1 files changed, 57 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/autopar/reduc-3.c b/gcc/testsuite/gcc.dg/autopar/reduc-3.c
new file mode 100644
index 000000000..6bc204711
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/autopar/reduc-3.c
@@ -0,0 +1,57 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops-details -fdump-tree-optimized" } */
+
+#include <stdarg.h>
+#include <stdlib.h>
+
+#define N 1600
+
+unsigned int ub[N];
+unsigned int uc[N];
+
+/* Reduction of unsigned-int.  */
+
+__attribute__ ((noinline))
+int main1 (int n, int res)
+{
+  int i;
+  unsigned int udiff;
+
+  udiff = 0;
+  for (i = 0; i < n; i++) {
+    udiff += (ub[i] - uc[i]);
+  }
+
+  /* check results:  */
+  if (udiff != res)
+    abort ();
+
+  return 0;
+}
+
+__attribute__((noinline))
+void init_arrays ()
+{
+  int i;
+  
+  for (i=0; i<N; i++)
+    {
+      ub[i] = i * 3;
+      uc[i] = i;
+    }
+}
+
+int main (void)
+{ 
+  init_arrays ();
+  main1 (N, 2558400);
+  main1 (N-1, 2555202);
+  return 0;
+}
+
+
+/* { dg-final { scan-tree-dump-times "Detected reduction" 1 "parloops" } } */
+/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 2 "parloops" } } */
+/* { dg-final { cleanup-tree-dump "parloops" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
+