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swift-mirror/lib/IRGen/IRGenModule.h
John McCall a7c5c80799 Compute class metadata bounds solely from class-descriptor chain information. 
Change the "metadata base offset" variable into a "class metadata bounds"
variable that contains the base offset and the +/- bounds on the class.
Link this variable from the class descriptor when the class has a resilient
superclass; otherwise, store the +/- bounds there.  Use this variable to
compute the immediate-members offset for various runtime queries.  Teach the
runtime to fill it in lazily and remove the code to compute it from the
generated code for instantiation.  Identify generic arguments with the start
of the immediate class metadata members / end of the {struct,enum} metadata
header and remove the generic-arguments offset from generic type descriptors.
2018-03-04 02:14:32 -05:00

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//===--- IRGenModule.h - Swift Global IR Generation Module ------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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 defines the interface used
// the AST into LLVM IR.
//
//===----------------------------------------------------------------------===//
#ifndef SWIFT_IRGEN_IRGENMODULE_H
#define SWIFT_IRGEN_IRGENMODULE_H
#include "IRGen.h"
#include "SwiftTargetInfo.h"
#include "swift/AST/Decl.h"
#include "swift/AST/Module.h"
#include "swift/Basic/ClusteredBitVector.h"
#include "swift/Basic/LLVM.h"
#include "swift/Basic/OptimizationMode.h"
#include "swift/Basic/SuccessorMap.h"
#include "swift/IRGen/ValueWitness.h"
#include "swift/SIL/SILFunction.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/ValueHandle.h"
#include "llvm/Target/TargetMachine.h"
#include <atomic>
namespace llvm {
class Constant;
class DataLayout;
class Function;
class FunctionType;
class GlobalVariable;
class InlineAsm;
class IntegerType;
class LLVMContext;
class MDNode;
class Metadata;
class Module;
class PointerType;
class StructType;
class StringRef;
class Type;
class AttributeList;
}
namespace clang {
class ASTContext;
template <class> class CanQual;
class CodeGenerator;
class Decl;
class GlobalDecl;
class Type;
namespace CodeGen {
class CGFunctionInfo;
class CodeGenModule;
}
}
namespace swift {
class GenericSignature;
class GenericSignatureBuilder;
class AssociatedConformance;
class AssociatedType;
class ASTContext;
class BraceStmt;
class CanType;
class LinkLibrary;
class SILFunction;
class IRGenOptions;
class NormalProtocolConformance;
class ProtocolConformance;
class ProtocolCompositionType;
struct SILDeclRef;
class SILGlobalVariable;
class SILModule;
class SILType;
class SILWitnessTable;
class SourceLoc;
class SourceFile;
class Type;
enum class TypeMetadataRecordKind : unsigned;
namespace Lowering {
class TypeConverter;
}
namespace irgen {
class Address;
class ClangTypeConverter;
class ClassMetadataLayout;
class DebugTypeInfo;
class EnumImplStrategy;
class EnumMetadataLayout;
class ExplosionSchema;
class FixedTypeInfo;
class ForeignClassMetadataLayout;
class ForeignFunctionInfo;
class FormalType;
class HeapLayout;
class StructLayout;
class IRGenDebugInfo;
class IRGenFunction;
class LinkEntity;
class LoadableTypeInfo;
class MetadataLayout;
class NecessaryBindings;
class NominalMetadataLayout;
class ProtocolInfo;
class Signature;
class StructMetadataLayout;
struct SymbolicMangling;
class TypeConverter;
class TypeInfo;
enum class ValueWitness : unsigned;
enum class ReferenceCounting : unsigned char;
class IRGenModule;
/// A type descriptor for a field type accessor.
class FieldTypeInfo {
llvm::PointerIntPair<CanType, 2, unsigned> Info;
/// Bits in the "int" part of the Info pair.
enum : unsigned {
/// Flag indicates that the case is indirectly stored in a box.
Indirect = 1,
/// Indicates a weak optional reference
Weak = 2,
};
static unsigned getFlags(bool indirect, bool weak) {
return (indirect ? Indirect : 0)
| (weak ? Weak : 0);
// | (blah ? Blah : 0) ...
}
public:
FieldTypeInfo(CanType type, bool indirect, bool weak)
: Info(type, getFlags(indirect, weak))
{}
CanType getType() const { return Info.getPointer(); }
bool isIndirect() const { return Info.getInt() & Indirect; }
bool isWeak() const { return Info.getInt() & Weak; }
bool hasFlags() const { return Info.getInt() != 0; }
};
enum RequireMetadata_t : bool {
DontRequireMetadata = false,
RequireMetadata = true
};
/// The principal singleton which manages all of IR generation.
///
/// The IRGenerator delegates the emission of different top-level entities
/// to different instances of IRGenModule, each of which creates a different
/// llvm::Module.
///
/// In single-threaded compilation, the IRGenerator creates only a single
/// IRGenModule. In multi-threaded compilation, it contains multiple
/// IRGenModules - one for each LLVM module (= one for each input/output file).
class IRGenerator {
public:
IRGenOptions &Opts;
SILModule &SIL;
private:
llvm::DenseMap<SourceFile *, IRGenModule *> GenModules;
// Stores the IGM from which a function is referenced the first time.
// It is used if a function has no source-file association.
llvm::DenseMap<SILFunction *, IRGenModule *> DefaultIGMForFunction;
// The IGM of the first source file.
IRGenModule *PrimaryIGM = nullptr;
// The current IGM for which IR is generated.
IRGenModule *CurrentIGM = nullptr;
struct LazyTypeGlobalsInfo {
/// Is there a use of the type metadata?
bool IsMetadataUsed = false;
/// Is there a use of the nominal type descriptor?
bool IsDescriptorUsed = false;
/// Have we already emitted a definition for the type metadata with
/// the current requirements?
bool IsMetadataEmitted = false;
/// Have we already emitted a definition for the type descriptor with
/// the current requirements?
bool IsDescriptorEmitted = false;
/// Is the type a lazy type?
bool IsLazy = false;
};
/// The set of type metadata that have been enqueued for lazy emission.
