IRGenModule::IRGenModule(IRGenerator &irgen,
std::unique_ptr<llvm::TargetMachine> &&target,
SourceFile *SF, llvm::LLVMContext &LLVMContext,
StringRef ModuleName, StringRef OutputFilename,
StringRef MainInputFilenameForDebugInfo)
: IRGen(irgen), Context(irgen.SIL.getASTContext()),
ClangCodeGen(createClangCodeGenerator(Context, LLVMContext, irgen.Opts,
ModuleName)),
Module(*ClangCodeGen->GetModule()), LLVMContext(Module.getContext()),
DataLayout(irgen.getClangDataLayout()),
Triple(irgen.getEffectiveClangTriple()), TargetMachine(std::move(target)),
silConv(irgen.SIL), OutputFilename(OutputFilename),
MainInputFilenameForDebugInfo(MainInputFilenameForDebugInfo),
TargetInfo(SwiftTargetInfo::get(*this)), DebugInfo(nullptr),
ModuleHash(nullptr), ObjCInterop(Context.LangOpts.EnableObjCInterop),
UseDarwinPreStableABIBit(Context.LangOpts.UseDarwinPreStableABIBit),
Types(*new TypeConverter(*this)) {
irgen.addGenModule(SF, this);
auto &opts = irgen.Opts;
EnableValueNames = opts.shouldProvideValueNames();
VoidTy = llvm::Type::getVoidTy(getLLVMContext());
Int1Ty = llvm::Type::getInt1Ty(getLLVMContext());
Int8Ty = llvm::Type::getInt8Ty(getLLVMContext());
Int16Ty = llvm::Type::getInt16Ty(getLLVMContext());
Int32Ty = llvm::Type::getInt32Ty(getLLVMContext());
Int32PtrTy = Int32Ty->getPointerTo();
Int64Ty = llvm::Type::getInt64Ty(getLLVMContext());
Int8PtrTy = llvm::Type::getInt8PtrTy(getLLVMContext());
Int8PtrPtrTy = Int8PtrTy->getPointerTo(0);
SizeTy = DataLayout.getIntPtrType(getLLVMContext(), /*addrspace*/ 0);
// For the relative address type, we want to use the int32 bit type
// on most architectures, e.g. x86_64, because it produces valid
// fixups/relocations. The exception is 16-bit architectures,
// so we shorten the relative address type there.
if (SizeTy->getBitWidth()<32) {
RelativeAddressTy = SizeTy;
} else {
RelativeAddressTy = Int32Ty;
}
RelativeAddressPtrTy = RelativeAddressTy->getPointerTo();
FloatTy = llvm::Type::getFloatTy(getLLVMContext());
DoubleTy = llvm::Type::getDoubleTy(getLLVMContext());
auto CI = static_cast<ClangImporter*>(&*Context.getClangModuleLoader());
assert(CI && "no clang module loader");
auto &clangASTContext = CI->getClangASTContext();
ObjCBoolTy = Int1Ty;
if (clangASTContext.getTargetInfo().useSignedCharForObjCBool())
ObjCBoolTy = Int8Ty;
RefCountedStructTy =
llvm::StructType::create(getLLVMContext(), "swift.refcounted");
RefCountedPtrTy = RefCountedStructTy->getPointerTo(/*addrspace*/ 0);
RefCountedNull = llvm::ConstantPointerNull::get(RefCountedPtrTy);
// For now, references storage types are just pointers.
#define CHECKED_REF_STORAGE(Name, name, ...) \
Name##ReferencePtrTy = \
createStructPointerType(*this, "swift." #name, { RefCountedPtrTy });
#include "swift/AST/ReferenceStorage.def"
// A type metadata record is the structure pointed to by the canonical
// address point of a type metadata. This is at least one word, and
// potentially more than that, past the start of the actual global
// structure.
TypeMetadataStructTy = createStructType(*this, "swift.type", {
MetadataKindTy // MetadataKind Kind;
});
TypeMetadataPtrTy = TypeMetadataStructTy->getPointerTo(DefaultAS);
TypeMetadataResponseTy = createStructType(*this, "swift.metadata_response", {
TypeMetadataPtrTy,
SizeTy
});
OffsetPairTy = llvm::StructType::get(getLLVMContext(), { SizeTy, SizeTy });
// The TypeLayout structure, including all possible trailing components.
FullTypeLayoutTy = createStructType(*this, "swift.full_type_layout", {
SizeTy, // size
SizeTy, // flags
SizeTy, // alignment
SizeTy // extra inhabitant flags (optional)
});
// A protocol descriptor describes a protocol. It is not type metadata in
// and of itself, but is referenced in the structure of existential type
// metadata records.
