Update prebuilt Clang to r416183b from Android.

https://android.googlesource.com/platform/prebuilts/clang/host/
linux-x86/+/06a71ddac05c22edb2d10b590e1769b3f8619bef

clang 12.0.5 (based on r416183b) from build 7284624.

Change-Id: I277a316abcf47307562d8b748b84870f31a72866
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/linux-x64/clang/include/llvm/Analysis/TargetFolder.h b/linux-x64/clang/include/llvm/Analysis/TargetFolder.h
index 7ab6562..b23316a 100644
--- a/linux-x64/clang/include/llvm/Analysis/TargetFolder.h
+++ b/linux-x64/clang/include/llvm/Analysis/TargetFolder.h
@@ -22,22 +22,23 @@
 #include "llvm/Analysis/ConstantFolding.h"
 #include "llvm/IR/Constants.h"
 #include "llvm/IR/InstrTypes.h"
+#include "llvm/IR/IRBuilderFolder.h"
 
 namespace llvm {
 
 class DataLayout;
 
 /// TargetFolder - Create constants with target dependent folding.
-class TargetFolder {
+class TargetFolder final : public IRBuilderFolder {
   const DataLayout &DL;
 
   /// Fold - Fold the constant using target specific information.
   Constant *Fold(Constant *C) const {
-    if (Constant *CF = ConstantFoldConstant(C, DL))
-      return CF;
-    return C;
+    return ConstantFoldConstant(C, DL);
   }
 
+  virtual void anchor();
+
 public:
   explicit TargetFolder(const DataLayout &DL) : DL(DL) {}
 
@@ -46,66 +47,70 @@
   //===--------------------------------------------------------------------===//
 
   Constant *CreateAdd(Constant *LHS, Constant *RHS,
-                      bool HasNUW = false, bool HasNSW = false) const {
+                      bool HasNUW = false, bool HasNSW = false) const override {
     return Fold(ConstantExpr::getAdd(LHS, RHS, HasNUW, HasNSW));
   }
-  Constant *CreateFAdd(Constant *LHS, Constant *RHS) const {
+  Constant *CreateFAdd(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getFAdd(LHS, RHS));
   }
   Constant *CreateSub(Constant *LHS, Constant *RHS,
-                      bool HasNUW = false, bool HasNSW = false) const {
+                      bool HasNUW = false, bool HasNSW = false) const override {
     return Fold(ConstantExpr::getSub(LHS, RHS, HasNUW, HasNSW));
   }
-  Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
+  Constant *CreateFSub(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getFSub(LHS, RHS));
   }
   Constant *CreateMul(Constant *LHS, Constant *RHS,
-                      bool HasNUW = false, bool HasNSW = false) const {
+                      bool HasNUW = false, bool HasNSW = false) const override {
     return Fold(ConstantExpr::getMul(LHS, RHS, HasNUW, HasNSW));
   }
-  Constant *CreateFMul(Constant *LHS, Constant *RHS) const {
+  Constant *CreateFMul(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getFMul(LHS, RHS));
   }
-  Constant *CreateUDiv(Constant *LHS, Constant *RHS, bool isExact = false)const{
+  Constant *CreateUDiv(Constant *LHS, Constant *RHS,
+                       bool isExact = false) const override {
     return Fold(ConstantExpr::getUDiv(LHS, RHS, isExact));
   }
-  Constant *CreateSDiv(Constant *LHS, Constant *RHS, bool isExact = false)const{
+  Constant *CreateSDiv(Constant *LHS, Constant *RHS,
+                       bool isExact = false) const override {
     return Fold(ConstantExpr::getSDiv(LHS, RHS, isExact));
   }
-  Constant *CreateFDiv(Constant *LHS, Constant *RHS) const {
+  Constant *CreateFDiv(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getFDiv(LHS, RHS));
   }
-  Constant *CreateURem(Constant *LHS, Constant *RHS) const {
+  Constant *CreateURem(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getURem(LHS, RHS));
   }
-  Constant *CreateSRem(Constant *LHS, Constant *RHS) const {
+  Constant *CreateSRem(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getSRem(LHS, RHS));
   }
-  Constant *CreateFRem(Constant *LHS, Constant *RHS) const {
+  Constant *CreateFRem(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getFRem(LHS, RHS));
   }
   Constant *CreateShl(Constant *LHS, Constant *RHS,
-                      bool HasNUW = false, bool HasNSW = false) const {
+                      bool HasNUW = false, bool HasNSW = false) const override {
     return Fold(ConstantExpr::getShl(LHS, RHS, HasNUW, HasNSW));
   }
-  Constant *CreateLShr(Constant *LHS, Constant *RHS, bool isExact = false)const{
+  Constant *CreateLShr(Constant *LHS, Constant *RHS,
+                       bool isExact = false) const override {
     return Fold(ConstantExpr::getLShr(LHS, RHS, isExact));
   }
-  Constant *CreateAShr(Constant *LHS, Constant *RHS, bool isExact = false)const{
+  Constant *CreateAShr(Constant *LHS, Constant *RHS,
+                       bool isExact = false) const override {
     return Fold(ConstantExpr::getAShr(LHS, RHS, isExact));
   }
-  Constant *CreateAnd(Constant *LHS, Constant *RHS) const {
+  Constant *CreateAnd(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getAnd(LHS, RHS));
   }
-  Constant *CreateOr(Constant *LHS, Constant *RHS) const {
+  Constant *CreateOr(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getOr(LHS, RHS));
   }
-  Constant *CreateXor(Constant *LHS, Constant *RHS) const {
+  Constant *CreateXor(Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::getXor(LHS, RHS));
   }
 