///
/// It can also contain some eagerly emitted metadata. Those are ignored in
/// lazy emission.
llvm::DenseMap<NominalTypeDecl*, LazyTypeGlobalsInfo> LazyTypeGlobals;
/// The queue of lazy type metadata to emit.
llvm::SmallVector<NominalTypeDecl*, 4> LazyTypeMetadata;
/// The queue of lazy type context descriptors to emit.
llvm::SmallVector<NominalTypeDecl*, 4> LazyTypeContextDescriptors;
llvm::SmallPtrSet<SILFunction*, 4> LazilyEmittedFunctions;
struct FieldTypeMetadata {
IRGenModule *IGM;
std::vector<CanType> fieldTypes;
};
/// Field types we need to verify are present.
llvm::SmallVector<FieldTypeMetadata, 4> LazyFieldTypes;
/// SIL functions that we need to emit lazily.
llvm::SmallVector<SILFunction*, 4> LazyFunctionDefinitions;
/// The set of witness tables that have been enqueue for lazy emission.
llvm::SmallPtrSet<SILWitnessTable *, 4> LazilyEmittedWitnessTables;
/// The queue of lazy witness tables to emit.
llvm::SmallVector<SILWitnessTable *, 4> LazyWitnessTables;
llvm::SmallVector<ClassDecl *, 4> ClassesForEagerInitialization;
/// The order in which all the SIL function definitions should
/// appear in the translation unit.
llvm::DenseMap<SILFunction*, unsigned> FunctionOrder;
/// The queue of IRGenModules for multi-threaded compilation.
SmallVector<IRGenModule *, 8> Queue;
std::atomic<int> QueueIndex;
friend class CurrentIGMPtr;
public:
explicit IRGenerator(IRGenOptions &opts, SILModule &module);
/// Attempt to create an llvm::TargetMachine for the current target.
std::unique_ptr<llvm::TargetMachine> createTargetMachine();
/// Add an IRGenModule for a source file.
/// Should only be called from IRGenModule's constructor.
void addGenModule(SourceFile *SF, IRGenModule *IGM);
/// Get an IRGenModule for a source file.
IRGenModule *getGenModule(SourceFile *SF) {
IRGenModule *IGM = GenModules[SF];
assert(IGM);
return IGM;
}
/// Get an IRGenModule for a declaration context.
/// Returns the IRGenModule of the containing source file, or if this cannot
/// be determined, returns the primary IRGenModule.
IRGenModule *getGenModule(DeclContext *ctxt);
/// Get an IRGenModule for a function.
/// Returns the IRGenModule of the containing source file, or if this cannot
/// be determined, returns the IGM from which the function is referenced the
/// first time.
IRGenModule *getGenModule(SILFunction *f);
/// Returns the primary IRGenModule. This is the first added IRGenModule.
/// It is used for everything which cannot be correlated to a specific source
/// file. And of course, in single-threaded compilation there is only the
/// primary IRGenModule.
IRGenModule *getPrimaryIGM() const {
assert(PrimaryIGM);
return PrimaryIGM;
}
bool hasMultipleIGMs() const { return GenModules.size() >= 2; }
llvm::DenseMap<SourceFile *, IRGenModule *>::iterator begin() {
return GenModules.begin();
}
llvm::DenseMap<SourceFile *, IRGenModule *>::iterator end() {
return GenModules.end();
}
/// Emit functions, variables and tables which are needed anyway, e.g. because
/// they are externally visible.
void emitGlobalTopLevel();
/// Emit references to each of the protocol descriptors defined in this
/// IR module.
void emitSwiftProtocols();
/// Emit the protocol conformance records needed by each IR module.
void emitProtocolConformances();
/// Emit type metadata records for types without explicit protocol conformance.
void emitTypeMetadataRecords();
/// Emit reflection metadata records for builtin and imported types referenced
/// from this module.
void emitBuiltinReflectionMetadata();
/// Emit a symbol identifying the reflection metadata version.
void emitReflectionMetadataVersion();
void emitEagerClassInitialization();
/// Checks if the metadata of \p Nominal can be emitted lazily.
///
/// If yes, \p Nominal is added to eligibleLazyMetadata and true is returned.
bool tryEnableLazyTypeMetadata(NominalTypeDecl *Nominal);
/// Emit everything which is reachable from already emitted IR.
void emitLazyDefinitions();
void addLazyFunction(SILFunction *f) {
// Add it to the queue if it hasn't already been put there.
if (LazilyEmittedFunctions.insert(f).second) {
LazyFunctionDefinitions.push_back(f);
DefaultIGMForFunction[f] = CurrentIGM;
}
}
void noteUseOfTypeMetadata(NominalTypeDecl *type) {
noteUseOfTypeGlobals(type, true, RequireMetadata);
}
void noteUseOfTypeContextDescriptor(NominalTypeDecl *type,
RequireMetadata_t requireMetadata) {
noteUseOfTypeGlobals(type, false, requireMetadata);
}
private:
void noteUseOfTypeGlobals(NominalTypeDecl *type,
bool isUseOfMetadata,
RequireMetadata_t requireMetadata);
public:
/// Return true if \p wt can be emitted lazily.
bool canEmitWitnessTableLazily(SILWitnessTable *wt);
/// Adds \p Conf to LazyWitnessTables if it has not been added yet.
void addLazyWitnessTable(const ProtocolConformance *Conf);
void addFieldTypes(ArrayRef<CanType> fieldTypes, IRGenModule *IGM) {
LazyFieldTypes.push_back({IGM, {fieldTypes.begin(), fieldTypes.end()}});
}
void addClassForEagerInitialization(ClassDecl *ClassDecl);
unsigned getFunctionOrder(SILFunction *F) {
auto it = FunctionOrder.find(F);
assert(it != FunctionOrder.end() &&
"no order number for SIL function definition?");
return it->second;
}
/// In multi-threaded compilation fetch the next IRGenModule from the queue.
IRGenModule *fetchFromQueue() {
int idx = QueueIndex++;
if (idx < (int)Queue.size()) {
return Queue[idx];
}
return nullptr;
}
/// Return the effective triple used by clang.
llvm::Triple getEffectiveClangTriple();
};
class ConstantReference {
public:
enum Directness : bool { Direct, Indirect };
private:
llvm::PointerIntPair<llvm::Constant *, 1, Directness> ValueAndIsIndirect;
public:
ConstantReference() {}
ConstantReference(llvm::Constant *value, Directness isIndirect)
: ValueAndIsIndirect(value, isIndirect) {}
Directness isIndirect() const { return ValueAndIsIndirect.getInt(); }
llvm::Constant *getValue() const { return ValueAndIsIndirect.getPointer(); }
llvm::Constant *getDirectValue() const {
assert(!isIndirect());
return getValue();
}
explicit operator bool() const {
return ValueAndIsIndirect.getPointer() != nullptr;
}
};
/// A reference to a declared type entity.
class TypeEntityReference {
TypeMetadataRecordKind Kind;
llvm::Constant *Value;
public:
TypeEntityReference(TypeMetadataRecordKind kind, llvm::Constant *value)
: Kind(kind), Value(value) {}
TypeMetadataRecordKind getKind() const { return Kind; }
llvm::Constant *getValue() const { return Value; }
};
/// IRGenModule - Primary class for emitting IR for global declarations.
