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Builtins.cpp
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//===--- Builtins.cpp - Swift Language Builtin ASTs -----------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file implements the interface to the Builtin APIs.
//
//===----------------------------------------------------------------------===//
#include "swift/AST/Builtins.h"
#include "swift/AST/ASTContext.h"
#include "swift/AST/ASTSynthesis.h"
#include "swift/AST/ConformanceLookup.h"
#include "swift/AST/FileUnit.h"
#include "swift/AST/Module.h"
#include "swift/AST/ParameterList.h"
#include "swift/AST/TypeCheckRequests.h"
#include "swift/AST/Types.h"
#include "swift/Basic/Assertions.h"
#include "swift/Strings.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/Support/ManagedStatic.h"
#include <tuple>
using namespace swift;
struct BuiltinExtraInfoTy {
const char *Attributes;
};
static const BuiltinExtraInfoTy BuiltinExtraInfo[] = {
{nullptr},
#define BUILTIN(Id, Name, Attrs) {Attrs},
#include "swift/AST/Builtins.def"
};
bool BuiltinInfo::isReadNone() const {
return strchr(BuiltinExtraInfo[(unsigned)ID].Attributes, 'n') != nullptr;
}
const llvm::AttributeList &
IntrinsicInfo::getOrCreateAttributes(ASTContext &Ctx) const {
using DenseMapInfo = llvm::DenseMapInfo<llvm::AttributeList>;
if (DenseMapInfo::isEqual(Attrs, DenseMapInfo::getEmptyKey())) {
Attrs = llvm::Intrinsic::getAttributes(Ctx.getIntrinsicScratchContext(), ID);
}
return Attrs;
}
Type swift::getBuiltinType(ASTContext &Context, StringRef Name) {
if (Name == "FixedArray") {
return BuiltinUnboundGenericType::get(TypeKind::BuiltinFixedArray, Context);
}
// Vectors are VecNxT, where "N" is the number of elements and
// T is the element type.
if (Name.starts_with("Vec")) {
Name = Name.substr(3);
StringRef::size_type xPos = Name.find('x');
if (xPos == StringRef::npos)
return Type();
unsigned numElements;
if (Name.substr(0, xPos).getAsInteger(10, numElements) ||
numElements == 0 || numElements > 1024)
return Type();
Type elementType = getBuiltinType(Context, Name.substr(xPos + 1));
if (!elementType)
return Type();
return BuiltinVectorType::get(Context, elementType, numElements);
}
if (Name == "RawPointer")
return Context.TheRawPointerType;
if (Name == "RawUnsafeContinuation")
return Context.TheRawUnsafeContinuationType;
if (Name == "Job")
return Context.TheJobType;
if (Name == "DefaultActorStorage")
return Context.TheDefaultActorStorageType;
if (Name == "NonDefaultDistributedActorStorage")
return Context.TheNonDefaultDistributedActorStorageType;
if (Name == "Executor")
return Context.TheExecutorType;
if (Name == "NativeObject")
return Context.TheNativeObjectType;
if (Name == "BridgeObject")
return Context.TheBridgeObjectType;
if (Name == "SILToken")
return Context.TheSILTokenType;
if (Name == "UnsafeValueBuffer")
return Context.TheUnsafeValueBufferType;
if (Name == "PackIndex")
return Context.ThePackIndexType;
if (Name == "FPIEEE32")
return Context.TheIEEE32Type;
if (Name == "FPIEEE64")
return Context.TheIEEE64Type;
if (Name == "Word")
return BuiltinIntegerType::getWordType(Context);
if (Name == "IntLiteral")
return Context.TheIntegerLiteralType;
if (Name == "Int") {
return BuiltinUnboundGenericType::get(TypeKind::BuiltinInteger, Context);
}
// Handle 'int8' and friends.
if (Name.substr(0, 3) == "Int") {
unsigned BitWidth;
if (!Name.substr(3).getAsInteger(10, BitWidth) &&
BitWidth <= 2048 && BitWidth != 0) // Cap to prevent unsound things.
return BuiltinIntegerType::get(BitWidth, Context);
}
// Target specific FP types.
if (Name == "FPIEEE16")
return Context.TheIEEE16Type;
if (Name == "FPIEEE80")
return Context.TheIEEE80Type;
if (Name == "FPIEEE128")
return Context.TheIEEE128Type;
if (Name == "FPPPC128")
return Context.ThePPC128Type;
// AnyObject is the empty class-constrained existential.
if (Name == "AnyObject")
return CanType(
ProtocolCompositionType::theAnyObjectType(Context));
return Type();
}
/// getBuiltinBaseName - Decode the type list of a builtin (e.g. mul_Int32) and
/// return the base name (e.g. "mul").
