| //===--- 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/AST.h" |
| #include "llvm/Constants.h" |
| #include "llvm/Function.h" |
| #include "llvm/ADT/SmallString.h" |
| #include "llvm/Support/Compiler.h" |
| using namespace clang; |
| using namespace CodeGen; |
| |
| //===----------------------------------------------------------------------===// |
| // Complex Expression Emitter |
| //===----------------------------------------------------------------------===// |
| |
| typedef CodeGenFunction::ComplexPairTy ComplexPairTy; |
| |
| namespace { |
| class VISIBILITY_HIDDEN ComplexExprEmitter |
| : public StmtVisitor<ComplexExprEmitter, ComplexPairTy> { |
| CodeGenFunction &CGF; |
| llvm::IRBuilder &Builder; |
| public: |
| ComplexExprEmitter(CodeGenFunction &cgf) : CGF(cgf), Builder(CGF.Builder) { |
| } |
| |
| |
| //===--------------------------------------------------------------------===// |
| // Utilities |
| //===--------------------------------------------------------------------===// |
| |
| /// 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); |
| // FIXME: Volatile |
| return EmitLoadOfComplex(LV.getAddress(), false); |
| } |
| |
| /// 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 VisitArraySubscriptExpr(Expr *E) { return EmitLoadOfLValue(E); } |
| ComplexPairTy VisitMemberExpr(const Expr *E) { return EmitLoadOfLValue(E); } |
| |
| // FIXME: CompoundLiteralExpr |
| |
| ComplexPairTy EmitCast(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->getSubExpr(), E->getType()); |
| } |
| ComplexPairTy VisitCastExpr(CastExpr *E) { |
| return EmitCast(E->getSubExpr(), E->getType()); |
| } |
| ComplexPairTy VisitCallExpr(const CallExpr *E); |
| ComplexPairTy VisitStmtExpr(const StmtExpr *E); |
| ComplexPairTy VisitOverloadExpr(const OverloadExpr *OE); |
| |
| // Operators. |
| ComplexPairTy VisitPrePostIncDec(const UnaryOperator *E, |
| bool isInc, bool 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) { |
| return Visit(E->getSubExpr()); |
| } |
| ComplexPairTy VisitUnaryMinus (const UnaryOperator *E); |
| ComplexPairTy VisitUnaryNot (const UnaryOperator *E); |
| // LNot,SizeOf,AlignOf,Real,Imag never return complex. |
| ComplexPairTy VisitUnaryExtension(const UnaryOperator *E) { |
| return Visit(E->getSubExpr()); |
| } |
| ComplexPairTy VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) { |
| return Visit(DAE->getExpr()); |
| } |
| |
| 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); |
| }; |
| } // 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::SmallString<64> Name(SrcPtr->getNameStart(), |
| SrcPtr->getNameStart()+SrcPtr->getNameLen()); |
| |
| Name += ".realp"; |
| llvm::Value *RealPtr = Builder.CreateStructGEP(SrcPtr, 0, Name.c_str()); |
| |
| Name.pop_back(); // .realp -> .real |
| llvm::Value *Real = Builder.CreateLoad(RealPtr, isVolatile, Name.c_str()); |
| |
| Name.resize(Name.size()-4); // .real -> .imagp |
| Name += "imagp"; |
| |
| llvm::Value *ImagPtr = Builder.CreateStructGEP(SrcPtr, 1, Name.c_str()); |
| |
| Name.pop_back(); // .imagp -> .imag |
| llvm::Value *Imag = Builder.CreateLoad(ImagPtr, isVolatile, Name.c_str()); |
| 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.WarnUnsupported(E, "complex expression"); |
| const llvm::Type *EltTy = |
| CGF.ConvertType(E->getType()->getAsComplexType()->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) { |
| return CGF.EmitCallExpr(E).getComplexVal(); |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitOverloadExpr(const OverloadExpr *E) { |
| return CGF.EmitCallExpr(E->getFn(), E->arg_begin(), |
