832 lines
34 KiB
C++
832 lines
34 KiB
C++
//===---- CGBuiltin.cpp - Emit LLVM Code for builtins ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This contains code to emit Objective-C code as LLVM code.
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//
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//===----------------------------------------------------------------------===//
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#include "CGObjCRuntime.h"
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#include "CodeGenFunction.h"
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#include "CodeGenModule.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/AST/StmtObjC.h"
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#include "clang/Basic/Diagnostic.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/Target/TargetData.h"
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using namespace clang;
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using namespace CodeGen;
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/// Emits an instance of NSConstantString representing the object.
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llvm::Value *CodeGenFunction::EmitObjCStringLiteral(const ObjCStringLiteral *E)
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{
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llvm::Constant *C =
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CGM.getObjCRuntime().GenerateConstantString(E->getString());
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// FIXME: This bitcast should just be made an invariant on the Runtime.
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return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType()));
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}
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/// Emit a selector.
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llvm::Value *CodeGenFunction::EmitObjCSelectorExpr(const ObjCSelectorExpr *E) {
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// Untyped selector.
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// Note that this implementation allows for non-constant strings to be passed
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// as arguments to @selector(). Currently, the only thing preventing this
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// behaviour is the type checking in the front end.
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return CGM.getObjCRuntime().GetSelector(Builder, E->getSelector());
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}
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llvm::Value *CodeGenFunction::EmitObjCProtocolExpr(const ObjCProtocolExpr *E) {
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// FIXME: This should pass the Decl not the name.
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return CGM.getObjCRuntime().GenerateProtocolRef(Builder, E->getProtocol());
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}
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RValue CodeGenFunction::EmitObjCMessageExpr(const ObjCMessageExpr *E,
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ReturnValueSlot Return) {
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// Only the lookup mechanism and first two arguments of the method
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// implementation vary between runtimes. We can get the receiver and
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// arguments in generic code.
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CGObjCRuntime &Runtime = CGM.getObjCRuntime();
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bool isSuperMessage = false;
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bool isClassMessage = false;
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ObjCInterfaceDecl *OID = 0;
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// Find the receiver
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llvm::Value *Receiver = 0;
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switch (E->getReceiverKind()) {
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case ObjCMessageExpr::Instance:
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Receiver = EmitScalarExpr(E->getInstanceReceiver());
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break;
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case ObjCMessageExpr::Class: {
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const ObjCObjectType *ObjTy
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= E->getClassReceiver()->getAs<ObjCObjectType>();
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assert(ObjTy && "Invalid Objective-C class message send");
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OID = ObjTy->getInterface();
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assert(OID && "Invalid Objective-C class message send");
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Receiver = Runtime.GetClass(Builder, OID);
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isClassMessage = true;
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break;
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}
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case ObjCMessageExpr::SuperInstance:
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Receiver = LoadObjCSelf();
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isSuperMessage = true;
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break;
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case ObjCMessageExpr::SuperClass:
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Receiver = LoadObjCSelf();
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isSuperMessage = true;
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isClassMessage = true;
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break;
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}
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CallArgList Args;
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EmitCallArgs(Args, E->getMethodDecl(), E->arg_begin(), E->arg_end());
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QualType ResultType =
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E->getMethodDecl() ? E->getMethodDecl()->getResultType() : E->getType();
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if (isSuperMessage) {
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// super is only valid in an Objective-C method
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const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
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bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext());
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return Runtime.GenerateMessageSendSuper(*this, Return, ResultType,
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E->getSelector(),
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OMD->getClassInterface(),
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isCategoryImpl,
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Receiver,
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isClassMessage,
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Args,
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E->getMethodDecl());
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}
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return Runtime.GenerateMessageSend(*this, Return, ResultType,
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E->getSelector(),
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Receiver, Args, OID,
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E->getMethodDecl());
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}
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/// StartObjCMethod - Begin emission of an ObjCMethod. This generates
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/// the LLVM function and sets the other context used by
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/// CodeGenFunction.
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void CodeGenFunction::StartObjCMethod(const ObjCMethodDecl *OMD,
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const ObjCContainerDecl *CD) {
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FunctionArgList Args;
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// Check if we should generate debug info for this method.
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if (CGM.getDebugInfo() && !OMD->hasAttr<NoDebugAttr>())
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DebugInfo = CGM.getDebugInfo();
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llvm::Function *Fn = CGM.getObjCRuntime().GenerateMethod(OMD, CD);
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const CGFunctionInfo &FI = CGM.getTypes().getFunctionInfo(OMD);
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CGM.SetInternalFunctionAttributes(OMD, Fn, FI);
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Args.push_back(std::make_pair(OMD->getSelfDecl(),
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OMD->getSelfDecl()->getType()));
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Args.push_back(std::make_pair(OMD->getCmdDecl(),
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OMD->getCmdDecl()->getType()));
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for (ObjCMethodDecl::param_iterator PI = OMD->param_begin(),
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E = OMD->param_end(); PI != E; ++PI)
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Args.push_back(std::make_pair(*PI, (*PI)->getType()));
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StartFunction(OMD, OMD->getResultType(), Fn, Args, OMD->getLocStart());
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}
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/// Generate an Objective-C method. An Objective-C method is a C function with
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/// its pointer, name, and types registered in the class struture.
