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3184 lines
91 KiB
C
3184 lines
91 KiB
C
/* Callgraph handling code.
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Copyright (C) 2003-2014 Free Software Foundation, Inc.
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Contributed by Jan Hubicka
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* This file contains basic routines manipulating call graph
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The call-graph is a data structure designed for intra-procedural optimization.
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It represents a multi-graph where nodes are functions and edges are call sites. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "varasm.h"
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#include "calls.h"
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#include "print-tree.h"
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#include "tree-inline.h"
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#include "langhooks.h"
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#include "hashtab.h"
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#include "toplev.h"
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#include "flags.h"
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#include "debug.h"
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#include "target.h"
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#include "cgraph.h"
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#include "intl.h"
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#include "tree-ssa-alias.h"
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#include "internal-fn.h"
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#include "tree-eh.h"
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#include "gimple-expr.h"
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#include "gimple.h"
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#include "gimple-iterator.h"
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#include "timevar.h"
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#include "dumpfile.h"
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#include "gimple-ssa.h"
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#include "cgraph.h"
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#include "tree-cfg.h"
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#include "tree-ssa.h"
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#include "value-prof.h"
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#include "except.h"
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#include "diagnostic-core.h"
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#include "rtl.h"
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#include "ipa-utils.h"
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#include "lto-streamer.h"
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#include "ipa-inline.h"
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#include "cfgloop.h"
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#include "gimple-pretty-print.h"
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#include "expr.h"
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#include "tree-dfa.h"
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/* FIXME: Only for PROP_loops, but cgraph shouldn't have to know about this. */
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#include "tree-pass.h"
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static void cgraph_node_remove_callers (struct cgraph_node *node);
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static inline void cgraph_edge_remove_caller (struct cgraph_edge *e);
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static inline void cgraph_edge_remove_callee (struct cgraph_edge *e);
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/* Queue of cgraph nodes scheduled to be lowered. */
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symtab_node *x_cgraph_nodes_queue;
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#define cgraph_nodes_queue ((struct cgraph_node *)x_cgraph_nodes_queue)
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/* Number of nodes in existence. */
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int cgraph_n_nodes;
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/* Maximal uid used in cgraph nodes. */
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int cgraph_max_uid;
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/* Maximal uid used in cgraph edges. */
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int cgraph_edge_max_uid;
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/* Set when whole unit has been analyzed so we can access global info. */
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bool cgraph_global_info_ready = false;
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/* What state callgraph is in right now. */
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enum cgraph_state cgraph_state = CGRAPH_STATE_PARSING;
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/* Set when the cgraph is fully build and the basic flags are computed. */
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bool cgraph_function_flags_ready = false;
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/* List of hooks triggered on cgraph_edge events. */
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struct cgraph_edge_hook_list {
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cgraph_edge_hook hook;
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void *data;
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struct cgraph_edge_hook_list *next;
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};
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/* List of hooks triggered on cgraph_node events. */
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struct cgraph_node_hook_list {
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cgraph_node_hook hook;
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void *data;
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struct cgraph_node_hook_list *next;
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};
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/* List of hooks triggered on events involving two cgraph_edges. */
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struct cgraph_2edge_hook_list {
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cgraph_2edge_hook hook;
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void *data;
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struct cgraph_2edge_hook_list *next;
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};
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/* List of hooks triggered on events involving two cgraph_nodes. */
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struct cgraph_2node_hook_list {
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cgraph_2node_hook hook;
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void *data;
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struct cgraph_2node_hook_list *next;
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};
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/* List of hooks triggered when an edge is removed. */
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struct cgraph_edge_hook_list *first_cgraph_edge_removal_hook;
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/* List of hooks triggered when a node is removed. */
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struct cgraph_node_hook_list *first_cgraph_node_removal_hook;
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/* List of hooks triggered when an edge is duplicated. */
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struct cgraph_2edge_hook_list *first_cgraph_edge_duplicated_hook;
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/* List of hooks triggered when a node is duplicated. */
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struct cgraph_2node_hook_list *first_cgraph_node_duplicated_hook;
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/* List of hooks triggered when an function is inserted. */
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struct cgraph_node_hook_list *first_cgraph_function_insertion_hook;
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/* Head of a linked list of unused (freed) call graph nodes.
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Do not GTY((delete)) this list so UIDs gets reliably recycled. */
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static GTY(()) struct cgraph_node *free_nodes;
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/* Head of a linked list of unused (freed) call graph edges.
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Do not GTY((delete)) this list so UIDs gets reliably recycled. */
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static GTY(()) struct cgraph_edge *free_edges;
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/* Did procss_same_body_aliases run? */
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bool cpp_implicit_aliases_done;
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/* Map a cgraph_node to cgraph_function_version_info using this htab.
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The cgraph_function_version_info has a THIS_NODE field that is the
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corresponding cgraph_node.. */
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static GTY((param_is (struct cgraph_function_version_info))) htab_t
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cgraph_fnver_htab = NULL;
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/* Hash function for cgraph_fnver_htab. */
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static hashval_t
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cgraph_fnver_htab_hash (const void *ptr)
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{
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int uid = ((const struct cgraph_function_version_info *)ptr)->this_node->uid;
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return (hashval_t)(uid);
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}
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/* eq function for cgraph_fnver_htab. */
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static int
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cgraph_fnver_htab_eq (const void *p1, const void *p2)
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{
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const struct cgraph_function_version_info *n1
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= (const struct cgraph_function_version_info *)p1;
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const struct cgraph_function_version_info *n2
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= (const struct cgraph_function_version_info *)p2;
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return n1->this_node->uid == n2->this_node->uid;
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}
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/* Mark as GC root all allocated nodes. */
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static GTY(()) struct cgraph_function_version_info *
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version_info_node = NULL;
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/* Get the cgraph_function_version_info node corresponding to node. */
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struct cgraph_function_version_info *
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get_cgraph_node_version (struct cgraph_node *node)
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{
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struct cgraph_function_version_info *ret;
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struct cgraph_function_version_info key;
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key.this_node = node;
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if (cgraph_fnver_htab == NULL)
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return NULL;
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ret = (struct cgraph_function_version_info *)
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htab_find (cgraph_fnver_htab, &key);
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return ret;
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}
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/* Insert a new cgraph_function_version_info node into cgraph_fnver_htab
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corresponding to cgraph_node NODE. */
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struct cgraph_function_version_info *
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insert_new_cgraph_node_version (struct cgraph_node *node)
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{
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void **slot;
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version_info_node = NULL;
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version_info_node = ggc_alloc_cleared_cgraph_function_version_info ();
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version_info_node->this_node = node;
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if (cgraph_fnver_htab == NULL)
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cgraph_fnver_htab = htab_create_ggc (2, cgraph_fnver_htab_hash,
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cgraph_fnver_htab_eq, NULL);
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slot = htab_find_slot (cgraph_fnver_htab, version_info_node, INSERT);
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gcc_assert (slot != NULL);
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*slot = version_info_node;
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return version_info_node;
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}
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/* Remove the cgraph_function_version_info and cgraph_node for DECL. This
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DECL is a duplicate declaration. */
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void
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delete_function_version (tree decl)
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{
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struct cgraph_node *decl_node = cgraph_get_node (decl);
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struct cgraph_function_version_info *decl_v = NULL;
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if (decl_node == NULL)
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return;
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decl_v = get_cgraph_node_version (decl_node);
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if (decl_v == NULL)
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return;
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if (decl_v->prev != NULL)
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decl_v->prev->next = decl_v->next;
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if (decl_v->next != NULL)
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decl_v->next->prev = decl_v->prev;
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if (cgraph_fnver_htab != NULL)
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htab_remove_elt (cgraph_fnver_htab, decl_v);
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cgraph_remove_node (decl_node);
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}
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/* Record that DECL1 and DECL2 are semantically identical function
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versions. */
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void
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record_function_versions (tree decl1, tree decl2)
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{
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struct cgraph_node *decl1_node = cgraph_get_create_node (decl1);
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struct cgraph_node *decl2_node = cgraph_get_create_node (decl2);
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struct cgraph_function_version_info *decl1_v = NULL;
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struct cgraph_function_version_info *decl2_v = NULL;
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struct cgraph_function_version_info *before;
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struct cgraph_function_version_info *after;
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gcc_assert (decl1_node != NULL && decl2_node != NULL);
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decl1_v = get_cgraph_node_version (decl1_node);
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decl2_v = get_cgraph_node_version (decl2_node);
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if (decl1_v != NULL && decl2_v != NULL)
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return;
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if (decl1_v == NULL)
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decl1_v = insert_new_cgraph_node_version (decl1_node);
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if (decl2_v == NULL)
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decl2_v = insert_new_cgraph_node_version (decl2_node);
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/* Chain decl2_v and decl1_v. All semantically identical versions
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will be chained together. */
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before = decl1_v;
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after = decl2_v;
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while (before->next != NULL)
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before = before->next;
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while (after->prev != NULL)
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after= after->prev;
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before->next = after;
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after->prev = before;
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}
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/* Macros to access the next item in the list of free cgraph nodes and
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edges. */
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#define NEXT_FREE_NODE(NODE) cgraph ((NODE)->next)
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#define SET_NEXT_FREE_NODE(NODE,NODE2) ((NODE))->next = NODE2
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#define NEXT_FREE_EDGE(EDGE) (EDGE)->prev_caller
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/* Register HOOK to be called with DATA on each removed edge. */
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struct cgraph_edge_hook_list *
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cgraph_add_edge_removal_hook (cgraph_edge_hook hook, void *data)
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{
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struct cgraph_edge_hook_list *entry;
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struct cgraph_edge_hook_list **ptr = &first_cgraph_edge_removal_hook;
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entry = (struct cgraph_edge_hook_list *) xmalloc (sizeof (*entry));
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entry->hook = hook;
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entry->data = data;
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entry->next = NULL;
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while (*ptr)
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ptr = &(*ptr)->next;
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*ptr = entry;
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return entry;
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}
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/* Remove ENTRY from the list of hooks called on removing edges. */
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void
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cgraph_remove_edge_removal_hook (struct cgraph_edge_hook_list *entry)
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{
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struct cgraph_edge_hook_list **ptr = &first_cgraph_edge_removal_hook;
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while (*ptr != entry)
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ptr = &(*ptr)->next;
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*ptr = entry->next;
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free (entry);
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}
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/* Call all edge removal hooks. */
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static void
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cgraph_call_edge_removal_hooks (struct cgraph_edge *e)
