//===--- CGExprComplex.cpp - Emit LLVM Code for Complex Exprs -------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This contains code to emit Expr nodes with complex types as LLVM code. // //===----------------------------------------------------------------------===// #include "CodeGenFunction.h" #include "CodeGenModule.h" #include "clang/AST/ASTContext.h" #include "clang/AST/StmtVisitor.h" #include "llvm/Constants.h" #include "llvm/Function.h" #include "llvm/ADT/SmallString.h" using namespace clang; using namespace CodeGen; //===----------------------------------------------------------------------===// // Complex Expression Emitter //===----------------------------------------------------------------------===// typedef CodeGenFunction::ComplexPairTy ComplexPairTy; namespace { class ComplexExprEmitter : public StmtVisitor { CodeGenFunction &CGF; CGBuilderTy &Builder; // True is we should ignore the value of a bool IgnoreReal; bool IgnoreImag; // True if we should ignore the value of a=b bool IgnoreRealAssign; bool IgnoreImagAssign; public: ComplexExprEmitter(CodeGenFunction &cgf, bool ir=false, bool ii=false, bool irn=false, bool iin=false) : CGF(cgf), Builder(CGF.Builder), IgnoreReal(ir), IgnoreImag(ii), IgnoreRealAssign(irn), IgnoreImagAssign(iin) { } //===--------------------------------------------------------------------===// // Utilities //===--------------------------------------------------------------------===// bool TestAndClearIgnoreReal() { bool I = IgnoreReal; IgnoreReal = false; return I; } bool TestAndClearIgnoreImag() { bool I = IgnoreImag; IgnoreImag = false; return I; } bool TestAndClearIgnoreRealAssign() { bool I = IgnoreRealAssign; IgnoreRealAssign = false; return I; } bool TestAndClearIgnoreImagAssign() { bool I = IgnoreImagAssign; IgnoreImagAssign = false; return I; } /// EmitLoadOfLValue - Given an expression with complex type that represents a /// value l-value, this method emits the address of the l-value, then loads /// and returns the result. ComplexPairTy EmitLoadOfLValue(const Expr *E) { LValue LV = CGF.EmitLValue(E); if (LV.isSimple()) return EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified()); if (LV.isPropertyRef()) return CGF.EmitObjCPropertyGet(LV.getPropertyRefExpr()).getComplexVal(); assert(LV.isKVCRef() && "Unknown LValue type!"); return CGF.EmitObjCPropertyGet(LV.getKVCRefExpr()).getComplexVal(); } /// EmitLoadOfComplex - Given a pointer to a complex value, emit code to load /// the real and imaginary pieces. ComplexPairTy EmitLoadOfComplex(llvm::Value *SrcPtr, bool isVolatile); /// EmitStoreOfComplex - Store the specified real/imag parts into the /// specified value pointer. void EmitStoreOfComplex(ComplexPairTy Val, llvm::Value *ResPtr, bool isVol); /// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType. ComplexPairTy EmitComplexToComplexCast(ComplexPairTy Val, QualType SrcType, QualType DestType); //===--------------------------------------------------------------------===// // Visitor Methods //===--------------------------------------------------------------------===// ComplexPairTy VisitStmt(Stmt *S) { S->dump(CGF.getContext().getSourceManager()); assert(0 && "Stmt can't have complex result type!"); return ComplexPairTy(); } ComplexPairTy VisitExpr(Expr *S); ComplexPairTy VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr());} ComplexPairTy VisitImaginaryLiteral(const ImaginaryLiteral *IL); // l-values. ComplexPairTy VisitDeclRefExpr(const Expr *E) { return EmitLoadOfLValue(E); } ComplexPairTy VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) { return EmitLoadOfLValue(E); } ComplexPairTy VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) { return