op_iter_init_tree (ssa_op_iter *ptr, tree stmt, int flags) { op_iter_init (ptr, stmt, flags); ptr->iter_type = ssa_op_iter_tree; return op_iter_next_tree (ptr); } /* Get the next iterator mustdef value for PTR, returning the mustdef values in KILL and DEF. */ static inline void op_iter_next_maymustdef (use_operand_p *use, def_operand_p *def, ssa_op_iter *ptr) { #ifdef ENABLE_CHECKING gcc_assert (ptr->iter_type == ssa_op_iter_maymustdef); #endif if (ptr->mayuses) { *def = MAYDEF_RESULT_PTR (ptr->mayuses); *use = MAYDEF_OP_PTR (ptr->mayuses); ptr->mayuses = ptr->mayuses->next; return; } if (ptr->mustkills) { *def = MUSTDEF_RESULT_PTR (ptr->mustkills); *use = MUSTDEF_KILL_PTR (ptr->mustkills); ptr->mustkills = ptr->mustkills->next; return; } *def = NULL_DEF_OPERAND_P; *use = NULL_USE_OPERAND_P; ptr->done = true; return; } /* Initialize iterator PTR to the operands in STMT. Return the first operands in USE and DEF. */ static inline void op_iter_init_maydef (ssa_op_iter *ptr, tree stmt, use_operand_p *use, def_operand_p *def) { gcc_assert (TREE_CODE (stmt) != PHI_NODE); op_iter_init (ptr, stmt, SSA_OP_VMAYUSE); ptr->iter_type = ssa_op_iter_maymustdef; op_iter_next_maymustdef (use, def, ptr); } /* Initialize iterator PTR to the operands in STMT. Return the first operands in KILL and DEF. */ static inline void op_iter_init_mustdef (ssa_op_iter *ptr, tree stmt, use_operand_p *kill, def_operand_p *def) { gcc_assert (TREE_CODE (stmt) != PHI_NODE); op_iter_init (ptr, stmt, SSA_OP_VMUSTKILL); ptr->iter_type = ssa_op_iter_maymustdef; op_iter_next_maymustdef (kill, def, ptr); } /* Initialize iterator PTR to the operands in STMT. Return the first operands in KILL and DEF. */ static inline void op_iter_init_must_and_may_def (ssa_op_iter *ptr, tree stmt, use_operand_p *kill, def_operand_p *def) { gcc_assert (TREE_CODE (stmt) != PHI_NODE); op_iter_init (ptr, stmt, SSA_OP_VMUSTKILL|SSA_OP_VMAYUSE); ptr->iter_type = ssa_op_iter_maymustdef; op_iter_next_maymustdef (kill, def, ptr); } /* If there is a single operand in STMT matching FLAGS, return it. Otherwise return NULL. */ static inline tree single_ssa_tree_operand (tree stmt, int flags) { tree var; ssa_op_iter iter; var = op_iter_init_tree (&iter, stmt, flags); if (op_iter_done (&iter)) return NULL_TREE; op_iter_next_tree (&iter); if (op_iter_done (&iter)) return var; return NULL_TREE; } /* If there is a single operand in STMT matching FLAGS, return it. Otherwise return NULL. */ static inline use_operand_p single_ssa_use_operand (tree stmt, int flags) { use_operand_p var; ssa_op_iter iter; var = op_iter_init_use (&iter, stmt, flags); if (op_iter_done (&iter)) return NULL_USE_OPERAND_P; op_iter_next_use (&iter); if (op_iter_done (&iter)) return var; return NULL_USE_OPERAND_P; } /* If there is a single operand in STMT matching FLAGS, return it. Otherwise return NULL. */ static inline def_operand_p single_ssa_def_operand (tree stmt, int flags) { def_operand_p var; ssa_op_iter iter; var = op_iter_init_def (&iter, stmt, flags); if (op_iter_done (&iter)) return NULL_DEF_OPERAND_P; op_iter_next_def (&iter); if (op_iter_done (&iter)) return var; return NULL_DEF_OPERAND_P; } /* If there is a single operand in STMT matching FLAGS, return it. Otherwise return NULL. */ static inline bool zero_ssa_operands (tree stmt, int flags) { ssa_op_iter iter; op_iter_init_tree (&iter, stmt, flags); return op_iter_done (&iter); } /* Return the number of operands matching FLAGS in STMT. */ static inline int num_ssa_operands (tree stmt, int flags) { ssa_op_iter iter; tree t; int num = 0; FOR_EACH_SSA_TREE_OPERAND (t, stmt, iter, flags) num++; return num; } /* Delink all immediate_use information for STMT. */ static inline void delink_stmt_imm_use (tree stmt) { ssa_op_iter iter; use_operand_p use_p; if (ssa_operands_active ()) FOR_EACH_SSA_USE_OPERAND (use_p, stmt, iter, (SSA_OP_ALL_USES | SSA_OP_ALL_KILLS)) delink_imm_use (use_p); } /* This routine will compare all the operands matching FLAGS in STMT1 to those in STMT2. TRUE is returned if they are the same. STMTs can be NULL. */ static inline bool compare_ssa_operands_equal (tree stmt1, tree stmt2, int flags) { ssa_op_iter iter1, iter2; tree op1 = NULL_TREE; tree op2 = NULL_TREE; bool look1, look2; if (stmt1 == stmt2) return true; look1 = stmt1 && stmt_ann (stmt1); look2 = stmt2 && stmt_ann (stmt2); if (look1) { op1 = op_iter_init_tree (&iter1, stmt1, flags); if (!look2) return op_iter_done (&iter1); } else clear_and_done_ssa_iter (&iter1); if (look2) { op2 = op_iter_init_tree (&iter2, stmt2, flags); if (!look1) return op_iter_done (&iter2); } else clear_and_done_ssa_iter (&iter2); while (!op_iter_done (&iter1) && !op_iter_done (&iter2)) { if (op1 != op2) return false; op1 = op_iter_next_tree (&iter1); op2 = op_iter_next_tree (&iter2); } return (op_iter_done (&iter1) && op_iter_done (&iter2)); } /* If there is a single DEF in the PHI node which matches FLAG, return it. Otherwise return NULL_DEF_OPERAND_P. */ static inline tree single_phi_def (tree stmt, int flags) { tree def = PHI_RESULT (stmt); if ((flags & SSA_OP_DEF) && is_gimple_reg (def)) return def; if ((flags & SSA_OP_VIRTUAL_DEFS) && !is_gimple_reg (def)) return def; return NULL_TREE; } /* Initialize the iterator PTR for uses matching FLAGS in PHI. FLAGS should be either SSA_OP_USES or SAS_OP_VIRTUAL_USES. */ static inline use_operand_p op_iter_init_phiuse (ssa_op_iter *ptr, tree phi, int flags) { tree phi_def = PHI_RESULT (phi); int comp; clear_and_done_ssa_iter (ptr); ptr->done = false; gcc_assert ((flags & (SSA_OP_USE | SSA_OP_VIRTUAL_USES)) != 0); comp = (is_gimple_reg (phi_def) ? SSA_OP_USE : SSA_OP_VIRTUAL_USES); /* If the PHI node doesn't the operand type we care about, we're done. */ if ((flags & comp) == 0) { ptr->done = true; return NULL_USE_OPERAND_P; } ptr->phi_stmt = phi; ptr->num_phi = PHI_NUM_ARGS (phi); ptr->iter_type = ssa_op_iter_use; return op_iter_next_use (ptr); } /* Start an iterator for a PHI definition. */ static inline def_operand_p op_iter_init_phidef (ssa_op_iter *ptr, tree phi, int flags) { tree phi_def = PHI_RESULT (phi); int comp; clear_and_done_ssa_iter (ptr); ptr->done = false; gcc_assert ((flags & (SSA_OP_DEF | SSA_OP_VIRTUAL_DEFS)) != 0); comp = (is_gimple_reg (phi_def) ? SSA_OP_DEF : SSA_OP_VIRTUAL_DEFS); /* If the PHI node doesn't the operand type we care about, we're done. */ if ((flags & comp) == 0) { ptr->done = true; return NULL_USE_OPERAND_P; } ptr->iter_type = ssa_op_iter_def; /* The first call to op_iter_next_def will terminate the iterator since all the fields are