diff options
Diffstat (limited to 'lib/Transforms/Scalar/JumpThreading.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/JumpThreading.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp index 90094a8da2..a79b5b1938 100644 --- a/lib/Transforms/Scalar/JumpThreading.cpp +++ b/lib/Transforms/Scalar/JumpThreading.cpp @@ -928,13 +928,14 @@ bool JumpThreading::SimplifyPartiallyRedundantLoad(LoadInst *LI) { array_pod_sort(AvailablePreds.begin(), AvailablePreds.end()); // Create a PHI node at the start of the block for the PRE'd load value. + pred_iterator PB = pred_begin(LoadBB), PE = pred_end(LoadBB); PHINode *PN = PHINode::Create(LI->getType(), "", LoadBB->begin()); + PN->reserveOperandSpace(std::distance(PB, PE)); PN->takeName(LI); // Insert new entries into the PHI for each predecessor. A single block may // have multiple entries here. - for (pred_iterator PI = pred_begin(LoadBB), E = pred_end(LoadBB); PI != E; - ++PI) { + for (pred_iterator PI = PB; PI != PE; ++PI) { BasicBlock *P = *PI; AvailablePredsTy::iterator I = std::lower_bound(AvailablePreds.begin(), AvailablePreds.end(), |