From: Steven Bosscher <steven@gcc.gnu.org>
Date: Thu, 13 Mar 2014 18:01:48 +0000 (+0000)
Subject: re PR rtl-optimization/57320 (Shrink-wrapping leaves unreachable blocks in the CFG)
X-Git-Tag: releases/gcc-4.9.0~464
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bdc6e1ae29dbca4e3a51f6c06373f0425c239814;p=thirdparty%2Fgcc.git

re PR rtl-optimization/57320 (Shrink-wrapping leaves unreachable blocks in the CFG)

	PR rtl-optimization/57320
	* function.c (rest_of_handle_thread_prologue_and_epilogue): Cleanup
	the CFG after thread_prologue_and_epilogue_insns.

From-SVN: r208551
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 91b1e41559ef..7591cae271bc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-03-13  Steven Bosscher  <steven@gcc.gnu.org>
+
+	PR rtl-optimization/57320
+	* function.c (rest_of_handle_thread_prologue_and_epilogue): Cleanup
+	the CFG after thread_prologue_and_epilogue_insns.
+
 2014-03-13  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/57189
diff --git a/gcc/function.c b/gcc/function.c
index e67d3c1553f8..a61e4757c7a2 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -6991,6 +6991,10 @@ rest_of_handle_thread_prologue_and_epilogue (void)
      scheduling to operate in the epilogue.  */
   thread_prologue_and_epilogue_insns ();
 
+  /* Shrink-wrapping can result in unreachable edges in the epilogue,
+     see PR57320.  */
+  cleanup_cfg (0);
+
   /* The stack usage info is finalized during prologue expansion.  */
   if (flag_stack_usage_info)
     output_stack_usage ();