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{
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struct cgraph_edge_hook_list *entry = first_cgraph_edge_removal_hook;
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while (entry)
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{
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entry->hook (e, entry->data);
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entry = entry->next;
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}
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}
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/* Register HOOK to be called with DATA on each removed node. */
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struct cgraph_node_hook_list *
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cgraph_add_node_removal_hook (cgraph_node_hook hook, void *data)
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{
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struct cgraph_node_hook_list *entry;
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struct cgraph_node_hook_list **ptr = &first_cgraph_node_removal_hook;
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entry = (struct cgraph_node_hook_list *) xmalloc (sizeof (*entry));
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entry->hook = hook;
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entry->data = data;
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entry->next = NULL;
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while (*ptr)
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ptr = &(*ptr)->next;
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*ptr = entry;
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return entry;
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}
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/* Remove ENTRY from the list of hooks called on removing nodes. */
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void
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cgraph_remove_node_removal_hook (struct cgraph_node_hook_list *entry)
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{
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struct cgraph_node_hook_list **ptr = &first_cgraph_node_removal_hook;
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while (*ptr != entry)
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ptr = &(*ptr)->next;
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*ptr = entry->next;
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free (entry);
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}
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/* Call all node removal hooks. */
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static void
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cgraph_call_node_removal_hooks (struct cgraph_node *node)
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{
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struct cgraph_node_hook_list *entry = first_cgraph_node_removal_hook;
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while (entry)
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{
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entry->hook (node, entry->data);
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entry = entry->next;
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}
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}
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/* Register HOOK to be called with DATA on each inserted node. */
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struct cgraph_node_hook_list *
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cgraph_add_function_insertion_hook (cgraph_node_hook hook, void *data)
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{
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struct cgraph_node_hook_list *entry;
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struct cgraph_node_hook_list **ptr = &first_cgraph_function_insertion_hook;
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entry = (struct cgraph_node_hook_list *) xmalloc (sizeof (*entry));
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entry->hook = hook;
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entry->data = data;
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entry->next = NULL;
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while (*ptr)
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ptr = &(*ptr)->next;
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*ptr = entry;
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return entry;
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}
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/* Remove ENTRY from the list of hooks called on inserted nodes. */
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void
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cgraph_remove_function_insertion_hook (struct cgraph_node_hook_list *entry)
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{
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struct cgraph_node_hook_list **ptr = &first_cgraph_function_insertion_hook;
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while (*ptr != entry)
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ptr = &(*ptr)->next;
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*ptr = entry->next;
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free (entry);
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}
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/* Call all node insertion hooks. */
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void
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cgraph_call_function_insertion_hooks (struct cgraph_node *node)
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{
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struct cgraph_node_hook_list *entry = first_cgraph_function_insertion_hook;
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while (entry)
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{
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entry->hook (node, entry->data);
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entry = entry->next;
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}
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}
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/* Register HOOK to be called with DATA on each duplicated edge. */
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struct cgraph_2edge_hook_list *
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cgraph_add_edge_duplication_hook (cgraph_2edge_hook hook, void *data)
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{
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struct cgraph_2edge_hook_list *entry;
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struct cgraph_2edge_hook_list **ptr = &first_cgraph_edge_duplicated_hook;
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entry = (struct cgraph_2edge_hook_list *) xmalloc (sizeof (*entry));
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entry->hook = hook;
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entry->data = data;
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entry->next = NULL;
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while (*ptr)
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ptr = &(*ptr)->next;
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*ptr = entry;
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return entry;
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}
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/* Remove ENTRY from the list of hooks called on duplicating edges. */
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void
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cgraph_remove_edge_duplication_hook (struct cgraph_2edge_hook_list *entry)
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{
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struct cgraph_2edge_hook_list **ptr = &first_cgraph_edge_duplicated_hook;
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while (*ptr != entry)
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ptr = &(*ptr)->next;
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*ptr = entry->next;
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free (entry);
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}
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/* Call all edge duplication hooks. */
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void
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cgraph_call_edge_duplication_hooks (struct cgraph_edge *cs1,
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struct cgraph_edge *cs2)
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{
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struct cgraph_2edge_hook_list *entry = first_cgraph_edge_duplicated_hook;
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while (entry)
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{
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entry->hook (cs1, cs2, entry->data);
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entry = entry->next;
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}
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}
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/* Register HOOK to be called with DATA on each duplicated node. */
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struct cgraph_2node_hook_list *
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cgraph_add_node_duplication_hook (cgraph_2node_hook hook, void *data)
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{
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struct cgraph_2node_hook_list *entry;
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struct cgraph_2node_hook_list **ptr = &first_cgraph_node_duplicated_hook;
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entry = (struct cgraph_2node_hook_list *) xmalloc (sizeof (*entry));
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entry->hook = hook;
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entry->data = data;
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entry->next = NULL;
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while (*ptr)
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ptr = &(*ptr)->next;
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*ptr = entry;
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return entry;
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}
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/* Remove ENTRY from the list of hooks called on duplicating nodes. */
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void
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cgraph_remove_node_duplication_hook (struct cgraph_2node_hook_list *entry)
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{
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struct cgraph_2node_hook_list **ptr = &first_cgraph_node_duplicated_hook;
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while (*ptr != entry)
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ptr = &(*ptr)->next;
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*ptr = entry->next;
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free (entry);
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}
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/* Call all node duplication hooks. */
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void
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cgraph_call_node_duplication_hooks (struct cgraph_node *node1,
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struct cgraph_node *node2)
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{
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struct cgraph_2node_hook_list *entry = first_cgraph_node_duplicated_hook;
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while (entry)
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{
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entry->hook (node1, node2, entry->data);
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entry = entry->next;
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}
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}
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/* Allocate new callgraph node. */
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static inline struct cgraph_node *
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cgraph_allocate_node (void)
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{
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struct cgraph_node *node;
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|
|
|
if (free_nodes)
|
|
{
|
|
node = free_nodes;
|
|
free_nodes = NEXT_FREE_NODE (node);
|
|
}
|
|
else
|
|
{
|
|
node = ggc_alloc_cleared_cgraph_node ();
|
|
node->uid = cgraph_max_uid++;
|
|
}
|
|
|
|
return node;
|
|
}
|
|
|
|
/* Allocate new callgraph node and insert it into basic data structures. */
|
|
|
|
struct cgraph_node *
|
|
cgraph_create_empty_node (void)
|
|
{
|
|
struct cgraph_node *node = cgraph_allocate_node ();
|
|
|
|
node->type = SYMTAB_FUNCTION;
|
|
node->frequency = NODE_FREQUENCY_NORMAL;
|
|
node->count_materialization_scale = REG_BR_PROB_BASE;
|
|
cgraph_n_nodes++;
|
|
return node;
|
|
}
|
|
|
|
/* Return cgraph node assigned to DECL. Create new one when needed. */
|
|
|
|
struct cgraph_node *
|
|
cgraph_create_node (tree decl)
|
|
{
|
|
struct cgraph_node *node = cgraph_create_empty_node ();
|
|
gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
|
|
|
|
node->decl = decl;
|
|
symtab_register_node (node);
|
|
|
|
if (DECL_CONTEXT (decl) && TREE_CODE (DECL_CONTEXT (decl)) == FUNCTION_DECL)
|
|
{
|
|
node->origin = cgraph_get_create_node (DECL_CONTEXT (decl));
|
|
node->next_nested = node->origin->nested;
|
|
node->origin->nested = node;
|
|
}
|
|
return node;
|
|
}
|
|
|
|
/* Try to find a call graph node for declaration DECL and if it does not exist
|
|
or if it corresponds to an inline clone, create a new one. */
|
|
|
|
struct cgraph_node *
|
|
cgraph_get_create_node (tree decl)
|
|
{
|
|
struct cgraph_node *first_clone = cgraph_get_node (decl);
|
|
|
|
if (first_clone && !first_clone->global.inlined_to)
|
|
return first_clone;
|
|
|
|
struct cgraph_node *node = cgraph_create_node (decl);
|
|
if (first_clone)
|
|
{
|
|
first_clone->clone_of = node;
|
|
node->clones = first_clone;
|
|
symtab_prevail_in_asm_name_hash (node);
|
|
symtab_insert_node_to_hashtable (node);
|
|
if (dump_file)
|
|
fprintf (dump_file, "Introduced new external node "
|
|
"(%s/%i) and turned into root of the clone tree.\n",
|
|
xstrdup (node->name ()), node->order);
|
|
}
|
|
else if (dump_file)
|
|
fprintf (dump_file, "Introduced new external node "
|
|
"(%s/%i).\n", xstrdup (node->name ()),
|
|
node->order);
|
|
return node;
|
|
}
|
|
|
|
/* Mark ALIAS as an alias to DECL. DECL_NODE is cgraph node representing
|
|
the function body is associated with (not necessarily cgraph_node (DECL). */
|
|
|
|
struct cgraph_node *
|
|
cgraph_create_function_alias (tree alias, tree target)
|
|
{
|
|
struct cgraph_node *alias_node;
|
|
|
|
gcc_assert (TREE_CODE (target) == FUNCTION_DECL
|
|
|| TREE_CODE (target) == IDENTIFIER_NODE);
|
|
gcc_assert (TREE_CODE (alias) == FUNCTION_DECL);
|
|
alias_node = cgraph_get_create_node (alias);
|
|
gcc_assert (!alias_node->definition);
|
|
alias_node->alias_target = target;
|
|
alias_node->definition = true;
|
|
alias_node->alias = true;
|
|
if (lookup_attribute ("weakref", DECL_ATTRIBUTES (alias)) != NULL)
|
|
alias_node->weakref = true;
|
|
return alias_node;
|
|
}
|
|
|
|
/* Attempt to mark ALIAS as an alias to DECL. Return alias node if successful
|
|
and NULL otherwise.
|
|
Same body aliases are output whenever the body of DECL is output,
|
|
and cgraph_get_node (ALIAS) transparently returns cgraph_get_node (DECL). */
|
|
|
|
struct cgraph_node *
|
|
cgraph_same_body_alias (struct cgraph_node *decl_node ATTRIBUTE_UNUSED, tree alias, tree decl)
|
|
{
|
|
struct cgraph_node *n;
|
|
#ifndef ASM_OUTPUT_DEF
|
|
/* If aliases aren't supported by the assembler, fail. */
|
|
return NULL;
|
|
#endif
|
|
/* Langhooks can create same body aliases of symbols not defined.
|
|
Those are useless. Drop them on the floor. */
|
|
if (cgraph_global_info_ready)
|
|
return NULL;
|
|
|
|
n = cgraph_create_function_alias (alias, decl);
|
|
n->cpp_implicit_alias = true;
|
|
if (cpp_implicit_aliases_done)
|
|
symtab_resolve_alias (n,
|
|
cgraph_get_node (decl));
|
|
return n;
|
|
}
|
|
|
|
/* Add thunk alias into callgraph. The alias declaration is ALIAS and it
|
|
aliases DECL with an adjustments made into the first parameter.
|
|
See comments in thunk_adjust for detail on the parameters. */
|
|
|
|
struct cgraph_node *
|
|
cgraph_add_thunk (struct cgraph_node *decl_node ATTRIBUTE_UNUSED,
|
|
tree alias, tree decl ATTRIBUTE_UNUSED,
|
|
bool this_adjusting,
|
|
HOST_WIDE_INT fixed_offset, HOST_WIDE_INT virtual_value,
|
|
tree virtual_offset,
|
|
tree real_alias)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
node = cgraph_get_node (alias);
|
|
if (node)
|
|
{
|
|
gcc_assert (node->definition);
|
|
gcc_assert (!node->alias);
|
|
gcc_assert (!node->thunk.thunk_p);
|
|
cgraph_remove_node (node);
|
|
}
|
|
|
|
node = cgraph_create_node (alias);
|
|
gcc_checking_assert (!virtual_offset
|
|
|| tree_to_double_int (virtual_offset) ==
|
|
double_int::from_shwi (virtual_value));
|
|
node->thunk.fixed_offset = fixed_offset;
|
|
node->thunk.this_adjusting = this_adjusting;
|
|
node->thunk.virtual_value = virtual_value;
|
|
node->thunk.virtual_offset_p = virtual_offset != NULL;
|
|
node->thunk.alias = real_alias;
|
|
node->thunk.thunk_p = true;
|
|
node->definition = true;
|
|
|
|
return node;
|
|
}
|
|
|
|
/* Return the cgraph node that has ASMNAME for its DECL_ASSEMBLER_NAME.
|
|
Return NULL if there's no such node. */
|
|
|
|
struct cgraph_node *
|
|
cgraph_node_for_asm (tree asmname)
|
|
{
|
|
/* We do not want to look at inline clones. */
|
|
for (symtab_node *node = symtab_node_for_asm (asmname);
|
|
node;
|
|
node = node->next_sharing_asm_name)
|
|
{
|
|
cgraph_node *cn = dyn_cast <cgraph_node> (node);
|
|
if (cn && !cn->global.inlined_to)
|
|
return cn;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Returns a hash value for X (which really is a cgraph_edge). */
|
|
|
|
static hashval_t
|
|
edge_hash (const void *x)
|
|
{
|
|
return htab_hash_pointer (((const struct cgraph_edge *) x)->call_stmt);
|
|
}
|
|
|
|
/* Return nonzero if the call_stmt of of cgraph_edge X is stmt *Y. */
|
|
|
|
static int
|
|
edge_eq (const void *x, const void *y)
|
|
{
|
|
return ((const struct cgraph_edge *) x)->call_stmt == y;
|
|
}
|
|
|
|
/* Add call graph edge E to call site hash of its caller. */
|
|
|
|
static inline void
|
|
cgraph_update_edge_in_call_site_hash (struct cgraph_edge *e)
|
|
{
|
|
void **slot;
|
|
slot = htab_find_slot_with_hash (e->caller->call_site_hash,
|
|
e->call_stmt,
|
|
htab_hash_pointer (e->call_stmt),
|
|
INSERT);
|
|
*slot = e;
|
|
}
|
|
|
|
/* Add call graph edge E to call site hash of its caller. */
|
|
|
|
static inline void
|
|
cgraph_add_edge_to_call_site_hash (struct cgraph_edge *e)
|
|
{
|
|
void **slot;
|
|
/* There are two speculative edges for every statement (one direct,
|
|
one indirect); always hash the direct one. */
|
|
if (e->speculative && e->indirect_unknown_callee)
|
|
return;
|
|
slot = htab_find_slot_with_hash (e->caller->call_site_hash,
|
|
e->call_stmt,
|
|
htab_hash_pointer (e->call_stmt),
|
|
INSERT);
|
|
if (*slot)
|
|
{
|
|
gcc_assert (((struct cgraph_edge *)*slot)->speculative);
|
|
if (e->callee)
|
|
*slot = e;
|
|
return;
|
|
}
|
|
gcc_assert (!*slot || e->speculative);
|
|
*slot = e;
|
|
}
|
|
|
|
/* Return the callgraph edge representing the GIMPLE_CALL statement
|
|
CALL_STMT. */
|
|
|
|
struct cgraph_edge *
|
|
cgraph_edge (struct cgraph_node *node, gimple call_stmt)
|
|
{
|
|
struct cgraph_edge *e, *e2;
|
|
int n = 0;
|
|
|
|
if (node->call_site_hash)
|
|
return (struct cgraph_edge *)
|
|
htab_find_with_hash (node->call_site_hash, call_stmt,
|
|
htab_hash_pointer (call_stmt));
|
|
|
|
/* This loop may turn out to be performance problem. In such case adding
|
|
hashtables into call nodes with very many edges is probably best
|
|
solution. It is not good idea to add pointer into CALL_EXPR itself
|
|
because we want to make possible having multiple cgraph nodes representing
|
|
different clones of the same body before the body is actually cloned. */
|
|
for (e = node->callees; e; e = e->next_callee)
|
|
{
|
|
if (e->call_stmt == call_stmt)
|
|
break;
|
|
n++;
|
|
}
|
|
|
|
if (!e)
|
|
for (e = node->indirect_calls; e; e = e->next_callee)
|
|
{
|
|
if (e->call_stmt == call_stmt)
|
|
break;
|
|
n++;
|
|
}
|
|
|
|
if (n > 100)
|
|
{
|
|
node->call_site_hash = htab_create_ggc (120, edge_hash, edge_eq, NULL);
|
|
for (e2 = node->callees; e2; e2 = e2->next_callee)
|
|
cgraph_add_edge_to_call_site_hash (e2);
|
|
for (e2 = node->indirect_calls; e2; e2 = e2->next_callee)
|
|
cgraph_add_edge_to_call_site_hash (e2);
|
|
}
|
|
|
|
return e;
|
|
}
|
|
|
|
|
|
/* Change field call_stmt of edge E to NEW_STMT.
