Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 728 insertions, 0 deletions

diff --git a/clang-r353983/include/clang/CodeGen/CGFunctionInfo.h b/clang-r353983/include/clang/CodeGen/CGFunctionInfo.h
new file mode 100644
index 00000000..52157f0c
--- /dev/null
+++ b/clang-r353983/include/clang/CodeGen/CGFunctionInfo.h
@@ -0,0 +1,728 @@
+//==-- CGFunctionInfo.h - Representation of function argument/return types -==//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines CGFunctionInfo and associated types used in representing the
+// LLVM source types and ABI-coerced types for function arguments and
+// return values.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_CODEGEN_CGFUNCTIONINFO_H
+#define LLVM_CLANG_CODEGEN_CGFUNCTIONINFO_H
+
+#include "clang/AST/Attr.h"
+#include "clang/AST/CanonicalType.h"
+#include "clang/AST/CharUnits.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/Type.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/TrailingObjects.h"
+#include <cassert>
+
+namespace clang {
+namespace CodeGen {
+
+/// ABIArgInfo - Helper class to encapsulate information about how a
+/// specific C type should be passed to or returned from a function.
+class ABIArgInfo {
+public:
+  enum Kind : uint8_t {
+    /// Direct - Pass the argument directly using the normal converted LLVM
+    /// type, or by coercing to another specified type stored in
+    /// 'CoerceToType').  If an offset is specified (in UIntData), then the
+    /// argument passed is offset by some number of bytes in the memory
+    /// representation. A dummy argument is emitted before the real argument
+    /// if the specified type stored in "PaddingType" is not zero.
+    Direct,
+
+    /// Extend - Valid only for integer argument types. Same as 'direct'
+    /// but also emit a zero/sign extension attribute.
+    Extend,
+
+    /// Indirect - Pass the argument indirectly via a hidden pointer
+    /// with the specified alignment (0 indicates default alignment).
+    Indirect,
+
+    /// Ignore - Ignore the argument (treat as void). Useful for void and
+    /// empty structs.
+    Ignore,
+
+    /// Expand - Only valid for aggregate argument types. The structure should
+    /// be expanded into consecutive arguments for its constituent fields.
+    /// Currently expand is only allowed on structures whose fields
+    /// are all scalar types or are themselves expandable types.
+    Expand,
+
+    /// CoerceAndExpand - Only valid for aggregate argument types. The
+    /// structure should be expanded into consecutive arguments corresponding
+    /// to the non-array elements of the type stored in CoerceToType.
+    /// Array elements in the type are assumed to be padding and skipped.
+    CoerceAndExpand,
+
+    /// InAlloca - Pass the argument directly using the LLVM inalloca attribute.
+    /// This is similar to indirect with byval, except it only applies to
+    /// arguments stored in memory and forbids any implicit copies.  When
+    /// applied to a return type, it means the value is returned indirectly via
+    /// an implicit sret parameter stored in the argument struct.
+    InAlloca,
+    KindFirst = Direct,
+    KindLast = InAlloca
+  };
+
+private:
+  llvm::Type *TypeData; // canHaveCoerceToType()
+  union {
+    llvm::Type *PaddingType; // canHavePaddingType()
+    llvm::Type *UnpaddedCoerceAndExpandType; // isCoerceAndExpand()
+  };
+  union {
+    unsigned DirectOffset;     // isDirect() || isExtend()
+    unsigned IndirectAlign;    // isIndirect()
+    unsigned AllocaFieldIndex; // isInAlloca()
+  };
+  Kind TheKind;
+  bool PaddingInReg : 1;
+  bool InAllocaSRet : 1;    // isInAlloca()
+  bool IndirectByVal : 1;   // isIndirect()
+  bool IndirectRealign : 1; // isIndirect()
+  bool SRetAfterThis : 1;   // isIndirect()
+  bool InReg : 1;           // isDirect() || isExtend() || isIndirect()
+  bool CanBeFlattened: 1;   // isDirect()
+  bool SignExt : 1;         // isExtend()
+  bool SuppressSRet : 1;    // isIndirect()
+
+  bool canHavePaddingType() const {
+    return isDirect() || isExtend() || isIndirect() || isExpand();
+  }
+  void setPaddingType(llvm::Type *T) {
+    assert(canHavePaddingType());
+    PaddingType = T;
+  }
+
+  void setUnpaddedCoerceToType(llvm::Type *T) {
+    assert(isCoerceAndExpand());
+    UnpaddedCoerceAndExpandType = T;
+  }
+
+  ABIArgInfo(Kind K)
+      : TheKind(K), PaddingInReg(false), InReg(false), SuppressSRet(false) {
+  }
+
+public:
+  ABIArgInfo()
+      : TypeData(nullptr), PaddingType(nullptr), DirectOffset(0),
+        TheKind(Direct), PaddingInReg(false), InReg(false),
+        SuppressSRet(false) {}
+
+  static ABIArgInfo getDirect(llvm::Type *T = nullptr, unsigned Offset = 0,
+                              llvm::Type *Padding = nullptr,
+                              bool CanBeFlattened = true) {
+    auto AI = ABIArgInfo(Direct);
+    AI.setCoerceToType(T);
+    AI.setPaddingType(Padding);
+    AI.setDirectOffset(Offset);
+    AI.setCanBeFlattened(CanBeFlattened);
+    return AI;
+  }
+  static ABIArgInfo getDirectInReg(llvm::Type *T = nullptr) {
+    auto AI = getDirect(T);
+    AI.setInReg(true);
+    return AI;
+  }
+
+  static ABIArgInfo getSignExtend(QualType Ty, llvm::Type *T = nullptr) {
+    assert(Ty->isIntegralOrEnumerationType() && "Unexpected QualType");
+    auto AI = ABIArgInfo(Extend);
+    AI.setCoerceToType(T);
+    AI.setPaddingType(nullptr);
+    AI.setDirectOffset(0);
+    AI.setSignExt(true);
+    return AI;
+  }
+
+  static ABIArgInfo getZeroExtend(QualType Ty, llvm::Type *T = nullptr) {
+    assert(Ty->isIntegralOrEnumerationType() && "Unexpected QualType");
+    auto AI = ABIArgInfo(Extend);
+    AI.setCoerceToType(T);
+    AI.setPaddingType(nullptr);
+    AI.setDirectOffset(0);
+    AI.setSignExt(false);
+    return AI;
+  }
+
+  // ABIArgInfo will record the argument as being extended based on the sign
+  // of its type.
+  static ABIArgInfo getExtend(QualType Ty, llvm::Type *T = nullptr) {
+    assert(Ty->isIntegralOrEnumerationType() && "Unexpected QualType");
+    if (Ty->hasSignedIntegerRepresentation())
+      return getSignExtend(Ty, T);
+    return getZeroExtend(Ty, T);
+  }
+
+  static ABIArgInfo getExtendInReg(QualType Ty, llvm::Type *T = nullptr) {
+    auto AI = getExtend(Ty, T);
+    AI.setInReg(true);
+    return AI;
+  }
+  static ABIArgInfo getIgnore() {
+    return ABIArgInfo(Ignore);
+  }
+  static ABIArgInfo getIndirect(CharUnits Alignment, bool ByVal = true,
+                                bool Realign = false,
+                                llvm::Type *Padding = nullptr) {
+    auto AI = ABIArgInfo(Indirect);
+    AI.setIndirectAlign(Alignment);
+    AI.setIndirectByVal(ByVal);
+    AI.setIndirectRealign(Realign);
+    AI.setSRetAfterThis(false);
+    AI.setPaddingType(Padding);
+    return AI;
+  }
+  static ABIArgInfo getIndirectInReg(CharUnits Alignment, bool ByVal = true,
+                                     bool Realign = false) {
+    auto AI = getIndirect(Alignment, ByVal, Realign);
+    AI.setInReg(true);
+    return AI;
+  }
+  static ABIArgInfo getInAlloca(unsigned FieldIndex) {
+    auto AI = ABIArgInfo(InAlloca);
+    AI.setInAllocaFieldIndex(FieldIndex);
+    return AI;
+  }
+  static ABIArgInfo getExpand() {
+    auto AI = ABIArgInfo(Expand);
+    AI.setPaddingType(nullptr);
+    return AI;
+  }
+  static ABIArgInfo getExpandWithPadding(bool PaddingInReg,
+                                         llvm::Type *Padding) {
+    auto AI = getExpand();
+    AI.setPaddingInReg(PaddingInReg);
+    AI.setPaddingType(Padding);
+    return AI;
+  }
+
+  /// \param unpaddedCoerceToType The coerce-to type with padding elements
+  ///   removed, canonicalized to a single element if it would otherwise
+  ///   have exactly one element.
