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, 67 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/autopar/reduc-1char.c b/gcc/testsuite/gcc.dg/autopar/reduc-1char.c
new file mode 100644
index 000000000..76645c850
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/autopar/reduc-1char.c
@@ -0,0 +1,67 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-parallelize-loops=4 -fdump-tree-parloops-details -fdump-tree-optimized" } */
+
+#include <stdarg.h>
+#include <stdlib.h>
+
+#define N 1600
+#define DIFF 242
+
+unsigned char ub[N] = {1,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
+unsigned char uc[N] = {1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
+
+__attribute__ ((noinline)) void
+main1 (unsigned char x, unsigned char max_result, unsigned char min_result)
+{
+  int i;
+  unsigned char udiff = 2;
+  unsigned char umax = x;
+  unsigned char umin = x;
+
+  for (i = 0; i < N; i++) {
+    udiff += (unsigned char)(ub[i] - uc[i]);
+  }
+
+  for (i = 0; i < N; i++) {
+    umax = umax < uc[i] ? uc[i] : umax;
+  }
+
+  for (i = 0; i < N; i++) {
+    umin = umin > uc[i] ? uc[i] : umin;
+  }
+
+  /* check results:  */
+  if (udiff != DIFF)
+    abort ();
+  if (umax != max_result)
+    abort ();
+  if (umin != min_result)
+    abort ();
+}
+
+ __attribute__((noinline))
+ void init_arrays ()
+ {
+   int i;
+
+   for (i=16; i<N; i++)
+     {
+       ub[i] = 1;
+       uc[i] = 1;
+     }
+}
+
+int main (void)
+{
+  init_arrays();
+  main1 (100, 100, 1);
+  main1 (0, 15, 0);
+  return 0;
+}
+
+
+/* { dg-final { scan-tree-dump-times "Detected reduction" 3 "parloops" } } */
+/* { dg-final { scan-tree-dump-times "SUCCESS: may be parallelized" 4 "parloops" } } */
+/* { dg-final { cleanup-tree-dump "parloops" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */
+