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objc2's nonfragile abi API for messages sent to 'super'. 

llvm-svn: 63959
This commit is contained in:
Fariborz Jahanian 2009-02-06 20:09:23 +00:00
parent 6b7ecf6819
commit 6b7cd6e5f4
1 changed files with 110 additions and 7 deletions
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117
clang/lib/CodeGen/CGObjCMac.cpp
View File

@ -597,6 +597,8 @@ private:
ObjCNonFragileABITypesHelper ObjCTypes;
llvm::GlobalVariable* ObjCEmptyCacheVar;
llvm::GlobalVariable* ObjCEmptyVtableVar;
/// MetaClassReferences - uniqued meta class references.
llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> MetaClassReferences;
/// FinishNonFragileABIModule - Write out global data structures at the end of
/// processing a translation unit.
@ -660,7 +662,14 @@ private:
/// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
/// for the given class.
llvm::Value *EmitClassRef(CGBuilderTy &Builder,
const ObjCInterfaceDecl *ID);
const ObjCInterfaceDecl *ID,
bool IsSuper = false);
/// EmitMetaClassRef - Return a Value * of the address of _class_t
/// meta-data
llvm::Value *EmitMetaClassRef(CGBuilderTy &Builder,
const ObjCInterfaceDecl *ID);
public:
CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm);
@ -681,7 +690,7 @@ public:
const ObjCInterfaceDecl *Class,
llvm::Value *Receiver,
bool IsClassMessage,
const CallArgList &CallArgs){ return RValue::get(0);}
const CallArgList &CallArgs);
virtual llvm::Value *GetClass(CGBuilderTy &Builder,
const ObjCInterfaceDecl *ID);
@ -4298,8 +4307,9 @@ CodeGen::RValue CGObjCNonFragileABIMac::EmitMessageSend(
// FIXME. Even though IsSuper is passes. This function doese not
// handle calls to 'super' receivers.
CodeGenTypes &Types = CGM.getTypes();
llvm::Value *Arg0 =
CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy, "tmp");
llvm::Value *Arg0 = Receiver;
if (!IsSuper)
Arg0 = CGF.Builder.CreateBitCast(Arg0, ObjCTypes.ObjectPtrTy, "tmp");
// Find the message function name.
// FIXME. This is too much work to get the ABI-specific result type
@ -4319,6 +4329,11 @@ CodeGen::RValue CGObjCNonFragileABIMac::EmitMessageSend(
}
else
#endif
if (IsSuper) {
Fn = ObjCTypes.MessageSendSuper2StretFixupFn;
Name += "objc_msgSendSuper2_stret_fixup";
}
else
{
Fn = ObjCTypes.MessageSendStretFixupFn;
Name += "objc_msgSend_stret_fixup";
@ -4339,6 +4354,11 @@ CodeGen::RValue CGObjCNonFragileABIMac::EmitMessageSend(
}
else
#endif
if (IsSuper) {
Fn = ObjCTypes.MessageSendSuper2FixupFn;
Name += "objc_msgSendSuper2_fixup";
}
else
{
Fn = ObjCTypes.MessageSendFixupFn;
Name += "objc_msgSend_fixup";
@ -4403,7 +4423,8 @@ CodeGen::RValue CGObjCNonFragileABIMac::GenerateMessageSend(
}
llvm::Value *CGObjCNonFragileABIMac::EmitClassRef(CGBuilderTy &Builder,
const ObjCInterfaceDecl *ID) {
const ObjCInterfaceDecl *ID,
bool IsSuper) {
llvm::GlobalVariable *&Entry = ClassReferences[ID->getIdentifier()];
@ -4423,19 +4444,62 @@ llvm::Value *CGObjCNonFragileABIMac::EmitClassRef(CGBuilderTy &Builder,
Entry =
new llvm::GlobalVariable(ObjCTypes.ClassnfABIPtrTy, false,
llvm::GlobalValue::InternalLinkage,
ClassGV, "\01L_OBJC_CLASSLIST_REFERENCES_$_",
ClassGV,
IsSuper ? "\01L_OBJC_CLASSLIST_SUP_REFS_$_"
: "\01L_OBJC_CLASSLIST_REFERENCES_$_",
&CGM.getModule());
Entry->setAlignment(
CGM.getTargetData().getPrefTypeAlignment(
ObjCTypes.ClassnfABIPtrTy));
Entry->setSection("__OBJC,__objc_classrefs,regular,no_dead_strip");
if (IsSuper)
Entry->setSection("__OBJC,__objc_superrefs,regular,no_dead_strip");
else
Entry->setSection("__OBJC,__objc_classrefs,regular,no_dead_strip");
UsedGlobals.push_back(Entry);
}
return Builder.CreateLoad(Entry, false, "tmp");
}
/// EmitMetaClassRef - Return a Value * of the address of _class_t
/// meta-data
///
llvm::Value *CGObjCNonFragileABIMac::EmitMetaClassRef(CGBuilderTy &Builder,
const ObjCInterfaceDecl *ID) {
llvm::GlobalVariable * &Entry = MetaClassReferences[ID->getIdentifier()];
if (Entry)
return Builder.CreateLoad(Entry, false, "tmp");
std::string MetaClassName("\01_OBJC_METACLASS_$_" + ID->getNameAsString());
llvm::GlobalVariable *MetaClassGV =
CGM.getModule().getGlobalVariable(MetaClassName);
if (!MetaClassGV) {
MetaClassGV =
new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false,
llvm::GlobalValue::ExternalLinkage,
0,
MetaClassName,
&CGM.getModule());
UsedGlobals.push_back(MetaClassGV);
}
Entry =
new llvm::GlobalVariable(ObjCTypes.ClassnfABIPtrTy, false,
llvm::GlobalValue::InternalLinkage,
MetaClassGV,
"\01L_OBJC_CLASSLIST_SUP_REFS_$_",
&CGM.getModule());
Entry->setAlignment(
CGM.getTargetData().getPrefTypeAlignment(
ObjCTypes.ClassnfABIPtrTy));
Entry->setSection("__OBJC,__objc_superrefs,regular,no_dead_strip");
UsedGlobals.push_back(Entry);
return Builder.CreateLoad(Entry, false, "tmp");
}
/// GetClass - Return a reference to the class for the given interface
/// decl.
llvm::Value *CGObjCNonFragileABIMac::GetClass(CGBuilderTy &Builder,
@ -4443,6 +4507,45 @@ llvm::Value *CGObjCNonFragileABIMac::GetClass(CGBuilderTy &Builder,
return EmitClassRef(Builder, ID);
}
/// 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.
CodeGen::RValue
CGObjCNonFragileABIMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
QualType ResultType,
Selector Sel,
const ObjCInterfaceDecl *Class,
llvm::Value *Receiver,
bool IsClassMessage,
const CodeGen::CallArgList &CallArgs) {
// ...
// 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));
// If this is a class message the metaclass is passed as the target.
llvm::Value *Target =
IsClassMessage ? EmitMetaClassRef(CGF.Builder, Class)
: EmitClassRef(CGF.Builder, Class, true);
// FIXME: We shouldn't need to do this cast, rectify the ASTContext
// and ObjCTypes types.
const llvm::Type *ClassTy =
CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
Target = CGF.Builder.CreateBitCast(Target, ClassTy);
CGF.Builder.CreateStore(Target,
CGF.Builder.CreateStructGEP(ObjCSuper, 1));
return EmitMessageSend(CGF, ResultType, Sel,
ObjCSuper, ObjCTypes.SuperPtrCTy,
true, CallArgs);
}
/* *** */
CodeGen::CGObjCRuntime *