+  static ABIArgInfo getCoerceAndExpand(llvm::StructType *coerceToType,
+                                       llvm::Type *unpaddedCoerceToType) {
+#ifndef NDEBUG
+    // Sanity checks on unpaddedCoerceToType.
+
+    // Assert that we only have a struct type if there are multiple elements.
+    auto unpaddedStruct = dyn_cast<llvm::StructType>(unpaddedCoerceToType);
+    assert(!unpaddedStruct || unpaddedStruct->getNumElements() != 1);
+
+    // Assert that all the non-padding elements have a corresponding element
+    // in the unpadded type.
+    unsigned unpaddedIndex = 0;
+    for (auto eltType : coerceToType->elements()) {
+      if (isPaddingForCoerceAndExpand(eltType)) continue;
+      if (unpaddedStruct) {
+        assert(unpaddedStruct->getElementType(unpaddedIndex) == eltType);
+      } else {
+        assert(unpaddedIndex == 0 && unpaddedCoerceToType == eltType);
+      }
+      unpaddedIndex++;
+    }
+
+    // Assert that there aren't extra elements in the unpadded type.
+    if (unpaddedStruct) {
+      assert(unpaddedStruct->getNumElements() == unpaddedIndex);
+    } else {
+      assert(unpaddedIndex == 1);
+    }
+#endif
+
+    auto AI = ABIArgInfo(CoerceAndExpand);
+    AI.setCoerceToType(coerceToType);
+    AI.setUnpaddedCoerceToType(unpaddedCoerceToType);
+    return AI;
+  }
+
+  static bool isPaddingForCoerceAndExpand(llvm::Type *eltType) {
+    if (eltType->isArrayTy()) {
+      assert(eltType->getArrayElementType()->isIntegerTy(8));
+      return true;
+    } else {
+      return false;
+    }
+  }
+
+  Kind getKind() const { return TheKind; }
+  bool isDirect() const { return TheKind == Direct; }
+  bool isInAlloca() const { return TheKind == InAlloca; }
+  bool isExtend() const { return TheKind == Extend; }
+  bool isIgnore() const { return TheKind == Ignore; }
+  bool isIndirect() const { return TheKind == Indirect; }
+  bool isExpand() const { return TheKind == Expand; }
+  bool isCoerceAndExpand() const { return TheKind == CoerceAndExpand; }
+
+  bool canHaveCoerceToType() const {
+    return isDirect() || isExtend() || isCoerceAndExpand();
+  }
+
+  // Direct/Extend accessors
+  unsigned getDirectOffset() const {
+    assert((isDirect() || isExtend()) && "Not a direct or extend kind");
+    return DirectOffset;
+  }
+  void setDirectOffset(unsigned Offset) {
+    assert((isDirect() || isExtend()) && "Not a direct or extend kind");
+    DirectOffset = Offset;
+  }
+
+  bool isSignExt() const {
+    assert(isExtend() && "Invalid kind!");
+    return SignExt;
+  }
+  void setSignExt(bool SExt) {
+    assert(isExtend() && "Invalid kind!");
+    SignExt = SExt;
+  }
+
+  llvm::Type *getPaddingType() const {
+    return (canHavePaddingType() ? PaddingType : nullptr);
+  }
+
+  bool getPaddingInReg() const {
+    return PaddingInReg;
+  }
+  void setPaddingInReg(bool PIR) {
+    PaddingInReg = PIR;
+  }
+
+  llvm::Type *getCoerceToType() const {
+    assert(canHaveCoerceToType() && "Invalid kind!");
+    return TypeData;
+  }
+
+  void setCoerceToType(llvm::Type *T) {
+    assert(canHaveCoerceToType() && "Invalid kind!");
+    TypeData = T;
+  }
+
+  llvm::StructType *getCoerceAndExpandType() const {
