YDB Import 588

1384556be6811c00a4098d426b8eda9be6d2a541

1 files changed, 0 insertions, 5187 deletions

diff --git a/contrib/libs/clang14/lib/CodeGen/CGExprScalar.cpp b/contrib/libs/clang14/lib/CodeGen/CGExprScalar.cpp
deleted file mode 100644
index 4e8933fffe0..00000000000
--- a/contrib/libs/clang14/lib/CodeGen/CGExprScalar.cpp
+++ /dev/null
@@ -1,5187 +0,0 @@
-//===--- CGExprScalar.cpp - Emit LLVM Code for Scalar Exprs ---------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This contains code to emit Expr nodes with scalar LLVM types as LLVM code.
-//
-//===----------------------------------------------------------------------===//
-
-#include "CGCXXABI.h"
-#include "CGCleanup.h"
-#include "CGDebugInfo.h"
-#include "CGObjCRuntime.h"
-#include "CGOpenMPRuntime.h"
-#include "CodeGenFunction.h"
-#include "CodeGenModule.h"
-#include "ConstantEmitter.h"
-#include "TargetInfo.h"
-#include "clang/AST/ASTContext.h"
-#include "clang/AST/Attr.h"
-#include "clang/AST/DeclObjC.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/RecordLayout.h"
-#include "clang/AST/StmtVisitor.h"
-#include "clang/Basic/CodeGenOptions.h"
-#include "clang/Basic/TargetInfo.h"
-#include "llvm/ADT/APFixedPoint.h"
-#include "llvm/ADT/Optional.h"
-#include "llvm/IR/CFG.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/FixedPointBuilder.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/GetElementPtrTypeIterator.h"
-#include "llvm/IR/GlobalVariable.h"
-#include "llvm/IR/Intrinsics.h"
-#include "llvm/IR/IntrinsicsPowerPC.h"
-#include "llvm/IR/MatrixBuilder.h"
-#include "llvm/IR/Module.h"
-#include <cstdarg>
-
-using namespace clang;
-using namespace CodeGen;
-using llvm::Value;
-
-//===----------------------------------------------------------------------===//
-//                         Scalar Expression Emitter
-//===----------------------------------------------------------------------===//
-
-namespace {
-
-/// Determine whether the given binary operation may overflow.
-/// Sets \p Result to the value of the operation for BO_Add, BO_Sub, BO_Mul,
-/// and signed BO_{Div,Rem}. For these opcodes, and for unsigned BO_{Div,Rem},
-/// the returned overflow check is precise. The returned value is 'true' for
-/// all other opcodes, to be conservative.
-bool mayHaveIntegerOverflow(llvm::ConstantInt *LHS, llvm::ConstantInt *RHS,
-                             BinaryOperator::Opcode Opcode, bool Signed,
-                             llvm::APInt &Result) {
-  // Assume overflow is possible, unless we can prove otherwise.
-  bool Overflow = true;
-  const auto &LHSAP = LHS->getValue();
-  const auto &RHSAP = RHS->getValue();
-  if (Opcode == BO_Add) {
-    if (Signed)
-      Result = LHSAP.sadd_ov(RHSAP, Overflow);
-    else
-      Result = LHSAP.uadd_ov(RHSAP, Overflow);
-  } else if (Opcode == BO_Sub) {
-    if (Signed)
-      Result = LHSAP.ssub_ov(RHSAP, Overflow);
-    else
-      Result = LHSAP.usub_ov(RHSAP, Overflow);
-  } else if (Opcode == BO_Mul) {
-    if (Signed)
-      Result = LHSAP.smul_ov(RHSAP, Overflow);
-    else
-      Result = LHSAP.umul_ov(RHSAP, Overflow);
-  } else if (Opcode == BO_Div || Opcode == BO_Rem) {
-    if (Signed && !RHS->isZero())
-      Result = LHSAP.sdiv_ov(RHSAP, Overflow);
-    else
-      return false;
-  }
-  return Overflow;
-}
-
-struct BinOpInfo {
-  Value *LHS;
-  Value *RHS;
-  QualType Ty;  // Computation Type.
-  BinaryOperator::Opcode Opcode; // Opcode of BinOp to perform
-  FPOptions FPFeatures;
-  const Expr *E;      // Entire expr, for error unsupported.  May not be binop.
-
-  /// Check if the binop can result in integer overflow.
-  bool mayHaveIntegerOverflow() const {
-    // Without constant input, we can't rule out overflow.
-    auto *LHSCI = dyn_cast<llvm::ConstantInt>(LHS);
-    auto *RHSCI = dyn_cast<llvm::ConstantInt>(RHS);
-    if (!LHSCI || !RHSCI)
-      return true;
-
-    llvm::APInt Result;
-    return ::mayHaveIntegerOverflow(
-        LHSCI, RHSCI, Opcode, Ty->hasSignedIntegerRepresentation(), Result);
-  }
-
-  /// Check if the binop computes a division or a remainder.
-  bool isDivremOp() const {
-    return Opcode == BO_Div || Opcode == BO_Rem || Opcode == BO_DivAssign ||
-           Opcode == BO_RemAssign;
-  }
-
-  /// Check if the binop can result in an integer division by zero.
-  bool mayHaveIntegerDivisionByZero() const {
-    if (isDivremOp())
-      if (auto *CI = dyn_cast<llvm::ConstantInt>(RHS))
-        return CI->isZero();
-    return true;
-  }
-
-  /// Check if the binop can result in a float division by zero.
-  bool mayHaveFloatDivisionByZero() const {
-    if (isDivremOp())
-      if (auto *CFP = dyn_cast<llvm::ConstantFP>(RHS))
-        return CFP->isZero();
-    return true;
-  }
-
-  /// Check if at least one operand is a fixed point type. In such cases, this
-  /// operation did not follow usual arithmetic conversion and both operands
-  /// might not be of the same type.
-  bool isFixedPointOp() const {
-    // We cannot simply check the result type since comparison operations return
-    // an int.
-    if (const auto *BinOp = dyn_cast<BinaryOperator>(E)) {
-      QualType LHSType = BinOp->getLHS()->getType();
-      QualType RHSType = BinOp->getRHS()->getType();
-      return LHSType->isFixedPointType() || RHSType->isFixedPointType();
-    }
-    if (const auto *UnOp = dyn_cast<UnaryOperator>(E))
-      return UnOp->getSubExpr()->getType()->isFixedPointType();
-    return false;
-  }
-};
-
-static bool MustVisitNullValue(const Expr *E) {
-  // If a null pointer expression's type is the C++0x nullptr_t, then
-  // it's not necessarily a simple constant and it must be evaluated
-  // for its potential side effects.
-  return E->getType()->isNullPtrType();
-}
-
-/// If \p E is a widened promoted integer, get its base (unpromoted) type.
-static llvm::Optional<QualType> getUnwidenedIntegerType(const ASTContext &Ctx,
-                                                        const Expr *E) {
-  const Expr *Base = E->IgnoreImpCasts();
-  if (E == Base)
-    return llvm::None;
-
-  QualType BaseTy = Base->getType();
-  if (!BaseTy->isPromotableIntegerType() ||
-      Ctx.getTypeSize(BaseTy) >= Ctx.getTypeSize(E->getType()))
-    return llvm::None;
-
-  return BaseTy;
-}
-
-/// Check if \p E is a widened promoted integer.
-static bool IsWidenedIntegerOp(const ASTContext &Ctx, const Expr *E) {
-  return getUnwidenedIntegerType(Ctx, E).hasValue();
-}
-
-/// Check if we can skip the overflow check for \p Op.
-static bool CanElideOverflowCheck(const ASTContext &Ctx, const BinOpInfo &Op) {
-  assert((isa<UnaryOperator>(Op.E) || isa<BinaryOperator>(Op.E)) &&
-         "Expected a unary or binary operator");
-
-  // If the binop has constant inputs and we can prove there is no overflow,
-  // we can elide the overflow check.
-  if (!Op.mayHaveIntegerOverflow())
-    return true;
-
-  // If a unary op has a widened operand, the op cannot overflow.
-  if (const auto *UO = dyn_cast<UnaryOperator>(Op.E))
-    return !UO->canOverflow();
-
-  // We usually don't need overflow checks for binops with widened operands.
-  // Multiplication with promoted unsigned operands is a special case.
-  const auto *BO = cast<BinaryOperator>(Op.E);
-  auto OptionalLHSTy = getUnwidenedIntegerType(Ctx, BO->getLHS());
-  if (!OptionalLHSTy)
-    return false;
-
-  auto OptionalRHSTy = getUnwidenedIntegerType(Ctx, BO->getRHS());
-  if (!OptionalRHSTy)
-    return false;
-
-  QualType LHSTy = *OptionalLHSTy;
-  QualType RHSTy = *OptionalRHSTy;
-
-  // This is the simple case: binops without unsigned multiplication, and with
-  // widened operands. No overflow check is needed here.
-  if ((Op.Opcode != BO_Mul && Op.Opcode != BO_MulAssign) ||
-      !LHSTy->isUnsignedIntegerType() || !RHSTy->isUnsignedIntegerType())
-    return true;
-
-  // For unsigned multiplication the overflow check can be elided if either one
-  // of the unpromoted types are less than half the size of the promoted type.
-  unsigned PromotedSize = Ctx.getTypeSize(Op.E->getType());
-  return (2 * Ctx.getTypeSize(LHSTy)) < PromotedSize ||
-         (2 * Ctx.getTypeSize(RHSTy)) < PromotedSize;
-}
-
-class ScalarExprEmitter
-  : public StmtVisitor<ScalarExprEmitter, Value*> {
-  CodeGenFunction &CGF;
-  CGBuilderTy &Builder;
-  bool IgnoreResultAssign;
-  llvm::LLVMContext &VMContext;
-public:
-
-  ScalarExprEmitter(CodeGenFunction &cgf, bool ira=false)
-    : CGF(cgf), Builder(CGF.Builder), IgnoreResultAssign(ira),
-      VMContext(cgf.getLLVMContext()) {
-  }
-
-  //===--------------------------------------------------------------------===//
-  //                               Utilities
-  //===--------------------------------------------------------------------===//
-
-  bool TestAndClearIgnoreResultAssign() {
-    bool I = IgnoreResultAssign;
-    IgnoreResultAssign = false;
-    return I;
-  }
-
-  llvm::Type *ConvertType(QualType T) { return CGF.ConvertType(T); }
-  LValue EmitLValue(const Expr *E) { return CGF.EmitLValue(E); }
-  LValue EmitCheckedLValue(const Expr *E, CodeGenFunction::TypeCheckKind TCK) {
-    return CGF.EmitCheckedLValue(E, TCK);
-  }
-
-  void EmitBinOpCheck(ArrayRef<std::pair<Value *, SanitizerMask>> Checks,
-                      const BinOpInfo &Info);
-
-  Value *EmitLoadOfLValue(LValue LV, SourceLocation Loc) {
-    return CGF.EmitLoadOfLValue(LV, Loc).getScalarVal();
-  }
-
-  void EmitLValueAlignmentAssumption(const Expr *E, Value *V) {
-    const AlignValueAttr *AVAttr = nullptr;
-    if (const auto *DRE = dyn_cast<DeclRefExpr>(E)) {
-      const ValueDecl *VD = DRE->getDecl();
-
-      if (VD->getType()->isReferenceType()) {
-        if (const auto *TTy =
-            dyn_cast<TypedefType>(VD->getType().getNonReferenceType()))
-          AVAttr = TTy->getDecl()->getAttr<AlignValueAttr>();
-      } else {
-        // Assumptions for function parameters are emitted at the start of the
-        // function, so there is no need to repeat that here,
-        // unless the alignment-assumption sanitizer is enabled,
-        // then we prefer the assumption over alignment attribute
-        // on IR function param.
-        if (isa<ParmVarDecl>(VD) && !CGF.SanOpts.has(SanitizerKind::Alignment))
-          return;
-
-        AVAttr = VD->getAttr<AlignValueAttr>();
-      }
-    }
-
-    if (!AVAttr)
-      if (const auto *TTy =
-          dyn_cast<TypedefType>(E->getType()))
-        AVAttr = TTy->getDecl()->getAttr<AlignValueAttr>();
-
-    if (!AVAttr)
-      return;
-
-    Value *AlignmentValue = CGF.EmitScalarExpr(AVAttr->getAlignment());
-    llvm::ConstantInt *AlignmentCI = cast<llvm::ConstantInt>(AlignmentValue);
-    CGF.emitAlignmentAssumption(V, E, AVAttr->getLocation(), AlignmentCI);
-  }
-
-  /// EmitLoadOfLValue - Given an expression with complex type that represents a
-  /// value l-value, this method emits the address of the l-value, then loads
-  /// and returns the result.
-  Value *EmitLoadOfLValue(const Expr *E) {
-    Value *V = EmitLoadOfLValue(EmitCheckedLValue(E, CodeGenFunction::TCK_Load),
-                                E->getExprLoc());
-
-    EmitLValueAlignmentAssumption(E, V);
-    return V;
-  }
-
-  /// EmitConversionToBool - Convert the specified expression value to a
-  /// boolean (i1) truth value.  This is equivalent to "Val != 0".
-  Value *EmitConversionToBool(Value *Src, QualType DstTy);
-
-  /// Emit a check that a conversion from a floating-point type does not
-  /// overflow.
-  void EmitFloatConversionCheck(Value *OrigSrc, QualType OrigSrcType,
-                                Value *Src, QualType SrcType, QualType DstType,
-                                llvm::Type *DstTy, SourceLocation Loc);
-
-  /// Known implicit conversion check kinds.
-  /// Keep in sync with the enum of the same name in ubsan_handlers.h
-  enum ImplicitConversionCheckKind : unsigned char {
-    ICCK_IntegerTruncation = 0, // Legacy, was only used by clang 7.
-    ICCK_UnsignedIntegerTruncation = 1,
-    ICCK_SignedIntegerTruncation = 2,
-    ICCK_IntegerSignChange = 3,
-    ICCK_SignedIntegerTruncationOrSignChange = 4,
-  };
-
-  /// Emit a check that an [implicit] truncation of an integer  does not
-  /// discard any bits. It is not UB, so we use the value after truncation.
-  void EmitIntegerTruncationCheck(Value *Src, QualType SrcType, Value *Dst,
-                                  QualType DstType, SourceLocation Loc);
-
-  /// Emit a check that an [implicit] conversion of an integer does not change
-  /// the sign of the value. It is not UB, so we use the value after conversion.
-  /// NOTE: Src and Dst may be the exact same value! (point to the same thing)
-  void EmitIntegerSignChangeCheck(Value *Src, QualType SrcType, Value *Dst,
-                                  QualType DstType, SourceLocation Loc);
-
-  /// Emit a conversion from the specified type to the specified destination
-  /// type, both of which are LLVM scalar types.
-  struct ScalarConversionOpts {
-    bool TreatBooleanAsSigned;
-    bool EmitImplicitIntegerTruncationChecks;
-    bool EmitImplicitIntegerSignChangeChecks;
-
-    ScalarConversionOpts()
-        : TreatBooleanAsSigned(false),
-          EmitImplicitIntegerTruncationChecks(false),
-          EmitImplicitIntegerSignChangeChecks(false) {}
-
-    ScalarConversionOpts(clang::SanitizerSet SanOpts)
-        : TreatBooleanAsSigned(false),
-          EmitImplicitIntegerTruncationChecks(
-              SanOpts.hasOneOf(SanitizerKind::ImplicitIntegerTruncation)),
-          EmitImplicitIntegerSignChangeChecks(
-              SanOpts.has(SanitizerKind::ImplicitIntegerSignChange)) {}
-  };
-  Value *EmitScalarCast(Value *Src, QualType SrcType, QualType DstType,
-                        llvm::Type *SrcTy, llvm::Type *DstTy,
-                        ScalarConversionOpts Opts);
-  Value *
-  EmitScalarConversion(Value *Src, QualType SrcTy, QualType DstTy,
-                       SourceLocation Loc,
-                       ScalarConversionOpts Opts = ScalarConversionOpts());
-
-  /// Convert between either a fixed point and other fixed point or fixed point
-  /// and an integer.
-  Value *EmitFixedPointConversion(Value *Src, QualType SrcTy, QualType DstTy,
-                                  SourceLocation Loc);
-
-  /// Emit a conversion from the specified complex type to the specified
-  /// destination type, where the destination type is an LLVM scalar type.
-  Value *EmitComplexToScalarConversion(CodeGenFunction::ComplexPairTy Src,
-                                       QualType SrcTy, QualType DstTy,
-                                       SourceLocation Loc);
-
-  /// EmitNullValue - Emit a value that corresponds to null for the given type.
-  Value *EmitNullValue(QualType Ty);
-
-  /// EmitFloatToBoolConversion - Perform an FP to boolean conversion.
-  Value *EmitFloatToBoolConversion(Value *V) {
-    // Compare against 0.0 for fp scalars.
-    llvm::Value *Zero = llvm::Constant::getNullValue(V->getType());
-    return Builder.CreateFCmpUNE(V, Zero, "tobool");
-  }
-
-  /// EmitPointerToBoolConversion - Perform a pointer to boolean conversion.
-  Value *EmitPointerToBoolConversion(Value *V, QualType QT) {
-    Value *Zero = CGF.CGM.getNullPointer(cast<llvm::PointerType>(V->getType()), QT);
-
-    return Builder.CreateICmpNE(V, Zero, "tobool");
-  }
-
-  Value *EmitIntToBoolConversion(Value *V) {
-    // Because of the type rules of C, we often end up computing a
-    // logical value, then zero extending it to int, then wanting it
-    // as a logical value again.  Optimize this common case.
-    if (llvm::ZExtInst *ZI = dyn_cast<llvm::ZExtInst>(V)) {
-      if (ZI->getOperand(0)->getType() == Builder.getInt1Ty()) {
-        Value *Result = ZI->getOperand(0);
-        // If there aren't any more uses, zap the instruction to save space.
-        // Note that there can be more uses, for example if this
-        // is the result of an assignment.
-        if (ZI->use_empty())
-          ZI->eraseFromParent();
-        return Result;
-      }
-    }
-
-    return Builder.CreateIsNotNull(V, "tobool");
-  }
-
-  //===--------------------------------------------------------------------===//
-  //                            Visitor Methods
-  //===--------------------------------------------------------------------===//
-
-  Value *Visit(Expr *E) {
-    ApplyDebugLocation DL(CGF, E);
-    return StmtVisitor<ScalarExprEmitter, Value*>::Visit(E);
-  }
-
-  Value *VisitStmt(Stmt *S) {
-    S->dump(llvm::errs(), CGF.getContext());
-    llvm_unreachable("Stmt can't have complex result type!");
-  }
-  Value *VisitExpr(Expr *S);
-
-  Value *VisitConstantExpr(ConstantExpr *E) {
-    // A constant expression of type 'void' generates no code and produces no
-    // value.
-    if (E->getType()->isVoidType())
-      return nullptr;
-
-    if (Value *Result = ConstantEmitter(CGF).tryEmitConstantExpr(E)) {
-      if (E->isGLValue())
-        return CGF.Builder.CreateLoad(Address(
-            Result, CGF.getContext().getTypeAlignInChars(E->getType())));
-      return Result;
-    }
-    return Visit(E->getSubExpr());
-  }
-  Value *VisitParenExpr(ParenExpr *PE) {
-    return Visit(PE->getSubExpr());
-  }
-  Value *VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *E) {
-    return Visit(E->getReplacement());
-  }
-  Value *VisitGenericSelectionExpr(GenericSelectionExpr *GE) {
-    return Visit(GE->getResultExpr());
-  }
-  Value *VisitCoawaitExpr(CoawaitExpr *S) {
-    return CGF.EmitCoawaitExpr(*S).getScalarVal();
-  }
-  Value *VisitCoyieldExpr(CoyieldExpr *S) {
-    return CGF.EmitCoyieldExpr(*S).getScalarVal();
-  }
-  Value *VisitUnaryCoawait(const UnaryOperator *E) {
-    return Visit(E->getSubExpr());
-  }
-
-  // Leaves.
-  Value *VisitIntegerLiteral(const IntegerLiteral *E) {
-    return Builder.getInt(E->getValue());
-  }
-  Value *VisitFixedPointLiteral(const FixedPointLiteral *E) {
-    return Builder.getInt(E->getValue());
-  }
-  Value *VisitFloatingLiteral(const FloatingLiteral *E) {
-    return llvm::ConstantFP::get(VMContext, E->getValue());
-  }
-  Value *VisitCharacterLiteral(const CharacterLiteral *E) {
-    return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue());
-  }
-  Value *VisitObjCBoolLiteralExpr(const ObjCBoolLiteralExpr *E) {
-    return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue());
-  }
-  Value *VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) {
-    return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue());
-  }
-  Value *VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) {
-    return EmitNullValue(E->getType());
-  }
-  Value *VisitGNUNullExpr(const GNUNullExpr *E) {
-    return EmitNullValue(E->getType());
-  }
-  Value *VisitOffsetOfExpr(OffsetOfExpr *E);
-  Value *VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E);
-  Value *VisitAddrLabelExpr(const AddrLabelExpr *E) {
-    llvm::Value *V = CGF.GetAddrOfLabel(E->getLabel());
-    return Builder.CreateBitCast(V, ConvertType(E->getType()));
-  }
-
-  Value *VisitSizeOfPackExpr(SizeOfPackExpr *E) {
-    return llvm::ConstantInt::get(ConvertType(E->getType()),E->getPackLength());
-  }
-
-  Value *VisitPseudoObjectExpr(PseudoObjectExpr *E) {
-    return CGF.EmitPseudoObjectRValue(E).getScalarVal();
-  }
-
-  Value *VisitSYCLUniqueStableNameExpr(SYCLUniqueStableNameExpr *E);
-
-  Value *VisitOpaqueValueExpr(OpaqueValueExpr *E) {
-    if (E->isGLValue())
-      return EmitLoadOfLValue(CGF.getOrCreateOpaqueLValueMapping(E),
-                              E->getExprLoc());
-
-    // Otherwise, assume the mapping is the scalar directly.
-    return CGF.getOrCreateOpaqueRValueMapping(E).getScalarVal();
-  }
-
-  // l-values.
-  Value *VisitDeclRefExpr(DeclRefExpr *E) {
-    if (CodeGenFunction::ConstantEmission Constant = CGF.tryEmitAsConstant(E))
-      return CGF.emitScalarConstant(Constant, E);
-    return EmitLoadOfLValue(E);
-  }
-
-  Value *VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
-    return CGF.EmitObjCSelectorExpr(E);
-  }
-  Value *VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
-    return CGF.EmitObjCProtocolExpr(E);
-  }
-  Value *VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
-    return EmitLoadOfLValue(E);
-  }
-  Value *VisitObjCMessageExpr(ObjCMessageExpr *E) {
-    if (E->getMethodDecl() &&
-        E->getMethodDecl()->getReturnType()->isReferenceType())
-      return EmitLoadOfLValue(E);
-    return CGF.EmitObjCMessageExpr(E).getScalarVal();
-  }
-
-  Value *VisitObjCIsaExpr(ObjCIsaExpr *E) {
-    LValue LV = CGF.EmitObjCIsaExpr(E);
-    Value *V = CGF.EmitLoadOfLValue(LV, E->getExprLoc()).getScalarVal();
-    return V;
-  }
-
-  Value *VisitObjCAvailabilityCheckExpr(ObjCAvailabilityCheckExpr *E) {
-    VersionTuple Version = E->getVersion();
-
-    // If we're checking for a platform older than our minimum deployment
-    // target, we can fold the check away.
-    if (Version <= CGF.CGM.getTarget().getPlatformMinVersion())
-      return llvm::ConstantInt::get(Builder.getInt1Ty(), 1);
-
-    return CGF.EmitBuiltinAvailable(Version);
-  }
-
-  Value *VisitArraySubscriptExpr(ArraySubscriptExpr *E);
-  Value *VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E);
-  Value *VisitShuffleVectorExpr(ShuffleVectorExpr *E);
-  Value *VisitConvertVectorExpr(ConvertVectorExpr *E);
-  Value *VisitMemberExpr(MemberExpr *E);
-  Value *VisitExtVectorElementExpr(Expr *E) { return EmitLoadOfLValue(E); }
-  Value *VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
-    // Strictly speaking, we shouldn't be calling EmitLoadOfLValue, which
-    // transitively calls EmitCompoundLiteralLValue, here in C++ since compound
-    // literals aren't l-values in C++. We do so simply because that's the
-    // cleanest way to handle compound literals in C++.
-    // See the discussion here: https://reviews.llvm.org/D64464
-    return EmitLoadOfLValue(E);
-  }
-
-  Value *VisitInitListExpr(InitListExpr *E);
-
-  Value *VisitArrayInitIndexExpr(ArrayInitIndexExpr *E) {
-    assert(CGF.getArrayInitIndex() &&
-           "ArrayInitIndexExpr not inside an ArrayInitLoopExpr?");
-    return CGF.getArrayInitIndex();
-  }
-
-  Value *VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) {
-    return EmitNullValue(E->getType());
-  }
-  Value *VisitExplicitCastExpr(ExplicitCastExpr *E) {
-    CGF.CGM.EmitExplicitCastExprType(E, &CGF);
-    return VisitCastExpr(E);
-  }
-  Value *VisitCastExpr(CastExpr *E);
-
-  Value *VisitCallExpr(const CallExpr *E) {
-    if (E->getCallReturnType(CGF.getContext())->isReferenceType())
-      return EmitLoadOfLValue(E);
-
-    Value *V = CGF.EmitCallExpr(E).getScalarVal();
-
-    EmitLValueAlignmentAssumption(E, V);
-    return V;
-  }
-
-  Value *VisitStmtExpr(const StmtExpr *E);
-
-  // Unary Operators.
-  Value *VisitUnaryPostDec(const UnaryOperator *E) {
-    LValue LV = EmitLValue(E->getSubExpr());
-    return EmitScalarPrePostIncDec(E, LV, false, false);
-  }
-  Value *VisitUnaryPostInc(const UnaryOperator *E) {
-    LValue LV = EmitLValue(E->getSubExpr());
-    return EmitScalarPrePostIncDec(E, LV, true, false);
-  }
-  Value *VisitUnaryPreDec(const UnaryOperator *E) {
-    LValue LV = EmitLValue(E->getSubExpr());
-    return EmitScalarPrePostIncDec(E, LV, false, true);
-  }
-  Value *VisitUnaryPreInc(const UnaryOperator *E) {
-    LValue LV = EmitLValue(E->getSubExpr());
-    return EmitScalarPrePostIncDec(E, LV, true, true);
-  }
-
-  llvm::Value *EmitIncDecConsiderOverflowBehavior(const UnaryOperator *E,
-                                                  llvm::Value *InVal,
-                                                  bool IsInc);
-
-  llvm::Value *EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
-                                       bool isInc, bool isPre);
-
-
-  Value *VisitUnaryAddrOf(const UnaryOperator *E) {
-    if (isa<MemberPointerType>(E->getType())) // never sugared
-      return CGF.CGM.getMemberPointerConstant(E);
-
-    return EmitLValue(E->getSubExpr()).getPointer(CGF);
-  }
-  Value *VisitUnaryDeref(const UnaryOperator *E) {
-    if (E->getType()->isVoidType())
-      return Visit(E->getSubExpr()); // the actual value should be unused
-    return EmitLoadOfLValue(E);
-  }
-  Value *VisitUnaryPlus(const UnaryOperator *E) {
-    // This differs from gcc, though, most likely due to a bug in gcc.
-    TestAndClearIgnoreResultAssign();
-    return Visit(E->getSubExpr());
-  }
-  Value *VisitUnaryMinus    (const UnaryOperator *E);
-  Value *VisitUnaryNot      (const UnaryOperator *E);
-  Value *VisitUnaryLNot     (const UnaryOperator *E);
-  Value *VisitUnaryReal     (const UnaryOperator *E);
-  Value *VisitUnaryImag     (const UnaryOperator *E);
-  Value *VisitUnaryExtension(const UnaryOperator *E) {
-    return Visit(E->getSubExpr());
-  }
-
-  // C++
-  Value *VisitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E) {
-    return EmitLoadOfLValue(E);
-  }
-  Value *VisitSourceLocExpr(SourceLocExpr *SLE) {
-    auto &Ctx = CGF.getContext();
-    APValue Evaluated =
-        SLE->EvaluateInContext(Ctx, CGF.CurSourceLocExprScope.getDefaultExpr());
-    return ConstantEmitter(CGF).emitAbstract(SLE->getLocation(), Evaluated,
-                                             SLE->getType());
-  }
-
-  Value *VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) {
-    CodeGenFunction::CXXDefaultArgExprScope Scope(CGF, DAE);
-    return Visit(DAE->getExpr());
-  }
-  Value *VisitCXXDefaultInitExpr(CXXDefaultInitExpr *DIE) {
-    CodeGenFunction::CXXDefaultInitExprScope Scope(CGF, DIE);
-    return Visit(DIE->getExpr());
-  }
-  Value *VisitCXXThisExpr(CXXThisExpr *TE) {
-    return CGF.LoadCXXThis();
-  }
-
-  Value *VisitExprWithCleanups(ExprWithCleanups *E);
-  Value *VisitCXXNewExpr(const CXXNewExpr *E) {
-    return CGF.EmitCXXNewExpr(E);
-  }
-  Value *VisitCXXDeleteExpr(const CXXDeleteExpr *E) {
-    CGF.EmitCXXDeleteExpr(E);
-    return nullptr;
-  }
-
-  Value *VisitTypeTraitExpr(const TypeTraitExpr *E) {
-    return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue());
-  }
-
-  Value *VisitConceptSpecializationExpr(const ConceptSpecializationExpr *E) {
-    return Builder.getInt1(E->isSatisfied());
-  }
-
-  Value *VisitRequiresExpr(const RequiresExpr *E) {
-    return Builder.getInt1(E->isSatisfied());
-  }
-
-  Value *VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) {
-    return llvm::ConstantInt::get(Builder.getInt32Ty(), E->getValue());
-  }
-
-  Value *VisitExpressionTraitExpr(const ExpressionTraitExpr *E) {
-    return llvm::ConstantInt::get(Builder.getInt1Ty(), E->getValue());
-  }
-
-  Value *VisitCXXPseudoDestructorExpr(const CXXPseudoDestructorExpr *E) {
-    // C++ [expr.pseudo]p1:
-    //   The result shall only be used as the operand for the function call
-    //   operator (), and the result of such a call has type void. The only
-    //   effect is the evaluation of the postfix-expression before the dot or
-    //   arrow.