///
class IRGenModule {
public:
// The ABI version of the Swift data generated by this file.
static const uint32_t swiftVersion = 6;
IRGenerator &IRGen;
ASTContext &Context;
std::unique_ptr<clang::CodeGenerator> ClangCodeGen;
llvm::Module &Module;
llvm::LLVMContext &LLVMContext;
const llvm::DataLayout DataLayout;
const llvm::Triple Triple;
std::unique_ptr<llvm::TargetMachine> TargetMachine;
ModuleDecl *getSwiftModule() const;
Lowering::TypeConverter &getSILTypes() const;
SILModule &getSILModule() const { return IRGen.SIL; }
const IRGenOptions &getOptions() const { return IRGen.Opts; }
SILModuleConventions silConv;
ModuleDecl *ObjCModule = nullptr;
ModuleDecl *ClangImporterModule = nullptr;
SourceFile *CurSourceFile = nullptr;
llvm::SmallString<128> OutputFilename;
llvm::SmallString<128> MainInputFilenameForDebugInfo;
/// Order dependency -- TargetInfo must be initialized after Opts.
const SwiftTargetInfo TargetInfo;
/// Holds lexical scope info, etc. Is a nullptr if we compile without -g.
IRGenDebugInfo *DebugInfo;
/// A global variable which stores the hash of the module. Used for
/// incremental compilation.
llvm::GlobalVariable *ModuleHash;
/// Does the current target require Objective-C interoperation?
bool ObjCInterop = true;
/// Is the current target using the Darwin pre-stable ABI's class marker bit?
bool UseDarwinPreStableABIBit = true;
/// Should we add value names to local IR values?
bool EnableValueNames = false;
// Is swifterror returned in a register by the target ABI.
bool IsSwiftErrorInRegister;
llvm::Type *VoidTy; /// void (usually {})
llvm::IntegerType *Int1Ty; /// i1
llvm::IntegerType *Int8Ty; /// i8
llvm::IntegerType *Int16Ty; /// i16
union {
llvm::IntegerType *Int32Ty; /// i32
llvm::IntegerType *RelativeAddressTy;
};
union {
llvm::PointerType *Int32PtrTy; /// i32 *
llvm::PointerType *RelativeAddressPtrTy;
};
llvm::IntegerType *Int64Ty; /// i64
union {
llvm::IntegerType *SizeTy; /// usually i32 or i64
llvm::IntegerType *IntPtrTy;
llvm::IntegerType *MetadataKindTy;
llvm::IntegerType *OnceTy;
llvm::IntegerType *FarRelativeAddressTy;
};
llvm::IntegerType *ObjCBoolTy; /// i8 or i1
union {
llvm::PointerType *Int8PtrTy; /// i8*
llvm::PointerType *WitnessTableTy;
llvm::PointerType *ObjCSELTy;
llvm::PointerType *FunctionPtrTy;
llvm::PointerType *CaptureDescriptorPtrTy;
};
union {
llvm::PointerType *Int8PtrPtrTy; /// i8**
llvm::PointerType *WitnessTablePtrTy;
};
llvm::StructType *RefCountedStructTy;/// %swift.refcounted = type { ... }
Size RefCountedStructSize; /// sizeof(%swift.refcounted)
llvm::PointerType *RefCountedPtrTy; /// %swift.refcounted*
llvm::PointerType *WeakReferencePtrTy;/// %swift.weak_reference*
llvm::PointerType *UnownedReferencePtrTy;/// %swift.unowned_reference*
llvm::Constant *RefCountedNull; /// %swift.refcounted* null
llvm::StructType *FunctionPairTy; /// { i8*, %swift.refcounted* }
llvm::StructType *NoEscapeFunctionPairTy; /// { i8*, %swift.opaque* }
llvm::FunctionType *DeallocatingDtorTy; /// void (%swift.refcounted*)
llvm::StructType *TypeMetadataStructTy; /// %swift.type = type { ... }
llvm::PointerType *TypeMetadataPtrTy;/// %swift.type*
llvm::PointerType *TupleTypeMetadataPtrTy; /// %swift.tuple_type*
llvm::StructType *FullHeapMetadataStructTy; /// %swift.full_heapmetadata = type { ... }
llvm::PointerType *FullHeapMetadataPtrTy;/// %swift.full_heapmetadata*
llvm::StructType *FullBoxMetadataStructTy; /// %swift.full_boxmetadata = type { ... }
llvm::PointerType *FullBoxMetadataPtrTy;/// %swift.full_boxmetadata*
llvm::StructType *FullTypeMetadataStructTy; /// %swift.full_type = type { ... }
llvm::PointerType *FullTypeMetadataPtrTy;/// %swift.full_type*
llvm::StructType *ProtocolDescriptorStructTy; /// %swift.protocol = type { ... }
llvm::PointerType *ProtocolDescriptorPtrTy; /// %swift.protocol*
llvm::StructType *ProtocolRequirementStructTy; /// %swift.protocol_requirement
union {
llvm::PointerType *ObjCPtrTy; /// %objc_object*
llvm::PointerType *UnknownRefCountedPtrTy;
};
llvm::PointerType *BridgeObjectPtrTy; /// %swift.bridge*
llvm::StructType *OpaqueTy; /// %swift.opaque
llvm::PointerType *OpaquePtrTy; /// %swift.opaque*
llvm::StructType *ObjCClassStructTy; /// %objc_class
llvm::PointerType *ObjCClassPtrTy; /// %objc_class*
llvm::StructType *ObjCSuperStructTy; /// %objc_super
llvm::PointerType *ObjCSuperPtrTy; /// %objc_super*
llvm::StructType *ObjCBlockStructTy; /// %objc_block
llvm::PointerType *ObjCBlockPtrTy; /// %objc_block*
llvm::StructType *ProtocolRecordTy;
llvm::PointerType *ProtocolRecordPtrTy;
llvm::StructType *ProtocolConformanceDescriptorTy;
llvm::PointerType *ProtocolConformanceDescriptorPtrTy;
llvm::StructType *TypeContextDescriptorTy;
llvm::PointerType *TypeContextDescriptorPtrTy;
llvm::StructType *ClassContextDescriptorTy;
llvm::StructType *MethodDescriptorStructTy; /// %swift.method_descriptor
llvm::StructType *TypeMetadataRecordTy;
llvm::PointerType *TypeMetadataRecordPtrTy;
llvm::StructType *FieldDescriptorTy;
llvm::PointerType *FieldDescriptorPtrTy;
llvm::PointerType *FieldDescriptorPtrPtrTy;
llvm::PointerType *ErrorPtrTy; /// %swift.error*
llvm::StructType *OpenedErrorTripleTy; /// { %swift.opaque*, %swift.type*, i8** }
llvm::PointerType *OpenedErrorTriplePtrTy; /// { %swift.opaque*, %swift.type*, i8** }*
llvm::PointerType *WitnessTablePtrPtrTy; /// i8***
llvm::StructType *WitnessTableSliceTy; /// { witness_table**, i64 }
/// Used to create unique names for class layout types with tail allocated
/// elements.