ProtocolDescriptorStructTy = createStructType(*this, "swift.protocol", {
Int8PtrTy, // objc isa
Int8PtrTy, // name
Int8PtrTy, // inherited protocols
Int8PtrTy, // required objc instance methods
Int8PtrTy, // required objc class methods
Int8PtrTy, // optional objc instance methods
Int8PtrTy, // optional objc class methods
Int8PtrTy, // objc properties
Int32Ty, // size
Int32Ty, // flags
Int32Ty, // total requirement count
Int32Ty, // requirements array
RelativeAddressTy, // superclass
RelativeAddressTy // associated type names
});
ProtocolDescriptorPtrTy = ProtocolDescriptorStructTy->getPointerTo();
ProtocolRequirementStructTy =
createStructType(*this, "swift.protocol_requirement", {
Int32Ty, // flags
RelativeAddressTy, // default implementation
});
// A tuple type metadata record has a couple extra fields.
auto tupleElementTy = createStructType(*this, "swift.tuple_element_type", {
TypeMetadataPtrTy, // Metadata *Type;
SizeTy // size_t Offset;
});
TupleTypeMetadataPtrTy = createStructPointerType(*this, "swift.tuple_type", {
TypeMetadataStructTy, // (base)
SizeTy, // size_t NumElements;
Int8PtrTy, // const char *Labels;
llvm::ArrayType::get(tupleElementTy, 0) // Element Elements[];
});
// A full type metadata record is basically just an adjustment to the
// address point of a type metadata. Resilience may cause
// additional data to be laid out prior to this address point.
FullTypeMetadataStructTy = createStructType(*this, "swift.full_type", {
WitnessTablePtrTy,
TypeMetadataStructTy
});
FullTypeMetadataPtrTy = FullTypeMetadataStructTy->getPointerTo(DefaultAS);
DeallocatingDtorTy = llvm::FunctionType::get(VoidTy, RefCountedPtrTy, false);
llvm::Type *dtorPtrTy = DeallocatingDtorTy->getPointerTo();
// A full heap metadata is basically just an additional small prefix
// on a full metadata, used for metadata corresponding to heap
// allocations.
FullHeapMetadataStructTy =
createStructType(*this, "swift.full_heapmetadata", {
dtorPtrTy,
WitnessTablePtrTy,
TypeMetadataStructTy
});
FullHeapMetadataPtrTy = FullHeapMetadataStructTy->getPointerTo(DefaultAS);
// A full box metadata is non-type heap metadata for a heap allocation of a
// single value. The box tracks the offset to the value inside the box.
FullBoxMetadataStructTy =
createStructType(*this, "swift.full_boxmetadata", {
dtorPtrTy,
WitnessTablePtrTy,
TypeMetadataStructTy,
Int32Ty,
CaptureDescriptorPtrTy,
});
FullBoxMetadataPtrTy = FullBoxMetadataStructTy->getPointerTo(DefaultAS);
// This must match struct HeapObject in the runtime.
llvm::Type *refCountedElts[] = {TypeMetadataPtrTy, IntPtrTy};
RefCountedStructTy->setBody(refCountedElts);
RefCountedStructSize =
Size(DataLayout.getStructLayout(RefCountedStructTy)->getSizeInBytes());
PtrSize = Size(DataLayout.getPointerSize(DefaultAS));
FunctionPairTy = createStructType(*this, "swift.function", {
FunctionPtrTy,
RefCountedPtrTy,
});
OpaqueTy = llvm::StructType::create(LLVMContext, "swift.opaque");
OpaquePtrTy = OpaqueTy->getPointerTo(DefaultAS);
NoEscapeFunctionPairTy = createStructType(*this, "swift.noescape.function", {
FunctionPtrTy,
OpaquePtrTy,
});
ProtocolRecordTy =
createStructType(*this, "swift.protocolref", {
RelativeAddressTy
});
ProtocolRecordPtrTy = ProtocolRecordTy->getPointerTo();
ProtocolConformanceDescriptorTy
= createStructType(*this, "swift.protocol_conformance_descriptor", {
RelativeAddressTy,
RelativeAddressTy,
RelativeAddressTy,
Int32Ty
});
ProtocolConformanceDescriptorPtrTy
= ProtocolConformanceDescriptorTy->getPointerTo(DefaultAS);
TypeContextDescriptorTy
= llvm::StructType::create(LLVMContext, "swift.type_descriptor");
TypeContextDescriptorPtrTy
= TypeContextDescriptorTy->getPointerTo(DefaultAS);
ClassContextDescriptorTy =
llvm::StructType::get(LLVMContext, {
Int32Ty, // context flags
Int32Ty, // parent
Int32Ty, // name
Int32Ty, // kind
Int32Ty, // accessor function
Int32Ty, // num fields
Int32Ty, // field offset vector
Int32Ty, // is_reflectable flag
Int32Ty, // (Generics Descriptor) argument offset
Int32Ty, // (Generics Descriptor) num params
