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, 22 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/update-unroll-1.c b/gcc/testsuite/gcc.dg/tree-ssa/update-unroll-1.c
new file mode 100644
index 000000000..d911dd8e5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/update-unroll-1.c
@@ -0,0 +1,22 @@
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+/* { dg-require-effective-target ilp32 } */
+/* { dg-options "-O1 -fprefetch-loop-arrays -march=athlon -fdump-tree-aprefetch-blocks" } */
+
+int a[10000];
+
+int foo(unsigned n)
+{
+  unsigned i, s = 0;
+
+  for (i = 0; i < n; i++)
+    s += a[i];
+
+  return s;
+}
+
+/* We used to make the probability that the body of the loop (unrolled
+   to enable prefetching) is entered 0, which is not correct.  */
+
+/* { dg-final { scan-tree-dump-not "Invalid sum" "aprefetch"} } */
+/* { dg-final { scan-tree-dump-not "SUCC: 7 .100.0%" "aprefetch"} } */
+/* { dg-final { cleanup-tree-dump "aprefetch" } } */