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+//===--- 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<ComplexExprEmitter, ComplexPairTy> {
+ CodeGenFunction &CGF;
+ CGBuilderTy &Builder;
+ // True is we should ignore the value of a
+ bool IgnoreReal;
+ bool IgnoreImag;
+public:
+ ComplexExprEmitter(CodeGenFunction &cgf, bool ir=false, bool ii=false)
+ : CGF(cgf), Builder(CGF.Builder), IgnoreReal(ir), IgnoreImag(ii) {
+ }
+
+
+ //===--------------------------------------------------------------------===//
+ // Utilities
+ //===--------------------------------------------------------------------===//
+
+ bool TestAndClearIgnoreReal() {
+ bool I = IgnoreReal;
+ IgnoreReal = false;
+ return I;
+ }
+ bool TestAndClearIgnoreImag() {
+ bool I = IgnoreImag;
+ IgnoreImag = 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) {
+ return EmitLoadOfLValue(CGF.EmitLValue(E));
+ }
+
+ ComplexPairTy EmitLoadOfLValue(LValue LV) {
+ assert(LV.isSimple() && "complex l-value must be simple");
+ return EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified());
+ }
+
+ /// EmitLoadOfComplex - Given a pointer to a complex value, emit code to load
+ /// the real and imaginary pieces.
+ ComplexPairTy EmitLoadOfComplex(llvm::Value *SrcPtr, bool isVolatile);
+
+ /// EmitStoreThroughLValue - Given an l-value of complex type, store
+ /// a complex number into it.
+ void EmitStoreThroughLValue(ComplexPairTy Val, LValue LV) {
+ assert(LV.isSimple() && "complex l-value must be simple");
+ return EmitStoreOfComplex(Val, LV.getAddress(), LV.isVolatileQualified());
+ }
+
+ /// 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 Visit(Expr *E) {
+ return StmtVisitor<ComplexExprEmitter, ComplexPairTy>::Visit(E);
+ }
+
+ ComplexPairTy VisitStmt(Stmt *S) {
+ S->dump(CGF.getContext().getSourceManager());
+ llvm_unreachable("Stmt can't have complex result type!");
+ }
+ ComplexPairTy VisitExpr(Expr *S);
+ ComplexPairTy VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr());}
+ ComplexPairTy VisitGenericSelectionExpr(GenericSelectionExpr *GE) {
+ return Visit(GE->getResultExpr());
+ }
+ ComplexPairTy VisitImaginaryLiteral(const ImaginaryLiteral *IL);
+ ComplexPairTy
+ VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *PE) {
+ return Visit(PE->getReplacement());
+ }
+
+ // l-values.
+ ComplexPairTy VisitDeclRefExpr(DeclRefExpr *E) {
+ if (CodeGenFunction::ConstantEmission result = CGF.tryEmitAsConstant(E)) {
+ if (result.isReference())
+ return EmitLoadOfLValue(result.getReferenceLValue(CGF, E));
+
+ llvm::ConstantStruct *pair =
+ cast<llvm::ConstantStruct>(result.getValue());
+ return ComplexPairTy(pair->getOperand(0), pair->getOperand(1));
+ }
+ return EmitLoadOfLValue(E);
+ }
+ ComplexPairTy VisitObjCIvarRefExpr(ObjCIvarRefExpr *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); }
+ ComplexPairTy VisitOpaqueValueExpr(OpaqueValueExpr *E) {
+ if (E->isGLValue())
+ return EmitLoadOfLValue(CGF.getOpaqueLValueMapping(E));
+ return CGF.getOpaqueRValueMapping(E).getComplexVal();
+ }
+
+ ComplexPairTy VisitPseudoObjectExpr(PseudoObjectExpr *E) {
+ return CGF.EmitPseudoObjectRValue(E).getComplexVal();
+ }
+
+ // 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();
+ 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 VisitExprWithCleanups(ExprWithCleanups *E) {
+ CGF.enterFullExpression(E);
+ CodeGenFunction::RunCleanupsScope Scope(CGF);
+ return Visit(E->getSubExpr());
+ }
+ ComplexPairTy VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
+ assert(E->getType()->isAnyComplexType() && "Expected complex type!");
+ QualType Elem = E->getType()->getAs<ComplexType>()->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<ComplexType>()->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);
+ LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E,
+ ComplexPairTy (ComplexExprEmitter::*Func)
+ (const BinOpInfo &),
+ ComplexPairTy &Val);
+ 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 VisitBinAdd(const BinaryOperator *E) {
+ return EmitBinAdd(EmitBinOps(E));
+ }
+ ComplexPairTy VisitBinSub(const BinaryOperator *E) {
+ return EmitBinSub(EmitBinOps(E));
+ }
+ ComplexPairTy VisitBinMul(const BinaryOperator *E) {
+ return EmitBinMul(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.
