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646 lines
16 KiB
C
646 lines
16 KiB
C
/* Interprocedural analyses.
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Copyright (C) 2005 Free Software Foundation, Inc.
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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 2, 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 COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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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 "tree.h"
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#include "langhooks.h"
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#include "ggc.h"
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#include "target.h"
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#include "cgraph.h"
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#include "ipa-prop.h"
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#include "tree-flow.h"
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#include "tree-pass.h"
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#include "flags.h"
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#include "timevar.h"
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/* This file contains interfaces that can be used for various IPA
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optimizations:
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- ipa_methodlist interface - It is used to create and handle a temporary
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worklist used in the propagation stage of IPCP. (can be used for more
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IPA optimizations).
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- ipa_callsite interface - for each callsite this interface creates and
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handles ipa_edge structure associated with it.
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- ipa_method interface - for each method this interface creates and
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handles ipa_node structure associated with it. */
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/* ipa_methodlist interface. */
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/* Create a new worklist node. */
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static inline ipa_methodlist_p
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ipa_create_methodlist_node (void)
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{
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return (ipa_methodlist_p) xcalloc (1, sizeof (struct ipa_methodlist));
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}
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/* Return true if worklist WL is empty. */
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bool
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ipa_methodlist_not_empty (ipa_methodlist_p wl)
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{
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return (wl != NULL);
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}
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/* Return the method in worklist element WL. */
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static inline struct cgraph_node *
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ipa_methodlist_method (ipa_methodlist_p wl)
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{
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return wl->method_p;
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}
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/* Make worklist element WL point to method MT in the callgraph. */
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static inline void
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ipa_methodlist_method_set (ipa_methodlist_p wl, struct cgraph_node *mt)
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{
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wl->method_p = mt;
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}
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/* Return the next element in the worklist following worklist
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element WL. */
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static inline ipa_methodlist_p
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ipa_methodlist_next_method (ipa_methodlist_p wl)
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{
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return wl->next_method;
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}
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/* Set worklist element WL1 to point to worklist element WL2. */
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static inline void
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ipa_methodlist_next_method_set (ipa_methodlist_p wl1, ipa_methodlist_p wl2)
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{
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wl1->next_method = wl2;
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}
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/* Initialize worklist to contain all methods. */
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ipa_methodlist_p
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ipa_methodlist_init (void)
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{
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struct cgraph_node *node;
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ipa_methodlist_p wl;
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wl = NULL;
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for (node = cgraph_nodes; node; node = node->next)
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ipa_add_method (&wl, node);
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return wl;
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}
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/* Add method MT to the worklist. Set worklist element WL
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to point to MT. */
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void
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ipa_add_method (ipa_methodlist_p * wl, struct cgraph_node *mt)
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{
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ipa_methodlist_p temp;
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temp = ipa_create_methodlist_node ();
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ipa_methodlist_method_set (temp, mt);
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ipa_methodlist_next_method_set (temp, *wl);
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*wl = temp;
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}
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/* Remove a method from the worklist. WL points to the first
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element in the list, which is removed. */
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struct cgraph_node *
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ipa_remove_method (ipa_methodlist_p * wl)
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{
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ipa_methodlist_p first;
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struct cgraph_node *return_method;
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first = *wl;
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*wl = ipa_methodlist_next_method (*wl);
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return_method = ipa_methodlist_method (first);
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free (first);
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return return_method;
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}
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/* ipa_method interface. */
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/* Return number of formals of method MT. */
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int
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ipa_method_formal_count (struct cgraph_node *mt)
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{
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return IPA_NODE_REF (mt)->ipa_arg_num;
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}
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/* Set number of formals of method MT to I. */
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void
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ipa_method_formal_count_set (struct cgraph_node *mt, int i)