Int32Ty, // (Generics Descriptor) num requirements
Int32Ty, // (Generics Descriptor) num key arguments
Int32Ty, // (Generics Descriptor) num extra arguments
Int32Ty, // (VTable Descriptor) offset
Int32Ty, // (VTable Descriptor) size
Int32Ty, // (Methods Descriptor) accessor
Int32Ty, // (Methods Descriptor) flags
}, /*packed=*/true);
MethodDescriptorStructTy
= createStructType(*this, "swift.method_descriptor", {
Int32Ty,
RelativeAddressTy,
});
MethodOverrideDescriptorStructTy
= createStructType(*this, "swift.method_override_descriptor", {
RelativeAddressTy,
RelativeAddressTy,
RelativeAddressTy
});
TypeMetadataRecordTy
= createStructType(*this, "swift.type_metadata_record", {
RelativeAddressTy
});
TypeMetadataRecordPtrTy
= TypeMetadataRecordTy->getPointerTo(DefaultAS);
FieldDescriptorTy
= llvm::StructType::create(LLVMContext, "swift.field_descriptor");
FieldDescriptorPtrTy = FieldDescriptorTy->getPointerTo(DefaultAS);
FieldDescriptorPtrPtrTy = FieldDescriptorPtrTy->getPointerTo(DefaultAS);
FixedBufferTy = nullptr;
for (unsigned i = 0; i != MaxNumValueWitnesses; ++i)
ValueWitnessTys[i] = nullptr;
ObjCPtrTy = llvm::StructType::create(getLLVMContext(), "objc_object")
->getPointerTo(DefaultAS);
BridgeObjectPtrTy = llvm::StructType::create(getLLVMContext(), "swift.bridge")
->getPointerTo(DefaultAS);
ObjCClassStructTy = llvm::StructType::create(LLVMContext, "objc_class");
ObjCClassPtrTy = ObjCClassStructTy->getPointerTo(DefaultAS);
llvm::Type *objcClassElts[] = {
ObjCClassPtrTy,
ObjCClassPtrTy,
OpaquePtrTy,
OpaquePtrTy,
IntPtrTy
};
ObjCClassStructTy->setBody(objcClassElts);
ObjCSuperStructTy = llvm::StructType::create(LLVMContext, "objc_super");
ObjCSuperPtrTy = ObjCSuperStructTy->getPointerTo(DefaultAS);
llvm::Type *objcSuperElts[] = {
ObjCPtrTy,
ObjCClassPtrTy
};
ObjCSuperStructTy->setBody(objcSuperElts);
ObjCBlockStructTy = llvm::StructType::create(LLVMContext, "objc_block");
ObjCBlockPtrTy = ObjCBlockStructTy->getPointerTo(DefaultAS);
llvm::Type *objcBlockElts[] = {
ObjCClassPtrTy, // isa
Int32Ty, // flags
Int32Ty, // reserved
FunctionPtrTy, // invoke function pointer
Int8PtrTy, // TODO: block descriptor pointer.
// We will probably need a struct type for that at some
// point too.
};
ObjCBlockStructTy->setBody(objcBlockElts);
auto ErrorStructTy = llvm::StructType::create(LLVMContext, "swift.error");
// ErrorStruct is currently opaque to the compiler.
ErrorPtrTy = ErrorStructTy->getPointerTo(DefaultAS);
llvm::Type *openedErrorTriple[] = {
OpaquePtrTy,
TypeMetadataPtrTy,
WitnessTablePtrTy,
};
OpenedErrorTripleTy = llvm::StructType::get(getLLVMContext(),
openedErrorTriple,
/*packed*/ false);
OpenedErrorTriplePtrTy = OpenedErrorTripleTy->getPointerTo(DefaultAS);
WitnessTablePtrPtrTy = WitnessTablePtrTy->getPointerTo(DefaultAS);
InvariantMetadataID = LLVMContext.getMDKindID("invariant.load");
InvariantNode = llvm::MDNode::get(LLVMContext, {});
DereferenceableID = LLVMContext.getMDKindID("dereferenceable");
C_CC = llvm::CallingConv::C;
// TODO: use "tinycc" on platforms that support it
DefaultCC = SWIFT_DEFAULT_LLVM_CC;
SwiftCC = llvm::CallingConv::Swift;
if (opts.DebugInfoLevel > IRGenDebugInfoLevel::None)
DebugInfo = IRGenDebugInfo::createIRGenDebugInfo(IRGen.Opts, *CI, *this,
Module,
MainInputFilenameForDebugInfo);
initClangTypeConverter();
if (ClangASTContext) {
auto atomicBoolTy = ClangASTContext->getAtomicType(ClangASTContext->BoolTy);
AtomicBoolSize = Size(ClangASTContext->getTypeSize(atomicBoolTy));
AtomicBoolAlign = Alignment(ClangASTContext->getTypeSize(atomicBoolTy));
}
IsSwiftErrorInRegister =
clang::CodeGen::swiftcall::isSwiftErrorLoweredInRegister(
ClangCodeGen->CGM());
DynamicReplacementsTy =
llvm::StructType::get(getLLVMContext(), {Int8PtrPtrTy, Int8PtrTy});
DynamicReplacementsPtrTy = DynamicReplacementsTy->getPointerTo(DefaultAS);
DynamicReplacementLinkEntryTy =
llvm::StructType::create(getLLVMContext(), "swift.dyn_repl_link_entry");
DynamicReplacementLinkEntryPtrTy =
DynamicReplacementLinkEntryTy->getPointerTo(DefaultAS);
llvm::Type *linkEntryFields[] = {
Int8PtrTy, // function pointer.