+
+ LValue EmitBinAssignLValue(const BinaryOperator *E,
+ ComplexPairTy &Val);
+ ComplexPairTy VisitBinAssign (const BinaryOperator *E);
+ ComplexPairTy VisitBinComma (const BinaryOperator *E);
+
+
+ ComplexPairTy
+ VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO);
+ ComplexPairTy VisitChooseExpr(ChooseExpr *CE);
+
+ ComplexPairTy VisitInitListExpr(InitListExpr *E);
+
+ ComplexPairTy VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
+ return EmitLoadOfLValue(E);
+ }
+
+ ComplexPairTy VisitVAArgExpr(VAArgExpr *E);
+
+ ComplexPairTy VisitAtomicExpr(AtomicExpr *E) {
+ return CGF.EmitAtomicExpr(E).getComplexVal();
+ }
+};
+} // 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 || isVolatile) {
+ llvm::Value *RealP = Builder.CreateStructGEP(SrcPtr, 0,
+ SrcPtr->getName() + ".realp");
+ Real = Builder.CreateLoad(RealP, isVolatile, SrcPtr->getName() + ".real");
+ }
+
+ if (!IgnoreImag || isVolatile) {
+ 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");
+ llvm::Type *EltTy =
+ CGF.ConvertType(E->getType()->getAs<ComplexType>()->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) {
+ CodeGenFunction::StmtExprEvaluation eval(CGF);
+ 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<ComplexType>()->getElementType();
+ DestType = DestType->getAs<ComplexType>()->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) {
+ switch (CK) {
+ case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!");
+
+ // Atomic to non-atomic casts may be more than a no-op for some platforms and
+ // for some types.
+ case CK_AtomicToNonAtomic:
+ case CK_NonAtomicToAtomic:
+ case CK_NoOp:
+ case CK_LValueToRValue:
+ case CK_UserDefinedConversion:
+ return Visit(Op);
+
+ case 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());
+ }
+
+ case CK_BitCast:
+ case CK_BaseToDerived:
+ case CK_DerivedToBase:
+ case CK_UncheckedDerivedToBase:
+ case CK_Dynamic:
+ case CK_ToUnion:
+ case CK_ArrayToPointerDecay:
+ case CK_FunctionToPointerDecay:
+ case CK_NullToPointer:
+ case CK_NullToMemberPointer:
+ case CK_BaseToDerivedMemberPointer:
+ case CK_DerivedToBaseMemberPointer:
+ case CK_MemberPointerToBoolean:
+ case CK_ReinterpretMemberPointer:
+ case CK_ConstructorConversion:
+ case CK_IntegralToPointer:
+ case CK_PointerToIntegral:
+ case CK_PointerToBoolean:
+ case CK_ToVoid:
+ case CK_VectorSplat:
+ case CK_IntegralCast:
+ case CK_IntegralToBoolean:
+ case CK_IntegralToFloating:
+ case CK_FloatingToIntegral:
+ case CK_FloatingToBoolean:
+ case CK_FloatingCast:
+ case CK_CPointerToObjCPointerCast:
+ case CK_BlockPointerToObjCPointerCast:
+ case CK_AnyPointerToBlockPointerCast:
+ case CK_ObjCObjectLValueCast:
+ case CK_FloatingComplexToReal:
+ case CK_FloatingComplexToBoolean:
+ case CK_IntegralComplexToReal:
+ case CK_IntegralComplexToBoolean:
+ case CK_ARCProduceObject:
+ case CK_ARCConsumeObject:
+ case CK_ARCReclaimReturnedObject:
+ case CK_ARCExtendBlockObject:
+ case CK_CopyAndAutoreleaseBlockObject:
+ llvm_unreachable("invalid cast kind for complex value");
+
+ case CK_FloatingRealToComplex:
+ case CK_IntegralRealToComplex: {
+ llvm::Value *Elt = CGF.EmitScalarExpr(Op);
+
+ // Convert the input element to the element type of the complex.