StringRef swift::getBuiltinBaseName(ASTContext &C, StringRef Name,
SmallVectorImpl<Type> &Types) {
// builtin-id ::= operation-id ('_' type-id)*
for (StringRef::size_type Underscore = Name.find_last_of('_');
Underscore != StringRef::npos; Underscore = Name.find_last_of('_')) {
// Check that the type parameter is well-formed and set it up for returning.
// This allows operations with underscores in them, like "icmp_eq".
Type Ty = getBuiltinType(C, Name.substr(Underscore + 1));
if (Ty.isNull()) break;
Types.push_back(Ty);
Name = Name.substr(0, Underscore);
}
std::reverse(Types.begin(), Types.end());
return Name;
}
namespace {
/// AST synthesizers (see ASTSynthesis.h for the general pattern)
/// for generics.
enum UnrestrictedGenericParam { _unrestricted };
/// A synthesizer which generates a conformance requirement.
template <class TypeS, class ProtocolS>
struct ConformsToSynthesizer {
TypeS Type;
ProtocolS Protocol;
};
template <class TypeS, class ProtocolS>
constexpr ConformsToSynthesizer<TypeS, ProtocolS>
_conformsTo(TypeS type, ProtocolS protocol) {
return {type, protocol};
}
// Convenience macro to say that a type parameter has default
// Copyable & Escapable requirements.
#define _conformsToDefaults(INDEX) \
_conformsTo(_typeparam(INDEX), _copyable), \
_conformsTo(_typeparam(INDEX), _escapable)
/// A synthesizer which generates a layout constraint requirement.
template <class TypeS>
struct LayoutConstraintSynthesizer {
TypeS Type;
LayoutConstraint Constraint;
};
template <class TypeS>
LayoutConstraintSynthesizer<TypeS>
_layout(TypeS type, LayoutConstraint constraint) {
return {type, constraint};
}
static LayoutConstraint _classLayout() {
return LayoutConstraint::getLayoutConstraint(LayoutConstraintKind::Class);
}
/// A synthesizer which generates a generic parameter list.
template <class... ParamS>
struct GenericParamListSynthesizer {
VariadicSynthesizerStorage<ParamS...> Params;
};
template <class... ParamS>
constexpr GenericParamListSynthesizer<ParamS...>
_generics(ParamS... params) {
return {{params...}};
}
struct CountGenericParameters {
unsigned &Count;
void operator()(UnrestrictedGenericParam _) const {
Count++;
}
template <class TypeS, class ProtoS>
void operator()(const ConformsToSynthesizer<TypeS, ProtoS> &_) const {
// not a parameter
}
template <class TypeS>
void operator()(const LayoutConstraintSynthesizer<TypeS> &_) const {
// not a parameter
}
};
} // end anonymous namespace
static const char * const GenericParamNames[] = {
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
};
static GenericTypeParamDecl*
createGenericParam(ASTContext &ctx, const char *name, unsigned index,
bool isParameterPack = false) {
ModuleDecl *M = ctx.TheBuiltinModule;
Identifier ident = ctx.getIdentifier(name);
auto paramKind = GenericTypeParamKind::Type;
if (isParameterPack) {
paramKind = GenericTypeParamKind::Pack;
}
return GenericTypeParamDecl::createImplicit(
&M->getMainFile(FileUnitKind::Builtin), ident, /*depth*/ 0, index,
paramKind);
}
/// Create a generic parameter list with multiple generic parameters.
static GenericParamList *getGenericParams(ASTContext &ctx,
unsigned numParameters,
bool areParameterPacks = false) {
assert(numParameters <= std::size(GenericParamNames));
SmallVector<GenericTypeParamDecl *, 2> genericParams;
for (unsigned i = 0; i != numParameters; ++i)
genericParams.push_back(createGenericParam(ctx, GenericParamNames[i], i,
areParameterPacks));
auto paramList = GenericParamList::create(ctx, SourceLoc(), genericParams,
SourceLoc());
return paramList;
}
template <class... ParamsS>
static GenericParamList *synthesizeGenericParamList(SynthesisContext &SC,
const GenericParamListSynthesizer<ParamsS...> ¶ms) {
unsigned count = 0;
params.Params.visit(CountGenericParameters{count});
auto paramList = getGenericParams(SC.Context, count);
SC.GenericParams = paramList;
return paramList;
}
namespace {
struct CollectGenericParams {
SynthesisContext &SC;
SmallVector<GenericTypeParamType *, 2> GenericParamTypes;
SmallVector<Requirement, 2> AddedRequirements;
CollectGenericParams(SynthesisContext &SC) : SC(SC) {
for (auto gp : SC.GenericParams->getParams()) {
GenericParamTypes.push_back(
gp->getDeclaredInterfaceType()->castTo<GenericTypeParamType>());
}
}
void operator()(UnrestrictedGenericParam _) {}
template <class TypeS, class ProtoS>
void operator()(const ConformsToSynthesizer<TypeS, ProtoS> &conf) {
auto type = synthesizeType(SC, conf.Type);
auto protocolType = synthesizeType(SC, conf.Protocol);
Requirement req = {RequirementKind::Conformance, type, protocolType};
AddedRequirements.push_back(req);
}
template <class TypeS>
void operator()(const LayoutConstraintSynthesizer<TypeS> &req) {
auto type = synthesizeType(SC, req.Type);
AddedRequirements.push_back({RequirementKind::Layout,
type, req.Constraint});
}
};
} // end anonymous namespace
template <class... ParamsS>
static GenericSignature
synthesizeGenericSignature(SynthesisContext &SC,
const GenericParamListSynthesizer<ParamsS...> &list) {
assert(SC.GenericParams && "synthesizeGenericParamList not called first");
CollectGenericParams collector(SC);
list.Params.visit(collector);
return buildGenericSignature(SC.Context,
GenericSignature(),
std::move(collector.GenericParamTypes),
std::move(collector.AddedRequirements),
/*allowInverses=*/false);
}
/// Build a builtin function declaration.
///
/// This is a "legacy" interface; you should probably use one of
/// the templated overloads below.
static FuncDecl *
getBuiltinFunction(Identifier Id, ArrayRef<Type> argTypes, Type ResType) {
auto &Context = ResType->getASTContext();
ModuleDecl *M = Context.TheBuiltinModule;
DeclContext *DC = &M->getMainFile(FileUnitKind::Builtin);
SmallVector<ParamDecl*, 4> params;
for (Type argType : argTypes) {
auto PD = new (Context) ParamDecl(SourceLoc(), SourceLoc(),
Identifier(), SourceLoc(), Identifier(), DC);
PD->setSpecifier(ParamSpecifier::Default);
PD->setInterfaceType(argType);
PD->setImplicit();
params.push_back(PD);
}
auto *paramList = ParameterList::create(Context, params);
DeclName Name(Context, Id, paramList);
auto *const FD = FuncDecl::createImplicit(
Context, StaticSpellingKind::None, Name, /*NameLoc=*/SourceLoc(),
/*Async=*/false, /*Throws=*/false, /*thrownType=*/Type(),
/*GenericParams=*/nullptr, paramList, ResType, DC);
FD->setAccess(AccessLevel::Public);
return FD;
}
template <class ExtInfoS, class ParamsS, class ResultS>
static FuncDecl *
getBuiltinFunctionImpl(SynthesisContext &SC, Identifier id,
GenericParamList *genericParams,
GenericSignature signature,
const ExtInfoS &extInfoS,
const ParamsS ¶msS,
const ResultS &resultS) {
auto params = synthesizeParameterList(SC, paramsS);
auto extInfo = synthesizeExtInfo(SC, extInfoS);
auto resultType = synthesizeType(SC, resultS);
DeclName name(SC.Context, id, params);
auto *FD = FuncDecl::createImplicit(
SC.Context, StaticSpellingKind::None, name, /*NameLoc=*/SourceLoc(),
extInfo.isAsync(), extInfo.isThrowing(), /*thrownType=*/Type(),
genericParams, params, resultType, SC.DC);
FD->setAccess(AccessLevel::Public);
FD->setGenericSignature(signature);
return FD;
}
/// Synthesize a non-generic builtin function declaration.