|
|
If UPDATE_SPECULATIVE and E is any component of speculative
|
|
edge, then update all components. */
|
|
|
|
void
|
|
cgraph_set_call_stmt (struct cgraph_edge *e, gimple new_stmt,
|
|
bool update_speculative)
|
|
{
|
|
tree decl;
|
|
|
|
/* Speculative edges has three component, update all of them
|
|
when asked to. */
|
|
if (update_speculative && e->speculative)
|
|
{
|
|
struct cgraph_edge *direct, *indirect;
|
|
struct ipa_ref *ref;
|
|
|
|
cgraph_speculative_call_info (e, direct, indirect, ref);
|
|
cgraph_set_call_stmt (direct, new_stmt, false);
|
|
cgraph_set_call_stmt (indirect, new_stmt, false);
|
|
ref->stmt = new_stmt;
|
|
return;
|
|
}
|
|
|
|
/* Only direct speculative edges go to call_site_hash. */
|
|
if (e->caller->call_site_hash
|
|
&& (!e->speculative || !e->indirect_unknown_callee))
|
|
{
|
|
htab_remove_elt_with_hash (e->caller->call_site_hash,
|
|
e->call_stmt,
|
|
htab_hash_pointer (e->call_stmt));
|
|
}
|
|
|
|
e->call_stmt = new_stmt;
|
|
if (e->indirect_unknown_callee
|
|
&& (decl = gimple_call_fndecl (new_stmt)))
|
|
{
|
|
/* Constant propagation (and possibly also inlining?) can turn an
|
|
indirect call into a direct one. */
|
|
struct cgraph_node *new_callee = cgraph_get_node (decl);
|
|
|
|
gcc_checking_assert (new_callee);
|
|
e = cgraph_make_edge_direct (e, new_callee);
|
|
}
|
|
|
|
push_cfun (DECL_STRUCT_FUNCTION (e->caller->decl));
|
|
e->can_throw_external = stmt_can_throw_external (new_stmt);
|
|
pop_cfun ();
|
|
if (e->caller->call_site_hash)
|
|
cgraph_add_edge_to_call_site_hash (e);
|
|
}
|
|
|
|
/* Allocate a cgraph_edge structure and fill it with data according to the
|
|
parameters of which only CALLEE can be NULL (when creating an indirect call
|
|
edge). */
|
|
|
|
static struct cgraph_edge *
|
|
cgraph_create_edge_1 (struct cgraph_node *caller, struct cgraph_node *callee,
|
|
gimple call_stmt, gcov_type count, int freq,
|
|
bool indir_unknown_callee)
|
|
{
|
|
struct cgraph_edge *edge;
|
|
|
|
/* LTO does not actually have access to the call_stmt since these
|
|
have not been loaded yet. */
|
|
if (call_stmt)
|
|
{
|
|
/* This is a rather expensive check possibly triggering
|
|
construction of call stmt hashtable. */
|
|
#ifdef ENABLE_CHECKING
|
|
struct cgraph_edge *e;
|
|
gcc_checking_assert (!(e=cgraph_edge (caller, call_stmt)) || e->speculative);
|
|
#endif
|
|
|
|
gcc_assert (is_gimple_call (call_stmt));
|
|
}
|
|
|
|
if (free_edges)
|
|
{
|
|
edge = free_edges;
|
|
free_edges = NEXT_FREE_EDGE (edge);
|
|
}
|
|
else
|
|
{
|
|
edge = ggc_alloc_cgraph_edge ();
|
|
edge->uid = cgraph_edge_max_uid++;
|
|
}
|
|
|
|
edge->aux = NULL;
|
|
edge->caller = caller;
|
|
edge->callee = callee;
|
|
edge->prev_caller = NULL;
|
|
edge->next_caller = NULL;
|
|
edge->prev_callee = NULL;
|
|
edge->next_callee = NULL;
|
|
edge->lto_stmt_uid = 0;
|
|
|
|
edge->count = count;
|
|
gcc_assert (count >= 0);
|
|
edge->frequency = freq;
|
|
gcc_assert (freq >= 0);
|
|
gcc_assert (freq <= CGRAPH_FREQ_MAX);
|
|
|
|
edge->call_stmt = call_stmt;
|
|
push_cfun (DECL_STRUCT_FUNCTION (caller->decl));
|
|
edge->can_throw_external
|
|
= call_stmt ? stmt_can_throw_external (call_stmt) : false;
|
|
pop_cfun ();
|
|
if (call_stmt
|
|
&& callee && callee->decl
|
|
&& !gimple_check_call_matching_types (call_stmt, callee->decl,
|
|
false))
|
|
edge->call_stmt_cannot_inline_p = true;
|
|
else
|
|
edge->call_stmt_cannot_inline_p = false;
|
|
|
|
edge->indirect_info = NULL;
|
|
edge->indirect_inlining_edge = 0;
|
|
edge->speculative = false;
|
|
edge->indirect_unknown_callee = indir_unknown_callee;
|
|
if (call_stmt && caller->call_site_hash)
|
|
cgraph_add_edge_to_call_site_hash (edge);
|
|
|
|
return edge;
|
|
}
|
|
|
|
/* Create edge from CALLER to CALLEE in the cgraph. */
|
|
|
|
struct cgraph_edge *
|
|
cgraph_create_edge (struct cgraph_node *caller, struct cgraph_node *callee,
|
|
gimple call_stmt, gcov_type count, int freq)
|
|
{
|
|
struct cgraph_edge *edge = cgraph_create_edge_1 (caller, callee, call_stmt,
|
|
count, freq, false);
|
|
|
|
initialize_inline_failed (edge);
|
|
|
|
edge->next_caller = callee->callers;
|
|
if (callee->callers)
|
|
callee->callers->prev_caller = edge;
|
|
edge->next_callee = caller->callees;
|
|
if (caller->callees)
|
|
caller->callees->prev_callee = edge;
|
|
caller->callees = edge;
|
|
callee->callers = edge;
|
|
|
|
return edge;
|
|
}
|
|
|
|
/* Allocate cgraph_indirect_call_info and set its fields to default values. */
|
|
|
|
struct cgraph_indirect_call_info *
|
|
cgraph_allocate_init_indirect_info (void)
|
|
{
|
|
struct cgraph_indirect_call_info *ii;
|
|
|
|
ii = ggc_alloc_cleared_cgraph_indirect_call_info ();
|
|
ii->param_index = -1;
|
|
return ii;
|
|
}
|
|
|
|
/* Create an indirect edge with a yet-undetermined callee where the call
|
|
statement destination is a formal parameter of the caller with index
|
|
PARAM_INDEX. */
|
|
|
|
struct cgraph_edge *
|
|
cgraph_create_indirect_edge (struct cgraph_node *caller, gimple call_stmt,
|
|
int ecf_flags,
|
|
gcov_type count, int freq)
|
|
{
|
|
struct cgraph_edge *edge = cgraph_create_edge_1 (caller, NULL, call_stmt,
|
|
count, freq, true);
|
|
tree target;
|
|
|
|
initialize_inline_failed (edge);
|
|
|
|
edge->indirect_info = cgraph_allocate_init_indirect_info ();
|
|
edge->indirect_info->ecf_flags = ecf_flags;
|
|
|
|
/* Record polymorphic call info. */
|
|
if (call_stmt
|
|
&& (target = gimple_call_fn (call_stmt))
|
|
&& virtual_method_call_p (target))
|
|
{
|
|
tree otr_type;
|
|
HOST_WIDE_INT otr_token;
|
|
ipa_polymorphic_call_context context;
|
|
|
|
get_polymorphic_call_info (caller->decl,
|
|
target,
|
|
&otr_type, &otr_token,
|
|
&context);
|
|
|
|
/* Only record types can have virtual calls. */
|
|
gcc_assert (TREE_CODE (otr_type) == RECORD_TYPE);
|
|
edge->indirect_info->polymorphic = true;
|
|
edge->indirect_info->param_index = -1;
|
|
edge->indirect_info->otr_token = otr_token;
|
|
edge->indirect_info->otr_type = otr_type;
|
|
edge->indirect_info->outer_type = context.outer_type;
|
|
edge->indirect_info->offset = context.offset;
|
|
edge->indirect_info->maybe_in_construction
|
|
= context.maybe_in_construction;
|
|
edge->indirect_info->maybe_derived_type = context.maybe_derived_type;
|
|
}
|
|
|
|
edge->next_callee = caller->indirect_calls;
|
|
if (caller->indirect_calls)
|
|
caller->indirect_calls->prev_callee = edge;
|
|
caller->indirect_calls = edge;
|
|
|
|
return edge;
|
|
}
|
|
|
|
/* Remove the edge E from the list of the callers of the callee. */
|
|
|
|
static inline void
|
|
cgraph_edge_remove_callee (struct cgraph_edge *e)
|
|
{
|
|
gcc_assert (!e->indirect_unknown_callee);
|
|
if (e->prev_caller)
|
|
e->prev_caller->next_caller = e->next_caller;
|
|
if (e->next_caller)
|
|
e->next_caller->prev_caller = e->prev_caller;
|
|
if (!e->prev_caller)
|
|
e->callee->callers = e->next_caller;
|
|
}
|
|
|
|
/* Remove the edge E from the list of the callees of the caller. */
|
|
|
|
static inline void
|
|
cgraph_edge_remove_caller (struct cgraph_edge *e)
|
|
{
|
|
if (e->prev_callee)
|
|
e->prev_callee->next_callee = e->next_callee;
|
|
if (e->next_callee)
|
|
e->next_callee->prev_callee = e->prev_callee;
|
|
if (!e->prev_callee)
|
|
{
|
|
if (e->indirect_unknown_callee)
|
|
e->caller->indirect_calls = e->next_callee;
|
|
else
|
|
e->caller->callees = e->next_callee;
|
|
}
|
|
if (e->caller->call_site_hash)
|
|
htab_remove_elt_with_hash (e->caller->call_site_hash,
|
|
e->call_stmt,
|
|
htab_hash_pointer (e->call_stmt));
|
|
}
|
|
|
|
/* Put the edge onto the free list. */
|
|
|
|
static void
|
|
cgraph_free_edge (struct cgraph_edge *e)
|
|
{
|
|
int uid = e->uid;
|
|
|
|
if (e->indirect_info)
|
|
ggc_free (e->indirect_info);
|
|
|
|
/* Clear out the edge so we do not dangle pointers. */
|
|
memset (e, 0, sizeof (*e));
|
|
e->uid = uid;
|
|
NEXT_FREE_EDGE (e) = free_edges;
|
|
free_edges = e;
|
|
}
|
|
|
|
/* Remove the edge E in the cgraph. */
|
|
|
|
void
|
|
cgraph_remove_edge (struct cgraph_edge *e)
|
|
{
|
|
/* Call all edge removal hooks. */
|
|
cgraph_call_edge_removal_hooks (e);
|
|
|
|
if (!e->indirect_unknown_callee)
|
|
/* Remove from callers list of the callee. */
|
|
cgraph_edge_remove_callee (e);
|
|
|
|
/* Remove from callees list of the callers. */
|
|
cgraph_edge_remove_caller (e);
|
|
|
|
/* Put the edge onto the free list. */
|
|
cgraph_free_edge (e);
|
|
}
|
|
|
|
/* Set callee of call graph edge E and add it to the corresponding set of
|
|
callers. */
|
|
|
|
static void
|
|
cgraph_set_edge_callee (struct cgraph_edge *e, struct cgraph_node *n)
|
|
{
|
|
e->prev_caller = NULL;
|
|
if (n->callers)
|
|
n->callers->prev_caller = e;
|
|
e->next_caller = n->callers;
|
|
n->callers = e;
|
|
e->callee = n;
|
|
}
|
|
|
|
/* Turn edge E into speculative call calling N2. Update
|
|
the profile so the direct call is taken COUNT times
|
|
with FREQUENCY.
|
|
|
|
At clone materialization time, the indirect call E will
|
|
be expanded as:
|
|
|
|
if (call_dest == N2)
|
|
n2 ();
|
|
else
|
|
call call_dest
|
|
|
|
At this time the function just creates the direct call,
|
|
the referencd representing the if conditional and attaches
|
|
them all to the orginal indirect call statement.
|
|
|
|
Return direct edge created. */
|
|
|
|
struct cgraph_edge *
|
|
cgraph_turn_edge_to_speculative (struct cgraph_edge *e,
|
|
struct cgraph_node *n2,
|
|
gcov_type direct_count,
|
|
int direct_frequency)
|
|
{
|
|
struct cgraph_node *n = e->caller;
|
|
struct ipa_ref *ref;
|
|
struct cgraph_edge *e2;
|
|
|
|
if (dump_file)
|
|
{
|
|
fprintf (dump_file, "Indirect call -> speculative call"
|
|
" %s/%i => %s/%i\n",
|
|
xstrdup (n->name ()), n->order,
|
|
xstrdup (n2->name ()), n2->order);
|
|
}
|
|
e->speculative = true;
|
|
e2 = cgraph_create_edge (n, n2, e->call_stmt, direct_count, direct_frequency);
|
|
initialize_inline_failed (e2);
|
|
e2->speculative = true;
|
|
if (TREE_NOTHROW (n2->decl))
|
|
e2->can_throw_external = false;
|
|
else
|
|
e2->can_throw_external = e->can_throw_external;
|
|
e2->lto_stmt_uid = e->lto_stmt_uid;
|
|
e->count -= e2->count;
|
|
e->frequency -= e2->frequency;
|
|
cgraph_call_edge_duplication_hooks (e, e2);
|
|
ref = ipa_record_reference (n, n2,
|
|
IPA_REF_ADDR, e->call_stmt);
|
|
ref->lto_stmt_uid = e->lto_stmt_uid;
|
|
ref->speculative = e->speculative;
|
|
cgraph_mark_address_taken_node (n2);
|
|
return e2;
|
|
}
|
|
|
|
/* Speculative call consist of three components:
|
|
1) an indirect edge representing the original call
|
|
2) an direct edge representing the new call
|
|
3) ADDR_EXPR reference representing the speculative check.
|
|
All three components are attached to single statement (the indirect
|
|
call) and if one of them exists, all of them must exist.
|
|
|
|
Given speculative call edge E, return all three components.
|
|
*/
|
|
|
|
void
|
|
cgraph_speculative_call_info (struct cgraph_edge *e,
|
|
struct cgraph_edge *&direct,
|
|
struct cgraph_edge *&indirect,
|
|
struct ipa_ref *&reference)
|
|
{
|
|
struct ipa_ref *ref;
|
|
int i;
|
|
struct cgraph_edge *e2;
|
|
|
|
if (!e->indirect_unknown_callee)
|
|
for (e2 = e->caller->indirect_calls;
|
|
e2->call_stmt != e->call_stmt || e2->lto_stmt_uid != e->lto_stmt_uid;
|
|
e2 = e2->next_callee)
|
|
;
|
|
else
|
|
{
|
|
e2 = e;
|
|
/* We can take advantage of the call stmt hash. */
|
|
if (e2->call_stmt)
|
|
{
|
|
e = cgraph_edge (e->caller, e2->call_stmt);
|
|
gcc_assert (e->speculative && !e->indirect_unknown_callee);
|
|
}
|
|
else
|
|
for (e = e->caller->callees;
|
|
e2->call_stmt != e->call_stmt
|
|
|| e2->lto_stmt_uid != e->lto_stmt_uid;
|
|
e = e->next_callee)
|
|
;
|
|
}
|
|
gcc_assert (e->speculative && e2->speculative);
|
|
direct = e;
|
|
indirect = e2;
|
|
|
|
reference = NULL;
|
|
for (i = 0; ipa_ref_list_reference_iterate (&e->caller->ref_list,
|
|
i, ref); i++)
|
|
if (ref->speculative
|
|
&& ((ref->stmt && ref->stmt == e->call_stmt)
|
|
|| (!ref->stmt && ref->lto_stmt_uid == e->lto_stmt_uid)))
|
|
{
|
|
reference = ref;
|
|
break;
|
|
}
|
|
|
|
/* Speculative edge always consist of all three components - direct edge,
|
|
indirect and reference. */
|
|
|
|
gcc_assert (e && e2 && ref);
|
|
}
|
|
|
|
/* Redirect callee of E to N. The function does not update underlying
|
|
call expression. */
|
|
|
|
void
|
|
cgraph_redirect_edge_callee (struct cgraph_edge *e, struct cgraph_node *n)
|
|
{
|
|
/* Remove from callers list of the current callee. */
|
|
cgraph_edge_remove_callee (e);
|
|
|
|
/* Insert to callers list of the new callee. */
|
|
cgraph_set_edge_callee (e, n);
|
|
}
|
|
|
|
/* Speculative call EDGE turned out to be direct call to CALLE_DECL.
|
|
Remove the speculative call sequence and return edge representing the call.
