re PR tree-optimization/32575 (With -ftree-vrp miscompiles a single line of code in SQLite)

	PR tree-optimization/32575
	* gcc.c-torture/execute/20071108-1.c: New test.

From-SVN: r129998

gcc/testsuite/ChangeLog

+2007-11-08  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/32575
+	* gcc.c-torture/execute/20071108-1.c: New test.
+
 2007-11-08  Daniel Jacobowitz  <dan@codesourcery.com>
 
 	* g++.dg/opt/anchor1.C: New.

gcc/testsuite/gcc.c-torture/execute/20071108-1.c

+/* PR tree-optimization/32575 */
+
+extern void abort (void);
+
+struct S
+{
+  void *s1, *s2;
+  unsigned char s3, s4, s5;
+};
+
+__attribute__ ((noinline))
+void *
+foo (void)
+{
+  static struct S s;
+  return &s;
+}
+
+__attribute__ ((noinline))
+void *
+bar ()
+{
+  return (void *) 0;
+}
+
+__attribute__ ((noinline))
+struct S *
+test (void *a, void *b)
+{
+  struct S *p, q;
+  p = foo ();
+  if (p == 0)
+    {
+      p = &q;
+      __builtin_memset (p, 0, sizeof (*p));
+    }
+  p->s1 = a;
+  p->s2 = b;
+  if (p == &q)
+    p = 0;
+  return p;
+}
+
+int
+main (void)
+{
+  int a;
+  int b;
+  struct S *z = test ((void *) &a, (void *) &b);
+  if (z == 0 || z->s1 != (void *) &a || z->s2 != (void *) &b || z->s3 || z->s4)
+    abort ();
+  return 0;
+}