diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index 07681d15d87..ba899bf15bb 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -11943,9 +11943,11 @@ bool InstCombiner::SimplifyStoreAtEndOfBlock(StoreInst &SI) { return false; --BBI; } - // If this isn't a store, or isn't a store to the same location, bail out. + // If this isn't a store, isn't a store to the same location, or if the + // alignments differ, bail out. OtherStore = dyn_cast<StoreInst>(BBI); - if (!OtherStore || OtherStore->getOperand(1) != SI.getOperand(1)) + if (!OtherStore || OtherStore->getOperand(1) != SI.getOperand(1) || + OtherStore->getAlignment() != SI.getAlignment()) return false; } else { // Otherwise, the other block ended with a conditional branch. If one of the @@ -11960,7 +11962,8 @@ bool InstCombiner::SimplifyStoreAtEndOfBlock(StoreInst &SI) { for (;; --BBI) { // Check to see if we find the matching store. if ((OtherStore = dyn_cast<StoreInst>(BBI))) { - if (OtherStore->getOperand(1) != SI.getOperand(1)) + if (OtherStore->getOperand(1) != SI.getOperand(1) || + OtherStore->getAlignment() != SI.getAlignment()) return false; break; } @@ -11995,7 +11998,8 @@ bool InstCombiner::SimplifyStoreAtEndOfBlock(StoreInst &SI) { // insert it. BBI = DestBB->getFirstNonPHI(); InsertNewInstBefore(new StoreInst(MergedVal, SI.getOperand(1), - OtherStore->isVolatile()), *BBI); + OtherStore->isVolatile(), + SI.getAlignment()), *BBI); // Nuke the old stores. EraseInstFromFunction(SI); |
