re PR tree-optimization/43347 (Warning about symbols generated by SRA being used uninitialized)

2010-03-17  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/43347
	* tree-sra.c (create_access_replacement): Set TREE_NO_WARNING when the
	original base is DECL_ARTIFICIAL or DECL_IGNORED_P.

From-SVN: r157515

gcc/ChangeLog

+2010-03-17  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/43347
+	* tree-sra.c (create_access_replacement): Set TREE_NO_WARNING when the
+	original base is DECL_ARTIFICIAL or DECL_IGNORED_P.
+
 2010-03-17  Bernd Schmidt  <bernd.schmidt@analog.com>
 
 	PR rtl-optimization/42216

gcc/tree-sra.c

@@ -1664,6 +1664,7 @@ create_access_replacement (struct access *access)
 
   DECL_SOURCE_LOCATION (repl) = DECL_SOURCE_LOCATION (access->base);
   DECL_ARTIFICIAL (repl) = 1;
+  DECL_IGNORED_P (repl) = DECL_IGNORED_P (access->base);
 
   if (DECL_NAME (access->base)
       && !DECL_IGNORED_P (access->base)
@@ -1676,11 +1677,10 @@ create_access_replacement (struct access *access)
 
       SET_DECL_DEBUG_EXPR (repl, access->expr);
       DECL_DEBUG_EXPR_IS_FROM (repl) = 1;
-      DECL_IGNORED_P (repl) = 0;
+      TREE_NO_WARNING (repl) = TREE_NO_WARNING (access->base);
     }
-
-  DECL_IGNORED_P (repl) = DECL_IGNORED_P (access->base);
-  TREE_NO_WARNING (repl) = TREE_NO_WARNING (access->base);
+  else
+    TREE_NO_WARNING (repl) = 1;
 
   if (dump_file)
     {