645 lines
26 KiB
C++
645 lines
26 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 = CGM.getObjCRuntime().GenerateConstantString(E);
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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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// 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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const Expr *ReceiverExpr = E->getReceiver();
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bool isSuperMessage = false;
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bool isClassMessage = false;
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// Find the receiver
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llvm::Value *Receiver;
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if (!ReceiverExpr) {
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const ObjCInterfaceDecl *OID = E->getClassInfo().first;
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// Very special case, super send in class method. The receiver is
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// self (the class object) and the send uses super semantics.
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if (!OID) {
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assert(E->getClassName()->isStr("super") &&
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"Unexpected missing class interface in message send.");
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isSuperMessage = true;
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Receiver = LoadObjCSelf();
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} else {
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Receiver = Runtime.GetClass(Builder, OID);
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}
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isClassMessage = true;
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} else if (isa<ObjCSuperExpr>(E->getReceiver())) {
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isSuperMessage = true;
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Receiver = LoadObjCSelf();
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} else {
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Receiver = EmitScalarExpr(E->getReceiver());
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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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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, E->getType(),
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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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}
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return Runtime.GenerateMessageSend(*this, E->getType(), E->getSelector(),
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Receiver, isClassMessage, Args,
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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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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->getLocEnd());
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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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// Check if we should generate debug info for this method.
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if (CGM.getDebugInfo() && !OMD->hasAttr<NodebugAttr>(getContext()))
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DebugInfo = CGM.getDebugInfo();
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StartObjCMethod(OMD, OMD->getClassInterface());
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EmitStmt(OMD->getBody(getContext()));
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FinishFunction(OMD->getBodyRBrace(getContext()));
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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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ObjCMethodDecl *OMD = PD->getGetterMethodDecl();
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assert(OMD && "Invalid call to generate getter (empty method)");
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// FIXME: This is rather murky, we create this here since they will not have
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// been created by Sema for us.
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OMD->createImplicitParams(getContext(), IMP->getClassInterface());
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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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!(PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
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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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GetPropertyFn, 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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LValue LV = EmitLValueForIvar(TypeOfSelfObject(), LoadObjCSelf(), Ivar, 0);
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if (hasAggregateLLVMType(Ivar->getType())) {
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EmitAggregateCopy(ReturnValue, LV.getAddress(), Ivar->getType());
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}
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else {
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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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// FIXME: This is rather murky, we create this here since they will not have
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// been created by Sema for us.
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OMD->createImplicitParams(getContext(), IMP->getClassInterface());
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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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SetPropertyFn, Args);
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} else {
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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(), Loc);
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ParmVarDecl *ArgDecl = *OMD->param_begin();
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DeclRefExpr Arg(ArgDecl, ArgDecl->getType(), Loc);
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ObjCIvarRefExpr IvarRef(Ivar, Ivar->getType(), Loc, &Base,
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true, true);
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BinaryOperator Assign(&IvarRef, &Arg, BinaryOperator::Assign,
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Ivar->getType(), Loc);
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EmitStmt(&Assign);
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}
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FinishFunction();
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}
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llvm::Value *CodeGenFunction::LoadObjCSelf() {
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const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
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// See if we need to lazily forward self inside a block literal.
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BlockForwardSelf();
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return Builder.CreateLoad(LocalDeclMap[OMD->getSelfDecl()], "self");
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}
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QualType CodeGenFunction::TypeOfSelfObject() {
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const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
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ImplicitParamDecl *selfDecl = OMD->getSelfDecl();
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const PointerType *PTy =
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cast<PointerType>(getContext().getCanonicalType(selfDecl->getType()));
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return PTy->getPointeeType();
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}
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RValue CodeGenFunction::EmitObjCSuperPropertyGet(const Expr *Exp,
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const Selector &S) {
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llvm::Value *Receiver = LoadObjCSelf();
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const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
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bool isClassMessage = OMD->isClassMethod();
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bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext());
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return CGM.getObjCRuntime().GenerateMessageSendSuper(*this,
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Exp->getType(),
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S,
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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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CallArgList());
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}
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RValue CodeGenFunction::EmitObjCPropertyGet(const Expr *Exp) {
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// FIXME: Split it into two separate routines.
