diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
index 664c360032ea3..0184e748b3d86 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
@@ -39,7 +39,7 @@ class Type;
 class Value;
 class VectorType;
 
-class AArch64TTIImpl : public BasicTTIImplBase<AArch64TTIImpl> {
+class AArch64TTIImpl final : public BasicTTIImplBase<AArch64TTIImpl> {
   using BaseT = BasicTTIImplBase<AArch64TTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/ARC/ARCTargetTransformInfo.h b/llvm/lib/Target/ARC/ARCTargetTransformInfo.h
index bb7f2a0a459c2..3d5ff6dc256d9 100644
--- a/llvm/lib/Target/ARC/ARCTargetTransformInfo.h
+++ b/llvm/lib/Target/ARC/ARCTargetTransformInfo.h
@@ -26,7 +26,7 @@ class ARCSubtarget;
 class ARCTargetLowering;
 class ARCTargetMachine;
 
-class ARCTTIImpl : public BasicTTIImplBase<ARCTTIImpl> {
+class ARCTTIImpl final : public BasicTTIImplBase<ARCTTIImpl> {
   using BaseT = BasicTTIImplBase<ARCTTIImpl>;
   friend BaseT;
 
diff --git a/llvm/lib/Target/ARM/ARMTargetTransformInfo.h b/llvm/lib/Target/ARM/ARMTargetTransformInfo.h
index 20a2c59511087..c1af4e3dc5da6 100644
--- a/llvm/lib/Target/ARM/ARMTargetTransformInfo.h
+++ b/llvm/lib/Target/ARM/ARMTargetTransformInfo.h
@@ -54,7 +54,7 @@ namespace TPLoop {
 enum MemTransfer { ForceDisabled = 0, ForceEnabled, Allow };
 }
 
-class ARMTTIImpl : public BasicTTIImplBase<ARMTTIImpl> {
+class ARMTTIImpl final : public BasicTTIImplBase<ARMTTIImpl> {
   using BaseT = BasicTTIImplBase<ARMTTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/BPF/BPFTargetTransformInfo.h b/llvm/lib/Target/BPF/BPFTargetTransformInfo.h
index e94497896f681..d7b2ceff105c9 100644
--- a/llvm/lib/Target/BPF/BPFTargetTransformInfo.h
+++ b/llvm/lib/Target/BPF/BPFTargetTransformInfo.h
@@ -21,7 +21,7 @@
 #include "llvm/Transforms/Utils/ScalarEvolutionExpander.h"
 
 namespace llvm {
-class BPFTTIImpl : public BasicTTIImplBase<BPFTTIImpl> {
+class BPFTTIImpl final : public BasicTTIImplBase<BPFTTIImpl> {
   typedef BasicTTIImplBase<BPFTTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;
diff --git a/llvm/lib/Target/DirectX/DirectXTargetTransformInfo.h b/llvm/lib/Target/DirectX/DirectXTargetTransformInfo.h
index 9f344d7d52ba0..e2dd4354a8167 100644
--- a/llvm/lib/Target/DirectX/DirectXTargetTransformInfo.h
+++ b/llvm/lib/Target/DirectX/DirectXTargetTransformInfo.h
@@ -17,7 +17,7 @@
 #include "llvm/IR/Function.h"
 
 namespace llvm {
-class DirectXTTIImpl : public BasicTTIImplBase<DirectXTTIImpl> {
+class DirectXTTIImpl final : public BasicTTIImplBase<DirectXTTIImpl> {
   using BaseT = BasicTTIImplBase<DirectXTTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
index d7509c3bb1d2f..c03cad4713e40 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
+++ b/llvm/lib/Target/Hexagon/HexagonTargetTransformInfo.h
@@ -30,7 +30,7 @@ class ScalarEvolution;
 class User;
 class Value;
 
-class HexagonTTIImpl : public BasicTTIImplBase<HexagonTTIImpl> {
+class HexagonTTIImpl final : public BasicTTIImplBase<HexagonTTIImpl> {
   using BaseT = BasicTTIImplBase<HexagonTTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h b/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
index f17abf4c8af04..0342af65c1ef7 100644
--- a/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
+++ b/llvm/lib/Target/Lanai/LanaiTargetTransformInfo.h
@@ -25,7 +25,7 @@
 #include "llvm/Support/MathExtras.h"
 
 namespace llvm {
-class LanaiTTIImpl : public BasicTTIImplBase<LanaiTTIImpl> {
+class LanaiTTIImpl final : public BasicTTIImplBase<LanaiTTIImpl> {
   typedef BasicTTIImplBase<LanaiTTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;
diff --git a/llvm/lib/Target/Mips/MipsTargetTransformInfo.h b/llvm/lib/Target/Mips/MipsTargetTransformInfo.h
index 5e3884cd80161..8f8173915b2fb 100644
--- a/llvm/lib/Target/Mips/MipsTargetTransformInfo.h
+++ b/llvm/lib/Target/Mips/MipsTargetTransformInfo.h
@@ -15,7 +15,7 @@
 