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void CodeGenFunction::GenerateObjCMethod(const ObjCMethodDecl *OMD) {
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StartObjCMethod(OMD, OMD->getClassInterface());
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EmitStmt(OMD->getBody());
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FinishFunction(OMD->getBodyRBrace());
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}
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// FIXME: I wasn't sure about the synthesis approach. If we end up generating an
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// AST for the whole body we can just fall back to having a GenerateFunction
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// which takes the body Stmt.
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/// GenerateObjCGetter - Generate an Objective-C property getter
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/// function. The given Decl must be an ObjCImplementationDecl. @synthesize
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/// is illegal within a category.
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void CodeGenFunction::GenerateObjCGetter(ObjCImplementationDecl *IMP,
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const ObjCPropertyImplDecl *PID) {
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ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl();
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const ObjCPropertyDecl *PD = PID->getPropertyDecl();
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bool IsAtomic =
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!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic);
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ObjCMethodDecl *OMD = PD->getGetterMethodDecl();
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assert(OMD && "Invalid call to generate getter (empty method)");
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StartObjCMethod(OMD, IMP->getClassInterface());
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// Determine if we should use an objc_getProperty call for
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// this. Non-atomic properties are directly evaluated.
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// atomic 'copy' and 'retain' properties are also directly
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// evaluated in gc-only mode.
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if (CGM.getLangOptions().getGCMode() != LangOptions::GCOnly &&
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IsAtomic &&
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(PD->getSetterKind() == ObjCPropertyDecl::Copy ||
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PD->getSetterKind() == ObjCPropertyDecl::Retain)) {
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llvm::Value *GetPropertyFn =
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CGM.getObjCRuntime().GetPropertyGetFunction();
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if (!GetPropertyFn) {
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CGM.ErrorUnsupported(PID, "Obj-C getter requiring atomic copy");
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FinishFunction();
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return;
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}
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// Return (ivar-type) objc_getProperty((id) self, _cmd, offset, true).
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// FIXME: Can't this be simpler? This might even be worse than the
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// corresponding gcc code.
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CodeGenTypes &Types = CGM.getTypes();
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ValueDecl *Cmd = OMD->getCmdDecl();
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llvm::Value *CmdVal = Builder.CreateLoad(LocalDeclMap[Cmd], "cmd");
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QualType IdTy = getContext().getObjCIdType();
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llvm::Value *SelfAsId =
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Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy));
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llvm::Value *Offset = EmitIvarOffset(IMP->getClassInterface(), Ivar);
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llvm::Value *True =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 1);
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CallArgList Args;
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Args.push_back(std::make_pair(RValue::get(SelfAsId), IdTy));
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Args.push_back(std::make_pair(RValue::get(CmdVal), Cmd->getType()));
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Args.push_back(std::make_pair(RValue::get(Offset), getContext().LongTy));
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Args.push_back(std::make_pair(RValue::get(True), getContext().BoolTy));
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// FIXME: We shouldn't need to get the function info here, the
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// runtime already should have computed it to build the function.
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RValue RV = EmitCall(Types.getFunctionInfo(PD->getType(), Args,
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FunctionType::ExtInfo()),
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GetPropertyFn, ReturnValueSlot(), Args);
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// We need to fix the type here. Ivars with copy & retain are
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// always objects so we don't need to worry about complex or
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// aggregates.