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if (const ObjCPropertyRefExpr *E = dyn_cast<ObjCPropertyRefExpr>(Exp)) {
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Selector S = E->getProperty()->getGetterName();
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if (isa<ObjCSuperExpr>(E->getBase()))
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return EmitObjCSuperPropertyGet(E, S);
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return CGM.getObjCRuntime().
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GenerateMessageSend(*this, Exp->getType(), S,
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EmitScalarExpr(E->getBase()),
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false, CallArgList());
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}
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else {
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const ObjCKVCRefExpr *KE = cast<ObjCKVCRefExpr>(Exp);
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Selector S = KE->getGetterMethod()->getSelector();
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llvm::Value *Receiver;
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if (KE->getClassProp()) {
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const ObjCInterfaceDecl *OID = KE->getClassProp();
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Receiver = CGM.getObjCRuntime().GetClass(Builder, OID);
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}
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else if (isa<ObjCSuperExpr>(KE->getBase()))
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return EmitObjCSuperPropertyGet(KE, S);
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else
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Receiver = EmitScalarExpr(KE->getBase());
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return CGM.getObjCRuntime().
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GenerateMessageSend(*this, Exp->getType(), S,
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Receiver,
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KE->getClassProp() != 0, CallArgList());
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}
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}
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void CodeGenFunction::EmitObjCSuperPropertySet(const Expr *Exp,
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const Selector &S,
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RValue Src) {
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CallArgList Args;
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llvm::Value *Receiver = LoadObjCSelf();
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const ObjCMethodDecl *OMD = cast<ObjCMethodDecl>(CurFuncDecl);
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bool isClassMessage = OMD->isClassMethod();
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bool isCategoryImpl = isa<ObjCCategoryImplDecl>(OMD->getDeclContext());
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Args.push_back(std::make_pair(Src, Exp->getType()));
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CGM.getObjCRuntime().GenerateMessageSendSuper(*this,
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Exp->getType(),
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S,
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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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return;
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}
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void CodeGenFunction::EmitObjCPropertySet(const Expr *Exp,
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RValue Src) {
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// FIXME: Split it into two separate routines.
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if (const ObjCPropertyRefExpr *E = dyn_cast<ObjCPropertyRefExpr>(Exp)) {
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Selector S = E->getProperty()->getSetterName();
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if (isa<ObjCSuperExpr>(E->getBase())) {
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EmitObjCSuperPropertySet(E, S, Src);
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return;
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}
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CallArgList Args;
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Args.push_back(std::make_pair(Src, E->getType()));
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CGM.getObjCRuntime().GenerateMessageSend(*this, getContext().VoidTy, S,
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EmitScalarExpr(E->getBase()),
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false, Args);
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}
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else if (const ObjCKVCRefExpr *E = dyn_cast<ObjCKVCRefExpr>(Exp)) {
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Selector S = E->getSetterMethod()->getSelector();
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CallArgList Args;
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llvm::Value *Receiver;
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if (E->getClassProp()) {
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const ObjCInterfaceDecl *OID = E->getClassProp();
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Receiver = CGM.getObjCRuntime().GetClass(Builder, OID);
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}
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else if (isa<ObjCSuperExpr>(E->getBase())) {
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EmitObjCSuperPropertySet(E, S, Src);
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return;
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}
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else
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Receiver = EmitScalarExpr(E->getBase());
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Args.push_back(std::make_pair(Src, E->getType()));
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CGM.getObjCRuntime().GenerateMessageSend(*this, getContext().VoidTy, S,
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Receiver,
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E->getClassProp() != 0, Args);
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}
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else
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assert (0 && "bad expression node in EmitObjCPropertySet");
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}
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void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){
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llvm::Constant *EnumerationMutationFn =
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CGM.getObjCRuntime().EnumerationMutationFunction();
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llvm::Value *DeclAddress;
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QualType ElementTy;
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if (!EnumerationMutationFn) {
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CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime");
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return;
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}
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if (const DeclStmt *SD = dyn_cast<DeclStmt>(S.getElement())) {
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EmitStmt(SD);
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assert(HaveInsertPoint() && "DeclStmt destroyed insert point!");
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const Decl* D = SD->getSingleDecl();
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ElementTy = cast<ValueDecl>(D)->getType();
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DeclAddress = LocalDeclMap[D];
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} else {
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ElementTy = cast<Expr>(S.getElement())->getType();
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DeclAddress = 0;
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}
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// Fast enumeration state.