|
|
It is up to caller to redirect the call as appropriate. */
|
|
|
|
struct cgraph_edge *
|
|
cgraph_resolve_speculation (struct cgraph_edge *edge, tree callee_decl)
|
|
{
|
|
struct cgraph_edge *e2;
|
|
struct ipa_ref *ref;
|
|
|
|
gcc_assert (edge->speculative);
|
|
cgraph_speculative_call_info (edge, e2, edge, ref);
|
|
if (!callee_decl
|
|
|| !symtab_semantically_equivalent_p (ref->referred,
|
|
symtab_get_node (callee_decl)))
|
|
{
|
|
if (dump_file)
|
|
{
|
|
if (callee_decl)
|
|
{
|
|
fprintf (dump_file, "Speculative indirect call %s/%i => %s/%i has "
|
|
"turned out to have contradicting known target ",
|
|
xstrdup (edge->caller->name ()), edge->caller->order,
|
|
xstrdup (e2->callee->name ()), e2->callee->order);
|
|
print_generic_expr (dump_file, callee_decl, 0);
|
|
fprintf (dump_file, "\n");
|
|
}
|
|
else
|
|
{
|
|
fprintf (dump_file, "Removing speculative call %s/%i => %s/%i\n",
|
|
xstrdup (edge->caller->name ()), edge->caller->order,
|
|
xstrdup (e2->callee->name ()), e2->callee->order);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
struct cgraph_edge *tmp = edge;
|
|
if (dump_file)
|
|
fprintf (dump_file, "Speculative call turned into direct call.\n");
|
|
edge = e2;
|
|
e2 = tmp;
|
|
/* FIXME: If EDGE is inlined, we should scale up the frequencies and counts
|
|
in the functions inlined through it. */
|
|
}
|
|
edge->count += e2->count;
|
|
edge->frequency += e2->frequency;
|
|
if (edge->frequency > CGRAPH_FREQ_MAX)
|
|
edge->frequency = CGRAPH_FREQ_MAX;
|
|
edge->speculative = false;
|
|
e2->speculative = false;
|
|
ipa_remove_reference (ref);
|
|
if (e2->indirect_unknown_callee || e2->inline_failed)
|
|
cgraph_remove_edge (e2);
|
|
else
|
|
cgraph_remove_node_and_inline_clones (e2->callee, NULL);
|
|
if (edge->caller->call_site_hash)
|
|
cgraph_update_edge_in_call_site_hash (edge);
|
|
return edge;
|
|
}
|
|
|
|
/* Make an indirect EDGE with an unknown callee an ordinary edge leading to
|
|
CALLEE. DELTA is an integer constant that is to be added to the this
|
|
pointer (first parameter) to compensate for skipping a thunk adjustment. */
|
|
|
|
struct cgraph_edge *
|
|
cgraph_make_edge_direct (struct cgraph_edge *edge, struct cgraph_node *callee)
|
|
{
|
|
gcc_assert (edge->indirect_unknown_callee);
|
|
|
|
/* If we are redirecting speculative call, make it non-speculative. */
|
|
if (edge->indirect_unknown_callee && edge->speculative)
|
|
{
|
|
edge = cgraph_resolve_speculation (edge, callee->decl);
|
|
|
|
/* On successful speculation just return the pre existing direct edge. */
|
|
if (!edge->indirect_unknown_callee)
|
|
return edge;
|
|
}
|
|
|
|
edge->indirect_unknown_callee = 0;
|
|
ggc_free (edge->indirect_info);
|
|
edge->indirect_info = NULL;
|
|
|
|
/* Get the edge out of the indirect edge list. */
|
|
if (edge->prev_callee)
|
|
edge->prev_callee->next_callee = edge->next_callee;
|
|
if (edge->next_callee)
|
|
edge->next_callee->prev_callee = edge->prev_callee;
|
|
if (!edge->prev_callee)
|
|
edge->caller->indirect_calls = edge->next_callee;
|
|
|
|
/* Put it into the normal callee list */
|
|
edge->prev_callee = NULL;
|
|
edge->next_callee = edge->caller->callees;
|
|
if (edge->caller->callees)
|
|
edge->caller->callees->prev_callee = edge;
|
|
edge->caller->callees = edge;
|
|
|
|
/* Insert to callers list of the new callee. */
|
|
cgraph_set_edge_callee (edge, callee);
|
|
|
|
if (edge->call_stmt)
|
|
edge->call_stmt_cannot_inline_p
|
|
= !gimple_check_call_matching_types (edge->call_stmt, callee->decl,
|
|
false);
|
|
|
|
/* We need to re-determine the inlining status of the edge. */
|
|
initialize_inline_failed (edge);
|
|
return edge;
|
|
}
|
|
|
|
/* If necessary, change the function declaration in the call statement
|
|
associated with E so that it corresponds to the edge callee. */
|
|
|
|
gimple
|
|
cgraph_redirect_edge_call_stmt_to_callee (struct cgraph_edge *e)
|
|
{
|
|
tree decl = gimple_call_fndecl (e->call_stmt);
|
|
tree lhs = gimple_call_lhs (e->call_stmt);
|
|
gimple new_stmt;
|
|
gimple_stmt_iterator gsi;
|
|
#ifdef ENABLE_CHECKING
|
|
struct cgraph_node *node;
|
|
#endif
|
|
|
|
if (e->speculative)
|
|
{
|
|
struct cgraph_edge *e2;
|
|
gimple new_stmt;
|
|
struct ipa_ref *ref;
|
|
|
|
cgraph_speculative_call_info (e, e, e2, ref);
|
|
/* If there already is an direct call (i.e. as a result of inliner's
|
|
substitution), forget about speculating. */
|
|
if (decl)
|
|
e = cgraph_resolve_speculation (e, decl);
|
|
/* If types do not match, speculation was likely wrong.
|
|
The direct edge was posisbly redirected to the clone with a different
|
|
signature. We did not update the call statement yet, so compare it
|
|
with the reference that still points to the proper type. */
|
|
else if (!gimple_check_call_matching_types (e->call_stmt,
|
|
ref->referred->decl,
|
|
true))
|
|
{
|
|
if (dump_file)
|
|
fprintf (dump_file, "Not expanding speculative call of %s/%i -> %s/%i\n"
|
|
"Type mismatch.\n",
|
|
xstrdup (e->caller->name ()),
|
|
e->caller->order,
|
|
xstrdup (e->callee->name ()),
|
|
e->callee->order);
|
|
e = cgraph_resolve_speculation (e, NULL);
|
|
/* We are producing the final function body and will throw away the
|
|
callgraph edges really soon. Reset the counts/frequencies to
|
|
keep verifier happy in the case of roundoff errors. */
|
|
e->count = gimple_bb (e->call_stmt)->count;
|
|
e->frequency = compute_call_stmt_bb_frequency
|
|
(e->caller->decl, gimple_bb (e->call_stmt));
|
|
}
|
|
/* Expand speculation into GIMPLE code. */
|
|
else
|
|
{
|
|
if (dump_file)
|
|
fprintf (dump_file,
|
|
"Expanding speculative call of %s/%i -> %s/%i count:"
|
|
HOST_WIDEST_INT_PRINT_DEC"\n",
|
|
xstrdup (e->caller->name ()),
|
|
e->caller->order,
|
|
xstrdup (e->callee->name ()),
|
|
e->callee->order,
|
|
(HOST_WIDEST_INT)e->count);
|
|
gcc_assert (e2->speculative);
|
|
push_cfun (DECL_STRUCT_FUNCTION (e->caller->decl));
|
|
new_stmt = gimple_ic (e->call_stmt, cgraph (ref->referred),
|
|
e->count || e2->count
|
|
? RDIV (e->count * REG_BR_PROB_BASE,
|
|
e->count + e2->count)
|
|
: e->frequency || e2->frequency
|
|
? RDIV (e->frequency * REG_BR_PROB_BASE,
|
|
e->frequency + e2->frequency)
|
|
: REG_BR_PROB_BASE / 2,
|
|
e->count, e->count + e2->count);
|
|
e->speculative = false;
|
|
cgraph_set_call_stmt_including_clones (e->caller, e->call_stmt,
|
|
new_stmt, false);
|
|
e->frequency = compute_call_stmt_bb_frequency
|
|
(e->caller->decl, gimple_bb (e->call_stmt));
|
|
e2->frequency = compute_call_stmt_bb_frequency
|
|
(e2->caller->decl, gimple_bb (e2->call_stmt));
|
|
e2->speculative = false;
|
|
ref->speculative = false;
|
|
ref->stmt = NULL;
|
|
/* Indirect edges are not both in the call site hash.
|
|
get it updated. */
|
|
if (e->caller->call_site_hash)
|
|
cgraph_update_edge_in_call_site_hash (e2);
|
|
pop_cfun ();
|
|
/* Continue redirecting E to proper target. */
|
|
}
|
|
}
|
|
|
|
if (e->indirect_unknown_callee
|
|
|| decl == e->callee->decl)
|
|
return e->call_stmt;
|
|
|
|
#ifdef ENABLE_CHECKING
|
|
if (decl)
|
|
{
|
|
node = cgraph_get_node (decl);
|
|
gcc_assert (!node || !node->clone.combined_args_to_skip);
|
|
}
|
|
#endif
|
|
|
|
if (cgraph_dump_file)
|
|
{
|
|
fprintf (cgraph_dump_file, "updating call of %s/%i -> %s/%i: ",
|
|
xstrdup (e->caller->name ()), e->caller->order,
|
|
xstrdup (e->callee->name ()), e->callee->order);
|
|
print_gimple_stmt (cgraph_dump_file, e->call_stmt, 0, dump_flags);
|
|
if (e->callee->clone.combined_args_to_skip)
|
|
{
|
|
fprintf (cgraph_dump_file, " combined args to skip: ");
|
|
dump_bitmap (cgraph_dump_file,
|
|
e->callee->clone.combined_args_to_skip);
|
|
}
|
|
}
|
|
|
|
if (e->callee->clone.combined_args_to_skip)
|
|
{
|
|
int lp_nr;
|
|
|
|
new_stmt
|
|
= gimple_call_copy_skip_args (e->call_stmt,
|
|
e->callee->clone.combined_args_to_skip);
|
|
gimple_call_set_fndecl (new_stmt, e->callee->decl);
|
|
gimple_call_set_fntype (new_stmt, gimple_call_fntype (e->call_stmt));
|
|
|
|
if (gimple_vdef (new_stmt)
|
|
&& TREE_CODE (gimple_vdef (new_stmt)) == SSA_NAME)
|
|
SSA_NAME_DEF_STMT (gimple_vdef (new_stmt)) = new_stmt;
|
|
|
|
gsi = gsi_for_stmt (e->call_stmt);
|
|
gsi_replace (&gsi, new_stmt, false);
|
|
/* We need to defer cleaning EH info on the new statement to
|
|
fixup-cfg. We may not have dominator information at this point
|
|
and thus would end up with unreachable blocks and have no way
|
|
to communicate that we need to run CFG cleanup then. */
|
|
lp_nr = lookup_stmt_eh_lp (e->call_stmt);
|
|
if (lp_nr != 0)
|
|
{
|
|
remove_stmt_from_eh_lp (e->call_stmt);
|
|
add_stmt_to_eh_lp (new_stmt, lp_nr);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
new_stmt = e->call_stmt;
|
|
gimple_call_set_fndecl (new_stmt, e->callee->decl);
|
|
update_stmt_fn (DECL_STRUCT_FUNCTION (e->caller->decl), new_stmt);
|
|
}
|
|
|
|
/* If the call becomes noreturn, remove the lhs. */
|
|
if (lhs && (gimple_call_flags (new_stmt) & ECF_NORETURN))
|
|
{
|
|
if (TREE_CODE (lhs) == SSA_NAME)
|
|
{
|
|
tree var = create_tmp_reg_fn (DECL_STRUCT_FUNCTION (e->caller->decl),
|
|
TREE_TYPE (lhs), NULL);
|
|
var = get_or_create_ssa_default_def
|
|
(DECL_STRUCT_FUNCTION (e->caller->decl), var);
|
|
gimple set_stmt = gimple_build_assign (lhs, var);
|
|
gsi = gsi_for_stmt (new_stmt);
|
|
gsi_insert_before_without_update (&gsi, set_stmt, GSI_SAME_STMT);
|
|
update_stmt_fn (DECL_STRUCT_FUNCTION (e->caller->decl), set_stmt);
|
|
}
|
|
gimple_call_set_lhs (new_stmt, NULL_TREE);
|
|
update_stmt_fn (DECL_STRUCT_FUNCTION (e->caller->decl), new_stmt);
|
|
}
|
|
|
|
/* If new callee has no static chain, remove it. */
|
|
if (gimple_call_chain (new_stmt) && !DECL_STATIC_CHAIN (e->callee->decl))
|
|
{
|
|
gimple_call_set_chain (new_stmt, NULL);
|
|
update_stmt_fn (DECL_STRUCT_FUNCTION (e->caller->decl), new_stmt);
|
|
}
|
|
|
|
cgraph_set_call_stmt_including_clones (e->caller, e->call_stmt, new_stmt, false);
|
|
|
|
if (cgraph_dump_file)
|
|
{
|
|
fprintf (cgraph_dump_file, " updated to:");
|
|
print_gimple_stmt (cgraph_dump_file, e->call_stmt, 0, dump_flags);
|
|
}
|
|
return new_stmt;
|
|
}
|
|
|
|
/* Update or remove the corresponding cgraph edge if a GIMPLE_CALL
|
|
OLD_STMT changed into NEW_STMT. OLD_CALL is gimple_call_fndecl
|
|
of OLD_STMT if it was previously call statement.
|
|
If NEW_STMT is NULL, the call has been dropped without any
|
|
replacement. */
|
|
|
|
static void
|
|
cgraph_update_edges_for_call_stmt_node (struct cgraph_node *node,
|
|
gimple old_stmt, tree old_call,
|
|
gimple new_stmt)
|
|
{
|
|
tree new_call = (new_stmt && is_gimple_call (new_stmt))
|
|
? gimple_call_fndecl (new_stmt) : 0;
|
|
|
|
/* We are seeing indirect calls, then there is nothing to update. */
|
|
if (!new_call && !old_call)
|
|
return;
|
|
/* See if we turned indirect call into direct call or folded call to one builtin
|
|
into different builtin. */
|
|
if (old_call != new_call)
|
|
{
|
|
struct cgraph_edge *e = cgraph_edge (node, old_stmt);
|
|
struct cgraph_edge *ne = NULL;
|
|
gcov_type count;
|
|
int frequency;
|
|
|
|
if (e)
|
|
{
|
|
/* See if the edge is already there and has the correct callee. It
|
|
might be so because of indirect inlining has already updated
|
|
it. We also might've cloned and redirected the edge. */
|
|
if (new_call && e->callee)
|
|
{
|
|
struct cgraph_node *callee = e->callee;
|
|
while (callee)
|
|
{
|
|
if (callee->decl == new_call
|
|
|| callee->former_clone_of == new_call)
|
|
{
|
|
cgraph_set_call_stmt (e, new_stmt);
|
|
return;
|
|
}
|
|
callee = callee->clone_of;
|
|
}
|
|
}
|
|
|
|
/* Otherwise remove edge and create new one; we can't simply redirect
|
|
since function has changed, so inline plan and other information
|
|
attached to edge is invalid. */
|
|
count = e->count;
|
|
frequency = e->frequency;
|
|
if (e->indirect_unknown_callee || e->inline_failed)
|
|
cgraph_remove_edge (e);
|
|
else
|
|
cgraph_remove_node_and_inline_clones (e->callee, NULL);
|
|
}
|
|
else if (new_call)
|
|
{
|
|
/* We are seeing new direct call; compute profile info based on BB. */
|
|
basic_block bb = gimple_bb (new_stmt);
|
|
count = bb->count;
|
|
frequency = compute_call_stmt_bb_frequency (current_function_decl,
|
|
bb);
|
|
}
|
|
|
|
if (new_call)
|
|
{
|
|
ne = cgraph_create_edge (node, cgraph_get_create_node (new_call),
|
|
new_stmt, count, frequency);
|
|
gcc_assert (ne->inline_failed);
|
|
}
|
|
}
|
|
/* We only updated the call stmt; update pointer in cgraph edge.. */
|
|
else if (old_stmt != new_stmt)
|
|
cgraph_set_call_stmt (cgraph_edge (node, old_stmt), new_stmt);
|
|
}
|
|
|
|
/* Update or remove the corresponding cgraph edge if a GIMPLE_CALL
|
|
OLD_STMT changed into NEW_STMT. OLD_DECL is gimple_call_fndecl
|
|
of OLD_STMT before it was updated (updating can happen inplace). */
|
|
|
|
void
|
|
cgraph_update_edges_for_call_stmt (gimple old_stmt, tree old_decl, gimple new_stmt)
|
|
{
|
|
struct cgraph_node *orig = cgraph_get_node (cfun->decl);
|
|
struct cgraph_node *node;
|
|
|
|
gcc_checking_assert (orig);
|
|
cgraph_update_edges_for_call_stmt_node (orig, old_stmt, old_decl, new_stmt);
|
|
if (orig->clones)
|
|
for (node = orig->clones; node != orig;)
|
|
{
|
|
cgraph_update_edges_for_call_stmt_node (node, old_stmt, old_decl, new_stmt);
|
|
if (node->clones)
|
|
node = node->clones;
|
|
else if (node->next_sibling_clone)
|
|
node = node->next_sibling_clone;
|
|
else
|
|
{
|
|
while (node != orig && !node->next_sibling_clone)
|
|
node = node->clone_of;
|
|
if (node != orig)
|
|
node = node->next_sibling_clone;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Remove all callees from the node. */
|
|
|
|
void
|
|
cgraph_node_remove_callees (struct cgraph_node *node)
|
|
{
|
|
struct cgraph_edge *e, *f;
|
|
|
|
/* It is sufficient to remove the edges from the lists of callers of
|
|
the callees. The callee list of the node can be zapped with one
|
|
assignment. */
|
|
for (e = node->callees; e; e = f)
|
|
{
|
|
f = e->next_callee;
|
|
cgraph_call_edge_removal_hooks (e);
|
|
if (!e->indirect_unknown_callee)
|
|
cgraph_edge_remove_callee (e);
|
|
cgraph_free_edge (e);
|
|
}
|
|
for (e = node->indirect_calls; e; e = f)
|
|
{
|
|
f = e->next_callee;
|
|
cgraph_call_edge_removal_hooks (e);
|
|
if (!e->indirect_unknown_callee)
|
|
cgraph_edge_remove_callee (e);
|
|
cgraph_free_edge (e);
|
|
}
|
|
node->indirect_calls = NULL;
|
|
node->callees = NULL;
|
|
if (node->call_site_hash)
|
|
{
|
|
htab_delete (node->call_site_hash);
|
|
node->call_site_hash = NULL;
|
|
}
|
|
}
|
|
|
|
/* Remove all callers from the node. */
|
|
|
|
static void
|
|
cgraph_node_remove_callers (struct cgraph_node *node)
|
|
{
|
|
struct cgraph_edge *e, *f;
|
|
|
|
/* It is sufficient to remove the edges from the lists of callees of
|
|
the callers. The caller list of the node can be zapped with one
|
|
assignment. */
|
|
for (e = node->callers; e; e = f)
|
|
{
|
|
f = e->next_caller;
|
|
cgraph_call_edge_removal_hooks (e);
|
|
cgraph_edge_remove_caller (e);
|
|
cgraph_free_edge (e);
|
|
}
|
|
node->callers = NULL;
|
|
}
|
|
|
|
/* Helper function for cgraph_release_function_body and free_lang_data.
|
|
It releases body from function DECL without having to inspect its
|
|
possibly non-existent symtab node. */
|
|
|
|
void
|
|
release_function_body (tree decl)
|
|
{
|
|
if (DECL_STRUCT_FUNCTION (decl))
|
|
{
|
|
push_cfun (DECL_STRUCT_FUNCTION (decl));
|
|
if (cfun->cfg
|
|
&& current_loops)
|
|
{
|
|
cfun->curr_properties &= ~PROP_loops;
|
|
loop_optimizer_finalize ();
|
|
}
|
|
if (cfun->gimple_df)
|
|
{
|
|
delete_tree_ssa ();
|
|
delete_tree_cfg_annotations ();
|
|
cfun->eh = NULL;
|
|
}
|
|
if (cfun->cfg)
|
|
{
|
|
gcc_assert (dom_computed[0] == DOM_NONE);
|
|
gcc_assert (dom_computed[1] == DOM_NONE);
|
|
clear_edges ();
|
|
cfun->cfg = NULL;
|
|
}
|
|
if (cfun->value_histograms)
|
|
free_histograms ();
|
|
pop_cfun ();
|
|
gimple_set_body (decl, NULL);
|
|
/* Struct function hangs a lot of data that would leak if we didn't
|
|
removed all pointers to it. */
|
|
ggc_free (DECL_STRUCT_FUNCTION (decl));
|
|
DECL_STRUCT_FUNCTION (decl) = NULL;
|
|
}
|
|
DECL_SAVED_TREE (decl) = NULL;
|
|
}
|
|
|
|
/* Release memory used to represent body of function NODE.
|
|
Use this only for functions that are released before being translated to
|
|
target code (i.e. RTL). Functions that are compiled to RTL and beyond
|
|
are free'd in final.c via free_after_compilation(). */
|
|
|
|
void
|
|
cgraph_release_function_body (struct cgraph_node *node)
|
|
{
|
|
node->ipa_transforms_to_apply.release ();
|
|
if (!node->used_as_abstract_origin && cgraph_state != CGRAPH_STATE_PARSING)
|
|
{
|
|
DECL_RESULT (node->decl) = NULL;
|
|
DECL_ARGUMENTS (node->decl) = NULL;
|
|
}
|
|
/* If the node is abstract and needed, then do not clear DECL_INITIAL
|
|
of its associated function function declaration because it's
|
|
needed to emit debug info later. */
|
|
if (!node->used_as_abstract_origin && DECL_INITIAL (node->decl))
|
|
DECL_INITIAL (node->decl) = error_mark_node;
|
|
release_function_body (node->decl);
|
|
if (node->lto_file_data)
|
|
lto_free_function_in_decl_state_for_node (node);
|
|
}
|
|
|
|
/* Remove the node from cgraph. */
|
|
|
|
void
|
|
cgraph_remove_node (struct cgraph_node *node)
|
|
{
|
|
struct cgraph_node *n;
|
|
int uid = node->uid;
|
|
|
|
cgraph_call_node_removal_hooks (node);
|
|
cgraph_node_remove_callers (node);
|
|
cgraph_node_remove_callees (node);
|
|
node->ipa_transforms_to_apply.release ();
|
|
|
|
/* Incremental inlining access removed nodes stored in the postorder list.
|
|
*/
|
|
node->force_output = false;
|
|
node->forced_by_abi = false;
|
|
for (n = node->nested; n; n = n->next_nested)
|
|
n->origin = NULL;
|
|
node->nested = NULL;
|
|
if (node->origin)
|
|
{
|
|
struct cgraph_node **node2 = &node->origin->nested;
|
|
|
|
while (*node2 != node)
|
|
node2 = &(*node2)->next_nested;
|
|
*node2 = node->next_nested;
|
|
}
|
|
symtab_unregister_node (node);
|
|
if (node->prev_sibling_clone)
|
|
node->prev_sibling_clone->next_sibling_clone = node->next_sibling_clone;
|
|
else if (node->clone_of)
|
|
node->clone_of->clones = node->next_sibling_clone;
|
|
if (node->next_sibling_clone)
|
|
node->next_sibling_clone->prev_sibling_clone = node->prev_sibling_clone;
|
|
if (node->clones)
|
|
{
|
|
struct cgraph_node *n, *next;
|
|
|
|
if (node->clone_of)
|
|
{
|
|
for (n = node->clones; n->next_sibling_clone; n = n->next_sibling_clone)
|
|
n->clone_of = node->clone_of;
|
|
n->clone_of = node->clone_of;
|
|
n->next_sibling_clone = node->clone_of->clones;
|
|
if (node->clone_of->clones)
|
|
node->clone_of->clones->prev_sibling_clone = n;
|
|
node->clone_of->clones = node->clones;
|
|
}
|
|
else
|
|
{
|
|
/* We are removing node with clones. This makes clones inconsistent,
|
|
but assume they will be removed subsequently and just keep clone
|
|
tree intact. This can happen in unreachable function removal since
|
|
we remove unreachable functions in random order, not by bottom-up
|
|
walk of clone trees. */
|
|
for (n = node->clones; n; n = next)
|
|
{
|
|
next = n->next_sibling_clone;
|
|
n->next_sibling_clone = NULL;
|
|
n->prev_sibling_clone = NULL;
|
|
n->clone_of = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* While all the clones are removed after being proceeded, the function
|
|
itself is kept in the cgraph even after it is compiled. Check whether
|
|
we are done with this body and reclaim it proactively if this is the case.
|
|
*/
|
|
if (cgraph_state != CGRAPH_LTO_STREAMING)
|
|
{
|
|
n = cgraph_get_node (node->decl);
|
|
if (!n
|
|
|| (!n->clones && !n->clone_of && !n->global.inlined_to
|
|
&& (cgraph_global_info_ready
|
|
&& (TREE_ASM_WRITTEN (n->decl)
|
|
|| DECL_EXTERNAL (n->decl)
|
|
|| !n->analyzed
|
|
|| (!flag_wpa && n->in_other_partition)))))
|
|
cgraph_release_function_body (node);
|
|
}
|
|
|
|
node->decl = NULL;
|
|
if (node->call_site_hash)
|
|
{
|
|
htab_delete (node->call_site_hash);
|
|
node->call_site_hash = NULL;
|
|
}
|
|
cgraph_n_nodes--;
|
|
|
|
/* Clear out the node to NULL all pointers and add the node to the free
|
|
list. */
|
|
memset (node, 0, sizeof (*node));
|
|
node->type = SYMTAB_FUNCTION;
|
|
node->uid = uid;
|
|
SET_NEXT_FREE_NODE (node, free_nodes);
|
|
free_nodes = node;
|
|
}
|
|
|
|
/* Likewise indicate that a node is having address taken. */
|
|
|
|
void
|
|
cgraph_mark_address_taken_node (struct cgraph_node *node)
|
|
{
|
|
/* Indirect inlining can figure out that all uses of the address are
|
|
inlined. */
|
|
if (node->global.inlined_to)
|
|
{
|
|
gcc_assert (cfun->after_inlining);
|
|
gcc_assert (node->callers->indirect_inlining_edge);
|
|
return;
|
|
}
|
|
/* FIXME: address_taken flag is used both as a shortcut for testing whether
|
|
IPA_REF_ADDR reference exists (and thus it should be set on node
|
|
representing alias we take address of) and as a test whether address
|
|
of the object was taken (and thus it should be set on node alias is
|
|
referring to). We should remove the first use and the remove the
|
|
following set. */
|
|
node->address_taken = 1;
|
|
node = cgraph_function_or_thunk_node (node, NULL);
|
|
node->address_taken = 1;
|
|
}
|
|
|
|
/* Return local info for the compiled function. */
|
|
|
|
struct cgraph_local_info *
|
|
cgraph_local_info (tree decl)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
|
|
node = cgraph_get_node (decl);
|
|
if (!node)
|
|
return NULL;
|
|
return &node->local;
|
|
}
|
|
|
|
/* Return local info for the compiled function. */
|
|
|
|
struct cgraph_global_info *
|
|
cgraph_global_info (tree decl)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
gcc_assert (TREE_CODE (decl) == FUNCTION_DECL && cgraph_global_info_ready);
|
|
node = cgraph_get_node (decl);
|
|
if (!node)
|
|
return NULL;
|
|
return &node->global;
|
|
}
|
|
|
|
/* Return local info for the compiled function. */
|
|
|
|
struct cgraph_rtl_info *
|
|
cgraph_rtl_info (tree decl)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
gcc_assert (TREE_CODE (decl) == FUNCTION_DECL);
|
|
node = cgraph_get_node (decl);
|
|
if (!node
|
|
|| (decl != current_function_decl
|
|
&& !TREE_ASM_WRITTEN (node->decl)))
|
|
return NULL;
|
|
return &node->rtl;
|
|
}
|
|
|
|
/* Return a string describing the failure REASON. */
|
|
|
|
const char*
|
|
cgraph_inline_failed_string (cgraph_inline_failed_t reason)
|
|
{
|
|
#undef DEFCIFCODE
|
|
#define DEFCIFCODE(code, type, string) string,
|
|
|
|
static const char *cif_string_table[CIF_N_REASONS] = {
|
|
#include "cif-code.def"
|
|
};
|
|
|
|
/* Signedness of an enum type is implementation defined, so cast it
|
|
to unsigned before testing. */
|
|
gcc_assert ((unsigned) reason < CIF_N_REASONS);
|
|
return cif_string_table[reason];
|
|
}
|
|
|
|
/* Return a type describing the failure REASON. */
|
|
|
|
cgraph_inline_failed_type_t
|
|
cgraph_inline_failed_type (cgraph_inline_failed_t reason)
|
|
{
|
|
#undef DEFCIFCODE
|
|
#define DEFCIFCODE(code, type, string) type,
|
|
|
|
static cgraph_inline_failed_type_t cif_type_table[CIF_N_REASONS] = {
|
|
#include "cif-code.def"
|
|
};
|
|
|
|
/* Signedness of an enum type is implementation defined, so cast it
|
|
to unsigned before testing. */
|
|
gcc_assert ((unsigned) reason < CIF_N_REASONS);
|
|
return cif_type_table[reason];
|
|
}
|
|
|
|
/* Names used to print out the availability enum. */
|
|
const char * const cgraph_availability_names[] =
|
|
{"unset", "not_available", "overwritable", "available", "local"};
|
|
|
|
|
|
/* Dump call graph node NODE to file F. */
|
|
|
|
void
|
|
dump_cgraph_node (FILE *f, struct cgraph_node *node)
|
|
{
|
|
struct cgraph_edge *edge;
|
|
int indirect_calls_count = 0;
|
|
|
|
dump_symtab_base (f, node);
|
|
|
|
if (node->global.inlined_to)
|
|
