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, 27 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-15.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-15.c
new file mode 100644
index 000000000..aa0747b6e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-15.c
@@ -0,0 +1,27 @@
+/* A test for # of iterations analysis (signed counter cannot wrap) and final
+   value replacement.  */
+
+/* { dg-options "-O2 -fdump-tree-optimized" } */
+
+int foo(void);
+
+int bla(void)
+{
+  int i, n = foo (), j;
+
+  j = 0;
+  /* The loop should be removed completely.  */
+  for (i = 1; i <= n; i++)
+    j += n;
+
+  /* Should be replaced with return n * n;  */
+  return j;
+}
+
+/* Since the loop is removed, there should be no addition.  */
+/* { dg-final { scan-tree-dump-times "\\+" 0 "optimized" } } */
+/* { dg-final { scan-tree-dump-times "n_. \\* n_." 1 "optimized" } } */
+
+/* The if from the loop header copying remains in the code.  */
+/* { dg-final { scan-tree-dump-times "if " 1 "optimized" } } */
+/* { dg-final { cleanup-tree-dump "optimized" } } */