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{
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IPA_NODE_REF (mt)->ipa_arg_num = i;
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}
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/* Return whether I-th formal of MT is modified in MT. */
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static inline bool
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ipa_method_is_modified (struct cgraph_node *mt, int i)
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{
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return IPA_NODE_REF (mt)->ipa_mod[i];
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}
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/* Return the tree of I-th formal of MT. */
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tree
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ipa_method_get_tree (struct cgraph_node *mt, int i)
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{
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return IPA_NODE_REF (mt)->ipa_param_tree[i];
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}
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/* Create tree map structure for MT. */
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static inline void
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ipa_method_tree_map_create (struct cgraph_node *mt)
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{
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IPA_NODE_REF (mt)->ipa_param_tree =
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XCNEWVEC (tree, ipa_method_formal_count (mt));
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}
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/* Create modify structure for MT. */
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static inline void
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ipa_method_modify_create (struct cgraph_node *mt)
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{
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((struct ipa_node *) mt->aux)->ipa_mod =
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XCNEWVEC (bool, ipa_method_formal_count (mt));
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}
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/* Set modify of I-th formal of MT to VAL. */
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static inline void
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ipa_method_modify_set (struct cgraph_node *mt, int i, bool val)
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{
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IPA_NODE_REF (mt)->ipa_mod[i] = val;
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}
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/* Return index of the formal whose tree is PTREE in method MT. */
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static int
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ipa_method_tree_map (struct cgraph_node *mt, tree ptree)
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{
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int i, count;
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count = ipa_method_formal_count (mt);
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for (i = 0; i < count; i++)
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if (IPA_NODE_REF (mt)->ipa_param_tree[i] == ptree)
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return i;
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return -1;
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}
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/* Insert the formal trees to the ipa_param_tree array in method MT. */
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void
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ipa_method_compute_tree_map (struct cgraph_node *mt)
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{
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tree fndecl;
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tree fnargs;
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tree parm;
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int param_num;
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ipa_method_tree_map_create (mt);
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fndecl = mt->decl;
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fnargs = DECL_ARGUMENTS (fndecl);
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param_num = 0;
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for (parm = fnargs; parm; parm = TREE_CHAIN (parm))
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{
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IPA_NODE_REF (mt)->ipa_param_tree[param_num] = parm;
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param_num++;
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}
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}
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/* Count number of formals in MT. Insert the result to the
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ipa_node. */
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void
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ipa_method_formal_compute_count (struct cgraph_node *mt)
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{
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tree fndecl;
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tree fnargs;
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tree parm;
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int param_num;
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fndecl = mt->decl;
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fnargs = DECL_ARGUMENTS (fndecl);
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param_num = 0;
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for (parm = fnargs; parm; parm = TREE_CHAIN (parm))
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param_num++;
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ipa_method_formal_count_set (mt, param_num);
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}
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/* Check STMT to detect whether a formal is modified within MT,
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the appropriate entry is updated in the ipa_mod array of ipa_node
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(associated with MT). */
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static void
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ipa_method_modify_stmt (struct cgraph_node *mt, tree stmt)
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{
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int i, j;
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switch (TREE_CODE (stmt))
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{
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case MODIFY_EXPR:
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if (TREE_CODE (TREE_OPERAND (stmt, 0)) == PARM_DECL)
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{
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i = ipa_method_tree_map (mt, TREE_OPERAND (stmt, 0));
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if (i >= 0)
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ipa_method_modify_set (mt, i, true);
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}
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break;
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case ASM_EXPR:
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/* Asm code could modify any of the parameters. */
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for (j = 0; j < ipa_method_formal_count (mt); j++)
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ipa_method_modify_set (mt, j, true);
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break;
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default:
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break;
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}
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}
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/* Initialize ipa_mod array of MT. */
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static void
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ipa_method_modify_init (struct cgraph_node *mt)
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{
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int i, count;
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ipa_method_modify_create (mt);
