TargetTransformInfo: Add missing consts to a couple of methods (#128492)

Author: arsenm

llvm/include/llvm/Analysis/TargetTransformInfo.h

@@ -2055,8 +2055,8 @@ class TargetTransformInfo::Concept {
   virtual bool isTruncateFree(Type *Ty1, Type *Ty2) = 0;
   virtual bool isProfitableToHoist(Instruction *I) = 0;
   virtual bool useAA() = 0;
-  virtual bool isTypeLegal(Type *Ty) = 0;
-  virtual unsigned getRegUsageForType(Type *Ty) = 0;
+  virtual bool isTypeLegal(Type *Ty) const = 0;
+  virtual unsigned getRegUsageForType(Type *Ty) const = 0;
   virtual bool shouldBuildLookupTables() = 0;
   virtual bool shouldBuildLookupTablesForConstant(Constant *C) = 0;
   virtual bool shouldBuildRelLookupTables() = 0;
@@ -2645,8 +2645,8 @@ class TargetTransformInfo::Model final : public TargetTransformInfo::Concept {
     return Impl.isProfitableToHoist(I);
   }
   bool useAA() override { return Impl.useAA(); }
-  bool isTypeLegal(Type *Ty) override { return Impl.isTypeLegal(Ty); }
-  unsigned getRegUsageForType(Type *Ty) override {
+  bool isTypeLegal(Type *Ty) const override { return Impl.isTypeLegal(Ty); }
+  unsigned getRegUsageForType(Type *Ty) const override {
     return Impl.getRegUsageForType(Ty);
   }
   bool shouldBuildLookupTables() override {

llvm/include/llvm/CodeGen/BasicTTIImpl.h

@@ -465,12 +465,12 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
 
   bool useAA() const { return getST()->useAA(); }
 
-  bool isTypeLegal(Type *Ty) {
+  bool isTypeLegal(Type *Ty) const {
     EVT VT = getTLI()->getValueType(DL, Ty, /*AllowUnknown=*/true);
     return getTLI()->isTypeLegal(VT);
   }
 
-  unsigned getRegUsageForType(Type *Ty) {
+  unsigned getRegUsageForType(Type *Ty) const {
     EVT ETy = getTLI()->getValueType(DL, Ty);
     return getTLI()->getNumRegisters(Ty->getContext(), ETy);
   }

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp

@@ -2517,7 +2517,7 @@ void RISCVTTIImpl::getPeelingPreferences(Loop *L, ScalarEvolution &SE,
   BaseT::getPeelingPreferences(L, SE, PP);
 }
 
-unsigned RISCVTTIImpl::getRegUsageForType(Type *Ty) {
+unsigned RISCVTTIImpl::getRegUsageForType(Type *Ty) const {
   if (Ty->isVectorTy()) {
     // f16 with only zvfhmin and bf16 will be promoted to f32
     Type *EltTy = cast<VectorType>(Ty)->getElementType();

llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h

@@ -115,7 +115,7 @@ class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
 
   TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
 
-  unsigned getRegUsageForType(Type *Ty);
+  unsigned getRegUsageForType(Type *Ty) const;
 
   unsigned getMaximumVF(unsigned ElemWidth, unsigned Opcode) const;