DynamicReplacementLinkEntryPtrTy // next.
};
DynamicReplacementLinkEntryTy->setBody(linkEntryFields);
DynamicReplacementKeyTy = createStructType(*this, "swift.dyn_repl_key",
{RelativeAddressTy, Int32Ty});
}
IRGenModule::IRGenModule(IRGenModuleDispatcher &dispatcher, SourceFile *SF,
ASTContext &Context,
llvm::LLVMContext &LLVMContext,
IRGenOptions &Opts, StringRef ModuleName,
const llvm::DataLayout &DataLayout,
const llvm::Triple &Triple,
llvm::TargetMachine *TargetMachine,
SILModule *SILMod,
StringRef OutputFilename)
: Context(Context), Opts(Opts),
ClangCodeGen(createClangCodeGenerator(Context, LLVMContext, Opts, ModuleName)),
Module(*ClangCodeGen->GetModule()),
LLVMContext(Module.getContext()), DataLayout(DataLayout),
Triple(Triple), TargetMachine(TargetMachine),
SILMod(SILMod), OutputFilename(OutputFilename), dispatcher(dispatcher),
TargetInfo(SwiftTargetInfo::get(*this)),
DebugInfo(0), ModuleHash(nullptr),
ObjCInterop(Context.LangOpts.EnableObjCInterop),
Types(*new TypeConverter(*this))
{
dispatcher.addGenModule(SF, this);
// If the command line contains an explicit request about whether to add
// LLVM value names, honor it. Otherwise, add value names only if the
// final result is textual LLVM assembly.
if (Opts.HasValueNamesSetting) {
EnableValueNames = Opts.ValueNames;
} else {
EnableValueNames = (Opts.OutputKind == IRGenOutputKind::LLVMAssembly);
}
VoidTy = llvm::Type::getVoidTy(getLLVMContext());
Int1Ty = llvm::Type::getInt1Ty(getLLVMContext());
Int8Ty = llvm::Type::getInt8Ty(getLLVMContext());
Int16Ty = llvm::Type::getInt16Ty(getLLVMContext());
Int32Ty = llvm::Type::getInt32Ty(getLLVMContext());
Int64Ty = llvm::Type::getInt64Ty(getLLVMContext());
Int8PtrTy = llvm::Type::getInt8PtrTy(getLLVMContext());
Int8PtrPtrTy = Int8PtrTy->getPointerTo(0);
SizeTy = DataLayout.getIntPtrType(getLLVMContext(), /*addrspace*/ 0);
auto CI = static_cast<ClangImporter*>(&*Context.getClangModuleLoader());
assert(CI && "no clang module loader");
auto &clangASTContext = CI->getClangASTContext();
ObjCBoolTy = Int1Ty;
if (clangASTContext.getTargetInfo().useSignedCharForObjCBool())
ObjCBoolTy = Int8Ty;
RefCountedStructTy =
llvm::StructType::create(getLLVMContext(), "swift.refcounted");
RefCountedPtrTy = RefCountedStructTy->getPointerTo(/*addrspace*/ 0);
RefCountedNull = llvm::ConstantPointerNull::get(RefCountedPtrTy);
// For now, native weak references are just a pointer.
WeakReferencePtrTy =
createStructPointerType(*this, "swift.weak", { RefCountedPtrTy });
// Native unowned references are just a pointer.
UnownedReferencePtrTy =
createStructPointerType(*this, "swift.unowned", { RefCountedPtrTy });
// A type metadata record is the structure pointed to by the canonical
// address point of a type metadata. This is at least one word, and
// potentially more than that, past the start of the actual global
// structure.
TypeMetadataStructTy = createStructType(*this, "swift.type", {
MetadataKindTy // MetadataKind Kind;
});
TypeMetadataPtrTy = TypeMetadataStructTy->getPointerTo(DefaultAS);
// A protocol descriptor describes a protocol. It is not type metadata in
// and of itself, but is referenced in the structure of existential type
// metadata records.
ProtocolDescriptorStructTy = createStructType(*this, "swift.protocol", {
Int8PtrTy, // objc isa
Int8PtrTy, // name
Int8PtrTy, // inherited protocols
Int8PtrTy, // required objc instance methods
Int8PtrTy, // required objc class methods
Int8PtrTy, // optional objc instance methods
Int8PtrTy, // optional objc class methods
Int8PtrTy, // objc properties
Int32Ty, // size
Int32Ty, // flags
Int16Ty, // minimum witness count
Int16Ty // default witness count
});
ProtocolDescriptorPtrTy = ProtocolDescriptorStructTy->getPointerTo();
// A tuple type metadata record has a couple extra fields.
auto tupleElementTy = createStructType(*this, "swift.tuple_element_type", {
TypeMetadataPtrTy, // Metadata *Type;
SizeTy // size_t Offset;
});
TupleTypeMetadataPtrTy = createStructPointerType(*this, "swift.tuple_type", {
TypeMetadataStructTy, // (base)
SizeTy, // size_t NumElements;
Int8PtrTy, // const char *Labels;
llvm::ArrayType::get(tupleElementTy, 0) // Element Elements[];
});
// A full type metadata record is basically just an adjustment to the
// address point of a type metadata. Resilience may cause
// additional data to be laid out prior to this address point.
FullTypeMetadataStructTy = createStructType(*this, "swift.full_type", {
WitnessTablePtrTy,
TypeMetadataStructTy
});
FullTypeMetadataPtrTy = FullTypeMetadataStructTy->getPointerTo(DefaultAS);
// A metadata pattern is a structure from which generic type
// metadata are allocated. We leave this struct type intentionally
// opaque, because the compiler basically never needs to access
// anything from one.
TypeMetadataPatternStructTy =
llvm::StructType::create(getLLVMContext(), "swift.type_pattern");
TypeMetadataPatternPtrTy =
TypeMetadataPatternStructTy->getPointerTo(DefaultAS);
DeallocatingDtorTy = llvm::FunctionType::get(VoidTy, RefCountedPtrTy, false);
llvm::Type *dtorPtrTy = DeallocatingDtorTy->getPointerTo();
// A full heap metadata is basically just an additional small prefix
// on a full metadata, used for metadata corresponding to heap
// allocations.
FullHeapMetadataStructTy =
createStructType(*this, "swift.full_heapmetadata", {
dtorPtrTy,
WitnessTablePtrTy,
TypeMetadataStructTy
});
FullHeapMetadataPtrTy = FullHeapMetadataStructTy->getPointerTo(DefaultAS);
// A full box metadata is non-type heap metadata for a heap allocation of a
// single value. The box tracks the offset to the value inside the box.
FullBoxMetadataStructTy =
createStructType(*this, "swift.full_boxmetadata", {
dtorPtrTy,
WitnessTablePtrTy,
TypeMetadataStructTy,
Int32Ty,
});
FullBoxMetadataPtrTy = FullBoxMetadataStructTy->getPointerTo(DefaultAS);
llvm::Type *refCountedElts[] = { TypeMetadataPtrTy, Int32Ty, Int32Ty };
RefCountedStructTy->setBody(refCountedElts);
PtrSize = Size(DataLayout.getPointerSize(DefaultAS));
FunctionPairTy = createStructType(*this, "swift.function", {
FunctionPtrTy,
RefCountedPtrTy,
});
OpaquePtrTy = llvm::StructType::create(LLVMContext, "swift.opaque")
->getPointerTo(DefaultAS);
ProtocolConformanceRecordTy
= createStructType(*this, "swift.protocol_conformance", {
RelativeAddressTy,
RelativeAddressTy,
RelativeAddressTy,
Int32Ty
});
ProtocolConformanceRecordPtrTy
= ProtocolConformanceRecordTy->getPointerTo(DefaultAS);
NominalTypeDescriptorTy
= llvm::StructType::create(LLVMContext, "swift.type_descriptor");
NominalTypeDescriptorPtrTy
= NominalTypeDescriptorTy->getPointerTo(DefaultAS);
TypeMetadataRecordTy
= createStructType(*this, "swift.type_metadata_record", {
RelativeAddressTy,
Int32Ty
});
TypeMetadataRecordPtrTy
= TypeMetadataRecordTy->getPointerTo(DefaultAS);
FieldDescriptorTy
= llvm::StructType::create(LLVMContext, "swift.field_descriptor");
FieldDescriptorPtrTy = FieldDescriptorTy->getPointerTo(DefaultAS);
FixedBufferTy = nullptr;
for (unsigned i = 0; i != MaxNumValueWitnesses; ++i)
ValueWitnessTys[i] = nullptr;
ObjCPtrTy = llvm::StructType::create(getLLVMContext(), "objc_object")
->getPointerTo(DefaultAS);
BridgeObjectPtrTy = llvm::StructType::create(getLLVMContext(), "swift.bridge")
->getPointerTo(DefaultAS);
ObjCClassStructTy = llvm::StructType::create(LLVMContext, "objc_class");
ObjCClassPtrTy = ObjCClassStructTy->getPointerTo(DefaultAS);
llvm::Type *objcClassElts[] = {
ObjCClassPtrTy,
ObjCClassPtrTy,
OpaquePtrTy,
OpaquePtrTy,
IntPtrTy
};
ObjCClassStructTy->setBody(objcClassElts);
ObjCSuperStructTy = llvm::StructType::create(LLVMContext, "objc_super");
ObjCSuperPtrTy = ObjCSuperStructTy->getPointerTo(DefaultAS);
llvm::Type *objcSuperElts[] = {
ObjCPtrTy,
ObjCClassPtrTy
};
ObjCSuperStructTy->setBody(objcSuperElts);
ObjCBlockStructTy = llvm::StructType::create(LLVMContext, "objc_block");
ObjCBlockPtrTy = ObjCBlockStructTy->getPointerTo(DefaultAS);
llvm::Type *objcBlockElts[] = {
ObjCClassPtrTy, // isa
Int32Ty, // flags
Int32Ty, // reserved
FunctionPtrTy, // invoke function pointer
Int8PtrTy, // TODO: block descriptor pointer.
