re PR tree-optimization/41643 (ICE (segmentation fault) for SPEC CPU2000's…

re PR tree-optimization/41643 (ICE (segmentation fault) for SPEC CPU2000's 176.gcc when using -fno-tree-dce)

	PR tree-optimization/41643
	* gcc.dg/pr41643.c: New test.

From-SVN: r153997

gcc/testsuite/ChangeLog

+2009-11-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/41643
+	* gcc.dg/pr41643.c: New test.
+
 2009-11-06  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/41909

gcc/testsuite/gcc.dg/pr41643.c

+/* PR tree-optimization/41643 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-tree-dce" } */
+
+struct S { int a; };
+
+int
+f (struct S *x)
+{
+  int a = x->a;
+  if (a)
+    return f (x) + a;
+  else
+    return f (x);
+}