| E->arg_end(CGF.getContext())).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 = cast<ComplexType>(SrcType.getCanonicalType())->getElementType(); |
| DestType = cast<ComplexType>(DestType.getCanonicalType())->getElementType(); |
| |
| // C99 6.3.1.6: When a value of complextype is converted to another |
| // complex type, both the real and imaginary parts followthe 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(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); |
| |
| // 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 = cast<ComplexType>(DestTy.getCanonicalType())->getElementType(); |
| Elt = CGF.EmitScalarConversion(Elt, Op->getType(), DestTy); |
| |
| // Return (realval, 0). |
| return ComplexPairTy(Elt, llvm::Constant::getNullValue(Elt->getType())); |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitPrePostIncDec(const UnaryOperator *E, |
| bool isInc, bool isPre) { |
| LValue LV = CGF.EmitLValue(E->getSubExpr()); |
| // FIXME: Handle volatile! |
| ComplexPairTy InVal = EmitLoadOfComplex(LV.getAddress(), false); |
| |
| uint64_t AmountVal = isInc ? 1 : -1; |
| |
| llvm::Value *NextVal; |
| if (isa<llvm::IntegerType>(InVal.first->getType())) |
| NextVal = llvm::ConstantInt::get(InVal.first->getType(), AmountVal); |
| else if (InVal.first->getType() == llvm::Type::FloatTy) |
| // FIXME: Handle long double. |
| NextVal = |
| llvm::ConstantFP::get(llvm::APFloat(static_cast<float>(AmountVal))); |
| else { |
| // FIXME: Handle long double. |
| assert(InVal.first->getType() == llvm::Type::DoubleTy); |
| NextVal = |
| llvm::ConstantFP::get(llvm::APFloat(static_cast<double>(AmountVal))); |
| } |
| |
| // Add the inc/dec to the real part. |
| NextVal = Builder.CreateAdd(InVal.first, NextVal, isInc ? "inc" : "dec"); |
| |
| ComplexPairTy IncVal(NextVal, InVal.second); |
| |
| // Store the updated result through the lvalue. |
| EmitStoreOfComplex(IncVal, LV.getAddress(), false); /* FIXME: Volatile */ |
| |
| // If this is a postinc, return the value read from memory, otherwise use the |
| // updated value. |
| return isPre ? IncVal : InVal; |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) { |
| ComplexPairTy Op = Visit(E->getSubExpr()); |
| llvm::Value *ResR = Builder.CreateNeg(Op.first, "neg.r"); |
| llvm::Value *ResI = Builder.CreateNeg(Op.second, "neg.i"); |
| return ComplexPairTy(ResR, ResI); |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitUnaryNot(const UnaryOperator *E) { |
| // ~(a+ib) = a + i*-b |
| ComplexPairTy Op = Visit(E->getSubExpr()); |
| llvm::Value *ResI = Builder.CreateNeg(Op.second, "conj.i"); |
| return ComplexPairTy(Op.first, ResI); |
| } |
| |
| ComplexPairTy ComplexExprEmitter::EmitBinAdd(const BinOpInfo &Op) { |
| llvm::Value *ResR = Builder.CreateAdd(Op.LHS.first, Op.RHS.first, "add.r"); |
| llvm::Value *ResI = Builder.CreateAdd(Op.LHS.second, Op.RHS.second, "add.i"); |
| return ComplexPairTy(ResR, ResI); |
| } |
| |
| ComplexPairTy ComplexExprEmitter::EmitBinSub(const BinOpInfo &Op) { |
| llvm::Value *ResR = Builder.CreateSub(Op.LHS.first, Op.RHS.first, "sub.r"); |
| llvm::Value *ResI = Builder.CreateSub(Op.LHS.second, Op.RHS.second, "sub.i"); |
| return ComplexPairTy(ResR, ResI); |
| } |
| |
| |
| ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) { |
| llvm::Value *ResRl = Builder.CreateMul(Op.LHS.first, Op.RHS.first, "mul.rl"); |
| llvm::Value *ResRr = Builder.CreateMul(Op.LHS.second, Op.RHS.second,"mul.rr"); |
| llvm::Value *ResR = Builder.CreateSub(ResRl, ResRr, "mul.r"); |
| |
| llvm::Value *ResIl = Builder.CreateMul(Op.LHS.second, Op.RHS.first, "mul.il"); |
