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| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-11-15 23:09:33 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-11-15 23:09:33 +0000 |
| commit | 4634338655449a6e76b6a948c91fbe5bc736d24b (patch) | |
| tree | f426ed0662f93ab45e2b5cb927f819dfd28c62b2 /lib/Transforms | |
| parent | cbc85a270d2546c49fc09f700687de2ecd46bd87 (diff) | |
| download | llvm-4634338655449a6e76b6a948c91fbe5bc736d24b.tar.gz llvm-4634338655449a6e76b6a948c91fbe5bc736d24b.tar.bz2 llvm-4634338655449a6e76b6a948c91fbe5bc736d24b.tar.xz | |
LoopVectorizer: Use abi alignment for accesses with no alignment
When we vectorize a scalar access with no alignment specified, we have to set
the target's abi alignment of the scalar access on the vectorized access.
Using the same alignment of zero would be wrong because most targets will have a
bigger abi alignment for vector types.
This probably fixes PR17878.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194876 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Vectorize/LoopVectorize.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/Vectorize/LoopVectorize.cpp b/lib/Transforms/Vectorize/LoopVectorize.cpp index bc649b3dbb..e624bb49f2 100644 --- a/lib/Transforms/Vectorize/LoopVectorize.cpp +++ b/lib/Transforms/Vectorize/LoopVectorize.cpp @@ -1205,6 +1205,10 @@ void InnerLoopVectorizer::vectorizeMemoryInstruction(Instruction *Instr, Type *DataTy = VectorType::get(ScalarDataTy, VF); Value *Ptr = LI ? LI->getPointerOperand() : SI->getPointerOperand(); unsigned Alignment = LI ? LI->getAlignment() : SI->getAlignment(); + // An alignment of 0 means target abi alignment. We need to use the scalar's + // target abi alignment in such a case. + if (!Alignment) + Alignment = DL->getABITypeAlignment(ScalarDataTy); unsigned AddressSpace = Ptr->getType()->getPointerAddressSpace(); unsigned ScalarAllocatedSize = DL->getTypeAllocSize(ScalarDataTy); unsigned VectorElementSize = DL->getTypeStoreSize(DataTy)/VF; |