EmitLoadOfLValue(E); } ComplexPairTy VisitObjCImplicitSetterGetterRefExpr( ObjCImplicitSetterGetterRefExpr *E) { return EmitLoadOfLValue(E); } ComplexPairTy VisitObjCMessageExpr(ObjCMessageExpr *E) { return CGF.EmitObjCMessageExpr(E).getComplexVal(); } ComplexPairTy VisitArraySubscriptExpr(Expr *E) { return EmitLoadOfLValue(E); } ComplexPairTy VisitMemberExpr(const Expr *E) { return EmitLoadOfLValue(E); } // FIXME: CompoundLiteralExpr ComplexPairTy EmitCast(CastExpr::CastKind CK, Expr *Op, QualType DestTy); ComplexPairTy VisitImplicitCastExpr(ImplicitCastExpr *E) { // Unlike for scalars, we don't have to worry about function->ptr demotion // here. return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType()); } ComplexPairTy VisitCastExpr(CastExpr *E) { return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType()); } ComplexPairTy VisitCallExpr(const CallExpr *E); ComplexPairTy VisitStmtExpr(const StmtExpr *E); // Operators. ComplexPairTy VisitPrePostIncDec(const UnaryOperator *E, bool isInc, bool isPre) { LValue LV = CGF.EmitLValue(E->getSubExpr()); return CGF.EmitComplexPrePostIncDec(E, LV, isInc, isPre); } ComplexPairTy VisitUnaryPostDec(const UnaryOperator *E) { return VisitPrePostIncDec(E, false, false); } ComplexPairTy VisitUnaryPostInc(const UnaryOperator *E) { return VisitPrePostIncDec(E, true, false); } ComplexPairTy VisitUnaryPreDec(const UnaryOperator *E) { return VisitPrePostIncDec(E, false, true); } ComplexPairTy VisitUnaryPreInc(const UnaryOperator *E) { return VisitPrePostIncDec(E, true, true); } ComplexPairTy VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); } ComplexPairTy VisitUnaryPlus (const UnaryOperator *E) { TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); TestAndClearIgnoreRealAssign(); TestAndClearIgnoreImagAssign(); return Visit(E->getSubExpr()); } ComplexPairTy VisitUnaryMinus (const UnaryOperator *E); ComplexPairTy VisitUnaryNot (const UnaryOperator *E); // LNot,Real,Imag never return complex. ComplexPairTy VisitUnaryExtension(const UnaryOperator *E) { return Visit(E->getSubExpr()); } ComplexPairTy VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { return Visit(DAE->getExpr()); } ComplexPairTy VisitCXXExprWithTemporaries(CXXExprWithTemporaries *E) { return CGF.EmitCXXExprWithTemporaries(E).getComplexVal(); } ComplexPairTy VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) { assert(E->getType()->isAnyComplexType() && "Expected complex type!"); QualType Elem = E->getType()->getAs()->getElementType(); llvm::Constant *Null = llvm::Constant::getNullValue(CGF.ConvertType(Elem)); return ComplexPairTy(Null, Null); } ComplexPairTy VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) { assert(E->getType()->isAnyComplexType() && "Expected complex type!"); QualType Elem = E->getType()->getAs()->getElementType(); llvm::Constant *Null = llvm::Constant::getNullValue(CGF.ConvertType(Elem)); return ComplexPairTy(Null, Null); } struct BinOpInfo { ComplexPairTy LHS; ComplexPairTy RHS; QualType Ty; // Computation Type. }; BinOpInfo EmitBinOps(const BinaryOperator *E); ComplexPairTy EmitCompoundAssign(const CompoundAssignOperator *E, ComplexPairTy (ComplexExprEmitter::*Func) (const BinOpInfo &)); ComplexPairTy EmitBinAdd(const BinOpInfo &Op); ComplexPairTy EmitBinSub(const BinOpInfo &Op); ComplexPairTy EmitBinMul(const BinOpInfo &Op); ComplexPairTy EmitBinDiv(const BinOpInfo &Op); ComplexPairTy VisitBinMul(const BinaryOperator *E) { return EmitBinMul(EmitBinOps(E)); } ComplexPairTy VisitBinAdd(const BinaryOperator *E) { return EmitBinAdd(EmitBinOps(E)); } ComplexPairTy VisitBinSub(const BinaryOperator *E) { return