1 files changed, 46 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s8c.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s8c.c
new file mode 100644
index 000000000..59b174e3f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s8c.c
@@ -0,0 +1,46 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 64
+
+#define DOT3 43680
+
+signed char X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+signed char Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+
+/* char->int->int dot product. 
+   Not detected as a dot-product pattern.  */
+__attribute__ ((noinline)) int
+foo3(int len) {
+  int i;
+  int result = 0;
+
+  for (i=0; i<len; i++) {
+    result += (X[i] * Y[i]);
+  }
+  return result;
+}
+
+int main (void)
+{
+  int i, dot3;
+
+  check_vect ();
+
+  for (i=0; i<N; i++) {
+    X[i] = i;
+    Y[i] = 64-i;
+    __asm__ volatile ("");
+  }
+
+  dot3 = foo3 (N);
+  if (dot3 != DOT3)
+    abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target vect_unpack } } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */