re PR middle-end/50251 (Revision 178353 caused many test failures)

2011-09-14  Tom de Vries  <tom@codesourcery.com>

	PR middle-end/50251
	* gcc.dg/pr50251.c: New test.

From-SVN: r178854

gcc/testsuite/ChangeLog

+2011-09-14  Tom de Vries  <tom@codesourcery.com>
+
+	PR middle-end/50251
+	* gcc.dg/pr50251.c: New test.
+
 2011-09-14  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/34547

gcc/testsuite/gcc.dg/pr50251.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-additional-options "-mpreferred-stack-boundary=12" { target x86_64-*-* } } */
+
+extern void bar (int*);
+
+char *p;
+
+int
+main ()
+{
+  int q;
+  p = __builtin_stack_save ();
+  bar (&q);
+  __builtin_stack_restore (p);
+  bar (&q);
+  return 0;
+}