re PR tree-optimization/45967 (gcc-4.5.x optimizes code with side-effects away)

2011-01-17  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45967
	* gcc.dg/torture/pr45967-2.c: New testcase.
	* gcc.dg/torture/pr45967-3.c: Likewise.

From-SVN: r168896

gcc/testsuite/ChangeLog

+2011-01-17  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/45967
+	* gcc.dg/torture/pr45967-2.c: New testcase.
+	* gcc.dg/torture/pr45967-3.c: Likewise.
+
 2011-01-16  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	PR testsuite/47325

gcc/testsuite/gcc.dg/torture/pr45967-2.c

+/* { dg-do run } */
+
+extern void abort (void);
+int b;
+void
+foo (void *p_, int *q)
+{
+  int *p;
+  int i;
+  for (i = 0; i < sizeof(int *); ++i)
+    ((char *)&p)[i] = ((char *)p_)[i];
+  if (b)
+    p = q;
+  *p = 1;
+}
+int main()
+{
+  int i = 0, j;
+  int *p = &i;
+  foo (&p, &j);
+  if (i != 1)
+    abort ();
+  return 0;
+}

gcc/testsuite/gcc.dg/torture/pr45967-3.c

+/* { dg-do run } */
+
+extern void abort (void);
+void
+foo (void *p_)
+{
+  int *p;
+  int i;
+  for (i = 0; i < sizeof(int *); ++i)
+    ((char *)&p)[i] = ((char *)p_)[i];
+  *p = 1;
+}
+int main()
+{
+  int i = 0;
+  int *p = &i;
+  foo (&p);
+  if (i != 1)
+    abort ();
+  return 0;
+}