1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/vect-widen-mult-sum.c b/gcc/testsuite/gcc.dg/vect/vect-widen-mult-sum.c
new file mode 100644
index 000000000..289891830
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-widen-mult-sum.c
@@ -0,0 +1,47 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 64
+#define SUM 0 
+ 
+/* Require widening-mult or data-unpacking (for the type promotion).  */
+__attribute__ ((noinline)) int
+main1 (short *in, int off, short scale, int n)
+{
+ int i;
+ int sum = 0;
+
+ for (i = 0; i < n; i++) {
+   sum += ((int) in[i] * (int) in[i+off]) >> scale;
+ }
+
+ return sum;
+}
+
+int main (void)
+{
+  int i;
+  int sum;
+  short X[N];
+
+  check_vect ();
+
+  for (i=0; i<N; i++) {
+    X[i] = 16-i; 
+    __asm__ volatile ("");
+  }
+
+  sum = main1 (X, 1, 16, N-1);
+  
+  if (sum != SUM)
+    abort ();
+
+  return 0;
+}
+
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_widen_mult_hi_to_si } } } */
+/* { dg-final { scan-tree-dump-times "vect_recog_widen_mult_pattern: detected" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */