diff --git a/llvm/include/llvm/Analysis/TargetTransformInfo.h b/llvm/include/llvm/Analysis/TargetTransformInfo.h
--- a/llvm/include/llvm/Analysis/TargetTransformInfo.h
+++ b/llvm/include/llvm/Analysis/TargetTransformInfo.h
@@ -1669,9 +1669,9 @@
   getPointersChainCost(ArrayRef<const Value *> Ptrs, const Value *Base,
                        const TTI::PointersChainInfo &Info, Type *AccessTy,
                        TTI::TargetCostKind CostKind) = 0;
-  virtual unsigned getInliningThresholdMultiplier() = 0;
+  virtual unsigned getInliningThresholdMultiplier() const = 0;
   virtual unsigned adjustInliningThreshold(const CallBase *CB) = 0;
-  virtual int getInlinerVectorBonusPercent() = 0;
+  virtual int getInlinerVectorBonusPercent() const = 0;
   virtual InstructionCost getMemcpyCost(const Instruction *I) = 0;
   virtual unsigned
   getEstimatedNumberOfCaseClusters(const SwitchInst &SI, unsigned &JTSize,
@@ -2032,13 +2032,13 @@
                                        TargetCostKind CostKind) override {
     return Impl.getPointersChainCost(Ptrs, Base, Info, AccessTy, CostKind);
   }
-  unsigned getInliningThresholdMultiplier() override {
+  unsigned getInliningThresholdMultiplier() const override {
     return Impl.getInliningThresholdMultiplier();
   }
   unsigned adjustInliningThreshold(const CallBase *CB) override {
     return Impl.adjustInliningThreshold(CB);
   }
-  int getInlinerVectorBonusPercent() override {
+  int getInlinerVectorBonusPercent() const override {
     return Impl.getInlinerVectorBonusPercent();
   }
   InstructionCost getMemcpyCost(const Instruction *I) override {
diff --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
--- a/llvm/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
@@ -532,10 +532,10 @@
     return TargetTransformInfo::TCC_Expensive;
   }
 
-  unsigned getInliningThresholdMultiplier() { return 1; }
+  unsigned getInliningThresholdMultiplier() const { return 1; }
   unsigned adjustInliningThreshold(const CallBase *CB) { return 0; }
 
-  int getInlinerVectorBonusPercent() { return 150; }
+  int getInlinerVectorBonusPercent() const { return 150; }
 
   void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
                                TTI::UnrollingPreferences &UP,
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.h
@@ -230,10 +230,10 @@
   bool areInlineCompatible(const Function *Caller,
                            const Function *Callee) const;
 
-  unsigned getInliningThresholdMultiplier() { return 11; }
+  unsigned getInliningThresholdMultiplier() const { return 11; }
   unsigned adjustInliningThreshold(const CallBase *CB) const;
 
-  int getInlinerVectorBonusPercent() { return 0; }
+  int getInlinerVectorBonusPercent() const { return 0; }
 
   InstructionCost getArithmeticReductionCost(
       unsigned Opcode, VectorType *Ty, std::optional<FastMathFlags> FMF,
diff --git a/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h b/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
--- a/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
+++ b/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
@@ -92,7 +92,7 @@
 
   // Increase the inlining cost threshold by a factor of 11, reflecting that
   // calls are particularly expensive in NVPTX.
-  unsigned getInliningThresholdMultiplier() { return 11; }
+  unsigned getInliningThresholdMultiplier() const { return 11; }
 
   InstructionCost getArithmeticInstrCost(
       unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
diff --git a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
--- a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
+++ b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
@@ -36,7 +36,7 @@
   /// \name Scalar TTI Implementations
   /// @{
 
-  unsigned getInliningThresholdMultiplier() { return 3; }
+  unsigned getInliningThresholdMultiplier() const { return 3; }
   unsigned adjustInliningThreshold(const CallBase *CB) const;
 
   InstructionCost getIntImmCost(const APInt &Imm, Type *Ty,