template <class ExtInfoS, class ParamsS, class ResultS>
static FuncDecl *
getBuiltinFunction(ASTContext &ctx, Identifier id,
const ExtInfoS &extInfoS, const ParamsS ¶msS,
const ResultS &resultS) {
ModuleDecl *M = ctx.TheBuiltinModule;
DeclContext *DC = &M->getMainFile(FileUnitKind::Builtin);
SynthesisContext SC(ctx, DC);
return getBuiltinFunctionImpl(SC, id, nullptr, GenericSignature(),
extInfoS, paramsS, resultS);
}
/// Synthesize a generic builtin function declaration.
template <class ExtInfoS, class GenericsS, class ParamsS, class ResultS>
static FuncDecl *
getBuiltinFunction(ASTContext &ctx, Identifier id,
const ExtInfoS &extInfoS,
const GenericsS &genericsS,
const ParamsS ¶msS,
const ResultS &resultS) {
ModuleDecl *M = ctx.TheBuiltinModule;
DeclContext *DC = &M->getMainFile(FileUnitKind::Builtin);
SynthesisContext SC(ctx, DC);
auto genericParamList = synthesizeGenericParamList(SC, genericsS);
auto genericSignature = synthesizeGenericSignature(SC, genericsS);
return getBuiltinFunctionImpl(SC, id, genericParamList, genericSignature,
extInfoS, paramsS, resultS);
}
namespace {
enum class BuiltinThrowsKind : uint8_t {
None,
Throws,
Rethrows
};
}
/// Build a builtin function declaration.
static FuncDecl *getBuiltinGenericFunction(
Identifier Id, ArrayRef<AnyFunctionType::Param> ArgParamTypes, Type ResType,
GenericParamList *GenericParams, GenericSignature Sig, bool Async,
BuiltinThrowsKind Throws, Type ThrownError, bool SendingResult) {
assert(GenericParams && "Missing generic parameters");
auto &Context = ResType->getASTContext();
ModuleDecl *M = Context.TheBuiltinModule;
DeclContext *DC = &M->getMainFile(FileUnitKind::Builtin);
SmallVector<ParamDecl*, 4> params;
for (unsigned i = 0, e = ArgParamTypes.size(); i < e; ++i) {
auto paramIfaceType = ArgParamTypes[i].getPlainType();
auto specifier =
ParamDecl::getParameterSpecifierForValueOwnership(
ArgParamTypes[i].getParameterFlags().getValueOwnership());
auto PD = new (Context) ParamDecl(SourceLoc(), SourceLoc(),
Identifier(), SourceLoc(),
Identifier(), DC);
PD->setSpecifier(specifier);
PD->setInterfaceType(paramIfaceType);
PD->setImplicit();
params.push_back(PD);
}
auto *paramList = ParameterList::create(Context, params);
DeclName Name(Context, Id, paramList);
auto *const func = FuncDecl::createImplicit(
Context, StaticSpellingKind::None, Name,
/*NameLoc=*/SourceLoc(),
Async,
Throws != BuiltinThrowsKind::None, ThrownError,
GenericParams, paramList, ResType, DC);
func->setSendingResult(SendingResult);
func->setAccess(AccessLevel::Public);
func->setGenericSignature(Sig);
if (Throws == BuiltinThrowsKind::Rethrows)
func->getAttrs().add(new (Context) RethrowsAttr(/*ThrowsLoc*/ SourceLoc()));
return func;
}
/// Build a getelementptr operation declaration.
static ValueDecl *getGepRawOperation(ASTContext &ctx,
Identifier id, Type argType) {
// This is always "(i8*, IntTy) -> i8*"
return getBuiltinFunction(ctx, id, _thin,
_parameters(_rawPointer, argType),
_rawPointer);
}
static ValueDecl *getStringObjectOrOperation(ASTContext &ctx,
Identifier id, Type argType) {
return getBuiltinFunction(ctx, id, _thin,
_parameters(argType, argType),
argType);
}
/// Build a binary operation declaration.