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count = ipa_method_formal_count (mt);
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for (i = 0; i < count; i++)
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ipa_method_modify_set (mt, i, false);
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}
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/* The modify computation driver for MT. Compute which formal arguments
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of method MT are locally modified. Formals may be modified in MT
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if their address is taken, or if
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they appear on the left hand side of an assignment. */
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void
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ipa_method_compute_modify (struct cgraph_node *mt)
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{
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tree decl;
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tree body;
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int j, count;
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basic_block bb;
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struct function *func;
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block_stmt_iterator bsi;
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tree stmt, parm_tree;
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ipa_method_modify_init (mt);
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decl = mt->decl;
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count = ipa_method_formal_count (mt);
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/* ??? Handle pending sizes case. Set all parameters
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of the method to be modified. */
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if (DECL_UNINLINABLE (decl))
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{
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for (j = 0; j < count; j++)
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ipa_method_modify_set (mt, j, true);
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return;
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}
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/* Formals whose address is taken are considered modified. */
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for (j = 0; j < count; j++)
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{
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parm_tree = ipa_method_get_tree (mt, j);
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if (TREE_ADDRESSABLE (parm_tree))
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ipa_method_modify_set (mt, j, true);
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}
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body = DECL_SAVED_TREE (decl);
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if (body != NULL)
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{
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func = DECL_STRUCT_FUNCTION (decl);
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FOR_EACH_BB_FN (bb, func)
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{
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for (bsi = bsi_start (bb); !bsi_end_p (bsi); bsi_next (&bsi))
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{
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stmt = bsi_stmt (bsi);
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ipa_method_modify_stmt (mt, stmt);
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}
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}
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}
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}
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/* ipa_callsite interface. */
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/* Return number of arguments in callsite CS. */
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int
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ipa_callsite_param_count (struct cgraph_edge *cs)
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{
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return IPA_EDGE_REF (cs)->ipa_param_num;
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}
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/* Set number of arguments in callsite CS to I. */
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void
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ipa_callsite_param_count_set (struct cgraph_edge *cs, int i)
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{
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IPA_EDGE_REF (cs)->ipa_param_num = i;
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}
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/* Return the jump function (ipa_jump_func struct) for argument I of
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callsite CS. */
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struct ipa_jump_func *
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ipa_callsite_param (struct cgraph_edge *cs, int i)
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{
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return &(IPA_EDGE_REF (cs)->ipa_param_map[i]);
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}
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/* return the callee (cgraph_node) of callsite CS. */
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struct cgraph_node *
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ipa_callsite_callee (struct cgraph_edge *cs)
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{
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return cs->callee;
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}
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/* Set field 'type' of jump function (ipa_jump_func struct) of argument I
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in callsite CS. */
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static inline void
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ipa_callsite_param_set_type (struct cgraph_edge *cs, int i,
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enum jump_func_type type1)
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{
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IPA_EDGE_REF (cs)->ipa_param_map[i].type = type1;
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}
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/* Set FORMAL as 'info_type' field of jump function (ipa_jump_func struct)
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of argument I of callsite CS. */
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static inline void
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ipa_callsite_param_set_info_type_formal (struct cgraph_edge *cs, int i,
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unsigned int formal)
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{
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ipa_callsite_param (cs, i)->info_type.formal_id = formal;
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}
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/* Set int-valued INFO_TYPE1 as 'info_type' field of
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jump function (ipa_jump_func struct) of argument I of callsite CS. */
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static inline void
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ipa_callsite_param_set_info_type (struct cgraph_edge *cs, int i, tree info_type1)
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{
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ipa_callsite_param (cs, i)->info_type.value = info_type1;
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}
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/* Allocate space for callsite CS. */
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static inline void
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ipa_callsite_param_map_create (struct cgraph_edge *cs)
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{
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IPA_EDGE_REF (cs)->ipa_param_map =
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XCNEWVEC (struct ipa_jump_func, ipa_callsite_param_count (cs));
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}
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/* Return the call expr tree related to callsite CS. */
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static inline tree