-    CGF.EmitScalarExpr(E->getBase());
-    return nullptr;
-  }
-
-  Value *VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) {
-    return EmitNullValue(E->getType());
-  }
-
-  Value *VisitCXXThrowExpr(const CXXThrowExpr *E) {
-    CGF.EmitCXXThrowExpr(E);
-    return nullptr;
-  }
-
-  Value *VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) {
-    return Builder.getInt1(E->getValue());
-  }
-
-  // Binary Operators.
-  Value *EmitMul(const BinOpInfo &Ops) {
-    if (Ops.Ty->isSignedIntegerOrEnumerationType()) {
-      switch (CGF.getLangOpts().getSignedOverflowBehavior()) {
-      case LangOptions::SOB_Defined:
-        return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul");
-      case LangOptions::SOB_Undefined:
-        if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow))
-          return Builder.CreateNSWMul(Ops.LHS, Ops.RHS, "mul");
-        LLVM_FALLTHROUGH;
-      case LangOptions::SOB_Trapping:
-        if (CanElideOverflowCheck(CGF.getContext(), Ops))
-          return Builder.CreateNSWMul(Ops.LHS, Ops.RHS, "mul");
-        return EmitOverflowCheckedBinOp(Ops);
-      }
-    }
-
-    if (Ops.Ty->isConstantMatrixType()) {
-      llvm::MatrixBuilder<CGBuilderTy> MB(Builder);
-      // We need to check the types of the operands of the operator to get the
-      // correct matrix dimensions.
-      auto *BO = cast<BinaryOperator>(Ops.E);
-      auto *LHSMatTy = dyn_cast<ConstantMatrixType>(
-          BO->getLHS()->getType().getCanonicalType());
-      auto *RHSMatTy = dyn_cast<ConstantMatrixType>(
-          BO->getRHS()->getType().getCanonicalType());
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, Ops.FPFeatures);
-      if (LHSMatTy && RHSMatTy)
-        return MB.CreateMatrixMultiply(Ops.LHS, Ops.RHS, LHSMatTy->getNumRows(),
-                                       LHSMatTy->getNumColumns(),
-                                       RHSMatTy->getNumColumns());
-      return MB.CreateScalarMultiply(Ops.LHS, Ops.RHS);
-    }
-
-    if (Ops.Ty->isUnsignedIntegerType() &&
-        CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow) &&
-        !CanElideOverflowCheck(CGF.getContext(), Ops))
-      return EmitOverflowCheckedBinOp(Ops);
-
-    if (Ops.LHS->getType()->isFPOrFPVectorTy()) {
-      //  Preserve the old values
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, Ops.FPFeatures);
-      return Builder.CreateFMul(Ops.LHS, Ops.RHS, "mul");
-    }
-    if (Ops.isFixedPointOp())
-      return EmitFixedPointBinOp(Ops);
-    return Builder.CreateMul(Ops.LHS, Ops.RHS, "mul");
-  }
-  /// Create a binary op that checks for overflow.
-  /// Currently only supports +, - and *.
-  Value *EmitOverflowCheckedBinOp(const BinOpInfo &Ops);
-
-  // Check for undefined division and modulus behaviors.
-  void EmitUndefinedBehaviorIntegerDivAndRemCheck(const BinOpInfo &Ops,
-                                                  llvm::Value *Zero,bool isDiv);
-  // Common helper for getting how wide LHS of shift is.
-  static Value *GetWidthMinusOneValue(Value* LHS,Value* RHS);
-
-  // Used for shifting constraints for OpenCL, do mask for powers of 2, URem for
-  // non powers of two.
-  Value *ConstrainShiftValue(Value *LHS, Value *RHS, const Twine &Name);
-
-  Value *EmitDiv(const BinOpInfo &Ops);
-  Value *EmitRem(const BinOpInfo &Ops);
-  Value *EmitAdd(const BinOpInfo &Ops);
-  Value *EmitSub(const BinOpInfo &Ops);
-  Value *EmitShl(const BinOpInfo &Ops);
-  Value *EmitShr(const BinOpInfo &Ops);
-  Value *EmitAnd(const BinOpInfo &Ops) {
-    return Builder.CreateAnd(Ops.LHS, Ops.RHS, "and");
-  }
-  Value *EmitXor(const BinOpInfo &Ops) {
-    return Builder.CreateXor(Ops.LHS, Ops.RHS, "xor");
-  }
-  Value *EmitOr (const BinOpInfo &Ops) {
-    return Builder.CreateOr(Ops.LHS, Ops.RHS, "or");
-  }
-
-  // Helper functions for fixed point binary operations.
-  Value *EmitFixedPointBinOp(const BinOpInfo &Ops);
-
-  BinOpInfo EmitBinOps(const BinaryOperator *E);
-  LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E,
-                            Value *(ScalarExprEmitter::*F)(const BinOpInfo &),
-                                  Value *&Result);
-
-  Value *EmitCompoundAssign(const CompoundAssignOperator *E,
-                            Value *(ScalarExprEmitter::*F)(const BinOpInfo &));
-
-  // Binary operators and binary compound assignment operators.
-#define HANDLEBINOP(OP) \
-  Value *VisitBin ## OP(const BinaryOperator *E) {                         \
-    return Emit ## OP(EmitBinOps(E));                                      \
-  }                                                                        \
-  Value *VisitBin ## OP ## Assign(const CompoundAssignOperator *E) {       \
-    return EmitCompoundAssign(E, &ScalarExprEmitter::Emit ## OP);          \
-  }
-  HANDLEBINOP(Mul)
-  HANDLEBINOP(Div)
-  HANDLEBINOP(Rem)
-  HANDLEBINOP(Add)
-  HANDLEBINOP(Sub)
-  HANDLEBINOP(Shl)
-  HANDLEBINOP(Shr)
-  HANDLEBINOP(And)
-  HANDLEBINOP(Xor)
-  HANDLEBINOP(Or)
-#undef HANDLEBINOP
-
-  // Comparisons.
-  Value *EmitCompare(const BinaryOperator *E, llvm::CmpInst::Predicate UICmpOpc,
-                     llvm::CmpInst::Predicate SICmpOpc,
-                     llvm::CmpInst::Predicate FCmpOpc, bool IsSignaling);
-#define VISITCOMP(CODE, UI, SI, FP, SIG) \
-    Value *VisitBin##CODE(const BinaryOperator *E) { \
-      return EmitCompare(E, llvm::ICmpInst::UI, llvm::ICmpInst::SI, \
-                         llvm::FCmpInst::FP, SIG); }
-  VISITCOMP(LT, ICMP_ULT, ICMP_SLT, FCMP_OLT, true)
-  VISITCOMP(GT, ICMP_UGT, ICMP_SGT, FCMP_OGT, true)
-  VISITCOMP(LE, ICMP_ULE, ICMP_SLE, FCMP_OLE, true)
-  VISITCOMP(GE, ICMP_UGE, ICMP_SGE, FCMP_OGE, true)
-  VISITCOMP(EQ, ICMP_EQ , ICMP_EQ , FCMP_OEQ, false)
-  VISITCOMP(NE, ICMP_NE , ICMP_NE , FCMP_UNE, false)
-#undef VISITCOMP
-
-  Value *VisitBinAssign     (const BinaryOperator *E);
-
-  Value *VisitBinLAnd       (const BinaryOperator *E);
-  Value *VisitBinLOr        (const BinaryOperator *E);
-  Value *VisitBinComma      (const BinaryOperator *E);
-
-  Value *VisitBinPtrMemD(const Expr *E) { return EmitLoadOfLValue(E); }
-  Value *VisitBinPtrMemI(const Expr *E) { return EmitLoadOfLValue(E); }
-
-  Value *VisitCXXRewrittenBinaryOperator(CXXRewrittenBinaryOperator *E) {
-    return Visit(E->getSemanticForm());
-  }
-
-  // Other Operators.
-  Value *VisitBlockExpr(const BlockExpr *BE);
-  Value *VisitAbstractConditionalOperator(const AbstractConditionalOperator *);
-  Value *VisitChooseExpr(ChooseExpr *CE);
-  Value *VisitVAArgExpr(VAArgExpr *VE);
-  Value *VisitObjCStringLiteral(const ObjCStringLiteral *E) {
-    return CGF.EmitObjCStringLiteral(E);
-  }
-  Value *VisitObjCBoxedExpr(ObjCBoxedExpr *E) {
-    return CGF.EmitObjCBoxedExpr(E);
-  }
-  Value *VisitObjCArrayLiteral(ObjCArrayLiteral *E) {
-    return CGF.EmitObjCArrayLiteral(E);
-  }
-  Value *VisitObjCDictionaryLiteral(ObjCDictionaryLiteral *E) {
-    return CGF.EmitObjCDictionaryLiteral(E);
-  }
-  Value *VisitAsTypeExpr(AsTypeExpr *CE);
-  Value *VisitAtomicExpr(AtomicExpr *AE);
-};
-}  // end anonymous namespace.
-
-//===----------------------------------------------------------------------===//
-//                                Utilities
-//===----------------------------------------------------------------------===//
-
-/// EmitConversionToBool - Convert the specified expression value to a
-/// boolean (i1) truth value.  This is equivalent to "Val != 0".
-Value *ScalarExprEmitter::EmitConversionToBool(Value *Src, QualType SrcType) {
-  assert(SrcType.isCanonical() && "EmitScalarConversion strips typedefs");
-
-  if (SrcType->isRealFloatingType())
-    return EmitFloatToBoolConversion(Src);
-
-  if (const MemberPointerType *MPT = dyn_cast<MemberPointerType>(SrcType))
-    return CGF.CGM.getCXXABI().EmitMemberPointerIsNotNull(CGF, Src, MPT);
-
-  assert((SrcType->isIntegerType() || isa<llvm::PointerType>(Src->getType())) &&
-         "Unknown scalar type to convert");
-
-  if (isa<llvm::IntegerType>(Src->getType()))
-    return EmitIntToBoolConversion(Src);
-
-  assert(isa<llvm::PointerType>(Src->getType()));
-  return EmitPointerToBoolConversion(Src, SrcType);
-}
-
-void ScalarExprEmitter::EmitFloatConversionCheck(
-    Value *OrigSrc, QualType OrigSrcType, Value *Src, QualType SrcType,
-    QualType DstType, llvm::Type *DstTy, SourceLocation Loc) {
-  assert(SrcType->isFloatingType() && "not a conversion from floating point");
-  if (!isa<llvm::IntegerType>(DstTy))
-    return;
-
-  CodeGenFunction::SanitizerScope SanScope(&CGF);
-  using llvm::APFloat;
-  using llvm::APSInt;
-
-  llvm::Value *Check = nullptr;
-  const llvm::fltSemantics &SrcSema =
-    CGF.getContext().getFloatTypeSemantics(OrigSrcType);
-
-  // Floating-point to integer. This has undefined behavior if the source is
-  // +-Inf, NaN, or doesn't fit into the destination type (after truncation
-  // to an integer).
-  unsigned Width = CGF.getContext().getIntWidth(DstType);
-  bool Unsigned = DstType->isUnsignedIntegerOrEnumerationType();
-
-  APSInt Min = APSInt::getMinValue(Width, Unsigned);
-  APFloat MinSrc(SrcSema, APFloat::uninitialized);
-  if (MinSrc.convertFromAPInt(Min, !Unsigned, APFloat::rmTowardZero) &
-      APFloat::opOverflow)
-    // Don't need an overflow check for lower bound. Just check for
-    // -Inf/NaN.
-    MinSrc = APFloat::getInf(SrcSema, true);
-  else
-    // Find the largest value which is too small to represent (before
-    // truncation toward zero).
-    MinSrc.subtract(APFloat(SrcSema, 1), APFloat::rmTowardNegative);
-
-  APSInt Max = APSInt::getMaxValue(Width, Unsigned);
-  APFloat MaxSrc(SrcSema, APFloat::uninitialized);
-  if (MaxSrc.convertFromAPInt(Max, !Unsigned, APFloat::rmTowardZero) &
-      APFloat::opOverflow)
-    // Don't need an overflow check for upper bound. Just check for
-    // +Inf/NaN.
-    MaxSrc = APFloat::getInf(SrcSema, false);
-  else
-    // Find the smallest value which is too large to represent (before
-    // truncation toward zero).
-    MaxSrc.add(APFloat(SrcSema, 1), APFloat::rmTowardPositive);
-
-  // If we're converting from __half, convert the range to float to match
-  // the type of src.
-  if (OrigSrcType->isHalfType()) {
-    const llvm::fltSemantics &Sema =
-      CGF.getContext().getFloatTypeSemantics(SrcType);
-    bool IsInexact;
-    MinSrc.convert(Sema, APFloat::rmTowardZero, &IsInexact);
-    MaxSrc.convert(Sema, APFloat::rmTowardZero, &IsInexact);
-  }
-
-  llvm::Value *GE =
-    Builder.CreateFCmpOGT(Src, llvm::ConstantFP::get(VMContext, MinSrc));
-  llvm::Value *LE =
-    Builder.CreateFCmpOLT(Src, llvm::ConstantFP::get(VMContext, MaxSrc));
-  Check = Builder.CreateAnd(GE, LE);
-
-  llvm::Constant *StaticArgs[] = {CGF.EmitCheckSourceLocation(Loc),
-                                  CGF.EmitCheckTypeDescriptor(OrigSrcType),
-                                  CGF.EmitCheckTypeDescriptor(DstType)};
-  CGF.EmitCheck(std::make_pair(Check, SanitizerKind::FloatCastOverflow),
-                SanitizerHandler::FloatCastOverflow, StaticArgs, OrigSrc);
-}
-
-// Should be called within CodeGenFunction::SanitizerScope RAII scope.
-// Returns 'i1 false' when the truncation Src -> Dst was lossy.
-static std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
-                 std::pair<llvm::Value *, SanitizerMask>>
-EmitIntegerTruncationCheckHelper(Value *Src, QualType SrcType, Value *Dst,
-                                 QualType DstType, CGBuilderTy &Builder) {
-  llvm::Type *SrcTy = Src->getType();
-  llvm::Type *DstTy = Dst->getType();
-  (void)DstTy; // Only used in assert()
-
-  // This should be truncation of integral types.
-  assert(Src != Dst);
-  assert(SrcTy->getScalarSizeInBits() > Dst->getType()->getScalarSizeInBits());
-  assert(isa<llvm::IntegerType>(SrcTy) && isa<llvm::IntegerType>(DstTy) &&
-         "non-integer llvm type");
-
-  bool SrcSigned = SrcType->isSignedIntegerOrEnumerationType();
-  bool DstSigned = DstType->isSignedIntegerOrEnumerationType();
-
-  // If both (src and dst) types are unsigned, then it's an unsigned truncation.
-  // Else, it is a signed truncation.
-  ScalarExprEmitter::ImplicitConversionCheckKind Kind;
-  SanitizerMask Mask;
-  if (!SrcSigned && !DstSigned) {
-    Kind = ScalarExprEmitter::ICCK_UnsignedIntegerTruncation;
-    Mask = SanitizerKind::ImplicitUnsignedIntegerTruncation;
-  } else {
-    Kind = ScalarExprEmitter::ICCK_SignedIntegerTruncation;
-    Mask = SanitizerKind::ImplicitSignedIntegerTruncation;
-  }
-
-  llvm::Value *Check = nullptr;
-  // 1. Extend the truncated value back to the same width as the Src.
-  Check = Builder.CreateIntCast(Dst, SrcTy, DstSigned, "anyext");
-  // 2. Equality-compare with the original source value
-  Check = Builder.CreateICmpEQ(Check, Src, "truncheck");
-  // If the comparison result is 'i1 false', then the truncation was lossy.
-  return std::make_pair(Kind, std::make_pair(Check, Mask));
-}
-
-static bool PromotionIsPotentiallyEligibleForImplicitIntegerConversionCheck(
-    QualType SrcType, QualType DstType) {
-  return SrcType->isIntegerType() && DstType->isIntegerType();
-}
-
-void ScalarExprEmitter::EmitIntegerTruncationCheck(Value *Src, QualType SrcType,
-                                                   Value *Dst, QualType DstType,
-                                                   SourceLocation Loc) {
-  if (!CGF.SanOpts.hasOneOf(SanitizerKind::ImplicitIntegerTruncation))
-    return;
-
-  // We only care about int->int conversions here.
-  // We ignore conversions to/from pointer and/or bool.
-  if (!PromotionIsPotentiallyEligibleForImplicitIntegerConversionCheck(SrcType,
-                                                                       DstType))
-    return;
-
-  unsigned SrcBits = Src->getType()->getScalarSizeInBits();
-  unsigned DstBits = Dst->getType()->getScalarSizeInBits();
-  // This must be truncation. Else we do not care.
-  if (SrcBits <= DstBits)
-    return;
-
-  assert(!DstType->isBooleanType() && "we should not get here with booleans.");
-
-  // If the integer sign change sanitizer is enabled,
-  // and we are truncating from larger unsigned type to smaller signed type,
-  // let that next sanitizer deal with it.
-  bool SrcSigned = SrcType->isSignedIntegerOrEnumerationType();
-  bool DstSigned = DstType->isSignedIntegerOrEnumerationType();
-  if (CGF.SanOpts.has(SanitizerKind::ImplicitIntegerSignChange) &&
-      (!SrcSigned && DstSigned))
-    return;
-
-  CodeGenFunction::SanitizerScope SanScope(&CGF);
-
-  std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
-            std::pair<llvm::Value *, SanitizerMask>>
-      Check =
-          EmitIntegerTruncationCheckHelper(Src, SrcType, Dst, DstType, Builder);
-  // If the comparison result is 'i1 false', then the truncation was lossy.
-
-  // Do we care about this type of truncation?
-  if (!CGF.SanOpts.has(Check.second.second))
-    return;
-
-  llvm::Constant *StaticArgs[] = {
-      CGF.EmitCheckSourceLocation(Loc), CGF.EmitCheckTypeDescriptor(SrcType),
-      CGF.EmitCheckTypeDescriptor(DstType),
-      llvm::ConstantInt::get(Builder.getInt8Ty(), Check.first)};
-  CGF.EmitCheck(Check.second, SanitizerHandler::ImplicitConversion, StaticArgs,
-                {Src, Dst});
-}
-
-// Should be called within CodeGenFunction::SanitizerScope RAII scope.
-// Returns 'i1 false' when the conversion Src -> Dst changed the sign.
-static std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
-                 std::pair<llvm::Value *, SanitizerMask>>
-EmitIntegerSignChangeCheckHelper(Value *Src, QualType SrcType, Value *Dst,
-                                 QualType DstType, CGBuilderTy &Builder) {
-  llvm::Type *SrcTy = Src->getType();
-  llvm::Type *DstTy = Dst->getType();
-
-  assert(isa<llvm::IntegerType>(SrcTy) && isa<llvm::IntegerType>(DstTy) &&
-         "non-integer llvm type");
-
-  bool SrcSigned = SrcType->isSignedIntegerOrEnumerationType();
-  bool DstSigned = DstType->isSignedIntegerOrEnumerationType();
-  (void)SrcSigned; // Only used in assert()
-  (void)DstSigned; // Only used in assert()
-  unsigned SrcBits = SrcTy->getScalarSizeInBits();
-  unsigned DstBits = DstTy->getScalarSizeInBits();
-  (void)SrcBits; // Only used in assert()
-  (void)DstBits; // Only used in assert()
-
-  assert(((SrcBits != DstBits) || (SrcSigned != DstSigned)) &&
-         "either the widths should be different, or the signednesses.");
-
-  // NOTE: zero value is considered to be non-negative.
-  auto EmitIsNegativeTest = [&Builder](Value *V, QualType VType,
-                                       const char *Name) -> Value * {
-    // Is this value a signed type?
-    bool VSigned = VType->isSignedIntegerOrEnumerationType();
-    llvm::Type *VTy = V->getType();
-    if (!VSigned) {
-      // If the value is unsigned, then it is never negative.
-      // FIXME: can we encounter non-scalar VTy here?
-      return llvm::ConstantInt::getFalse(VTy->getContext());
-    }
-    // Get the zero of the same type with which we will be comparing.
-    llvm::Constant *Zero = llvm::ConstantInt::get(VTy, 0);
-    // %V.isnegative = icmp slt %V, 0
-    // I.e is %V *strictly* less than zero, does it have negative value?
-    return Builder.CreateICmp(llvm::ICmpInst::ICMP_SLT, V, Zero,
-                              llvm::Twine(Name) + "." + V->getName() +
-                                  ".negativitycheck");
-  };
-
-  // 1. Was the old Value negative?
-  llvm::Value *SrcIsNegative = EmitIsNegativeTest(Src, SrcType, "src");
-  // 2. Is the new Value negative?
-  llvm::Value *DstIsNegative = EmitIsNegativeTest(Dst, DstType, "dst");
-  // 3. Now, was the 'negativity status' preserved during the conversion?
-  //    NOTE: conversion from negative to zero is considered to change the sign.
-  //    (We want to get 'false' when the conversion changed the sign)
-  //    So we should just equality-compare the negativity statuses.
-  llvm::Value *Check = nullptr;
-  Check = Builder.CreateICmpEQ(SrcIsNegative, DstIsNegative, "signchangecheck");
-  // If the comparison result is 'false', then the conversion changed the sign.
-  return std::make_pair(
-      ScalarExprEmitter::ICCK_IntegerSignChange,
-      std::make_pair(Check, SanitizerKind::ImplicitIntegerSignChange));
-}
-
-void ScalarExprEmitter::EmitIntegerSignChangeCheck(Value *Src, QualType SrcType,
-                                                   Value *Dst, QualType DstType,
-                                                   SourceLocation Loc) {
-  if (!CGF.SanOpts.has(SanitizerKind::ImplicitIntegerSignChange))
-    return;
-
-  llvm::Type *SrcTy = Src->getType();
-  llvm::Type *DstTy = Dst->getType();
-
-  // We only care about int->int conversions here.
-  // We ignore conversions to/from pointer and/or bool.
-  if (!PromotionIsPotentiallyEligibleForImplicitIntegerConversionCheck(SrcType,
-                                                                       DstType))
-    return;
-
-  bool SrcSigned = SrcType->isSignedIntegerOrEnumerationType();
-  bool DstSigned = DstType->isSignedIntegerOrEnumerationType();
-  unsigned SrcBits = SrcTy->getScalarSizeInBits();
-  unsigned DstBits = DstTy->getScalarSizeInBits();
-
-  // Now, we do not need to emit the check in *all* of the cases.
-  // We can avoid emitting it in some obvious cases where it would have been
-  // dropped by the opt passes (instcombine) always anyways.
-  // If it's a cast between effectively the same type, no check.
-  // NOTE: this is *not* equivalent to checking the canonical types.
-  if (SrcSigned == DstSigned && SrcBits == DstBits)
-    return;
-  // At least one of the values needs to have signed type.
-  // If both are unsigned, then obviously, neither of them can be negative.
-  if (!SrcSigned && !DstSigned)
-    return;
-  // If the conversion is to *larger* *signed* type, then no check is needed.
-  // Because either sign-extension happens (so the sign will remain),
-  // or zero-extension will happen (the sign bit will be zero.)
-  if ((DstBits > SrcBits) && DstSigned)
-    return;
-  if (CGF.SanOpts.has(SanitizerKind::ImplicitSignedIntegerTruncation) &&
-      (SrcBits > DstBits) && SrcSigned) {
-    // If the signed integer truncation sanitizer is enabled,
-    // and this is a truncation from signed type, then no check is needed.
-    // Because here sign change check is interchangeable with truncation check.
-    return;
-  }
-  // That's it. We can't rule out any more cases with the data we have.
-
-  CodeGenFunction::SanitizerScope SanScope(&CGF);
-
-  std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
-            std::pair<llvm::Value *, SanitizerMask>>
-      Check;
-
-  // Each of these checks needs to return 'false' when an issue was detected.
-  ImplicitConversionCheckKind CheckKind;
-  llvm::SmallVector<std::pair<llvm::Value *, SanitizerMask>, 2> Checks;
-  // So we can 'and' all the checks together, and still get 'false',
-  // if at least one of the checks detected an issue.
-
-  Check = EmitIntegerSignChangeCheckHelper(Src, SrcType, Dst, DstType, Builder);
-  CheckKind = Check.first;
-  Checks.emplace_back(Check.second);
-
-  if (CGF.SanOpts.has(SanitizerKind::ImplicitSignedIntegerTruncation) &&
-      (SrcBits > DstBits) && !SrcSigned && DstSigned) {
-    // If the signed integer truncation sanitizer was enabled,
-    // and we are truncating from larger unsigned type to smaller signed type,
-    // let's handle the case we skipped in that check.
-    Check =
-        EmitIntegerTruncationCheckHelper(Src, SrcType, Dst, DstType, Builder);
-    CheckKind = ICCK_SignedIntegerTruncationOrSignChange;
-    Checks.emplace_back(Check.second);
-    // If the comparison result is 'i1 false', then the truncation was lossy.
-  }
-
-  llvm::Constant *StaticArgs[] = {
-      CGF.EmitCheckSourceLocation(Loc), CGF.EmitCheckTypeDescriptor(SrcType),
-      CGF.EmitCheckTypeDescriptor(DstType),
-      llvm::ConstantInt::get(Builder.getInt8Ty(), CheckKind)};
-  // EmitCheck() will 'and' all the checks together.
-  CGF.EmitCheck(Checks, SanitizerHandler::ImplicitConversion, StaticArgs,
-                {Src, Dst});
-}
-
-Value *ScalarExprEmitter::EmitScalarCast(Value *Src, QualType SrcType,
-                                         QualType DstType, llvm::Type *SrcTy,
-                                         llvm::Type *DstTy,
-                                         ScalarConversionOpts Opts) {
-  // The Element types determine the type of cast to perform.
-  llvm::Type *SrcElementTy;
-  llvm::Type *DstElementTy;
-  QualType SrcElementType;
-  QualType DstElementType;
-  if (SrcType->isMatrixType() && DstType->isMatrixType()) {
-    SrcElementTy = cast<llvm::VectorType>(SrcTy)->getElementType();
-    DstElementTy = cast<llvm::VectorType>(DstTy)->getElementType();
-    SrcElementType = SrcType->castAs<MatrixType>()->getElementType();
-    DstElementType = DstType->castAs<MatrixType>()->getElementType();
-  } else {
-    assert(!SrcType->isMatrixType() && !DstType->isMatrixType() &&
-           "cannot cast between matrix and non-matrix types");
-    SrcElementTy = SrcTy;
-    DstElementTy = DstTy;
-    SrcElementType = SrcType;
-    DstElementType = DstType;
-  }
-
-  if (isa<llvm::IntegerType>(SrcElementTy)) {
-    bool InputSigned = SrcElementType->isSignedIntegerOrEnumerationType();
-    if (SrcElementType->isBooleanType() && Opts.TreatBooleanAsSigned) {
-      InputSigned = true;
-    }
-
-    if (isa<llvm::IntegerType>(DstElementTy))
-      return Builder.CreateIntCast(Src, DstTy, InputSigned, "conv");
-    if (InputSigned)
-      return Builder.CreateSIToFP(Src, DstTy, "conv");
-    return Builder.CreateUIToFP(Src, DstTy, "conv");
-  }
-
-  if (isa<llvm::IntegerType>(DstElementTy)) {
-    assert(SrcElementTy->isFloatingPointTy() && "Unknown real conversion");
-    bool IsSigned = DstElementType->isSignedIntegerOrEnumerationType();
-
-    // If we can't recognize overflow as undefined behavior, assume that
-    // overflow saturates. This protects against normal optimizations if we are
-    // compiling with non-standard FP semantics.
-    if (!CGF.CGM.getCodeGenOpts().StrictFloatCastOverflow) {
-      llvm::Intrinsic::ID IID =
-          IsSigned ? llvm::Intrinsic::fptosi_sat : llvm::Intrinsic::fptoui_sat;
-      return Builder.CreateCall(CGF.CGM.getIntrinsic(IID, {DstTy, SrcTy}), Src);
-    }
-
-    if (IsSigned)
-      return Builder.CreateFPToSI(Src, DstTy, "conv");
-    return Builder.CreateFPToUI(Src, DstTy, "conv");
-  }
-
-  if (DstElementTy->getTypeID() < SrcElementTy->getTypeID())
-    return Builder.CreateFPTrunc(Src, DstTy, "conv");
-  return Builder.CreateFPExt(Src, DstTy, "conv");
-}
-
-/// Emit a conversion from the specified type to the specified destination type,
-/// both of which are LLVM scalar types.
-Value *ScalarExprEmitter::EmitScalarConversion(Value *Src, QualType SrcType,
-                                               QualType DstType,
-                                               SourceLocation Loc,
-                                               ScalarConversionOpts Opts) {
-  // All conversions involving fixed point types should be handled by the
-  // EmitFixedPoint family functions. This is done to prevent bloating up this
-  // function more, and although fixed point numbers are represented by
-  // integers, we do not want to follow any logic that assumes they should be
-  // treated as integers.
-  // TODO(leonardchan): When necessary, add another if statement checking for
-  // conversions to fixed point types from other types.
-  if (SrcType->isFixedPointType()) {
-    if (DstType->isBooleanType())
-      // It is important that we check this before checking if the dest type is
-      // an integer because booleans are technically integer types.
-      // We do not need to check the padding bit on unsigned types if unsigned
-      // padding is enabled because overflow into this bit is undefined
-      // behavior.
-      return Builder.CreateIsNotNull(Src, "tobool");
-    if (DstType->isFixedPointType() || DstType->isIntegerType() ||
-        DstType->isRealFloatingType())
-      return EmitFixedPointConversion(Src, SrcType, DstType, Loc);
-
-    llvm_unreachable(
-        "Unhandled scalar conversion from a fixed point type to another type.");
-  } else if (DstType->isFixedPointType()) {
-    if (SrcType->isIntegerType() || SrcType->isRealFloatingType())
-      // This also includes converting booleans and enums to fixed point types.