fprintf (f, " Function %s/%i is inline copy in %s/%i\n",
|
|
xstrdup (node->name ()),
|
|
node->order,
|
|
xstrdup (node->global.inlined_to->name ()),
|
|
node->global.inlined_to->order);
|
|
if (node->clone_of)
|
|
fprintf (f, " Clone of %s/%i\n",
|
|
node->clone_of->asm_name (),
|
|
node->clone_of->order);
|
|
if (cgraph_function_flags_ready)
|
|
fprintf (f, " Availability: %s\n",
|
|
cgraph_availability_names [cgraph_function_body_availability (node)]);
|
|
|
|
if (node->profile_id)
|
|
fprintf (f, " Profile id: %i\n",
|
|
node->profile_id);
|
|
fprintf (f, " First run: %i\n", node->tp_first_run);
|
|
fprintf (f, " Function flags:");
|
|
if (node->count)
|
|
fprintf (f, " executed "HOST_WIDEST_INT_PRINT_DEC"x",
|
|
(HOST_WIDEST_INT)node->count);
|
|
if (node->origin)
|
|
fprintf (f, " nested in: %s", node->origin->asm_name ());
|
|
if (gimple_has_body_p (node->decl))
|
|
fprintf (f, " body");
|
|
if (node->process)
|
|
fprintf (f, " process");
|
|
if (node->local.local)
|
|
fprintf (f, " local");
|
|
if (node->local.redefined_extern_inline)
|
|
fprintf (f, " redefined_extern_inline");
|
|
if (node->only_called_at_startup)
|
|
fprintf (f, " only_called_at_startup");
|
|
if (node->only_called_at_exit)
|
|
fprintf (f, " only_called_at_exit");
|
|
if (node->tm_clone)
|
|
fprintf (f, " tm_clone");
|
|
|
|
fprintf (f, "\n");
|
|
|
|
if (node->thunk.thunk_p)
|
|
{
|
|
fprintf (f, " Thunk");
|
|
if (node->thunk.alias)
|
|
fprintf (f, " of %s (asm: %s)",
|
|
lang_hooks.decl_printable_name (node->thunk.alias, 2),
|
|
IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (node->thunk.alias)));
|
|
fprintf (f, " fixed offset %i virtual value %i has "
|
|
"virtual offset %i)\n",
|
|
(int)node->thunk.fixed_offset,
|
|
(int)node->thunk.virtual_value,
|
|
(int)node->thunk.virtual_offset_p);
|
|
}
|
|
if (node->alias && node->thunk.alias
|
|
&& DECL_P (node->thunk.alias))
|
|
{
|
|
fprintf (f, " Alias of %s",
|
|
lang_hooks.decl_printable_name (node->thunk.alias, 2));
|
|
if (DECL_ASSEMBLER_NAME_SET_P (node->thunk.alias))
|
|
fprintf (f, " (asm: %s)",
|
|
IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (node->thunk.alias)));
|
|
fprintf (f, "\n");
|
|
}
|
|
|
|
fprintf (f, " Called by: ");
|
|
|
|
for (edge = node->callers; edge; edge = edge->next_caller)
|
|
{
|
|
fprintf (f, "%s/%i ", edge->caller->asm_name (),
|
|
edge->caller->order);
|
|
if (edge->count)
|
|
fprintf (f, "("HOST_WIDEST_INT_PRINT_DEC"x) ",
|
|
(HOST_WIDEST_INT)edge->count);
|
|
if (edge->frequency)
|
|
fprintf (f, "(%.2f per call) ",
|
|
edge->frequency / (double)CGRAPH_FREQ_BASE);
|
|
if (edge->speculative)
|
|
fprintf (f, "(speculative) ");
|
|
if (!edge->inline_failed)
|
|
fprintf (f, "(inlined) ");
|
|
if (edge->indirect_inlining_edge)
|
|
fprintf (f, "(indirect_inlining) ");
|
|
if (edge->can_throw_external)
|
|
fprintf (f, "(can throw external) ");
|
|
}
|
|
|
|
fprintf (f, "\n Calls: ");
|
|
for (edge = node->callees; edge; edge = edge->next_callee)
|
|
{
|
|
fprintf (f, "%s/%i ", edge->callee->asm_name (),
|
|
edge->callee->order);
|
|
if (edge->speculative)
|
|
fprintf (f, "(speculative) ");
|
|
if (!edge->inline_failed)
|
|
fprintf (f, "(inlined) ");
|
|
if (edge->indirect_inlining_edge)
|
|
fprintf (f, "(indirect_inlining) ");
|
|
if (edge->count)
|
|
fprintf (f, "("HOST_WIDEST_INT_PRINT_DEC"x) ",
|
|
(HOST_WIDEST_INT)edge->count);
|
|
if (edge->frequency)
|
|
fprintf (f, "(%.2f per call) ",
|
|
edge->frequency / (double)CGRAPH_FREQ_BASE);
|
|
if (edge->can_throw_external)
|
|
fprintf (f, "(can throw external) ");
|
|
}
|
|
fprintf (f, "\n");
|
|
|
|
for (edge = node->indirect_calls; edge; edge = edge->next_callee)
|
|
indirect_calls_count++;
|
|
if (indirect_calls_count)
|
|
fprintf (f, " Has %i outgoing edges for indirect calls.\n",
|
|
indirect_calls_count);
|
|
}
|
|
|
|
|
|
/* Dump call graph node NODE to stderr. */
|
|
|
|
DEBUG_FUNCTION void
|
|
debug_cgraph_node (struct cgraph_node *node)
|
|
{
|
|
dump_cgraph_node (stderr, node);
|
|
}
|
|
|
|
|
|
/* Dump the callgraph to file F. */
|
|
|
|
void
|
|
dump_cgraph (FILE *f)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
fprintf (f, "callgraph:\n\n");
|
|
FOR_EACH_FUNCTION (node)
|
|
dump_cgraph_node (f, node);
|
|
}
|
|
|
|
|
|
/* Dump the call graph to stderr. */
|
|
|
|
DEBUG_FUNCTION void
|
|
debug_cgraph (void)
|
|
{
|
|
dump_cgraph (stderr);
|
|
}
|
|
|
|
/* Return true when the DECL can possibly be inlined. */
|
|
bool
|
|
cgraph_function_possibly_inlined_p (tree decl)
|
|
{
|
|
if (!cgraph_global_info_ready)
|
|
return !DECL_UNINLINABLE (decl);
|
|
return DECL_POSSIBLY_INLINED (decl);
|
|
}
|
|
|
|
/* NODE is no longer nested function; update cgraph accordingly. */
|
|
void
|
|
cgraph_unnest_node (struct cgraph_node *node)
|
|
{
|
|
struct cgraph_node **node2 = &node->origin->nested;
|
|
gcc_assert (node->origin);
|
|
|
|
while (*node2 != node)
|
|
node2 = &(*node2)->next_nested;
|
|
*node2 = node->next_nested;
|
|
node->origin = NULL;
|
|
}
|
|
|
|
/* Return function availability. See cgraph.h for description of individual
|
|
return values. */
|
|
enum availability
|
|
cgraph_function_body_availability (struct cgraph_node *node)
|
|
{
|
|
enum availability avail;
|
|
if (!node->analyzed)
|
|
avail = AVAIL_NOT_AVAILABLE;
|
|
else if (node->local.local)
|
|
avail = AVAIL_LOCAL;
|
|
else if (node->alias && node->weakref)
|
|
cgraph_function_or_thunk_node (node, &avail);
|
|
else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (node->decl)))
|
|
avail = AVAIL_OVERWRITABLE;
|
|
else if (!node->externally_visible)
|
|
avail = AVAIL_AVAILABLE;
|
|
/* Inline functions are safe to be analyzed even if their symbol can
|
|
be overwritten at runtime. It is not meaningful to enforce any sane
|
|
behaviour on replacing inline function by different body. */
|
|
else if (DECL_DECLARED_INLINE_P (node->decl))
|
|
avail = AVAIL_AVAILABLE;
|
|
|
|
/* If the function can be overwritten, return OVERWRITABLE. Take
|
|
care at least of two notable extensions - the COMDAT functions
|
|
used to share template instantiations in C++ (this is symmetric
|
|
to code cp_cannot_inline_tree_fn and probably shall be shared and
|
|
the inlinability hooks completely eliminated).
|
|
|
|
??? Does the C++ one definition rule allow us to always return
|
|
AVAIL_AVAILABLE here? That would be good reason to preserve this
|
|
bit. */
|
|
|
|
else if (decl_replaceable_p (node->decl)
|
|
&& !DECL_EXTERNAL (node->decl))
|
|
avail = AVAIL_OVERWRITABLE;
|
|
else avail = AVAIL_AVAILABLE;
|
|
|
|
return avail;
|
|
}
|
|
|
|
/* Worker for cgraph_node_can_be_local_p. */
|
|
static bool
|
|
cgraph_node_cannot_be_local_p_1 (struct cgraph_node *node,
|
|
void *data ATTRIBUTE_UNUSED)
|
|
{
|
|
return !(!node->force_output
|
|
&& ((DECL_COMDAT (node->decl)
|
|
&& !node->forced_by_abi
|
|
&& !symtab_used_from_object_file_p (node)
|
|
&& !node->same_comdat_group)
|
|
|| !node->externally_visible));
|
|
}
|
|
|
|
/* Return true if NODE can be made local for API change.
|
|
Extern inline functions and C++ COMDAT functions can be made local
|
|
at the expense of possible code size growth if function is used in multiple
|
|
compilation units. */
|
|
bool
|
|
cgraph_node_can_be_local_p (struct cgraph_node *node)
|
|
{
|
|
return (!node->address_taken
|
|
&& !cgraph_for_node_and_aliases (node,
|
|
cgraph_node_cannot_be_local_p_1,
|
|
NULL, true));
|
|
}
|
|
|
|
/* Call calback on NODE, thunks and aliases associated to NODE.
|
|
When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are
|
|
skipped. */
|
|
|
|
bool
|
|
cgraph_for_node_thunks_and_aliases (struct cgraph_node *node,
|
|
bool (*callback) (struct cgraph_node *, void *),
|
|
void *data,
|
|
bool include_overwritable)
|
|
{
|
|
struct cgraph_edge *e;
|
|
int i;
|
|
struct ipa_ref *ref;
|
|
|
|
if (callback (node, data))
|
|
return true;
|
|
for (e = node->callers; e; e = e->next_caller)
|
|
if (e->caller->thunk.thunk_p
|
|
&& (include_overwritable
|
|
|| cgraph_function_body_availability (e->caller) > AVAIL_OVERWRITABLE))
|
|
if (cgraph_for_node_thunks_and_aliases (e->caller, callback, data,
|
|
include_overwritable))
|
|
return true;
|
|
for (i = 0; ipa_ref_list_referring_iterate (&node->ref_list, i, ref); i++)
|
|
if (ref->use == IPA_REF_ALIAS)
|
|
{
|
|
struct cgraph_node *alias = ipa_ref_referring_node (ref);
|
|
if (include_overwritable
|
|
|| cgraph_function_body_availability (alias) > AVAIL_OVERWRITABLE)
|
|
if (cgraph_for_node_thunks_and_aliases (alias, callback, data,
|
|
include_overwritable))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Call calback on NODE and aliases associated to NODE.
|
|
When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are
|
|
skipped. */
|
|
|
|
bool
|
|
cgraph_for_node_and_aliases (struct cgraph_node *node,
|
|
bool (*callback) (struct cgraph_node *, void *),
|
|
void *data,
|
|
bool include_overwritable)
|
|
{
|
|
int i;
|
|
struct ipa_ref *ref;
|
|
|
|
if (callback (node, data))
|
|
return true;
|
|
for (i = 0; ipa_ref_list_referring_iterate (&node->ref_list, i, ref); i++)
|
|
if (ref->use == IPA_REF_ALIAS)
|
|
{
|
|
struct cgraph_node *alias = ipa_ref_referring_node (ref);
|
|
if (include_overwritable
|
|
|| cgraph_function_body_availability (alias) > AVAIL_OVERWRITABLE)
|
|
if (cgraph_for_node_and_aliases (alias, callback, data,
|
|
include_overwritable))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Worker to bring NODE local. */
|
|
|
|
static bool
|
|
cgraph_make_node_local_1 (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
|
|
{
|
|
gcc_checking_assert (cgraph_node_can_be_local_p (node));
|
|
if (DECL_COMDAT (node->decl) || DECL_EXTERNAL (node->decl))
|
|
{
|
|
symtab_make_decl_local (node->decl);
|
|
|
|
node->externally_visible = false;
|
|
node->forced_by_abi = false;
|
|
node->local.local = true;
|
|
node->unique_name = (node->resolution == LDPR_PREVAILING_DEF_IRONLY
|
|
|| node->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP);
|
|
node->resolution = LDPR_PREVAILING_DEF_IRONLY;
|
|
gcc_assert (cgraph_function_body_availability (node) == AVAIL_LOCAL);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/* Bring NODE local. */
|
|
|
|
void
|
|
cgraph_make_node_local (struct cgraph_node *node)
|
|
{
|
|
cgraph_for_node_thunks_and_aliases (node, cgraph_make_node_local_1,
|
|
NULL, true);
|
|
}
|
|
|
|
/* Worker to set nothrow flag. */
|
|
|
|
static bool
|
|
cgraph_set_nothrow_flag_1 (struct cgraph_node *node, void *data)
|
|
{
|
|
struct cgraph_edge *e;
|
|
|
|
TREE_NOTHROW (node->decl) = data != NULL;
|
|
|
|
if (data != NULL)
|
|
for (e = node->callers; e; e = e->next_caller)
|
|
e->can_throw_external = false;
|
|
return false;
|
|
}
|
|
|
|
/* Set TREE_NOTHROW on NODE's decl and on aliases of NODE
|
|
if any to NOTHROW. */
|
|
|
|
void
|
|
cgraph_set_nothrow_flag (struct cgraph_node *node, bool nothrow)
|
|
{
|
|
cgraph_for_node_thunks_and_aliases (node, cgraph_set_nothrow_flag_1,
|
|
(void *)(size_t)nothrow, false);
|
|
}
|
|
|
|
/* Worker to set const flag. */
|
|
|
|
static bool
|
|
cgraph_set_const_flag_1 (struct cgraph_node *node, void *data)
|
|
{
|
|
/* Static constructors and destructors without a side effect can be
|
|
optimized out. */
|
|
if (data && !((size_t)data & 2))
|
|
{
|
|
if (DECL_STATIC_CONSTRUCTOR (node->decl))
|
|
DECL_STATIC_CONSTRUCTOR (node->decl) = 0;
|
|
if (DECL_STATIC_DESTRUCTOR (node->decl))
|
|
DECL_STATIC_DESTRUCTOR (node->decl) = 0;
|
|
}
|
|
TREE_READONLY (node->decl) = data != NULL;
|
|
DECL_LOOPING_CONST_OR_PURE_P (node->decl) = ((size_t)data & 2) != 0;
|
|
return false;
|
|
}
|
|
|
|
/* Set TREE_READONLY on NODE's decl and on aliases of NODE
|
|
if any to READONLY. */
|
|
|
|
void
|
|
cgraph_set_const_flag (struct cgraph_node *node, bool readonly, bool looping)
|
|
{
|
|
cgraph_for_node_thunks_and_aliases (node, cgraph_set_const_flag_1,
|
|
(void *)(size_t)(readonly + (int)looping * 2),
|
|
false);
|
|
}
|
|
|
|
/* Worker to set pure flag. */
|
|
|
|
static bool
|
|
cgraph_set_pure_flag_1 (struct cgraph_node *node, void *data)
|
|
{
|
|
/* Static constructors and destructors without a side effect can be
|
|
optimized out. */
|
|
if (data && !((size_t)data & 2))
|
|
{
|
|
if (DECL_STATIC_CONSTRUCTOR (node->decl))
|
|
DECL_STATIC_CONSTRUCTOR (node->decl) = 0;
|
|
if (DECL_STATIC_DESTRUCTOR (node->decl))
|
|
DECL_STATIC_DESTRUCTOR (node->decl) = 0;
|
|
}
|
|
DECL_PURE_P (node->decl) = data != NULL;
|
|
DECL_LOOPING_CONST_OR_PURE_P (node->decl) = ((size_t)data & 2) != 0;
|
|
return false;
|
|
}
|
|
|
|
/* Set DECL_PURE_P on NODE's decl and on aliases of NODE
|
|
if any to PURE. */
|
|
|
|
void
|
|
cgraph_set_pure_flag (struct cgraph_node *node, bool pure, bool looping)
|
|
{
|
|
cgraph_for_node_thunks_and_aliases (node, cgraph_set_pure_flag_1,
|
|
(void *)(size_t)(pure + (int)looping * 2),
|
|
false);
|
|
}
|
|
|
|
/* Return true when NODE can not return or throw and thus
|
|
it is safe to ignore its side effects for IPA analysis. */
|
|
|
|
bool
|
|
cgraph_node_cannot_return (struct cgraph_node *node)
|
|
{
|
|
int flags = flags_from_decl_or_type (node->decl);
|
|
if (!flag_exceptions)
|
|
return (flags & ECF_NORETURN) != 0;
|
|
else
|
|
return ((flags & (ECF_NORETURN | ECF_NOTHROW))
|
|
== (ECF_NORETURN | ECF_NOTHROW));
|
|
}
|
|
|
|
/* Return true when call of E can not lead to return from caller
|
|
and thus it is safe to ignore its side effects for IPA analysis
|
|
when computing side effects of the caller.