unsigned TailElemTypeID = 0;
unsigned InvariantMetadataID; /// !invariant.load
unsigned DereferenceableID; /// !dereferenceable
llvm::MDNode *InvariantNode;
llvm::CallingConv::ID C_CC; /// standard C calling convention
llvm::CallingConv::ID DefaultCC; /// default calling convention
llvm::CallingConv::ID SwiftCC; /// swift calling convention
Signature getAssociatedTypeMetadataAccessFunctionSignature();
Signature getAssociatedTypeWitnessTableAccessFunctionSignature();
llvm::StructType *getGenericWitnessTableCacheTy();
/// Get the bit width of an integer type for the target platform.
unsigned getBuiltinIntegerWidth(BuiltinIntegerType *t);
unsigned getBuiltinIntegerWidth(BuiltinIntegerWidth w);
Size getPointerSize() const { return PtrSize; }
Alignment getPointerAlignment() const {
// We always use the pointer's width as its swift ABI alignment.
return Alignment(PtrSize.getValue());
}
Alignment getWitnessTableAlignment() const {
return getPointerAlignment();
}
Alignment getTypeMetadataAlignment() const {
return getPointerAlignment();
}
Size::int_type getOffsetInWords(Size offset) {
assert(offset.isMultipleOf(getPointerSize()));
return offset / getPointerSize();
}
llvm::Type *getReferenceType(ReferenceCounting style);
static bool isUnownedReferenceAddressOnly(ReferenceCounting style) {
switch (style) {
case ReferenceCounting::Native:
return false;
case ReferenceCounting::Unknown:
case ReferenceCounting::ObjC:
case ReferenceCounting::Block:
return true;
case ReferenceCounting::Bridge:
case ReferenceCounting::Error:
llvm_unreachable("unowned references to this type are not supported");
}
llvm_unreachable("Not a valid ReferenceCounting.");
}
/// Return the spare bit mask to use for types that comprise heap object
/// pointers.
const SpareBitVector &getHeapObjectSpareBits() const;
const SpareBitVector &getFunctionPointerSpareBits() const;
const SpareBitVector &getWitnessTablePtrSpareBits() const;
SpareBitVector getWeakReferenceSpareBits() const;
Size getWeakReferenceSize() const { return PtrSize; }
Alignment getWeakReferenceAlignment() const { return getPointerAlignment(); }
SpareBitVector getUnownedReferenceSpareBits(ReferenceCounting style) const;
unsigned getUnownedExtraInhabitantCount(ReferenceCounting style);
APInt getUnownedExtraInhabitantValue(unsigned bits, unsigned index,
ReferenceCounting style);
APInt getUnownedExtraInhabitantMask(ReferenceCounting style);
llvm::Type *getFixedBufferTy();
llvm::Type *getValueWitnessTy(ValueWitness index);
Signature getValueWitnessSignature(ValueWitness index);
void unimplemented(SourceLoc, StringRef Message);
LLVM_ATTRIBUTE_NORETURN
void fatal_unimplemented(SourceLoc, StringRef Message);
void error(SourceLoc loc, const Twine &message);
bool useDllStorage();
Size getAtomicBoolSize() const { return AtomicBoolSize; }
Alignment getAtomicBoolAlignment() const { return AtomicBoolAlign; }
enum class ObjCLabelType {
ClassName,
MethodVarName,
MethodVarType,
PropertyName,
};
std::string GetObjCSectionName(StringRef Section, StringRef MachOAttributes);
void SetCStringLiteralSection(llvm::GlobalVariable *GV, ObjCLabelType Type);
private:
Size PtrSize;
Size AtomicBoolSize;
Alignment AtomicBoolAlign;
llvm::Type *FixedBufferTy; /// [N x i8], where N == 3 * sizeof(void*)
llvm::Type *ValueWitnessTys[MaxNumValueWitnesses];
llvm::FunctionType *AssociatedTypeMetadataAccessFunctionTy = nullptr;
llvm::FunctionType *AssociatedTypeWitnessTableAccessFunctionTy = nullptr;
llvm::StructType *GenericWitnessTableCacheTy = nullptr;
llvm::DenseMap<llvm::Type *, SpareBitVector> SpareBitsForTypes;
//--- Types -----------------------------------------------------------------
public:
const ProtocolInfo &getProtocolInfo(ProtocolDecl *D);
SILType getLoweredType(AbstractionPattern orig, Type subst);
SILType getLoweredType(Type subst);
const TypeInfo &getTypeInfoForUnlowered(AbstractionPattern orig,
CanType subst);
const TypeInfo &getTypeInfoForUnlowered(AbstractionPattern orig,
Type subst);
const TypeInfo &getTypeInfoForUnlowered(Type subst);
const TypeInfo &getTypeInfoForLowered(CanType T);
const TypeInfo &getTypeInfo(SILType T);
const TypeInfo &getWitnessTablePtrTypeInfo();
const TypeInfo &getTypeMetadataPtrTypeInfo();
const TypeInfo &getObjCClassPtrTypeInfo();
const LoadableTypeInfo &getOpaqueStorageTypeInfo(Size size, Alignment align);
const LoadableTypeInfo &
getReferenceObjectTypeInfo(ReferenceCounting refcounting);
const LoadableTypeInfo &getNativeObjectTypeInfo();
const LoadableTypeInfo &getUnknownObjectTypeInfo();
const LoadableTypeInfo &getBridgeObjectTypeInfo();
const LoadableTypeInfo &getRawPointerTypeInfo();
llvm::Type *getStorageTypeForUnlowered(Type T);
llvm::Type *getStorageTypeForLowered(CanType T);
llvm::Type *getStorageType(SILType T);
llvm::PointerType *getStoragePointerTypeForUnlowered(Type T);
llvm::PointerType *getStoragePointerTypeForLowered(CanType T);
llvm::PointerType *getStoragePointerType(SILType T);
llvm::StructType *createNominalType(CanType type);
llvm::StructType *createNominalType(ProtocolCompositionType *T);
void getSchema(SILType T, ExplosionSchema &schema);
ExplosionSchema getSchema(SILType T);
unsigned getExplosionSize(SILType T);
llvm::PointerType *isSingleIndirectValue(SILType T);
bool isKnownEmpty(SILType type, ResilienceExpansion expansion);
bool isPOD(SILType type, ResilienceExpansion expansion);
clang::CanQual<clang::Type> getClangType(CanType type);
clang::CanQual<clang::Type> getClangType(SILType type);
clang::CanQual<clang::Type> getClangType(SILParameterInfo param);
const clang::ASTContext &getClangASTContext() {
assert(ClangASTContext &&
"requesting clang AST context without clang importer!");
return *ClangASTContext;
}
clang::CodeGen::CodeGenModule &getClangCGM() const;
bool isResilient(NominalTypeDecl *decl, ResilienceExpansion expansion);