-      return EmitFixedPointConversion(Src, SrcType, DstType, Loc);
-
-    llvm_unreachable(
-        "Unhandled scalar conversion to a fixed point type from another type.");
-  }
-
-  QualType NoncanonicalSrcType = SrcType;
-  QualType NoncanonicalDstType = DstType;
-
-  SrcType = CGF.getContext().getCanonicalType(SrcType);
-  DstType = CGF.getContext().getCanonicalType(DstType);
-  if (SrcType == DstType) return Src;
-
-  if (DstType->isVoidType()) return nullptr;
-
-  llvm::Value *OrigSrc = Src;
-  QualType OrigSrcType = SrcType;
-  llvm::Type *SrcTy = Src->getType();
-
-  // Handle conversions to bool first, they are special: comparisons against 0.
-  if (DstType->isBooleanType())
-    return EmitConversionToBool(Src, SrcType);
-
-  llvm::Type *DstTy = ConvertType(DstType);
-
-  // Cast from half through float if half isn't a native type.
-  if (SrcType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType) {
-    // Cast to FP using the intrinsic if the half type itself isn't supported.
-    if (DstTy->isFloatingPointTy()) {
-      if (CGF.getContext().getTargetInfo().useFP16ConversionIntrinsics())
-        return Builder.CreateCall(
-            CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16, DstTy),
-            Src);
-    } else {
-      // Cast to other types through float, using either the intrinsic or FPExt,
-      // depending on whether the half type itself is supported
-      // (as opposed to operations on half, available with NativeHalfType).
-      if (CGF.getContext().getTargetInfo().useFP16ConversionIntrinsics()) {
-        Src = Builder.CreateCall(
-            CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16,
-                                 CGF.CGM.FloatTy),
-            Src);
-      } else {
-        Src = Builder.CreateFPExt(Src, CGF.CGM.FloatTy, "conv");
-      }
-      SrcType = CGF.getContext().FloatTy;
-      SrcTy = CGF.FloatTy;
-    }
-  }
-
-  // Ignore conversions like int -> uint.
-  if (SrcTy == DstTy) {
-    if (Opts.EmitImplicitIntegerSignChangeChecks)
-      EmitIntegerSignChangeCheck(Src, NoncanonicalSrcType, Src,
-                                 NoncanonicalDstType, Loc);
-
-    return Src;
-  }
-
-  // Handle pointer conversions next: pointers can only be converted to/from
-  // other pointers and integers. Check for pointer types in terms of LLVM, as
-  // some native types (like Obj-C id) may map to a pointer type.
-  if (auto DstPT = dyn_cast<llvm::PointerType>(DstTy)) {
-    // The source value may be an integer, or a pointer.
-    if (isa<llvm::PointerType>(SrcTy))
-      return Builder.CreateBitCast(Src, DstTy, "conv");
-
-    assert(SrcType->isIntegerType() && "Not ptr->ptr or int->ptr conversion?");
-    // First, convert to the correct width so that we control the kind of
-    // extension.
-    llvm::Type *MiddleTy = CGF.CGM.getDataLayout().getIntPtrType(DstPT);
-    bool InputSigned = SrcType->isSignedIntegerOrEnumerationType();
-    llvm::Value* IntResult =
-        Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv");
-    // Then, cast to pointer.
-    return Builder.CreateIntToPtr(IntResult, DstTy, "conv");
-  }
-
-  if (isa<llvm::PointerType>(SrcTy)) {
-    // Must be an ptr to int cast.
-    assert(isa<llvm::IntegerType>(DstTy) && "not ptr->int?");
-    return Builder.CreatePtrToInt(Src, DstTy, "conv");
-  }
-
-  // A scalar can be splatted to an extended vector of the same element type
-  if (DstType->isExtVectorType() && !SrcType->isVectorType()) {
-    // Sema should add casts to make sure that the source expression's type is
-    // the same as the vector's element type (sans qualifiers)
-    assert(DstType->castAs<ExtVectorType>()->getElementType().getTypePtr() ==
-               SrcType.getTypePtr() &&
-           "Splatted expr doesn't match with vector element type?");
-
-    // Splat the element across to all elements
-    unsigned NumElements = cast<llvm::FixedVectorType>(DstTy)->getNumElements();
-    return Builder.CreateVectorSplat(NumElements, Src, "splat");
-  }
-
-  if (SrcType->isMatrixType() && DstType->isMatrixType())
-    return EmitScalarCast(Src, SrcType, DstType, SrcTy, DstTy, Opts);
-
-  if (isa<llvm::VectorType>(SrcTy) || isa<llvm::VectorType>(DstTy)) {
-    // Allow bitcast from vector to integer/fp of the same size.
-    unsigned SrcSize = SrcTy->getPrimitiveSizeInBits();
-    unsigned DstSize = DstTy->getPrimitiveSizeInBits();
-    if (SrcSize == DstSize)
-      return Builder.CreateBitCast(Src, DstTy, "conv");
-
-    // Conversions between vectors of different sizes are not allowed except
-    // when vectors of half are involved. Operations on storage-only half
-    // vectors require promoting half vector operands to float vectors and
-    // truncating the result, which is either an int or float vector, to a
-    // short or half vector.
-
-    // Source and destination are both expected to be vectors.
-    llvm::Type *SrcElementTy = cast<llvm::VectorType>(SrcTy)->getElementType();
-    llvm::Type *DstElementTy = cast<llvm::VectorType>(DstTy)->getElementType();
-    (void)DstElementTy;
-
-    assert(((SrcElementTy->isIntegerTy() &&
-             DstElementTy->isIntegerTy()) ||
-            (SrcElementTy->isFloatingPointTy() &&
-             DstElementTy->isFloatingPointTy())) &&
-           "unexpected conversion between a floating-point vector and an "
-           "integer vector");
-
-    // Truncate an i32 vector to an i16 vector.
-    if (SrcElementTy->isIntegerTy())
-      return Builder.CreateIntCast(Src, DstTy, false, "conv");
-
-    // Truncate a float vector to a half vector.
-    if (SrcSize > DstSize)
-      return Builder.CreateFPTrunc(Src, DstTy, "conv");
-
-    // Promote a half vector to a float vector.
-    return Builder.CreateFPExt(Src, DstTy, "conv");
-  }
-
-  // Finally, we have the arithmetic types: real int/float.
-  Value *Res = nullptr;
-  llvm::Type *ResTy = DstTy;
-
-  // An overflowing conversion has undefined behavior if either the source type
-  // or the destination type is a floating-point type. However, we consider the
-  // range of representable values for all floating-point types to be
-  // [-inf,+inf], so no overflow can ever happen when the destination type is a
-  // floating-point type.
-  if (CGF.SanOpts.has(SanitizerKind::FloatCastOverflow) &&
-      OrigSrcType->isFloatingType())
-    EmitFloatConversionCheck(OrigSrc, OrigSrcType, Src, SrcType, DstType, DstTy,
-                             Loc);
-
-  // Cast to half through float if half isn't a native type.
-  if (DstType->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType) {
-    // Make sure we cast in a single step if from another FP type.
-    if (SrcTy->isFloatingPointTy()) {
-      // Use the intrinsic if the half type itself isn't supported
-      // (as opposed to operations on half, available with NativeHalfType).
-      if (CGF.getContext().getTargetInfo().useFP16ConversionIntrinsics())
-        return Builder.CreateCall(
-            CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16, SrcTy), Src);
-      // If the half type is supported, just use an fptrunc.
-      return Builder.CreateFPTrunc(Src, DstTy);
-    }
-    DstTy = CGF.FloatTy;
-  }
-
-  Res = EmitScalarCast(Src, SrcType, DstType, SrcTy, DstTy, Opts);
-
-  if (DstTy != ResTy) {
-    if (CGF.getContext().getTargetInfo().useFP16ConversionIntrinsics()) {
-      assert(ResTy->isIntegerTy(16) && "Only half FP requires extra conversion");
-      Res = Builder.CreateCall(
-        CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16, CGF.CGM.FloatTy),
-        Res);
-    } else {
-      Res = Builder.CreateFPTrunc(Res, ResTy, "conv");
-    }
-  }
-
-  if (Opts.EmitImplicitIntegerTruncationChecks)
-    EmitIntegerTruncationCheck(Src, NoncanonicalSrcType, Res,
-                               NoncanonicalDstType, Loc);
-
-  if (Opts.EmitImplicitIntegerSignChangeChecks)
-    EmitIntegerSignChangeCheck(Src, NoncanonicalSrcType, Res,
-                               NoncanonicalDstType, Loc);
-
-  return Res;
-}
-
-Value *ScalarExprEmitter::EmitFixedPointConversion(Value *Src, QualType SrcTy,
-                                                   QualType DstTy,
-                                                   SourceLocation Loc) {
-  llvm::FixedPointBuilder<CGBuilderTy> FPBuilder(Builder);
-  llvm::Value *Result;
-  if (SrcTy->isRealFloatingType())
-    Result = FPBuilder.CreateFloatingToFixed(Src,
-        CGF.getContext().getFixedPointSemantics(DstTy));
-  else if (DstTy->isRealFloatingType())
-    Result = FPBuilder.CreateFixedToFloating(Src,
-        CGF.getContext().getFixedPointSemantics(SrcTy),
-        ConvertType(DstTy));
-  else {
-    auto SrcFPSema = CGF.getContext().getFixedPointSemantics(SrcTy);
-    auto DstFPSema = CGF.getContext().getFixedPointSemantics(DstTy);
-
-    if (DstTy->isIntegerType())
-      Result = FPBuilder.CreateFixedToInteger(Src, SrcFPSema,
-                                              DstFPSema.getWidth(),
-                                              DstFPSema.isSigned());
-    else if (SrcTy->isIntegerType())
-      Result =  FPBuilder.CreateIntegerToFixed(Src, SrcFPSema.isSigned(),
-                                               DstFPSema);
-    else
-      Result = FPBuilder.CreateFixedToFixed(Src, SrcFPSema, DstFPSema);
-  }
-  return Result;
-}
-
-/// Emit a conversion from the specified complex type to the specified
-/// destination type, where the destination type is an LLVM scalar type.
-Value *ScalarExprEmitter::EmitComplexToScalarConversion(
-    CodeGenFunction::ComplexPairTy Src, QualType SrcTy, QualType DstTy,
-    SourceLocation Loc) {
-  // Get the source element type.
-  SrcTy = SrcTy->castAs<ComplexType>()->getElementType();
-
-  // Handle conversions to bool first, they are special: comparisons against 0.
-  if (DstTy->isBooleanType()) {
-    //  Complex != 0  -> (Real != 0) | (Imag != 0)
-    Src.first = EmitScalarConversion(Src.first, SrcTy, DstTy, Loc);
-    Src.second = EmitScalarConversion(Src.second, SrcTy, DstTy, Loc);
-    return Builder.CreateOr(Src.first, Src.second, "tobool");
-  }
-
-  // C99 6.3.1.7p2: "When a value of complex type is converted to a real type,
-  // the imaginary part of the complex value is discarded and the value of the
-  // real part is converted according to the conversion rules for the
-  // corresponding real type.
-  return EmitScalarConversion(Src.first, SrcTy, DstTy, Loc);
-}
-
-Value *ScalarExprEmitter::EmitNullValue(QualType Ty) {
-  return CGF.EmitFromMemory(CGF.CGM.EmitNullConstant(Ty), Ty);
-}
-
-/// Emit a sanitization check for the given "binary" operation (which
-/// might actually be a unary increment which has been lowered to a binary
-/// operation). The check passes if all values in \p Checks (which are \c i1),
-/// are \c true.
-void ScalarExprEmitter::EmitBinOpCheck(
-    ArrayRef<std::pair<Value *, SanitizerMask>> Checks, const BinOpInfo &Info) {
-  assert(CGF.IsSanitizerScope);
-  SanitizerHandler Check;
-  SmallVector<llvm::Constant *, 4> StaticData;
-  SmallVector<llvm::Value *, 2> DynamicData;
-
-  BinaryOperatorKind Opcode = Info.Opcode;
-  if (BinaryOperator::isCompoundAssignmentOp(Opcode))
-    Opcode = BinaryOperator::getOpForCompoundAssignment(Opcode);
-
-  StaticData.push_back(CGF.EmitCheckSourceLocation(Info.E->getExprLoc()));
-  const UnaryOperator *UO = dyn_cast<UnaryOperator>(Info.E);
-  if (UO && UO->getOpcode() == UO_Minus) {
-    Check = SanitizerHandler::NegateOverflow;
-    StaticData.push_back(CGF.EmitCheckTypeDescriptor(UO->getType()));
-    DynamicData.push_back(Info.RHS);
-  } else {
-    if (BinaryOperator::isShiftOp(Opcode)) {
-      // Shift LHS negative or too large, or RHS out of bounds.
-      Check = SanitizerHandler::ShiftOutOfBounds;
-      const BinaryOperator *BO = cast<BinaryOperator>(Info.E);
-      StaticData.push_back(
-        CGF.EmitCheckTypeDescriptor(BO->getLHS()->getType()));
-      StaticData.push_back(
-        CGF.EmitCheckTypeDescriptor(BO->getRHS()->getType()));
-    } else if (Opcode == BO_Div || Opcode == BO_Rem) {
-      // Divide or modulo by zero, or signed overflow (eg INT_MAX / -1).
-      Check = SanitizerHandler::DivremOverflow;
-      StaticData.push_back(CGF.EmitCheckTypeDescriptor(Info.Ty));
-    } else {
-      // Arithmetic overflow (+, -, *).
-      switch (Opcode) {
-      case BO_Add: Check = SanitizerHandler::AddOverflow; break;
-      case BO_Sub: Check = SanitizerHandler::SubOverflow; break;
-      case BO_Mul: Check = SanitizerHandler::MulOverflow; break;
-      default: llvm_unreachable("unexpected opcode for bin op check");
-      }
-      StaticData.push_back(CGF.EmitCheckTypeDescriptor(Info.Ty));
-    }
-    DynamicData.push_back(Info.LHS);
-    DynamicData.push_back(Info.RHS);
-  }
-
-  CGF.EmitCheck(Checks, Check, StaticData, DynamicData);
-}
-
-//===----------------------------------------------------------------------===//
-//                            Visitor Methods
-//===----------------------------------------------------------------------===//
-
-Value *ScalarExprEmitter::VisitExpr(Expr *E) {
-  CGF.ErrorUnsupported(E, "scalar expression");
-  if (E->getType()->isVoidType())
-    return nullptr;
-  return llvm::UndefValue::get(CGF.ConvertType(E->getType()));
-}
-
-Value *
-ScalarExprEmitter::VisitSYCLUniqueStableNameExpr(SYCLUniqueStableNameExpr *E) {
-  ASTContext &Context = CGF.getContext();
-  llvm::Optional<LangAS> GlobalAS =
-      Context.getTargetInfo().getConstantAddressSpace();
-  llvm::Constant *GlobalConstStr = Builder.CreateGlobalStringPtr(
-      E->ComputeName(Context), "__usn_str",
-      static_cast<unsigned>(GlobalAS.getValueOr(LangAS::Default)));
-
-  unsigned ExprAS = Context.getTargetAddressSpace(E->getType());
-
-  if (GlobalConstStr->getType()->getPointerAddressSpace() == ExprAS)
-    return GlobalConstStr;
-
-  llvm::PointerType *PtrTy = cast<llvm::PointerType>(GlobalConstStr->getType());
-  llvm::PointerType *NewPtrTy =
-      llvm::PointerType::getWithSamePointeeType(PtrTy, ExprAS);
-  return Builder.CreateAddrSpaceCast(GlobalConstStr, NewPtrTy, "usn_addr_cast");
-}
-
-Value *ScalarExprEmitter::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
-  // Vector Mask Case
-  if (E->getNumSubExprs() == 2) {
-    Value *LHS = CGF.EmitScalarExpr(E->getExpr(0));
-    Value *RHS = CGF.EmitScalarExpr(E->getExpr(1));
-    Value *Mask;
-
-    auto *LTy = cast<llvm::FixedVectorType>(LHS->getType());
-    unsigned LHSElts = LTy->getNumElements();
-
-    Mask = RHS;
-
-    auto *MTy = cast<llvm::FixedVectorType>(Mask->getType());
-
-    // Mask off the high bits of each shuffle index.
-    Value *MaskBits =
-        llvm::ConstantInt::get(MTy, llvm::NextPowerOf2(LHSElts - 1) - 1);
-    Mask = Builder.CreateAnd(Mask, MaskBits, "mask");
-
-    // newv = undef
-    // mask = mask & maskbits
-    // for each elt
-    //   n = extract mask i
-    //   x = extract val n
-    //   newv = insert newv, x, i
-    auto *RTy = llvm::FixedVectorType::get(LTy->getElementType(),
-                                           MTy->getNumElements());
-    Value* NewV = llvm::UndefValue::get(RTy);
-    for (unsigned i = 0, e = MTy->getNumElements(); i != e; ++i) {
-      Value *IIndx = llvm::ConstantInt::get(CGF.SizeTy, i);
-      Value *Indx = Builder.CreateExtractElement(Mask, IIndx, "shuf_idx");
-
-      Value *VExt = Builder.CreateExtractElement(LHS, Indx, "shuf_elt");
-      NewV = Builder.CreateInsertElement(NewV, VExt, IIndx, "shuf_ins");
-    }
-    return NewV;
-  }
-
-  Value* V1 = CGF.EmitScalarExpr(E->getExpr(0));
-  Value* V2 = CGF.EmitScalarExpr(E->getExpr(1));
-
-  SmallVector<int, 32> Indices;
-  for (unsigned i = 2; i < E->getNumSubExprs(); ++i) {
-    llvm::APSInt Idx = E->getShuffleMaskIdx(CGF.getContext(), i-2);
-    // Check for -1 and output it as undef in the IR.
-    if (Idx.isSigned() && Idx.isAllOnes())
-      Indices.push_back(-1);
-    else
-      Indices.push_back(Idx.getZExtValue());
-  }
-
-  return Builder.CreateShuffleVector(V1, V2, Indices, "shuffle");
-}
-
-Value *ScalarExprEmitter::VisitConvertVectorExpr(ConvertVectorExpr *E) {
-  QualType SrcType = E->getSrcExpr()->getType(),
-           DstType = E->getType();
-
-  Value *Src  = CGF.EmitScalarExpr(E->getSrcExpr());
-
-  SrcType = CGF.getContext().getCanonicalType(SrcType);
-  DstType = CGF.getContext().getCanonicalType(DstType);
-  if (SrcType == DstType) return Src;
-
-  assert(SrcType->isVectorType() &&
-         "ConvertVector source type must be a vector");
-  assert(DstType->isVectorType() &&
-         "ConvertVector destination type must be a vector");
-
-  llvm::Type *SrcTy = Src->getType();
-  llvm::Type *DstTy = ConvertType(DstType);
-
-  // Ignore conversions like int -> uint.
-  if (SrcTy == DstTy)
-    return Src;
-
-  QualType SrcEltType = SrcType->castAs<VectorType>()->getElementType(),
-           DstEltType = DstType->castAs<VectorType>()->getElementType();
-
-  assert(SrcTy->isVectorTy() &&
-         "ConvertVector source IR type must be a vector");
-  assert(DstTy->isVectorTy() &&
-         "ConvertVector destination IR type must be a vector");
-
-  llvm::Type *SrcEltTy = cast<llvm::VectorType>(SrcTy)->getElementType(),
-             *DstEltTy = cast<llvm::VectorType>(DstTy)->getElementType();
-
-  if (DstEltType->isBooleanType()) {
-    assert((SrcEltTy->isFloatingPointTy() ||
-            isa<llvm::IntegerType>(SrcEltTy)) && "Unknown boolean conversion");
-
-    llvm::Value *Zero = llvm::Constant::getNullValue(SrcTy);
-    if (SrcEltTy->isFloatingPointTy()) {
-      return Builder.CreateFCmpUNE(Src, Zero, "tobool");
-    } else {
-      return Builder.CreateICmpNE(Src, Zero, "tobool");
-    }
-  }
-
-  // We have the arithmetic types: real int/float.
-  Value *Res = nullptr;
-
-  if (isa<llvm::IntegerType>(SrcEltTy)) {
-    bool InputSigned = SrcEltType->isSignedIntegerOrEnumerationType();
-    if (isa<llvm::IntegerType>(DstEltTy))
-      Res = Builder.CreateIntCast(Src, DstTy, InputSigned, "conv");
-    else if (InputSigned)
-      Res = Builder.CreateSIToFP(Src, DstTy, "conv");
-    else
-      Res = Builder.CreateUIToFP(Src, DstTy, "conv");
-  } else if (isa<llvm::IntegerType>(DstEltTy)) {
-    assert(SrcEltTy->isFloatingPointTy() && "Unknown real conversion");
-    if (DstEltType->isSignedIntegerOrEnumerationType())
-      Res = Builder.CreateFPToSI(Src, DstTy, "conv");
-    else
-      Res = Builder.CreateFPToUI(Src, DstTy, "conv");
-  } else {
-    assert(SrcEltTy->isFloatingPointTy() && DstEltTy->isFloatingPointTy() &&
-           "Unknown real conversion");
-    if (DstEltTy->getTypeID() < SrcEltTy->getTypeID())
-      Res = Builder.CreateFPTrunc(Src, DstTy, "conv");
-    else
-      Res = Builder.CreateFPExt(Src, DstTy, "conv");
-  }
-
-  return Res;
-}
-
-Value *ScalarExprEmitter::VisitMemberExpr(MemberExpr *E) {
-  if (CodeGenFunction::ConstantEmission Constant = CGF.tryEmitAsConstant(E)) {
-    CGF.EmitIgnoredExpr(E->getBase());
-    return CGF.emitScalarConstant(Constant, E);
-  } else {
-    Expr::EvalResult Result;
-    if (E->EvaluateAsInt(Result, CGF.getContext(), Expr::SE_AllowSideEffects)) {
-      llvm::APSInt Value = Result.Val.getInt();
-      CGF.EmitIgnoredExpr(E->getBase());
-      return Builder.getInt(Value);
-    }
-  }
-
-  return EmitLoadOfLValue(E);
-}
-
-Value *ScalarExprEmitter::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
-  TestAndClearIgnoreResultAssign();
-
-  // Emit subscript expressions in rvalue context's.  For most cases, this just
-  // loads the lvalue formed by the subscript expr.  However, we have to be
-  // careful, because the base of a vector subscript is occasionally an rvalue,
-  // so we can't get it as an lvalue.
-  if (!E->getBase()->getType()->isVectorType())
-    return EmitLoadOfLValue(E);
-
-  // Handle the vector case.  The base must be a vector, the index must be an
-  // integer value.
-  Value *Base = Visit(E->getBase());
-  Value *Idx  = Visit(E->getIdx());
-  QualType IdxTy = E->getIdx()->getType();
-
-  if (CGF.SanOpts.has(SanitizerKind::ArrayBounds))
-    CGF.EmitBoundsCheck(E, E->getBase(), Idx, IdxTy, /*Accessed*/true);
-
-  return Builder.CreateExtractElement(Base, Idx, "vecext");
-}
-
-Value *ScalarExprEmitter::VisitMatrixSubscriptExpr(MatrixSubscriptExpr *E) {
-  TestAndClearIgnoreResultAssign();
-
-  // Handle the vector case.  The base must be a vector, the index must be an
-  // integer value.
-  Value *RowIdx = Visit(E->getRowIdx());
-  Value *ColumnIdx = Visit(E->getColumnIdx());
-
-  const auto *MatrixTy = E->getBase()->getType()->castAs<ConstantMatrixType>();
-  unsigned NumRows = MatrixTy->getNumRows();
-  llvm::MatrixBuilder<CGBuilderTy> MB(Builder);
-  Value *Idx = MB.CreateIndex(RowIdx, ColumnIdx, NumRows);
-  if (CGF.CGM.getCodeGenOpts().OptimizationLevel > 0)
-    MB.CreateIndexAssumption(Idx, MatrixTy->getNumElementsFlattened());
-
-  Value *Matrix = Visit(E->getBase());
-
-  // TODO: Should we emit bounds checks with SanitizerKind::ArrayBounds?
-  return Builder.CreateExtractElement(Matrix, Idx, "matrixext");
-}
-
-static int getMaskElt(llvm::ShuffleVectorInst *SVI, unsigned Idx,
-                      unsigned Off) {
-  int MV = SVI->getMaskValue(Idx);
-  if (MV == -1)
-    return -1;
-  return Off + MV;
-}
-
-static int getAsInt32(llvm::ConstantInt *C, llvm::Type *I32Ty) {
-  assert(llvm::ConstantInt::isValueValidForType(I32Ty, C->getZExtValue()) &&
-         "Index operand too large for shufflevector mask!");
-  return C->getZExtValue();
-}
-
-Value *ScalarExprEmitter::VisitInitListExpr(InitListExpr *E) {
-  bool Ignore = TestAndClearIgnoreResultAssign();
-  (void)Ignore;
-  assert (Ignore == false && "init list ignored");
-  unsigned NumInitElements = E->getNumInits();
-
-  if (E->hadArrayRangeDesignator())
-    CGF.ErrorUnsupported(E, "GNU array range designator extension");
-
-  llvm::VectorType *VType =
-    dyn_cast<llvm::VectorType>(ConvertType(E->getType()));
-
-  if (!VType) {
-    if (NumInitElements == 0) {
-      // C++11 value-initialization for the scalar.
-      return EmitNullValue(E->getType());
-    }
-    // We have a scalar in braces. Just use the first element.
-    return Visit(E->getInit(0));
-  }
-
-  unsigned ResElts = cast<llvm::FixedVectorType>(VType)->getNumElements();
-
-  // Loop over initializers collecting the Value for each, and remembering
-  // whether the source was swizzle (ExtVectorElementExpr).  This will allow
-  // us to fold the shuffle for the swizzle into the shuffle for the vector
-  // initializer, since LLVM optimizers generally do not want to touch
-  // shuffles.
-  unsigned CurIdx = 0;
-  bool VIsUndefShuffle = false;
-  llvm::Value *V = llvm::UndefValue::get(VType);
-  for (unsigned i = 0; i != NumInitElements; ++i) {
-    Expr *IE = E->getInit(i);
-    Value *Init = Visit(IE);
-    SmallVector<int, 16> Args;
-
-    llvm::VectorType *VVT = dyn_cast<llvm::VectorType>(Init->getType());
-
-    // Handle scalar elements.  If the scalar initializer is actually one
-    // element of a different vector of the same width, use shuffle instead of
-    // extract+insert.
-    if (!VVT) {
-      if (isa<ExtVectorElementExpr>(IE)) {
-        llvm::ExtractElementInst *EI = cast<llvm::ExtractElementInst>(Init);
-
-        if (cast<llvm::FixedVectorType>(EI->getVectorOperandType())
-                ->getNumElements() == ResElts) {
-          llvm::ConstantInt *C = cast<llvm::ConstantInt>(EI->getIndexOperand());
-          Value *LHS = nullptr, *RHS = nullptr;
-          if (CurIdx == 0) {
-            // insert into undef -> shuffle (src, undef)
-            // shufflemask must use an i32
-            Args.push_back(getAsInt32(C, CGF.Int32Ty));
-            Args.resize(ResElts, -1);
-
-            LHS = EI->getVectorOperand();
-            RHS = V;
-            VIsUndefShuffle = true;
-          } else if (VIsUndefShuffle) {
-            // insert into undefshuffle && size match -> shuffle (v, src)
-            llvm::ShuffleVectorInst *SVV = cast<llvm::ShuffleVectorInst>(V);
-            for (unsigned j = 0; j != CurIdx; ++j)
-              Args.push_back(getMaskElt(SVV, j, 0));
-            Args.push_back(ResElts + C->getZExtValue());
-            Args.resize(ResElts, -1);
-
-            LHS = cast<llvm::ShuffleVectorInst>(V)->getOperand(0);
-            RHS = EI->getVectorOperand();
-            VIsUndefShuffle = false;
-          }
-          if (!Args.empty()) {
-            V = Builder.CreateShuffleVector(LHS, RHS, Args);
-            ++CurIdx;
-            continue;
-          }
-        }
-      }
-      V = Builder.CreateInsertElement(V, Init, Builder.getInt32(CurIdx),
-                                      "vecinit");
-      VIsUndefShuffle = false;
-      ++CurIdx;
-      continue;
-    }
-
-    unsigned InitElts = cast<llvm::FixedVectorType>(VVT)->getNumElements();
-
-    // If the initializer is an ExtVecEltExpr (a swizzle), and the swizzle's
-    // input is the same width as the vector being constructed, generate an
-    // optimized shuffle of the swizzle input into the result.
-    unsigned Offset = (CurIdx == 0) ? 0 : ResElts;
-    if (isa<ExtVectorElementExpr>(IE)) {
-      llvm::ShuffleVectorInst *SVI = cast<llvm::ShuffleVectorInst>(Init);
-      Value *SVOp = SVI->getOperand(0);
-      auto *OpTy = cast<llvm::FixedVectorType>(SVOp->getType());
-
-      if (OpTy->getNumElements() == ResElts) {
-        for (unsigned j = 0; j != CurIdx; ++j) {
-          // If the current vector initializer is a shuffle with undef, merge
-          // this shuffle directly into it.
-          if (VIsUndefShuffle) {
-            Args.push_back(getMaskElt(cast<llvm::ShuffleVectorInst>(V), j, 0));
-          } else {
-            Args.push_back(j);
-          }
-        }
-        for (unsigned j = 0, je = InitElts; j != je; ++j)
-          Args.push_back(getMaskElt(SVI, j, Offset));
-        Args.resize(ResElts, -1);
-
-        if (VIsUndefShuffle)
-          V = cast<llvm::ShuffleVectorInst>(V)->getOperand(0);
-
-        Init = SVOp;
-      }
-    }
-
-    // Extend init to result vector length, and then shuffle its contribution
-    // to the vector initializer into V.
-    if (Args.empty()) {
-      for (unsigned j = 0; j != InitElts; ++j)
-        Args.push_back(j);
-      Args.resize(ResElts, -1);
-      Init = Builder.CreateShuffleVector(Init, Args, "vext");
-
-      Args.clear();
-      for (unsigned j = 0; j != CurIdx; ++j)
-        Args.push_back(j);
-      for (unsigned j = 0; j != InitElts; ++j)
-        Args.push_back(j + Offset);
-      Args.resize(ResElts, -1);
-    }
-
-    // If V is undef, make sure it ends up on the RHS of the shuffle to aid
-    // merging subsequent shuffles into this one.