|
|
FIXME: We could actually mark all edges that have no reaching
|
|
patch to the exit block or throw to get better results. */
|
|
bool
|
|
cgraph_edge_cannot_lead_to_return (struct cgraph_edge *e)
|
|
{
|
|
if (cgraph_node_cannot_return (e->caller))
|
|
return true;
|
|
if (e->indirect_unknown_callee)
|
|
{
|
|
int flags = e->indirect_info->ecf_flags;
|
|
if (!flag_exceptions)
|
|
return (flags & ECF_NORETURN) != 0;
|
|
else
|
|
return ((flags & (ECF_NORETURN | ECF_NOTHROW))
|
|
== (ECF_NORETURN | ECF_NOTHROW));
|
|
}
|
|
else
|
|
return cgraph_node_cannot_return (e->callee);
|
|
}
|
|
|
|
/* Return true when function NODE can be removed from callgraph
|
|
if all direct calls are eliminated. */
|
|
|
|
bool
|
|
cgraph_can_remove_if_no_direct_calls_and_refs_p (struct cgraph_node *node)
|
|
{
|
|
gcc_assert (!node->global.inlined_to);
|
|
/* Extern inlines can always go, we will use the external definition. */
|
|
if (DECL_EXTERNAL (node->decl))
|
|
return true;
|
|
/* When function is needed, we can not remove it. */
|
|
if (node->force_output || node->used_from_other_partition)
|
|
return false;
|
|
if (DECL_STATIC_CONSTRUCTOR (node->decl)
|
|
|| DECL_STATIC_DESTRUCTOR (node->decl))
|
|
return false;
|
|
/* Only COMDAT functions can be removed if externally visible. */
|
|
if (node->externally_visible
|
|
&& (!DECL_COMDAT (node->decl)
|
|
|| node->forced_by_abi
|
|
|| symtab_used_from_object_file_p (node)))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/* Worker for cgraph_can_remove_if_no_direct_calls_p. */
|
|
|
|
static bool
|
|
nonremovable_p (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
|
|
{
|
|
return !cgraph_can_remove_if_no_direct_calls_and_refs_p (node);
|
|
}
|
|
|
|
/* Return true when function NODE and its aliases can be removed from callgraph
|
|
if all direct calls are eliminated. */
|
|
|
|
bool
|
|
cgraph_can_remove_if_no_direct_calls_p (struct cgraph_node *node)
|
|
{
|
|
/* Extern inlines can always go, we will use the external definition. */
|
|
if (DECL_EXTERNAL (node->decl))
|
|
return true;
|
|
if (node->address_taken)
|
|
return false;
|
|
return !cgraph_for_node_and_aliases (node, nonremovable_p, NULL, true);
|
|
}
|
|
|
|
/* Worker for cgraph_can_remove_if_no_direct_calls_p. */
|
|
|
|
static bool
|
|
used_from_object_file_p (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
|
|
{
|
|
return symtab_used_from_object_file_p (node);
|
|
}
|
|
|
|
/* Return true when function NODE can be expected to be removed
|
|
from program when direct calls in this compilation unit are removed.
|
|
|
|
As a special case COMDAT functions are
|
|
cgraph_can_remove_if_no_direct_calls_p while the are not
|
|
cgraph_only_called_directly_p (it is possible they are called from other
|
|
unit)
|
|
|
|
This function behaves as cgraph_only_called_directly_p because eliminating
|
|
all uses of COMDAT function does not make it necessarily disappear from
|
|
the program unless we are compiling whole program or we do LTO. In this
|
|
case we know we win since dynamic linking will not really discard the
|
|
linkonce section. */
|
|
|
|
bool
|
|
cgraph_will_be_removed_from_program_if_no_direct_calls (struct cgraph_node *node)
|
|
{
|
|
gcc_assert (!node->global.inlined_to);
|
|
if (cgraph_for_node_and_aliases (node, used_from_object_file_p, NULL, true))
|
|
return false;
|
|
if (!in_lto_p && !flag_whole_program)
|
|
return cgraph_only_called_directly_p (node);
|
|
else
|
|
{
|
|
if (DECL_EXTERNAL (node->decl))
|
|
return true;
|
|
return cgraph_can_remove_if_no_direct_calls_p (node);
|
|
}
|
|
}
|
|
|
|
|
|
/* Worker for cgraph_only_called_directly_p. */
|
|
|
|
static bool
|
|
cgraph_not_only_called_directly_p_1 (struct cgraph_node *node, void *data ATTRIBUTE_UNUSED)
|
|
{
|
|
return !cgraph_only_called_directly_or_aliased_p (node);
|
|
}
|
|
|
|
/* Return true when function NODE and all its aliases are only called
|
|
directly.
|
|
i.e. it is not externally visible, address was not taken and
|
|
it is not used in any other non-standard way. */
|
|
|
|
bool
|
|
cgraph_only_called_directly_p (struct cgraph_node *node)
|
|
{
|
|
gcc_assert (cgraph_function_or_thunk_node (node, NULL) == node);
|
|
return !cgraph_for_node_and_aliases (node, cgraph_not_only_called_directly_p_1,
|
|
NULL, true);
|
|
}
|
|
|
|
|
|
/* Collect all callers of NODE. Worker for collect_callers_of_node. */
|
|
|
|
static bool
|
|
collect_callers_of_node_1 (struct cgraph_node *node, void *data)
|
|
{
|
|
vec<cgraph_edge_p> *redirect_callers = (vec<cgraph_edge_p> *)data;
|
|
struct cgraph_edge *cs;
|
|
enum availability avail;
|
|
cgraph_function_or_thunk_node (node, &avail);
|
|
|
|
if (avail > AVAIL_OVERWRITABLE)
|
|
for (cs = node->callers; cs != NULL; cs = cs->next_caller)
|
|
if (!cs->indirect_inlining_edge)
|
|
redirect_callers->safe_push (cs);
|
|
return false;
|
|
}
|
|
|
|
/* Collect all callers of NODE and its aliases that are known to lead to NODE
|
|
(i.e. are not overwritable). */
|
|
|
|
vec<cgraph_edge_p>
|
|
collect_callers_of_node (struct cgraph_node *node)
|
|
{
|
|
vec<cgraph_edge_p> redirect_callers = vNULL;
|
|
cgraph_for_node_and_aliases (node, collect_callers_of_node_1,
|
|
&redirect_callers, false);
|
|
return redirect_callers;
|
|
}
|
|
|
|
/* Return TRUE if NODE2 a clone of NODE or is equivalent to it. */
|
|
|
|
static bool
|
|
clone_of_p (struct cgraph_node *node, struct cgraph_node *node2)
|
|
{
|
|
bool skipped_thunk = false;
|
|
node = cgraph_function_or_thunk_node (node, NULL);
|
|
node2 = cgraph_function_or_thunk_node (node2, NULL);
|
|
|
|
/* There are no virtual clones of thunks so check former_clone_of or if we
|
|
might have skipped thunks because this adjustments are no longer
|
|
necessary. */
|
|
while (node->thunk.thunk_p)
|
|
{
|
|
if (node2->former_clone_of == node->decl)
|
|
return true;
|
|
if (!node->thunk.this_adjusting)
|
|
return false;
|
|
node = cgraph_function_or_thunk_node (node->callees->callee, NULL);
|
|
skipped_thunk = true;
|
|
}
|
|
|
|
if (skipped_thunk)
|
|
{
|
|
if (!node2->clone.args_to_skip
|
|
|| !bitmap_bit_p (node2->clone.args_to_skip, 0))
|
|
return false;
|
|
if (node2->former_clone_of == node->decl)
|
|
return true;
|
|
else if (!node2->clone_of)
|
|
return false;
|
|
}
|
|
|
|
while (node != node2 && node2)
|
|
node2 = node2->clone_of;
|
|
return node2 != NULL;
|
|
}
|
|
|
|
/* Verify edge E count and frequency. */
|
|
|
|
static bool
|
|
verify_edge_count_and_frequency (struct cgraph_edge *e)
|
|
{
|
|
bool error_found = false;
|
|
if (e->count < 0)
|
|
{
|
|
error ("caller edge count is negative");
|
|
error_found = true;
|
|
}
|
|
if (e->frequency < 0)
|
|
{
|
|
error ("caller edge frequency is negative");
|
|
error_found = true;
|
|
}
|
|
if (e->frequency > CGRAPH_FREQ_MAX)
|
|
{
|
|
error ("caller edge frequency is too large");
|
|
error_found = true;
|
|
}
|
|
if (gimple_has_body_p (e->caller->decl)
|
|
&& !e->caller->global.inlined_to
|
|
&& !e->speculative
|
|
/* FIXME: Inline-analysis sets frequency to 0 when edge is optimized out.
|
|
Remove this once edges are actually removed from the function at that time. */
|
|
&& (e->frequency
|
|
|| (inline_edge_summary_vec.exists ()
|
|
&& ((inline_edge_summary_vec.length () <= (unsigned) e->uid)
|
|
|| !inline_edge_summary (e)->predicate)))
|
|
&& (e->frequency
|
|
!= compute_call_stmt_bb_frequency (e->caller->decl,
|
|
gimple_bb (e->call_stmt))))
|
|
{
|
|
error ("caller edge frequency %i does not match BB frequency %i",
|
|
e->frequency,
|
|
compute_call_stmt_bb_frequency (e->caller->decl,
|
|
gimple_bb (e->call_stmt)));
|
|
error_found = true;
|
|
}
|
|
return error_found;
|
|
}
|
|
|
|
/* Switch to THIS_CFUN if needed and print STMT to stderr. */
|
|
static void
|
|
cgraph_debug_gimple_stmt (struct function *this_cfun, gimple stmt)
|
|
{
|
|
bool fndecl_was_null = false;
|
|
/* debug_gimple_stmt needs correct cfun */
|
|
if (cfun != this_cfun)
|
|
set_cfun (this_cfun);
|
|
/* ...and an actual current_function_decl */
|
|
if (!current_function_decl)
|
|
{
|
|
current_function_decl = this_cfun->decl;
|
|
fndecl_was_null = true;
|
|
}
|
|
debug_gimple_stmt (stmt);
|
|
if (fndecl_was_null)
|
|
current_function_decl = NULL;
|
|
}
|
|
|
|
/* Verify that call graph edge E corresponds to DECL from the associated
|
|
statement. Return true if the verification should fail. */
|
|
|
|
static bool
|
|
verify_edge_corresponds_to_fndecl (struct cgraph_edge *e, tree decl)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
if (!decl || e->callee->global.inlined_to)
|
|
return false;
|
|
if (cgraph_state == CGRAPH_LTO_STREAMING)
|
|
return false;
|
|
node = cgraph_get_node (decl);
|
|
|
|
/* We do not know if a node from a different partition is an alias or what it
|
|
aliases and therefore cannot do the former_clone_of check reliably. When
|
|
body_removed is set, we have lost all information about what was alias or
|
|
thunk of and also cannot proceed. */
|
|
if (!node
|
|
|| node->body_removed
|
|
|| node->in_other_partition
|
|
|| e->callee->in_other_partition)
|
|
return false;
|
|
|
|
/* Optimizers can redirect unreachable calls or calls triggering undefined
|
|
behaviour to builtin_unreachable. */
|
|
if (DECL_BUILT_IN_CLASS (e->callee->decl) == BUILT_IN_NORMAL
|
|
&& DECL_FUNCTION_CODE (e->callee->decl) == BUILT_IN_UNREACHABLE)
|
|
return false;
|
|
node = cgraph_function_or_thunk_node (node, NULL);
|
|
|
|
if (e->callee->former_clone_of != node->decl
|
|
&& (node != cgraph_function_or_thunk_node (e->callee, NULL))
|
|
&& !clone_of_p (node, e->callee))
|
|
return true;
|
|
else
|
|
return false;
|
|
}
|
|
|
|
/* Verify cgraph nodes of given cgraph node. */
|
|
DEBUG_FUNCTION void
|
|
verify_cgraph_node (struct cgraph_node *node)
|
|
{
|
|
struct cgraph_edge *e;
|
|
struct function *this_cfun = DECL_STRUCT_FUNCTION (node->decl);
|
|
basic_block this_block;
|
|
gimple_stmt_iterator gsi;
|
|
bool error_found = false;
|
|
|
|
if (seen_error ())
|
|
return;
|
|
|
|
timevar_push (TV_CGRAPH_VERIFY);
|
|
error_found |= verify_symtab_base (node);
|
|
for (e = node->callees; e; e = e->next_callee)
|
|
if (e->aux)
|
|
{
|
|
error ("aux field set for edge %s->%s",
|
|
identifier_to_locale (e->caller->name ()),
|
|
identifier_to_locale (e->callee->name ()));
|
|
error_found = true;
|
|
}
|
|
if (node->count < 0)
|
|
{
|
|
error ("execution count is negative");
|
|
error_found = true;
|
|
}
|
|
if (node->global.inlined_to && node->same_comdat_group)
|
|
{
|
|
error ("inline clone in same comdat group list");
|
|
error_found = true;
|
|
}
|
|
if (!node->definition && !node->in_other_partition && node->local.local)
|
|
{
|
|
error ("local symbols must be defined");
|
|
error_found = true;
|
|
}
|
|
if (node->global.inlined_to && node->externally_visible)
|
|
{
|
|
error ("externally visible inline clone");
|
|
error_found = true;
|
|
}
|
|
if (node->global.inlined_to && node->address_taken)
|
|
{
|
|
error ("inline clone with address taken");
|
|
error_found = true;
|
|
}
|
|
if (node->global.inlined_to && node->force_output)
|
|
{
|
|
error ("inline clone is forced to output");
|
|
error_found = true;
|
|
}
|
|
for (e = node->indirect_calls; e; e = e->next_callee)
|
|
{
|
|
if (e->aux)
|
|
{
|
|
error ("aux field set for indirect edge from %s",
|
|
identifier_to_locale (e->caller->name ()));
|
|
error_found = true;
|
|
}
|
|
if (!e->indirect_unknown_callee
|
|
|| !e->indirect_info)
|
|
{
|
|
error ("An indirect edge from %s is not marked as indirect or has "
|
|
"associated indirect_info, the corresponding statement is: ",
|
|
identifier_to_locale (e->caller->name ()));