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RV = RValue::get(Builder.CreateBitCast(RV.getScalarVal(),
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Types.ConvertType(PD->getType())));
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EmitReturnOfRValue(RV, PD->getType());
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} else {
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if (Ivar->getType()->isAnyComplexType()) {
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LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(),
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Ivar, 0);
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ComplexPairTy Pair = LoadComplexFromAddr(LV.getAddress(),
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LV.isVolatileQualified());
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StoreComplexToAddr(Pair, ReturnValue, LV.isVolatileQualified());
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}
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else if (hasAggregateLLVMType(Ivar->getType())) {
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bool IsStrong = false;
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if ((IsAtomic || (IsStrong = IvarTypeWithAggrGCObjects(Ivar->getType())))
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&& CurFnInfo->getReturnInfo().getKind() == ABIArgInfo::Indirect
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&& CGM.getObjCRuntime().GetCopyStructFunction()) {
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LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(),
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Ivar, 0);
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llvm::Value *GetCopyStructFn =
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CGM.getObjCRuntime().GetCopyStructFunction();
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CodeGenTypes &Types = CGM.getTypes();
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// objc_copyStruct (ReturnValue, &structIvar,
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// sizeof (Type of Ivar), isAtomic, false);
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CallArgList Args;
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RValue RV = RValue::get(Builder.CreateBitCast(ReturnValue,
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Types.ConvertType(getContext().VoidPtrTy)));
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Args.push_back(std::make_pair(RV, getContext().VoidPtrTy));
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RV = RValue::get(Builder.CreateBitCast(LV.getAddress(),
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Types.ConvertType(getContext().VoidPtrTy)));
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Args.push_back(std::make_pair(RV, getContext().VoidPtrTy));
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// sizeof (Type of Ivar)
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uint64_t Size = getContext().getTypeSize(Ivar->getType()) / 8;
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llvm::Value *SizeVal =
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llvm::ConstantInt::get(Types.ConvertType(getContext().LongTy), Size);
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Args.push_back(std::make_pair(RValue::get(SizeVal),
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getContext().LongTy));
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llvm::Value *isAtomic =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy),
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IsAtomic ? 1 : 0);
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Args.push_back(std::make_pair(RValue::get(isAtomic),
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getContext().BoolTy));
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llvm::Value *hasStrong =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy),
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IsStrong ? 1 : 0);
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Args.push_back(std::make_pair(RValue::get(hasStrong),
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getContext().BoolTy));
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EmitCall(Types.getFunctionInfo(getContext().VoidTy, Args,
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FunctionType::ExtInfo()),
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GetCopyStructFn, ReturnValueSlot(), Args);
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}
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else {
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if (PID->getGetterCXXConstructor()) {
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ReturnStmt *Stmt =
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new (getContext()) ReturnStmt(SourceLocation(),
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PID->getGetterCXXConstructor(),
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0);
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EmitReturnStmt(*Stmt);
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}
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else {
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LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(),
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Ivar, 0);
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EmitAggregateCopy(ReturnValue, LV.getAddress(), Ivar->getType());
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}
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}
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} else {
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LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(),
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Ivar, 0);
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CodeGenTypes &Types = CGM.getTypes();
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RValue RV = EmitLoadOfLValue(LV, Ivar->getType());
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RV = RValue::get(Builder.CreateBitCast(RV.getScalarVal(),
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Types.ConvertType(PD->getType())));
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EmitReturnOfRValue(RV, PD->getType());
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}
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}
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FinishFunction();
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}
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/// GenerateObjCSetter - Generate an Objective-C property setter
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/// function. The given Decl must be an ObjCImplementationDecl. @synthesize
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/// is illegal within a category.
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void CodeGenFunction::GenerateObjCSetter(ObjCImplementationDecl *IMP,
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const ObjCPropertyImplDecl *PID) {
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ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl();
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const ObjCPropertyDecl *PD = PID->getPropertyDecl();
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ObjCMethodDecl *OMD = PD->getSetterMethodDecl();
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assert(OMD && "Invalid call to generate setter (empty method)");
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StartObjCMethod(OMD, IMP->getClassInterface());
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bool IsCopy = PD->getSetterKind() == ObjCPropertyDecl::Copy;
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bool IsAtomic =
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!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic);
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// Determine if we should use an objc_setProperty call for
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// this. Properties with 'copy' semantics always use it, as do
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// non-atomic properties with 'release' semantics as long as we are
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// not in gc-only mode.
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if (IsCopy ||
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(CGM.getLangOptions().getGCMode() != LangOptions::GCOnly &&
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PD->getSetterKind() == ObjCPropertyDecl::Retain)) {
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llvm::Value *SetPropertyFn =
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CGM.getObjCRuntime().GetPropertySetFunction();
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if (!SetPropertyFn) {
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CGM.ErrorUnsupported(PID, "Obj-C getter requiring atomic copy");
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FinishFunction();
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return;
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}
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// Emit objc_setProperty((id) self, _cmd, offset, arg,
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// <is-atomic>, <is-copy>).
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// FIXME: Can't this be simpler? This might even be worse than the
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// corresponding gcc code.
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CodeGenTypes &Types = CGM.getTypes();
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ValueDecl *Cmd = OMD->getCmdDecl();
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llvm::Value *CmdVal = Builder.CreateLoad(LocalDeclMap[Cmd], "cmd");
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QualType IdTy = getContext().getObjCIdType();
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llvm::Value *SelfAsId =
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Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy));
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llvm::Value *Offset = EmitIvarOffset(IMP->getClassInterface(), Ivar);
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llvm::Value *Arg = LocalDeclMap[*OMD->param_begin()];
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llvm::Value *ArgAsId =
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Builder.CreateBitCast(Builder.CreateLoad(Arg, "arg"),
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Types.ConvertType(IdTy));
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llvm::Value *True =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 1);
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llvm::Value *False =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 0);
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CallArgList Args;
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Args.push_back(std::make_pair(RValue::get(SelfAsId), IdTy));
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Args.push_back(std::make_pair(RValue::get(CmdVal), Cmd->getType()));
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Args.push_back(std::make_pair(RValue::get(Offset), getContext().LongTy));
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Args.push_back(std::make_pair(RValue::get(ArgAsId), IdTy));
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Args.push_back(std::make_pair(RValue::get(IsAtomic ? True : False),
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getContext().BoolTy));
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Args.push_back(std::make_pair(RValue::get(IsCopy ? True : False),
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getContext().BoolTy));
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// FIXME: We shouldn't need to get the function info here, the runtime
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// already should have computed it to build the function.
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EmitCall(Types.getFunctionInfo(getContext().VoidTy, Args,
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FunctionType::ExtInfo()),
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SetPropertyFn,
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ReturnValueSlot(), Args);
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} else if (IsAtomic && hasAggregateLLVMType(Ivar->getType()) &&
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!Ivar->getType()->isAnyComplexType() &&
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IndirectObjCSetterArg(*CurFnInfo)
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&& CGM.getObjCRuntime().GetCopyStructFunction()) {
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// objc_copyStruct (&structIvar, &Arg,
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// sizeof (struct something), true, false);
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llvm::Value *GetCopyStructFn =
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CGM.getObjCRuntime().GetCopyStructFunction();
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CodeGenTypes &Types = CGM.getTypes();
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CallArgList Args;
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LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), Ivar, 0);
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RValue RV = RValue::get(Builder.CreateBitCast(LV.getAddress(),
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Types.ConvertType(getContext().VoidPtrTy)));
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Args.push_back(std::make_pair(RV, getContext().VoidPtrTy));
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llvm::Value *Arg = LocalDeclMap[*OMD->param_begin()];
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llvm::Value *ArgAsPtrTy =
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Builder.CreateBitCast(Arg,
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Types.ConvertType(getContext().VoidPtrTy));
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RV = RValue::get(ArgAsPtrTy);
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Args.push_back(std::make_pair(RV, getContext().VoidPtrTy));
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// sizeof (Type of Ivar)
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uint64_t Size = getContext().getTypeSize(Ivar->getType()) / 8;
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llvm::Value *SizeVal =
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llvm::ConstantInt::get(Types.ConvertType(getContext().LongTy), Size);
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Args.push_back(std::make_pair(RValue::get(SizeVal),
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getContext().LongTy));
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llvm::Value *True =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 1);
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Args.push_back(std::make_pair(RValue::get(True), getContext().BoolTy));
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llvm::Value *False =
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llvm::ConstantInt::get(Types.ConvertType(getContext().BoolTy), 0);
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Args.push_back(std::make_pair(RValue::get(False), getContext().BoolTy));
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EmitCall(Types.getFunctionInfo(getContext().VoidTy, Args,
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FunctionType::ExtInfo()),
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GetCopyStructFn, ReturnValueSlot(), Args);
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} else if (PID->getSetterCXXAssignment()) {
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EmitIgnoredExpr(PID->getSetterCXXAssignment());
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} else {
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// FIXME: Find a clean way to avoid AST node creation.
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SourceLocation Loc = PD->getLocation();
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ValueDecl *Self = OMD->getSelfDecl();
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ObjCIvarDecl *Ivar = PID->getPropertyIvarDecl();
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DeclRefExpr Base(Self, Self->getType(), VK_RValue, Loc);
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ParmVarDecl *ArgDecl = *OMD->param_begin();
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DeclRefExpr Arg(ArgDecl, ArgDecl->getType(), VK_LValue, Loc);
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ObjCIvarRefExpr IvarRef(Ivar, Ivar->getType(), Loc, &Base, true, true);
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// The property type can differ from the ivar type in some situations with
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// Objective-C pointer types, we can always bit cast the RHS in these cases.