static ValueDecl *getBinaryOperation(ASTContext &ctx,
Identifier id, Type argType) {
return getBuiltinFunction(ctx, id, _thin,
_parameters(argType, argType),
argType);
}
/// Build a declaration for a binary operation with overflow.
static ValueDecl *getBinaryOperationWithOverflow(ASTContext &ctx,
Identifier id,
Type argType) {
return getBuiltinFunction(ctx, id, _thin,
_parameters(argType, argType, _int(1)),
_tuple(argType, _int(1)));
}
static ValueDecl *getUnaryOperation(ASTContext &ctx, Identifier id,
Type argType) {
return getBuiltinFunction(ctx, id, _thin, _parameters(argType), argType);
}
/// Build a binary predicate declaration.
static ValueDecl *getBinaryPredicate(ASTContext &ctx, Identifier id,
Type argType) {
if (auto vecType = argType->getAs<BuiltinVectorType>()) {
return getBuiltinFunction(ctx, id, _thin,
_parameters(argType, argType),
_vector(vecType->getNumElements(), _int(1)));
}
return getBuiltinFunction(ctx, id, _thin,
_parameters(argType, argType),
_int(1));
}
/// Build a cast. There is some custom type checking here.
static ValueDecl *getCastOperation(ASTContext &Context, Identifier Id,
BuiltinValueKind VK,
ArrayRef<Type> Types) {
if (Types.empty() || Types.size() > 2) return nullptr;
Type Input = Types[0];
Type Output = Types.size() == 2 ? Types[1] : Type();
// If both types are vectors, look through the vectors.
Type CheckInput = Input;
Type CheckOutput = Output;
bool UnwrappedVector = false;
auto InputVec = Input->getAs<BuiltinVectorType>();
auto OutputVec = Output.isNull()? nullptr :Output->getAs<BuiltinVectorType>();
if (InputVec && OutputVec &&
InputVec->getNumElements() == OutputVec->getNumElements()) {
UnwrappedVector = true;
CheckInput = InputVec->getElementType();
CheckOutput = OutputVec->getElementType();
}
// Custom type checking. We know the one or two types have been subjected to
// the "isBuiltinTypeOverloaded" predicate successfully.
switch (VK) {
default: llvm_unreachable("Not a cast operation");
case BuiltinValueKind::Trunc:
if (CheckOutput.isNull() ||
!CheckInput->is<BuiltinIntegerType>() ||
!CheckOutput->is<BuiltinIntegerType>() ||
CheckInput->castTo<BuiltinIntegerType>()->getLeastWidth() <=
CheckOutput->castTo<BuiltinIntegerType>()->getGreatestWidth())
return nullptr;
break;
case BuiltinValueKind::TruncOrBitCast:
if (CheckOutput.isNull() ||
!CheckInput->is<BuiltinIntegerType>() ||
!CheckOutput->is<BuiltinIntegerType>() ||
CheckInput->castTo<BuiltinIntegerType>()->getLeastWidth() <
CheckOutput->castTo<BuiltinIntegerType>()->getGreatestWidth())
return nullptr;
break;
case BuiltinValueKind::ZExt:
case BuiltinValueKind::SExt: {
if (CheckOutput.isNull() ||
!CheckInput->is<BuiltinIntegerType>() ||
!CheckOutput->is<BuiltinIntegerType>() ||
CheckInput->castTo<BuiltinIntegerType>()->getGreatestWidth() >=
CheckOutput->castTo<BuiltinIntegerType>()->getLeastWidth())
return nullptr;
break;
}
case BuiltinValueKind::ZExtOrBitCast:
case BuiltinValueKind::SExtOrBitCast: {
if (CheckOutput.isNull() ||
!CheckInput->is<BuiltinIntegerType>() ||
!CheckOutput->is<BuiltinIntegerType>() ||
CheckInput->castTo<BuiltinIntegerType>()->getGreatestWidth() >
CheckOutput->castTo<BuiltinIntegerType>()->getLeastWidth())
return nullptr;
break;
}
case BuiltinValueKind::FPToUI:
case BuiltinValueKind::FPToSI:
if (CheckOutput.isNull() || !CheckInput->is<BuiltinFloatType>() ||
!CheckOutput->is<BuiltinIntegerType>())
return nullptr;
break;
case BuiltinValueKind::UIToFP:
case BuiltinValueKind::SIToFP:
if (CheckOutput.isNull() || !CheckInput->is<BuiltinIntegerType>() ||
!CheckOutput->is<BuiltinFloatType>())
return nullptr;
break;
case BuiltinValueKind::FPTrunc:
if (CheckOutput.isNull() ||
!CheckInput->is<BuiltinFloatType>() ||
!CheckOutput->is<BuiltinFloatType>() ||
CheckInput->castTo<BuiltinFloatType>()->getFPKind() <=
CheckOutput->castTo<BuiltinFloatType>()->getFPKind())
return nullptr;
break;
case BuiltinValueKind::FPExt:
if (CheckOutput.isNull() ||
!CheckInput->is<BuiltinFloatType>() ||
!CheckOutput->is<BuiltinFloatType>() ||
CheckInput->castTo<BuiltinFloatType>()->getFPKind() >=
CheckOutput->castTo<BuiltinFloatType>()->getFPKind())
return nullptr;
break;
case BuiltinValueKind::PtrToInt:
// FIXME: Do we care about vectors of pointers?
if (!CheckOutput.isNull() || !CheckInput->is<BuiltinIntegerType>() ||
UnwrappedVector)
return nullptr;
Output = Input;
Input = Context.TheRawPointerType;
break;
case BuiltinValueKind::IntToPtr:
// FIXME: Do we care about vectors of pointers?
if (!CheckOutput.isNull() || !CheckInput->is<BuiltinIntegerType>() ||
UnwrappedVector)
return nullptr;
Output = Context.TheRawPointerType;
break;
case BuiltinValueKind::BitCast:
if (CheckOutput.isNull()) return nullptr;
// Support float <-> int bitcast where the types are the same widths.
if (auto *BIT = CheckInput->getAs<BuiltinIntegerType>())
if (auto *BFT = CheckOutput->getAs<BuiltinFloatType>())
if (BIT->isFixedWidth() && BIT->getFixedWidth() == BFT->getBitWidth())
break;
if (auto *BFT = CheckInput->getAs<BuiltinFloatType>())
if (auto *BIT = CheckOutput->getAs<BuiltinIntegerType>())
if (BIT->isFixedWidth() && BIT->getFixedWidth() == BFT->getBitWidth())
break;
// Support VecNxInt1 -> IntN bitcast for SIMD comparison results.
if (auto *Vec = CheckInput->getAs<BuiltinVectorType>())
if (auto *BIT = CheckOutput->getAs<BuiltinIntegerType>())
if (auto *Element = Vec->getElementType()->getAs<BuiltinIntegerType>())
if (Element->getFixedWidth() == 1 &&
BIT->isFixedWidth() &&
BIT->getFixedWidth() == Vec->getNumElements())
break;
// And IntN -> VecNxInt1 for SIMDMask random generators.
if (auto *Vec = CheckOutput->getAs<BuiltinVectorType>())
if (auto *BIT = CheckInput->getAs<BuiltinIntegerType>())
if (auto *Element = Vec->getElementType()->getAs<BuiltinIntegerType>())
if (Element->getFixedWidth() == 1 &&
BIT->isFixedWidth() &&
BIT->getFixedWidth() == Vec->getNumElements())
break;
// FIXME: Implement bitcast typechecking.
llvm_unreachable("Bitcast not supported yet!");
return nullptr;
}
return getBuiltinFunction(Context, Id, _thin,
_parameters(Input),
Output);
}
namespace {
class BuiltinFunctionBuilder {
public:
ASTContext &Context;
private:
GenericParamList *TheGenericParamList;
SmallVector<AnyFunctionType::Param, 4> InterfaceParams;
Type InterfaceResult;
bool Async = false;
BuiltinThrowsKind Throws = BuiltinThrowsKind::None;
Type ThrownError;
bool SendingResult = false;
// Accumulate params and requirements here, so that we can call
// `buildGenericSignature()` when `build()` is called.
