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 6825bfb..87a77bb 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -697,8 +697,7 @@
// 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();