// We will probably need a struct type for that at some
// point too.
};
ObjCBlockStructTy->setBody(objcBlockElts);
auto ErrorStructTy = llvm::StructType::create(LLVMContext, "swift.error");
// ErrorStruct is currently opaque to the compiler.
ErrorPtrTy = ErrorStructTy->getPointerTo(DefaultAS);
llvm::Type *openedErrorTriple[] = {
OpaquePtrTy,
TypeMetadataPtrTy,
WitnessTablePtrTy,
};
OpenedErrorTripleTy = llvm::StructType::get(getLLVMContext(),
openedErrorTriple,
/*packed*/ false);
OpenedErrorTriplePtrTy = OpenedErrorTripleTy->getPointerTo(DefaultAS);
InvariantMetadataID = LLVMContext.getMDKindID("invariant.load");
InvariantNode = llvm::MDNode::get(LLVMContext, {});
DereferenceableID = LLVMContext.getMDKindID("dereferenceable");
// TODO: use "tinycc" on platforms that support it
RuntimeCC = llvm::CallingConv::C;
ABITypes = new CodeGenABITypes(clangASTContext, Module);
if (Opts.DebugInfoKind != IRGenDebugInfoKind::None) {
DebugInfo = new IRGenDebugInfo(Opts, *CI, *this, Module, SF);
}
initClangTypeConverter();
}
IRGenModule::IRGenModule(IRGenerator &irgen,
std::unique_ptr<llvm::TargetMachine> &&target,
SourceFile *SF, llvm::LLVMContext &LLVMContext,
StringRef ModuleName, StringRef OutputFilename)
: IRGen(irgen), Context(irgen.SIL.getASTContext()),
ClangCodeGen(createClangCodeGenerator(Context, LLVMContext, irgen.Opts,
ModuleName)),
Module(*ClangCodeGen->GetModule()), LLVMContext(Module.getContext()),
DataLayout(target->createDataLayout()), Triple(Context.LangOpts.Target),
TargetMachine(std::move(target)), silConv(irgen.SIL),
OutputFilename(OutputFilename),
TargetInfo(SwiftTargetInfo::get(*this)), DebugInfo(nullptr),
ModuleHash(nullptr), ObjCInterop(Context.LangOpts.EnableObjCInterop),
Types(*new TypeConverter(*this)) {
irgen.addGenModule(SF, this);
auto &opts = irgen.Opts;
EnableValueNames = opts.shouldProvideValueNames();
VoidTy = llvm::Type::getVoidTy(getLLVMContext());
Int1Ty = llvm::Type::getInt1Ty(getLLVMContext());
Int8Ty = llvm::Type::getInt8Ty(getLLVMContext());
Int16Ty = llvm::Type::getInt16Ty(getLLVMContext());
Int32Ty = llvm::Type::getInt32Ty(getLLVMContext());
Int64Ty = llvm::Type::getInt64Ty(getLLVMContext());
Int8PtrTy = llvm::Type::getInt8PtrTy(getLLVMContext());
Int8PtrPtrTy = Int8PtrTy->getPointerTo(0);
SizeTy = DataLayout.getIntPtrType(getLLVMContext(), /*addrspace*/ 0);
auto CI = static_cast<ClangImporter*>(&*Context.getClangModuleLoader());
assert(CI && "no clang module loader");
auto &clangASTContext = CI->getClangASTContext();
ObjCBoolTy = Int1Ty;
if (clangASTContext.getTargetInfo().useSignedCharForObjCBool())
ObjCBoolTy = Int8Ty;
RefCountedStructTy =
llvm::StructType::create(getLLVMContext(), "swift.refcounted");
RefCountedPtrTy = RefCountedStructTy->getPointerTo(/*addrspace*/ 0);
RefCountedNull = llvm::ConstantPointerNull::get(RefCountedPtrTy);
// For now, native weak references are just a pointer.
