diff options
Diffstat (limited to 'lib/Transforms/Utils/Local.cpp')
-rw-r--r-- | lib/Transforms/Utils/Local.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/Local.cpp b/lib/Transforms/Utils/Local.cpp index 4c2bdbc226..30e88e976f 100644 --- a/lib/Transforms/Utils/Local.cpp +++ b/lib/Transforms/Utils/Local.cpp @@ -22,6 +22,7 @@ #include "llvm/IntrinsicInst.h" #include "llvm/ADT/DenseMap.h" #include "llvm/ADT/SmallPtrSet.h" +#include "llvm/Analysis/Dominators.h" #include "llvm/Analysis/ConstantFolding.h" #include "llvm/Analysis/InstructionSimplify.h" #include "llvm/Analysis/ProfileInfo.h" @@ -401,6 +402,12 @@ void llvm::MergeBasicBlockIntoOnlyPred(BasicBlock *DestBB, Pass *P) { PredBB->replaceAllUsesWith(DestBB); if (P) { + DominatorTree *DT = P->getAnalysisIfAvailable<DominatorTree>(); + if (DT) { + BasicBlock *PredBBIDom = DT->getNode(PredBB)->getIDom()->getBlock(); + DT->changeImmediateDominator(DestBB, PredBBIDom); + DT->eraseNode(PredBB); + } ProfileInfo *PI = P->getAnalysisIfAvailable<ProfileInfo>(); if (PI) { PI->replaceAllUses(PredBB, DestBB); |