EmitBinSub(EmitBinOps(E)); } ComplexPairTy VisitBinDiv(const BinaryOperator *E) { return EmitBinDiv(EmitBinOps(E)); } // Compound assignments. ComplexPairTy VisitBinAddAssign(const CompoundAssignOperator *E) { return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinAdd); } ComplexPairTy VisitBinSubAssign(const CompoundAssignOperator *E) { return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinSub); } ComplexPairTy VisitBinMulAssign(const CompoundAssignOperator *E) { return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinMul); } ComplexPairTy VisitBinDivAssign(const CompoundAssignOperator *E) { return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinDiv); } // GCC rejects rem/and/or/xor for integer complex. // Logical and/or always return int, never complex. // No comparisons produce a complex result. ComplexPairTy VisitBinAssign (const BinaryOperator *E); ComplexPairTy VisitBinComma (const BinaryOperator *E); ComplexPairTy VisitConditionalOperator(const ConditionalOperator *CO); ComplexPairTy VisitChooseExpr(ChooseExpr *CE); ComplexPairTy VisitInitListExpr(InitListExpr *E); ComplexPairTy VisitVAArgExpr(VAArgExpr *E); }; } // end anonymous namespace. //===----------------------------------------------------------------------===// // Utilities //===----------------------------------------------------------------------===// /// EmitLoadOfComplex - Given an RValue reference for a complex, emit code to /// load the real and imaginary pieces, returning them as Real/Imag. ComplexPairTy ComplexExprEmitter::EmitLoadOfComplex(llvm::Value *SrcPtr, bool isVolatile) { llvm::Value *Real=0, *Imag=0; if (!IgnoreReal) { llvm::Value *RealP = Builder.CreateStructGEP(SrcPtr, 0, SrcPtr->getName() + ".realp"); Real = Builder.CreateLoad(RealP, isVolatile, SrcPtr->getName() + ".real"); } if (!IgnoreImag) { llvm::Value *ImagP = Builder.CreateStructGEP(SrcPtr, 1, SrcPtr->getName() + ".imagp"); Imag = Builder.CreateLoad(ImagP, isVolatile, SrcPtr->getName() + ".imag"); } return ComplexPairTy(Real, Imag); } /// EmitStoreOfComplex - Store the specified real/imag parts into the /// specified value pointer. void ComplexExprEmitter::EmitStoreOfComplex(ComplexPairTy Val, llvm::Value *Ptr, bool isVolatile) { llvm::Value *RealPtr = Builder.CreateStructGEP(Ptr, 0, "real"); llvm::Value *ImagPtr = Builder.CreateStructGEP(Ptr, 1, "imag"); Builder.CreateStore(Val.first, RealPtr, isVolatile); Builder.CreateStore(Val.second, ImagPtr, isVolatile); } //===----------------------------------------------------------------------===// // Visitor Methods //===----------------------------------------------------------------------===// ComplexPairTy ComplexExprEmitter::VisitExpr(Expr *E) { CGF.ErrorUnsupported(E, "complex expression"); const llvm::Type *EltTy = CGF.ConvertType(E->getType()->getAs()->getElementType()); llvm::Value *U = llvm::UndefValue::get(EltTy); return ComplexPairTy(U, U); } ComplexPairTy ComplexExprEmitter:: VisitImaginaryLiteral(const ImaginaryLiteral *IL) { llvm::Value *Imag = CGF.EmitScalarExpr(IL->getSubExpr()); return ComplexPairTy(llvm::Constant::getNullValue(Imag->getType()), Imag); } ComplexPairTy ComplexExprEmitter::VisitCallExpr(const CallExpr *E) { if (E->getCallReturnType()->isReferenceType()) return EmitLoadOfLValue(E); return CGF.EmitCallExpr(E).getComplexVal(); } ComplexPairTy ComplexExprEmitter::VisitStmtExpr(const StmtExpr *E) { return CGF.EmitCompoundStmt(*E->getSubStmt(), true).getComplexVal(); } /// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType. ComplexPairTy ComplexExprEmitter::EmitComplexToComplexCast(ComplexPairTy Val, QualType SrcType, QualType DestType) { // Get the src/dest element type. SrcType = SrcType->getAs()->getElementType(); DestType = DestType->getAs()->getElementType(); // C99 6.3.1.6: When a value of complex type is converted to another // complex type, both the real and imaginary parts follow the conversion // rules for the corresponding real types. Val.first = CGF.EmitScalarConversion(Val.first, SrcType, DestType); Val.second = CGF.EmitScalarConversion(Val.second, SrcType, DestType); return Val; } ComplexPairTy ComplexExprEmitter::EmitCast(CastExpr::CastKind CK, Expr *Op, QualType DestTy) { // Two cases here: cast from (complex to complex) and (scalar to complex). if (Op->getType()->isAnyComplexType()) return EmitComplexToComplexCast(Visit(Op), Op->getType(), DestTy); // FIXME: We should be looking at all of the cast kinds here, not // cherry-picking the ones we have test cases for. if (CK == CastExpr::CK_LValueBitCast) { llvm::Value *V = CGF.EmitLValue(Op).getAddress(); V = Builder.CreateBitCast(V, CGF.ConvertType(CGF.getContext().getPointerType(DestTy))); // FIXME: Are the qualifiers correct here? return EmitLoadOfComplex(V, DestTy.isVolatileQualified()); } // C99 6.3.1.7: When a value of real type is converted to a complex type, the // real part of the complex result value is determined by the rules of // conversion to the corresponding real type and the imaginary part of the // complex result value is a positive zero or an unsigned zero. llvm::Value *Elt = CGF.EmitScalarExpr(Op); // Convert the input element to the element type of the complex. DestTy = DestTy->getAs()->getElementType(); Elt = CGF.EmitScalarConversion(Elt, Op->getType(), DestTy); // Return (realval, 0). return ComplexPairTy(Elt, llvm::Constant::getNullValue(Elt->getType())); } ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) { TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); TestAndClearIgnoreRealAssign(); TestAndClearIgnoreImagAssign(); ComplexPairTy Op = Visit(E->getSubExpr()); llvm::Value *ResR, *ResI; if (Op.first->getType()->isFloatingPointTy()) { ResR = Builder.CreateFNeg(Op.first, "neg.r"); ResI = Builder.CreateFNeg(Op.second, "neg.i"); } else { ResR = Builder.CreateNeg(Op.first, "neg.r"); ResI = Builder.CreateNeg(Op.second, "neg.i"); } return ComplexPairTy(ResR, ResI); } ComplexPairTy ComplexExprEmitter::VisitUnaryNot(const UnaryOperator *E) { TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); TestAndClearIgnoreRealAssign(); TestAndClearIgnoreImagAssign(); // ~(a+ib) = a + i*-b ComplexPairTy Op = Visit(E->getSubExpr()); llvm::Value *ResI; if (Op.second->getType()->isFloatingPointTy()) ResI = Builder.CreateFNeg(Op.second, "conj.i"); else ResI = Builder.CreateNeg(Op.second, "conj.i"); return ComplexPairTy(Op.first, ResI); } ComplexPairTy ComplexExprEmitter::EmitBinAdd(const BinOpInfo &Op) { llvm::Value *ResR, *ResI; if (Op.LHS.first->getType()->isFloatingPointTy()) { ResR = Builder.CreateFAdd(Op.LHS.first, Op.RHS.first, "add.r"); ResI = Builder.CreateFAdd(Op.LHS.second, Op.RHS.second, "add.i"); } else { ResR = Builder.CreateAdd(Op.LHS.first, Op.RHS.first, "add.r"); ResI = Builder.CreateAdd(Op.LHS.second, Op.RHS.second, "add.i"); } return ComplexPairTy(ResR, ResI); } ComplexPairTy ComplexExprEmitter::EmitBinSub(const BinOpInfo &Op) { llvm::Value *ResR, *ResI; if (Op.LHS.first->getType()->isFloatingPointTy()) { ResR = Builder.CreateFSub(Op.LHS.first, Op.RHS.first, "sub.r"); ResI = Builder.CreateFSub(Op.LHS.second, Op.RHS.second, "sub.i"); } else { ResR = Builder.CreateSub(Op.LHS.first, Op.RHS.first, "sub.r"); ResI = Builder.CreateSub(Op.LHS.second, Op.RHS.second, "sub.i"); } return ComplexPairTy(ResR, ResI); } ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) { using llvm::Value; Value *ResR, *ResI; if (Op.LHS.first->getType()->isFloatingPointTy()) { Value *ResRl = Builder.CreateFMul(Op.LHS.first, Op.RHS.first, "mul.rl"); Value *ResRr = Builder.CreateFMul(Op.LHS.second, Op.RHS.second,"mul.rr"); ResR = Builder.CreateFSub(ResRl, ResRr, "mul.r"); Value *ResIl = Builder.CreateFMul(Op.LHS.second, Op.RHS.first, "mul.il"); Value *ResIr = Builder.CreateFMul(Op.LHS.first, Op.RHS.second, "mul.ir"); ResI = Builder.CreateFAdd(ResIl, ResIr, "mul.i"); } else { Value *ResRl = Builder.CreateMul(Op.LHS.first, Op.RHS.first, "mul.rl"); Value *ResRr = Builder.CreateMul(Op.LHS.second, Op.RHS.second,"mul.rr"); ResR = Builder.CreateSub(ResRl, ResRr, "mul.r"); Value *ResIl = Builder.CreateMul(Op.LHS.second, Op.RHS.first, "mul.il"); Value *ResIr = Builder.CreateMul(Op.LHS.first, Op.RHS.second, "mul.ir"); ResI = Builder.CreateAdd(ResIl, ResIr, "mul.i"); } return ComplexPairTy(ResR, ResI); } ComplexPairTy ComplexExprEmitter::EmitBinDiv(const BinOpInfo &Op) { llvm::Value *LHSr = Op.LHS.first, *LHSi = Op.LHS.second; llvm::Value *RHSr = Op.RHS.first, *RHSi = Op.RHS.second; llvm::Value *DSTr, *DSTi; if (Op.LHS.first->getType()->isFloatingPointTy()) { // (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd)) llvm::Value *Tmp1 = Builder.CreateFMul(LHSr, RHSr, "tmp"); // a*c llvm::Value *Tmp2 = Builder.CreateFMul(LHSi, RHSi, "tmp"); // b*d llvm::Value *Tmp3 = Builder.CreateFAdd(Tmp1, Tmp2, "tmp"); // ac+bd llvm::Value *Tmp4 = Builder.CreateFMul(RHSr, RHSr, "tmp"); // c*c llvm::Value *Tmp5 = Builder.CreateFMul(RHSi, RHSi, "tmp"); // d*d llvm::Value *Tmp6 = Builder.CreateFAdd(Tmp4, Tmp5, "tmp"); // cc+dd llvm::Value *Tmp7 = Builder.CreateFMul(LHSi, RHSr, "tmp"); // b*c llvm::Value *Tmp8 = Builder.CreateFMul(LHSr, RHSi, "tmp"); // a*d llvm::Value *Tmp9 = Builder.CreateFSub(Tmp7, Tmp8, "tmp"); // bc-ad DSTr = Builder.CreateFDiv(Tmp3, Tmp6, "tmp"); DSTi = Builder.CreateFDiv(Tmp9, Tmp6, "tmp"); } else { // (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd)) llvm::Value *Tmp1 = Builder.CreateMul(LHSr, RHSr, "tmp"); // a*c llvm::Value *Tmp2 = Builder.CreateMul(LHSi, RHSi, "tmp"); // b*d llvm::Value *Tmp3 = Builder.CreateAdd(Tmp1, Tmp2, "tmp"); // ac+bd llvm::Value *Tmp4 = Builder.CreateMul(RHSr, RHSr, "tmp"); // c*c llvm::Value *Tmp5 = Builder.CreateMul(RHSi, RHSi, "tmp"); // d*d llvm::Value *Tmp6 = Builder.CreateAdd(Tmp4, Tmp5, "tmp"); // cc+dd llvm::Value *Tmp7 = Builder.CreateMul(LHSi, RHSr, "tmp"); // b*c llvm::Value *Tmp8 = Builder.CreateMul(LHSr, RHSi, "tmp"); // a*d llvm::Value *Tmp9 = Builder.CreateSub(Tmp7, Tmp8, "tmp"); // bc-ad if (Op.Ty->getAs()->getElementType()->isUnsignedIntegerType()) { DSTr = Builder.CreateUDiv(Tmp3, Tmp6, "tmp"); DSTi = Builder.CreateUDiv(Tmp9, Tmp6, "tmp"); } else { DSTr = Builder.CreateSDiv(Tmp3, Tmp6, "tmp"); DSTi = Builder.CreateSDiv(Tmp9, Tmp6, "tmp"); } } return ComplexPairTy(DSTr, DSTi); } ComplexExprEmitter::BinOpInfo ComplexExprEmitter::EmitBinOps(const BinaryOperator *E) { TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); TestAndClearIgnoreRealAssign(); TestAndClearIgnoreImagAssign(); BinOpInfo Ops; Ops.LHS = Visit(E->getLHS()); Ops.RHS = Visit(E->getRHS()); Ops.Ty = E->getType(); return Ops; } // Compound assignments. ComplexPairTy ComplexExprEmitter:: EmitCompoundAssign(const CompoundAssignOperator *E, ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&)){ TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); bool ignreal = TestAndClearIgnoreRealAssign(); bool ignimag = TestAndClearIgnoreImagAssign(); QualType LHSTy = E->getLHS()->getType(), RHSTy = E->getRHS()->getType(); BinOpInfo OpInfo; // Load the RHS and LHS operands. // __block variables need to have the rhs evaluated first, plus this should // improve codegen a little. It is possible for the RHS to be complex or // scalar. OpInfo.Ty = E->getComputationResultType(); OpInfo.RHS = EmitCast(CastExpr::CK_Unknown, E->getRHS(), OpInfo.Ty); LValue LHS = CGF.EmitLValue(E->getLHS()); // We know the LHS is a complex lvalue. ComplexPairTy LHSComplexPair; if (LHS.isPropertyRef()) LHSComplexPair = CGF.EmitObjCPropertyGet(LHS.getPropertyRefExpr()).getComplexVal(); else if (LHS.isKVCRef()) LHSComplexPair = CGF.EmitObjCPropertyGet(LHS.getKVCRefExpr()).getComplexVal(); else LHSComplexPair = EmitLoadOfComplex(LHS.getAddress(), LHS.isVolatileQualified()); OpInfo.LHS = EmitComplexToComplexCast(LHSComplexPair, LHSTy, OpInfo.Ty); // Expand the binary operator. ComplexPairTy Result = (this->*Func)(OpInfo); // Truncate the result back to the LHS type. Result = EmitComplexToComplexCast(Result, OpInfo.Ty, LHSTy); // Store the result value into the LHS lvalue. if (LHS.isPropertyRef()) CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), RValue::getComplex(Result)); else if (LHS.isKVCRef()) CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), RValue::getComplex(Result)); else EmitStoreOfComplex(Result, LHS.getAddress(), LHS.isVolatileQualified()); // Restore the Ignore* flags. IgnoreReal = ignreal; IgnoreImag = ignimag; IgnoreRealAssign = ignreal; IgnoreImagAssign = ignimag; // Objective-C property assignment never reloads the value following a store. if (LHS.isPropertyRef() || LHS.isKVCRef()) return Result; // Otherwise, reload the value. return EmitLoadOfComplex(LHS.getAddress(), LHS.isVolatileQualified()); } ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) { TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); bool ignreal = TestAndClearIgnoreRealAssign(); bool ignimag = TestAndClearIgnoreImagAssign(); assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(), E->getRHS()->getType()) && "Invalid assignment"); // Emit the RHS. ComplexPairTy Val = Visit(E->getRHS()); // Compute the address to store into. LValue LHS = CGF.EmitLValue(E->getLHS()); // Store the result value into the LHS lvalue. if (LHS.isPropertyRef()) CGF.EmitObjCPropertySet(LHS.getPropertyRefExpr(), RValue::getComplex(Val)); else if (LHS.isKVCRef()) CGF.EmitObjCPropertySet(LHS.getKVCRefExpr(), RValue::getComplex(Val)); else EmitStoreOfComplex(Val, LHS.getAddress(), LHS.isVolatileQualified()); // Restore the Ignore* flags. IgnoreReal = ignreal; IgnoreImag = ignimag; IgnoreRealAssign = ignreal; IgnoreImagAssign = ignimag; // Objective-C property assignment never reloads the value following a store. if (LHS.isPropertyRef() || LHS.isKVCRef()) return Val; // Otherwise, reload the value. return EmitLoadOfComplex(LHS.getAddress(), LHS.isVolatileQualified()); } ComplexPairTy ComplexExprEmitter::VisitBinComma(const BinaryOperator *E) { CGF.EmitStmt(E->getLHS()); CGF.EnsureInsertPoint(); return Visit(E->getRHS()); } ComplexPairTy ComplexExprEmitter:: VisitConditionalOperator(const ConditionalOperator *E) { if (!E->getLHS()) { CGF.ErrorUnsupported(E, "conditional operator with missing LHS"); const llvm::Type *EltTy = CGF.ConvertType(E->getType()->getAs()->getElementType()); llvm::Value *U = llvm::UndefValue::get(EltTy); return ComplexPairTy(U, U); } TestAndClearIgnoreReal(); TestAndClearIgnoreImag(); TestAndClearIgnoreRealAssign(); TestAndClearIgnoreImagAssign(); llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true"); llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false"); llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end"); CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock); CGF.EmitBlock(LHSBlock); // Handle the GNU extension for missing LHS. assert(E->getLHS() && "Must have LHS for complex value"); ComplexPairTy LHS = Visit(E->getLHS()); LHSBlock = Builder.GetInsertBlock(); CGF.EmitBranch(ContBlock); CGF.EmitBlock(RHSBlock); ComplexPairTy RHS = Visit(E->getRHS()); RHSBlock = Builder.GetInsertBlock(); CGF.EmitBranch(ContBlock); CGF.EmitBlock(ContBlock); // Create a PHI node for the real part. llvm::PHINode *RealPN = Builder.CreatePHI(LHS.first->getType(), "cond.r"); RealPN->reserveOperandSpace(2); RealPN->addIncoming(LHS.first, LHSBlock); RealPN->addIncoming(RHS.first, RHSBlock); // Create a PHI node for the imaginary part. llvm::PHINode *ImagPN = Builder.CreatePHI(LHS.first->getType(), "cond.i"); ImagPN->reserveOperandSpace(2); ImagPN->addIncoming(LHS.second, LHSBlock); ImagPN->addIncoming(RHS.second, RHSBlock); return ComplexPairTy(RealPN, ImagPN); } ComplexPairTy ComplexExprEmitter::VisitChooseExpr(ChooseExpr *E) { return Visit(E->getChosenSubExpr(CGF.getContext())); } ComplexPairTy ComplexExprEmitter::VisitInitListExpr(InitListExpr *E) { bool Ignore = TestAndClearIgnoreReal(); (void)Ignore; assert (Ignore == false && "init list ignored"); Ignore = TestAndClearIgnoreImag(); (void)Ignore; assert (Ignore == false && "init list ignored"); if (E->getNumInits()) return Visit(E->getInit(0)); // Empty init list intializes to null QualType Ty = E->getType()->getAs()->getElementType(); const llvm::Type* LTy = CGF.ConvertType(Ty); llvm::Value* zeroConstant = llvm::Constant::getNullValue(LTy); return ComplexPairTy(zeroConstant, zeroConstant); } ComplexPairTy ComplexExprEmitter::VisitVAArgExpr(VAArgExpr *E) { llvm::Value *ArgValue = CGF.EmitVAListRef(E->getSubExpr()); llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, E->getType()); if (!ArgPtr) { CGF.ErrorUnsupported(E, "complex va_arg expression"); const llvm::Type *EltTy = CGF.ConvertType(E->getType()->getAs()->getElementType()); llvm::Value *U = llvm::UndefValue::get(EltTy); return ComplexPairTy(U, U); } // FIXME Volatility. return EmitLoadOfComplex(ArgPtr, false); } //===----------------------------------------------------------------------===// // Entry Point into this File //===----------------------------------------------------------------------===// /// EmitComplexExpr - Emit the computation of the specified expression of /// complex type, ignoring the result. ComplexPairTy CodeGenFunction::EmitComplexExpr(const Expr *E, bool IgnoreReal, bool IgnoreImag, bool IgnoreRealAssign, bool IgnoreImagAssign) { assert(E && E->getType()->isAnyComplexType() && "Invalid complex expression to emit"); return ComplexExprEmitter(*this, IgnoreReal, IgnoreImag, IgnoreRealAssign, IgnoreImagAssign) .Visit(const_cast(E)); } /// EmitComplexExprIntoAddr - Emit the computation of the specified expression /// of complex type, storing into the specified Value*. void CodeGenFunction::EmitComplexExprIntoAddr(const Expr *E, llvm::Value *DestAddr, bool DestIsVolatile) { assert(E && E->getType()->isAnyComplexType() && "Invalid complex expression to emit"); ComplexExprEmitter Emitter(*this); ComplexPairTy Val = Emitter.Visit(const_cast(E)); Emitter.EmitStoreOfComplex(Val, DestAddr, DestIsVolatile); } /// StoreComplexToAddr - Store a complex number into the specified address. void CodeGenFunction::StoreComplexToAddr(ComplexPairTy V, llvm::Value *DestAddr, bool DestIsVolatile) { ComplexExprEmitter(*this).EmitStoreOfComplex(V, DestAddr, DestIsVolatile); } /// LoadComplexFromAddr - Load a complex number from the specified address. ComplexPairTy CodeGenFunction::LoadComplexFromAddr(llvm::Value *SrcAddr, bool SrcIsVolatile) { return ComplexExprEmitter(*this).EmitLoadOfComplex(SrcAddr, SrcIsVolatile); }