WeakReferencePtrTy =
createStructPointerType(*this, "swift.weak", { RefCountedPtrTy });
// Native unowned references are just a pointer.
UnownedReferencePtrTy =
createStructPointerType(*this, "swift.unowned", { RefCountedPtrTy });
// A type metadata record is the structure pointed to by the canonical
// address point of a type metadata. This is at least one word, and
// potentially more than that, past the start of the actual global
// structure.
TypeMetadataStructTy = createStructType(*this, "swift.type", {
MetadataKindTy // MetadataKind Kind;
});
TypeMetadataPtrTy = TypeMetadataStructTy->getPointerTo(DefaultAS);
// A protocol descriptor describes a protocol. It is not type metadata in
// and of itself, but is referenced in the structure of existential type
// metadata records.
ProtocolDescriptorStructTy = createStructType(*this, "swift.protocol", {
Int8PtrTy, // objc isa
Int8PtrTy, // name
Int8PtrTy, // inherited protocols
Int8PtrTy, // required objc instance methods
Int8PtrTy, // required objc class methods
Int8PtrTy, // optional objc instance methods
Int8PtrTy, // optional objc class methods
Int8PtrTy, // objc properties
Int32Ty, // size
Int32Ty, // flags
Int16Ty, // minimum witness count
Int16Ty, // default witness count
Int32Ty // padding
});
ProtocolDescriptorPtrTy = ProtocolDescriptorStructTy->getPointerTo();
// A tuple type metadata record has a couple extra fields.
auto tupleElementTy = createStructType(*this, "swift.tuple_element_type", {
TypeMetadataPtrTy, // Metadata *Type;
SizeTy // size_t Offset;
});
TupleTypeMetadataPtrTy = createStructPointerType(*this, "swift.tuple_type", {
TypeMetadataStructTy, // (base)
SizeTy, // size_t NumElements;
Int8PtrTy, // const char *Labels;
llvm::ArrayType::get(tupleElementTy, 0) // Element Elements[];
});
// A full type metadata record is basically just an adjustment to the
// address point of a type metadata. Resilience may cause
// additional data to be laid out prior to this address point.
FullTypeMetadataStructTy = createStructType(*this, "swift.full_type", {
WitnessTablePtrTy,
TypeMetadataStructTy
});
FullTypeMetadataPtrTy = FullTypeMetadataStructTy->getPointerTo(DefaultAS);
// A metadata pattern is a structure from which generic type
// metadata are allocated. We leave this struct type intentionally
// opaque, because the compiler basically never needs to access
// anything from one.
TypeMetadataPatternStructTy =
llvm::StructType::create(getLLVMContext(), "swift.type_pattern");
TypeMetadataPatternPtrTy =
TypeMetadataPatternStructTy->getPointerTo(DefaultAS);
DeallocatingDtorTy = llvm::FunctionType::get(VoidTy, RefCountedPtrTy, false);
llvm::Type *dtorPtrTy = DeallocatingDtorTy->getPointerTo();
// A full heap metadata is basically just an additional small prefix
// on a full metadata, used for metadata corresponding to heap
// allocations.
FullHeapMetadataStructTy =
createStructType(*this, "swift.full_heapmetadata", {
dtorPtrTy,
WitnessTablePtrTy,
TypeMetadataStructTy
});
FullHeapMetadataPtrTy = FullHeapMetadataStructTy->getPointerTo(DefaultAS);
// A full box metadata is non-type heap metadata for a heap allocation of a
// single value. The box tracks the offset to the value inside the box.