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if (getContext().getCanonicalType(Ivar->getType()) !=
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getContext().getCanonicalType(ArgDecl->getType())) {
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ImplicitCastExpr ArgCasted(ImplicitCastExpr::OnStack,
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Ivar->getType(), CK_BitCast, &Arg,
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VK_RValue);
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BinaryOperator Assign(&IvarRef, &ArgCasted, BO_Assign,
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Ivar->getType(), VK_RValue, OK_Ordinary, Loc);
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EmitStmt(&Assign);
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} else {
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BinaryOperator Assign(&IvarRef, &Arg, BO_Assign,
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Ivar->getType(), VK_RValue, OK_Ordinary, Loc);
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EmitStmt(&Assign);
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}
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}
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FinishFunction();
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}
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void CodeGenFunction::GenerateObjCCtorDtorMethod(ObjCImplementationDecl *IMP,
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ObjCMethodDecl *MD,
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bool ctor) {
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llvm::SmallVector<CXXBaseOrMemberInitializer *, 8> IvarInitializers;
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MD->createImplicitParams(CGM.getContext(), IMP->getClassInterface());
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StartObjCMethod(MD, IMP->getClassInterface());
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for (ObjCImplementationDecl::init_const_iterator B = IMP->init_begin(),
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E = IMP->init_end(); B != E; ++B) {
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|
CXXBaseOrMemberInitializer *Member = (*B);
|
|
IvarInitializers.push_back(Member);
|
|
}
|
|
if (ctor) {
|
|
for (unsigned I = 0, E = IvarInitializers.size(); I != E; ++I) {
|
|
CXXBaseOrMemberInitializer *IvarInit = IvarInitializers[I];
|
|
FieldDecl *Field = IvarInit->getAnyMember();
|
|
QualType FieldType = Field->getType();
|
|
ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field);
|
|
LValue LV = EmitLValueForIvar(TypeOfSelfObject(),
|
|
LoadObjCSelf(), Ivar, 0);
|
|
EmitAggExpr(IvarInit->getInit(), AggValueSlot::forLValue(LV, true));
|
|
}
|
|
// constructor returns 'self'.
|
|
CodeGenTypes &Types = CGM.getTypes();
|
|
QualType IdTy(CGM.getContext().getObjCIdType());
|
|
llvm::Value *SelfAsId =
|
|
Builder.CreateBitCast(LoadObjCSelf(), Types.ConvertType(IdTy));
|
|
EmitReturnOfRValue(RValue::get(SelfAsId), IdTy);
|
|
} else {
|
|
// dtor
|
|
for (size_t i = IvarInitializers.size(); i > 0; --i) {
|
|
FieldDecl *Field = IvarInitializers[i - 1]->getAnyMember();
|
|
QualType FieldType = Field->getType();
|
|
const ConstantArrayType *Array =
|
|
getContext().getAsConstantArrayType(FieldType);
|
|
if (Array)
|
|
FieldType = getContext().getBaseElementType(FieldType);
|
|
|
|
ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(Field);
|
|
LValue LV = EmitLValueForIvar(TypeOfSelfObject(),
|
|
LoadObjCSelf(), Ivar, 0);
|
|
const RecordType *RT = FieldType->getAs<RecordType>();
|
|
CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl());
|
|
CXXDestructorDecl *Dtor = FieldClassDecl->getDestructor();
|
|
if (!Dtor->isTrivial()) {
|
|
if (Array) {
|
|
const llvm::Type *BasePtr = ConvertType(FieldType);
|
|
BasePtr = llvm::PointerType::getUnqual(BasePtr);
|
|
llvm::Value *BaseAddrPtr =
|
|
Builder.CreateBitCast(LV.getAddress(), BasePtr);
|
|
EmitCXXAggrDestructorCall(Dtor,
|
|
Array, BaseAddrPtr);
|
|
} else {
|
|
EmitCXXDestructorCall(Dtor,
|
|
Dtor_Complete, /*ForVirtualBase=*/false,
|
|
LV.getAddress());
|
|
}
|
|
}
|
|
}
|
|
}
|
|
FinishFunction();
|
|
}
|
|
|
|
bool CodeGenFunction::IndirectObjCSetterArg(const CGFunctionInfo &FI) {
|
|
CGFunctionInfo::const_arg_iterator it = FI.arg_begin();
|
|
it++; it++;
|
|
const ABIArgInfo &AI = it->info;
|
|
// FIXME. Is this sufficient check?
|
|
return (AI.getKind() == ABIArgInfo::Indirect);
|
|
}
|
|
|
|
bool CodeGenFunction::IvarTypeWithAggrGCObjects(QualType Ty) {
|
|
if (CGM.getLangOptions().getGCMode() == LangOptions::NonGC)
|
|
return false;
|
|
if (const RecordType *FDTTy = Ty.getTypePtr()->getAs<RecordType>())
|
|
return FDTTy->getDecl()->hasObjectMember();
|
|
return false;
|
|
}
|
|
|
|
llvm::Value *CodeGenFunction::LoadObjCSelf() {
|
|
const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
|
|
return Builder.CreateLoad(LocalDeclMap[OMD->getSelfDecl()], "self");
|
|
}
|
|
|
|
QualType CodeGenFunction::TypeOfSelfObject() {
|
|
const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
|
|
ImplicitParamDecl *selfDecl = OMD->getSelfDecl();
|
|
const ObjCObjectPointerType *PTy = cast<ObjCObjectPointerType>(
|
|
getContext().getCanonicalType(selfDecl->getType()));
|
|
return PTy->getPointeeType();
|
|
}
|
|
|
|
LValue
|
|
CodeGenFunction::EmitObjCPropertyRefLValue(const ObjCPropertyRefExpr *E) {
|
|
// This is a special l-value that just issues sends when we load or
|
|
// store through it.
|
|
|
|
// For certain base kinds, we need to emit the base immediately.
