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, 28 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/pr46880.c b/gcc/testsuite/gcc.target/i386/pr46880.c
new file mode 100644
index 000000000..bc6d64299
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr46880.c
@@ -0,0 +1,28 @@
+/* PR target/46880 */
+/* { dg-do run } */
+/* { dg-options "-O2 -fno-strict-aliasing -msse2" } */
+/* { dg-require-effective-target sse2_runtime } */
+
+typedef double __m128d __attribute__ ((__vector_size__ (16), __may_alias__));
+typedef double (*T)[2];
+
+static __attribute__ ((noinline, noclone)) __m128d
+foo (__m128d c, __m128d d)
+{
+  T cp = (T) &c;
+  T dp = (T) &d;
+  __m128d e = { (*cp)[1], (*dp)[1] };
+  return e;
+}
+
+int
+main ()
+{
+  __m128d c = { 1.0, 2.0 };
+  __m128d d = { 3.0, 4.0 };
+  union { __m128d x; double d[2]; } u;
+  u.x = foo (c, d);
+  if (u.d[0] != 2.0 || u.d[1] != 4.0)
+    __builtin_abort ();
+  return 0;
+}