diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index c5c2a5e3c5..3697b2a514 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -5437,6 +5437,28 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { } else { switch (II->getIntrinsicID()) { default: break; + case Intrinsic::ppc_altivec_lvx: + case Intrinsic::ppc_altivec_lvxl: + // Turn lvx -> load if the pointer is known aligned. + if (GetKnownAlignment(II->getOperand(1), TD) >= 16) { + Instruction *Ptr = new CastInst(II->getOperand(1), + PointerType::get(II->getType()), "tmp"); + InsertNewInstBefore(Ptr, CI); + return new LoadInst(Ptr); + } + break; + case Intrinsic::ppc_altivec_stvx: + case Intrinsic::ppc_altivec_stvxl: + // Turn stvx -> store if the pointer is known aligned. + if (GetKnownAlignment(II->getOperand(2), TD) >= 16) { + const Type *OpTy = II->getOperand(1)->getType(); + Instruction *Ptr = new CastInst(II->getOperand(2), + PointerType::get(OpTy), "tmp"); + InsertNewInstBefore(Ptr, CI); + return new StoreInst(II->getOperand(1), Ptr); + } + break; + case Intrinsic::stackrestore: { // If the save is right next to the restore, remove the restore. This can // happen when variable allocas are DCE'd. |