ResilienceExpansion getResilienceExpansionForAccess(NominalTypeDecl *decl);
ResilienceExpansion getResilienceExpansionForLayout(NominalTypeDecl *decl);
ResilienceExpansion getResilienceExpansionForLayout(SILGlobalVariable *var);
SpareBitVector getSpareBitsForType(llvm::Type *scalarTy, Size size);
MetadataLayout &getMetadataLayout(NominalTypeDecl *decl);
NominalMetadataLayout &getNominalMetadataLayout(NominalTypeDecl *decl);
StructMetadataLayout &getMetadataLayout(StructDecl *decl);
ClassMetadataLayout &getClassMetadataLayout(ClassDecl *decl);
EnumMetadataLayout &getMetadataLayout(EnumDecl *decl);
ForeignClassMetadataLayout &getForeignMetadataLayout(ClassDecl *decl);
private:
TypeConverter &Types;
friend class TypeConverter;
const clang::ASTContext *ClangASTContext;
ClangTypeConverter *ClangTypes;
void initClangTypeConverter();
void destroyClangTypeConverter();
llvm::DenseMap<Decl*, MetadataLayout*> MetadataLayouts;
void destroyMetadataLayoutMap();
friend class GenericContextScope;
//--- Globals ---------------------------------------------------------------
public:
std::pair<llvm::GlobalVariable *, llvm::Constant *>
createStringConstant(StringRef Str, bool willBeRelativelyAddressed = false,
StringRef sectionName = "");
llvm::Constant *getAddrOfGlobalString(StringRef utf8,
bool willBeRelativelyAddressed = false);
llvm::Constant *getAddrOfGlobalUTF16String(StringRef utf8);
llvm::Constant *getAddrOfGlobalConstantString(StringRef utf8);
llvm::Constant *getAddrOfGlobalUTF16ConstantString(StringRef utf8);
llvm::Constant *getAddrOfObjCSelectorRef(StringRef selector);
llvm::Constant *getAddrOfObjCSelectorRef(SILDeclRef method);
llvm::Constant *getAddrOfObjCMethodName(StringRef methodName);
llvm::Constant *getAddrOfObjCProtocolRecord(ProtocolDecl *proto,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfObjCProtocolRef(ProtocolDecl *proto,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfKeyPathPattern(KeyPathPattern *pattern,
SILLocation diagLoc);
llvm::Constant *getAddrOfAssociatedTypeGenericParamRef(GenericSignature *sig,
CanDependentMemberType dmt);
ConstantReference getConstantReferenceForProtocolDescriptor(ProtocolDecl *proto);
void addUsedGlobal(llvm::GlobalValue *global);
void addCompilerUsedGlobal(llvm::GlobalValue *global);
void addObjCClass(llvm::Constant *addr, bool nonlazy);
void addFieldTypes(ArrayRef<CanType> fieldTypes);
void addProtocolConformance(const NormalProtocolConformance *conformance);
llvm::Constant *emitSwiftProtocols();
llvm::Constant *emitProtocolConformances();
llvm::Constant *emitTypeMetadataRecords();
llvm::Constant *emitFieldDescriptors();
llvm::Constant *getOrCreateHelperFunction(StringRef name,
llvm::Type *resultType,
ArrayRef<llvm::Type*> paramTypes,
llvm::function_ref<void(IRGenFunction &IGF)> generate,
bool setIsNoInline = false);
llvm::Constant *getOrCreateRetainFunction(const TypeInfo &objectTI, Type t,
llvm::Type *llvmType);
llvm::Constant *getOrCreateReleaseFunction(const TypeInfo &objectTI, Type t,
llvm::Type *llvmType);
typedef llvm::Constant *(IRGenModule::*OutlinedCopyAddrFunction)(
const TypeInfo &objectTI, llvm::Type *llvmType, SILType addrTy,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec);
void generateCallToOutlinedCopyAddr(
IRGenFunction &IGF, const TypeInfo &objectTI, Address dest, Address src,
SILType T, const OutlinedCopyAddrFunction MethodToCall,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
llvm::Constant *getOrCreateOutlinedInitializeWithTakeFunction(
const TypeInfo &objectTI, llvm::Type *llvmType, SILType addrTy,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
llvm::Constant *getOrCreateOutlinedInitializeWithCopyFunction(
const TypeInfo &objectTI, llvm::Type *llvmType, SILType addrTy,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
llvm::Constant *getOrCreateOutlinedAssignWithTakeFunction(
const TypeInfo &objectTI, llvm::Type *llvmType, SILType addrTy,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
llvm::Constant *getOrCreateOutlinedAssignWithCopyFunction(
const TypeInfo &objectTI, llvm::Type *llvmType, SILType addrTy,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
void generateCallToOutlinedDestroy(
IRGenFunction &IGF, const TypeInfo &objectTI, Address addr, SILType T,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
unsigned getCanTypeID(const CanType type);
private:
llvm::Constant *getAddrOfClangGlobalDecl(clang::GlobalDecl global,
ForDefinition_t forDefinition);
llvm::Constant *getOrCreateOutlinedCopyAddrHelperFunction(
const TypeInfo &objectTI, llvm::Type *llvmType, SILType addrTy,
std::string funcName,
llvm::function_ref<void(const TypeInfo &objectTI, IRGenFunction &IGF,
Address dest, Address src, SILType T)>
Generate,
const llvm::MapVector<CanType, llvm::Value *> *typeToMetadataVec =
nullptr);
llvm::DenseMap<LinkEntity, llvm::Constant*> GlobalVars;
llvm::DenseMap<LinkEntity, llvm::Constant*> GlobalGOTEquivalents;
llvm::DenseMap<LinkEntity, llvm::Function*> GlobalFuncs;
llvm::DenseSet<const clang::Decl *> GlobalClangDecls;
llvm::StringMap<std::pair<llvm::GlobalVariable*, llvm::Constant*>>
GlobalStrings;
llvm::StringMap<llvm::Constant*> GlobalUTF16Strings;
llvm::StringMap<std::pair<llvm::GlobalVariable*, llvm::Constant*>>
StringsForTypeRef;
llvm::DenseMap<CanType, llvm::GlobalVariable*> TypeRefs;
llvm::StringMap<std::pair<llvm::GlobalVariable*, llvm::Constant*>> FieldNames;
llvm::StringMap<llvm::Constant*> ObjCSelectorRefs;
llvm::StringMap<llvm::Constant*> ObjCMethodNames;
/// Maps to constant swift 'String's.
llvm::StringMap<llvm::Constant*> GlobalConstantStrings;
llvm::StringMap<llvm::Constant*> GlobalConstantUTF16Strings;
/// LLVMUsed - List of global values which are required to be
/// present in the object file; bitcast to i8*. This is used for
/// forcing visibility of symbols which may otherwise be optimized
/// out.
