forked from OSchip/llvm-project
127 lines
6.0 KiB
C++
127 lines
6.0 KiB
C++
//===----- CGObjCRuntime.h - Emit LLVM Code from ASTs for a Module --------===//
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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 "llvm/ADT/SmallVector.h"
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#include <string>
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namespace llvm {
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class IRBuilder;
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class Constant;
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class Type;
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class Value;
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class Module;
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class Function;
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}
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namespace clang {
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class Selector;
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namespace CodeGen {
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class CodeGenModule;
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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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public:
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virtual ~CGObjCRuntime();
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/// Generate an Objective-C message send operation
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virtual llvm::Value *GenerateMessageSend(llvm::IRBuilder &Builder,
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const llvm::Type *ReturnTy,
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llvm::Value *Sender,
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llvm::Value *Receiver,
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Selector Sel,
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llvm::Value** ArgV,
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unsigned ArgC) =0;
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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
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virtual llvm::Value *GetSelector(llvm::IRBuilder &Builder, Selector Sel) = 0;
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/// Generate a constant string object
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virtual llvm::Constant *GenerateConstantString(const char *String,
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const size_t Length) = 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 char *ClassName, const char *CategoryName,
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const llvm::SmallVectorImpl<Selector> &InstanceMethodSels,
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const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
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const llvm::SmallVectorImpl<Selector> &ClassMethodSels,
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const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes,
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const llvm::SmallVectorImpl<std::string> &Protocols) =0;
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/// Generate a class stucture for this class.
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virtual void GenerateClass(
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const char *ClassName,
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const char *SuperClassName,
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const int instanceSize,
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const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames,
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const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes,
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const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets,
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const llvm::SmallVectorImpl<Selector> &InstanceMethodSels,
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const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
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const llvm::SmallVectorImpl<Selector> &ClassMethodSels,
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const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes,
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const llvm::SmallVectorImpl<std::string> &Protocols) =0;
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/// Generate a reference to the named protocol.
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virtual llvm::Value *GenerateProtocolRef(llvm::IRBuilder &Builder, const char
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*ProtocolName) =0;
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virtual llvm::Value *GenerateMessageSendSuper(llvm::IRBuilder &Builder,
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const llvm::Type *ReturnTy,
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llvm::Value *Sender,
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const char *SuperClassName,
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llvm::Value *Receiver,
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Selector Sel,
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llvm::Value** ArgV,
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unsigned ArgC) = 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 char *ProtocolName,
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const llvm::SmallVectorImpl<std::string> &Protocols,
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const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames,
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const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
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const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames,
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const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes) =0;
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/// Generate a function preamble for a method with the specified types
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virtual llvm::Function *MethodPreamble(
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const std::string &ClassName,
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const std::string &CategoryName,
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const std::string &MethodName,
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const llvm::Type *ReturnTy,
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const llvm::Type *SelfTy,
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const llvm::Type **ArgTy,
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unsigned ArgC,
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bool isClassMethod,
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bool isVarArg) = 0;
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/// Look up the class for the specified name
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virtual llvm::Value *LookupClass(llvm::IRBuilder &Builder, llvm::Value
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*ClassName) =0;
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/// If instance variable addresses are determined at runtime then this should
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/// return true, otherwise instance variables will be accessed directly from
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/// the structure. If this returns true then @defs is invalid for this
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/// runtime and a warning should be generated.
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virtual bool LateBoundIVars() { return false; }
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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 *CreateObjCRuntime(CodeGenModule &CGM);
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}
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}
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#endif
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