re PR lto/55848 (internal compiler error: verify_cgraph_node failed (with `-flto' and `-fopenmp'))

2013-01-03  Richard Biener  <rguenther@suse.de>

	PR lto/55848
	* lto-symtab.c (lto_symtab_merge_decls_1): As last resort, always
	prefer a built-in decl.

From-SVN: r194839

gcc/ChangeLog

+2013-01-03  Richard Biener  <rguenther@suse.de>
+
+	PR lto/55848
+	* lto-symtab.c (lto_symtab_merge_decls_1): As last resort, always
+	prefer a built-in decl.
+
 2013-01-03  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.c (process_command): Update copyright notice dates.

gcc/lto-symtab.c

@@ -439,6 +439,16 @@ lto_symtab_merge_decls_1 (symtab_node first)
 		&& COMPLETE_TYPE_P (TREE_TYPE (e->symbol.decl)))
 	      prevailing = e;
 	}
+      /* For variables prefer the builtin if one is available.  */
+      else if (TREE_CODE (prevailing->symbol.decl) == FUNCTION_DECL)
+	{
+	  for (e = first; e; e = e->symbol.next_sharing_asm_name)
+	    if (DECL_BUILT_IN (e->symbol.decl))
+	      {
+		prevailing = e;
+		break;
+	      }
+	}
     }
 
   symtab_prevail_in_asm_name_hash (prevailing);