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, 62 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/vect/slp-reduc-3.c b/gcc/testsuite/gcc.dg/vect/slp-reduc-3.c
new file mode 100644
index 000000000..93ca0ff2e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/slp-reduc-3.c
@@ -0,0 +1,62 @@
+/* { dg-require-effective-target vect_int } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 64
+
+#define DOT1 21834 
+#define DOT2 21876
+
+unsigned short X[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+unsigned short Y[N] __attribute__ ((__aligned__(__BIGGEST_ALIGNMENT__)));
+
+/* short->short->int dot product. 
+   Not detected as a dot-product pattern.
+   Requires support for non-widneing multiplication and widening-summation.  
+   Vectorized with loop-aware SLP. */
+__attribute__ ((noinline)) unsigned int
+foo1(int len, int *result1, int *result2) 
+{
+  int i;
+  unsigned int res1 = 10, res2 = 20;
+  unsigned short prod;
+
+  for (i=0; i<len; i++) {
+    prod = X[2*i] * Y[2*i];
+    res1 += prod;
+    prod = X[2*i+1] * Y[2*i+1];
+    res2 += prod;
+  }
+
+  *result1 = res1;
+  *result2 = res2;
+
+  return 0;
+}
+
+int main (void)
+{
+  unsigned int dot1, dot2;
+  unsigned short i;
+
+  check_vect ();
+
+  for (i=0; i<N; i++) {
+    X[i] = i;
+    Y[i] = 64-i;
+  }
+
+  foo1 (N/2, &dot1, &dot2);
+
+  if (dot1 != DOT1 || dot2 != DOT2)
+    abort ();
+
+  return 0;
+}
+
+/* The initialization loop in main also gets vectorized.  */
+/* { dg-final { scan-tree-dump-times "vect_recog_dot_prod_pattern: detected" 1 "vect" { xfail *-*-* } } } */
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 2 "vect" { target { vect_short_mult && { vect_widen_sum_hi_to_si  && vect_unpack } } } } } */ 
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { xfail { vect_widen_sum_hi_to_si_pattern ||  { ! vect_unpack } } } } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */