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.target/i386/pr17692.c b/gcc/testsuite/gcc.target/i386/pr17692.c
new file mode 100644
index 000000000..476d8e3de
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr17692.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O -mfpmath=sse -msse2" } */
+
+/* The fact that t1 and t2 are uninitialized is critical.  With them
+   uninitialized, the register allocator is free to put them in the same
+   hard register, which results in
+
+	xmm0 = xmm0 >= xmm0 ? xmm0 : xmm0
+
+   Which is of course a nop, but one for which we would ICE splitting the
+   pattern.  */
+   
+double out;
+
+static void foo(void)
+{
+    double t1, t2, t3, t4;
+    
+    t4 = t1 >= t2 ? t1 : t2;
+    t4 = t4 >= t3 ? t4 : t3;
+    out = t4;
+}