From: Dale Johannesen <dalej@apple.com>
Date: Tue, 1 Jul 2008 21:50:14 +0000 (+0000)
Subject: Fix longstanding thinko:  don't exclude
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=62bc8a44868bd86e96bdbd2f0d66dda690cc66ad;p=oota-llvm.git

Fix longstanding thinko:  don't exclude
predessors of exit blocks from tail merging
consideration.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52985 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index 6825bfb1033..87a77bb14f2 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -697,8 +697,7 @@ bool BranchFolder::TailMergeBlocks(MachineFunction &MF) {
   // transformations.)
 
   for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
-    if (!I->succ_empty() && I->pred_size() >= 2 && 
-         I->pred_size() < TailMergeThreshold) {
+    if (I->pred_size() >= 2 && I->pred_size() < TailMergeThreshold) {
       MachineBasicBlock *IBB = I;
       MachineBasicBlock *PredBB = prior(I);
       MergePotentials.clear();