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, 31 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr18628.c b/gcc/testsuite/gcc.dg/pr18628.c
new file mode 100644
index 000000000..d365075b7
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr18628.c
@@ -0,0 +1,31 @@
+/* { dg-do link } */
+/* { dg-options "-O2" } */
+
+/* PR middle-end/18628 exposed a problem in which cse folded a load
+   from a jump table into the label that was the target of the branch.
+   Unfortunately, the indirect jump was moved to a different basic
+   block, and the LABEL_REF copied to the register wasn't enough to
+   keep the cfg from optimizing the otherwise-unused label away.  So
+   we ended up with a dangling reference to the label.  */
+
+int i;
+
+int main()
+{
+  for (;;)
+  {
+    switch (i)
+    {
+      case 0:
+      case 1:
+        return 1;
+
+      case 2:
+      case 3:
+        return 0;
+
+      case 5:
+        --i;
+    }
+  }
+}