-    if (CurIdx == 0)
-      std::swap(V, Init);
-    V = Builder.CreateShuffleVector(V, Init, Args, "vecinit");
-    VIsUndefShuffle = isa<llvm::UndefValue>(Init);
-    CurIdx += InitElts;
-  }
-
-  // FIXME: evaluate codegen vs. shuffling against constant null vector.
-  // Emit remaining default initializers.
-  llvm::Type *EltTy = VType->getElementType();
-
-  // Emit remaining default initializers
-  for (/* Do not initialize i*/; CurIdx < ResElts; ++CurIdx) {
-    Value *Idx = Builder.getInt32(CurIdx);
-    llvm::Value *Init = llvm::Constant::getNullValue(EltTy);
-    V = Builder.CreateInsertElement(V, Init, Idx, "vecinit");
-  }
-  return V;
-}
-
-bool CodeGenFunction::ShouldNullCheckClassCastValue(const CastExpr *CE) {
-  const Expr *E = CE->getSubExpr();
-
-  if (CE->getCastKind() == CK_UncheckedDerivedToBase)
-    return false;
-
-  if (isa<CXXThisExpr>(E->IgnoreParens())) {
-    // We always assume that 'this' is never null.
-    return false;
-  }
-
-  if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(CE)) {
-    // And that glvalue casts are never null.
-    if (ICE->isGLValue())
-      return false;
-  }
-
-  return true;
-}
-
-// VisitCastExpr - Emit code for an explicit or implicit cast.  Implicit casts
-// have to handle a more broad range of conversions than explicit casts, as they
-// handle things like function to ptr-to-function decay etc.
-Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
-  Expr *E = CE->getSubExpr();
-  QualType DestTy = CE->getType();
-  CastKind Kind = CE->getCastKind();
-
-  // These cases are generally not written to ignore the result of
-  // evaluating their sub-expressions, so we clear this now.
-  bool Ignored = TestAndClearIgnoreResultAssign();
-
-  // Since almost all cast kinds apply to scalars, this switch doesn't have
-  // a default case, so the compiler will warn on a missing case.  The cases
-  // are in the same order as in the CastKind enum.
-  switch (Kind) {
-  case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!");
-  case CK_BuiltinFnToFnPtr:
-    llvm_unreachable("builtin functions are handled elsewhere");
-
-  case CK_LValueBitCast:
-  case CK_ObjCObjectLValueCast: {
-    Address Addr = EmitLValue(E).getAddress(CGF);
-    Addr = Builder.CreateElementBitCast(Addr, CGF.ConvertTypeForMem(DestTy));
-    LValue LV = CGF.MakeAddrLValue(Addr, DestTy);
-    return EmitLoadOfLValue(LV, CE->getExprLoc());
-  }
-
-  case CK_LValueToRValueBitCast: {
-    LValue SourceLVal = CGF.EmitLValue(E);
-    Address Addr = Builder.CreateElementBitCast(SourceLVal.getAddress(CGF),
-                                                CGF.ConvertTypeForMem(DestTy));
-    LValue DestLV = CGF.MakeAddrLValue(Addr, DestTy);
-    DestLV.setTBAAInfo(TBAAAccessInfo::getMayAliasInfo());
-    return EmitLoadOfLValue(DestLV, CE->getExprLoc());
-  }
-
-  case CK_CPointerToObjCPointerCast:
-  case CK_BlockPointerToObjCPointerCast:
-  case CK_AnyPointerToBlockPointerCast:
-  case CK_BitCast: {
-    Value *Src = Visit(const_cast<Expr*>(E));
-    llvm::Type *SrcTy = Src->getType();
-    llvm::Type *DstTy = ConvertType(DestTy);
-    if (SrcTy->isPtrOrPtrVectorTy() && DstTy->isPtrOrPtrVectorTy() &&
-        SrcTy->getPointerAddressSpace() != DstTy->getPointerAddressSpace()) {
-      llvm_unreachable("wrong cast for pointers in different address spaces"
-                       "(must be an address space cast)!");
-    }
-
-    if (CGF.SanOpts.has(SanitizerKind::CFIUnrelatedCast)) {
-      if (auto PT = DestTy->getAs<PointerType>())
-        CGF.EmitVTablePtrCheckForCast(PT->getPointeeType(), Src,
-                                      /*MayBeNull=*/true,
-                                      CodeGenFunction::CFITCK_UnrelatedCast,
-                                      CE->getBeginLoc());
-    }
-
-    if (CGF.CGM.getCodeGenOpts().StrictVTablePointers) {
-      const QualType SrcType = E->getType();
-
-      if (SrcType.mayBeNotDynamicClass() && DestTy.mayBeDynamicClass()) {
-        // Casting to pointer that could carry dynamic information (provided by
-        // invariant.group) requires launder.
-        Src = Builder.CreateLaunderInvariantGroup(Src);
-      } else if (SrcType.mayBeDynamicClass() && DestTy.mayBeNotDynamicClass()) {
-        // Casting to pointer that does not carry dynamic information (provided
-        // by invariant.group) requires stripping it.  Note that we don't do it
-        // if the source could not be dynamic type and destination could be
-        // dynamic because dynamic information is already laundered.  It is
-        // because launder(strip(src)) == launder(src), so there is no need to
-        // add extra strip before launder.
-        Src = Builder.CreateStripInvariantGroup(Src);
-      }
-    }
-
-    // Update heapallocsite metadata when there is an explicit pointer cast.
-    if (auto *CI = dyn_cast<llvm::CallBase>(Src)) {
-      if (CI->getMetadata("heapallocsite") && isa<ExplicitCastExpr>(CE)) {
-        QualType PointeeType = DestTy->getPointeeType();
-        if (!PointeeType.isNull())
-          CGF.getDebugInfo()->addHeapAllocSiteMetadata(CI, PointeeType,
-                                                       CE->getExprLoc());
-      }
-    }
-
-    // If Src is a fixed vector and Dst is a scalable vector, and both have the
-    // same element type, use the llvm.experimental.vector.insert intrinsic to
-    // perform the bitcast.
-    if (const auto *FixedSrc = dyn_cast<llvm::FixedVectorType>(SrcTy)) {
-      if (const auto *ScalableDst = dyn_cast<llvm::ScalableVectorType>(DstTy)) {
-        // If we are casting a fixed i8 vector to a scalable 16 x i1 predicate
-        // vector, use a vector insert and bitcast the result.
-        bool NeedsBitCast = false;
-        auto PredType = llvm::ScalableVectorType::get(Builder.getInt1Ty(), 16);
-        llvm::Type *OrigType = DstTy;
-        if (ScalableDst == PredType &&
-            FixedSrc->getElementType() == Builder.getInt8Ty()) {
-          DstTy = llvm::ScalableVectorType::get(Builder.getInt8Ty(), 2);
-          ScalableDst = dyn_cast<llvm::ScalableVectorType>(DstTy);
-          NeedsBitCast = true;
-        }
-        if (FixedSrc->getElementType() == ScalableDst->getElementType()) {
-          llvm::Value *UndefVec = llvm::UndefValue::get(DstTy);
-          llvm::Value *Zero = llvm::Constant::getNullValue(CGF.CGM.Int64Ty);
-          llvm::Value *Result = Builder.CreateInsertVector(
-              DstTy, UndefVec, Src, Zero, "castScalableSve");
-          if (NeedsBitCast)
-            Result = Builder.CreateBitCast(Result, OrigType);
-          return Result;
-        }
-      }
-    }
-
-    // If Src is a scalable vector and Dst is a fixed vector, and both have the
-    // same element type, use the llvm.experimental.vector.extract intrinsic to
-    // perform the bitcast.
-    if (const auto *ScalableSrc = dyn_cast<llvm::ScalableVectorType>(SrcTy)) {
-      if (const auto *FixedDst = dyn_cast<llvm::FixedVectorType>(DstTy)) {
-        // If we are casting a scalable 16 x i1 predicate vector to a fixed i8
-        // vector, bitcast the source and use a vector extract.
-        auto PredType = llvm::ScalableVectorType::get(Builder.getInt1Ty(), 16);
-        if (ScalableSrc == PredType &&
-            FixedDst->getElementType() == Builder.getInt8Ty()) {
-          SrcTy = llvm::ScalableVectorType::get(Builder.getInt8Ty(), 2);
-          ScalableSrc = dyn_cast<llvm::ScalableVectorType>(SrcTy);
-          Src = Builder.CreateBitCast(Src, SrcTy);
-        }
-        if (ScalableSrc->getElementType() == FixedDst->getElementType()) {
-          llvm::Value *Zero = llvm::Constant::getNullValue(CGF.CGM.Int64Ty);
-          return Builder.CreateExtractVector(DstTy, Src, Zero, "castFixedSve");
-        }
-      }
-    }
-
-    // Perform VLAT <-> VLST bitcast through memory.
-    // TODO: since the llvm.experimental.vector.{insert,extract} intrinsics
-    //       require the element types of the vectors to be the same, we
-    //       need to keep this around for bitcasts between VLAT <-> VLST where
-    //       the element types of the vectors are not the same, until we figure
-    //       out a better way of doing these casts.
-    if ((isa<llvm::FixedVectorType>(SrcTy) &&
-         isa<llvm::ScalableVectorType>(DstTy)) ||
-        (isa<llvm::ScalableVectorType>(SrcTy) &&
-         isa<llvm::FixedVectorType>(DstTy))) {
-      Address Addr = CGF.CreateDefaultAlignTempAlloca(SrcTy, "saved-value");
-      LValue LV = CGF.MakeAddrLValue(Addr, E->getType());
-      CGF.EmitStoreOfScalar(Src, LV);
-      Addr = Builder.CreateElementBitCast(Addr, CGF.ConvertTypeForMem(DestTy),
-                                          "castFixedSve");
-      LValue DestLV = CGF.MakeAddrLValue(Addr, DestTy);
-      DestLV.setTBAAInfo(TBAAAccessInfo::getMayAliasInfo());
-      return EmitLoadOfLValue(DestLV, CE->getExprLoc());
-    }
-
-    return Builder.CreateBitCast(Src, DstTy);
-  }
-  case CK_AddressSpaceConversion: {
-    Expr::EvalResult Result;
-    if (E->EvaluateAsRValue(Result, CGF.getContext()) &&
-        Result.Val.isNullPointer()) {
-      // If E has side effect, it is emitted even if its final result is a
-      // null pointer. In that case, a DCE pass should be able to
-      // eliminate the useless instructions emitted during translating E.
-      if (Result.HasSideEffects)
-        Visit(E);
-      return CGF.CGM.getNullPointer(cast<llvm::PointerType>(
-          ConvertType(DestTy)), DestTy);
-    }
-    // Since target may map different address spaces in AST to the same address
-    // space, an address space conversion may end up as a bitcast.
-    return CGF.CGM.getTargetCodeGenInfo().performAddrSpaceCast(
-        CGF, Visit(E), E->getType()->getPointeeType().getAddressSpace(),
-        DestTy->getPointeeType().getAddressSpace(), ConvertType(DestTy));
-  }
-  case CK_AtomicToNonAtomic:
-  case CK_NonAtomicToAtomic:
-  case CK_UserDefinedConversion:
-    return Visit(const_cast<Expr*>(E));
-
-  case CK_NoOp: {
-    llvm::Value *V = Visit(const_cast<Expr *>(E));
-    if (V) {
-      // CK_NoOp can model a pointer qualification conversion, which can remove
-      // an array bound and change the IR type.
-      // FIXME: Once pointee types are removed from IR, remove this.
-      llvm::Type *T = ConvertType(DestTy);
-      if (T != V->getType())
-        V = Builder.CreateBitCast(V, T);
-    }
-    return V;
-  }
-
-  case CK_BaseToDerived: {
-    const CXXRecordDecl *DerivedClassDecl = DestTy->getPointeeCXXRecordDecl();
-    assert(DerivedClassDecl && "BaseToDerived arg isn't a C++ object pointer!");
-
-    Address Base = CGF.EmitPointerWithAlignment(E);
-    Address Derived =
-      CGF.GetAddressOfDerivedClass(Base, DerivedClassDecl,
-                                   CE->path_begin(), CE->path_end(),
-                                   CGF.ShouldNullCheckClassCastValue(CE));
-
-    // C++11 [expr.static.cast]p11: Behavior is undefined if a downcast is
-    // performed and the object is not of the derived type.
-    if (CGF.sanitizePerformTypeCheck())
-      CGF.EmitTypeCheck(CodeGenFunction::TCK_DowncastPointer, CE->getExprLoc(),
-                        Derived.getPointer(), DestTy->getPointeeType());
-
-    if (CGF.SanOpts.has(SanitizerKind::CFIDerivedCast))
-      CGF.EmitVTablePtrCheckForCast(
-          DestTy->getPointeeType(), Derived.getPointer(),
-          /*MayBeNull=*/true, CodeGenFunction::CFITCK_DerivedCast,
-          CE->getBeginLoc());
-
-    return Derived.getPointer();
-  }
-  case CK_UncheckedDerivedToBase:
-  case CK_DerivedToBase: {
-    // The EmitPointerWithAlignment path does this fine; just discard
-    // the alignment.
-    return CGF.EmitPointerWithAlignment(CE).getPointer();
-  }
-
-  case CK_Dynamic: {
-    Address V = CGF.EmitPointerWithAlignment(E);
-    const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(CE);
-    return CGF.EmitDynamicCast(V, DCE);
-  }
-
-  case CK_ArrayToPointerDecay:
-    return CGF.EmitArrayToPointerDecay(E).getPointer();
-  case CK_FunctionToPointerDecay:
-    return EmitLValue(E).getPointer(CGF);
-
-  case CK_NullToPointer:
-    if (MustVisitNullValue(E))
-      CGF.EmitIgnoredExpr(E);
-
-    return CGF.CGM.getNullPointer(cast<llvm::PointerType>(ConvertType(DestTy)),
-                              DestTy);
-
-  case CK_NullToMemberPointer: {
-    if (MustVisitNullValue(E))
-      CGF.EmitIgnoredExpr(E);
-
-    const MemberPointerType *MPT = CE->getType()->getAs<MemberPointerType>();
-    return CGF.CGM.getCXXABI().EmitNullMemberPointer(MPT);
-  }
-
-  case CK_ReinterpretMemberPointer:
-  case CK_BaseToDerivedMemberPointer:
-  case CK_DerivedToBaseMemberPointer: {
-    Value *Src = Visit(E);
-
-    // Note that the AST doesn't distinguish between checked and
-    // unchecked member pointer conversions, so we always have to
-    // implement checked conversions here.  This is inefficient when
-    // actual control flow may be required in order to perform the
-    // check, which it is for data member pointers (but not member
-    // function pointers on Itanium and ARM).
-    return CGF.CGM.getCXXABI().EmitMemberPointerConversion(CGF, CE, Src);
-  }
-
-  case CK_ARCProduceObject:
-    return CGF.EmitARCRetainScalarExpr(E);
-  case CK_ARCConsumeObject:
-    return CGF.EmitObjCConsumeObject(E->getType(), Visit(E));
-  case CK_ARCReclaimReturnedObject:
-    return CGF.EmitARCReclaimReturnedObject(E, /*allowUnsafe*/ Ignored);
-  case CK_ARCExtendBlockObject:
-    return CGF.EmitARCExtendBlockObject(E);
-
-  case CK_CopyAndAutoreleaseBlockObject:
-    return CGF.EmitBlockCopyAndAutorelease(Visit(E), E->getType());
-
-  case CK_FloatingRealToComplex:
-  case CK_FloatingComplexCast:
-  case CK_IntegralRealToComplex:
-  case CK_IntegralComplexCast:
-  case CK_IntegralComplexToFloatingComplex:
-  case CK_FloatingComplexToIntegralComplex:
-  case CK_ConstructorConversion:
-  case CK_ToUnion:
-    llvm_unreachable("scalar cast to non-scalar value");
-
-  case CK_LValueToRValue:
-    assert(CGF.getContext().hasSameUnqualifiedType(E->getType(), DestTy));
-    assert(E->isGLValue() && "lvalue-to-rvalue applied to r-value!");
-    return Visit(const_cast<Expr*>(E));
-
-  case CK_IntegralToPointer: {
-    Value *Src = Visit(const_cast<Expr*>(E));
-
-    // First, convert to the correct width so that we control the kind of
-    // extension.
-    auto DestLLVMTy = ConvertType(DestTy);
-    llvm::Type *MiddleTy = CGF.CGM.getDataLayout().getIntPtrType(DestLLVMTy);
-    bool InputSigned = E->getType()->isSignedIntegerOrEnumerationType();
-    llvm::Value* IntResult =
-      Builder.CreateIntCast(Src, MiddleTy, InputSigned, "conv");
-
-    auto *IntToPtr = Builder.CreateIntToPtr(IntResult, DestLLVMTy);
-
-    if (CGF.CGM.getCodeGenOpts().StrictVTablePointers) {
-      // Going from integer to pointer that could be dynamic requires reloading
-      // dynamic information from invariant.group.
-      if (DestTy.mayBeDynamicClass())
-        IntToPtr = Builder.CreateLaunderInvariantGroup(IntToPtr);
-    }
-    return IntToPtr;
-  }
-  case CK_PointerToIntegral: {
-    assert(!DestTy->isBooleanType() && "bool should use PointerToBool");
-    auto *PtrExpr = Visit(E);
-
-    if (CGF.CGM.getCodeGenOpts().StrictVTablePointers) {
-      const QualType SrcType = E->getType();
-
-      // Casting to integer requires stripping dynamic information as it does
-      // not carries it.
-      if (SrcType.mayBeDynamicClass())
-        PtrExpr = Builder.CreateStripInvariantGroup(PtrExpr);
-    }
-
-    return Builder.CreatePtrToInt(PtrExpr, ConvertType(DestTy));
-  }
-  case CK_ToVoid: {
-    CGF.EmitIgnoredExpr(E);
-    return nullptr;
-  }
-  case CK_MatrixCast: {
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc());
-  }
-  case CK_VectorSplat: {
-    llvm::Type *DstTy = ConvertType(DestTy);
-    Value *Elt = Visit(const_cast<Expr*>(E));
-    // Splat the element across to all elements
-    unsigned NumElements = cast<llvm::FixedVectorType>(DstTy)->getNumElements();
-    return Builder.CreateVectorSplat(NumElements, Elt, "splat");
-  }
-
-  case CK_FixedPointCast:
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc());
-
-  case CK_FixedPointToBoolean:
-    assert(E->getType()->isFixedPointType() &&
-           "Expected src type to be fixed point type");
-    assert(DestTy->isBooleanType() && "Expected dest type to be boolean type");
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc());
-
-  case CK_FixedPointToIntegral:
-    assert(E->getType()->isFixedPointType() &&
-           "Expected src type to be fixed point type");
-    assert(DestTy->isIntegerType() && "Expected dest type to be an integer");
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc());
-
-  case CK_IntegralToFixedPoint:
-    assert(E->getType()->isIntegerType() &&
-           "Expected src type to be an integer");
-    assert(DestTy->isFixedPointType() &&
-           "Expected dest type to be fixed point type");
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc());
-
-  case CK_IntegralCast: {
-    ScalarConversionOpts Opts;
-    if (auto *ICE = dyn_cast<ImplicitCastExpr>(CE)) {
-      if (!ICE->isPartOfExplicitCast())
-        Opts = ScalarConversionOpts(CGF.SanOpts);
-    }
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc(), Opts);
-  }
-  case CK_IntegralToFloating:
-  case CK_FloatingToIntegral:
-  case CK_FloatingCast:
-  case CK_FixedPointToFloating:
-  case CK_FloatingToFixedPoint: {
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, CE);
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc());
-  }
-  case CK_BooleanToSignedIntegral: {
-    ScalarConversionOpts Opts;
-    Opts.TreatBooleanAsSigned = true;
-    return EmitScalarConversion(Visit(E), E->getType(), DestTy,
-                                CE->getExprLoc(), Opts);
-  }
-  case CK_IntegralToBoolean:
-    return EmitIntToBoolConversion(Visit(E));
-  case CK_PointerToBoolean:
-    return EmitPointerToBoolConversion(Visit(E), E->getType());
-  case CK_FloatingToBoolean: {
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, CE);
-    return EmitFloatToBoolConversion(Visit(E));
-  }
-  case CK_MemberPointerToBoolean: {
-    llvm::Value *MemPtr = Visit(E);
-    const MemberPointerType *MPT = E->getType()->getAs<MemberPointerType>();
-    return CGF.CGM.getCXXABI().EmitMemberPointerIsNotNull(CGF, MemPtr, MPT);
-  }
-
-  case CK_FloatingComplexToReal:
-  case CK_IntegralComplexToReal:
-    return CGF.EmitComplexExpr(E, false, true).first;
-
-  case CK_FloatingComplexToBoolean:
-  case CK_IntegralComplexToBoolean: {
-    CodeGenFunction::ComplexPairTy V = CGF.EmitComplexExpr(E);
-
-    // TODO: kill this function off, inline appropriate case here
-    return EmitComplexToScalarConversion(V, E->getType(), DestTy,
-                                         CE->getExprLoc());
-  }
-
-  case CK_ZeroToOCLOpaqueType: {
-    assert((DestTy->isEventT() || DestTy->isQueueT() ||
-            DestTy->isOCLIntelSubgroupAVCType()) &&
-           "CK_ZeroToOCLEvent cast on non-event type");
-    return llvm::Constant::getNullValue(ConvertType(DestTy));
-  }
-
-  case CK_IntToOCLSampler:
-    return CGF.CGM.createOpenCLIntToSamplerConversion(E, CGF);
-
-  } // end of switch
-
-  llvm_unreachable("unknown scalar cast");
-}
-
-Value *ScalarExprEmitter::VisitStmtExpr(const StmtExpr *E) {
-  CodeGenFunction::StmtExprEvaluation eval(CGF);
-  Address RetAlloca = CGF.EmitCompoundStmt(*E->getSubStmt(),
-                                           !E->getType()->isVoidType());
-  if (!RetAlloca.isValid())
-    return nullptr;
-  return CGF.EmitLoadOfScalar(CGF.MakeAddrLValue(RetAlloca, E->getType()),
-                              E->getExprLoc());
-}
-
-Value *ScalarExprEmitter::VisitExprWithCleanups(ExprWithCleanups *E) {
-  CodeGenFunction::RunCleanupsScope Scope(CGF);
-  Value *V = Visit(E->getSubExpr());
-  // Defend against dominance problems caused by jumps out of expression
-  // evaluation through the shared cleanup block.
-  Scope.ForceCleanup({&V});
-  return V;
-}
-
-//===----------------------------------------------------------------------===//
-//                             Unary Operators
-//===----------------------------------------------------------------------===//
-
-static BinOpInfo createBinOpInfoFromIncDec(const UnaryOperator *E,
-                                           llvm::Value *InVal, bool IsInc,
-                                           FPOptions FPFeatures) {
-  BinOpInfo BinOp;
-  BinOp.LHS = InVal;
-  BinOp.RHS = llvm::ConstantInt::get(InVal->getType(), 1, false);
-  BinOp.Ty = E->getType();
-  BinOp.Opcode = IsInc ? BO_Add : BO_Sub;
-  BinOp.FPFeatures = FPFeatures;
-  BinOp.E = E;
-  return BinOp;
-}
-
-llvm::Value *ScalarExprEmitter::EmitIncDecConsiderOverflowBehavior(
-    const UnaryOperator *E, llvm::Value *InVal, bool IsInc) {
-  llvm::Value *Amount =
-      llvm::ConstantInt::get(InVal->getType(), IsInc ? 1 : -1, true);
-  StringRef Name = IsInc ? "inc" : "dec";
-  switch (CGF.getLangOpts().getSignedOverflowBehavior()) {
-  case LangOptions::SOB_Defined:
-    return Builder.CreateAdd(InVal, Amount, Name);
-  case LangOptions::SOB_Undefined:
-    if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow))
-      return Builder.CreateNSWAdd(InVal, Amount, Name);
-    LLVM_FALLTHROUGH;
-  case LangOptions::SOB_Trapping:
-    if (!E->canOverflow())
-      return Builder.CreateNSWAdd(InVal, Amount, Name);
-    return EmitOverflowCheckedBinOp(createBinOpInfoFromIncDec(
-        E, InVal, IsInc, E->getFPFeaturesInEffect(CGF.getLangOpts())));
-  }
-  llvm_unreachable("Unknown SignedOverflowBehaviorTy");
-}
-
-namespace {
-/// Handles check and update for lastprivate conditional variables.
-class OMPLastprivateConditionalUpdateRAII {
-private:
-  CodeGenFunction &CGF;
-  const UnaryOperator *E;
-
-public:
-  OMPLastprivateConditionalUpdateRAII(CodeGenFunction &CGF,
-                                      const UnaryOperator *E)
-      : CGF(CGF), E(E) {}
-  ~OMPLastprivateConditionalUpdateRAII() {
-    if (CGF.getLangOpts().OpenMP)
-      CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(
-          CGF, E->getSubExpr());
-  }
-};
-} // namespace
-
-llvm::Value *
-ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
-                                           bool isInc, bool isPre) {
-  OMPLastprivateConditionalUpdateRAII OMPRegion(CGF, E);
-  QualType type = E->getSubExpr()->getType();
-  llvm::PHINode *atomicPHI = nullptr;
-  llvm::Value *value;
-  llvm::Value *input;
-
-  int amount = (isInc ? 1 : -1);
-  bool isSubtraction = !isInc;
-
-  if (const AtomicType *atomicTy = type->getAs<AtomicType>()) {
-    type = atomicTy->getValueType();
-    if (isInc && type->isBooleanType()) {
-      llvm::Value *True = CGF.EmitToMemory(Builder.getTrue(), type);
-      if (isPre) {
-        Builder.CreateStore(True, LV.getAddress(CGF), LV.isVolatileQualified())
-            ->setAtomic(llvm::AtomicOrdering::SequentiallyConsistent);
-        return Builder.getTrue();
-      }
-      // For atomic bool increment, we just store true and return it for
-      // preincrement, do an atomic swap with true for postincrement
-      return Builder.CreateAtomicRMW(
-          llvm::AtomicRMWInst::Xchg, LV.getPointer(CGF), True,
-          llvm::AtomicOrdering::SequentiallyConsistent);
-    }
-    // Special case for atomic increment / decrement on integers, emit
-    // atomicrmw instructions.  We skip this if we want to be doing overflow
-    // checking, and fall into the slow path with the atomic cmpxchg loop.
-    if (!type->isBooleanType() && type->isIntegerType() &&
-        !(type->isUnsignedIntegerType() &&
-          CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) &&
-        CGF.getLangOpts().getSignedOverflowBehavior() !=
-            LangOptions::SOB_Trapping) {
-      llvm::AtomicRMWInst::BinOp aop = isInc ? llvm::AtomicRMWInst::Add :
-        llvm::AtomicRMWInst::Sub;
-      llvm::Instruction::BinaryOps op = isInc ? llvm::Instruction::Add :
-        llvm::Instruction::Sub;
-      llvm::Value *amt = CGF.EmitToMemory(
-          llvm::ConstantInt::get(ConvertType(type), 1, true), type);
-      llvm::Value *old =
-          Builder.CreateAtomicRMW(aop, LV.getPointer(CGF), amt,
-                                  llvm::AtomicOrdering::SequentiallyConsistent);
-      return isPre ? Builder.CreateBinOp(op, old, amt) : old;
-    }
-    value = EmitLoadOfLValue(LV, E->getExprLoc());
-    input = value;
-    // For every other atomic operation, we need to emit a load-op-cmpxchg loop
-    llvm::BasicBlock *startBB = Builder.GetInsertBlock();
-    llvm::BasicBlock *opBB = CGF.createBasicBlock("atomic_op", CGF.CurFn);
-    value = CGF.EmitToMemory(value, type);
-    Builder.CreateBr(opBB);
-    Builder.SetInsertPoint(opBB);
-    atomicPHI = Builder.CreatePHI(value->getType(), 2);
-    atomicPHI->addIncoming(value, startBB);
-    value = atomicPHI;
-  } else {
-    value = EmitLoadOfLValue(LV, E->getExprLoc());
-    input = value;
-  }
-
-  // Special case of integer increment that we have to check first: bool++.
-  // Due to promotion rules, we get:
-  //   bool++ -> bool = bool + 1
-  //          -> bool = (int)bool + 1
-  //          -> bool = ((int)bool + 1 != 0)
-  // An interesting aspect of this is that increment is always true.
-  // Decrement does not have this property.
-  if (isInc && type->isBooleanType()) {
-    value = Builder.getTrue();
-
-  // Most common case by far: integer increment.
-  } else if (type->isIntegerType()) {
-    QualType promotedType;
-    bool canPerformLossyDemotionCheck = false;
-    if (type->isPromotableIntegerType()) {
-      promotedType = CGF.getContext().getPromotedIntegerType(type);
-      assert(promotedType != type && "Shouldn't promote to the same type.");
-      canPerformLossyDemotionCheck = true;
-      canPerformLossyDemotionCheck &=
-          CGF.getContext().getCanonicalType(type) !=
-          CGF.getContext().getCanonicalType(promotedType);
-      canPerformLossyDemotionCheck &=
-          PromotionIsPotentiallyEligibleForImplicitIntegerConversionCheck(
-              type, promotedType);
-      assert((!canPerformLossyDemotionCheck ||
-              type->isSignedIntegerOrEnumerationType() ||
-              promotedType->isSignedIntegerOrEnumerationType() ||
-              ConvertType(type)->getScalarSizeInBits() ==
-                  ConvertType(promotedType)->getScalarSizeInBits()) &&
-             "The following check expects that if we do promotion to different "
-             "underlying canonical type, at least one of the types (either "
-             "base or promoted) will be signed, or the bitwidths will match.");
-    }
-    if (CGF.SanOpts.hasOneOf(
-            SanitizerKind::ImplicitIntegerArithmeticValueChange) &&
-        canPerformLossyDemotionCheck) {
-      // While `x += 1` (for `x` with width less than int) is modeled as
-      // promotion+arithmetics+demotion, and we can catch lossy demotion with
-      // ease; inc/dec with width less than int can't overflow because of
-      // promotion rules, so we omit promotion+demotion, which means that we can
-      // not catch lossy "demotion". Because we still want to catch these cases
-      // when the sanitizer is enabled, we perform the promotion, then perform
-      // the increment/decrement in the wider type, and finally
-      // perform the demotion. This will catch lossy demotions.
