diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 5d6e571db12..11d6ec11ba3 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -1070,9 +1070,12 @@ unsigned X86TargetLowering::getByValTypeAlignment(const Type *Ty) const { } /// getOptimalMemOpType - Returns the target specific optimal type for load -/// and store operations as a result of memset, memcpy, and memmove -/// lowering. It returns MVT::iAny if SelectionDAG should be responsible for -/// determining it. +/// and store operations as a result of memset, memcpy, and memmove lowering. +/// 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. EVT X86TargetLowering::getOptimalMemOpType(uint64_t Size, unsigned DstAlign, unsigned SrcAlign, |