| llvm::Value *ResIr = Builder.CreateMul(Op.LHS.first, Op.RHS.second, "mul.ir"); |
| llvm::Value *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; |
| |
| // (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 |
| |
| llvm::Value *DSTr, *DSTi; |
| if (Tmp3->getType()->isFloatingPoint()) { |
| DSTr = Builder.CreateFDiv(Tmp3, Tmp6, "tmp"); |
| DSTi = Builder.CreateFDiv(Tmp9, Tmp6, "tmp"); |
| } else { |
| if (Op.Ty->getAsComplexType()->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) { |
| 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&)){ |
| QualType LHSTy = E->getLHS()->getType(), RHSTy = E->getRHS()->getType(); |
| |
| // Load the LHS and RHS operands. |
| LValue LHSLV = CGF.EmitLValue(E->getLHS()); |
| |
| BinOpInfo OpInfo; |
| OpInfo.Ty = E->getComputationType(); |
| |
| // We know the LHS is a complex lvalue. |
| OpInfo.LHS = EmitLoadOfComplex(LHSLV.getAddress(), false);// FIXME: Volatile. |
| OpInfo.LHS = EmitComplexToComplexCast(OpInfo.LHS, LHSTy, OpInfo.Ty); |
| |
| // It is possible for the RHS to be complex or scalar. |
| OpInfo.RHS = EmitCast(E->getRHS(), 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. |
| EmitStoreOfComplex(Result, LHSLV.getAddress(), false); // FIXME: VOLATILE |
| return Result; |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) { |
| assert(E->getLHS()->getType().getCanonicalType() == |
| E->getRHS()->getType().getCanonicalType() && "Invalid assignment"); |
| // Emit the RHS. |
| ComplexPairTy Val = Visit(E->getRHS()); |
| |
| // Compute the address to store into. |
| LValue LHS = CGF.EmitLValue(E->getLHS()); |
| |
| // Store into it. |
| // FIXME: Volatility! |
| EmitStoreOfComplex(Val, LHS.getAddress(), false); |
| return Val; |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitBinComma(const BinaryOperator *E) { |
| CGF.EmitStmt(E->getLHS()); |
| return Visit(E->getRHS()); |
| } |
| |
| ComplexPairTy ComplexExprEmitter:: |
| VisitConditionalOperator(const ConditionalOperator *E) { |
| llvm::BasicBlock *LHSBlock = llvm::BasicBlock::Create("cond.?"); |
| llvm::BasicBlock *RHSBlock = llvm::BasicBlock::Create("cond.:"); |
| llvm::BasicBlock *ContBlock = llvm::BasicBlock::Create("cond.cont"); |
| |
| llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond()); |
| Builder.CreateCondBr(Cond, 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()); |
| Builder.CreateBr(ContBlock); |
| LHSBlock = Builder.GetInsertBlock(); |
| |
| CGF.EmitBlock(RHSBlock); |
| |
| ComplexPairTy RHS = Visit(E->getRHS()); |
| Builder.CreateBr(ContBlock); |
| RHSBlock = Builder.GetInsertBlock(); |
| |
| 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) { |
| // Emit the LHS or RHS as appropriate. |
| return Visit(E->isConditionTrue(CGF.getContext()) ? E->getLHS() :E->getRHS()); |
| } |
| |
| ComplexPairTy ComplexExprEmitter::VisitInitListExpr(InitListExpr *E) { |
| if (E->getNumInits()) |
| return Visit(E->getInit(0)); |
| |
| // Empty init list intializes to null |
| QualType Ty = E->getType()->getAsComplexType()->getElementType(); |
| const llvm::Type* LTy = CGF.ConvertType(Ty); |
| llvm::Value* zeroConstant = llvm::Constant::getNullValue(LTy); |
| return ComplexPairTy(zeroConstant, zeroConstant); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // 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) { |
| assert(E && E->getType()->isAnyComplexType() && |
| "Invalid complex expression to emit"); |
| |
| return ComplexExprEmitter(*this).Visit(const_cast<Expr*>(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<Expr*>(E)); |
| Emitter.EmitStoreOfComplex(Val, 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); |
| } |