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When UpdateDT is set, DT is invalid, which could cause problems when trying to

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use it later. I couldn't make a test that hits this with the current code.

llvm-svn: 128195
This commit is contained in:
Cameron Zwarich 2011-03-24 04:52:04 +00:00
parent 6633f15fad
commit 6862665125
1 changed files with 3 additions and 2 deletions
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5
lib/Transforms/Scalar/CodeGenPrepare.cpp
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@ -331,7 +331,7 @@ void CodeGenPrepare::EliminateMostlyEmptyBlock(BasicBlock *BB) {
// The PHIs are now updated, change everything that refers to BB to use
// DestBB and remove BB.
BB->replaceAllUsesWith(DestBB);
if (DT) {
if (DT && !UpdateDT) {
BasicBlock *BBIDom = DT->getNode(BB)->getIDom()->getBlock();
BasicBlock *DestBBIDom = DT->getNode(DestBB)->getIDom()->getBlock();
BasicBlock *NewIDom = DT->findNearestCommonDominator(BBIDom, DestBBIDom);
@ -534,7 +534,8 @@ bool CodeGenPrepare::OptimizeCallInst(CallInst *CI) {
// happens.
WeakVH IterHandle(CurInstIterator);
ReplaceAndSimplifyAllUses(CI, RetVal, TLI ? TLI->getTargetData() : 0, DT);
ReplaceAndSimplifyAllUses(CI, RetVal, TLI ? TLI->getTargetData() : 0,
UpdateDT ? 0 : DT);
// If the iterator instruction was recursively deleted, start over at the
// start of the block.