re PR c++/57208 (Latest chromium compilation fails with enabled LTO)

2013-06-27  Martin Jambor  <mjambor@suse.cz>

	PR lto/57208
	* ipa-ref.h (ipa_maybe_record_reference): Declare.
	* ipa-ref.c (ipa_maybe_record_reference): New function.
	* cgraphclones.c (cgraph_create_virtual_clone): Use it.
	* ipa-cp.c (create_specialized_node): Record potential references from
	aggvals.
	* Makefile.in (ipa-ref.o): Add IPA_REF_H to dependencies.

From-SVN: r200468

1 files changed, 25 insertions, 0 deletions

diff --git a/gcc/ipa-ref.c b/gcc/ipa-ref.c
index 7909805..a6ffdf3 100644
--- a/gcc/ipa-ref.c
+++ b/gcc/ipa-ref.c
@@ -25,6 +25,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "ggc.h"
 #include "target.h"
 #include "cgraph.h"
+#include "ipa-utils.h"
 
 static const char *ipa_ref_use_name[] = {"read","write","addr","alias"};
 
@@ -67,6 +68,30 @@ ipa_record_reference (symtab_node referring_node,
   return ref;
 }
 
+/* If VAL is a reference to a function or a variable, add a reference from
+   REFERRING_NODE to the corresponding symbol table node.  USE_TYPE specify
+   type of the use and STMT the statement (if it exists).  Return the new
+   reference or NULL if none was created.  */
+
+struct ipa_ref *
+ipa_maybe_record_reference (symtab_node referring_node, tree val,
+			    enum ipa_ref_use use_type, gimple stmt)
+{
+  STRIP_NOPS (val);
+  if (TREE_CODE (val) != ADDR_EXPR)
+    return NULL;
+  val = get_base_var (val);
+  if (val && (TREE_CODE (val) == FUNCTION_DECL
+	       || TREE_CODE (val) == VAR_DECL))
+    {
+      symtab_node referred = symtab_get_node (val);
+      gcc_checking_assert (referred);
+      return ipa_record_reference (referring_node, referred,
+				   use_type, stmt);
+    }
+  return NULL;
+}
+
 /* Remove reference REF.  */
 
 void