   Constant *CreateBinOp(Instruction::BinaryOps Opc,
-                        Constant *LHS, Constant *RHS) const {
+                        Constant *LHS, Constant *RHS) const override {
     return Fold(ConstantExpr::get(Opc, LHS, RHS));
   }
 
@@ -114,17 +119,17 @@
   //===--------------------------------------------------------------------===//
 
   Constant *CreateNeg(Constant *C,
-                      bool HasNUW = false, bool HasNSW = false) const {
+                      bool HasNUW = false, bool HasNSW = false) const override {
     return Fold(ConstantExpr::getNeg(C, HasNUW, HasNSW));
   }
-  Constant *CreateFNeg(Constant *C) const {
+  Constant *CreateFNeg(Constant *C) const override {
     return Fold(ConstantExpr::getFNeg(C));
   }
-  Constant *CreateNot(Constant *C) const {
+  Constant *CreateNot(Constant *C) const override {
     return Fold(ConstantExpr::getNot(C));
   }
 
-  Constant *CreateUnOp(Instruction::UnaryOps Opc, Constant *C) const {
+  Constant *CreateUnOp(Instruction::UnaryOps Opc, Constant *C) const override {
     return Fold(ConstantExpr::get(Opc, C));
   }
 
@@ -133,33 +138,34 @@
   //===--------------------------------------------------------------------===//
 
   Constant *CreateGetElementPtr(Type *Ty, Constant *C,
-                                ArrayRef<Constant *> IdxList) const {
+                                ArrayRef<Constant *> IdxList) const override {
     return Fold(ConstantExpr::getGetElementPtr(Ty, C, IdxList));
   }
-  Constant *CreateGetElementPtr(Type *Ty, Constant *C, Constant *Idx) const {
+  Constant *CreateGetElementPtr(Type *Ty, Constant *C,
+                                Constant *Idx) const override {
     // This form of the function only exists to avoid ambiguous overload
     // warnings about whether to convert Idx to ArrayRef<Constant *> or
     // ArrayRef<Value *>.
     return Fold(ConstantExpr::getGetElementPtr(Ty, C, Idx));
   }
   Constant *CreateGetElementPtr(Type *Ty, Constant *C,
-                                ArrayRef<Value *> IdxList) const {
+                                ArrayRef<Value *> IdxList) const override {
     return Fold(ConstantExpr::getGetElementPtr(Ty, C, IdxList));
   }
 
-  Constant *CreateInBoundsGetElementPtr(Type *Ty, Constant *C,
-                                        ArrayRef<Constant *> IdxList) const {
+  Constant *CreateInBoundsGetElementPtr(
+      Type *Ty, Constant *C, ArrayRef<Constant *> IdxList) const override {
     return Fold(ConstantExpr::getInBoundsGetElementPtr(Ty, C, IdxList));
   }
   Constant *CreateInBoundsGetElementPtr(Type *Ty, Constant *C,
-                                        Constant *Idx) const {
+                                        Constant *Idx) const override {
     // This form of the function only exists to avoid ambiguous overload
     // warnings about whether to convert Idx to ArrayRef<Constant *> or
     // ArrayRef<Value *>.
     return Fold(ConstantExpr::getInBoundsGetElementPtr(Ty, C, Idx));
   }
-  Constant *CreateInBoundsGetElementPtr(Type *Ty, Constant *C,
-                                        ArrayRef<Value *> IdxList) const {
+  Constant *CreateInBoundsGetElementPtr(
+      Type *Ty, Constant *C, ArrayRef<Value *> IdxList) const override {
     return Fold(ConstantExpr::getInBoundsGetElementPtr(Ty, C, IdxList));
   }
 
