[CodeGen] Add "const" to MachineInstr::mayAlias

Summary:
The basic idea here is to make it possible to use
MachineInstr::mayAlias also when the MachineInstr
is const (or the "Other" MachineInstr is const).

The addition of const in MachineInstr::mayAlias
then rippled down to the need for adding const
in several other places, such as
TargetTransformInfo::getMemOperandWithOffset.

Reviewers: hfinkel

Reviewed By: hfinkel

Subscribers: hfinkel, MatzeB, arsenm, jvesely, nhaehnle, hiraditya, javed.absar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60856

llvm-svn: 358744

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 26d5834..7fdcb31 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -1181,8 +1181,8 @@ bool MachineInstr::isSafeToMove(AliasAnalysis *AA, bool &SawStore) const {
   return true;
 }
 
-bool MachineInstr::mayAlias(AliasAnalysis *AA, MachineInstr &Other,
-                            bool UseTBAA) {
+bool MachineInstr::mayAlias(AliasAnalysis *AA, const MachineInstr &Other,
+                            bool UseTBAA) const {
   const MachineFunction *MF = getMF();
   const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo();
   const MachineFrameInfo &MFI = MF->getFrameInfo();