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| author | Jay Foad <jay.foad@gmail.com> | 2011-03-30 11:19:20 +0000 |
|---|---|---|
| committer | Jay Foad <jay.foad@gmail.com> | 2011-03-30 11:19:20 +0000 |
| commit | d8b4fb4aab4d6fedb2b14bed1b846451b17bde7c (patch) | |
| tree | fb1299f91120b2d0bf513abc2ac6f42393fc627d /lib/Transforms/Utils/SimplifyCFG.cpp | |
| parent | 8be7d8b43cef4fda9dec3ce05449e3d74c25fb04 (diff) | |
| download | external_llvm-d8b4fb4aab4d6fedb2b14bed1b846451b17bde7c.zip external_llvm-d8b4fb4aab4d6fedb2b14bed1b846451b17bde7c.tar.gz external_llvm-d8b4fb4aab4d6fedb2b14bed1b846451b17bde7c.tar.bz2 | |
(Almost) always call reserveOperandSpace() on newly created PHINodes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128535 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | lib/Transforms/Utils/SimplifyCFG.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/Utils/SimplifyCFG.cpp b/lib/Transforms/Utils/SimplifyCFG.cpp index f924eeb..8b81555 100644 --- a/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/lib/Transforms/Utils/SimplifyCFG.cpp @@ -1598,13 +1598,15 @@ static bool SimplifyCondBranchToCondBranch(BranchInst *PBI, BranchInst *BI) { // in the constant and simplify the block result. Subsequent passes of // simplifycfg will thread the block. if (BlockIsSimpleEnoughToThreadThrough(BB)) { + pred_iterator PB = pred_begin(BB), PE = pred_end(BB); PHINode *NewPN = PHINode::Create(Type::getInt1Ty(BB->getContext()), BI->getCondition()->getName() + ".pr", BB->begin()); + NewPN->reserveOperandSpace(std::distance(PB, PE)); // Okay, we're going to insert the PHI node. Since PBI is not the only // predecessor, compute the PHI'd conditional value for all of the preds. // Any predecessor where the condition is not computable we keep symbolic. - for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI) { + for (pred_iterator PI = PB; PI != PE; ++PI) { BasicBlock *P = *PI; if ((PBI = dyn_cast<BranchInst>(P->getTerminator())) && PBI != BI && PBI->isConditional() && |