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//===----- CGObjCRuntime.h - Emit LLVM Code from ASTs for a Module --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This provides an abstract class for Objective-C code generation. Concrete
// subclasses of this implement code generation for specific Objective-C
// runtime libraries.
//
//===----------------------------------------------------------------------===//
#ifndef CLANG_CODEGEN_OBCJRUNTIME_H
#define CLANG_CODEGEN_OBCJRUNTIME_H
namespace llvm {
class IRBuilder;
class Constant;
class Type;
class Value;
class Module;
class Function;
}
namespace clang {
namespace CodeGen {
// Implements runtime-specific code generation functions
class CGObjCRuntime {
public:
virtual ~CGObjCRuntime();
/// Generate an Objective-C message send operation
virtual llvm::Value *generateMessageSend(llvm::IRBuilder &Builder,
const llvm::Type *ReturnTy,
llvm::Value *Sender,
llvm::Value *Receiver,
llvm::Value *Selector,
llvm::Value** ArgV,
unsigned ArgC) = 0;
/// Generate the function required to register all Objective-C components in
/// this compilation unit with the runtime library.
virtual llvm::Function *ModuleInitFunction() { return 0; }
/// Generate a function preamble for a method with the specified types
virtual llvm::Function *MethodPreamble(const llvm::Type *ReturnTy,
const llvm::Type *SelfTy,
const llvm::Type **ArgTy,
unsigned ArgC,
bool isVarArg) = 0;
/// If instance variable addresses are determined at runtime then this should
/// return true, otherwise instance variables will be accessed directly from
/// the structure. If this returns true then @defs is invalid for this
/// runtime and a warning should be generated.
virtual bool LateBoundIVars() { return false; }
};
/// Creates an instance of an Objective-C runtime class.
//TODO: This should include some way of selecting which runtime to target.
CGObjCRuntime *CreateObjCRuntime(llvm::Module &M,
const llvm::Type *LLVMIntType,
const llvm::Type *LLVMLongType);
}
}
#endif
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