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/pr29921-2.c b/gcc/testsuite/gcc.dg/pr29921-2.c
new file mode 100644
index 000000000..8cf665eed
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr29921-2.c
@@ -0,0 +1,27 @@
+/* With -ffast-math, the latice value for sum2 used to change from NaN to
+   VARYING, in turn causing the lattice value of sum1 * sum2 change from
+   NaN to 0 (since sum1 is believed to be 0 at that moment, and
+   0 * VARYING = 0 with -ffast-math), which caused an ICE.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math" } */
+
+int
+foo (float *array, int end)
+{
+  int i;
+  float sum1, sum2;
+
+  sum2 = 0;
+  for (i = 0; i < end; i++)
+    sum2 = sum2+array[i];
+  sum2 = 1./sum2;
+  sum1 = 0.;
+  for (i = 0; i < end; i++)
+    sum1 = sum1+array[i];
+  sum1 = sum1 * sum2;
+  if (-10.0 / sum1 < 5.E-5)
+    end = 0;
+  return end;
+}
+