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//===------- CGObjCMac.cpp - Interface to Apple Objective-C Runtime -------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This provides Objective-C code generation targetting the Apple runtime.
//
//===----------------------------------------------------------------------===//
#include "CGObjCRuntime.h"
#include "CodeGenModule.h"
#include "clang/AST/Decl.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/Support/IRBuilder.h"
using namespace clang;
namespace {
class CGObjCMac : public CodeGen::CGObjCRuntime {
private:
CodeGen::CodeGenModule &CGM;
/// UsedGlobals - list of globals to pack into the llvm.used metadata
/// to prevent them from being clobbered.
std::vector<llvm::GlobalValue*> UsedGlobals;
/// EmitImageInfo - Emit the image info marker used to encode some module
/// level information.
void EmitImageInfo();
/// FinishModule - Write out global data structures at the end of
/// processing a translation unit.
void FinishModule();
public:
CGObjCMac(CodeGen::CodeGenModule &cgm);
virtual llvm::Constant *GenerateConstantString(const char *String,
const size_t length);
virtual llvm::Value *GenerateMessageSend(llvm::IRBuilder<> &Builder,
const llvm::Type *ReturnTy,
llvm::Value *Sender,
llvm::Value *Receiver,
Selector Sel,
llvm::Value** ArgV,
unsigned ArgC);
virtual llvm::Value *GenerateMessageSendSuper(llvm::IRBuilder<> &Builder,
const llvm::Type *ReturnTy,
llvm::Value *Sender,
const char *SuperClassName,
llvm::Value *Receiver,
Selector Sel,
llvm::Value** ArgV,
unsigned ArgC);
virtual llvm::Value *LookupClass(llvm::IRBuilder<> &Builder,
llvm::Value *ClassName);
virtual llvm::Value *GetSelector(llvm::IRBuilder<> &Builder, Selector Sel);
virtual llvm::Function *MethodPreamble(const std::string &ClassName,
const std::string &CategoryName,
const std::string &MethodName,
const llvm::Type *ReturnTy,
const llvm::Type *SelfTy,
const llvm::Type **ArgTy,
unsigned ArgC,
bool isClassMethod,
bool isVarArg);
virtual void GenerateCategory(const char *ClassName, const char *CategoryName,
const llvm::SmallVectorImpl<Selector> &InstanceMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
const llvm::SmallVectorImpl<Selector> &ClassMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes,
const llvm::SmallVectorImpl<std::string> &Protocols);
virtual void GenerateClass(
const char *ClassName,
const char *SuperClassName,
const int instanceSize,
const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames,
const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes,
const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets,
const llvm::SmallVectorImpl<Selector> &InstanceMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
const llvm::SmallVectorImpl<Selector> &ClassMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes,
const llvm::SmallVectorImpl<std::string> &Protocols);
virtual llvm::Value *GenerateProtocolRef(llvm::IRBuilder<> &Builder,
const char *ProtocolName);
virtual void GenerateProtocol(const char *ProtocolName,
const llvm::SmallVectorImpl<std::string> &Protocols,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes);
virtual llvm::Function *ModuleInitFunction();
};
} // end anonymous namespace
CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) : CGM(cgm) {
EmitImageInfo();
}
// This has to perform the lookup every time, since posing and related
// techniques can modify the name -> class mapping.
llvm::Value *CGObjCMac::LookupClass(llvm::IRBuilder<> &Builder,
llvm::Value *ClassName) {
assert(0 && "Cannot lookup classes on Mac runtime.");
return 0;
}
/// GetSelector - Return the pointer to the unique'd string for this selector.
llvm::Value *CGObjCMac::GetSelector(llvm::IRBuilder<> &Builder, Selector Sel) {
assert(0 && "Cannot get selector on Mac runtime.");
return 0;
}
/// Generate an NSConstantString object.
llvm::Constant *CGObjCMac::GenerateConstantString(const char *String,
const size_t length) {
assert(0 && "Cannot generate constant string for Mac runtime.");
return 0;
}
/// Generates a message send where the super is the receiver. This is
/// a message send to self with special delivery semantics indicating
/// which class's method should be called.
llvm::Value *CGObjCMac::GenerateMessageSendSuper(llvm::IRBuilder<> &Builder,
const llvm::Type *ReturnTy,
llvm::Value *Sender,
const char *SuperClassName,
llvm::Value *Receiver,
Selector Sel,
llvm::Value** ArgV,
unsigned ArgC) {
assert(0 && "Cannot generate message send to super for Mac runtime.");
return 0;
}
/// Generate code for a message send expression.
llvm::Value *CGObjCMac::GenerateMessageSend(llvm::IRBuilder<> &Builder,
const llvm::Type *ReturnTy,
llvm::Value *Sender,
llvm::Value *Receiver,
Selector Sel,
llvm::Value** ArgV,
unsigned ArgC) {
assert(0 && "Cannot generate message send for Mac runtime.");
return 0;
}
llvm::Value *CGObjCMac::GenerateProtocolRef(llvm::IRBuilder<> &Builder,
const char *ProtocolName) {
assert(0 && "Cannot get protocol reference on Mac runtime.");
return 0;
}
void CGObjCMac::GenerateProtocol(const char *ProtocolName,
const llvm::SmallVectorImpl<std::string> &Protocols,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodNames,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodNames,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes) {
assert(0 && "Cannot generate protocol for Mac runtime.");
}
void CGObjCMac::GenerateCategory(
const char *ClassName,
const char *CategoryName,
const llvm::SmallVectorImpl<Selector> &InstanceMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
const llvm::SmallVectorImpl<Selector> &ClassMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes,
const llvm::SmallVectorImpl<std::string> &Protocols) {
assert(0 && "Cannot generate category for Mac runtime.");
}
void CGObjCMac::GenerateClass(
const char *ClassName,
const char *SuperClassName,
const int instanceSize,
const llvm::SmallVectorImpl<llvm::Constant *> &IvarNames,
const llvm::SmallVectorImpl<llvm::Constant *> &IvarTypes,
const llvm::SmallVectorImpl<llvm::Constant *> &IvarOffsets,
const llvm::SmallVectorImpl<Selector> &InstanceMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &InstanceMethodTypes,
const llvm::SmallVectorImpl<Selector> &ClassMethodSels,
const llvm::SmallVectorImpl<llvm::Constant *> &ClassMethodTypes,
const llvm::SmallVectorImpl<std::string> &Protocols) {
assert(0 && "Cannot generate class for Mac runtime.");
}
llvm::Function *CGObjCMac::ModuleInitFunction() {
// Abuse this interface function as a place to finalize.
FinishModule();
return NULL;
}
llvm::Function *CGObjCMac::MethodPreamble(
const std::string &ClassName,
const std::string &CategoryName,
const std::string &MethodName,
const llvm::Type *ReturnTy,
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