diff options
Diffstat (limited to 'lib/Transforms/Utils/VNCoercion.cpp')
| -rw-r--r-- | lib/Transforms/Utils/VNCoercion.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/VNCoercion.cpp b/lib/Transforms/Utils/VNCoercion.cpp index 83bd29dbca651..60d9ede2c4871 100644 --- a/lib/Transforms/Utils/VNCoercion.cpp +++ b/lib/Transforms/Utils/VNCoercion.cpp @@ -303,6 +303,15 @@ static T *getStoreValueForLoadHelper(T *SrcVal, unsigned Offset, Type *LoadTy, const DataLayout &DL) { LLVMContext &Ctx = SrcVal->getType()->getContext(); + // If two pointers are in the same address space, they have the same size, + // so we don't need to do any truncation, etc. This avoids introducing + // ptrtoint instructions for pointers that may be non-integral. + if (SrcVal->getType()->isPointerTy() && LoadTy->isPointerTy() && + cast<PointerType>(SrcVal->getType())->getAddressSpace() == + cast<PointerType>(LoadTy)->getAddressSpace()) { + return SrcVal; + } + uint64_t StoreSize = (DL.getTypeSizeInBits(SrcVal->getType()) + 7) / 8; uint64_t LoadSize = (DL.getTypeSizeInBits(LoadTy) + 7) / 8; // Compute which bits of the stored value are being used by the load. Convert |