-
-      value = EmitScalarConversion(value, type, promotedType, E->getExprLoc());
-      Value *amt = llvm::ConstantInt::get(value->getType(), amount, true);
-      value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec");
-      // Do pass non-default ScalarConversionOpts so that sanitizer check is
-      // emitted.
-      value = EmitScalarConversion(value, promotedType, type, E->getExprLoc(),
-                                   ScalarConversionOpts(CGF.SanOpts));
-
-      // Note that signed integer inc/dec with width less than int can't
-      // overflow because of promotion rules; we're just eliding a few steps
-      // here.
-    } else if (E->canOverflow() && type->isSignedIntegerOrEnumerationType()) {
-      value = EmitIncDecConsiderOverflowBehavior(E, value, isInc);
-    } else if (E->canOverflow() && type->isUnsignedIntegerType() &&
-               CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) {
-      value = EmitOverflowCheckedBinOp(createBinOpInfoFromIncDec(
-          E, value, isInc, E->getFPFeaturesInEffect(CGF.getLangOpts())));
-    } else {
-      llvm::Value *amt = llvm::ConstantInt::get(value->getType(), amount, true);
-      value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec");
-    }
-
-  // Next most common: pointer increment.
-  } else if (const PointerType *ptr = type->getAs<PointerType>()) {
-    QualType type = ptr->getPointeeType();
-
-    // VLA types don't have constant size.
-    if (const VariableArrayType *vla
-          = CGF.getContext().getAsVariableArrayType(type)) {
-      llvm::Value *numElts = CGF.getVLASize(vla).NumElts;
-      if (!isInc) numElts = Builder.CreateNSWNeg(numElts, "vla.negsize");
-      llvm::Type *elemTy = value->getType()->getPointerElementType();
-      if (CGF.getLangOpts().isSignedOverflowDefined())
-        value = Builder.CreateGEP(elemTy, value, numElts, "vla.inc");
-      else
-        value = CGF.EmitCheckedInBoundsGEP(
-            elemTy, value, numElts, /*SignedIndices=*/false, isSubtraction,
-            E->getExprLoc(), "vla.inc");
-
-    // Arithmetic on function pointers (!) is just +-1.
-    } else if (type->isFunctionType()) {
-      llvm::Value *amt = Builder.getInt32(amount);
-
-      value = CGF.EmitCastToVoidPtr(value);
-      if (CGF.getLangOpts().isSignedOverflowDefined())
-        value = Builder.CreateGEP(CGF.Int8Ty, value, amt, "incdec.funcptr");
-      else
-        value = CGF.EmitCheckedInBoundsGEP(CGF.Int8Ty, value, amt,
-                                           /*SignedIndices=*/false,
-                                           isSubtraction, E->getExprLoc(),
-                                           "incdec.funcptr");
-      value = Builder.CreateBitCast(value, input->getType());
-
-    // For everything else, we can just do a simple increment.
-    } else {
-      llvm::Value *amt = Builder.getInt32(amount);
-      llvm::Type *elemTy = CGF.ConvertTypeForMem(type);
-      if (CGF.getLangOpts().isSignedOverflowDefined())
-        value = Builder.CreateGEP(elemTy, value, amt, "incdec.ptr");
-      else
-        value = CGF.EmitCheckedInBoundsGEP(
-            elemTy, value, amt, /*SignedIndices=*/false, isSubtraction,
-            E->getExprLoc(), "incdec.ptr");
-    }
-
-  // Vector increment/decrement.
-  } else if (type->isVectorType()) {
-    if (type->hasIntegerRepresentation()) {
-      llvm::Value *amt = llvm::ConstantInt::get(value->getType(), amount);
-
-      value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec");
-    } else {
-      value = Builder.CreateFAdd(
-                  value,
-                  llvm::ConstantFP::get(value->getType(), amount),
-                  isInc ? "inc" : "dec");
-    }
-
-  // Floating point.
-  } else if (type->isRealFloatingType()) {
-    // Add the inc/dec to the real part.
-    llvm::Value *amt;
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, E);
-
-    if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType) {
-      // Another special case: half FP increment should be done via float
-      if (CGF.getContext().getTargetInfo().useFP16ConversionIntrinsics()) {
-        value = Builder.CreateCall(
-            CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_from_fp16,
-                                 CGF.CGM.FloatTy),
-            input, "incdec.conv");
-      } else {
-        value = Builder.CreateFPExt(input, CGF.CGM.FloatTy, "incdec.conv");
-      }
-    }
-
-    if (value->getType()->isFloatTy())
-      amt = llvm::ConstantFP::get(VMContext,
-                                  llvm::APFloat(static_cast<float>(amount)));
-    else if (value->getType()->isDoubleTy())
-      amt = llvm::ConstantFP::get(VMContext,
-                                  llvm::APFloat(static_cast<double>(amount)));
-    else {
-      // Remaining types are Half, LongDouble, __ibm128 or __float128. Convert
-      // from float.
-      llvm::APFloat F(static_cast<float>(amount));
-      bool ignored;
-      const llvm::fltSemantics *FS;
-      // Don't use getFloatTypeSemantics because Half isn't
-      // necessarily represented using the "half" LLVM type.
-      if (value->getType()->isFP128Ty())
-        FS = &CGF.getTarget().getFloat128Format();
-      else if (value->getType()->isHalfTy())
-        FS = &CGF.getTarget().getHalfFormat();
-      else if (value->getType()->isPPC_FP128Ty())
-        FS = &CGF.getTarget().getIbm128Format();
-      else
-        FS = &CGF.getTarget().getLongDoubleFormat();
-      F.convert(*FS, llvm::APFloat::rmTowardZero, &ignored);
-      amt = llvm::ConstantFP::get(VMContext, F);
-    }
-    value = Builder.CreateFAdd(value, amt, isInc ? "inc" : "dec");
-
-    if (type->isHalfType() && !CGF.getContext().getLangOpts().NativeHalfType) {
-      if (CGF.getContext().getTargetInfo().useFP16ConversionIntrinsics()) {
-        value = Builder.CreateCall(
-            CGF.CGM.getIntrinsic(llvm::Intrinsic::convert_to_fp16,
-                                 CGF.CGM.FloatTy),
-            value, "incdec.conv");
-      } else {
-        value = Builder.CreateFPTrunc(value, input->getType(), "incdec.conv");
-      }
-    }
-
-  // Fixed-point types.
-  } else if (type->isFixedPointType()) {
-    // Fixed-point types are tricky. In some cases, it isn't possible to
-    // represent a 1 or a -1 in the type at all. Piggyback off of
-    // EmitFixedPointBinOp to avoid having to reimplement saturation.
-    BinOpInfo Info;
-    Info.E = E;
-    Info.Ty = E->getType();
-    Info.Opcode = isInc ? BO_Add : BO_Sub;
-    Info.LHS = value;
-    Info.RHS = llvm::ConstantInt::get(value->getType(), 1, false);
-    // If the type is signed, it's better to represent this as +(-1) or -(-1),
-    // since -1 is guaranteed to be representable.
-    if (type->isSignedFixedPointType()) {
-      Info.Opcode = isInc ? BO_Sub : BO_Add;
-      Info.RHS = Builder.CreateNeg(Info.RHS);
-    }
-    // Now, convert from our invented integer literal to the type of the unary
-    // op. This will upscale and saturate if necessary. This value can become
-    // undef in some cases.
-    llvm::FixedPointBuilder<CGBuilderTy> FPBuilder(Builder);
-    auto DstSema = CGF.getContext().getFixedPointSemantics(Info.Ty);
-    Info.RHS = FPBuilder.CreateIntegerToFixed(Info.RHS, true, DstSema);
-    value = EmitFixedPointBinOp(Info);
-
-  // Objective-C pointer types.
-  } else {
-    const ObjCObjectPointerType *OPT = type->castAs<ObjCObjectPointerType>();
-    value = CGF.EmitCastToVoidPtr(value);
-
-    CharUnits size = CGF.getContext().getTypeSizeInChars(OPT->getObjectType());
-    if (!isInc) size = -size;
-    llvm::Value *sizeValue =
-      llvm::ConstantInt::get(CGF.SizeTy, size.getQuantity());
-
-    if (CGF.getLangOpts().isSignedOverflowDefined())
-      value = Builder.CreateGEP(CGF.Int8Ty, value, sizeValue, "incdec.objptr");
-    else
-      value = CGF.EmitCheckedInBoundsGEP(
-          CGF.Int8Ty, value, sizeValue, /*SignedIndices=*/false, isSubtraction,
-          E->getExprLoc(), "incdec.objptr");
-    value = Builder.CreateBitCast(value, input->getType());
-  }
-
-  if (atomicPHI) {
-    llvm::BasicBlock *curBlock = Builder.GetInsertBlock();
-    llvm::BasicBlock *contBB = CGF.createBasicBlock("atomic_cont", CGF.CurFn);
-    auto Pair = CGF.EmitAtomicCompareExchange(
-        LV, RValue::get(atomicPHI), RValue::get(value), E->getExprLoc());
-    llvm::Value *old = CGF.EmitToMemory(Pair.first.getScalarVal(), type);
-    llvm::Value *success = Pair.second;
-    atomicPHI->addIncoming(old, curBlock);
-    Builder.CreateCondBr(success, contBB, atomicPHI->getParent());
-    Builder.SetInsertPoint(contBB);
-    return isPre ? value : input;
-  }
-
-  // Store the updated result through the lvalue.
-  if (LV.isBitField())
-    CGF.EmitStoreThroughBitfieldLValue(RValue::get(value), LV, &value);
-  else
-    CGF.EmitStoreThroughLValue(RValue::get(value), LV);
-
-  // If this is a postinc, return the value read from memory, otherwise use the
-  // updated value.
-  return isPre ? value : input;
-}
-
-
-
-Value *ScalarExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
-  TestAndClearIgnoreResultAssign();
-  Value *Op = Visit(E->getSubExpr());
-
-  // Generate a unary FNeg for FP ops.
-  if (Op->getType()->isFPOrFPVectorTy())
-    return Builder.CreateFNeg(Op, "fneg");
-
-  // Emit unary minus with EmitSub so we handle overflow cases etc.
-  BinOpInfo BinOp;
-  BinOp.RHS = Op;
-  BinOp.LHS = llvm::Constant::getNullValue(BinOp.RHS->getType());
-  BinOp.Ty = E->getType();
-  BinOp.Opcode = BO_Sub;
-  BinOp.FPFeatures = E->getFPFeaturesInEffect(CGF.getLangOpts());
-  BinOp.E = E;
-  return EmitSub(BinOp);
-}
-
-Value *ScalarExprEmitter::VisitUnaryNot(const UnaryOperator *E) {
-  TestAndClearIgnoreResultAssign();
-  Value *Op = Visit(E->getSubExpr());
-  return Builder.CreateNot(Op, "neg");
-}
-
-Value *ScalarExprEmitter::VisitUnaryLNot(const UnaryOperator *E) {
-  // Perform vector logical not on comparison with zero vector.
-  if (E->getType()->isVectorType() &&
-      E->getType()->castAs<VectorType>()->getVectorKind() ==
-          VectorType::GenericVector) {
-    Value *Oper = Visit(E->getSubExpr());
-    Value *Zero = llvm::Constant::getNullValue(Oper->getType());
-    Value *Result;
-    if (Oper->getType()->isFPOrFPVectorTy()) {
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(
-          CGF, E->getFPFeaturesInEffect(CGF.getLangOpts()));
-      Result = Builder.CreateFCmp(llvm::CmpInst::FCMP_OEQ, Oper, Zero, "cmp");
-    } else
-      Result = Builder.CreateICmp(llvm::CmpInst::ICMP_EQ, Oper, Zero, "cmp");
-    return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext");
-  }
-
-  // Compare operand to zero.
-  Value *BoolVal = CGF.EvaluateExprAsBool(E->getSubExpr());
-
-  // Invert value.
-  // TODO: Could dynamically modify easy computations here.  For example, if
-  // the operand is an icmp ne, turn into icmp eq.
-  BoolVal = Builder.CreateNot(BoolVal, "lnot");
-
-  // ZExt result to the expr type.
-  return Builder.CreateZExt(BoolVal, ConvertType(E->getType()), "lnot.ext");
-}
-
-Value *ScalarExprEmitter::VisitOffsetOfExpr(OffsetOfExpr *E) {
-  // Try folding the offsetof to a constant.
-  Expr::EvalResult EVResult;
-  if (E->EvaluateAsInt(EVResult, CGF.getContext())) {
-    llvm::APSInt Value = EVResult.Val.getInt();
-    return Builder.getInt(Value);
-  }
-
-  // Loop over the components of the offsetof to compute the value.
-  unsigned n = E->getNumComponents();
-  llvm::Type* ResultType = ConvertType(E->getType());
-  llvm::Value* Result = llvm::Constant::getNullValue(ResultType);
-  QualType CurrentType = E->getTypeSourceInfo()->getType();
-  for (unsigned i = 0; i != n; ++i) {
-    OffsetOfNode ON = E->getComponent(i);
-    llvm::Value *Offset = nullptr;
-    switch (ON.getKind()) {
-    case OffsetOfNode::Array: {
-      // Compute the index
-      Expr *IdxExpr = E->getIndexExpr(ON.getArrayExprIndex());
-      llvm::Value* Idx = CGF.EmitScalarExpr(IdxExpr);
-      bool IdxSigned = IdxExpr->getType()->isSignedIntegerOrEnumerationType();
-      Idx = Builder.CreateIntCast(Idx, ResultType, IdxSigned, "conv");
-
-      // Save the element type
-      CurrentType =
-          CGF.getContext().getAsArrayType(CurrentType)->getElementType();
-
-      // Compute the element size
-      llvm::Value* ElemSize = llvm::ConstantInt::get(ResultType,
-          CGF.getContext().getTypeSizeInChars(CurrentType).getQuantity());
-
-      // Multiply out to compute the result
-      Offset = Builder.CreateMul(Idx, ElemSize);
-      break;
-    }
-
-    case OffsetOfNode::Field: {
-      FieldDecl *MemberDecl = ON.getField();
-      RecordDecl *RD = CurrentType->castAs<RecordType>()->getDecl();
-      const ASTRecordLayout &RL = CGF.getContext().getASTRecordLayout(RD);
-
-      // Compute the index of the field in its parent.
-      unsigned i = 0;
-      // FIXME: It would be nice if we didn't have to loop here!
-      for (RecordDecl::field_iterator Field = RD->field_begin(),
-                                      FieldEnd = RD->field_end();
-           Field != FieldEnd; ++Field, ++i) {
-        if (*Field == MemberDecl)
-          break;
-      }
-      assert(i < RL.getFieldCount() && "offsetof field in wrong type");
-
-      // Compute the offset to the field
-      int64_t OffsetInt = RL.getFieldOffset(i) /
-                          CGF.getContext().getCharWidth();
-      Offset = llvm::ConstantInt::get(ResultType, OffsetInt);
-
-      // Save the element type.
-      CurrentType = MemberDecl->getType();
-      break;
-    }
-
-    case OffsetOfNode::Identifier:
-      llvm_unreachable("dependent __builtin_offsetof");
-
-    case OffsetOfNode::Base: {
-      if (ON.getBase()->isVirtual()) {
-        CGF.ErrorUnsupported(E, "virtual base in offsetof");
-        continue;
-      }
-
-      RecordDecl *RD = CurrentType->castAs<RecordType>()->getDecl();
-      const ASTRecordLayout &RL = CGF.getContext().getASTRecordLayout(RD);
-
-      // Save the element type.
-      CurrentType = ON.getBase()->getType();
-
-      // Compute the offset to the base.
-      const RecordType *BaseRT = CurrentType->getAs<RecordType>();
-      CXXRecordDecl *BaseRD = cast<CXXRecordDecl>(BaseRT->getDecl());
-      CharUnits OffsetInt = RL.getBaseClassOffset(BaseRD);
-      Offset = llvm::ConstantInt::get(ResultType, OffsetInt.getQuantity());
-      break;
-    }
-    }
-    Result = Builder.CreateAdd(Result, Offset);
-  }
-  return Result;
-}
-
-/// VisitUnaryExprOrTypeTraitExpr - Return the size or alignment of the type of
-/// argument of the sizeof expression as an integer.
-Value *
-ScalarExprEmitter::VisitUnaryExprOrTypeTraitExpr(
-                              const UnaryExprOrTypeTraitExpr *E) {
-  QualType TypeToSize = E->getTypeOfArgument();
-  if (E->getKind() == UETT_SizeOf) {
-    if (const VariableArrayType *VAT =
-          CGF.getContext().getAsVariableArrayType(TypeToSize)) {
-      if (E->isArgumentType()) {
-        // sizeof(type) - make sure to emit the VLA size.
-        CGF.EmitVariablyModifiedType(TypeToSize);
-      } else {
-        // C99 6.5.3.4p2: If the argument is an expression of type
-        // VLA, it is evaluated.
-        CGF.EmitIgnoredExpr(E->getArgumentExpr());
-      }
-
-      auto VlaSize = CGF.getVLASize(VAT);
-      llvm::Value *size = VlaSize.NumElts;
-
-      // Scale the number of non-VLA elements by the non-VLA element size.
-      CharUnits eltSize = CGF.getContext().getTypeSizeInChars(VlaSize.Type);
-      if (!eltSize.isOne())
-        size = CGF.Builder.CreateNUWMul(CGF.CGM.getSize(eltSize), size);
-
-      return size;
-    }
-  } else if (E->getKind() == UETT_OpenMPRequiredSimdAlign) {
-    auto Alignment =
-        CGF.getContext()
-            .toCharUnitsFromBits(CGF.getContext().getOpenMPDefaultSimdAlign(
-                E->getTypeOfArgument()->getPointeeType()))
-            .getQuantity();
-    return llvm::ConstantInt::get(CGF.SizeTy, Alignment);
-  }
-
-  // If this isn't sizeof(vla), the result must be constant; use the constant
-  // folding logic so we don't have to duplicate it here.
-  return Builder.getInt(E->EvaluateKnownConstInt(CGF.getContext()));
-}
-
-Value *ScalarExprEmitter::VisitUnaryReal(const UnaryOperator *E) {
-  Expr *Op = E->getSubExpr();
-  if (Op->getType()->isAnyComplexType()) {
-    // If it's an l-value, load through the appropriate subobject l-value.
-    // Note that we have to ask E because Op might be an l-value that
-    // this won't work for, e.g. an Obj-C property.
-    if (E->isGLValue())
-      return CGF.EmitLoadOfLValue(CGF.EmitLValue(E),
-                                  E->getExprLoc()).getScalarVal();
-
-    // Otherwise, calculate and project.
-    return CGF.EmitComplexExpr(Op, false, true).first;
-  }
-
-  return Visit(Op);
-}
-
-Value *ScalarExprEmitter::VisitUnaryImag(const UnaryOperator *E) {
-  Expr *Op = E->getSubExpr();
-  if (Op->getType()->isAnyComplexType()) {
-    // If it's an l-value, load through the appropriate subobject l-value.
-    // Note that we have to ask E because Op might be an l-value that
-    // this won't work for, e.g. an Obj-C property.
-    if (Op->isGLValue())
-      return CGF.EmitLoadOfLValue(CGF.EmitLValue(E),
-                                  E->getExprLoc()).getScalarVal();
-
-    // Otherwise, calculate and project.
-    return CGF.EmitComplexExpr(Op, true, false).second;
-  }
-
-  // __imag on a scalar returns zero.  Emit the subexpr to ensure side
-  // effects are evaluated, but not the actual value.
-  if (Op->isGLValue())
-    CGF.EmitLValue(Op);
-  else
-    CGF.EmitScalarExpr(Op, true);
-  return llvm::Constant::getNullValue(ConvertType(E->getType()));
-}
-
-//===----------------------------------------------------------------------===//
-//                           Binary Operators
-//===----------------------------------------------------------------------===//
-
-BinOpInfo ScalarExprEmitter::EmitBinOps(const BinaryOperator *E) {
-  TestAndClearIgnoreResultAssign();
-  BinOpInfo Result;
-  Result.LHS = Visit(E->getLHS());
-  Result.RHS = Visit(E->getRHS());
-  Result.Ty  = E->getType();
-  Result.Opcode = E->getOpcode();
-  Result.FPFeatures = E->getFPFeaturesInEffect(CGF.getLangOpts());
-  Result.E = E;
-  return Result;
-}
-
-LValue ScalarExprEmitter::EmitCompoundAssignLValue(
-                                              const CompoundAssignOperator *E,
-                        Value *(ScalarExprEmitter::*Func)(const BinOpInfo &),
-                                                   Value *&Result) {
-  QualType LHSTy = E->getLHS()->getType();
-  BinOpInfo OpInfo;
-
-  if (E->getComputationResultType()->isAnyComplexType())
-    return CGF.EmitScalarCompoundAssignWithComplex(E, Result);
-
-  // Emit the RHS first.  __block variables need to have the rhs evaluated
-  // first, plus this should improve codegen a little.
-  OpInfo.RHS = Visit(E->getRHS());
-  OpInfo.Ty = E->getComputationResultType();
-  OpInfo.Opcode = E->getOpcode();
-  OpInfo.FPFeatures = E->getFPFeaturesInEffect(CGF.getLangOpts());
-  OpInfo.E = E;
-  // Load/convert the LHS.
-  LValue LHSLV = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store);
-
-  llvm::PHINode *atomicPHI = nullptr;
-  if (const AtomicType *atomicTy = LHSTy->getAs<AtomicType>()) {
-    QualType type = atomicTy->getValueType();
-    if (!type->isBooleanType() && type->isIntegerType() &&
-        !(type->isUnsignedIntegerType() &&
-          CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow)) &&
-        CGF.getLangOpts().getSignedOverflowBehavior() !=
-            LangOptions::SOB_Trapping) {
-      llvm::AtomicRMWInst::BinOp AtomicOp = llvm::AtomicRMWInst::BAD_BINOP;
-      llvm::Instruction::BinaryOps Op;
-      switch (OpInfo.Opcode) {
-        // We don't have atomicrmw operands for *, %, /, <<, >>
-        case BO_MulAssign: case BO_DivAssign:
-        case BO_RemAssign:
-        case BO_ShlAssign:
-        case BO_ShrAssign:
-          break;
-        case BO_AddAssign:
-          AtomicOp = llvm::AtomicRMWInst::Add;
-          Op = llvm::Instruction::Add;
-          break;
-        case BO_SubAssign:
-          AtomicOp = llvm::AtomicRMWInst::Sub;
-          Op = llvm::Instruction::Sub;
-          break;
-        case BO_AndAssign:
-          AtomicOp = llvm::AtomicRMWInst::And;
-          Op = llvm::Instruction::And;
-          break;
-        case BO_XorAssign:
-          AtomicOp = llvm::AtomicRMWInst::Xor;
-          Op = llvm::Instruction::Xor;
-          break;
-        case BO_OrAssign:
-          AtomicOp = llvm::AtomicRMWInst::Or;
-          Op = llvm::Instruction::Or;
-          break;
-        default:
-          llvm_unreachable("Invalid compound assignment type");
-      }
-      if (AtomicOp != llvm::AtomicRMWInst::BAD_BINOP) {
-        llvm::Value *Amt = CGF.EmitToMemory(
-            EmitScalarConversion(OpInfo.RHS, E->getRHS()->getType(), LHSTy,
-                                 E->getExprLoc()),
-            LHSTy);
-        Value *OldVal = Builder.CreateAtomicRMW(
-            AtomicOp, LHSLV.getPointer(CGF), Amt,
-            llvm::AtomicOrdering::SequentiallyConsistent);
-
-        // Since operation is atomic, the result type is guaranteed to be the
-        // same as the input in LLVM terms.
-        Result = Builder.CreateBinOp(Op, OldVal, Amt);
-        return LHSLV;
-      }
-    }
-    // FIXME: For floating point types, we should be saving and restoring the
-    // floating point environment in the loop.
-    llvm::BasicBlock *startBB = Builder.GetInsertBlock();
-    llvm::BasicBlock *opBB = CGF.createBasicBlock("atomic_op", CGF.CurFn);
-    OpInfo.LHS = EmitLoadOfLValue(LHSLV, E->getExprLoc());
-    OpInfo.LHS = CGF.EmitToMemory(OpInfo.LHS, type);
-    Builder.CreateBr(opBB);
-    Builder.SetInsertPoint(opBB);
-    atomicPHI = Builder.CreatePHI(OpInfo.LHS->getType(), 2);
-    atomicPHI->addIncoming(OpInfo.LHS, startBB);
-    OpInfo.LHS = atomicPHI;
-  }
-  else
-    OpInfo.LHS = EmitLoadOfLValue(LHSLV, E->getExprLoc());
-
-  CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, OpInfo.FPFeatures);
-  SourceLocation Loc = E->getExprLoc();
-  OpInfo.LHS =
-      EmitScalarConversion(OpInfo.LHS, LHSTy, E->getComputationLHSType(), Loc);
-
-  // Expand the binary operator.
-  Result = (this->*Func)(OpInfo);
-
-  // Convert the result back to the LHS type,
-  // potentially with Implicit Conversion sanitizer check.
-  Result = EmitScalarConversion(Result, E->getComputationResultType(), LHSTy,
-                                Loc, ScalarConversionOpts(CGF.SanOpts));
-
-  if (atomicPHI) {
-    llvm::BasicBlock *curBlock = Builder.GetInsertBlock();
-    llvm::BasicBlock *contBB = CGF.createBasicBlock("atomic_cont", CGF.CurFn);
-    auto Pair = CGF.EmitAtomicCompareExchange(
-        LHSLV, RValue::get(atomicPHI), RValue::get(Result), E->getExprLoc());
-    llvm::Value *old = CGF.EmitToMemory(Pair.first.getScalarVal(), LHSTy);
-    llvm::Value *success = Pair.second;
-    atomicPHI->addIncoming(old, curBlock);
-    Builder.CreateCondBr(success, contBB, atomicPHI->getParent());
-    Builder.SetInsertPoint(contBB);
-    return LHSLV;
-  }
-
-  // Store the result value into the LHS lvalue. Bit-fields are handled
-  // specially because the result is altered by the store, i.e., [C99 6.5.16p1]
-  // 'An assignment expression has the value of the left operand after the
-  // assignment...'.
-  if (LHSLV.isBitField())
-    CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, &Result);
-  else
-    CGF.EmitStoreThroughLValue(RValue::get(Result), LHSLV);
-
-  if (CGF.getLangOpts().OpenMP)
-    CGF.CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(CGF,
-                                                                  E->getLHS());
-  return LHSLV;
-}
-
-Value *ScalarExprEmitter::EmitCompoundAssign(const CompoundAssignOperator *E,
-                      Value *(ScalarExprEmitter::*Func)(const BinOpInfo &)) {
-  bool Ignore = TestAndClearIgnoreResultAssign();
-  Value *RHS = nullptr;
-  LValue LHS = EmitCompoundAssignLValue(E, Func, RHS);
-
-  // If the result is clearly ignored, return now.
-  if (Ignore)
-    return nullptr;
-
-  // The result of an assignment in C is the assigned r-value.
-  if (!CGF.getLangOpts().CPlusPlus)
-    return RHS;
-
-  // If the lvalue is non-volatile, return the computed value of the assignment.
-  if (!LHS.isVolatileQualified())
-    return RHS;
-
-  // Otherwise, reload the value.
-  return EmitLoadOfLValue(LHS, E->getExprLoc());
-}
-
-void ScalarExprEmitter::EmitUndefinedBehaviorIntegerDivAndRemCheck(
-    const BinOpInfo &Ops, llvm::Value *Zero, bool isDiv) {
-  SmallVector<std::pair<llvm::Value *, SanitizerMask>, 2> Checks;
-
-  if (CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero)) {
-    Checks.push_back(std::make_pair(Builder.CreateICmpNE(Ops.RHS, Zero),
-                                    SanitizerKind::IntegerDivideByZero));
-  }
-
-  const auto *BO = cast<BinaryOperator>(Ops.E);
-  if (CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow) &&
-      Ops.Ty->hasSignedIntegerRepresentation() &&
-      !IsWidenedIntegerOp(CGF.getContext(), BO->getLHS()) &&
-      Ops.mayHaveIntegerOverflow()) {
-    llvm::IntegerType *Ty = cast<llvm::IntegerType>(Zero->getType());
-
-    llvm::Value *IntMin =
-      Builder.getInt(llvm::APInt::getSignedMinValue(Ty->getBitWidth()));
-    llvm::Value *NegOne = llvm::Constant::getAllOnesValue(Ty);
-
-    llvm::Value *LHSCmp = Builder.CreateICmpNE(Ops.LHS, IntMin);
-    llvm::Value *RHSCmp = Builder.CreateICmpNE(Ops.RHS, NegOne);
-    llvm::Value *NotOverflow = Builder.CreateOr(LHSCmp, RHSCmp, "or");
-    Checks.push_back(
-        std::make_pair(NotOverflow, SanitizerKind::SignedIntegerOverflow));
-  }
-
-  if (Checks.size() > 0)
-    EmitBinOpCheck(Checks, Ops);
-}
-
-Value *ScalarExprEmitter::EmitDiv(const BinOpInfo &Ops) {
-  {
-    CodeGenFunction::SanitizerScope SanScope(&CGF);
-    if ((CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero) ||
-         CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) &&
-        Ops.Ty->isIntegerType() &&
-        (Ops.mayHaveIntegerDivisionByZero() || Ops.mayHaveIntegerOverflow())) {
-      llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty));
-      EmitUndefinedBehaviorIntegerDivAndRemCheck(Ops, Zero, true);
-    } else if (CGF.SanOpts.has(SanitizerKind::FloatDivideByZero) &&
-               Ops.Ty->isRealFloatingType() &&
-               Ops.mayHaveFloatDivisionByZero()) {
-      llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty));
-      llvm::Value *NonZero = Builder.CreateFCmpUNE(Ops.RHS, Zero);
-      EmitBinOpCheck(std::make_pair(NonZero, SanitizerKind::FloatDivideByZero),
-                     Ops);
-    }
-  }
-
-  if (Ops.Ty->isConstantMatrixType()) {
-    llvm::MatrixBuilder<CGBuilderTy> MB(Builder);
-    // We need to check the types of the operands of the operator to get the
-    // correct matrix dimensions.