FullBoxMetadataStructTy =
createStructType(*this, "swift.full_boxmetadata", {
dtorPtrTy,
WitnessTablePtrTy,
TypeMetadataStructTy,
Int32Ty,
CaptureDescriptorPtrTy,
});
FullBoxMetadataPtrTy = FullBoxMetadataStructTy->getPointerTo(DefaultAS);
llvm::Type *refCountedElts[] = {TypeMetadataPtrTy, Int32Ty, Int32Ty};
RefCountedStructTy->setBody(refCountedElts);
PtrSize = Size(DataLayout.getPointerSize(DefaultAS));
FunctionPairTy = createStructType(*this, "swift.function", {
FunctionPtrTy,
RefCountedPtrTy,
});
OpaqueTy = llvm::StructType::create(LLVMContext, "swift.opaque");
OpaquePtrTy = OpaqueTy->getPointerTo(DefaultAS);
ProtocolConformanceRecordTy
= createStructType(*this, "swift.protocol_conformance", {
RelativeAddressTy,
RelativeAddressTy,
RelativeAddressTy,
Int32Ty
});
ProtocolConformanceRecordPtrTy
= ProtocolConformanceRecordTy->getPointerTo(DefaultAS);
NominalTypeDescriptorTy
= llvm::StructType::create(LLVMContext, "swift.type_descriptor");
NominalTypeDescriptorPtrTy
= NominalTypeDescriptorTy->getPointerTo(DefaultAS);
TypeMetadataRecordTy
= createStructType(*this, "swift.type_metadata_record", {
RelativeAddressTy,
Int32Ty
});
TypeMetadataRecordPtrTy
= TypeMetadataRecordTy->getPointerTo(DefaultAS);
FieldDescriptorTy
= llvm::StructType::create(LLVMContext, "swift.field_descriptor");
FieldDescriptorPtrTy = FieldDescriptorTy->getPointerTo(DefaultAS);
FixedBufferTy = nullptr;
for (unsigned i = 0; i != MaxNumValueWitnesses; ++i)
ValueWitnessTys[i] = nullptr;
ObjCPtrTy = llvm::StructType::create(getLLVMContext(), "objc_object")
->getPointerTo(DefaultAS);
BridgeObjectPtrTy = llvm::StructType::create(getLLVMContext(), "swift.bridge")
->getPointerTo(DefaultAS);
ObjCClassStructTy = llvm::StructType::create(LLVMContext, "objc_class");
ObjCClassPtrTy = ObjCClassStructTy->getPointerTo(DefaultAS);
llvm::Type *objcClassElts[] = {
ObjCClassPtrTy,
ObjCClassPtrTy,
OpaquePtrTy,
OpaquePtrTy,
IntPtrTy
};
ObjCClassStructTy->setBody(objcClassElts);
ObjCSuperStructTy = llvm::StructType::create(LLVMContext, "objc_super");
ObjCSuperPtrTy = ObjCSuperStructTy->getPointerTo(DefaultAS);
llvm::Type *objcSuperElts[] = {
ObjCPtrTy,
ObjCClassPtrTy
};
ObjCSuperStructTy->setBody(objcSuperElts);
ObjCBlockStructTy = llvm::StructType::create(LLVMContext, "objc_block");
ObjCBlockPtrTy = ObjCBlockStructTy->getPointerTo(DefaultAS);
llvm::Type *objcBlockElts[] = {
ObjCClassPtrTy, // isa
Int32Ty, // flags
Int32Ty, // reserved
FunctionPtrTy, // invoke function pointer
Int8PtrTy, // TODO: block descriptor pointer.
// We will probably need a struct type for that at some
// point too.
};
ObjCBlockStructTy->setBody(objcBlockElts);
auto ErrorStructTy = llvm::StructType::create(LLVMContext, "swift.error");
// ErrorStruct is currently opaque to the compiler.
ErrorPtrTy = ErrorStructTy->getPointerTo(DefaultAS);
llvm::Type *openedErrorTriple[] = {
OpaquePtrTy,
TypeMetadataPtrTy,
WitnessTablePtrTy,
};
OpenedErrorTripleTy = llvm::StructType::get(getLLVMContext(),
openedErrorTriple,
/*packed*/ false);
OpenedErrorTriplePtrTy = OpenedErrorTripleTy->getPointerTo(DefaultAS);
InvariantMetadataID = LLVMContext.getMDKindID("invariant.load");
InvariantNode = llvm::MDNode::get(LLVMContext, {});
DereferenceableID = LLVMContext.getMDKindID("dereferenceable");
C_CC = llvm::CallingConv::C;
// TODO: use "tinycc" on platforms that support it
DefaultCC = SWIFT_LLVM_CC(DefaultCC);
// If it is an interpreter, don't use try to use any
// advanced calling conventions and use instead a
// more conservative C calling convention. This
// makes sure that none of the registers eventually
// used by the dynamic linker are used by generated code.
// TODO: Check that the deployment target supports the new
// calling convention. Older versions of the runtime library
// may not contain the entries using the new calling convention.
// Only use the new calling conventions on platforms that support it.
auto Arch = Triple.getArch();
(void)Arch;
if (SWIFT_RT_USE_RegisterPreservingCC &&
Arch == llvm::Triple::ArchType::aarch64)
RegisterPreservingCC = SWIFT_LLVM_CC(RegisterPreservingCC);
else
RegisterPreservingCC = DefaultCC;
SwiftCC = SWIFT_LLVM_CC(SwiftCC);
UseSwiftCC = (SwiftCC == llvm::CallingConv::Swift);
if (IRGen.Opts.DebugInfoKind > IRGenDebugInfoKind::None)
DebugInfo = IRGenDebugInfo::createIRGenDebugInfo(IRGen.Opts, *CI, *this,
Module, SF);
initClangTypeConverter();
if (ClangASTContext) {
auto atomicBoolTy = ClangASTContext->getAtomicType(ClangASTContext->BoolTy);
AtomicBoolSize = Size(ClangASTContext->getTypeSize(atomicBoolTy));
AtomicBoolAlign = Alignment(ClangASTContext->getTypeSize(atomicBoolTy));
}
IsSwiftErrorInRegister =
clang::CodeGen::swiftcall::isSwiftErrorLoweredInRegister(
ClangCodeGen->CGM());
}