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, 56 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/vect/vect-nest-cycle-3.c b/gcc/testsuite/gcc.dg/vect/vect-nest-cycle-3.c
new file mode 100644
index 000000000..0c8f91307
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/vect-nest-cycle-3.c
@@ -0,0 +1,56 @@
+/* { dg-require-effective-target vect_float } */
+
+#include <stdarg.h>
+#include "tree-vect.h"
+
+#define N 16
+#define DIFF 82
+
+float c[N][N], b[N][N], a[N];
+
+__attribute__ ((noinline)) int 
+main1 ()
+{
+  int i, j;
+  float diff;
+
+  /* In inner loop vectorization -funsafe-math-optimizations is needed to 
+     vectorize the summation. But in outer loop vectorization the order of
+     calculation doesn't change, therefore, there is no need in that flag.  */
+  for (i = 0; i < N; i++)
+    {
+      diff = 2;
+      for (j = 0; j < N; j++) 
+        diff += (b[j][i] - c[j][i]);
+
+      a[i] = diff;
+    }
+
+  /* Check results:  */
+  for (i = 0; i < N; i++)
+    if (a[i] != DIFF)
+      abort ();
+
+  return 0;
+}
+
+int main (void)
+{ 
+  int i, j;
+
+  check_vect ();
+  
+  for (i = 0; i < N; i++)
+    for (j = 0; j < N; j++)
+      {
+        b[i][j] = i+j+5;
+        c[i][j] = i+j;
+      }
+         
+  main1 ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-times "OUTER LOOP VECTORIZED" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */