[PATCH, PR 57084] Create real cgraph node during late intraprocedural devirtualization

[Martin Jambor <mjambor at suse dot cz>]

Hi,

the problem in PR 57084 is that late PRE devirtualization creates a
direct call to a decl fro which we only have an inlined call graph
mode in the given partition.  I tried to find a most universal place
where to fix it because this problem is not special to type-based
devirtualization and in theory can be caused by any call to a decl
that is grabbed from a constructor.  I think the best place is the
following one-liner, because all such decls should go through
canonicalize_constructor_val.

Bootstrapped and tested on x86_64-linux, fixes the testcase (at -m32)
and I have happened to also LTO build Mozilla Firefox with it.  OK for
trunk?

Thanks,

Martin


2013-05-06  Martin Jambor  <mjambor@suse.cz>

	PR lto/57084
	* gimple-fold.c (canonicalize_constructor_val): Call
	cgraph_get_create_real_symbol_node instead of cgraph_get_create_node.

Index: src/gcc/gimple-fold.c
===================================================================
--- src.orig/gcc/gimple-fold.c
+++ src/gcc/gimple-fold.c
@@ -178,7 +178,7 @@ canonicalize_constructor_val (tree cval,
 	  /* Make sure we create a cgraph node for functions we'll reference.
 	     They can be non-existent if the reference comes from an entry
 	     of an external vtable for example.  */
-	  cgraph_get_create_node (base);
+	  cgraph_get_create_real_symbol_node (base);
 	}
       /* Fixup types in global initializers.  */
       if (TREE_TYPE (TREE_TYPE (cval)) != TREE_TYPE (TREE_OPERAND (cval, 0)))