SmallVector<llvm::WeakTrackingVH, 4> LLVMUsed;
/// LLVMCompilerUsed - List of global values which are required to be
/// present in the object file; bitcast to i8*. This is used for
/// forcing visibility of symbols which may otherwise be optimized
/// out.
///
/// Similar to LLVMUsed, but emitted as llvm.compiler.used.
SmallVector<llvm::WeakTrackingVH, 4> LLVMCompilerUsed;
/// Metadata nodes for autolinking info.
SmallVector<llvm::MDNode *, 32> AutolinkEntries;
/// List of Objective-C classes, bitcast to i8*.
SmallVector<llvm::WeakTrackingVH, 4> ObjCClasses;
/// List of Objective-C classes that require nonlazy realization, bitcast to
/// i8*.
SmallVector<llvm::WeakTrackingVH, 4> ObjCNonLazyClasses;
/// List of Objective-C categories, bitcast to i8*.
SmallVector<llvm::WeakTrackingVH, 4> ObjCCategories;
/// List of non-ObjC protocols described by this module.
SmallVector<ProtocolDecl *, 4> SwiftProtocols;
/// List of protocol conformances to generate records for.
SmallVector<const NormalProtocolConformance *, 4> ProtocolConformances;
/// List of nominal types to generate type metadata records for.
SmallVector<NominalTypeDecl *, 4> RuntimeResolvableTypes;
/// List of ExtensionDecls corresponding to the generated
/// categories.
SmallVector<ExtensionDecl*, 4> ObjCCategoryDecls;
/// List of fields descriptors to register in runtime.
SmallVector<llvm::GlobalVariable *, 4> FieldDescriptors;
/// Map of Objective-C protocols and protocol references, bitcast to i8*.
/// The interesting global variables relating to an ObjC protocol.
struct ObjCProtocolPair {
/// The global variable that contains the protocol record.
llvm::WeakTrackingVH record;
/// The global variable that contains the indirect reference to the
/// protocol record.
llvm::WeakTrackingVH ref;
};
llvm::DenseMap<ProtocolDecl*, ObjCProtocolPair> ObjCProtocols;
llvm::SmallVector<ProtocolDecl*, 4> LazyObjCProtocolDefinitions;
llvm::DenseMap<KeyPathPattern*, llvm::GlobalVariable*> KeyPathPatterns;
/// Uniquing key for a fixed type layout record.
struct FixedLayoutKey {
unsigned size;
unsigned numExtraInhabitants;
unsigned align: 16;
unsigned pod: 1;
unsigned bitwiseTakable: 1;
};
friend struct ::llvm::DenseMapInfo<swift::irgen::IRGenModule::FixedLayoutKey>;
llvm::DenseMap<FixedLayoutKey, llvm::Constant *> PrivateFixedLayouts;
/// A cache for layouts of statically initialized objects.
llvm::DenseMap<SILGlobalVariable *, std::unique_ptr<StructLayout>>
StaticObjectLayouts;
/// A mapping from order numbers to the LLVM functions which we
/// created for the SIL functions with those orders.
SuccessorMap<unsigned, llvm::Function*> EmittedFunctionsByOrder;
/// Mapping from archetype-containing CanType to UniqueID (for outline)
llvm::DenseMap<const swift::TypeBase *, unsigned> typeToUniqueID;
unsigned currUniqueID = 2;
ObjCProtocolPair getObjCProtocolGlobalVars(ProtocolDecl *proto);
void emitLazyObjCProtocolDefinitions();
void emitLazyObjCProtocolDefinition(ProtocolDecl *proto);
void emitGlobalLists();
void emitAutolinkInfo();
void cleanupClangCodeGenMetadata();
//--- Remote reflection metadata --------------------------------------------
public:
/// Section names.
std::string FieldTypeSection;
std::string BuiltinTypeSection;
std::string AssociatedTypeSection;
std::string CaptureDescriptorSection;
std::string ReflectionStringsSection;
std::string ReflectionTypeRefSection;
/// Builtin types referenced by types in this module when emitting
/// reflection metadata.
llvm::SetVector<CanType> BuiltinTypes;
/// Opaque but fixed-size types for which we also emit builtin type
/// descriptors, allowing the reflection library to layout these types
/// without knowledge of their contents. This includes imported structs
/// and fixed-size multi-payload enums.
llvm::SetVector<const NominalTypeDecl *> OpaqueTypes;
/// Imported classes referenced by types in this module when emitting
/// reflection metadata.
llvm::SetVector<const ClassDecl *> ImportedClasses;
/// Imported protocols referenced by types in this module when emitting
/// reflection metadata.
llvm::SetVector<const ProtocolDecl *> ImportedProtocols;
/// Imported structs referenced by types in this module when emitting
/// reflection metadata.
llvm::SetVector<const StructDecl *> ImportedStructs;
llvm::Constant *getAddrOfStringForTypeRef(StringRef mangling);
llvm::Constant *getAddrOfStringForTypeRef(const SymbolicMangling &mangling);
llvm::Constant *getAddrOfFieldName(StringRef Name);
llvm::Constant *getAddrOfCaptureDescriptor(SILFunction &caller,
CanSILFunctionType origCalleeType,
CanSILFunctionType substCalleeType,
SubstitutionList subs,
const HeapLayout &layout);
llvm::Constant *getAddrOfBoxDescriptor(CanType boxedType);
void emitAssociatedTypeMetadataRecord(const ProtocolConformance *Conformance);
void emitFieldMetadataRecord(const NominalTypeDecl *Decl);
/// Emit a reflection metadata record for a builtin type referenced
/// from this module.
void emitBuiltinTypeMetadataRecord(CanType builtinType);
/// Emit a reflection metadata record for an imported type referenced
/// from this module.
void emitOpaqueTypeMetadataRecord(const NominalTypeDecl *nominalDecl);
/// Some nominal type declarations require us to emit a fixed-size type
/// descriptor, because they have special layout considerations.
bool shouldEmitOpaqueTypeMetadataRecord(const NominalTypeDecl *nominalDecl);
/// Emit reflection metadata records for builtin and imported types referenced
/// from this module.
void emitBuiltinReflectionMetadata();
/// Emit a symbol identifying the reflection metadata version.