 namespace llvm {
 
-class MipsTTIImpl : public BasicTTIImplBase<MipsTTIImpl> {
+class MipsTTIImpl final : public BasicTTIImplBase<MipsTTIImpl> {
   using BaseT = BasicTTIImplBase<MipsTTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h b/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
index 98aea4e535f0a..aa7850acbd64a 100644
--- a/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
+++ b/llvm/lib/Target/NVPTX/NVPTXTargetTransformInfo.h
@@ -26,7 +26,7 @@
 
 namespace llvm {
 
-class NVPTXTTIImpl : public BasicTTIImplBase<NVPTXTTIImpl> {
+class NVPTXTTIImpl final : public BasicTTIImplBase<NVPTXTTIImpl> {
   typedef BasicTTIImplBase<NVPTXTTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;
diff --git a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h
index 361b2ff223ea0..8618f3064c188 100644
--- a/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h
+++ b/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h
@@ -24,7 +24,7 @@
 
 namespace llvm {
 
-class PPCTTIImpl : public BasicTTIImplBase<PPCTTIImpl> {
+class PPCTTIImpl final : public BasicTTIImplBase<PPCTTIImpl> {
   typedef BasicTTIImplBase<PPCTTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
index 0a784461d67bf..dd7e9f7709f8e 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
@@ -25,7 +25,7 @@
 
 namespace llvm {
 
-class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
+class RISCVTTIImpl final : public BasicTTIImplBase<RISCVTTIImpl> {
   using BaseT = BasicTTIImplBase<RISCVTTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/SPIRV/SPIRVTargetTransformInfo.h b/llvm/lib/Target/SPIRV/SPIRVTargetTransformInfo.h
index 3f211b5a8b168..40e561ba38881 100644
--- a/llvm/lib/Target/SPIRV/SPIRVTargetTransformInfo.h
+++ b/llvm/lib/Target/SPIRV/SPIRVTargetTransformInfo.h
@@ -22,7 +22,7 @@
 #include "llvm/CodeGen/BasicTTIImpl.h"
 
 namespace llvm {
-class SPIRVTTIImpl : public BasicTTIImplBase<SPIRVTTIImpl> {
+class SPIRVTTIImpl final : public BasicTTIImplBase<SPIRVTTIImpl> {
   using BaseT = BasicTTIImplBase<SPIRVTTIImpl>;
   using TTI = TargetTransformInfo;
 
diff --git a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
index b4bc41974b70b..368a4af768b3e 100644
--- a/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
+++ b/llvm/lib/Target/SystemZ/SystemZTargetTransformInfo.h
@@ -15,7 +15,7 @@
 
 namespace llvm {
 
-class SystemZTTIImpl : public BasicTTIImplBase<SystemZTTIImpl> {
+class SystemZTTIImpl final : public BasicTTIImplBase<SystemZTTIImpl> {
   typedef BasicTTIImplBase<SystemZTTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;
diff --git a/llvm/lib/Target/VE/VETargetTransformInfo.h b/llvm/lib/Target/VE/VETargetTransformInfo.h
index 5cb0286087821..5c0ddca62c761 100644
--- a/llvm/lib/Target/VE/VETargetTransformInfo.h
+++ b/llvm/lib/Target/VE/VETargetTransformInfo.h
@@ -49,7 +49,7 @@ static bool isVectorLaneType(llvm::Type &ElemTy) {
 
 namespace llvm {
 
-class VETTIImpl : public BasicTTIImplBase<VETTIImpl> {
+class VETTIImpl final : public BasicTTIImplBase<VETTIImpl> {
   using BaseT = BasicTTIImplBase<VETTIImpl>;
   friend BaseT;
 
diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.h b/llvm/lib/Target/X86/X86TargetTransformInfo.h
index 72673d6fbd80f..8045f1b1d6637 100644
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.h
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.h
@@ -25,7 +25,7 @@ namespace llvm {
 
 class InstCombiner;
 
-class X86TTIImpl : public BasicTTIImplBase<X86TTIImpl> {
+class X86TTIImpl final : public BasicTTIImplBase<X86TTIImpl> {
   typedef BasicTTIImplBase<X86TTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;
diff --git a/llvm/lib/Target/XCore/XCoreTargetTransformInfo.h b/llvm/lib/Target/XCore/XCoreTargetTransformInfo.h
index f2c10518109dc..cb809b992396a 100644
--- a/llvm/lib/Target/XCore/XCoreTargetTransformInfo.h
+++ b/llvm/lib/Target/XCore/XCoreTargetTransformInfo.h
@@ -24,7 +24,7 @@
 
 namespace llvm {
 
-class XCoreTTIImpl : public BasicTTIImplBase<XCoreTTIImpl> {
+class XCoreTTIImpl final : public BasicTTIImplBase<XCoreTTIImpl> {
   typedef BasicTTIImplBase<XCoreTTIImpl> BaseT;
   typedef TargetTransformInfo TTI;
   friend BaseT;