mirror of
https://github.com/llvm/llvm-project.git
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351762cda2
- BlockDeclRefExprs always store VarDecls
- BDREs no longer store copy expressions
- BlockDecls now store a list of captured variables, information about
how they're captured, and a copy expression if necessary
With that in hand, change IR generation to use the captures data in
blocks instead of walking the block independently.
Additionally, optimize block layout by emitting fields in descending
alignment order, with a heuristic for filling in words when alignment
of the end of the block header is insufficient for the most aligned
field.
llvm-svn: 125005
237 lines
9.7 KiB
C++
237 lines
9.7 KiB
C++
//===----- CGObjCRuntime.h - Interface to ObjC Runtimes ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This provides an abstract class for Objective-C code generation. Concrete
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// subclasses of this implement code generation for specific Objective-C
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// runtime libraries.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CLANG_CODEGEN_OBCJRUNTIME_H
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#define CLANG_CODEGEN_OBCJRUNTIME_H
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#include "clang/Basic/IdentifierTable.h" // Selector
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#include "clang/AST/DeclObjC.h"
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#include <string>
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#include "CGBuilder.h"
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#include "CGCall.h"
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#include "CGValue.h"
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namespace llvm {
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class Constant;
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class Function;
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class Module;
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class StructLayout;
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class StructType;
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class Type;
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class Value;
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}
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namespace clang {
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namespace CodeGen {
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class CodeGenFunction;
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}
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class FieldDecl;
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class ObjCAtTryStmt;
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class ObjCAtThrowStmt;
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class ObjCAtSynchronizedStmt;
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class ObjCContainerDecl;
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class ObjCCategoryImplDecl;
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class ObjCImplementationDecl;
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class ObjCInterfaceDecl;
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class ObjCMessageExpr;
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class ObjCMethodDecl;
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class ObjCProtocolDecl;
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class Selector;
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class ObjCIvarDecl;
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class ObjCStringLiteral;
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class BlockDeclRefExpr;
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namespace CodeGen {
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class CodeGenModule;
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class CGBlockInfo;
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// FIXME: Several methods should be pure virtual but aren't to avoid the
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// partially-implemented subclass breaking.
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/// Implements runtime-specific code generation functions.
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class CGObjCRuntime {
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protected:
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// Utility functions for unified ivar access. These need to
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// eventually be folded into other places (the structure layout
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// code).
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/// Compute an offset to the given ivar, suitable for passing to
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/// EmitValueForIvarAtOffset. Note that the correct handling of
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/// bit-fields is carefully coordinated by these two, use caution!
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///
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/// The latter overload is suitable for computing the offset of a
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/// sythesized ivar.
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uint64_t ComputeIvarBaseOffset(CodeGen::CodeGenModule &CGM,
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const ObjCInterfaceDecl *OID,
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const ObjCIvarDecl *Ivar);
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uint64_t ComputeIvarBaseOffset(CodeGen::CodeGenModule &CGM,
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const ObjCImplementationDecl *OID,
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const ObjCIvarDecl *Ivar);
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LValue EmitValueForIvarAtOffset(CodeGen::CodeGenFunction &CGF,
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const ObjCInterfaceDecl *OID,
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llvm::Value *BaseValue,
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const ObjCIvarDecl *Ivar,
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unsigned CVRQualifiers,
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llvm::Value *Offset);
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public:
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virtual ~CGObjCRuntime();
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/// Generate the function required to register all Objective-C components in
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/// this compilation unit with the runtime library.
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virtual llvm::Function *ModuleInitFunction() = 0;
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/// Get a selector for the specified name and type values. The
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/// return value should have the LLVM type for pointer-to
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/// ASTContext::getObjCSelType().
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virtual llvm::Value *GetSelector(CGBuilderTy &Builder,
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Selector Sel, bool lval=false) = 0;
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/// Get a typed selector.
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virtual llvm::Value *GetSelector(CGBuilderTy &Builder,
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const ObjCMethodDecl *Method) = 0;
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/// Get the type constant to catch for the given ObjC pointer type.
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/// This is used externally to implement catching ObjC types in C++.
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/// Runtimes which don't support this should add the appropriate
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/// error to Sema.
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virtual llvm::Constant *GetEHType(QualType T) = 0;
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/// Generate a constant string object.
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virtual llvm::Constant *GenerateConstantString(const StringLiteral *) = 0;
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/// Generate a category. A category contains a list of methods (and
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/// accompanying metadata) and a list of protocols.
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virtual void GenerateCategory(const ObjCCategoryImplDecl *OCD) = 0;
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/// Generate a class stucture for this class.
