1 files changed, 63 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/autopar/reduc-6.c b/gcc/testsuite/gcc.dg/autopar/reduc-6.c
new file mode 100644
index 000000000..fface8fed
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/autopar/reduc-6.c
@@ -0,0 +1,63 @@
+/* { 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
+#define DIFF 2558402
+
+
+__attribute__ ((noinline))
+int main1 (float x, float max_result)
+{
+  int i;
+  float b[N];
+  float c[N];
+  float diff = 2;
+  float max = x;
+  float min = 10;
+
+  for (i=0; i<N; i++)
+    {
+      b[i] = i * 3;
+      c[i] = i;
+    }
+  
+  for (i = 0; i < N; i++) {
+    diff += (b[i] - c[i]);
+  }
+
+  for (i = 0; i < N; i++) {
+    max = max < c[i] ? c[i] : max;
+  }
+
+  for (i = 0; i < N; i++) {
+    min = min > c[i] ? c[i] : min;
+  }
+
+  /* check results:  */
+  if (diff != DIFF)
+    abort ();
+  if (max != max_result)
+    abort ();
+  if (min != 0)
+    abort ();
+
+  return 0;
+}
+
+int main (void)
+{ 
+  main1 (2000, 2000);
+  main1 (0, 1599);
+  return 0;
+}
+
+
+/* need -ffast-math to  parallelize these loops.  */
+/* { dg-final { scan-tree-dump-times "Detected reduction" 0 "parloops" } } */
+/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 1 "parloops" } } */
+/* { dg-final { scan-tree-dump-times "FAILED: it is not a part of reduction" 3 "parloops" } } */
+/* { dg-final { cleanup-tree-dump "parloops" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */