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, 34 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/pr20204.c b/gcc/testsuite/gcc.target/i386/pr20204.c
new file mode 100644
index 000000000..ca97a3ae9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr20204.c
@@ -0,0 +1,34 @@
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+void *x (void *pdst, const void *psrc, unsigned int pn)
+{
+  register void *return_dst = pdst;
+  register unsigned char *dst = pdst;
+  register unsigned const char *src = psrc;
+  register int n __asm__ ("ebx") = pn;
+
+  if (src < dst && dst < src + n)
+    {
+      src += n;
+      dst += n;
+      while (n--)
+        *--dst = *--src;
+      return return_dst;
+    }
+
+  while (n >= 16) n--;
+
+  return return_dst;
+}
+extern void abort ();
+extern void exit (int);
+char xx[30] = "abc";
+int main (void)
+{
+  char yy[30] = "aab";
+
+  if (x (xx + 1, xx, 2) != xx + 1 || memcmp (xx, yy, sizeof (yy)) != 0)
+    abort ();
+  exit (0);
+}