+    assert(isCoerceAndExpand());
+    return cast<llvm::StructType>(TypeData);
+  }
+
+  llvm::Type *getUnpaddedCoerceAndExpandType() const {
+    assert(isCoerceAndExpand());
+    return UnpaddedCoerceAndExpandType;
+  }
+
+  ArrayRef<llvm::Type *>getCoerceAndExpandTypeSequence() const {
+    assert(isCoerceAndExpand());
+    if (auto structTy =
+          dyn_cast<llvm::StructType>(UnpaddedCoerceAndExpandType)) {
+      return structTy->elements();
+    } else {
+      return llvm::makeArrayRef(&UnpaddedCoerceAndExpandType, 1);
+    }
+  }
+
+  bool getInReg() const {
+    assert((isDirect() || isExtend() || isIndirect()) && "Invalid kind!");
+    return InReg;
+  }
+
+  void setInReg(bool IR) {
+    assert((isDirect() || isExtend() || isIndirect()) && "Invalid kind!");
+    InReg = IR;
+  }
+
+  // Indirect accessors
+  CharUnits getIndirectAlign() const {
+    assert(isIndirect() && "Invalid kind!");
+    return CharUnits::fromQuantity(IndirectAlign);
+  }
+  void setIndirectAlign(CharUnits IA) {
+    assert(isIndirect() && "Invalid kind!");
+    IndirectAlign = IA.getQuantity();
+  }
+
+  bool getIndirectByVal() const {
+    assert(isIndirect() && "Invalid kind!");
+    return IndirectByVal;
+  }
+  void setIndirectByVal(bool IBV) {
+    assert(isIndirect() && "Invalid kind!");
+    IndirectByVal = IBV;
+  }
+
+  bool getIndirectRealign() const {
+    assert(isIndirect() && "Invalid kind!");
+    return IndirectRealign;
+  }
+  void setIndirectRealign(bool IR) {
+    assert(isIndirect() && "Invalid kind!");
+    IndirectRealign = IR;
+  }
+
+  bool isSRetAfterThis() const {
+    assert(isIndirect() && "Invalid kind!");
+    return SRetAfterThis;
+  }
+  void setSRetAfterThis(bool AfterThis) {
+    assert(isIndirect() && "Invalid kind!");
+    SRetAfterThis = AfterThis;
+  }
+
+  unsigned getInAllocaFieldIndex() const {
+    assert(isInAlloca() && "Invalid kind!");
+    return AllocaFieldIndex;
+  }
+  void setInAllocaFieldIndex(unsigned FieldIndex) {
+    assert(isInAlloca() && "Invalid kind!");
+    AllocaFieldIndex = FieldIndex;
+  }
+
+  /// Return true if this field of an inalloca struct should be returned
+  /// to implement a struct return calling convention.
+  bool getInAllocaSRet() const {
+    assert(isInAlloca() && "Invalid kind!");
+    return InAllocaSRet;
+  }
+
+  void setInAllocaSRet(bool SRet) {
+    assert(isInAlloca() && "Invalid kind!");
+    InAllocaSRet = SRet;
+  }
+
+  bool getCanBeFlattened() const {
+    assert(isDirect() && "Invalid kind!");
+    return CanBeFlattened;
+  }
+
+  void setCanBeFlattened(bool Flatten) {
+    assert(isDirect() && "Invalid kind!");
+    CanBeFlattened = Flatten;
+  }
+
+  bool getSuppressSRet() const {
+    assert(isIndirect() && "Invalid kind!");
+    return SuppressSRet;
+  }
+
+  void setSuppressSRet(bool Suppress) {
+    assert(isIndirect() && "Invalid kind!");
+    SuppressSRet = Suppress;
+  }
+
+  void dump() const;
+};
+
+/// A class for recording the number of arguments that a function
+/// signature requires.
+class RequiredArgs {
+  /// The number of required arguments, or ~0 if the signature does
+  /// not permit optional arguments.