|
|
llvm::Value *Base;
|
|
if (E->isSuperReceiver())
|
|
Base = LoadObjCSelf();
|
|
else if (E->isClassReceiver())
|
|
Base = CGM.getObjCRuntime().GetClass(Builder, E->getClassReceiver());
|
|
else
|
|
Base = EmitScalarExpr(E->getBase());
|
|
return LValue::MakePropertyRef(E, Base);
|
|
}
|
|
|
|
static RValue GenerateMessageSendSuper(CodeGenFunction &CGF,
|
|
ReturnValueSlot Return,
|
|
QualType ResultType,
|
|
Selector S,
|
|
llvm::Value *Receiver,
|
|
const CallArgList &CallArgs) {
|
|
const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CGF.CurFuncDecl);
|
|
bool isClassMessage = OMD->isClassMethod();
|
|
bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext());
|
|
return CGF.CGM.getObjCRuntime()
|
|
.GenerateMessageSendSuper(CGF, Return, ResultType,
|
|
S, OMD->getClassInterface(),
|
|
isCategoryImpl, Receiver,
|
|
isClassMessage, CallArgs);
|
|
}
|
|
|
|
RValue CodeGenFunction::EmitLoadOfPropertyRefLValue(LValue LV,
|
|
ReturnValueSlot Return) {
|
|
const ObjCPropertyRefExpr *E = LV.getPropertyRefExpr();
|
|
QualType ResultType;
|
|
Selector S;
|
|
if (E->isExplicitProperty()) {
|
|
const ObjCPropertyDecl *Property = E->getExplicitProperty();
|
|
S = Property->getGetterName();
|
|
ResultType = E->getType();
|
|
} else {
|
|
const ObjCMethodDecl *Getter = E->getImplicitPropertyGetter();
|
|
S = Getter->getSelector();
|
|
ResultType = Getter->getResultType(); // with reference!
|
|
}
|
|
|
|
llvm::Value *Receiver = LV.getPropertyRefBaseAddr();
|
|
|
|
// Accesses to 'super' follow a different code path.
|
|
if (E->isSuperReceiver())
|
|
return GenerateMessageSendSuper(*this, Return, ResultType,
|
|
S, Receiver, CallArgList());
|
|
|
|
const ObjCInterfaceDecl *ReceiverClass
|
|
= (E->isClassReceiver() ? E->getClassReceiver() : 0);
|
|
return CGM.getObjCRuntime().
|
|
GenerateMessageSend(*this, Return, ResultType, S,
|
|
Receiver, CallArgList(), ReceiverClass);
|
|
}
|
|
|
|
void CodeGenFunction::EmitStoreThroughPropertyRefLValue(RValue Src,
|
|
LValue Dst) {
|
|
const ObjCPropertyRefExpr *E = Dst.getPropertyRefExpr();
|
|
Selector S = E->getSetterSelector();
|
|
QualType ArgType;
|
|
if (E->isImplicitProperty()) {
|
|
const ObjCMethodDecl *Setter = E->getImplicitPropertySetter();
|
|
ObjCMethodDecl::param_iterator P = Setter->param_begin();
|
|
ArgType = (*P)->getType();
|
|
} else {
|
|
ArgType = E->getType();
|
|
}
|
|
|
|
CallArgList Args;
|
|
Args.push_back(std::make_pair(Src, ArgType));
|
|
|
|
llvm::Value *Receiver = Dst.getPropertyRefBaseAddr();
|
|
QualType ResultType = getContext().VoidTy;
|
|
|
|
if (E->isSuperReceiver()) {
|
|
GenerateMessageSendSuper(*this, ReturnValueSlot(),
|
|
ResultType, S, Receiver, Args);
|
|
return;
|
|
}
|
|
|
|
const ObjCInterfaceDecl *ReceiverClass
|
|
= (E->isClassReceiver() ? E->getClassReceiver() : 0);
|
|
|
|
CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(),
|
|
ResultType, S, Receiver, Args,
|
|
ReceiverClass);
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){
|
|
llvm::Constant *EnumerationMutationFn =
|
|
CGM.getObjCRuntime().EnumerationMutationFunction();
|
|
llvm::Value *DeclAddress;
|
|
QualType ElementTy;
|
|
|
|
if (!EnumerationMutationFn) {
|
|
CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime");
|
|
return;
|
|
}
|
|
|
|
if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) {
|
|
EmitStmt(SD);
|
|
assert(HaveInsertPoint() && "DeclStmt destroyed insert point!");
|
|
const Decl* D = SD->getSingleDecl();
|
|
ElementTy = cast<ValueDecl>(D)->getType();
|
|
DeclAddress = LocalDeclMap[D];
|
|
} else {
|
|
ElementTy = cast<Expr>(S.getElement())->getType();
|
|
DeclAddress = 0;
|
|
}
|
|
|
|
// Fast enumeration state.
