- Rename isLegalMemOpType to isSafeMemOpType. "Legal" is a very overloade term.

Also added more comments to explain why it is generally ok to return true.
- Rename getOptimalMemOpType argument IsZeroVal to ZeroOrLdSrc. It's meant to
be true for loaded source (memcpy) or zero constants (memset). The poor name
choice is probably some kind of legacy issue.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169954 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 51f2192371..59aaf6db04 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -6815,7 +6815,7 @@ PPCTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
 /// 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. If
-/// 'IsZeroVal' is true, that means it's safe to return a
+/// 'ZeroOrLdSrc' is true, that means it's safe to return a
 /// non-scalar-integer type, e.g. empty string source, constant, or loaded
 /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
 /// constant so it does not need to be loaded.
@@ -6823,7 +6823,7 @@ PPCTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
 /// target-independent logic.
 EVT PPCTargetLowering::getOptimalMemOpType(uint64_t Size,
                                            unsigned DstAlign, unsigned SrcAlign,
-                                           bool IsZeroVal,
+                                           bool ZeroOrLdSrc,
                                            bool MemcpyStrSrc,
                                            MachineFunction &MF) const {
   if (this->PPCSubTarget.isPPC64()) {