+  unsigned NumRequired;
+public:
+  enum All_t { All };
+
+  RequiredArgs(All_t _) : NumRequired(~0U) {}
+  explicit RequiredArgs(unsigned n) : NumRequired(n) {
+    assert(n != ~0U);
+  }
+
+  /// Compute the arguments required by the given formal prototype,
+  /// given that there may be some additional, non-formal arguments
+  /// in play.
+  ///
+  /// If FD is not null, this will consider pass_object_size params in FD.
+  static RequiredArgs forPrototypePlus(const FunctionProtoType *prototype,
+                                       unsigned additional) {
+    if (!prototype->isVariadic()) return All;
+
+    if (prototype->hasExtParameterInfos())
+      additional += llvm::count_if(
+          prototype->getExtParameterInfos(),
+          [](const FunctionProtoType::ExtParameterInfo &ExtInfo) {
+            return ExtInfo.hasPassObjectSize();
+          });
+
+    return RequiredArgs(prototype->getNumParams() + additional);
+  }
+
+  static RequiredArgs forPrototypePlus(CanQual<FunctionProtoType> prototype,
+                                       unsigned additional) {
+    return forPrototypePlus(prototype.getTypePtr(), additional);
+  }
+
+  static RequiredArgs forPrototype(const FunctionProtoType *prototype) {
+    return forPrototypePlus(prototype, 0);
+  }
+
+  static RequiredArgs forPrototype(CanQual<FunctionProtoType> prototype) {
+    return forPrototypePlus(prototype.getTypePtr(), 0);
+  }
+
+  bool allowsOptionalArgs() const { return NumRequired != ~0U; }
+  unsigned getNumRequiredArgs() const {
+    assert(allowsOptionalArgs());
+    return NumRequired;
+  }
+
+  unsigned getOpaqueData() const { return NumRequired; }
+  static RequiredArgs getFromOpaqueData(unsigned value) {
+    if (value == ~0U) return All;
+    return RequiredArgs(value);
+  }
+};
+
+// Implementation detail of CGFunctionInfo, factored out so it can be named
+// in the TrailingObjects base class of CGFunctionInfo.
+struct CGFunctionInfoArgInfo {
+  CanQualType type;
+  ABIArgInfo info;
+};
+
+/// CGFunctionInfo - Class to encapsulate the information about a
+/// function definition.
+class CGFunctionInfo final
+    : public llvm::FoldingSetNode,
+      private llvm::TrailingObjects<CGFunctionInfo, CGFunctionInfoArgInfo,
+                                    FunctionProtoType::ExtParameterInfo> {
+  typedef CGFunctionInfoArgInfo ArgInfo;
+  typedef FunctionProtoType::ExtParameterInfo ExtParameterInfo;
+
+  /// The LLVM::CallingConv to use for this function (as specified by the
+  /// user).
+  unsigned CallingConvention : 8;
+
+  /// The LLVM::CallingConv to actually use for this function, which may
+  /// depend on the ABI.
+  unsigned EffectiveCallingConvention : 8;
+
+  /// The clang::CallingConv that this was originally created with.
+  unsigned ASTCallingConvention : 6;
+
+  /// Whether this is an instance method.
+  unsigned InstanceMethod : 1;
+
+  /// Whether this is a chain call.
+  unsigned ChainCall : 1;
+
+  /// Whether this function is noreturn.
+  unsigned NoReturn : 1;
+
+  /// Whether this function is returns-retained.
+  unsigned ReturnsRetained : 1;
+
+  /// Whether this function saved caller registers.
+  unsigned NoCallerSavedRegs : 1;
+
+  /// How many arguments to pass inreg.
+  unsigned HasRegParm : 1;
+  unsigned RegParm : 3;
+
+  /// Whether this function has nocf_check attribute.
+  unsigned NoCfCheck : 1;
+
+  RequiredArgs Required;
+
+  /// The struct representing all arguments passed in memory.  Only used when
+  /// passing non-trivial types with inalloca.  Not part of the profile.
