[PATCH] New testcase

[Richard Guenther <rguenther@suse.de>]

While trying to work on PR36291.

Committed as obvious.

Richard.

2008-05-22  Richard Guenther  <rguenther@suse.de>

	* gcc.c-torture/execute/20080522-1.c: New testcase.

Index: testsuite/gcc.c-torture/execute/20080522-1.c
===================================================================
--- testsuite/gcc.c-torture/execute/20080522-1.c	(revision 0)
+++ testsuite/gcc.c-torture/execute/20080522-1.c	(revision 0)
@@ -0,0 +1,43 @@
+/* This testcase is to make sure we have i in referenced vars and that we
+   properly compute aliasing for the loads and stores.  */
+
+extern void abort (void);
+
+static int i;
+static int *p = &i;
+
+int __attribute__((noinline))
+foo(int *q)
+{
+  *p = 1;
+  *q = 2;
+  return *p;
+}
+
+int __attribute__((noinline))
+bar(int *q)
+{
+  *q = 2;
+  *p = 1;
+  return *q;
+}
+
+int main()
+{
+  int j = 0;
+
+  if (foo(&i) != 2)
+    abort ();
+  if (bar(&i) != 1)
+    abort ();
+  if (foo(&j) != 1)
+    abort ();
+  if (j != 2)
+    abort ();
+  if (bar(&j) != 2)
+    abort ();
+  if (j != 2)
+    abort ();
+
+  return 0;
+}