|
|
QualType StateTy = getContext().getObjCFastEnumerationStateType();
|
|
llvm::Value *StatePtr = CreateMemTemp(StateTy, "state.ptr");
|
|
EmitNullInitialization(StatePtr, StateTy);
|
|
|
|
// Number of elements in the items array.
|
|
static const unsigned NumItems = 16;
|
|
|
|
// Get selector
|
|
IdentifierInfo *II[] = {
|
|
&CGM.getContext().Idents.get("countByEnumeratingWithState"),
|
|
&CGM.getContext().Idents.get("objects"),
|
|
&CGM.getContext().Idents.get("count")
|
|
};
|
|
Selector FastEnumSel =
|
|
CGM.getContext().Selectors.getSelector(llvm::array_lengthof(II), &II[0]);
|
|
|
|
QualType ItemsTy =
|
|
getContext().getConstantArrayType(getContext().getObjCIdType(),
|
|
llvm::APInt(32, NumItems),
|
|
ArrayType::Normal, 0);
|
|
llvm::Value *ItemsPtr = CreateMemTemp(ItemsTy, "items.ptr");
|
|
|
|
llvm::Value *Collection = EmitScalarExpr(S.getCollection());
|
|
|
|
CallArgList Args;
|
|
Args.push_back(std::make_pair(RValue::get(StatePtr),
|
|
getContext().getPointerType(StateTy)));
|
|
|
|
Args.push_back(std::make_pair(RValue::get(ItemsPtr),
|
|
getContext().getPointerType(ItemsTy)));
|
|
|
|
const llvm::Type *UnsignedLongLTy = ConvertType(getContext().UnsignedLongTy);
|
|
llvm::Constant *Count = llvm::ConstantInt::get(UnsignedLongLTy, NumItems);
|
|
Args.push_back(std::make_pair(RValue::get(Count),
|
|
getContext().UnsignedLongTy));
|
|
|
|
RValue CountRV =
|
|
CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(),
|
|
getContext().UnsignedLongTy,
|
|
FastEnumSel,
|
|
Collection, Args);
|
|
|
|
llvm::Value *LimitPtr = CreateMemTemp(getContext().UnsignedLongTy,
|
|
"limit.ptr");
|
|
Builder.CreateStore(CountRV.getScalarVal(), LimitPtr);
|
|
|
|
llvm::BasicBlock *NoElements = createBasicBlock("noelements");
|
|
llvm::BasicBlock *SetStartMutations = createBasicBlock("setstartmutations");
|
|
|
|
llvm::Value *Limit = Builder.CreateLoad(LimitPtr);
|
|
llvm::Value *Zero = llvm::Constant::getNullValue(UnsignedLongLTy);
|
|
|
|
llvm::Value *IsZero = Builder.CreateICmpEQ(Limit, Zero, "iszero");
|
|
Builder.CreateCondBr(IsZero, NoElements, SetStartMutations);
|
|
|
|
EmitBlock(SetStartMutations);
|
|
|
|
llvm::Value *StartMutationsPtr = CreateMemTemp(getContext().UnsignedLongTy);
|
|
|
|
llvm::Value *StateMutationsPtrPtr =
|
|
Builder.CreateStructGEP(StatePtr, 2, "mutationsptr.ptr");
|
|
llvm::Value *StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr,
|
|
"mutationsptr");
|
|
|
|
llvm::Value *StateMutations = Builder.CreateLoad(StateMutationsPtr,
|
|
"mutations");
|
|
|
|
Builder.CreateStore(StateMutations, StartMutationsPtr);
|
|
|
|
llvm::BasicBlock *LoopStart = createBasicBlock("loopstart");
|
|
EmitBlock(LoopStart);
|
|
|
|
llvm::Value *CounterPtr = CreateMemTemp(getContext().UnsignedLongTy,
|
|
"counter.ptr");
|
|
Builder.CreateStore(Zero, CounterPtr);
|
|
|
|
llvm::BasicBlock *LoopBody = createBasicBlock("loopbody");
|
|
EmitBlock(LoopBody);
|
|
|
|
StateMutationsPtr = Builder.CreateLoad(StateMutationsPtrPtr, "mutationsptr");
|
|
StateMutations = Builder.CreateLoad(StateMutationsPtr, "statemutations");
|
|
|
|
llvm::Value *StartMutations = Builder.CreateLoad(StartMutationsPtr,
|
|
"mutations");
|
|
llvm::Value *MutationsEqual = Builder.CreateICmpEQ(StateMutations,
|
|
StartMutations,
|
|
"tobool");
|
|
|
|
|
|
llvm::BasicBlock *WasMutated = createBasicBlock("wasmutated");
|
|
llvm::BasicBlock *WasNotMutated = createBasicBlock("wasnotmutated");
|
|
|
|
Builder.CreateCondBr(MutationsEqual, WasNotMutated, WasMutated);
|
|
|
|
EmitBlock(WasMutated);
|
|
llvm::Value *V =
|
|
Builder.CreateBitCast(Collection,
|
|
ConvertType(getContext().getObjCIdType()),
|
|
"tmp");
|
|
CallArgList Args2;
|
|
Args2.push_back(std::make_pair(RValue::get(V),
|
|
getContext().getObjCIdType()));
|
|
// FIXME: We shouldn't need to get the function info here, the runtime already
|
|
// should have computed it to build the function.