-    auto *BO = cast<BinaryOperator>(Ops.E);
-    (void)BO;
-    assert(
-        isa<ConstantMatrixType>(BO->getLHS()->getType().getCanonicalType()) &&
-        "first operand must be a matrix");
-    assert(BO->getRHS()->getType().getCanonicalType()->isArithmeticType() &&
-           "second operand must be an arithmetic type");
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, Ops.FPFeatures);
-    return MB.CreateScalarDiv(Ops.LHS, Ops.RHS,
-                              Ops.Ty->hasUnsignedIntegerRepresentation());
-  }
-
-  if (Ops.LHS->getType()->isFPOrFPVectorTy()) {
-    llvm::Value *Val;
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, Ops.FPFeatures);
-    Val = Builder.CreateFDiv(Ops.LHS, Ops.RHS, "div");
-    if ((CGF.getLangOpts().OpenCL &&
-         !CGF.CGM.getCodeGenOpts().OpenCLCorrectlyRoundedDivSqrt) ||
-        (CGF.getLangOpts().HIP && CGF.getLangOpts().CUDAIsDevice &&
-         !CGF.CGM.getCodeGenOpts().HIPCorrectlyRoundedDivSqrt)) {
-      // OpenCL v1.1 s7.4: minimum accuracy of single precision / is 2.5ulp
-      // OpenCL v1.2 s5.6.4.2: The -cl-fp32-correctly-rounded-divide-sqrt
-      // build option allows an application to specify that single precision
-      // floating-point divide (x/y and 1/x) and sqrt used in the program
-      // source are correctly rounded.
-      llvm::Type *ValTy = Val->getType();
-      if (ValTy->isFloatTy() ||
-          (isa<llvm::VectorType>(ValTy) &&
-           cast<llvm::VectorType>(ValTy)->getElementType()->isFloatTy()))
-        CGF.SetFPAccuracy(Val, 2.5);
-    }
-    return Val;
-  }
-  else if (Ops.isFixedPointOp())
-    return EmitFixedPointBinOp(Ops);
-  else if (Ops.Ty->hasUnsignedIntegerRepresentation())
-    return Builder.CreateUDiv(Ops.LHS, Ops.RHS, "div");
-  else
-    return Builder.CreateSDiv(Ops.LHS, Ops.RHS, "div");
-}
-
-Value *ScalarExprEmitter::EmitRem(const BinOpInfo &Ops) {
-  // Rem in C can't be a floating point type: C99 6.5.5p2.
-  if ((CGF.SanOpts.has(SanitizerKind::IntegerDivideByZero) ||
-       CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) &&
-      Ops.Ty->isIntegerType() &&
-      (Ops.mayHaveIntegerDivisionByZero() || Ops.mayHaveIntegerOverflow())) {
-    CodeGenFunction::SanitizerScope SanScope(&CGF);
-    llvm::Value *Zero = llvm::Constant::getNullValue(ConvertType(Ops.Ty));
-    EmitUndefinedBehaviorIntegerDivAndRemCheck(Ops, Zero, false);
-  }
-
-  if (Ops.Ty->hasUnsignedIntegerRepresentation())
-    return Builder.CreateURem(Ops.LHS, Ops.RHS, "rem");
-  else
-    return Builder.CreateSRem(Ops.LHS, Ops.RHS, "rem");
-}
-
-Value *ScalarExprEmitter::EmitOverflowCheckedBinOp(const BinOpInfo &Ops) {
-  unsigned IID;
-  unsigned OpID = 0;
-  SanitizerHandler OverflowKind;
-
-  bool isSigned = Ops.Ty->isSignedIntegerOrEnumerationType();
-  switch (Ops.Opcode) {
-  case BO_Add:
-  case BO_AddAssign:
-    OpID = 1;
-    IID = isSigned ? llvm::Intrinsic::sadd_with_overflow :
-                     llvm::Intrinsic::uadd_with_overflow;
-    OverflowKind = SanitizerHandler::AddOverflow;
-    break;
-  case BO_Sub:
-  case BO_SubAssign:
-    OpID = 2;
-    IID = isSigned ? llvm::Intrinsic::ssub_with_overflow :
-                     llvm::Intrinsic::usub_with_overflow;
-    OverflowKind = SanitizerHandler::SubOverflow;
-    break;
-  case BO_Mul:
-  case BO_MulAssign:
-    OpID = 3;
-    IID = isSigned ? llvm::Intrinsic::smul_with_overflow :
-                     llvm::Intrinsic::umul_with_overflow;
-    OverflowKind = SanitizerHandler::MulOverflow;
-    break;
-  default:
-    llvm_unreachable("Unsupported operation for overflow detection");
-  }
-  OpID <<= 1;
-  if (isSigned)
-    OpID |= 1;
-
-  CodeGenFunction::SanitizerScope SanScope(&CGF);
-  llvm::Type *opTy = CGF.CGM.getTypes().ConvertType(Ops.Ty);
-
-  llvm::Function *intrinsic = CGF.CGM.getIntrinsic(IID, opTy);
-
-  Value *resultAndOverflow = Builder.CreateCall(intrinsic, {Ops.LHS, Ops.RHS});
-  Value *result = Builder.CreateExtractValue(resultAndOverflow, 0);
-  Value *overflow = Builder.CreateExtractValue(resultAndOverflow, 1);
-
-  // Handle overflow with llvm.trap if no custom handler has been specified.
-  const std::string *handlerName =
-    &CGF.getLangOpts().OverflowHandler;
-  if (handlerName->empty()) {
-    // If the signed-integer-overflow sanitizer is enabled, emit a call to its
-    // runtime. Otherwise, this is a -ftrapv check, so just emit a trap.
-    if (!isSigned || CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow)) {
-      llvm::Value *NotOverflow = Builder.CreateNot(overflow);
-      SanitizerMask Kind = isSigned ? SanitizerKind::SignedIntegerOverflow
-                              : SanitizerKind::UnsignedIntegerOverflow;
-      EmitBinOpCheck(std::make_pair(NotOverflow, Kind), Ops);
-    } else
-      CGF.EmitTrapCheck(Builder.CreateNot(overflow), OverflowKind);
-    return result;
-  }
-
-  // Branch in case of overflow.
-  llvm::BasicBlock *initialBB = Builder.GetInsertBlock();
-  llvm::BasicBlock *continueBB =
-      CGF.createBasicBlock("nooverflow", CGF.CurFn, initialBB->getNextNode());
-  llvm::BasicBlock *overflowBB = CGF.createBasicBlock("overflow", CGF.CurFn);
-
-  Builder.CreateCondBr(overflow, overflowBB, continueBB);
-
-  // If an overflow handler is set, then we want to call it and then use its
-  // result, if it returns.
-  Builder.SetInsertPoint(overflowBB);
-
-  // Get the overflow handler.
-  llvm::Type *Int8Ty = CGF.Int8Ty;
-  llvm::Type *argTypes[] = { CGF.Int64Ty, CGF.Int64Ty, Int8Ty, Int8Ty };
-  llvm::FunctionType *handlerTy =
-      llvm::FunctionType::get(CGF.Int64Ty, argTypes, true);
-  llvm::FunctionCallee handler =
-      CGF.CGM.CreateRuntimeFunction(handlerTy, *handlerName);
-
-  // Sign extend the args to 64-bit, so that we can use the same handler for
-  // all types of overflow.
-  llvm::Value *lhs = Builder.CreateSExt(Ops.LHS, CGF.Int64Ty);
-  llvm::Value *rhs = Builder.CreateSExt(Ops.RHS, CGF.Int64Ty);
-
-  // Call the handler with the two arguments, the operation, and the size of
-  // the result.
-  llvm::Value *handlerArgs[] = {
-    lhs,
-    rhs,
-    Builder.getInt8(OpID),
-    Builder.getInt8(cast<llvm::IntegerType>(opTy)->getBitWidth())
-  };
-  llvm::Value *handlerResult =
-    CGF.EmitNounwindRuntimeCall(handler, handlerArgs);
-
-  // Truncate the result back to the desired size.
-  handlerResult = Builder.CreateTrunc(handlerResult, opTy);
-  Builder.CreateBr(continueBB);
-
-  Builder.SetInsertPoint(continueBB);
-  llvm::PHINode *phi = Builder.CreatePHI(opTy, 2);
-  phi->addIncoming(result, initialBB);
-  phi->addIncoming(handlerResult, overflowBB);
-
-  return phi;
-}
-
-/// Emit pointer + index arithmetic.
-static Value *emitPointerArithmetic(CodeGenFunction &CGF,
-                                    const BinOpInfo &op,
-                                    bool isSubtraction) {
-  // Must have binary (not unary) expr here.  Unary pointer
-  // increment/decrement doesn't use this path.
-  const BinaryOperator *expr = cast<BinaryOperator>(op.E);
-
-  Value *pointer = op.LHS;
-  Expr *pointerOperand = expr->getLHS();
-  Value *index = op.RHS;
-  Expr *indexOperand = expr->getRHS();
-
-  // In a subtraction, the LHS is always the pointer.
-  if (!isSubtraction && !pointer->getType()->isPointerTy()) {
-    std::swap(pointer, index);
-    std::swap(pointerOperand, indexOperand);
-  }
-
-  bool isSigned = indexOperand->getType()->isSignedIntegerOrEnumerationType();
-
-  unsigned width = cast<llvm::IntegerType>(index->getType())->getBitWidth();
-  auto &DL = CGF.CGM.getDataLayout();
-  auto PtrTy = cast<llvm::PointerType>(pointer->getType());
-
-  // Some versions of glibc and gcc use idioms (particularly in their malloc
-  // routines) that add a pointer-sized integer (known to be a pointer value)
-  // to a null pointer in order to cast the value back to an integer or as
-  // part of a pointer alignment algorithm.  This is undefined behavior, but
-  // we'd like to be able to compile programs that use it.
-  //
-  // Normally, we'd generate a GEP with a null-pointer base here in response
-  // to that code, but it's also UB to dereference a pointer created that
-  // way.  Instead (as an acknowledged hack to tolerate the idiom) we will
-  // generate a direct cast of the integer value to a pointer.
-  //
-  // The idiom (p = nullptr + N) is not met if any of the following are true:
-  //
-  //   The operation is subtraction.
-  //   The index is not pointer-sized.
-  //   The pointer type is not byte-sized.
-  //
-  if (BinaryOperator::isNullPointerArithmeticExtension(CGF.getContext(),
-                                                       op.Opcode,
-                                                       expr->getLHS(),
-                                                       expr->getRHS()))
-    return CGF.Builder.CreateIntToPtr(index, pointer->getType());
-
-  if (width != DL.getIndexTypeSizeInBits(PtrTy)) {
-    // Zero-extend or sign-extend the pointer value according to
-    // whether the index is signed or not.
-    index = CGF.Builder.CreateIntCast(index, DL.getIndexType(PtrTy), isSigned,
-                                      "idx.ext");
-  }
-
-  // If this is subtraction, negate the index.
-  if (isSubtraction)
-    index = CGF.Builder.CreateNeg(index, "idx.neg");
-
-  if (CGF.SanOpts.has(SanitizerKind::ArrayBounds))
-    CGF.EmitBoundsCheck(op.E, pointerOperand, index, indexOperand->getType(),
-                        /*Accessed*/ false);
-
-  const PointerType *pointerType
-    = pointerOperand->getType()->getAs<PointerType>();
-  if (!pointerType) {
-    QualType objectType = pointerOperand->getType()
-                                        ->castAs<ObjCObjectPointerType>()
-                                        ->getPointeeType();
-    llvm::Value *objectSize
-      = CGF.CGM.getSize(CGF.getContext().getTypeSizeInChars(objectType));
-
-    index = CGF.Builder.CreateMul(index, objectSize);
-
-    Value *result = CGF.Builder.CreateBitCast(pointer, CGF.VoidPtrTy);
-    result = CGF.Builder.CreateGEP(CGF.Int8Ty, result, index, "add.ptr");
-    return CGF.Builder.CreateBitCast(result, pointer->getType());
-  }
-
-  QualType elementType = pointerType->getPointeeType();
-  if (const VariableArrayType *vla
-        = CGF.getContext().getAsVariableArrayType(elementType)) {
-    // The element count here is the total number of non-VLA elements.
-    llvm::Value *numElements = CGF.getVLASize(vla).NumElts;
-
-    // Effectively, the multiply by the VLA size is part of the GEP.
-    // GEP indexes are signed, and scaling an index isn't permitted to
-    // signed-overflow, so we use the same semantics for our explicit
-    // multiply.  We suppress this if overflow is not undefined behavior.
-    llvm::Type *elemTy = pointer->getType()->getPointerElementType();
-    if (CGF.getLangOpts().isSignedOverflowDefined()) {
-      index = CGF.Builder.CreateMul(index, numElements, "vla.index");
-      pointer = CGF.Builder.CreateGEP(elemTy, pointer, index, "add.ptr");
-    } else {
-      index = CGF.Builder.CreateNSWMul(index, numElements, "vla.index");
-      pointer = CGF.EmitCheckedInBoundsGEP(
-          elemTy, pointer, index, isSigned, isSubtraction, op.E->getExprLoc(),
-          "add.ptr");
-    }
-    return pointer;
-  }
-
-  // Explicitly handle GNU void* and function pointer arithmetic extensions. The
-  // GNU void* casts amount to no-ops since our void* type is i8*, but this is
-  // future proof.
-  if (elementType->isVoidType() || elementType->isFunctionType()) {
-    Value *result = CGF.EmitCastToVoidPtr(pointer);
-    result = CGF.Builder.CreateGEP(CGF.Int8Ty, result, index, "add.ptr");
-    return CGF.Builder.CreateBitCast(result, pointer->getType());
-  }
-
-  llvm::Type *elemTy = CGF.ConvertTypeForMem(elementType);
-  if (CGF.getLangOpts().isSignedOverflowDefined())
-    return CGF.Builder.CreateGEP(elemTy, pointer, index, "add.ptr");
-
-  return CGF.EmitCheckedInBoundsGEP(
-      elemTy, pointer, index, isSigned, isSubtraction, op.E->getExprLoc(),
-      "add.ptr");
-}
-
-// Construct an fmuladd intrinsic to represent a fused mul-add of MulOp and
-// Addend. Use negMul and negAdd to negate the first operand of the Mul or
-// the add operand respectively. This allows fmuladd to represent a*b-c, or
-// c-a*b. Patterns in LLVM should catch the negated forms and translate them to
-// efficient operations.
-static Value* buildFMulAdd(llvm::Instruction *MulOp, Value *Addend,
-                           const CodeGenFunction &CGF, CGBuilderTy &Builder,
-                           bool negMul, bool negAdd) {
-  assert(!(negMul && negAdd) && "Only one of negMul and negAdd should be set.");
-
-  Value *MulOp0 = MulOp->getOperand(0);
-  Value *MulOp1 = MulOp->getOperand(1);
-  if (negMul)
-    MulOp0 = Builder.CreateFNeg(MulOp0, "neg");
-  if (negAdd)
-    Addend = Builder.CreateFNeg(Addend, "neg");
-
-  Value *FMulAdd = nullptr;
-  if (Builder.getIsFPConstrained()) {
-    assert(isa<llvm::ConstrainedFPIntrinsic>(MulOp) &&
-           "Only constrained operation should be created when Builder is in FP "
-           "constrained mode");
-    FMulAdd = Builder.CreateConstrainedFPCall(
-        CGF.CGM.getIntrinsic(llvm::Intrinsic::experimental_constrained_fmuladd,
-                             Addend->getType()),
-        {MulOp0, MulOp1, Addend});
-  } else {
-    FMulAdd = Builder.CreateCall(
-        CGF.CGM.getIntrinsic(llvm::Intrinsic::fmuladd, Addend->getType()),
-        {MulOp0, MulOp1, Addend});
-  }
-  MulOp->eraseFromParent();
-
-  return FMulAdd;
-}
-
-// Check whether it would be legal to emit an fmuladd intrinsic call to
-// represent op and if so, build the fmuladd.
-//
-// Checks that (a) the operation is fusable, and (b) -ffp-contract=on.
-// Does NOT check the type of the operation - it's assumed that this function
-// will be called from contexts where it's known that the type is contractable.
-static Value* tryEmitFMulAdd(const BinOpInfo &op,
-                         const CodeGenFunction &CGF, CGBuilderTy &Builder,
-                         bool isSub=false) {
-
-  assert((op.Opcode == BO_Add || op.Opcode == BO_AddAssign ||
-          op.Opcode == BO_Sub || op.Opcode == BO_SubAssign) &&
-         "Only fadd/fsub can be the root of an fmuladd.");
-
-  // Check whether this op is marked as fusable.
-  if (!op.FPFeatures.allowFPContractWithinStatement())
-    return nullptr;
-
-  // We have a potentially fusable op. Look for a mul on one of the operands.
-  // Also, make sure that the mul result isn't used directly. In that case,
-  // there's no point creating a muladd operation.
-  if (auto *LHSBinOp = dyn_cast<llvm::BinaryOperator>(op.LHS)) {
-    if (LHSBinOp->getOpcode() == llvm::Instruction::FMul &&
-        LHSBinOp->use_empty())
-      return buildFMulAdd(LHSBinOp, op.RHS, CGF, Builder, false, isSub);
-  }
-  if (auto *RHSBinOp = dyn_cast<llvm::BinaryOperator>(op.RHS)) {
-    if (RHSBinOp->getOpcode() == llvm::Instruction::FMul &&
-        RHSBinOp->use_empty())
-      return buildFMulAdd(RHSBinOp, op.LHS, CGF, Builder, isSub, false);
-  }
-
-  if (auto *LHSBinOp = dyn_cast<llvm::CallBase>(op.LHS)) {
-    if (LHSBinOp->getIntrinsicID() ==
-            llvm::Intrinsic::experimental_constrained_fmul &&
-        LHSBinOp->use_empty())
-      return buildFMulAdd(LHSBinOp, op.RHS, CGF, Builder, false, isSub);
-  }
-  if (auto *RHSBinOp = dyn_cast<llvm::CallBase>(op.RHS)) {
-    if (RHSBinOp->getIntrinsicID() ==
-            llvm::Intrinsic::experimental_constrained_fmul &&
-        RHSBinOp->use_empty())
-      return buildFMulAdd(RHSBinOp, op.LHS, CGF, Builder, isSub, false);
-  }
-
-  return nullptr;
-}
-
-Value *ScalarExprEmitter::EmitAdd(const BinOpInfo &op) {
-  if (op.LHS->getType()->isPointerTy() ||
-      op.RHS->getType()->isPointerTy())
-    return emitPointerArithmetic(CGF, op, CodeGenFunction::NotSubtraction);
-
-  if (op.Ty->isSignedIntegerOrEnumerationType()) {
-    switch (CGF.getLangOpts().getSignedOverflowBehavior()) {
-    case LangOptions::SOB_Defined:
-      return Builder.CreateAdd(op.LHS, op.RHS, "add");
-    case LangOptions::SOB_Undefined:
-      if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow))
-        return Builder.CreateNSWAdd(op.LHS, op.RHS, "add");
-      LLVM_FALLTHROUGH;
-    case LangOptions::SOB_Trapping:
-      if (CanElideOverflowCheck(CGF.getContext(), op))
-        return Builder.CreateNSWAdd(op.LHS, op.RHS, "add");
-      return EmitOverflowCheckedBinOp(op);
-    }
-  }
-
-  if (op.Ty->isConstantMatrixType()) {
-    llvm::MatrixBuilder<CGBuilderTy> MB(Builder);
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, op.FPFeatures);
-    return MB.CreateAdd(op.LHS, op.RHS);
-  }
-
-  if (op.Ty->isUnsignedIntegerType() &&
-      CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow) &&
-      !CanElideOverflowCheck(CGF.getContext(), op))
-    return EmitOverflowCheckedBinOp(op);
-
-  if (op.LHS->getType()->isFPOrFPVectorTy()) {
-    CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, op.FPFeatures);
-    // Try to form an fmuladd.
-    if (Value *FMulAdd = tryEmitFMulAdd(op, CGF, Builder))
-      return FMulAdd;
-
-    return Builder.CreateFAdd(op.LHS, op.RHS, "add");
-  }
-
-  if (op.isFixedPointOp())
-    return EmitFixedPointBinOp(op);
-
-  return Builder.CreateAdd(op.LHS, op.RHS, "add");
-}
-
-/// The resulting value must be calculated with exact precision, so the operands
-/// may not be the same type.
-Value *ScalarExprEmitter::EmitFixedPointBinOp(const BinOpInfo &op) {
-  using llvm::APSInt;
-  using llvm::ConstantInt;
-
-  // This is either a binary operation where at least one of the operands is
-  // a fixed-point type, or a unary operation where the operand is a fixed-point
-  // type. The result type of a binary operation is determined by
-  // Sema::handleFixedPointConversions().
-  QualType ResultTy = op.Ty;
-  QualType LHSTy, RHSTy;
-  if (const auto *BinOp = dyn_cast<BinaryOperator>(op.E)) {
-    RHSTy = BinOp->getRHS()->getType();
-    if (const auto *CAO = dyn_cast<CompoundAssignOperator>(BinOp)) {
-      // For compound assignment, the effective type of the LHS at this point
-      // is the computation LHS type, not the actual LHS type, and the final
-      // result type is not the type of the expression but rather the
-      // computation result type.
-      LHSTy = CAO->getComputationLHSType();
-      ResultTy = CAO->getComputationResultType();
-    } else
-      LHSTy = BinOp->getLHS()->getType();
-  } else if (const auto *UnOp = dyn_cast<UnaryOperator>(op.E)) {
-    LHSTy = UnOp->getSubExpr()->getType();
-    RHSTy = UnOp->getSubExpr()->getType();
-  }
-  ASTContext &Ctx = CGF.getContext();
-  Value *LHS = op.LHS;
-  Value *RHS = op.RHS;
-
-  auto LHSFixedSema = Ctx.getFixedPointSemantics(LHSTy);
-  auto RHSFixedSema = Ctx.getFixedPointSemantics(RHSTy);
-  auto ResultFixedSema = Ctx.getFixedPointSemantics(ResultTy);
-  auto CommonFixedSema = LHSFixedSema.getCommonSemantics(RHSFixedSema);
-
-  // Perform the actual operation.
-  Value *Result;
-  llvm::FixedPointBuilder<CGBuilderTy> FPBuilder(Builder);
-  switch (op.Opcode) {
-  case BO_AddAssign:
-  case BO_Add:
-    Result = FPBuilder.CreateAdd(LHS, LHSFixedSema, RHS, RHSFixedSema);
-    break;
-  case BO_SubAssign:
-  case BO_Sub:
-    Result = FPBuilder.CreateSub(LHS, LHSFixedSema, RHS, RHSFixedSema);
-    break;
-  case BO_MulAssign:
-  case BO_Mul:
-    Result = FPBuilder.CreateMul(LHS, LHSFixedSema, RHS, RHSFixedSema);
-    break;
-  case BO_DivAssign:
-  case BO_Div:
-    Result = FPBuilder.CreateDiv(LHS, LHSFixedSema, RHS, RHSFixedSema);
-    break;
-  case BO_ShlAssign:
-  case BO_Shl:
-    Result = FPBuilder.CreateShl(LHS, LHSFixedSema, RHS);
-    break;
-  case BO_ShrAssign:
-  case BO_Shr:
-    Result = FPBuilder.CreateShr(LHS, LHSFixedSema, RHS);
-    break;
-  case BO_LT:
-    return FPBuilder.CreateLT(LHS, LHSFixedSema, RHS, RHSFixedSema);
-  case BO_GT:
-    return FPBuilder.CreateGT(LHS, LHSFixedSema, RHS, RHSFixedSema);
-  case BO_LE:
-    return FPBuilder.CreateLE(LHS, LHSFixedSema, RHS, RHSFixedSema);
-  case BO_GE:
-    return FPBuilder.CreateGE(LHS, LHSFixedSema, RHS, RHSFixedSema);
-  case BO_EQ:
-    // For equality operations, we assume any padding bits on unsigned types are
-    // zero'd out. They could be overwritten through non-saturating operations
-    // that cause overflow, but this leads to undefined behavior.
-    return FPBuilder.CreateEQ(LHS, LHSFixedSema, RHS, RHSFixedSema);
-  case BO_NE:
-    return FPBuilder.CreateNE(LHS, LHSFixedSema, RHS, RHSFixedSema);
-  case BO_Cmp:
-  case BO_LAnd:
-  case BO_LOr:
-    llvm_unreachable("Found unimplemented fixed point binary operation");
-  case BO_PtrMemD:
-  case BO_PtrMemI:
-  case BO_Rem:
-  case BO_Xor:
-  case BO_And:
-  case BO_Or:
-  case BO_Assign:
-  case BO_RemAssign:
-  case BO_AndAssign:
-  case BO_XorAssign:
-  case BO_OrAssign:
-  case BO_Comma:
-    llvm_unreachable("Found unsupported binary operation for fixed point types.");
-  }
-
-  bool IsShift = BinaryOperator::isShiftOp(op.Opcode) ||
-                 BinaryOperator::isShiftAssignOp(op.Opcode);
-  // Convert to the result type.
-  return FPBuilder.CreateFixedToFixed(Result, IsShift ? LHSFixedSema
-                                                      : CommonFixedSema,
-                                      ResultFixedSema);
-}
-
-Value *ScalarExprEmitter::EmitSub(const BinOpInfo &op) {
-  // The LHS is always a pointer if either side is.
-  if (!op.LHS->getType()->isPointerTy()) {
-    if (op.Ty->isSignedIntegerOrEnumerationType()) {
-      switch (CGF.getLangOpts().getSignedOverflowBehavior()) {
-      case LangOptions::SOB_Defined:
-        return Builder.CreateSub(op.LHS, op.RHS, "sub");
-      case LangOptions::SOB_Undefined:
-        if (!CGF.SanOpts.has(SanitizerKind::SignedIntegerOverflow))
-          return Builder.CreateNSWSub(op.LHS, op.RHS, "sub");
-        LLVM_FALLTHROUGH;
-      case LangOptions::SOB_Trapping:
-        if (CanElideOverflowCheck(CGF.getContext(), op))
-          return Builder.CreateNSWSub(op.LHS, op.RHS, "sub");
-        return EmitOverflowCheckedBinOp(op);
-      }
-    }
-
-    if (op.Ty->isConstantMatrixType()) {
-      llvm::MatrixBuilder<CGBuilderTy> MB(Builder);
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, op.FPFeatures);
-      return MB.CreateSub(op.LHS, op.RHS);
-    }
-
-    if (op.Ty->isUnsignedIntegerType() &&
-        CGF.SanOpts.has(SanitizerKind::UnsignedIntegerOverflow) &&
-        !CanElideOverflowCheck(CGF.getContext(), op))
-      return EmitOverflowCheckedBinOp(op);
-
-    if (op.LHS->getType()->isFPOrFPVectorTy()) {
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, op.FPFeatures);
-      // Try to form an fmuladd.
-      if (Value *FMulAdd = tryEmitFMulAdd(op, CGF, Builder, true))
-        return FMulAdd;
-      return Builder.CreateFSub(op.LHS, op.RHS, "sub");
-    }
-
-    if (op.isFixedPointOp())
-      return EmitFixedPointBinOp(op);
-
-    return Builder.CreateSub(op.LHS, op.RHS, "sub");
-  }
-
-  // If the RHS is not a pointer, then we have normal pointer
-  // arithmetic.
-  if (!op.RHS->getType()->isPointerTy())
-    return emitPointerArithmetic(CGF, op, CodeGenFunction::IsSubtraction);
-
-  // Otherwise, this is a pointer subtraction.
-
-  // Do the raw subtraction part.
-  llvm::Value *LHS
-    = Builder.CreatePtrToInt(op.LHS, CGF.PtrDiffTy, "sub.ptr.lhs.cast");
-  llvm::Value *RHS
-    = Builder.CreatePtrToInt(op.RHS, CGF.PtrDiffTy, "sub.ptr.rhs.cast");
-  Value *diffInChars = Builder.CreateSub(LHS, RHS, "sub.ptr.sub");
-
-  // Okay, figure out the element size.
-  const BinaryOperator *expr = cast<BinaryOperator>(op.E);
-  QualType elementType = expr->getLHS()->getType()->getPointeeType();
-
-  llvm::Value *divisor = nullptr;
-
-  // For a variable-length array, this is going to be non-constant.
-  if (const VariableArrayType *vla
-        = CGF.getContext().getAsVariableArrayType(elementType)) {
-    auto VlaSize = CGF.getVLASize(vla);
-    elementType = VlaSize.Type;
-    divisor = VlaSize.NumElts;
-
-    // Scale the number of non-VLA elements by the non-VLA element size.
-    CharUnits eltSize = CGF.getContext().getTypeSizeInChars(elementType);
-    if (!eltSize.isOne())
-      divisor = CGF.Builder.CreateNUWMul(CGF.CGM.getSize(eltSize), divisor);
-
-  // For everything elese, we can just compute it, safe in the
-  // assumption that Sema won't let anything through that we can't
-  // safely compute the size of.
-  } else {
-    CharUnits elementSize;
-    // Handle GCC extension for pointer arithmetic on void* and
-    // function pointer types.
-    if (elementType->isVoidType() || elementType->isFunctionType())
-      elementSize = CharUnits::One();
-    else
-      elementSize = CGF.getContext().getTypeSizeInChars(elementType);
-
-    // Don't even emit the divide for element size of 1.
-    if (elementSize.isOne())
-      return diffInChars;
-
-    divisor = CGF.CGM.getSize(elementSize);
-  }
-
-  // Otherwise, do a full sdiv. This uses the "exact" form of sdiv, since
-  // pointer difference in C is only defined in the case where both operands
-  // are pointing to elements of an array.