NULL. Simply return the result here as the first and therefore only result. */ return PHI_RESULT_PTR (phi); } /* Return true if VAR cannot be modified by the program. */ static inline bool unmodifiable_var_p (tree var) { if (TREE_CODE (var) == SSA_NAME) var = SSA_NAME_VAR (var); return TREE_READONLY (var) && (TREE_STATIC (var) || DECL_EXTERNAL (var)); } /* Return true if REF, an ARRAY_REF, has an INDIRECT_REF somewhere in it. */ static inline bool array_ref_contains_indirect_ref (tree ref) { gcc_assert (TREE_CODE (ref) == ARRAY_REF); do { ref = TREE_OPERAND (ref, 0); } while (handled_component_p (ref)); return TREE_CODE (ref) == INDIRECT_REF; } /* Return true if REF, a handled component reference, has an ARRAY_REF somewhere in it. */ static inline bool ref_contains_array_ref (tree ref) { gcc_assert (handled_component_p (ref)); do { if (TREE_CODE (ref) == ARRAY_REF) return true; ref = TREE_OPERAND (ref, 0); } while (handled_component_p (ref)); return false; } /* Given a variable VAR, lookup and return a pointer to the list of subvariables for it. */ static inline subvar_t * lookup_subvars_for_var (tree var) { var_ann_t ann = var_ann (var); gcc_assert (ann); return &ann->subvars; } /* Given a variable VAR, return a linked list of subvariables for VAR, or NULL, if there are no subvariables. */ static inline subvar_t get_subvars_for_var (tree var) { subvar_t subvars; gcc_assert (SSA_VAR_P (var)); if (TREE_CODE (var) == SSA_NAME) subvars = *(lookup_subvars_for_var (SSA_NAME_VAR (var))); else subvars = *(lookup_subvars_for_var (var)); return subvars; } /* Return the subvariable of VAR at offset OFFSET. */ static inline tree get_subvar_at (tree var, unsigned HOST_WIDE_INT offset) { subvar_t sv; for (sv = get_subvars_for_var (var); sv; sv = sv->next) if (sv->offset == offset) return sv->var; return NULL_TREE; } /* Return true if V is a tree that we can have subvars for. Normally, this is any aggregate type, however, due to implementation limitations ATM, we exclude array types as well. */ static inline bool var_can_have_subvars (tree v) { /* Volatile variables should never have subvars. */ if (TREE_THIS_VOLATILE (v)) return false; return (AGGREGATE_TYPE_P (TREE_TYPE (v)) && TREE_CODE (TREE_TYPE (v)) != ARRAY_TYPE); } /* Return true if OFFSET and SIZE define a range that overlaps with some portion of the range of SV, a subvar. If there was an exact overlap, *EXACT will be set to true upon return. */ static inline bool overlap_subvar (unsigned HOST_WIDE_INT offset, unsigned HOST_WIDE_INT size, subvar_t sv, bool *exact) { /* There are three possible cases of overlap. 1. We can have an exact overlap, like so: |offset, offset + size | |sv->offset, sv->offset + sv->size | 2. We can have offset starting after sv->offset, like so: |offset, offset + size | |sv->offset, sv->offset + sv->size | 3. We can have offset starting before sv->offset, like so: |offset, offset + size | |sv->offset, sv->offset + sv->size| */ if (exact) *exact = false; if (offset == sv->offset && size == sv->size) { if (exact) *exact = true; return true; } else if (offset >= sv->offset && offset < (sv->offset + sv->size)) { return true; } else if (offset < sv->offset && (size > sv->offset - offset)) { return true; } return false; } #endif /* _TREE_FLOW_INLINE_H */