void emitReflectionMetadataVersion();
const char *getBuiltinTypeMetadataSectionName();
const char *getFieldTypeMetadataSectionName();
const char *getAssociatedTypeMetadataSectionName();
const char *getCaptureDescriptorMetadataSectionName();
const char *getReflectionStringsSectionName();
const char *getReflectionTypeRefSectionName();
//--- Runtime ---------------------------------------------------------------
public:
llvm::Constant *getEmptyTupleMetadata();
llvm::Constant *getObjCEmptyCachePtr();
llvm::Constant *getObjCEmptyVTablePtr();
llvm::InlineAsm *getObjCRetainAutoreleasedReturnValueMarker();
ClassDecl *getObjCRuntimeBaseForSwiftRootClass(ClassDecl *theClass);
ClassDecl *getObjCRuntimeBaseClass(Identifier name, Identifier objcName);
llvm::Module *getModule() const;
llvm::Module *releaseModule();
llvm::AttributeList getAllocAttrs();
private:
llvm::Constant *EmptyTupleMetadata = nullptr;
llvm::Constant *ObjCEmptyCachePtr = nullptr;
llvm::Constant *ObjCEmptyVTablePtr = nullptr;
llvm::Constant *ObjCISAMaskPtr = nullptr;
Optional<llvm::InlineAsm*> ObjCRetainAutoreleasedReturnValueMarker;
llvm::DenseMap<Identifier, ClassDecl*> SwiftRootClasses;
llvm::AttributeList AllocAttrs;
#define FUNCTION_ID(Id) \
public: \
llvm::Constant *get##Id##Fn(); \
private: \
llvm::Constant *Id##Fn = nullptr;
#include "swift/Runtime/RuntimeFunctions.def"
llvm::Constant *FixLifetimeFn = nullptr;
mutable Optional<SpareBitVector> HeapPointerSpareBits;
//--- Generic ---------------------------------------------------------------
public:
llvm::Constant *getFixLifetimeFn();
/// The constructor.
///
/// The \p SF is the source file for which the llvm module is generated when
/// doing multi-threaded whole-module compilation. Otherwise it is null.
IRGenModule(IRGenerator &irgen, std::unique_ptr<llvm::TargetMachine> &&target,
SourceFile *SF, llvm::LLVMContext &LLVMContext,
StringRef ModuleName, StringRef OutputFilename,
StringRef MainInputFilenameForDebugInfo);
~IRGenModule();
llvm::LLVMContext &getLLVMContext() const { return LLVMContext; }
void emitSourceFile(SourceFile &SF, unsigned StartElem);
void addLinkLibrary(const LinkLibrary &linkLib);
/// Attempt to finalize the module.
///
/// This can fail, in which it will return false and the module will be
/// invalid.
bool finalize();
void constructInitialFnAttributes(llvm::AttrBuilder &Attrs,
OptimizationMode FuncOptMode =
OptimizationMode::NotSet);
llvm::AttributeList constructInitialAttributes();
void emitProtocolDecl(ProtocolDecl *D);
void emitEnumDecl(EnumDecl *D);
void emitStructDecl(StructDecl *D);
void emitClassDecl(ClassDecl *D);
void emitExtension(ExtensionDecl *D);
void emitSILGlobalVariable(SILGlobalVariable *gv);
void emitCoverageMapping();
void emitSILFunction(SILFunction *f);
void emitSILWitnessTable(SILWitnessTable *wt);
void emitSILStaticInitializers();
llvm::Constant *emitFixedTypeLayout(CanType t, const FixedTypeInfo &ti);
void emitProtocolConformance(const NormalProtocolConformance *conformance);
void emitNestedTypeDecls(DeclRange members);
void emitClangDecl(const clang::Decl *decl);
void finalizeClangCodeGen();
void finishEmitAfterTopLevel();
Signature getSignature(CanSILFunctionType fnType);
llvm::FunctionType *getFunctionType(CanSILFunctionType type,
llvm::AttributeList &attrs,
ForeignFunctionInfo *foreignInfo=nullptr);
ForeignFunctionInfo getForeignFunctionInfo(CanSILFunctionType type);
llvm::Constant *getSize(Size size);
llvm::Constant *getAlignment(Alignment align);
llvm::Constant *getBool(bool condition);
/// Cast the given constant to i8*.
llvm::Constant *getOpaquePtr(llvm::Constant *pointer);
llvm::Function *getAddrOfDispatchThunk(SILDeclRef declRef,
ForDefinition_t forDefinition);
llvm::Function *emitDispatchThunk(SILDeclRef declRef);
Address getAddrOfFieldOffset(VarDecl *D, ForDefinition_t forDefinition);
llvm::Function *getAddrOfValueWitness(CanType concreteType,
ValueWitness index,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfValueWitnessTable(CanType concreteType,
ConstantInit init = ConstantInit());
Optional<llvm::Function*> getAddrOfIVarInitDestroy(ClassDecl *cd,
bool isDestroyer,
bool isForeign,
ForDefinition_t forDefinition);
llvm::GlobalValue *defineTypeMetadata(CanType concreteType,
bool isIndirect,
bool isPattern,
bool isConstant,
ConstantInitFuture init,
llvm::StringRef section = {});
TypeEntityReference getTypeEntityReference(NominalTypeDecl *D);
llvm::Constant *getAddrOfTypeMetadata(CanType concreteType);
ConstantReference getAddrOfTypeMetadata(CanType concreteType,
SymbolReferenceKind kind);
llvm::Constant *getAddrOfTypeMetadataPattern(NominalTypeDecl *D);
llvm::Constant *getAddrOfTypeMetadataPattern(NominalTypeDecl *D,
bool isConstant,
ConstantInit init,
StringRef section);
llvm::Function *getAddrOfTypeMetadataInstantiationFunction(NominalTypeDecl *D,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfTypeMetadataInstantiationCache(NominalTypeDecl *D,
ForDefinition_t forDefinition);
llvm::Function *getAddrOfTypeMetadataAccessFunction(CanType type,
ForDefinition_t forDefinition);
llvm::Function *getAddrOfGenericTypeMetadataAccessFunction(
NominalTypeDecl *nominal,
ArrayRef<llvm::Type *> genericArgs,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfTypeMetadataLazyCacheVariable(CanType type,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfForeignTypeMetadataCandidate(CanType concreteType);
/// Determine whether the given type requires foreign type metadata.