-  return Builder.CreateExactSDiv(diffInChars, divisor, "sub.ptr.div");
-}
-
-Value *ScalarExprEmitter::GetWidthMinusOneValue(Value* LHS,Value* RHS) {
-  llvm::IntegerType *Ty;
-  if (llvm::VectorType *VT = dyn_cast<llvm::VectorType>(LHS->getType()))
-    Ty = cast<llvm::IntegerType>(VT->getElementType());
-  else
-    Ty = cast<llvm::IntegerType>(LHS->getType());
-  return llvm::ConstantInt::get(RHS->getType(), Ty->getBitWidth() - 1);
-}
-
-Value *ScalarExprEmitter::ConstrainShiftValue(Value *LHS, Value *RHS,
-                                              const Twine &Name) {
-  llvm::IntegerType *Ty;
-  if (auto *VT = dyn_cast<llvm::VectorType>(LHS->getType()))
-    Ty = cast<llvm::IntegerType>(VT->getElementType());
-  else
-    Ty = cast<llvm::IntegerType>(LHS->getType());
-
-  if (llvm::isPowerOf2_64(Ty->getBitWidth()))
-        return Builder.CreateAnd(RHS, GetWidthMinusOneValue(LHS, RHS), Name);
-
-  return Builder.CreateURem(
-      RHS, llvm::ConstantInt::get(RHS->getType(), Ty->getBitWidth()), Name);
-}
-
-Value *ScalarExprEmitter::EmitShl(const BinOpInfo &Ops) {
-  // TODO: This misses out on the sanitizer check below.
-  if (Ops.isFixedPointOp())
-    return EmitFixedPointBinOp(Ops);
-
-  // LLVM requires the LHS and RHS to be the same type: promote or truncate the
-  // RHS to the same size as the LHS.
-  Value *RHS = Ops.RHS;
-  if (Ops.LHS->getType() != RHS->getType())
-    RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom");
-
-  bool SanitizeSignedBase = CGF.SanOpts.has(SanitizerKind::ShiftBase) &&
-                            Ops.Ty->hasSignedIntegerRepresentation() &&
-                            !CGF.getLangOpts().isSignedOverflowDefined() &&
-                            !CGF.getLangOpts().CPlusPlus20;
-  bool SanitizeUnsignedBase =
-      CGF.SanOpts.has(SanitizerKind::UnsignedShiftBase) &&
-      Ops.Ty->hasUnsignedIntegerRepresentation();
-  bool SanitizeBase = SanitizeSignedBase || SanitizeUnsignedBase;
-  bool SanitizeExponent = CGF.SanOpts.has(SanitizerKind::ShiftExponent);
-  // OpenCL 6.3j: shift values are effectively % word size of LHS.
-  if (CGF.getLangOpts().OpenCL)
-    RHS = ConstrainShiftValue(Ops.LHS, RHS, "shl.mask");
-  else if ((SanitizeBase || SanitizeExponent) &&
-           isa<llvm::IntegerType>(Ops.LHS->getType())) {
-    CodeGenFunction::SanitizerScope SanScope(&CGF);
-    SmallVector<std::pair<Value *, SanitizerMask>, 2> Checks;
-    llvm::Value *WidthMinusOne = GetWidthMinusOneValue(Ops.LHS, Ops.RHS);
-    llvm::Value *ValidExponent = Builder.CreateICmpULE(Ops.RHS, WidthMinusOne);
-
-    if (SanitizeExponent) {
-      Checks.push_back(
-          std::make_pair(ValidExponent, SanitizerKind::ShiftExponent));
-    }
-
-    if (SanitizeBase) {
-      // Check whether we are shifting any non-zero bits off the top of the
-      // integer. We only emit this check if exponent is valid - otherwise
-      // instructions below will have undefined behavior themselves.
-      llvm::BasicBlock *Orig = Builder.GetInsertBlock();
-      llvm::BasicBlock *Cont = CGF.createBasicBlock("cont");
-      llvm::BasicBlock *CheckShiftBase = CGF.createBasicBlock("check");
-      Builder.CreateCondBr(ValidExponent, CheckShiftBase, Cont);
-      llvm::Value *PromotedWidthMinusOne =
-          (RHS == Ops.RHS) ? WidthMinusOne
-                           : GetWidthMinusOneValue(Ops.LHS, RHS);
-      CGF.EmitBlock(CheckShiftBase);
-      llvm::Value *BitsShiftedOff = Builder.CreateLShr(
-          Ops.LHS, Builder.CreateSub(PromotedWidthMinusOne, RHS, "shl.zeros",
-                                     /*NUW*/ true, /*NSW*/ true),
-          "shl.check");
-      if (SanitizeUnsignedBase || CGF.getLangOpts().CPlusPlus) {
-        // In C99, we are not permitted to shift a 1 bit into the sign bit.
-        // Under C++11's rules, shifting a 1 bit into the sign bit is
-        // OK, but shifting a 1 bit out of it is not. (C89 and C++03 don't
-        // define signed left shifts, so we use the C99 and C++11 rules there).
-        // Unsigned shifts can always shift into the top bit.
-        llvm::Value *One = llvm::ConstantInt::get(BitsShiftedOff->getType(), 1);
-        BitsShiftedOff = Builder.CreateLShr(BitsShiftedOff, One);
-      }
-      llvm::Value *Zero = llvm::ConstantInt::get(BitsShiftedOff->getType(), 0);
-      llvm::Value *ValidBase = Builder.CreateICmpEQ(BitsShiftedOff, Zero);
-      CGF.EmitBlock(Cont);
-      llvm::PHINode *BaseCheck = Builder.CreatePHI(ValidBase->getType(), 2);
-      BaseCheck->addIncoming(Builder.getTrue(), Orig);
-      BaseCheck->addIncoming(ValidBase, CheckShiftBase);
-      Checks.push_back(std::make_pair(
-          BaseCheck, SanitizeSignedBase ? SanitizerKind::ShiftBase
-                                        : SanitizerKind::UnsignedShiftBase));
-    }
-
-    assert(!Checks.empty());
-    EmitBinOpCheck(Checks, Ops);
-  }
-
-  return Builder.CreateShl(Ops.LHS, RHS, "shl");
-}
-
-Value *ScalarExprEmitter::EmitShr(const BinOpInfo &Ops) {
-  // TODO: This misses out on the sanitizer check below.
-  if (Ops.isFixedPointOp())
-    return EmitFixedPointBinOp(Ops);
-
-  // LLVM requires the LHS and RHS to be the same type: promote or truncate the
-  // RHS to the same size as the LHS.
-  Value *RHS = Ops.RHS;
-  if (Ops.LHS->getType() != RHS->getType())
-    RHS = Builder.CreateIntCast(RHS, Ops.LHS->getType(), false, "sh_prom");
-
-  // OpenCL 6.3j: shift values are effectively % word size of LHS.
-  if (CGF.getLangOpts().OpenCL)
-    RHS = ConstrainShiftValue(Ops.LHS, RHS, "shr.mask");
-  else if (CGF.SanOpts.has(SanitizerKind::ShiftExponent) &&
-           isa<llvm::IntegerType>(Ops.LHS->getType())) {
-    CodeGenFunction::SanitizerScope SanScope(&CGF);
-    llvm::Value *Valid =
-        Builder.CreateICmpULE(RHS, GetWidthMinusOneValue(Ops.LHS, RHS));
-    EmitBinOpCheck(std::make_pair(Valid, SanitizerKind::ShiftExponent), Ops);
-  }
-
-  if (Ops.Ty->hasUnsignedIntegerRepresentation())
-    return Builder.CreateLShr(Ops.LHS, RHS, "shr");
-  return Builder.CreateAShr(Ops.LHS, RHS, "shr");
-}
-
-enum IntrinsicType { VCMPEQ, VCMPGT };
-// return corresponding comparison intrinsic for given vector type
-static llvm::Intrinsic::ID GetIntrinsic(IntrinsicType IT,
-                                        BuiltinType::Kind ElemKind) {
-  switch (ElemKind) {
-  default: llvm_unreachable("unexpected element type");
-  case BuiltinType::Char_U:
-  case BuiltinType::UChar:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequb_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtub_p;
-  case BuiltinType::Char_S:
-  case BuiltinType::SChar:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequb_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtsb_p;
-  case BuiltinType::UShort:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequh_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtuh_p;
-  case BuiltinType::Short:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequh_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtsh_p;
-  case BuiltinType::UInt:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequw_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtuw_p;
-  case BuiltinType::Int:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequw_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtsw_p;
-  case BuiltinType::ULong:
-  case BuiltinType::ULongLong:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequd_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtud_p;
-  case BuiltinType::Long:
-  case BuiltinType::LongLong:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequd_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtsd_p;
-  case BuiltinType::Float:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpeqfp_p :
-                            llvm::Intrinsic::ppc_altivec_vcmpgtfp_p;
-  case BuiltinType::Double:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_vsx_xvcmpeqdp_p :
-                            llvm::Intrinsic::ppc_vsx_xvcmpgtdp_p;
-  case BuiltinType::UInt128:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequq_p
-                          : llvm::Intrinsic::ppc_altivec_vcmpgtuq_p;
-  case BuiltinType::Int128:
-    return (IT == VCMPEQ) ? llvm::Intrinsic::ppc_altivec_vcmpequq_p
-                          : llvm::Intrinsic::ppc_altivec_vcmpgtsq_p;
-  }
-}
-
-Value *ScalarExprEmitter::EmitCompare(const BinaryOperator *E,
-                                      llvm::CmpInst::Predicate UICmpOpc,
-                                      llvm::CmpInst::Predicate SICmpOpc,
-                                      llvm::CmpInst::Predicate FCmpOpc,
-                                      bool IsSignaling) {
-  TestAndClearIgnoreResultAssign();
-  Value *Result;
-  QualType LHSTy = E->getLHS()->getType();
-  QualType RHSTy = E->getRHS()->getType();
-  if (const MemberPointerType *MPT = LHSTy->getAs<MemberPointerType>()) {
-    assert(E->getOpcode() == BO_EQ ||
-           E->getOpcode() == BO_NE);
-    Value *LHS = CGF.EmitScalarExpr(E->getLHS());
-    Value *RHS = CGF.EmitScalarExpr(E->getRHS());
-    Result = CGF.CGM.getCXXABI().EmitMemberPointerComparison(
-                   CGF, LHS, RHS, MPT, E->getOpcode() == BO_NE);
-  } else if (!LHSTy->isAnyComplexType() && !RHSTy->isAnyComplexType()) {
-    BinOpInfo BOInfo = EmitBinOps(E);
-    Value *LHS = BOInfo.LHS;
-    Value *RHS = BOInfo.RHS;
-
-    // If AltiVec, the comparison results in a numeric type, so we use
-    // intrinsics comparing vectors and giving 0 or 1 as a result
-    if (LHSTy->isVectorType() && !E->getType()->isVectorType()) {
-      // constants for mapping CR6 register bits to predicate result
-      enum { CR6_EQ=0, CR6_EQ_REV, CR6_LT, CR6_LT_REV } CR6;
-
-      llvm::Intrinsic::ID ID = llvm::Intrinsic::not_intrinsic;
-
-      // in several cases vector arguments order will be reversed
-      Value *FirstVecArg = LHS,
-            *SecondVecArg = RHS;
-
-      QualType ElTy = LHSTy->castAs<VectorType>()->getElementType();
-      BuiltinType::Kind ElementKind = ElTy->castAs<BuiltinType>()->getKind();
-
-      switch(E->getOpcode()) {
-      default: llvm_unreachable("is not a comparison operation");
-      case BO_EQ:
-        CR6 = CR6_LT;
-        ID = GetIntrinsic(VCMPEQ, ElementKind);
-        break;
-      case BO_NE:
-        CR6 = CR6_EQ;
-        ID = GetIntrinsic(VCMPEQ, ElementKind);
-        break;
-      case BO_LT:
-        CR6 = CR6_LT;
-        ID = GetIntrinsic(VCMPGT, ElementKind);
-        std::swap(FirstVecArg, SecondVecArg);
-        break;
-      case BO_GT:
-        CR6 = CR6_LT;
-        ID = GetIntrinsic(VCMPGT, ElementKind);
-        break;
-      case BO_LE:
-        if (ElementKind == BuiltinType::Float) {
-          CR6 = CR6_LT;
-          ID = llvm::Intrinsic::ppc_altivec_vcmpgefp_p;
-          std::swap(FirstVecArg, SecondVecArg);
-        }
-        else {
-          CR6 = CR6_EQ;
-          ID = GetIntrinsic(VCMPGT, ElementKind);
-        }
-        break;
-      case BO_GE:
-        if (ElementKind == BuiltinType::Float) {
-          CR6 = CR6_LT;
-          ID = llvm::Intrinsic::ppc_altivec_vcmpgefp_p;
-        }
-        else {
-          CR6 = CR6_EQ;
-          ID = GetIntrinsic(VCMPGT, ElementKind);
-          std::swap(FirstVecArg, SecondVecArg);
-        }
-        break;
-      }
-
-      Value *CR6Param = Builder.getInt32(CR6);
-      llvm::Function *F = CGF.CGM.getIntrinsic(ID);
-      Result = Builder.CreateCall(F, {CR6Param, FirstVecArg, SecondVecArg});
-
-      // The result type of intrinsic may not be same as E->getType().
-      // If E->getType() is not BoolTy, EmitScalarConversion will do the
-      // conversion work. If E->getType() is BoolTy, EmitScalarConversion will
-      // do nothing, if ResultTy is not i1 at the same time, it will cause
-      // crash later.
-      llvm::IntegerType *ResultTy = cast<llvm::IntegerType>(Result->getType());
-      if (ResultTy->getBitWidth() > 1 &&
-          E->getType() == CGF.getContext().BoolTy)
-        Result = Builder.CreateTrunc(Result, Builder.getInt1Ty());
-      return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType(),
-                                  E->getExprLoc());
-    }
-
-    if (BOInfo.isFixedPointOp()) {
-      Result = EmitFixedPointBinOp(BOInfo);
-    } else if (LHS->getType()->isFPOrFPVectorTy()) {
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(CGF, BOInfo.FPFeatures);
-      if (!IsSignaling)
-        Result = Builder.CreateFCmp(FCmpOpc, LHS, RHS, "cmp");
-      else
-        Result = Builder.CreateFCmpS(FCmpOpc, LHS, RHS, "cmp");
-    } else if (LHSTy->hasSignedIntegerRepresentation()) {
-      Result = Builder.CreateICmp(SICmpOpc, LHS, RHS, "cmp");
-    } else {
-      // Unsigned integers and pointers.
-
-      if (CGF.CGM.getCodeGenOpts().StrictVTablePointers &&
-          !isa<llvm::ConstantPointerNull>(LHS) &&
-          !isa<llvm::ConstantPointerNull>(RHS)) {
-
-        // Dynamic information is required to be stripped for comparisons,
-        // because it could leak the dynamic information.  Based on comparisons
-        // of pointers to dynamic objects, the optimizer can replace one pointer
-        // with another, which might be incorrect in presence of invariant
-        // groups. Comparison with null is safe because null does not carry any
-        // dynamic information.
-        if (LHSTy.mayBeDynamicClass())
-          LHS = Builder.CreateStripInvariantGroup(LHS);
-        if (RHSTy.mayBeDynamicClass())
-          RHS = Builder.CreateStripInvariantGroup(RHS);
-      }
-
-      Result = Builder.CreateICmp(UICmpOpc, LHS, RHS, "cmp");
-    }
-
-    // If this is a vector comparison, sign extend the result to the appropriate
-    // vector integer type and return it (don't convert to bool).
-    if (LHSTy->isVectorType())
-      return Builder.CreateSExt(Result, ConvertType(E->getType()), "sext");
-
-  } else {
-    // Complex Comparison: can only be an equality comparison.
-    CodeGenFunction::ComplexPairTy LHS, RHS;
-    QualType CETy;
-    if (auto *CTy = LHSTy->getAs<ComplexType>()) {
-      LHS = CGF.EmitComplexExpr(E->getLHS());
-      CETy = CTy->getElementType();
-    } else {
-      LHS.first = Visit(E->getLHS());
-      LHS.second = llvm::Constant::getNullValue(LHS.first->getType());
-      CETy = LHSTy;
-    }
-    if (auto *CTy = RHSTy->getAs<ComplexType>()) {
-      RHS = CGF.EmitComplexExpr(E->getRHS());
-      assert(CGF.getContext().hasSameUnqualifiedType(CETy,
-                                                     CTy->getElementType()) &&
-             "The element types must always match.");
-      (void)CTy;
-    } else {
-      RHS.first = Visit(E->getRHS());
-      RHS.second = llvm::Constant::getNullValue(RHS.first->getType());
-      assert(CGF.getContext().hasSameUnqualifiedType(CETy, RHSTy) &&
-             "The element types must always match.");
-    }
-
-    Value *ResultR, *ResultI;
-    if (CETy->isRealFloatingType()) {
-      // As complex comparisons can only be equality comparisons, they
-      // are never signaling comparisons.
-      ResultR = Builder.CreateFCmp(FCmpOpc, LHS.first, RHS.first, "cmp.r");
-      ResultI = Builder.CreateFCmp(FCmpOpc, LHS.second, RHS.second, "cmp.i");
-    } else {
-      // Complex comparisons can only be equality comparisons.  As such, signed
-      // and unsigned opcodes are the same.
-      ResultR = Builder.CreateICmp(UICmpOpc, LHS.first, RHS.first, "cmp.r");
-      ResultI = Builder.CreateICmp(UICmpOpc, LHS.second, RHS.second, "cmp.i");
-    }
-
-    if (E->getOpcode() == BO_EQ) {
-      Result = Builder.CreateAnd(ResultR, ResultI, "and.ri");
-    } else {
-      assert(E->getOpcode() == BO_NE &&
-             "Complex comparison other than == or != ?");
-      Result = Builder.CreateOr(ResultR, ResultI, "or.ri");
-    }
-  }
-
-  return EmitScalarConversion(Result, CGF.getContext().BoolTy, E->getType(),
-                              E->getExprLoc());
-}
-
-Value *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) {
-  bool Ignore = TestAndClearIgnoreResultAssign();
-
-  Value *RHS;
-  LValue LHS;
-
-  switch (E->getLHS()->getType().getObjCLifetime()) {
-  case Qualifiers::OCL_Strong:
-    std::tie(LHS, RHS) = CGF.EmitARCStoreStrong(E, Ignore);
-    break;
-
-  case Qualifiers::OCL_Autoreleasing:
-    std::tie(LHS, RHS) = CGF.EmitARCStoreAutoreleasing(E);
-    break;
-
-  case Qualifiers::OCL_ExplicitNone:
-    std::tie(LHS, RHS) = CGF.EmitARCStoreUnsafeUnretained(E, Ignore);
-    break;
-
-  case Qualifiers::OCL_Weak:
-    RHS = Visit(E->getRHS());
-    LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store);
-    RHS = CGF.EmitARCStoreWeak(LHS.getAddress(CGF), RHS, Ignore);
-    break;
-
-  case Qualifiers::OCL_None:
-    // __block variables need to have the rhs evaluated first, plus
-    // this should improve codegen just a little.
-    RHS = Visit(E->getRHS());
-    LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store);
-
-    // Store the value into the LHS.  Bit-fields are handled specially
-    // because the result is altered by the store, i.e., [C99 6.5.16p1]
-    // 'An assignment expression has the value of the left operand after
-    // the assignment...'.
-    if (LHS.isBitField()) {
-      CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, &RHS);
-    } else {
-      CGF.EmitNullabilityCheck(LHS, RHS, E->getExprLoc());
-      CGF.EmitStoreThroughLValue(RValue::get(RHS), LHS);
-    }
-  }
-
-  // If the result is clearly ignored, return now.
-  if (Ignore)
-    return nullptr;
-
-  // The result of an assignment in C is the assigned r-value.
-  if (!CGF.getLangOpts().CPlusPlus)
-    return RHS;
-
-  // If the lvalue is non-volatile, return the computed value of the assignment.
-  if (!LHS.isVolatileQualified())
-    return RHS;
-
-  // Otherwise, reload the value.
-  return EmitLoadOfLValue(LHS, E->getExprLoc());
-}
-
-Value *ScalarExprEmitter::VisitBinLAnd(const BinaryOperator *E) {
-  // Perform vector logical and on comparisons with zero vectors.
-  if (E->getType()->isVectorType()) {
-    CGF.incrementProfileCounter(E);
-
-    Value *LHS = Visit(E->getLHS());
-    Value *RHS = Visit(E->getRHS());
-    Value *Zero = llvm::ConstantAggregateZero::get(LHS->getType());
-    if (LHS->getType()->isFPOrFPVectorTy()) {
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(
-          CGF, E->getFPFeaturesInEffect(CGF.getLangOpts()));
-      LHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, LHS, Zero, "cmp");
-      RHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, RHS, Zero, "cmp");
-    } else {
-      LHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, LHS, Zero, "cmp");
-      RHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, RHS, Zero, "cmp");
-    }
-    Value *And = Builder.CreateAnd(LHS, RHS);
-    return Builder.CreateSExt(And, ConvertType(E->getType()), "sext");
-  }
-
-  bool InstrumentRegions = CGF.CGM.getCodeGenOpts().hasProfileClangInstr();
-  llvm::Type *ResTy = ConvertType(E->getType());
-
-  // If we have 0 && RHS, see if we can elide RHS, if so, just return 0.
-  // If we have 1 && X, just emit X without inserting the control flow.
-  bool LHSCondVal;
-  if (CGF.ConstantFoldsToSimpleInteger(E->getLHS(), LHSCondVal)) {
-    if (LHSCondVal) { // If we have 1 && X, just emit X.
-      CGF.incrementProfileCounter(E);
-
-      Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS());
-
-      // If we're generating for profiling or coverage, generate a branch to a
-      // block that increments the RHS counter needed to track branch condition
-      // coverage. In this case, use "FBlock" as both the final "TrueBlock" and
-      // "FalseBlock" after the increment is done.
-      if (InstrumentRegions &&
-          CodeGenFunction::isInstrumentedCondition(E->getRHS())) {
-        llvm::BasicBlock *FBlock = CGF.createBasicBlock("land.end");
-        llvm::BasicBlock *RHSBlockCnt = CGF.createBasicBlock("land.rhscnt");
-        Builder.CreateCondBr(RHSCond, RHSBlockCnt, FBlock);
-        CGF.EmitBlock(RHSBlockCnt);
-        CGF.incrementProfileCounter(E->getRHS());
-        CGF.EmitBranch(FBlock);
-        CGF.EmitBlock(FBlock);
-      }
-
-      // ZExt result to int or bool.
-      return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "land.ext");
-    }
-
-    // 0 && RHS: If it is safe, just elide the RHS, and return 0/false.
-    if (!CGF.ContainsLabel(E->getRHS()))
-      return llvm::Constant::getNullValue(ResTy);
-  }
-
-  llvm::BasicBlock *ContBlock = CGF.createBasicBlock("land.end");
-  llvm::BasicBlock *RHSBlock  = CGF.createBasicBlock("land.rhs");
-
-  CodeGenFunction::ConditionalEvaluation eval(CGF);
-
-  // Branch on the LHS first.  If it is false, go to the failure (cont) block.
-  CGF.EmitBranchOnBoolExpr(E->getLHS(), RHSBlock, ContBlock,
-                           CGF.getProfileCount(E->getRHS()));
-
-  // Any edges into the ContBlock are now from an (indeterminate number of)
-  // edges from this first condition.  All of these values will be false.  Start
-  // setting up the PHI node in the Cont Block for this.
-  llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 2,
-                                            "", ContBlock);
-  for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock);
-       PI != PE; ++PI)
-    PN->addIncoming(llvm::ConstantInt::getFalse(VMContext), *PI);
-
-  eval.begin(CGF);
-  CGF.EmitBlock(RHSBlock);
-  CGF.incrementProfileCounter(E);
-  Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS());
-  eval.end(CGF);
-
-  // Reaquire the RHS block, as there may be subblocks inserted.
-  RHSBlock = Builder.GetInsertBlock();
-
-  // If we're generating for profiling or coverage, generate a branch on the
-  // RHS to a block that increments the RHS true counter needed to track branch
-  // condition coverage.
-  if (InstrumentRegions &&
-      CodeGenFunction::isInstrumentedCondition(E->getRHS())) {
-    llvm::BasicBlock *RHSBlockCnt = CGF.createBasicBlock("land.rhscnt");
-    Builder.CreateCondBr(RHSCond, RHSBlockCnt, ContBlock);
-    CGF.EmitBlock(RHSBlockCnt);
-    CGF.incrementProfileCounter(E->getRHS());
-    CGF.EmitBranch(ContBlock);
-    PN->addIncoming(RHSCond, RHSBlockCnt);
-  }
-
-  // Emit an unconditional branch from this block to ContBlock.
-  {
-    // There is no need to emit line number for unconditional branch.
-    auto NL = ApplyDebugLocation::CreateEmpty(CGF);
-    CGF.EmitBlock(ContBlock);
-  }
-  // Insert an entry into the phi node for the edge with the value of RHSCond.
-  PN->addIncoming(RHSCond, RHSBlock);
-
-  // Artificial location to preserve the scope information
-  {
-    auto NL = ApplyDebugLocation::CreateArtificial(CGF);
-    PN->setDebugLoc(Builder.getCurrentDebugLocation());
-  }
-
-  // ZExt result to int.
-  return Builder.CreateZExtOrBitCast(PN, ResTy, "land.ext");
-}
-
-Value *ScalarExprEmitter::VisitBinLOr(const BinaryOperator *E) {
-  // Perform vector logical or on comparisons with zero vectors.
-  if (E->getType()->isVectorType()) {
-    CGF.incrementProfileCounter(E);
-
-    Value *LHS = Visit(E->getLHS());
-    Value *RHS = Visit(E->getRHS());
-    Value *Zero = llvm::ConstantAggregateZero::get(LHS->getType());
-    if (LHS->getType()->isFPOrFPVectorTy()) {
-      CodeGenFunction::CGFPOptionsRAII FPOptsRAII(
-          CGF, E->getFPFeaturesInEffect(CGF.getLangOpts()));
-      LHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, LHS, Zero, "cmp");
-      RHS = Builder.CreateFCmp(llvm::CmpInst::FCMP_UNE, RHS, Zero, "cmp");
-    } else {
-      LHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, LHS, Zero, "cmp");
-      RHS = Builder.CreateICmp(llvm::CmpInst::ICMP_NE, RHS, Zero, "cmp");
-    }
-    Value *Or = Builder.CreateOr(LHS, RHS);
-    return Builder.CreateSExt(Or, ConvertType(E->getType()), "sext");
-  }
-
-  bool InstrumentRegions = CGF.CGM.getCodeGenOpts().hasProfileClangInstr();
-  llvm::Type *ResTy = ConvertType(E->getType());
-
-  // If we have 1 || RHS, see if we can elide RHS, if so, just return 1.
-  // If we have 0 || X, just emit X without inserting the control flow.
-  bool LHSCondVal;
-  if (CGF.ConstantFoldsToSimpleInteger(E->getLHS(), LHSCondVal)) {
-    if (!LHSCondVal) { // If we have 0 || X, just emit X.
-      CGF.incrementProfileCounter(E);
-
-      Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS());
-
-      // If we're generating for profiling or coverage, generate a branch to a
-      // block that increments the RHS counter need to track branch condition
-      // coverage. In this case, use "FBlock" as both the final "TrueBlock" and
-      // "FalseBlock" after the increment is done.
-      if (InstrumentRegions &&
-          CodeGenFunction::isInstrumentedCondition(E->getRHS())) {
-        llvm::BasicBlock *FBlock = CGF.createBasicBlock("lor.end");
-        llvm::BasicBlock *RHSBlockCnt = CGF.createBasicBlock("lor.rhscnt");
-        Builder.CreateCondBr(RHSCond, FBlock, RHSBlockCnt);
-        CGF.EmitBlock(RHSBlockCnt);
-        CGF.incrementProfileCounter(E->getRHS());
-        CGF.EmitBranch(FBlock);
-        CGF.EmitBlock(FBlock);
-      }
-
-      // ZExt result to int or bool.
-      return Builder.CreateZExtOrBitCast(RHSCond, ResTy, "lor.ext");
-    }
-
-    // 1 || RHS: If it is safe, just elide the RHS, and return 1/true.
-    if (!CGF.ContainsLabel(E->getRHS()))
-      return llvm::ConstantInt::get(ResTy, 1);
-  }
-
-  llvm::BasicBlock *ContBlock = CGF.createBasicBlock("lor.end");
-  llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("lor.rhs");
-
-  CodeGenFunction::ConditionalEvaluation eval(CGF);
-
-  // Branch on the LHS first.  If it is true, go to the success (cont) block.
-  CGF.EmitBranchOnBoolExpr(E->getLHS(), ContBlock, RHSBlock,
-                           CGF.getCurrentProfileCount() -
-                               CGF.getProfileCount(E->getRHS()));
-
-  // Any edges into the ContBlock are now from an (indeterminate number of)
-  // edges from this first condition.  All of these values will be true.  Start
-  // setting up the PHI node in the Cont Block for this.
-  llvm::PHINode *PN = llvm::PHINode::Create(llvm::Type::getInt1Ty(VMContext), 2,
-                                            "", ContBlock);
-  for (llvm::pred_iterator PI = pred_begin(ContBlock), PE = pred_end(ContBlock);
-       PI != PE; ++PI)
-    PN->addIncoming(llvm::ConstantInt::getTrue(VMContext), *PI);
-
-  eval.begin(CGF);
-
-  // Emit the RHS condition as a bool value.
-  CGF.EmitBlock(RHSBlock);
-  CGF.incrementProfileCounter(E);
-  Value *RHSCond = CGF.EvaluateExprAsBool(E->getRHS());
-
-  eval.end(CGF);
-
-  // Reaquire the RHS block, as there may be subblocks inserted.
-  RHSBlock = Builder.GetInsertBlock();
-
-  // If we're generating for profiling or coverage, generate a branch on the
-  // RHS to a block that increments the RHS true counter needed to track branch
-  // condition coverage.
-  if (InstrumentRegions &&
-      CodeGenFunction::isInstrumentedCondition(E->getRHS())) {
-    llvm::BasicBlock *RHSBlockCnt = CGF.createBasicBlock("lor.rhscnt");
-    Builder.CreateCondBr(RHSCond, ContBlock, RHSBlockCnt);
-    CGF.EmitBlock(RHSBlockCnt);
-    CGF.incrementProfileCounter(E->getRHS());
-    CGF.EmitBranch(ContBlock);
-    PN->addIncoming(RHSCond, RHSBlockCnt);
-  }
-
-  // Emit an unconditional branch from this block to ContBlock.  Insert an entry
-  // into the phi node for the edge with the value of RHSCond.
-  CGF.EmitBlock(ContBlock);
-  PN->addIncoming(RHSCond, RHSBlock);
-
-  // ZExt result to int.
