re PR tree-optimization/23777 (Does not remove all references to var)

2007-03-05  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/23777
	* gcc.dg/tree-ssa/pr23777.c: New testcase.

From-SVN: r122558

gcc/testsuite/ChangeLog

+2007-03-05  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/23777
+	* gcc.dg/tree-ssa/pr23777.c: New testcase.
+
 2007-03-04  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
 
 	PR other/30465

gcc/testsuite/gcc.dg/tree-ssa/pr23777.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+extern void f(char *const *);
+void g (char **o)
+{
+  static const char *const multilib_exclusions_raw[] = { 0 };
+  const char *const *q = multilib_exclusions_raw;
+
+  f (o);
+  while (*q++)
+    f (o);
+}
+
+/* The last DCE pass is able to remove the load from
+    multilib_exclusions_raw.  */
+
+/* { dg-final { scan-tree-dump-not "multilib_exclusions_raw" "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */