From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; 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.
---
 gcc/testsuite/gcc.dg/pr20017.c | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 gcc/testsuite/gcc.dg/pr20017.c

(limited to 'gcc/testsuite/gcc.dg/pr20017.c')

diff --git a/gcc/testsuite/gcc.dg/pr20017.c b/gcc/testsuite/gcc.dg/pr20017.c
new file mode 100644
index 000000000..1fd6d586e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr20017.c
@@ -0,0 +1,41 @@
+/* PR rtl-optimization/20017
+
+   After CSE/GCSE folds a switch statement to an unconditional jump,
+   cfg_cleanup did not remove a dead jump table, confusing the CFG
+   layout code later on.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O1" } */
+/* { dg-options "-O1 -march=i386" { target { { i?86-*-* x86_64-*-* } && ilp32 } } } */
+
+int
+foo (int *buf, int *p)
+{
+  int result;
+  const int *tmp;
+
+  if (*buf)
+    return 1;
+
+  result = 2;
+  *buf = 2;
+  tmp = buf;
+  switch (*tmp)
+    {
+    case 3:
+    case 4:
+    case 6:
+    case 14:
+      return 1;
+
+    case 0:
+      result = *p;
+
+      /* Fall through.  */
+    default:
+      if (result)
+	return 1;
+    }
+
+  return 0;
+}
-- 
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