[AMDGPU] Create isGFX9Plus utility function

[Joe_Nash]

Summary

Introduce a utility function to make it more
convenient to write code that is the same on
the GFX9 and GFX10 subtargets.

Use isGFX9Plus in the AsmParser for AMDGPU.

[rampitec]

LGTM

[Joe_Nash]

Thank you for the review. I do not yet have commit access so please commit this on my behalf.

llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp

public:
   bool isVI() const {
     return AMDGPU::isVI(getSTI());
   }
 
   bool isGFX9() const {
     return AMDGPU::isGFX9(getSTI());
   }
 
+  bool isGFX9Plus() const {
+    return AMDGPU::isGFX9Plus(getSTI());
+  }
+
   bool isGFX10() const {
     return AMDGPU::isGFX10(getSTI());
   }
 
   bool isGFX10_BEncoding() const {
     return AMDGPU::isGFX10_BEncoding(getSTI());
   }
 

 }
 
 bool AMDGPUAsmParser::subtargetHasRegister(const MCRegisterInfo &MRI,
                                            unsigned RegNo) const {
 
   for (MCRegAliasIterator R(AMDGPU::TTMP12_TTMP13_TTMP14_TTMP15, &MRI, true);
        R.isValid(); ++R) {
     if (*R == RegNo)
-      return isGFX9() || isGFX10();
+      return isGFX9Plus();
   }
 
   // GFX10 has 2 more SGPRs 104 and 105.
   for (MCRegAliasIterator R(AMDGPU::SGPR104_SGPR105, &MRI, true);
        R.isValid(); ++R) {
     if (*R == RegNo)
       return hasSGPR104_SGPR105();
   }

llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.h

 bool hasGFX10A16(const MCSubtargetInfo &STI);
 bool hasG16(const MCSubtargetInfo &STI);
 bool hasPackedD16(const MCSubtargetInfo &STI);
 
 bool isSI(const MCSubtargetInfo &STI);
 bool isCI(const MCSubtargetInfo &STI);
 bool isVI(const MCSubtargetInfo &STI);
 bool isGFX9(const MCSubtargetInfo &STI);
+bool isGFX9Plus(const MCSubtargetInfo &STI);
 bool isGFX10(const MCSubtargetInfo &STI);
 bool isGCN3Encoding(const MCSubtargetInfo &STI);
 bool isGFX10_BEncoding(const MCSubtargetInfo &STI);
 bool hasGFX10_3Insts(const MCSubtargetInfo &STI);
 
 /// Is Reg - scalar register
 bool isSGPR(unsigned Reg, const MCRegisterInfo* TRI);
 

llvm/lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp

 bool isVI(const MCSubtargetInfo &STI) {
   return STI.getFeatureBits()[AMDGPU::FeatureVolcanicIslands];
 }
 
 bool isGFX9(const MCSubtargetInfo &STI) {
   return STI.getFeatureBits()[AMDGPU::FeatureGFX9];
 }
 
+bool isGFX9Plus(const MCSubtargetInfo &STI) {
+  return isGFX9(STI) || isGFX10(STI);
+}
+
 bool isGFX10(const MCSubtargetInfo &STI) {
   return STI.getFeatureBits()[AMDGPU::FeatureGFX10];
 }
 
 bool isGCN3Encoding(const MCSubtargetInfo &STI) {
   return STI.getFeatureBits()[AMDGPU::FeatureGCN3Encoding];
 }