Add comments about DstAlign and SrcAlign.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100132 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.h b/lib/Target/PowerPC/PPCISelLowering.h
index bb2d84e..19fefab 100644
--- a/lib/Target/PowerPC/PPCISelLowering.h
+++ b/lib/Target/PowerPC/PPCISelLowering.h
@@ -347,6 +347,13 @@
virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
+ /// getOptimalMemOpType - Returns the target specific optimal type for load
+ /// 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.
virtual EVT getOptimalMemOpType(uint64_t Size,
unsigned DstAlign, unsigned SrcAlign,
bool SafeToUseFP, SelectionDAG &DAG) const;