diff options
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 { |