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NeXT: Implement super message sends.

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llvm-svn: 55225
This commit is contained in:
Daniel Dunbar
2008-08-23 04:28:29 +00:00
parent f97ab6df07
commit f6397fed10
1 changed files with 65 additions and 6 deletions
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71
clang/lib/CodeGen/CGObjCMac.cpp
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@@ -40,7 +40,7 @@ private:
const llvm::StructType *CFStringType;
llvm::Constant *CFConstantStringClassReference;
llvm::Function *MessageSendFn;
llvm::Function *MessageSendFn, *MessageSendSuperFn;
public:
const llvm::Type *ShortTy, *IntTy, *LongTy;
@@ -54,6 +54,9 @@ public:
/// (typeof(Protocol))
const llvm::Type *ExternalProtocolPtrTy;
/// SuperTy - LLVM type for struct objc_super.
const llvm::StructType *SuperTy;
/// SymtabTy - LLVM type for struct objc_symtab.
const llvm::StructType *SymtabTy;
/// SymtabPtrTy - LLVM type for struct objc_symtab *.
@@ -126,6 +129,7 @@ public:
llvm::Constant *getCFConstantStringClassReference();
const llvm::StructType *getCFStringType();
llvm::Function *getMessageSendFn();
llvm::Function *getMessageSendSuperFn();
};
class CGObjCMac : public CodeGen::CGObjCRuntime {
@@ -421,8 +425,39 @@ CGObjCMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
const ObjCMessageExpr *E,
const ObjCInterfaceDecl *SuperClass,
llvm::Value *Receiver) {
assert(0 && "Cannot generate message send to super for Mac runtime.");
return CodeGen::RValue::get(0);
// FIXME: This should be cached, not looked up every time. Meh. We
// should just make sure the optimizer hits it.
llvm::Value *ReceiverClass = EmitClassRef(CGF.Builder, SuperClass);
// Create and init a super structure; this is a (receiver, class)
// pair we will pass to objc_msgSendSuper.
llvm::Value *ObjCSuper =
CGF.Builder.CreateAlloca(ObjCTypes.SuperTy, 0, "objc_super");
llvm::Value *ReceiverAsObject =
CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
CGF.Builder.CreateStore(ReceiverAsObject,
CGF.Builder.CreateStructGEP(ObjCSuper, 0));
CGF.Builder.CreateStore(ReceiverClass,
CGF.Builder.CreateStructGEP(ObjCSuper, 1));
const llvm::Type *ReturnTy = CGM.getTypes().ConvertType(E->getType());
llvm::Function *F = ObjCTypes.getMessageSendSuperFn();
llvm::Value *Args[2];
Args[0] = ObjCSuper;
Args[1] = EmitSelector(CGF.Builder, E->getSelector());
std::vector<const llvm::Type*> Params(2);
Params[0] = llvm::PointerType::getUnqual(ObjCTypes.SuperTy);
Params[1] = ObjCTypes.SelectorPtrTy;
llvm::FunctionType *CallFTy = llvm::FunctionType::get(ReturnTy,
Params,
true);
llvm::Type *PCallFTy = llvm::PointerType::getUnqual(CallFTy);
llvm::Constant *C = llvm::ConstantExpr::getBitCast(F, PCallFTy);
return CGF.EmitCallExprExt(C, E->getType(),
E->arg_begin(),
E->arg_end(),
Args, 2);
}
/// Generate code for a message send expression.
@@ -435,9 +470,9 @@ CodeGen::RValue CGObjCMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
Args[0] = CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy, "tmp");
Args[1] = EmitSelector(CGF.Builder, E->getSelector());
std::vector<const llvm::Type*> Params;
Params.push_back(ObjCTypes.ObjectPtrTy);
Params.push_back(ObjCTypes.SelectorPtrTy);
std::vector<const llvm::Type*> Params(2);
Params[0] = ObjCTypes.ObjectPtrTy;
Params[1] = ObjCTypes.SelectorPtrTy;
llvm::FunctionType *CallFTy = llvm::FunctionType::get(ReturnTy,
Params,
true);
@@ -1661,6 +1696,13 @@ ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
NULL);
CGM.getModule().addTypeName("struct._objc_category", CategoryTy);
SuperTy =
llvm::StructType::get(ObjectPtrTy,
ClassPtrTy,
NULL);
CGM.getModule().addTypeName("struct._objc_super",
SuperTy);
// Global metadata structures
SymtabTy = llvm::StructType::get(LongTy,
@@ -1731,6 +1773,23 @@ llvm::Function *ObjCTypesHelper::getMessageSendFn() {
return MessageSendFn;
}
llvm::Function *ObjCTypesHelper::getMessageSendSuperFn() {
if (!MessageSendSuperFn) {
std::vector<const llvm::Type*> Params;
Params.push_back(llvm::PointerType::getUnqual(SuperTy));
Params.push_back(SelectorPtrTy);
MessageSendSuperFn =
llvm::Function::Create(llvm::FunctionType::get(ObjectPtrTy,
Params,
true),
llvm::Function::ExternalLinkage,
"objc_msgSendSuper",
&CGM.getModule());
}
return MessageSendSuperFn;
}
/* *** */
CodeGen::CGObjCRuntime *