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Make super message lookups cacheable (GNUstep Runtime) 

llvm-svn: 102837
This commit is contained in:
David Chisnall 2010-05-01 12:37:16 +00:00
parent 319d71f44f
commit ea529a43d4
1 changed files with 34 additions and 14 deletions
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48
clang/lib/CodeGen/CGObjCGNU.cpp
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@ -456,12 +456,15 @@ CGObjCGNU::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
return RValue::get(0);
}
}
llvm::Value *cmd = GetSelector(CGF.Builder, Sel);
CGBuilderTy &Builder = CGF.Builder;
llvm::Value *cmd = GetSelector(Builder, Sel);
CallArgList ActualArgs;
ActualArgs.push_back(
std::make_pair(RValue::get(CGF.Builder.CreateBitCast(Receiver, IdTy)),
std::make_pair(RValue::get(Builder.CreateBitCast(Receiver, IdTy)),
ASTIdTy));
ActualArgs.push_back(std::make_pair(RValue::get(cmd),
CGF.getContext().getObjCSelType()));
@ -485,7 +488,7 @@ CGObjCGNU::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get(
IdTy, Params, true), "objc_get_class");
}
ReceiverClass = CGF.Builder.CreateCall(classLookupFunction,
ReceiverClass = Builder.CreateCall(classLookupFunction,
MakeConstantString(Class->getNameAsString()));
} else {
// Set up global aliases for the metaclass or class pointer if they do not
@ -510,34 +513,51 @@ CGObjCGNU::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
}
}
// Cast the pointer to a simplified version of the class structure
ReceiverClass = CGF.Builder.CreateBitCast(ReceiverClass,
ReceiverClass = Builder.CreateBitCast(ReceiverClass,
llvm::PointerType::getUnqual(
llvm::StructType::get(VMContext, IdTy, IdTy, NULL)));
// Get the superclass pointer
ReceiverClass = CGF.Builder.CreateStructGEP(ReceiverClass, 1);
ReceiverClass = Builder.CreateStructGEP(ReceiverClass, 1);
// Load the superclass pointer
ReceiverClass = CGF.Builder.CreateLoad(ReceiverClass);
ReceiverClass = Builder.CreateLoad(ReceiverClass);
// Construct the structure used to look up the IMP
llvm::StructType *ObjCSuperTy = llvm::StructType::get(VMContext,
Receiver->getType(), IdTy, NULL);
llvm::Value *ObjCSuper = CGF.Builder.CreateAlloca(ObjCSuperTy);
llvm::Value *ObjCSuper = Builder.CreateAlloca(ObjCSuperTy);
CGF.Builder.CreateStore(Receiver, CGF.Builder.CreateStructGEP(ObjCSuper, 0));
CGF.Builder.CreateStore(ReceiverClass,
CGF.Builder.CreateStructGEP(ObjCSuper, 1));
Builder.CreateStore(Receiver, Builder.CreateStructGEP(ObjCSuper, 0));
Builder.CreateStore(ReceiverClass, Builder.CreateStructGEP(ObjCSuper, 1));
// Get the IMP
std::vector<const llvm::Type*> Params;
Params.push_back(llvm::PointerType::getUnqual(ObjCSuperTy));
Params.push_back(SelectorTy);
llvm::Value *lookupArgs[] = {ObjCSuper, cmd};
llvm::Value *imp;
if (CGM.getContext().getLangOptions().ObjCNonFragileABI) {
// The lookup function returns a slot, which can be safely cached.
llvm::Type *SlotTy = llvm::StructType::get(VMContext, PtrTy, PtrTy, PtrTy,
IntTy, llvm::PointerType::getUnqual(impType), NULL);
llvm::Constant *lookupFunction =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(
llvm::PointerType::getUnqual(SlotTy), Params, true),
"objc_slot_lookup_super");
llvm::CallInst *slot = Builder.CreateCall(lookupFunction, lookupArgs,
lookupArgs+2);
slot->setOnlyReadsMemory();
imp = Builder.CreateLoad(Builder.CreateStructGEP(slot, 4));
} else {
llvm::Constant *lookupFunction =
CGM.CreateRuntimeFunction(llvm::FunctionType::get(
llvm::PointerType::getUnqual(impType), Params, true),
"objc_msg_lookup_super");
llvm::Value *lookupArgs[] = {ObjCSuper, cmd};
llvm::Value *imp = CGF.Builder.CreateCall(lookupFunction, lookupArgs,
lookupArgs+2);
imp = Builder.CreateCall(lookupFunction, lookupArgs, lookupArgs+2);
}
llvm::Value *impMD[] = {
llvm::MDString::get(VMContext, Sel.getAsString()),