obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 57 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s16b.c b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s16b.c
new file mode 100644
index 000000000..1344ca955
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-reduc-dot-s16b.c
@@ -0,0 +1,57 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 64
+
+#define DOT 43680
+
+signed short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+signed short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+
+/* short->short->int dot product.  Should be vectorized on architectures
+   supporting vectorized multiplication of two short args with short result,
+   e.g "mulv4hi3" and widenning sum */
+__attribute__ ((noinline)) int
+foo (int len)
+{
+  int i;
+  int result = 0;
+  short prod;
+
+  for (i = 0; i < len; i++)
+    {
+      prod = X[i] * Y[i];
+      result += prod;
+    }
+  return result;
+}
+
+int
+main (void)
+{
+  int i, dot;
+
+  check_vect ();
+
+  for (i = 0; i < N; i++)
+    {
+      X[i] = i;
+      Y[i] = 64 - i;
+      __asm__ volatile ("");
+    }
+
+  dot = foo (N);
+  if (dot != DOT)
+    abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_short_mult && { vect_widen_sum_hi_to_si || vect_unpack } } } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { ! vect_short_mult } } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 0 "vect" { target { { ! vect_widen_sum_hi_to_si } && { ! vect_unpack } } } } } */
+
+/* { dg-final { cleanup-tree-dump "vect" } } */
+