+  llvm::StructType *ArgStruct;
+  unsigned ArgStructAlign : 31;
+  unsigned HasExtParameterInfos : 1;
+
+  unsigned NumArgs;
+
+  ArgInfo *getArgsBuffer() {
+    return getTrailingObjects<ArgInfo>();
+  }
+  const ArgInfo *getArgsBuffer() const {
+    return getTrailingObjects<ArgInfo>();
+  }
+
+  ExtParameterInfo *getExtParameterInfosBuffer() {
+    return getTrailingObjects<ExtParameterInfo>();
+  }
+  const ExtParameterInfo *getExtParameterInfosBuffer() const{
+    return getTrailingObjects<ExtParameterInfo>();
+  }
+
+  CGFunctionInfo() : Required(RequiredArgs::All) {}
+
+public:
+  static CGFunctionInfo *create(unsigned llvmCC,
+                                bool instanceMethod,
+                                bool chainCall,
+                                const FunctionType::ExtInfo &extInfo,
+                                ArrayRef<ExtParameterInfo> paramInfos,
+                                CanQualType resultType,
+                                ArrayRef<CanQualType> argTypes,
+                                RequiredArgs required);
+  void operator delete(void *p) { ::operator delete(p); }
+
+  // Friending class TrailingObjects is apparently not good enough for MSVC,
+  // so these have to be public.
+  friend class TrailingObjects;
+  size_t numTrailingObjects(OverloadToken<ArgInfo>) const {
+    return NumArgs + 1;
+  }
+  size_t numTrailingObjects(OverloadToken<ExtParameterInfo>) const {
+    return (HasExtParameterInfos ? NumArgs : 0);
+  }
+
+  typedef const ArgInfo *const_arg_iterator;
+  typedef ArgInfo *arg_iterator;
+
+  typedef llvm::iterator_range<arg_iterator> arg_range;
+  typedef llvm::iterator_range<const_arg_iterator> const_arg_range;
+
+  arg_range arguments() { return arg_range(arg_begin(), arg_end()); }
+  const_arg_range arguments() const {
+    return const_arg_range(arg_begin(), arg_end());
+  }
+
+  const_arg_iterator arg_begin() const { return getArgsBuffer() + 1; }
+  const_arg_iterator arg_end() const { return getArgsBuffer() + 1 + NumArgs; }
+  arg_iterator arg_begin() { return getArgsBuffer() + 1; }
+  arg_iterator arg_end() { return getArgsBuffer() + 1 + NumArgs; }
+
+  unsigned  arg_size() const { return NumArgs; }
+
+  bool isVariadic() const { return Required.allowsOptionalArgs(); }
+  RequiredArgs getRequiredArgs() const { return Required; }
+  unsigned getNumRequiredArgs() const {
+    return isVariadic() ? getRequiredArgs().getNumRequiredArgs() : arg_size();
+  }
+
+  bool isInstanceMethod() const { return InstanceMethod; }
+
+  bool isChainCall() const { return ChainCall; }
+
+  bool isNoReturn() const { return NoReturn; }
+
+  /// In ARC, whether this function retains its return value.  This
+  /// is not always reliable for call sites.
+  bool isReturnsRetained() const { return ReturnsRetained; }
+
+  /// Whether this function no longer saves caller registers.
+  bool isNoCallerSavedRegs() const { return NoCallerSavedRegs; }
+
+  /// Whether this function has nocf_check attribute.
+  bool isNoCfCheck() const { return NoCfCheck; }
+
+  /// getASTCallingConvention() - Return the AST-specified calling
+  /// convention.
+  CallingConv getASTCallingConvention() const {
+    return CallingConv(ASTCallingConvention);
+  }
+
+  /// getCallingConvention - Return the user specified calling
+  /// convention, which has been translated into an LLVM CC.
+  unsigned getCallingConvention() const { return CallingConvention; }
+
+  /// getEffectiveCallingConvention - Return the actual calling convention to
+  /// use, which may depend on the ABI.
