diff options
Diffstat (limited to 'lib/Analysis/ScalarEvolutionExpander.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolutionExpander.cpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp index c642f7ef0c..f506514a61 100644 --- a/lib/Analysis/ScalarEvolutionExpander.cpp +++ b/lib/Analysis/ScalarEvolutionExpander.cpp @@ -932,14 +932,15 @@ SCEVExpander::getAddRecExprPHILiterally(const SCEVAddRecExpr *Normalized, Value *StepV = expandCodeFor(Step, IntTy, L->getHeader()->begin()); // Create the PHI. - Builder.SetInsertPoint(L->getHeader(), L->getHeader()->begin()); + BasicBlock *Header = L->getHeader(); + Builder.SetInsertPoint(Header, Header->begin()); + pred_iterator HPB = pred_begin(Header), HPE = pred_end(Header); PHINode *PN = Builder.CreatePHI(ExpandTy, "lsr.iv"); + PN->reserveOperandSpace(std::distance(HPB, HPE)); rememberInstruction(PN); // Create the step instructions and populate the PHI. - BasicBlock *Header = L->getHeader(); - for (pred_iterator HPI = pred_begin(Header), HPE = pred_end(Header); - HPI != HPE; ++HPI) { + for (pred_iterator HPI = HPB; HPI != HPE; ++HPI) { BasicBlock *Pred = *HPI; // Add a start value. @@ -1141,12 +1142,13 @@ Value *SCEVExpander::visitAddRecExpr(const SCEVAddRecExpr *S) { // Create and insert the PHI node for the induction variable in the // specified loop. BasicBlock *Header = L->getHeader(); + pred_iterator HPB = pred_begin(Header), HPE = pred_end(Header); CanonicalIV = PHINode::Create(Ty, "indvar", Header->begin()); + CanonicalIV->reserveOperandSpace(std::distance(HPB, HPE)); rememberInstruction(CanonicalIV); Constant *One = ConstantInt::get(Ty, 1); - for (pred_iterator HPI = pred_begin(Header), HPE = pred_end(Header); - HPI != HPE; ++HPI) { + for (pred_iterator HPI = HPB; HPI != HPE; ++HPI) { BasicBlock *HP = *HPI; if (L->contains(HP)) { // Insert a unit add instruction right before the terminator |