SmallVector<GenericTypeParamType *, 2> genericParamTypes;
SmallVector<Requirement, 2> addedRequirements;
public:
BuiltinFunctionBuilder(ASTContext &ctx, unsigned numGenericParams = 1,
bool wantsAdditionalAnyObjectRequirement = false,
bool areParametersPacks = false)
: Context(ctx) {
TheGenericParamList = getGenericParams(ctx, numGenericParams,
areParametersPacks);
if (wantsAdditionalAnyObjectRequirement) {
Requirement req(RequirementKind::Conformance,
TheGenericParamList->getParams()[0]->getInterfaceType(),
ctx.getAnyObjectConstraint());
addedRequirements.push_back(req);
}
for (auto gp : TheGenericParamList->getParams()) {
genericParamTypes.push_back(
gp->getDeclaredInterfaceType()->castTo<GenericTypeParamType>());
}
}
template <class G>
void addParameter(const G &generator,
ParamSpecifier ownership = ParamSpecifier::Default,
bool isSending = false) {
Type gTyIface = generator.build(*this);
auto flags = ParameterTypeFlags().withOwnershipSpecifier(ownership);
auto p = AnyFunctionType::Param(gTyIface, Identifier(), flags);
if (isSending) {
p = p.withFlags(p.getParameterFlags().withSending(true));
}
InterfaceParams.push_back(p);
}
template <class G>
void setResult(const G &generator) {
InterfaceResult = generator.build(*this);
}
template <class G>
void setThrownError(const G &generator) {
ThrownError = generator.build(*this);
}
template <class G>
void addConformanceRequirement(const G &generator, KnownProtocolKind kp) {
addConformanceRequirement(generator, Context.getProtocol(kp));
}
template <class G>
void addConformanceRequirement(const G &generator, ProtocolDecl *proto) {
assert(proto && "missing protocol");
Requirement req(RequirementKind::Conformance,
generator.build(*this),
proto->getDeclaredInterfaceType());
addedRequirements.push_back(req);
}
void setAsync() {
Async = true;
}
void setThrows() {
Throws = BuiltinThrowsKind::Throws;
}
void setRethrows() {
Throws = BuiltinThrowsKind::Rethrows;
}
void setSendingResult() { SendingResult = true; }
FuncDecl *build(Identifier name) {
auto GenericSig = buildGenericSignature(
Context, GenericSignature(),
std::move(genericParamTypes),
std::move(addedRequirements),
/*allowInverses=*/false);
return getBuiltinGenericFunction(name, InterfaceParams, InterfaceResult,
TheGenericParamList, GenericSig, Async,
Throws, ThrownError, SendingResult);
}
// Don't use these generator classes directly; call the make{...}
// functions which follow this class.
struct ConcreteGenerator {
Type TheType;
Type build(BuiltinFunctionBuilder &builder) const {
return TheType;
}
};
struct ParameterGenerator {
unsigned Index;
Type build(BuiltinFunctionBuilder &builder) const {
return builder.TheGenericParamList->getParams()[Index]
->getDeclaredInterfaceType();
}
};
struct LambdaGenerator {
std::function<Type(BuiltinFunctionBuilder &)> TheFunction;
Type build(BuiltinFunctionBuilder &builder) const {
return TheFunction(builder);
}
};
template <class T>
struct MetatypeGenerator {
T Object;
std::optional<MetatypeRepresentation> Repr;
Type build(BuiltinFunctionBuilder &builder) const {
return MetatypeType::get(Object.build(builder), Repr);
}
};
template <class T>
struct PackExpansionGenerator {
T Object;
Type build(BuiltinFunctionBuilder &builder) const {
auto patternTy = Object.build(builder);
SmallVector<Type, 2> packs;
patternTy->getTypeParameterPacks(packs);
return PackExpansionType::get(patternTy, packs[0]);
}
};
};
} // end anonymous namespace
static BuiltinFunctionBuilder::ConcreteGenerator
makeConcrete(Type type) {
return { type };
}
static BuiltinFunctionBuilder::ParameterGenerator
makeGenericParam(unsigned index = 0) {
return { index };
}
template <class... Gs>
static BuiltinFunctionBuilder::LambdaGenerator
makeTuple(const Gs & ...elementGenerators) {
return {
[=](BuiltinFunctionBuilder &builder) -> Type {
TupleTypeElt elts[] = {
elementGenerators.build(builder)...