+  unsigned getEffectiveCallingConvention() const {
+    return EffectiveCallingConvention;
+  }
+  void setEffectiveCallingConvention(unsigned Value) {
+    EffectiveCallingConvention = Value;
+  }
+
+  bool getHasRegParm() const { return HasRegParm; }
+  unsigned getRegParm() const { return RegParm; }
+
+  FunctionType::ExtInfo getExtInfo() const {
+    return FunctionType::ExtInfo(isNoReturn(), getHasRegParm(), getRegParm(),
+                                 getASTCallingConvention(), isReturnsRetained(),
+                                 isNoCallerSavedRegs(), isNoCfCheck());
+  }
+
+  CanQualType getReturnType() const { return getArgsBuffer()[0].type; }
+
+  ABIArgInfo &getReturnInfo() { return getArgsBuffer()[0].info; }
+  const ABIArgInfo &getReturnInfo() const { return getArgsBuffer()[0].info; }
+
+  ArrayRef<ExtParameterInfo> getExtParameterInfos() const {
+    if (!HasExtParameterInfos) return {};
+    return llvm::makeArrayRef(getExtParameterInfosBuffer(), NumArgs);
+  }
+  ExtParameterInfo getExtParameterInfo(unsigned argIndex) const {
+    assert(argIndex <= NumArgs);
+    if (!HasExtParameterInfos) return ExtParameterInfo();
+    return getExtParameterInfos()[argIndex];
+  }
+
+  /// Return true if this function uses inalloca arguments.
+  bool usesInAlloca() const { return ArgStruct; }
+
+  /// Get the struct type used to represent all the arguments in memory.
+  llvm::StructType *getArgStruct() const { return ArgStruct; }
+  CharUnits getArgStructAlignment() const {
+    return CharUnits::fromQuantity(ArgStructAlign);
+  }
+  void setArgStruct(llvm::StructType *Ty, CharUnits Align) {
+    ArgStruct = Ty;
+    ArgStructAlign = Align.getQuantity();
+  }
+
+  void Profile(llvm::FoldingSetNodeID &ID) {
+    ID.AddInteger(getASTCallingConvention());
+    ID.AddBoolean(InstanceMethod);
+    ID.AddBoolean(ChainCall);
+    ID.AddBoolean(NoReturn);
+    ID.AddBoolean(ReturnsRetained);
+    ID.AddBoolean(NoCallerSavedRegs);
+    ID.AddBoolean(HasRegParm);
+    ID.AddInteger(RegParm);
+    ID.AddBoolean(NoCfCheck);
+    ID.AddInteger(Required.getOpaqueData());
+    ID.AddBoolean(HasExtParameterInfos);
+    if (HasExtParameterInfos) {
+      for (auto paramInfo : getExtParameterInfos())
+        ID.AddInteger(paramInfo.getOpaqueValue());
+    }
+    getReturnType().Profile(ID);
+    for (const auto &I : arguments())
+      I.type.Profile(ID);
+  }
+  static void Profile(llvm::FoldingSetNodeID &ID,
+                      bool InstanceMethod,
+                      bool ChainCall,
+                      const FunctionType::ExtInfo &info,
+                      ArrayRef<ExtParameterInfo> paramInfos,
+                      RequiredArgs required,
+                      CanQualType resultType,
+                      ArrayRef<CanQualType> argTypes) {
+    ID.AddInteger(info.getCC());
+    ID.AddBoolean(InstanceMethod);
+    ID.AddBoolean(ChainCall);
+    ID.AddBoolean(info.getNoReturn());
+    ID.AddBoolean(info.getProducesResult());
+    ID.AddBoolean(info.getNoCallerSavedRegs());
+    ID.AddBoolean(info.getHasRegParm());
+    ID.AddInteger(info.getRegParm());
+    ID.AddBoolean(info.getNoCfCheck());
+    ID.AddInteger(required.getOpaqueData());
+    ID.AddBoolean(!paramInfos.empty());
+    if (!paramInfos.empty()) {
+      for (auto paramInfo : paramInfos)
+        ID.AddInteger(paramInfo.getOpaqueValue());
+    }
+    resultType.Profile(ID);
+    for (ArrayRef<CanQualType>::iterator
+           i = argTypes.begin(), e = argTypes.end(); i != e; ++i) {
+      i->Profile(ID);
+    }
+  }
+};
+
+}  // end namespace CodeGen
+}  // end namespace clang
+
+#endif