@@ -168,54 +174,54 @@
   //===--------------------------------------------------------------------===//
 
   Constant *CreateCast(Instruction::CastOps Op, Constant *C,
-                       Type *DestTy) const {
+                       Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getCast(Op, C, DestTy));
   }
   Constant *CreateIntCast(Constant *C, Type *DestTy,
-                          bool isSigned) const {
+                          bool isSigned) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
   }
-  Constant *CreatePointerCast(Constant *C, Type *DestTy) const {
+  Constant *CreatePointerCast(Constant *C, Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getPointerCast(C, DestTy));
   }
-  Constant *CreateFPCast(Constant *C, Type *DestTy) const {
+  Constant *CreateFPCast(Constant *C, Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getFPCast(C, DestTy));
   }
-  Constant *CreateBitCast(Constant *C, Type *DestTy) const {
+  Constant *CreateBitCast(Constant *C, Type *DestTy) const override {
     return CreateCast(Instruction::BitCast, C, DestTy);
   }
-  Constant *CreateIntToPtr(Constant *C, Type *DestTy) const {
+  Constant *CreateIntToPtr(Constant *C, Type *DestTy) const override {
     return CreateCast(Instruction::IntToPtr, C, DestTy);
   }
-  Constant *CreatePtrToInt(Constant *C, Type *DestTy) const {
+  Constant *CreatePtrToInt(Constant *C, Type *DestTy) const override {
     return CreateCast(Instruction::PtrToInt, C, DestTy);
   }
-  Constant *CreateZExtOrBitCast(Constant *C, Type *DestTy) const {
+  Constant *CreateZExtOrBitCast(Constant *C, Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getZExtOrBitCast(C, DestTy));
   }
-  Constant *CreateSExtOrBitCast(Constant *C, Type *DestTy) const {
+  Constant *CreateSExtOrBitCast(Constant *C, Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getSExtOrBitCast(C, DestTy));
   }
-  Constant *CreateTruncOrBitCast(Constant *C, Type *DestTy) const {
+  Constant *CreateTruncOrBitCast(Constant *C, Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getTruncOrBitCast(C, DestTy));
   }
 
   Constant *CreatePointerBitCastOrAddrSpaceCast(Constant *C,
-                                                Type *DestTy) const {
+                                                Type *DestTy) const override {
     if (C->getType() == DestTy)
       return C; // avoid calling Fold
     return Fold(ConstantExpr::getPointerBitCastOrAddrSpaceCast(C, DestTy));
@@ -226,11 +232,11 @@
   //===--------------------------------------------------------------------===//
 
   Constant *CreateICmp(CmpInst::Predicate P, Constant *LHS,
-                       Constant *RHS) const {
+                       Constant *RHS) const override {
     return Fold(ConstantExpr::getCompare(P, LHS, RHS));
   }
   Constant *CreateFCmp(CmpInst::Predicate P, Constant *LHS,
-                       Constant *RHS) const {
+                       Constant *RHS) const override {
     return Fold(ConstantExpr::getCompare(P, LHS, RHS));
   }
 
@@ -238,31 +244,32 @@
   // Other Instructions
   //===--------------------------------------------------------------------===//
 
-  Constant *CreateSelect(Constant *C, Constant *True, Constant *False) const {
+  Constant *CreateSelect(Constant *C, Constant *True,
+                         Constant *False) const override {
     return Fold(ConstantExpr::getSelect(C, True, False));
   }
 
-  Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const {
+  Constant *CreateExtractElement(Constant *Vec, Constant *Idx) const override {
     return Fold(ConstantExpr::getExtractElement(Vec, Idx));
   }
 
   Constant *CreateInsertElement(Constant *Vec, Constant *NewElt,
-                                Constant *Idx) const {
+                                Constant *Idx) const override {
     return Fold(ConstantExpr::getInsertElement(Vec, NewElt, Idx));
   }
 
   Constant *CreateShuffleVector(Constant *V1, Constant *V2,
-                                Constant *Mask) const {
+                                ArrayRef<int> Mask) const override {
     return Fold(ConstantExpr::getShuffleVector(V1, V2, Mask));
   }
 
   Constant *CreateExtractValue(Constant *Agg,
-                               ArrayRef<unsigned> IdxList) const {
+                               ArrayRef<unsigned> IdxList) const override {
     return Fold(ConstantExpr::getExtractValue(Agg, IdxList));
   }
 
   Constant *CreateInsertValue(Constant *Agg, Constant *Val,
-                              ArrayRef<unsigned> IdxList) const {
+                              ArrayRef<unsigned> IdxList) const override {
     return Fold(ConstantExpr::getInsertValue(Agg, Val, IdxList));
   }
 };