};
return TupleType::get(elts, builder.Context);
}
};
}
template <class... Gs>
static BuiltinFunctionBuilder::LambdaGenerator
makeBoundGenericType(NominalTypeDecl *decl,
const Gs & ...argumentGenerators) {
return {
[=](BuiltinFunctionBuilder &builder) -> Type {
Type args[] = {
argumentGenerators.build(builder)...
};
return BoundGenericType::get(decl, Type(), args);
}
};
}
template <class T>
static BuiltinFunctionBuilder::MetatypeGenerator<T>
makeMetatype(const T &object,
std::optional<MetatypeRepresentation> repr = std::nullopt) {
return { object, repr };
}
template <class T>
static BuiltinFunctionBuilder::PackExpansionGenerator<T>
makePackExpansion(const T &object) {
return { object };
}
/// Create a function with type <T> T -> ().
static ValueDecl *getRefCountingOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted,
_conformsTo(_typeparam(0), _copyable)),
_parameters(_typeparam(0)),
_void);
}
static ValueDecl *getLoadOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted,
_conformsTo(_typeparam(0), _copyable),
_conformsTo(_typeparam(0), _escapable)),
_parameters(_rawPointer),
_typeparam(0));
}
static ValueDecl *getTakeOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted,
_conformsTo(_typeparam(0), _escapable)),
_parameters(_rawPointer),
_typeparam(0));
}
static ValueDecl *getStoreOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_owned(_typeparam(0)),
_rawPointer),
_void);
}
static ValueDecl *getDestroyOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_metatype(_typeparam(0)),
_rawPointer),
_void);
}
static ValueDecl *getDestroyArrayOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_metatype(_typeparam(0)),
_rawPointer,
_word),
_void);
}
static ValueDecl *getAssumeAlignment(ASTContext &ctx, Identifier id) {
// This is always "(Builtin.RawPointer, Builtin.Word) -> Builtin.RawPointer"
return getBuiltinFunction(ctx, id, _thin, _parameters(_rawPointer, _word),
_rawPointer);
}
static ValueDecl *getCopyArrayOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted,
_conformsTo(_typeparam(0), _copyable)),
_parameters(_metatype(_typeparam(0)),
_rawPointer,
_rawPointer,
_word),
_void);
}
static ValueDecl *getTransferArrayOperation(ASTContext &ctx, Identifier id) {
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_metatype(_typeparam(0)),
_rawPointer,
_rawPointer,
_word),
_void);
}
static ValueDecl *getIsUniqueOperation(ASTContext &ctx, Identifier id) {
// <T> (@inout T) -> Int1
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_inout(_typeparam(0))),
_int(1));
}
static ValueDecl *getEndCOWMutation(ASTContext &ctx, Identifier id) {
// <T> (@inout T) -> ()
return getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_inout(_typeparam(0))),
_void);
}
static ValueDecl *getBindMemoryOperation(ASTContext &ctx, Identifier id) {
FuncDecl *fd = getBuiltinFunction(ctx, id, _thin,
_generics(_unrestricted),
_parameters(_rawPointer,
_word,
_metatype(_typeparam(0))),
_word);
fd->getAttrs().add(new (ctx) DiscardableResultAttr(/*implicit*/true));
return fd;
}
static ValueDecl *getRebindMemoryOperation(ASTContext &ctx, Identifier id) {
FuncDecl *fd = getBuiltinFunction(ctx, id, _thin,
_parameters(_rawPointer,
_word),
_word);
fd->getAttrs().add(new (ctx) DiscardableResultAttr(/*implicit*/true));
return fd;
}
static ValueDecl *getAllocWithTailElemsOperation(ASTContext &Context,
Identifier Id,
int NumTailTypes) {
if (NumTailTypes < 1 ||
1 + NumTailTypes > (int)std::size(GenericParamNames))
return nullptr;