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120 lines
4.9 KiB
C++
120 lines
4.9 KiB
C++
//===--- GenClass.h - Swift IR generation for classes -----------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file provides the private interface to the class-emission code.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_GENCLASS_H
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#define SWIFT_IRGEN_GENCLASS_H
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#include "llvm/ADT/SmallVector.h"
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namespace llvm {
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class Constant;
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class Value;
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class Function;
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}
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namespace swift {
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class CanType;
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class ClassDecl;
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class ExtensionDecl;
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class ProtocolDecl;
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class SILType;
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class Type;
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class VarDecl;
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namespace irgen {
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class HeapLayout;
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class IRGenFunction;
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class IRGenModule;
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class OwnedAddress;
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class Size;
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enum class ReferenceCounting : unsigned char;
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enum class IsaEncoding : unsigned char;
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enum class ClassDeallocationKind : unsigned char;
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OwnedAddress projectPhysicalClassMemberAddress(IRGenFunction &IGF,
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llvm::Value *base,
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SILType baseType,
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SILType fieldType,
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VarDecl *field);
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std::tuple<llvm::Constant * /*classData*/,
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llvm::Constant * /*metaclassData*/,
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Size>
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emitClassPrivateDataFields(IRGenModule &IGM, ClassDecl *cls);
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llvm::Constant *emitClassPrivateData(IRGenModule &IGM, ClassDecl *theClass);
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void emitGenericClassPrivateDataTemplate(IRGenModule &IGM,
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ClassDecl *theClass,
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llvm::SmallVectorImpl<llvm::Constant*> &fields,
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Size &metaclassOffset,
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Size &classRODataOffset,
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Size &metaclassRODataOffset,
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Size &totalSize);
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llvm::Constant *emitCategoryData(IRGenModule &IGM, ExtensionDecl *ext);
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llvm::Constant *emitObjCProtocolData(IRGenModule &IGM, ProtocolDecl *ext);
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/// Emit an allocation of a class.
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/// The \p StackAllocSize is an in- and out-parameter. The passed value
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/// specifies the maximum object size for stack allocation. A negative value
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/// means that no stack allocation is possible.
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/// The returned \p StackAllocSize value is the actual size if the object is
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/// allocated on the stack or -1, if the object is allocated on the heap.
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llvm::Value *emitClassAllocation(IRGenFunction &IGF, SILType selfType,
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bool objc, int &StackAllocSize);
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/// Emit an allocation of a class using a metadata value.
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llvm::Value *emitClassAllocationDynamic(IRGenFunction &IGF,
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llvm::Value *metadata,
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SILType selfType,
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bool objc);
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/// Emit class deallocation.
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void emitClassDeallocation(IRGenFunction &IGF, SILType selfType,
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llvm::Value *selfValue);
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/// Emit class deallocation.
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void emitPartialClassDeallocation(IRGenFunction &IGF,
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SILType selfType,
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llvm::Value *selfValue,
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llvm::Value *metadataValue);
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/// Emit the constant fragile instance size of the class, or null if the class
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/// does not have fixed layout. For resilient classes this does not
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/// correspond to the runtime alignment of instances of the class.
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llvm::Constant *tryEmitClassConstantFragileInstanceSize(IRGenModule &IGM,
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ClassDecl *theClass);
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/// Emit the constant fragile instance alignment mask of the class, or null if
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/// the class does not have fixed layout. For resilient classes this does not
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/// correspond to the runtime alignment of instances of the class.
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llvm::Constant *tryEmitClassConstantFragileInstanceAlignMask(IRGenModule &IGM,
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ClassDecl *theClass);
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/// What reference counting mechanism does a class use?
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ReferenceCounting getReferenceCountingForClass(IRGenModule &IGM,
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ClassDecl *theClass);
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/// What isa-encoding mechanism does a type use?
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IsaEncoding getIsaEncodingForType(IRGenModule &IGM, CanType type);
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ClassDecl *getRootClassForMetaclass(IRGenModule &IGM, ClassDecl *theClass);
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bool getClassHasMetadataPattern(IRGenModule &IGM, ClassDecl *theClass);
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} // end namespace irgen
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} // end namespace swift
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#endif
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