re PR tree-optimization/55964 (Segmentation fault with -O…

re PR tree-optimization/55964 (Segmentation fault with -O -ftree-loop-distribution -funswitch-loops)

2013-04-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/55964
	* gcc.dg/torture/pr55964-2.c: New testcase.

From-SVN: r197403

gcc/testsuite/ChangeLog

 2013-04-03  Richard Biener  <rguenther@suse.de>
 
+	PR tree-optimization/55964
+	* gcc.dg/torture/pr55964-2.c: New testcase.
+
+2013-04-03  Richard Biener  <rguenther@suse.de>
+
 	PR tree-optimization/56501
 	* gcc.dg/torture/pr56501.c: New testcase.
 

gcc/testsuite/gcc.dg/torture/pr55964-2.c

+/* { dg-do compile } */
+/* { dg-options "-ftree-loop-distribution -funswitch-loops" } */
+
+struct test_struct {
+    int a, b[10], c[10], d[10];
+};
+
+extern struct test_struct* new_struct;
+
+void testfunc(struct test_struct* old_struct)
+{
+  int i;
+  for (i = 0; i < 10; ++i)
+    {
+      new_struct->b[i] = old_struct ? old_struct->b[i] : -1;
+      new_struct->c[i] = old_struct ? old_struct->c[i] : 0;
+      new_struct->d[i] = old_struct ? old_struct->d[i] : 0;
+    }
+  if (old_struct)
+    old_struct->a++;
+}