-  return Builder.CreateZExtOrBitCast(PN, ResTy, "lor.ext");
-}
-
-Value *ScalarExprEmitter::VisitBinComma(const BinaryOperator *E) {
-  CGF.EmitIgnoredExpr(E->getLHS());
-  CGF.EnsureInsertPoint();
-  return Visit(E->getRHS());
-}
-
-//===----------------------------------------------------------------------===//
-//                             Other Operators
-//===----------------------------------------------------------------------===//
-
-/// isCheapEnoughToEvaluateUnconditionally - Return true if the specified
-/// expression is cheap enough and side-effect-free enough to evaluate
-/// unconditionally instead of conditionally.  This is used to convert control
-/// flow into selects in some cases.
-static bool isCheapEnoughToEvaluateUnconditionally(const Expr *E,
-                                                   CodeGenFunction &CGF) {
-  // Anything that is an integer or floating point constant is fine.
-  return E->IgnoreParens()->isEvaluatable(CGF.getContext());
-
-  // Even non-volatile automatic variables can't be evaluated unconditionally.
-  // Referencing a thread_local may cause non-trivial initialization work to
-  // occur. If we're inside a lambda and one of the variables is from the scope
-  // outside the lambda, that function may have returned already. Reading its
-  // locals is a bad idea. Also, these reads may introduce races there didn't
-  // exist in the source-level program.
-}
-
-
-Value *ScalarExprEmitter::
-VisitAbstractConditionalOperator(const AbstractConditionalOperator *E) {
-  TestAndClearIgnoreResultAssign();
-
-  // Bind the common expression if necessary.
-  CodeGenFunction::OpaqueValueMapping binding(CGF, E);
-
-  Expr *condExpr = E->getCond();
-  Expr *lhsExpr = E->getTrueExpr();
-  Expr *rhsExpr = E->getFalseExpr();
-
-  // If the condition constant folds and can be elided, try to avoid emitting
-  // the condition and the dead arm.
-  bool CondExprBool;
-  if (CGF.ConstantFoldsToSimpleInteger(condExpr, CondExprBool)) {
-    Expr *live = lhsExpr, *dead = rhsExpr;
-    if (!CondExprBool) std::swap(live, dead);
-
-    // If the dead side doesn't have labels we need, just emit the Live part.
-    if (!CGF.ContainsLabel(dead)) {
-      if (CondExprBool)
-        CGF.incrementProfileCounter(E);
-      Value *Result = Visit(live);
-
-      // If the live part is a throw expression, it acts like it has a void
-      // type, so evaluating it returns a null Value*.  However, a conditional
-      // with non-void type must return a non-null Value*.
-      if (!Result && !E->getType()->isVoidType())
-        Result = llvm::UndefValue::get(CGF.ConvertType(E->getType()));
-
-      return Result;
-    }
-  }
-
-  // OpenCL: If the condition is a vector, we can treat this condition like
-  // the select function.
-  if ((CGF.getLangOpts().OpenCL && condExpr->getType()->isVectorType()) ||
-      condExpr->getType()->isExtVectorType()) {
-    CGF.incrementProfileCounter(E);
-
-    llvm::Value *CondV = CGF.EmitScalarExpr(condExpr);
-    llvm::Value *LHS = Visit(lhsExpr);
-    llvm::Value *RHS = Visit(rhsExpr);
-
-    llvm::Type *condType = ConvertType(condExpr->getType());
-    auto *vecTy = cast<llvm::FixedVectorType>(condType);
-
-    unsigned numElem = vecTy->getNumElements();
-    llvm::Type *elemType = vecTy->getElementType();
-
-    llvm::Value *zeroVec = llvm::Constant::getNullValue(vecTy);
-    llvm::Value *TestMSB = Builder.CreateICmpSLT(CondV, zeroVec);
-    llvm::Value *tmp = Builder.CreateSExt(
-        TestMSB, llvm::FixedVectorType::get(elemType, numElem), "sext");
-    llvm::Value *tmp2 = Builder.CreateNot(tmp);
-
-    // Cast float to int to perform ANDs if necessary.
-    llvm::Value *RHSTmp = RHS;
-    llvm::Value *LHSTmp = LHS;
-    bool wasCast = false;
-    llvm::VectorType *rhsVTy = cast<llvm::VectorType>(RHS->getType());
-    if (rhsVTy->getElementType()->isFloatingPointTy()) {
-      RHSTmp = Builder.CreateBitCast(RHS, tmp2->getType());
-      LHSTmp = Builder.CreateBitCast(LHS, tmp->getType());
-      wasCast = true;
-    }
-
-    llvm::Value *tmp3 = Builder.CreateAnd(RHSTmp, tmp2);
-    llvm::Value *tmp4 = Builder.CreateAnd(LHSTmp, tmp);
-    llvm::Value *tmp5 = Builder.CreateOr(tmp3, tmp4, "cond");
-    if (wasCast)
-      tmp5 = Builder.CreateBitCast(tmp5, RHS->getType());
-
-    return tmp5;
-  }
-
-  if (condExpr->getType()->isVectorType()) {
-    CGF.incrementProfileCounter(E);
-
-    llvm::Value *CondV = CGF.EmitScalarExpr(condExpr);
-    llvm::Value *LHS = Visit(lhsExpr);
-    llvm::Value *RHS = Visit(rhsExpr);
-
-    llvm::Type *CondType = ConvertType(condExpr->getType());
-    auto *VecTy = cast<llvm::VectorType>(CondType);
-    llvm::Value *ZeroVec = llvm::Constant::getNullValue(VecTy);
-
-    CondV = Builder.CreateICmpNE(CondV, ZeroVec, "vector_cond");
-    return Builder.CreateSelect(CondV, LHS, RHS, "vector_select");
-  }
-
-  // If this is a really simple expression (like x ? 4 : 5), emit this as a
-  // select instead of as control flow.  We can only do this if it is cheap and
-  // safe to evaluate the LHS and RHS unconditionally.
-  if (isCheapEnoughToEvaluateUnconditionally(lhsExpr, CGF) &&
-      isCheapEnoughToEvaluateUnconditionally(rhsExpr, CGF)) {
-    llvm::Value *CondV = CGF.EvaluateExprAsBool(condExpr);
-    llvm::Value *StepV = Builder.CreateZExtOrBitCast(CondV, CGF.Int64Ty);
-
-    CGF.incrementProfileCounter(E, StepV);
-
-    llvm::Value *LHS = Visit(lhsExpr);
-    llvm::Value *RHS = Visit(rhsExpr);
-    if (!LHS) {
-      // If the conditional has void type, make sure we return a null Value*.
-      assert(!RHS && "LHS and RHS types must match");
-      return nullptr;
-    }
-    return Builder.CreateSelect(CondV, LHS, RHS, "cond");
-  }
-
-  llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
-  llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
-  llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");
-
-  CodeGenFunction::ConditionalEvaluation eval(CGF);
-  CGF.EmitBranchOnBoolExpr(condExpr, LHSBlock, RHSBlock,
-                           CGF.getProfileCount(lhsExpr));
-
-  CGF.EmitBlock(LHSBlock);
-  CGF.incrementProfileCounter(E);
-  eval.begin(CGF);
-  Value *LHS = Visit(lhsExpr);
-  eval.end(CGF);
-
-  LHSBlock = Builder.GetInsertBlock();
-  Builder.CreateBr(ContBlock);
-
-  CGF.EmitBlock(RHSBlock);
-  eval.begin(CGF);
-  Value *RHS = Visit(rhsExpr);
-  eval.end(CGF);
-
-  RHSBlock = Builder.GetInsertBlock();
-  CGF.EmitBlock(ContBlock);
-
-  // If the LHS or RHS is a throw expression, it will be legitimately null.
-  if (!LHS)
-    return RHS;
-  if (!RHS)
-    return LHS;
-
-  // Create a PHI node for the real part.
-  llvm::PHINode *PN = Builder.CreatePHI(LHS->getType(), 2, "cond");
-  PN->addIncoming(LHS, LHSBlock);
-  PN->addIncoming(RHS, RHSBlock);
-  return PN;
-}
-
-Value *ScalarExprEmitter::VisitChooseExpr(ChooseExpr *E) {
-  return Visit(E->getChosenSubExpr());
-}
-
-Value *ScalarExprEmitter::VisitVAArgExpr(VAArgExpr *VE) {
-  QualType Ty = VE->getType();
-
-  if (Ty->isVariablyModifiedType())
-    CGF.EmitVariablyModifiedType(Ty);
-
-  Address ArgValue = Address::invalid();
-  Address ArgPtr = CGF.EmitVAArg(VE, ArgValue);
-
-  llvm::Type *ArgTy = ConvertType(VE->getType());
-
-  // If EmitVAArg fails, emit an error.
-  if (!ArgPtr.isValid()) {
-    CGF.ErrorUnsupported(VE, "va_arg expression");
-    return llvm::UndefValue::get(ArgTy);
-  }
-
-  // FIXME Volatility.
-  llvm::Value *Val = Builder.CreateLoad(ArgPtr);
-
-  // If EmitVAArg promoted the type, we must truncate it.
-  if (ArgTy != Val->getType()) {
-    if (ArgTy->isPointerTy() && !Val->getType()->isPointerTy())
-      Val = Builder.CreateIntToPtr(Val, ArgTy);
-    else
-      Val = Builder.CreateTrunc(Val, ArgTy);
-  }
-
-  return Val;
-}
-
-Value *ScalarExprEmitter::VisitBlockExpr(const BlockExpr *block) {
-  return CGF.EmitBlockLiteral(block);
-}
-
-// Convert a vec3 to vec4, or vice versa.
-static Value *ConvertVec3AndVec4(CGBuilderTy &Builder, CodeGenFunction &CGF,
-                                 Value *Src, unsigned NumElementsDst) {
-  static constexpr int Mask[] = {0, 1, 2, -1};
-  return Builder.CreateShuffleVector(Src,
-                                     llvm::makeArrayRef(Mask, NumElementsDst));
-}
-
-// Create cast instructions for converting LLVM value \p Src to LLVM type \p
-// DstTy. \p Src has the same size as \p DstTy. Both are single value types
-// but could be scalar or vectors of different lengths, and either can be
-// pointer.
-// There are 4 cases:
-// 1. non-pointer -> non-pointer  : needs 1 bitcast
-// 2. pointer -> pointer          : needs 1 bitcast or addrspacecast
-// 3. pointer -> non-pointer
-//   a) pointer -> intptr_t       : needs 1 ptrtoint
-//   b) pointer -> non-intptr_t   : needs 1 ptrtoint then 1 bitcast
-// 4. non-pointer -> pointer
-//   a) intptr_t -> pointer       : needs 1 inttoptr
-//   b) non-intptr_t -> pointer   : needs 1 bitcast then 1 inttoptr
-// Note: for cases 3b and 4b two casts are required since LLVM casts do not
-// allow casting directly between pointer types and non-integer non-pointer
-// types.
-static Value *createCastsForTypeOfSameSize(CGBuilderTy &Builder,
-                                           const llvm::DataLayout &DL,
-                                           Value *Src, llvm::Type *DstTy,
-                                           StringRef Name = "") {
-  auto SrcTy = Src->getType();
-
-  // Case 1.
-  if (!SrcTy->isPointerTy() && !DstTy->isPointerTy())
-    return Builder.CreateBitCast(Src, DstTy, Name);
-
-  // Case 2.
-  if (SrcTy->isPointerTy() && DstTy->isPointerTy())
-    return Builder.CreatePointerBitCastOrAddrSpaceCast(Src, DstTy, Name);
-
-  // Case 3.
-  if (SrcTy->isPointerTy() && !DstTy->isPointerTy()) {
-    // Case 3b.
-    if (!DstTy->isIntegerTy())
-      Src = Builder.CreatePtrToInt(Src, DL.getIntPtrType(SrcTy));
-    // Cases 3a and 3b.
-    return Builder.CreateBitOrPointerCast(Src, DstTy, Name);
-  }
-
-  // Case 4b.
-  if (!SrcTy->isIntegerTy())
-    Src = Builder.CreateBitCast(Src, DL.getIntPtrType(DstTy));
-  // Cases 4a and 4b.
-  return Builder.CreateIntToPtr(Src, DstTy, Name);
-}
-
-Value *ScalarExprEmitter::VisitAsTypeExpr(AsTypeExpr *E) {
-  Value *Src  = CGF.EmitScalarExpr(E->getSrcExpr());
-  llvm::Type *DstTy = ConvertType(E->getType());
-
-  llvm::Type *SrcTy = Src->getType();
-  unsigned NumElementsSrc =
-      isa<llvm::VectorType>(SrcTy)
-          ? cast<llvm::FixedVectorType>(SrcTy)->getNumElements()
-          : 0;
-  unsigned NumElementsDst =
-      isa<llvm::VectorType>(DstTy)
-          ? cast<llvm::FixedVectorType>(DstTy)->getNumElements()
-          : 0;
-
-  // Going from vec3 to non-vec3 is a special case and requires a shuffle
-  // vector to get a vec4, then a bitcast if the target type is different.
-  if (NumElementsSrc == 3 && NumElementsDst != 3) {
-    Src = ConvertVec3AndVec4(Builder, CGF, Src, 4);
-    Src = createCastsForTypeOfSameSize(Builder, CGF.CGM.getDataLayout(), Src,
-                                       DstTy);
-
-    Src->setName("astype");
-    return Src;
-  }
-
-  // Going from non-vec3 to vec3 is a special case and requires a bitcast
-  // to vec4 if the original type is not vec4, then a shuffle vector to
-  // get a vec3.
-  if (NumElementsSrc != 3 && NumElementsDst == 3) {
-    auto *Vec4Ty = llvm::FixedVectorType::get(
-        cast<llvm::VectorType>(DstTy)->getElementType(), 4);
-    Src = createCastsForTypeOfSameSize(Builder, CGF.CGM.getDataLayout(), Src,
-                                       Vec4Ty);
-
-    Src = ConvertVec3AndVec4(Builder, CGF, Src, 3);
-    Src->setName("astype");
-    return Src;
-  }
-
-  return createCastsForTypeOfSameSize(Builder, CGF.CGM.getDataLayout(),
-                                      Src, DstTy, "astype");
-}
-
-Value *ScalarExprEmitter::VisitAtomicExpr(AtomicExpr *E) {
-  return CGF.EmitAtomicExpr(E).getScalarVal();
-}
-
-//===----------------------------------------------------------------------===//
-//                         Entry Point into this File
-//===----------------------------------------------------------------------===//
-
-/// Emit the computation of the specified expression of scalar type, ignoring
-/// the result.
-Value *CodeGenFunction::EmitScalarExpr(const Expr *E, bool IgnoreResultAssign) {
-  assert(E && hasScalarEvaluationKind(E->getType()) &&
-         "Invalid scalar expression to emit");
-
-  return ScalarExprEmitter(*this, IgnoreResultAssign)
-      .Visit(const_cast<Expr *>(E));
-}
-
-/// Emit a conversion from the specified type to the specified destination type,
-/// both of which are LLVM scalar types.
-Value *CodeGenFunction::EmitScalarConversion(Value *Src, QualType SrcTy,
-                                             QualType DstTy,
-                                             SourceLocation Loc) {
-  assert(hasScalarEvaluationKind(SrcTy) && hasScalarEvaluationKind(DstTy) &&
-         "Invalid scalar expression to emit");
-  return ScalarExprEmitter(*this).EmitScalarConversion(Src, SrcTy, DstTy, Loc);
-}
-
-/// Emit a conversion from the specified complex type to the specified
-/// destination type, where the destination type is an LLVM scalar type.
-Value *CodeGenFunction::EmitComplexToScalarConversion(ComplexPairTy Src,
-                                                      QualType SrcTy,
-                                                      QualType DstTy,
-                                                      SourceLocation Loc) {
-  assert(SrcTy->isAnyComplexType() && hasScalarEvaluationKind(DstTy) &&
-         "Invalid complex -> scalar conversion");
-  return ScalarExprEmitter(*this)
-      .EmitComplexToScalarConversion(Src, SrcTy, DstTy, Loc);
-}
-
-
-llvm::Value *CodeGenFunction::
-EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
-                        bool isInc, bool isPre) {
-  return ScalarExprEmitter(*this).EmitScalarPrePostIncDec(E, LV, isInc, isPre);
-}
-
-LValue CodeGenFunction::EmitObjCIsaExpr(const ObjCIsaExpr *E) {
-  // object->isa or (*object).isa
-  // Generate code as for: *(Class*)object
-
-  Expr *BaseExpr = E->getBase();
-  Address Addr = Address::invalid();
-  if (BaseExpr->isPRValue()) {
-    Addr = Address(EmitScalarExpr(BaseExpr), getPointerAlign());
-  } else {
-    Addr = EmitLValue(BaseExpr).getAddress(*this);
-  }
-
-  // Cast the address to Class*.
-  Addr = Builder.CreateElementBitCast(Addr, ConvertType(E->getType()));
-  return MakeAddrLValue(Addr, E->getType());
-}
-
-
-LValue CodeGenFunction::EmitCompoundAssignmentLValue(
-                                            const CompoundAssignOperator *E) {
-  ScalarExprEmitter Scalar(*this);
-  Value *Result = nullptr;
-  switch (E->getOpcode()) {
-#define COMPOUND_OP(Op)                                                       \
-    case BO_##Op##Assign:                                                     \
-      return Scalar.EmitCompoundAssignLValue(E, &ScalarExprEmitter::Emit##Op, \
-                                             Result)
-  COMPOUND_OP(Mul);
-  COMPOUND_OP(Div);
-  COMPOUND_OP(Rem);
-  COMPOUND_OP(Add);
-  COMPOUND_OP(Sub);
-  COMPOUND_OP(Shl);
-  COMPOUND_OP(Shr);
-  COMPOUND_OP(And);
-  COMPOUND_OP(Xor);
-  COMPOUND_OP(Or);
-#undef COMPOUND_OP
-
-  case BO_PtrMemD:
-  case BO_PtrMemI:
-  case BO_Mul:
-  case BO_Div:
-  case BO_Rem:
-  case BO_Add:
-  case BO_Sub:
-  case BO_Shl:
-  case BO_Shr:
-  case BO_LT:
-  case BO_GT:
-  case BO_LE:
-  case BO_GE:
-  case BO_EQ:
-  case BO_NE:
-  case BO_Cmp:
-  case BO_And:
-  case BO_Xor:
-  case BO_Or:
-  case BO_LAnd:
-  case BO_LOr:
-  case BO_Assign:
-  case BO_Comma:
-    llvm_unreachable("Not valid compound assignment operators");
-  }
-
-  llvm_unreachable("Unhandled compound assignment operator");
-}
-
-struct GEPOffsetAndOverflow {
-  // The total (signed) byte offset for the GEP.
-  llvm::Value *TotalOffset;
-  // The offset overflow flag - true if the total offset overflows.
-  llvm::Value *OffsetOverflows;
-};
-
-/// Evaluate given GEPVal, which is either an inbounds GEP, or a constant,
-/// and compute the total offset it applies from it's base pointer BasePtr.
-/// Returns offset in bytes and a boolean flag whether an overflow happened
-/// during evaluation.
-static GEPOffsetAndOverflow EmitGEPOffsetInBytes(Value *BasePtr, Value *GEPVal,
-                                                 llvm::LLVMContext &VMContext,
-                                                 CodeGenModule &CGM,
-                                                 CGBuilderTy &Builder) {
-  const auto &DL = CGM.getDataLayout();
-
-  // The total (signed) byte offset for the GEP.
-  llvm::Value *TotalOffset = nullptr;
-
-  // Was the GEP already reduced to a constant?
-  if (isa<llvm::Constant>(GEPVal)) {
-    // Compute the offset by casting both pointers to integers and subtracting:
-    // GEPVal = BasePtr + ptr(Offset) <--> Offset = int(GEPVal) - int(BasePtr)
-    Value *BasePtr_int =
-        Builder.CreatePtrToInt(BasePtr, DL.getIntPtrType(BasePtr->getType()));
-    Value *GEPVal_int =
-        Builder.CreatePtrToInt(GEPVal, DL.getIntPtrType(GEPVal->getType()));
-    TotalOffset = Builder.CreateSub(GEPVal_int, BasePtr_int);
-    return {TotalOffset, /*OffsetOverflows=*/Builder.getFalse()};
-  }
-
-  auto *GEP = cast<llvm::GEPOperator>(GEPVal);
-  assert(GEP->getPointerOperand() == BasePtr &&
-         "BasePtr must be the base of the GEP.");
-  assert(GEP->isInBounds() && "Expected inbounds GEP");
-
-  auto *IntPtrTy = DL.getIntPtrType(GEP->getPointerOperandType());
-
-  // Grab references to the signed add/mul overflow intrinsics for intptr_t.
-  auto *Zero = llvm::ConstantInt::getNullValue(IntPtrTy);
-  auto *SAddIntrinsic =
-      CGM.getIntrinsic(llvm::Intrinsic::sadd_with_overflow, IntPtrTy);
-  auto *SMulIntrinsic =
-      CGM.getIntrinsic(llvm::Intrinsic::smul_with_overflow, IntPtrTy);
-
-  // The offset overflow flag - true if the total offset overflows.
-  llvm::Value *OffsetOverflows = Builder.getFalse();
-
-  /// Return the result of the given binary operation.
-  auto eval = [&](BinaryOperator::Opcode Opcode, llvm::Value *LHS,
-                  llvm::Value *RHS) -> llvm::Value * {
-    assert((Opcode == BO_Add || Opcode == BO_Mul) && "Can't eval binop");
-
-    // If the operands are constants, return a constant result.
-    if (auto *LHSCI = dyn_cast<llvm::ConstantInt>(LHS)) {
-      if (auto *RHSCI = dyn_cast<llvm::ConstantInt>(RHS)) {
-        llvm::APInt N;
-        bool HasOverflow = mayHaveIntegerOverflow(LHSCI, RHSCI, Opcode,
-                                                  /*Signed=*/true, N);
-        if (HasOverflow)
-          OffsetOverflows = Builder.getTrue();
-        return llvm::ConstantInt::get(VMContext, N);
-      }
-    }
-
-    // Otherwise, compute the result with checked arithmetic.
-    auto *ResultAndOverflow = Builder.CreateCall(
-        (Opcode == BO_Add) ? SAddIntrinsic : SMulIntrinsic, {LHS, RHS});
-    OffsetOverflows = Builder.CreateOr(
-        Builder.CreateExtractValue(ResultAndOverflow, 1), OffsetOverflows);
-    return Builder.CreateExtractValue(ResultAndOverflow, 0);
-  };
-
-  // Determine the total byte offset by looking at each GEP operand.
-  for (auto GTI = llvm::gep_type_begin(GEP), GTE = llvm::gep_type_end(GEP);
-       GTI != GTE; ++GTI) {
-    llvm::Value *LocalOffset;
-    auto *Index = GTI.getOperand();
-    // Compute the local offset contributed by this indexing step:
-    if (auto *STy = GTI.getStructTypeOrNull()) {
-      // For struct indexing, the local offset is the byte position of the
-      // specified field.
-      unsigned FieldNo = cast<llvm::ConstantInt>(Index)->getZExtValue();
-      LocalOffset = llvm::ConstantInt::get(
-          IntPtrTy, DL.getStructLayout(STy)->getElementOffset(FieldNo));
-    } else {
-      // Otherwise this is array-like indexing. The local offset is the index
-      // multiplied by the element size.
-      auto *ElementSize = llvm::ConstantInt::get(
-          IntPtrTy, DL.getTypeAllocSize(GTI.getIndexedType()));
-      auto *IndexS = Builder.CreateIntCast(Index, IntPtrTy, /*isSigned=*/true);
-      LocalOffset = eval(BO_Mul, ElementSize, IndexS);
-    }
-
-    // If this is the first offset, set it as the total offset. Otherwise, add
-    // the local offset into the running total.
-    if (!TotalOffset || TotalOffset == Zero)
-      TotalOffset = LocalOffset;
-    else
-      TotalOffset = eval(BO_Add, TotalOffset, LocalOffset);
-  }
-
-  return {TotalOffset, OffsetOverflows};
-}
-
-Value *
-CodeGenFunction::EmitCheckedInBoundsGEP(llvm::Type *ElemTy, Value *Ptr,
-                                        ArrayRef<Value *> IdxList,
-                                        bool SignedIndices, bool IsSubtraction,
-                                        SourceLocation Loc, const Twine &Name) {
-  llvm::Type *PtrTy = Ptr->getType();
-  Value *GEPVal = Builder.CreateInBoundsGEP(ElemTy, Ptr, IdxList, Name);
-
-  // If the pointer overflow sanitizer isn't enabled, do nothing.
-  if (!SanOpts.has(SanitizerKind::PointerOverflow))
-    return GEPVal;
-
-  // Perform nullptr-and-offset check unless the nullptr is defined.
-  bool PerformNullCheck = !NullPointerIsDefined(
-      Builder.GetInsertBlock()->getParent(), PtrTy->getPointerAddressSpace());
-  // Check for overflows unless the GEP got constant-folded,
-  // and only in the default address space
-  bool PerformOverflowCheck =
-      !isa<llvm::Constant>(GEPVal) && PtrTy->getPointerAddressSpace() == 0;
-
-  if (!(PerformNullCheck || PerformOverflowCheck))
-    return GEPVal;
-
-  const auto &DL = CGM.getDataLayout();
-
-  SanitizerScope SanScope(this);
-  llvm::Type *IntPtrTy = DL.getIntPtrType(PtrTy);
-
-  GEPOffsetAndOverflow EvaluatedGEP =
-      EmitGEPOffsetInBytes(Ptr, GEPVal, getLLVMContext(), CGM, Builder);
-
-  assert((!isa<llvm::Constant>(EvaluatedGEP.TotalOffset) ||
-          EvaluatedGEP.OffsetOverflows == Builder.getFalse()) &&
-         "If the offset got constant-folded, we don't expect that there was an "
-         "overflow.");
-
-  auto *Zero = llvm::ConstantInt::getNullValue(IntPtrTy);
-
-  // Common case: if the total offset is zero, and we are using C++ semantics,
-  // where nullptr+0 is defined, don't emit a check.
-  if (EvaluatedGEP.TotalOffset == Zero && CGM.getLangOpts().CPlusPlus)
-    return GEPVal;
-
-  // Now that we've computed the total offset, add it to the base pointer (with
-  // wrapping semantics).
-  auto *IntPtr = Builder.CreatePtrToInt(Ptr, IntPtrTy);
-  auto *ComputedGEP = Builder.CreateAdd(IntPtr, EvaluatedGEP.TotalOffset);
-
-  llvm::SmallVector<std::pair<llvm::Value *, SanitizerMask>, 2> Checks;
-
-  if (PerformNullCheck) {
-    // In C++, if the base pointer evaluates to a null pointer value,
-    // the only valid  pointer this inbounds GEP can produce is also
-    // a null pointer, so the offset must also evaluate to zero.
-    // Likewise, if we have non-zero base pointer, we can not get null pointer
-    // as a result, so the offset can not be -intptr_t(BasePtr).
-    // In other words, both pointers are either null, or both are non-null,
-    // or the behaviour is undefined.
-    //
-    // C, however, is more strict in this regard, and gives more
-    // optimization opportunities: in C, additionally, nullptr+0 is undefined.
-    // So both the input to the 'gep inbounds' AND the output must not be null.
-    auto *BaseIsNotNullptr = Builder.CreateIsNotNull(Ptr);
-    auto *ResultIsNotNullptr = Builder.CreateIsNotNull(ComputedGEP);
-    auto *Valid =
-        CGM.getLangOpts().CPlusPlus
-            ? Builder.CreateICmpEQ(BaseIsNotNullptr, ResultIsNotNullptr)
-            : Builder.CreateAnd(BaseIsNotNullptr, ResultIsNotNullptr);
-    Checks.emplace_back(Valid, SanitizerKind::PointerOverflow);
-  }
-
-  if (PerformOverflowCheck) {
-    // The GEP is valid if:
-    // 1) The total offset doesn't overflow, and
-    // 2) The sign of the difference between the computed address and the base
-    // pointer matches the sign of the total offset.
-    llvm::Value *ValidGEP;
-    auto *NoOffsetOverflow = Builder.CreateNot(EvaluatedGEP.OffsetOverflows);
-    if (SignedIndices) {
-      // GEP is computed as `unsigned base + signed offset`, therefore:
-      // * If offset was positive, then the computed pointer can not be
-      //   [unsigned] less than the base pointer, unless it overflowed.
-      // * If offset was negative, then the computed pointer can not be
-      //   [unsigned] greater than the bas pointere, unless it overflowed.
-      auto *PosOrZeroValid = Builder.CreateICmpUGE(ComputedGEP, IntPtr);
-      auto *PosOrZeroOffset =
-          Builder.CreateICmpSGE(EvaluatedGEP.TotalOffset, Zero);
-      llvm::Value *NegValid = Builder.CreateICmpULT(ComputedGEP, IntPtr);
-      ValidGEP =
-          Builder.CreateSelect(PosOrZeroOffset, PosOrZeroValid, NegValid);
-    } else if (!IsSubtraction) {
-      // GEP is computed as `unsigned base + unsigned offset`,  therefore the
-      // computed pointer can not be [unsigned] less than base pointer,
-      // unless there was an overflow.
-      // Equivalent to `@llvm.uadd.with.overflow(%base, %offset)`.
-      ValidGEP = Builder.CreateICmpUGE(ComputedGEP, IntPtr);
-    } else {
-      // GEP is computed as `unsigned base - unsigned offset`, therefore the
-      // computed pointer can not be [unsigned] greater than base pointer,
-      // unless there was an overflow.
-      // Equivalent to `@llvm.usub.with.overflow(%base, sub(0, %offset))`.
-      ValidGEP = Builder.CreateICmpULE(ComputedGEP, IntPtr);
-    }
-    ValidGEP = Builder.CreateAnd(ValidGEP, NoOffsetOverflow);
-    Checks.emplace_back(ValidGEP, SanitizerKind::PointerOverflow);
-  }
-
-  assert(!Checks.empty() && "Should have produced some checks.");
-
-  llvm::Constant *StaticArgs[] = {EmitCheckSourceLocation(Loc)};
-  // Pass the computed GEP to the runtime to avoid emitting poisoned arguments.
-  llvm::Value *DynamicArgs[] = {IntPtr, ComputedGEP};
-  EmitCheck(Checks, SanitizerHandler::PointerOverflow, StaticArgs, DynamicArgs);
-
-  return GEPVal;
-}