bool requiresForeignTypeMetadata(CanType type);
llvm::Constant *getAddrOfClassMetadataBounds(ClassDecl *D,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfTypeContextDescriptor(NominalTypeDecl *D,
RequireMetadata_t requireMetadata,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfAnonymousContextDescriptor(DeclContext *DC,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfExtensionContextDescriptor(ExtensionDecl *ED,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfModuleContextDescriptor(ModuleDecl *D,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfObjCModuleContextDescriptor();
llvm::Constant *getAddrOfClangImporterModuleContextDescriptor();
ConstantReference getAddrOfParentContextDescriptor(DeclContext *from);
llvm::Constant *getAddrOfProtocolDescriptor(ProtocolDecl *D,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfProtocolConformanceDescriptor(
const NormalProtocolConformance *conformance,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfPropertyDescriptor(AbstractStorageDecl *D,
ConstantInit definition = ConstantInit());
llvm::Constant *getAddrOfObjCClass(ClassDecl *D,
ForDefinition_t forDefinition);
Address getAddrOfObjCClassRef(ClassDecl *D);
llvm::Constant *getAddrOfMetaclassObject(ClassDecl *D,
ForDefinition_t forDefinition);
llvm::Function *getAddrOfSILFunction(SILFunction *f,
ForDefinition_t forDefinition);
llvm::Function *getAddrOfContinuationPrototype(CanSILFunctionType fnType);
Address getAddrOfSILGlobalVariable(SILGlobalVariable *var,
const TypeInfo &ti,
ForDefinition_t forDefinition);
llvm::Function *getAddrOfWitnessTableAccessFunction(
const NormalProtocolConformance *C,
ForDefinition_t forDefinition);
llvm::Function *getAddrOfWitnessTableLazyAccessFunction(
const NormalProtocolConformance *C,
CanType conformingType,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfWitnessTableLazyCacheVariable(
const NormalProtocolConformance *C,
CanType conformingType,
ForDefinition_t forDefinition);
llvm::Constant *getAddrOfWitnessTable(const NormalProtocolConformance *C,
ConstantInit definition = ConstantInit());
llvm::Constant *
getAddrOfGenericWitnessTableCache(const NormalProtocolConformance *C,
ForDefinition_t forDefinition);
llvm::Function *
getAddrOfGenericWitnessTableInstantiationFunction(
const NormalProtocolConformance *C);
llvm::Function *getAddrOfAssociatedTypeMetadataAccessFunction(
const NormalProtocolConformance *C,
AssociatedType association);
llvm::Function *getAddrOfAssociatedTypeWitnessTableAccessFunction(
const NormalProtocolConformance *C,
const AssociatedConformance &association);
Address getAddrOfObjCISAMask();
/// Retrieve the generic environment for the current generic context.
///
/// Fails if there is no generic context.
GenericEnvironment *getGenericEnvironment();
ConstantReference
getAddrOfLLVMVariableOrGOTEquivalent(LinkEntity entity, Alignment alignment,
llvm::Type *defaultType,
ConstantReference::Directness forceIndirect = ConstantReference::Direct);
llvm::Constant *
emitRelativeReference(ConstantReference target,
llvm::Constant *base,
ArrayRef<unsigned> baseIndices);
llvm::Constant *
emitDirectRelativeReference(llvm::Constant *target,
llvm::Constant *base,
ArrayRef<unsigned> baseIndices);
/// Mark a global variable as true-const by putting it in the text section of
/// the binary.
void setTrueConstGlobal(llvm::GlobalVariable *var);
/// Add the swiftself attribute.
void addSwiftSelfAttributes(llvm::AttributeList &attrs, unsigned argIndex);
/// Add the swifterror attribute.
void addSwiftErrorAttributes(llvm::AttributeList &attrs, unsigned argIndex);
void emitSharedContextDescriptor(DeclContext *dc);
private:
llvm::Constant *
getAddrOfSharedContextDescriptor(LinkEntity entity,
ConstantInit definition,
llvm::function_ref<void()> emit);
llvm::Constant *getAddrOfLLVMVariable(LinkEntity entity,
Alignment alignment,
ConstantInit definition,
llvm::Type *defaultType,
DebugTypeInfo debugType);
llvm::Constant *getAddrOfLLVMVariable(LinkEntity entity,
Alignment alignment,
ForDefinition_t forDefinition,
llvm::Type *defaultType,
DebugTypeInfo debugType);
ConstantReference getAddrOfLLVMVariable(LinkEntity entity,
Alignment alignment,
ConstantInit definition,
llvm::Type *defaultType,
DebugTypeInfo debugType,
SymbolReferenceKind refKind);
void emitLazyPrivateDefinitions();
void addRuntimeResolvableType(NominalTypeDecl *nominal);
/// Add all conformances of \p Nominal to LazyWitnessTables.
void addLazyConformances(NominalTypeDecl *Nominal);
//--- Global context emission --------------------------------------------------
public:
void emitRuntimeRegistration();
void emitVTableStubs();
void emitTypeVerifier();
/// Create llvm metadata which encodes the branch weights given by
/// \p TrueCount and \p FalseCount.
llvm::MDNode *createProfileWeights(uint64_t TrueCount,
uint64_t FalseCount) const;
private:
void emitGlobalDecl(Decl *D);
};
/// Stores a pointer to an IRGenModule.
/// As long as the CurrentIGMPtr is alive, the CurrentIGM in the dispatcher
/// is set to the containing IRGenModule.
class CurrentIGMPtr {
IRGenModule *IGM;
public:
CurrentIGMPtr(IRGenModule *IGM) : IGM(IGM) {
assert(IGM);
assert(!IGM->IRGen.CurrentIGM && "Another CurrentIGMPtr is alive");
IGM->IRGen.CurrentIGM = IGM;
}
~CurrentIGMPtr() {
IGM->IRGen.CurrentIGM = nullptr;
}
IRGenModule *get() const { return IGM; }
IRGenModule *operator->() const { return IGM; }
};
/// Workaround to disable thumb-mode until debugger support is there.
bool shouldRemoveTargetFeature(StringRef);
} // end namespace irgen
} // end namespace swift
namespace llvm {
template<>
struct DenseMapInfo<swift::irgen::IRGenModule::FixedLayoutKey> {
using FixedLayoutKey = swift::irgen::IRGenModule::FixedLayoutKey;
static inline FixedLayoutKey getEmptyKey() {
return {0, 0xFFFFFFFFu, 0, 0, 0};
}
static inline FixedLayoutKey getTombstoneKey() {
return {0, 0xFFFFFFFEu, 0, 0, 0};
}
static unsigned getHashValue(const FixedLayoutKey &key) {
return hash_combine(key.size, key.numExtraInhabitants, key.align,
(bool)key.pod, (bool)key.bitwiseTakable);
}
static bool isEqual(const FixedLayoutKey &a, const FixedLayoutKey &b) {
return a.size == b.size
&& a.numExtraInhabitants == b.numExtraInhabitants
&& a.align == b.align
&& a.pod == b.pod
&& a.bitwiseTakable == b.bitwiseTakable;
}
};
}
#endif
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