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ipa_callsite_tree (struct cgraph_edge *cs)
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{
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return cs->call_stmt;
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}
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/* Return the caller (cgraph_node) of CS. */
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static inline struct cgraph_node *
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ipa_callsite_caller (struct cgraph_edge *cs)
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{
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return cs->caller;
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}
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/* Count number of arguments callsite CS has and store it in
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ipa_edge structure corresponding to this callsite. */
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void
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ipa_callsite_compute_count (struct cgraph_edge *cs)
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{
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tree call_tree;
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tree arg;
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int arg_num;
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call_tree = get_call_expr_in (ipa_callsite_tree (cs));
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gcc_assert (TREE_CODE (call_tree) == CALL_EXPR);
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arg = TREE_OPERAND (call_tree, 1);
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arg_num = 0;
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for (; arg != NULL_TREE; arg = TREE_CHAIN (arg))
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arg_num++;
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ipa_callsite_param_count_set (cs, arg_num);
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}
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/* Compute jump function for all arguments of callsite CS
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and insert the information in the ipa_param_map array
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in the ipa_edge corresponding to this callsite. (Explanation
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on jump functions is in ipa-prop.h). */
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void
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ipa_callsite_compute_param (struct cgraph_edge *cs)
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{
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tree call_tree;
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tree arg, cst_decl;
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int arg_num;
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int i;
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struct cgraph_node *mt;
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if (ipa_callsite_param_count (cs) == 0)
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return;
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ipa_callsite_param_map_create (cs);
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call_tree = get_call_expr_in (ipa_callsite_tree (cs));
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gcc_assert (TREE_CODE (call_tree) == CALL_EXPR);
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arg = TREE_OPERAND (call_tree, 1);
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arg_num = 0;
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for (; arg != NULL_TREE; arg = TREE_CHAIN (arg))
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{
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/* If the formal parameter was passed as argument, we store
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FORMAL_IPATYPE and its index in the caller as the jump function
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of this argument. */
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if (TREE_CODE (TREE_VALUE (arg)) == PARM_DECL)
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{
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mt = ipa_callsite_caller (cs);
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i = ipa_method_tree_map (mt, TREE_VALUE (arg));
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if (i < 0 || ipa_method_is_modified (mt, i))
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ipa_callsite_param_set_type (cs, arg_num, UNKNOWN_IPATYPE);
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else
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{
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ipa_callsite_param_set_type (cs, arg_num, FORMAL_IPATYPE);
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ipa_callsite_param_set_info_type_formal (cs, arg_num, i);
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}
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}
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/* If a constant value was passed as argument,
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we store CONST_IPATYPE and its value as the jump function
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of this argument. */
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else if (TREE_CODE (TREE_VALUE (arg)) == INTEGER_CST
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|| TREE_CODE (TREE_VALUE (arg)) == REAL_CST)
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{
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ipa_callsite_param_set_type (cs, arg_num, CONST_IPATYPE);
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ipa_callsite_param_set_info_type (cs, arg_num,
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TREE_VALUE (arg));
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}
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/* This is for the case of Fortran. If the address of a const_decl
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was passed as argument then we store
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CONST_IPATYPE_REF/CONST_IPATYPE_REF and the constant
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value as the jump function corresponding to this argument. */
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else if (TREE_CODE (TREE_VALUE (arg)) == ADDR_EXPR
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&& TREE_CODE (TREE_OPERAND (TREE_VALUE (arg), 0)) ==
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CONST_DECL)
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{
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cst_decl = TREE_OPERAND (TREE_VALUE (arg), 0);
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if (TREE_CODE (DECL_INITIAL (cst_decl)) == INTEGER_CST
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|| TREE_CODE (DECL_INITIAL (cst_decl)) == REAL_CST)
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{
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ipa_callsite_param_set_type (cs, arg_num,
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CONST_IPATYPE_REF);
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ipa_callsite_param_set_info_type (cs, arg_num,
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DECL_INITIAL (cst_decl));
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}
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}
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else
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ipa_callsite_param_set_type (cs, arg_num, UNKNOWN_IPATYPE);
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arg_num++;
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}
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}
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/* Return type of jump function JF. */
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enum jump_func_type
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get_type (struct ipa_jump_func *jf)
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{
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return jf->type;
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}
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/* Return info type of jump function JF. */
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union parameter_info *
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ipa_jf_get_info_type (struct ipa_jump_func *jf)
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{
|
|
return &(jf->info_type);
|
|
}
|
|
|
|
/* Allocate and initialize ipa_node structure.
