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| author | Evan Cheng <evan.cheng@apple.com> | 2010-04-01 20:10:42 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-04-01 20:10:42 +0000 |
| commit | bd550f62b39902cff3b8437ad50426f924ff7bfa (patch) | |
| tree | 98de32d8b770b801f66b171fb63b22c96b13d90e /include/llvm/Target/TargetLowering.h | |
| parent | 6bca06325aadae961ed677f0a77a61d59ca99a8b (diff) | |
| download | external_llvm-bd550f62b39902cff3b8437ad50426f924ff7bfa.zip external_llvm-bd550f62b39902cff3b8437ad50426f924ff7bfa.tar.gz external_llvm-bd550f62b39902cff3b8437ad50426f924ff7bfa.tar.bz2 | |
Add comments about DstAlign and SrcAlign.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100132 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Target/TargetLowering.h')
| -rw-r--r-- | include/llvm/Target/TargetLowering.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h index ad6fcef..b0534dd 100644 --- a/include/llvm/Target/TargetLowering.h +++ b/include/llvm/Target/TargetLowering.h @@ -634,8 +634,11 @@ public: /// getOptimalMemOpType - Returns the target specific optimal type for load /// and store operations as a result of memset, memcpy, and memmove lowering. - /// It returns EVT::Other if SelectionDAG should be responsible for - /// determining it. + /// If DstAlign is zero that means it's safe to destination alignment can + /// satisfy any constraint. Similarly if SrcAlign is zero it means there isn't + /// a need to check it against alignment requirement, probably because the + /// source does not need to be loaded. It returns EVT::Other if SelectionDAG + /// should be responsible for determining it. virtual EVT getOptimalMemOpType(uint64_t Size, unsigned DstAlign, unsigned SrcAlign, bool SafeToUseFP, SelectionDAG &DAG) const { |