|
|
cgraph_debug_gimple_stmt (this_cfun, e->call_stmt);
|
|
error_found = true;
|
|
}
|
|
}
|
|
bool check_comdat = symtab_comdat_local_p (node);
|
|
for (e = node->callers; e; e = e->next_caller)
|
|
{
|
|
if (verify_edge_count_and_frequency (e))
|
|
error_found = true;
|
|
if (check_comdat
|
|
&& !symtab_in_same_comdat_p (e->caller, node))
|
|
{
|
|
error ("comdat-local function called by %s outside its comdat",
|
|
identifier_to_locale (e->caller->name ()));
|
|
error_found = true;
|
|
}
|
|
if (!e->inline_failed)
|
|
{
|
|
if (node->global.inlined_to
|
|
!= (e->caller->global.inlined_to
|
|
? e->caller->global.inlined_to : e->caller))
|
|
{
|
|
error ("inlined_to pointer is wrong");
|
|
error_found = true;
|
|
}
|
|
if (node->callers->next_caller)
|
|
{
|
|
error ("multiple inline callers");
|
|
error_found = true;
|
|
}
|
|
}
|
|
else
|
|
if (node->global.inlined_to)
|
|
{
|
|
error ("inlined_to pointer set for noninline callers");
|
|
error_found = true;
|
|
}
|
|
}
|
|
for (e = node->indirect_calls; e; e = e->next_callee)
|
|
if (verify_edge_count_and_frequency (e))
|
|
error_found = true;
|
|
if (!node->callers && node->global.inlined_to)
|
|
{
|
|
error ("inlined_to pointer is set but no predecessors found");
|
|
error_found = true;
|
|
}
|
|
if (node->global.inlined_to == node)
|
|
{
|
|
error ("inlined_to pointer refers to itself");
|
|
error_found = true;
|
|
}
|
|
|
|
if (node->clone_of)
|
|
{
|
|
struct cgraph_node *n;
|
|
for (n = node->clone_of->clones; n; n = n->next_sibling_clone)
|
|
if (n == node)
|
|
break;
|
|
if (!n)
|
|
{
|
|
error ("node has wrong clone_of");
|
|
error_found = true;
|
|
}
|
|
}
|
|
if (node->clones)
|
|
{
|
|
struct cgraph_node *n;
|
|
for (n = node->clones; n; n = n->next_sibling_clone)
|
|
if (n->clone_of != node)
|
|
break;
|
|
if (n)
|
|
{
|
|
error ("node has wrong clone list");
|
|
error_found = true;
|
|
}
|
|
}
|
|
if ((node->prev_sibling_clone || node->next_sibling_clone) && !node->clone_of)
|
|
{
|
|
error ("node is in clone list but it is not clone");
|
|
error_found = true;
|
|
}
|
|
if (!node->prev_sibling_clone && node->clone_of && node->clone_of->clones != node)
|
|
{
|
|
error ("node has wrong prev_clone pointer");
|
|
error_found = true;
|
|
}
|
|
if (node->prev_sibling_clone && node->prev_sibling_clone->next_sibling_clone != node)
|
|
{
|
|
error ("double linked list of clones corrupted");
|
|
error_found = true;
|
|
}
|
|
|
|
if (node->analyzed && node->alias)
|
|
{
|
|
bool ref_found = false;
|
|
int i;
|
|
struct ipa_ref *ref;
|
|
|
|
if (node->callees)
|
|
{
|
|
error ("Alias has call edges");
|
|
error_found = true;
|
|
}
|
|
for (i = 0; ipa_ref_list_reference_iterate (&node->ref_list,
|
|
i, ref); i++)
|
|
if (ref->use != IPA_REF_ALIAS)
|
|
{
|
|
error ("Alias has non-alias reference");
|
|
error_found = true;
|
|
}
|
|
else if (ref_found)
|
|
{
|
|
error ("Alias has more than one alias reference");
|
|
error_found = true;
|
|
}
|
|
else
|
|
ref_found = true;
|
|
if (!ref_found)
|
|
{
|
|
error ("Analyzed alias has no reference");
|
|
error_found = true;
|
|
}
|
|
}
|
|
if (node->analyzed && node->thunk.thunk_p)
|
|
{
|
|
if (!node->callees)
|
|
{
|
|
error ("No edge out of thunk node");
|
|
error_found = true;
|
|
}
|
|
else if (node->callees->next_callee)
|
|
{
|
|
error ("More than one edge out of thunk node");
|
|
error_found = true;
|
|
}
|
|
if (gimple_has_body_p (node->decl))
|
|
{
|
|
error ("Thunk is not supposed to have body");
|
|
error_found = true;
|
|
}
|
|
}
|
|
else if (node->analyzed && gimple_has_body_p (node->decl)
|
|
&& !TREE_ASM_WRITTEN (node->decl)
|
|
&& (!DECL_EXTERNAL (node->decl) || node->global.inlined_to)
|
|
&& !flag_wpa)
|
|
{
|
|
if (this_cfun->cfg)
|
|
{
|
|
pointer_set_t *stmts = pointer_set_create ();
|
|
int i;
|
|
struct ipa_ref *ref;
|
|
|
|
/* Reach the trees by walking over the CFG, and note the
|
|
enclosing basic-blocks in the call edges. */
|
|
FOR_EACH_BB_FN (this_block, this_cfun)
|
|
{
|
|
for (gsi = gsi_start_phis (this_block);
|
|
!gsi_end_p (gsi); gsi_next (&gsi))
|
|
pointer_set_insert (stmts, gsi_stmt (gsi));
|
|
for (gsi = gsi_start_bb (this_block);
|
|
!gsi_end_p (gsi);
|
|
gsi_next (&gsi))
|
|
{
|
|
gimple stmt = gsi_stmt (gsi);
|
|
pointer_set_insert (stmts, stmt);
|
|
if (is_gimple_call (stmt))
|
|
{
|
|
struct cgraph_edge *e = cgraph_edge (node, stmt);
|
|
tree decl = gimple_call_fndecl (stmt);
|
|
if (e)
|
|
{
|
|
if (e->aux)
|
|
{
|
|
error ("shared call_stmt:");
|
|
cgraph_debug_gimple_stmt (this_cfun, stmt);
|
|
error_found = true;
|
|
}
|
|
if (!e->indirect_unknown_callee)
|
|
{
|
|
if (verify_edge_corresponds_to_fndecl (e, decl))
|
|
{
|
|
error ("edge points to wrong declaration:");
|
|
debug_tree (e->callee->decl);
|
|
fprintf (stderr," Instead of:");
|
|
debug_tree (decl);
|
|
error_found = true;
|
|
}
|
|
}
|
|
else if (decl)
|
|
{
|
|
error ("an indirect edge with unknown callee "
|
|
"corresponding to a call_stmt with "
|
|
"a known declaration:");
|
|
error_found = true;
|
|
cgraph_debug_gimple_stmt (this_cfun, e->call_stmt);
|
|
}
|
|
e->aux = (void *)1;
|
|
}
|
|
else if (decl)
|
|
{
|
|
error ("missing callgraph edge for call stmt:");
|
|
cgraph_debug_gimple_stmt (this_cfun, stmt);
|
|
error_found = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
for (i = 0;
|
|
ipa_ref_list_reference_iterate (&node->ref_list, i, ref);
|
|
i++)
|
|
if (ref->stmt && !pointer_set_contains (stmts, ref->stmt))
|
|
{
|
|
error ("reference to dead statement");
|
|
cgraph_debug_gimple_stmt (this_cfun, ref->stmt);
|
|
error_found = true;
|
|
}
|
|
pointer_set_destroy (stmts);
|
|
}
|
|
else
|
|
/* No CFG available?! */
|
|
gcc_unreachable ();
|
|
|
|
for (e = node->callees; e; e = e->next_callee)
|
|
{
|
|
if (!e->aux)
|
|
{
|
|
error ("edge %s->%s has no corresponding call_stmt",
|
|
identifier_to_locale (e->caller->name ()),
|
|
identifier_to_locale (e->callee->name ()));
|
|
cgraph_debug_gimple_stmt (this_cfun, e->call_stmt);
|
|
error_found = true;
|
|
}
|
|
e->aux = 0;
|
|
}
|
|
for (e = node->indirect_calls; e; e = e->next_callee)
|
|
{
|
|
if (!e->aux && !e->speculative)
|
|
{
|
|
error ("an indirect edge from %s has no corresponding call_stmt",
|
|
identifier_to_locale (e->caller->name ()));
|
|
cgraph_debug_gimple_stmt (this_cfun, e->call_stmt);
|
|
error_found = true;
|
|
}
|
|
e->aux = 0;
|
|
}
|
|
}
|
|
if (error_found)
|
|
{
|
|
dump_cgraph_node (stderr, node);
|
|
internal_error ("verify_cgraph_node failed");
|
|
}
|
|
timevar_pop (TV_CGRAPH_VERIFY);
|
|
}
|
|
|
|
/* Verify whole cgraph structure. */
|
|
DEBUG_FUNCTION void
|
|
verify_cgraph (void)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
if (seen_error ())
|
|
return;
|
|
|
|
FOR_EACH_FUNCTION (node)
|
|
verify_cgraph_node (node);
|
|
}
|
|
|
|
/* Given NODE, walk the alias chain to return the function NODE is alias of.
|
|
Walk through thunk, too.
|
|
When AVAILABILITY is non-NULL, get minimal availability in the chain. */
|
|
|
|
struct cgraph_node *
|
|
cgraph_function_node (struct cgraph_node *node, enum availability *availability)
|
|
{
|
|
do
|
|
{
|
|
node = cgraph_function_or_thunk_node (node, availability);
|
|
if (node->thunk.thunk_p)
|
|
{
|
|
node = node->callees->callee;
|
|
if (availability)
|
|
{
|
|
enum availability a;
|
|
a = cgraph_function_body_availability (node);
|
|
if (a < *availability)
|
|
*availability = a;
|
|
}
|
|
node = cgraph_function_or_thunk_node (node, availability);
|
|
}
|
|
} while (node && node->thunk.thunk_p);
|
|
return node;
|
|
}
|
|
|
|
/* When doing LTO, read NODE's body from disk if it is not already present. */
|
|
|
|
bool
|
|
cgraph_get_body (struct cgraph_node *node)
|
|
{
|
|
struct lto_file_decl_data *file_data;
|
|
const char *data, *name;
|
|
size_t len;
|
|
tree decl = node->decl;
|
|
|
|
if (DECL_RESULT (decl))
|
|
return false;
|
|
|
|
gcc_assert (in_lto_p);
|
|
|
|
file_data = node->lto_file_data;
|
|
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
|
|
/* We may have renamed the declaration, e.g., a static function. */
|
|
name = lto_get_decl_name_mapping (file_data, name);
|
|
|
|
data = lto_get_section_data (file_data, LTO_section_function_body,
|
|
name, &len);
|
|
if (!data)
|
|
{
|
|
dump_cgraph_node (stderr, node);
|
|
fatal_error ("%s: section %s is missing",
|
|
file_data->file_name,
|
|
name);
|
|
}
|
|
|
|
gcc_assert (DECL_STRUCT_FUNCTION (decl) == NULL);
|
|
|
|
lto_input_function_body (file_data, node, data);
|
|
lto_stats.num_function_bodies++;
|
|
lto_free_section_data (file_data, LTO_section_function_body, name,
|
|
data, len);
|
|
lto_free_function_in_decl_state_for_node (node);
|
|
return true;
|
|
}
|
|
|
|
/* Verify if the type of the argument matches that of the function
|
|
declaration. If we cannot verify this or there is a mismatch,
|
|
return false. */
|
|
|
|
static bool
|
|
gimple_check_call_args (gimple stmt, tree fndecl, bool args_count_match)
|
|
{
|
|
tree parms, p;
|
|
unsigned int i, nargs;
|
|
|
|
/* Calls to internal functions always match their signature. */
|
|
if (gimple_call_internal_p (stmt))
|
|
return true;
|
|
|
|
nargs = gimple_call_num_args (stmt);
|
|
|
|
/* Get argument types for verification. */
|
|
if (fndecl)
|
|
parms = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
|
|
else
|
|
parms = TYPE_ARG_TYPES (gimple_call_fntype (stmt));
|
|
|
|
/* Verify if the type of the argument matches that of the function
|
|
declaration. If we cannot verify this or there is a mismatch,
|
|
return false. */
|
|
if (fndecl && DECL_ARGUMENTS (fndecl))
|
|
{
|
|
for (i = 0, p = DECL_ARGUMENTS (fndecl);
|
|
i < nargs;
|
|
i++, p = DECL_CHAIN (p))
|
|
{
|
|
tree arg;
|
|
/* We cannot distinguish a varargs function from the case
|
|
of excess parameters, still deferring the inlining decision
|
|
to the callee is possible. */
|
|
if (!p)
|
|
break;
|
|
arg = gimple_call_arg (stmt, i);
|
|
if (p == error_mark_node
|
|
|| DECL_ARG_TYPE (p) == error_mark_node
|
|
|| arg == error_mark_node
|
|
|| (!types_compatible_p (DECL_ARG_TYPE (p), TREE_TYPE (arg))
|
|
&& !fold_convertible_p (DECL_ARG_TYPE (p), arg)))
|
|
return false;
|
|
}
|
|
if (args_count_match && p)
|
|
return false;
|
|
}
|
|
else if (parms)
|
|
{
|
|
for (i = 0, p = parms; i < nargs; i++, p = TREE_CHAIN (p))
|
|
{
|
|
tree arg;
|
|
/* If this is a varargs function defer inlining decision
|
|
to callee. */
|
|
if (!p)
|
|
break;
|
|
arg = gimple_call_arg (stmt, i);
|
|
if (TREE_VALUE (p) == error_mark_node
|
|
|| arg == error_mark_node
|
|
|| TREE_CODE (TREE_VALUE (p)) == VOID_TYPE
|
|
|| (!types_compatible_p (TREE_VALUE (p), TREE_TYPE (arg))
|
|
&& !fold_convertible_p (TREE_VALUE (p), arg)))
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (nargs != 0)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/* Verify if the type of the argument and lhs of CALL_STMT matches
|
|
that of the function declaration CALLEE. If ARGS_COUNT_MATCH is
|
|
true, the arg count needs to be the same.
|
|
If we cannot verify this or there is a mismatch, return false. */
|
|
|
|
bool
|
|
gimple_check_call_matching_types (gimple call_stmt, tree callee,
|
|
bool args_count_match)
|
|
{
|
|
tree lhs;
|
|
|
|
if ((DECL_RESULT (callee)
|
|
&& !DECL_BY_REFERENCE (DECL_RESULT (callee))
|
|
&& (lhs = gimple_call_lhs (call_stmt)) != NULL_TREE
|
|
&& !useless_type_conversion_p (TREE_TYPE (DECL_RESULT (callee)),
|
|
TREE_TYPE (lhs))
|
|
&& !fold_convertible_p (TREE_TYPE (DECL_RESULT (callee)), lhs))
|
|
|| !gimple_check_call_args (call_stmt, callee, args_count_match))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
#include "gt-cgraph.h"
|