tree-ssa-operands.c (add_virtual_operand): Only mark stores as has_volatile_ops…

tree-ssa-operands.c (add_virtual_operand): Only mark stores as has_volatile_ops if alias information is not available.

2007-09-09  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-operands.c (add_virtual_operand): Only mark
	stores as has_volatile_ops if alias information is not available.

	* gcc.c-torture/compile/20070906-1.c: New testcase.

From-SVN: r128300

gcc/ChangeLog

+2007-09-09  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-operands.c (add_virtual_operand): Only mark
+	stores as has_volatile_ops if alias information is not available.
+
 2007-09-09  Revital Eres  <eres@il.ibm.com>
 
 	* doc/contrib.texi: Add myself.

gcc/testsuite/ChangeLog

+2007-09-09  Richard Guenther  <rguenther@suse.de>
+
+	* gcc.c-torture/compile/20070906-1.c: New testcase.
+
 2007-09-09  Ira Rosen  <irar@il.ibm.com>
 
 	* gcc.dg/vect/costmodel/ppc/costmodel-vect-outer-fir.c: Add

gcc/testsuite/gcc.c-torture/compile/20070906-1.c

+struct Bar {
+  int i[8];
+};
+struct Bar foo(struct Bar **p)
+{
+  return foo((struct Bar**)*p);
+}
+

gcc/tree-ssa-operands.c

@@ -1511,7 +1511,8 @@ add_virtual_operand (tree var, stmt_ann_t s_ann, int flags,
 
   if (aliases == NULL)
     {
-      if (!gimple_aliases_computed_p (cfun))
+      if (!gimple_aliases_computed_p (cfun)
+	  && (flags & opf_def))
         s_ann->has_volatile_ops = true;
 
       /* The variable is not aliased or it is an alias tag.  */