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QualType StateTy = getContext().getObjCFastEnumerationStateType();
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llvm::AllocaInst *StatePtr = CreateTempAlloca(ConvertType(StateTy),
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"state.ptr");
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StatePtr->setAlignment(getContext().getTypeAlign(StateTy) >> 3);
|
|
EmitMemSetToZero(StatePtr, StateTy);
|
|
|
|
// Number of elements in the items array.
|
|
static const unsigned NumItems = 16;
|
|
|
|
// Get selector
|
|
llvm::SmallVector<IdentifierInfo*, 3> II;
|
|
II.push_back(&CGM.getContext().Idents.get("countByEnumeratingWithState"));
|
|
II.push_back(&CGM.getContext().Idents.get("objects"));
|
|
II.push_back(&CGM.getContext().Idents.get("count"));
|
|
Selector FastEnumSel = CGM.getContext().Selectors.getSelector(II.size(),
|
|
&II[0]);
|
|
|
|
QualType ItemsTy =
|
|
getContext().getConstantArrayType(getContext().getObjCIdType(),
|
|
llvm::APInt(32, NumItems),
|
|
ArrayType::Normal, 0);
|
|
llvm::Value *ItemsPtr = CreateTempAlloca(ConvertType(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,
|
|
getContext().UnsignedLongTy,
|
|
FastEnumSel,
|
|
Collection, false, Args);
|
|
|
|
llvm::Value *LimitPtr = CreateTempAlloca(UnsignedLongLTy, "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 =
|
|
CreateTempAlloca(UnsignedLongLTy);
|
|
|
|
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 = CreateTempAlloca(UnsignedLongLTy, "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),
|
|
EnumerationMutationFn, 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);
|
|
|
|
llvm::BasicBlock *LoopEnd = createBasicBlock("loopend");
|
|
llvm::BasicBlock *AfterBody = createBasicBlock("afterbody");
|
|
|
|
BreakContinueStack.push_back(BreakContinue(LoopEnd, AfterBody));
|
|
|
|
EmitStmt(S.getBody());
|
|
|
|
BreakContinueStack.pop_back();
|
|
|
|
EmitBlock(AfterBody);
|
|
|
|
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,
|
|
getContext().UnsignedLongTy,
|
|
FastEnumSel,
|
|
Collection, false, 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);
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCAtTryStmt(const ObjCAtTryStmt &S)
|
|
{
|
|
CGM.getObjCRuntime().EmitTryOrSynchronizedStmt(*this, S);
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCAtThrowStmt(const ObjCAtThrowStmt &S)
|
|
{
|
|
CGM.getObjCRuntime().EmitThrowStmt(*this, S);
|
|
}
|
|
|
|
void CodeGenFunction::EmitObjCAtSynchronizedStmt(
|
|
const ObjCAtSynchronizedStmt &S)
|
|
{
|
|
CGM.getObjCRuntime().EmitTryOrSynchronizedStmt(*this, S);
|
|
}
|
|
|
|
CGObjCRuntime::~CGObjCRuntime() {}
|