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, 51 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/pr48721.c b/gcc/testsuite/gcc.target/i386/pr48721.c
new file mode 100644
index 000000000..f37a16949
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr48721.c
@@ -0,0 +1,51 @@
+/* PR rtl-optimization/48721 */
+/* { dg-do compile } */
+/* { dg-options "-O -foptimize-sibling-calls -fsched2-use-superblocks -fschedule-insns2 -mtune=core2" } */
+
+extern unsigned char a[];
+extern int b[], d[], e[], f[], g[], *h[], m[], *n[], o[];
+extern char c[];
+
+struct S
+{
+  unsigned char s1;
+  int s2, s3, s4, s5, s6, s7, s8;
+};
+
+__attribute__((noinline, noclone)) int
+foo (int x)
+{
+  return 0;
+}
+
+int
+bar (int x, struct S *y)
+{
+  int z;
+  switch (x)
+    {
+    case 1:
+    case 2:
+      {
+	int t2, t4, t5, t6, t7, t8;
+	z = o[y->s8 * 6];
+	t8 = *n[m[x] * 5];
+	t4 = *h[y->s7];
+	t7 = z;
+	z = g[f[x] + y->s6];
+	t6 = e[y->s5];
+	t5 = d[c[x] + y->s3 * 17];
+	if (z)
+	  t2 = b[z];
+	if (a[z] != y->s1)
+	  return foo (x);
+	y->s8 = t8;
+	y->s4 = t4;
+	y->s7 = t7;
+	y->s6 = t6;
+	y->s5 = t5;
+	y->s2 = t2;
+      }
+    }
+  return 0;
+}