[llvm] [AMDGPU][AArch64][SelectionDAG] Added target hook check for SelectwithConstant (PR #127599)

[Matt Arsenault via llvm-commits]

================
@@ -28189,7 +28189,7 @@ SDValue DAGCombiner::SimplifySelectCC(const SDLoc &DL, SDValue N0, SDValue N1,
   bool Fold = N2C && isNullConstant(N3) && N2C->getAPIntValue().isPowerOf2();
   bool Swap = N3C && isNullConstant(N2) && N3C->getAPIntValue().isPowerOf2();
 
-  if ((Fold || Swap) &&
+  if (TLI.convertSelectOfConstantsToMath(VT) && (Fold || Swap) &&
       TLI.getBooleanContents(CmpOpVT) ==
           TargetLowering::ZeroOrOneBooleanContent &&
       (!LegalOperations || TLI.isOperationLegal(ISD::SETCC, CmpOpVT))) {
----------------
arsenm wrote:

```suggestion
  if ((Fold || Swap) &&
      TLI.getBooleanContents(CmpOpVT) ==
          TargetLowering::ZeroOrOneBooleanContent &&
      (!LegalOperations || TLI.isOperationLegal(ISD::SETCC, CmpOpVT)) &&
      TLI.convertSelectOfConstantsToMath(VT)) {
```

Order the complex checks last 

https://github.com/llvm/llvm-project/pull/127599