|
|
cgraph_node NODE points to the new allocated ipa_node. */
|
|
void
|
|
ipa_node_create (struct cgraph_node *node)
|
|
{
|
|
node->aux = xcalloc (1, sizeof (struct ipa_node));
|
|
}
|
|
|
|
/* Allocate and initialize ipa_node structure for all
|
|
nodes in callgraph. */
|
|
void
|
|
ipa_nodes_create (void)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
ipa_node_create (node);
|
|
}
|
|
|
|
/* Allocate and initialize ipa_edge structure. */
|
|
void
|
|
ipa_edges_create (void)
|
|
{
|
|
struct cgraph_node *node;
|
|
struct cgraph_edge *cs;
|
|
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
for (cs = node->callees; cs; cs = cs->next_callee)
|
|
cs->aux = xcalloc (1, sizeof (struct ipa_edge));
|
|
}
|
|
|
|
/* Free ipa_node structure. */
|
|
void
|
|
ipa_nodes_free (void)
|
|
{
|
|
struct cgraph_node *node;
|
|
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
{
|
|
free (node->aux);
|
|
node->aux = NULL;
|
|
}
|
|
}
|
|
|
|
/* Free ipa_edge structure. */
|
|
void
|
|
ipa_edges_free (void)
|
|
{
|
|
struct cgraph_node *node;
|
|
struct cgraph_edge *cs;
|
|
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
for (cs = node->callees; cs; cs = cs->next_callee)
|
|
{
|
|
free (cs->aux);
|
|
cs->aux = NULL;
|
|
}
|
|
}
|
|
|
|
/* Free ipa data structures of ipa_node and ipa_edge. */
|
|
void
|
|
ipa_free (void)
|
|
{
|
|
struct cgraph_node *node;
|
|
struct cgraph_edge *cs;
|
|
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
{
|
|
if (node->aux == NULL)
|
|
continue;
|
|
if (IPA_NODE_REF (node)->ipcp_cval)
|
|
free (IPA_NODE_REF (node)->ipcp_cval);
|
|
if (IPA_NODE_REF (node)->ipa_param_tree)
|
|
free (IPA_NODE_REF (node)->ipa_param_tree);
|
|
if (IPA_NODE_REF (node)->ipa_mod)
|
|
free (IPA_NODE_REF (node)->ipa_mod);
|
|
for (cs = node->callees; cs; cs = cs->next_callee)
|
|
{
|
|
if (cs->aux)
|
|
if (IPA_EDGE_REF (cs)->ipa_param_map)
|
|
free (IPA_EDGE_REF (cs)->ipa_param_map);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Print ipa_tree_map data structures of all methods in the
|
|
callgraph to F. */
|
|
void
|
|
ipa_method_tree_print (FILE * f)
|
|
{
|
|
int i, count;
|
|
tree temp;
|
|
struct cgraph_node *node;
|
|
|
|
fprintf (f, "\nPARAM TREE MAP PRINT\n");
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
{
|
|
fprintf (f, "method %s Trees :: \n", cgraph_node_name (node));
|
|
count = ipa_method_formal_count (node);
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
temp = ipa_method_get_tree (node, i);
|
|
if (TREE_CODE (temp) == PARM_DECL)
|
|
fprintf (f, " param [%d] : %s\n", i,
|
|
(*lang_hooks.decl_printable_name) (temp, 2));
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
/* Print ipa_modify data structures of all methods in the
|
|
callgraph to F. */
|
|
void
|
|
ipa_method_modify_print (FILE * f)
|
|
{
|
|
int i, count;
|
|
bool temp;
|
|
struct cgraph_node *node;
|
|
|
|
fprintf (f, "\nMODIFY PRINT\n");
|
|
for (node = cgraph_nodes; node; node = node->next)
|
|
{
|
|
fprintf (f, "method %s :: \n", cgraph_node_name (node));
|
|
count = ipa_method_formal_count (node);
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
temp = ipa_method_is_modified (node, i);
|
|
if (temp)
|
|
fprintf (f, " param [%d] true \n", i);
|
|
else
|
|
fprintf (f, " param [%d] false \n", i);
|
|
}
|
|
}
|
|
}
|