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, 20 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr29921.c b/gcc/testsuite/gcc.dg/pr29921.c
new file mode 100644
index 000000000..7689f54ce
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr29921.c
@@ -0,0 +1,20 @@
+/* With -ffast-math, the latice value for t changes from -0.0 to 0.0 in this
+   testcase.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math" } */
+
+double test (int param)
+{
+  double a = 0.0, b = -1.0, t;
+  int i;
+
+  for (i = 0; i < 100; i++)
+    {
+      t = a * b;
+      if (param)
+	b = 2.0;
+    }
+
+  return t;
+}