|
|
EmitCall(CGM.getTypes().getFunctionInfo(getContext().VoidTy, Args2,
|
|
FunctionType::ExtInfo()),
|
|
EnumerationMutationFn, ReturnValueSlot(), Args2);
|
|
|
|
EmitBlock(WasNotMutated);
|
|
|
|
llvm::Value *StateItemsPtr =
|
|
Builder.CreateStructGEP(StatePtr, 1, "stateitems.ptr");
|
|
|
|
llvm::Value *Counter = Builder.CreateLoad(CounterPtr, "counter");
|
|
|
|
llvm::Value *EnumStateItems = Builder.CreateLoad(StateItemsPtr,
|
|
"stateitems");
|
|
|
|
llvm::Value *CurrentItemPtr =
|
|
Builder.CreateGEP(EnumStateItems, Counter, "currentitem.ptr");
|
|
|
|
llvm::Value *CurrentItem = Builder.CreateLoad(CurrentItemPtr, "currentitem");
|
|
|
|
// Cast the item to the right type.
|
|
CurrentItem = Builder.CreateBitCast(CurrentItem,
|
|
ConvertType(ElementTy), "tmp");
|
|
|
|
if (!DeclAddress) {
|
|
LValue LV = EmitLValue(cast<Expr>(S.getElement()));
|
|
|
|
// Set the value to null.
|
|
Builder.CreateStore(CurrentItem, LV.getAddress());
|
|
} else
|
|
Builder.CreateStore(CurrentItem, DeclAddress);
|
|
|
|
// Increment the counter.
|
|
Counter = Builder.CreateAdd(Counter,
|
|
llvm::ConstantInt::get(UnsignedLongLTy, 1));
|
|
Builder.CreateStore(Counter, CounterPtr);
|
|
|
|
JumpDest LoopEnd = getJumpDestInCurrentScope("loopend");
|
|
JumpDest AfterBody = getJumpDestInCurrentScope("afterbody");
|
|
|
|
BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody));
|
|
|
|
EmitStmt(S.getBody());
|
|
|
|
BreakContinueStack.pop_back();
|
|
|
|
EmitBlock(AfterBody.getBlock());
|
|
|
|
llvm::BasicBlock *FetchMore = createBasicBlock("fetchmore");
|
|
|
|
Counter = Builder.CreateLoad(CounterPtr);
|
|
Limit = Builder.CreateLoad(LimitPtr);
|
|
llvm::Value *IsLess = Builder.CreateICmpULT(Counter, Limit, "isless");
|
|
Builder.CreateCondBr(IsLess, LoopBody, FetchMore);
|
|
|
|
// Fetch more elements.
|
|
EmitBlock(FetchMore);
|
|
|
|
CountRV =
|
|
CGM.getObjCRuntime().GenerateMessageSend(*this, ReturnValueSlot(),
|
|
getContext().UnsignedLongTy,
|
|
FastEnumSel,
|
|
Collection, Args);
|
|
Builder.CreateStore(CountRV.getScalarVal(), LimitPtr);
|
|
Limit = Builder.CreateLoad(LimitPtr);
|
|
|
|
IsZero = Builder.CreateICmpEQ(Limit, Zero, "iszero");
|
|
Builder.CreateCondBr(IsZero, NoElements, LoopStart);
|
|
|
|
// No more elements.
|
|
EmitBlock(NoElements);
|
|
|
|
if (!DeclAddress) {
|
|
// If the element was not a declaration, set it to be null.
|
|
|
|
LValue LV = EmitLValue(cast<Expr>(S.getElement()));
|
|
|
|
// Set the value to null.
|
|
Builder.CreateStore(llvm::Constant::getNullValue(ConvertType(ElementTy)),
|
|
LV.getAddress());
|
|
}
|
|
|
|
EmitBlock(LoopEnd.getBlock());
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S) {
|
|
CGM.getObjCRuntime().EmitTryStmt(*this, S);
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S) {
|
|
CGM.getObjCRuntime().EmitThrowStmt(*this, S);
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCAtSynchronizedStmt(
|
|
const ObjCAtSynchronizedStmt &S) {
|
|
CGM.getObjCRuntime().EmitSynchronizedStmt(*this, S);
|
|
}
|
|
|
|
CGObjCRuntime::~CGObjCRuntime() {}
|
|
|
|
|