* gcc.dg/loop-4.c: New test.

From-SVN: r81946

gcc/testsuite/gcc.dg/loop-4.c

+/* PR optimization/11841 */
+/* Originator: Andrey Panov <panov@canopus.iacp.dvo.ru> */
+/* Reduced testcase by Volker Reichelt <reichelt@igpm.rwth-aachen.de> */
+
+/* Verify that the (old) loop unroller doesn't wrongly mark a pseudo
+   referenced in a note as local.  */
+
+/* { dg-do run } */
+/* { dg-options "-O2 -funroll-loops" } */
+
+int *a;
+
+int main()
+{
+  double d[6];
+  int i, j;
+
+  for (i=0; i<4; ++i)
+    for (j=0; j<3; ++j)
+      d[i+j] = 0;
+
+  a = &i;
+
+  return 0;
+}