From 035fdeb37048bae2f49d3c3b8c246cfc26d9a80d Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Thu, 24 May 2007 18:31:55 +0000
Subject: [PATCH] Blocks that cond-br and uncond-br/fallthrough to same block
 should have only one successor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37324 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/BranchFolding.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 6c632c2aee3..1fe2962a365 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -672,7 +672,10 @@ static bool CorrectExtraCFGEdges(MachineBasicBlock &MBB,
   
   MachineBasicBlock::pred_iterator SI = MBB.succ_begin();
   while (SI != MBB.succ_end()) {
-    if (*SI == DestA) {
+    if (*SI == DestA && DestA == DestB) {
+      DestA = DestB = 0;
+      ++SI;
+    } else if (*SI == DestA) {
       DestA = 0;
       ++SI;
     } else if (*SI == DestB) {