From 10038ab095f12163c52b06ea4479eb4622a0fb57 Mon Sep 17 00:00:00 2001
From: Evan Cheng <evan.cheng@apple.com>
Date: Fri, 8 May 2009 09:35:53 +0000
Subject: [PATCH] Reverse branch condition only when there is a conditional
 branch.

llvm-svn: 71214
---
 lib/CodeGen/CodePlacementOpt.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/CodePlacementOpt.cpp b/lib/CodeGen/CodePlacementOpt.cpp
index f6a8421c434..4276651d3bc 100644
--- a/lib/CodeGen/CodePlacementOpt.cpp
+++ b/lib/CodeGen/CodePlacementOpt.cpp
@@ -211,7 +211,8 @@ bool CodePlacementOpt::OptimizeIntraLoopEdges() {
         } else if (!FBB && SSMBB == TBB && Cond.empty()) {
           TBB = 0;
           --Cost;
-        } else if (!TII->ReverseBranchCondition(Cond)) {
+        } else if (!Cond.empty() && !TII->ReverseBranchCondition(Cond)) {
+          assert(SSMBB == TBB);
           TBB = FBB;
           FBB = 0;
           --Cost;