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virtual void GenerateClass(const ObjCImplementationDecl *OID) = 0;
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/// Generate an Objective-C message send operation.
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///
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/// \param Method - The method being called, this may be null if synthesizing
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/// a property setter or getter.
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virtual CodeGen::RValue
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GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
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ReturnValueSlot ReturnSlot,
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QualType ResultType,
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Selector Sel,
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llvm::Value *Receiver,
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const CallArgList &CallArgs,
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const ObjCInterfaceDecl *Class = 0,
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const ObjCMethodDecl *Method = 0) = 0;
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/// Generate an Objective-C message send operation to the super
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/// class initiated in a method for Class and with the given Self
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/// object.
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///
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/// \param Method - The method being called, this may be null if synthesizing
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/// a property setter or getter.
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virtual CodeGen::RValue
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GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
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ReturnValueSlot ReturnSlot,
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QualType ResultType,
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Selector Sel,
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const ObjCInterfaceDecl *Class,
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bool isCategoryImpl,
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llvm::Value *Self,
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bool IsClassMessage,
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const CallArgList &CallArgs,
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const ObjCMethodDecl *Method = 0) = 0;
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/// Emit the code to return the named protocol as an object, as in a
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/// @protocol expression.
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virtual llvm::Value *GenerateProtocolRef(CGBuilderTy &Builder,
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const ObjCProtocolDecl *OPD) = 0;
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/// Generate the named protocol. Protocols contain method metadata but no
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/// implementations.
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virtual void GenerateProtocol(const ObjCProtocolDecl *OPD) = 0;
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/// Generate a function preamble for a method with the specified
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/// types.
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// FIXME: Current this just generates the Function definition, but really this
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// should also be generating the loads of the parameters, as the runtime
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// should have full control over how parameters are passed.
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virtual llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD,
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const ObjCContainerDecl *CD) = 0;
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/// Return the runtime function for getting properties.
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virtual llvm::Constant *GetPropertyGetFunction() = 0;
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/// Return the runtime function for setting properties.
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virtual llvm::Constant *GetPropertySetFunction() = 0;
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// API for atomic copying of qualified aggregates in getter.
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virtual llvm::Constant *GetGetStructFunction() = 0;
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// API for atomic copying of qualified aggregates in setter.
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virtual llvm::Constant *GetSetStructFunction() = 0;
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/// GetClass - Return a reference to the class for the given
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/// interface decl.
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virtual llvm::Value *GetClass(CGBuilderTy &Builder,
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const ObjCInterfaceDecl *OID) = 0;
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/// EnumerationMutationFunction - Return the function that's called by the
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/// compiler when a mutation is detected during foreach iteration.
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virtual llvm::Constant *EnumerationMutationFunction() = 0;
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virtual void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
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const ObjCAtSynchronizedStmt &S) = 0;
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virtual void EmitTryStmt(CodeGen::CodeGenFunction &CGF,
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const ObjCAtTryStmt &S) = 0;
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virtual void EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
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const ObjCAtThrowStmt &S) = 0;
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virtual llvm::Value *EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
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llvm::Value *AddrWeakObj) = 0;
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virtual void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
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llvm::Value *src, llvm::Value *dest) = 0;
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virtual void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
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llvm::Value *src, llvm::Value *dest,
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bool threadlocal=false) = 0;
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virtual void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
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llvm::Value *src, llvm::Value *dest,
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llvm::Value *ivarOffset) = 0;
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virtual void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
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llvm::Value *src, llvm::Value *dest) = 0;
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virtual LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF,
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QualType ObjectTy,
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llvm::Value *BaseValue,
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const ObjCIvarDecl *Ivar,
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unsigned CVRQualifiers) = 0;
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virtual llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
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const ObjCInterfaceDecl *Interface,
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const ObjCIvarDecl *Ivar) = 0;
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virtual void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
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llvm::Value *DestPtr,
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llvm::Value *SrcPtr,
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llvm::Value *Size) = 0;
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virtual llvm::Constant *BuildGCBlockLayout(CodeGen::CodeGenModule &CGM,
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const CodeGen::CGBlockInfo &blockInfo) = 0;
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};
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/// Creates an instance of an Objective-C runtime class.
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//TODO: This should include some way of selecting which runtime to target.
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CGObjCRuntime *CreateGNUObjCRuntime(CodeGenModule &CGM);
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CGObjCRuntime *CreateMacObjCRuntime(CodeGenModule &CGM);
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CGObjCRuntime *CreateMacNonFragileABIObjCRuntime(CodeGenModule &CGM);
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}
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}
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#endif
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