+ DestTy = DestTy->getAs<ComplexType>()->getElementType();
+ Elt = CGF.EmitScalarConversion(Elt, Op->getType(), DestTy);
+
+ // Return (realval, 0).
+ return ComplexPairTy(Elt, llvm::Constant::getNullValue(Elt->getType()));
+ }
+
+ case CK_FloatingComplexCast:
+ case CK_FloatingComplexToIntegralComplex:
+ case CK_IntegralComplexCast:
+ case CK_IntegralComplexToFloatingComplex:
+ return EmitComplexToComplexCast(Visit(Op), Op->getType(), DestTy);
+ }
+
+ llvm_unreachable("unknown cast resulting in complex value");
+}
+
+ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
+ TestAndClearIgnoreReal();
+ TestAndClearIgnoreImag();
+ 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();
+ // ~(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); // a*c
+ llvm::Value *Tmp2 = Builder.CreateFMul(LHSi, RHSi); // b*d
+ llvm::Value *Tmp3 = Builder.CreateFAdd(Tmp1, Tmp2); // ac+bd
+
+ llvm::Value *Tmp4 = Builder.CreateFMul(RHSr, RHSr); // c*c
+ llvm::Value *Tmp5 = Builder.CreateFMul(RHSi, RHSi); // d*d
+ llvm::Value *Tmp6 = Builder.CreateFAdd(Tmp4, Tmp5); // cc+dd
+
+ llvm::Value *Tmp7 = Builder.CreateFMul(LHSi, RHSr); // b*c
+ llvm::Value *Tmp8 = Builder.CreateFMul(LHSr, RHSi); // a*d
+ llvm::Value *Tmp9 = Builder.CreateFSub(Tmp7, Tmp8); // bc-ad
+
+ DSTr = Builder.CreateFDiv(Tmp3, Tmp6);
+ DSTi = Builder.CreateFDiv(Tmp9, Tmp6);
+ } else {
+ // (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd))
+ llvm::Value *Tmp1 = Builder.CreateMul(LHSr, RHSr); // a*c
+ llvm::Value *Tmp2 = Builder.CreateMul(LHSi, RHSi); // b*d
+ llvm::Value *Tmp3 = Builder.CreateAdd(Tmp1, Tmp2); // ac+bd
+
+ llvm::Value *Tmp4 = Builder.CreateMul(RHSr, RHSr); // c*c
+ llvm::Value *Tmp5 = Builder.CreateMul(RHSi, RHSi); // d*d
+ llvm::Value *Tmp6 = Builder.CreateAdd(Tmp4, Tmp5); // cc+dd
+
+ llvm::Value *Tmp7 = Builder.CreateMul(LHSi, RHSr); // b*c
+ llvm::Value *Tmp8 = Builder.CreateMul(LHSr, RHSi); // a*d
+ llvm::Value *Tmp9 = Builder.CreateSub(Tmp7, Tmp8); // bc-ad
+
+ if (Op.Ty->getAs<ComplexType>()->getElementType()->isUnsignedIntegerType()) {
+ DSTr = Builder.CreateUDiv(Tmp3, Tmp6);
+ DSTi = Builder.CreateUDiv(Tmp9, Tmp6);
+ } else {
+ DSTr = Builder.CreateSDiv(Tmp3, Tmp6);
+ DSTi = Builder.CreateSDiv(Tmp9, Tmp6);
+ }
+ }
+
+ return ComplexPairTy(DSTr, DSTi);
+}
+
+ComplexExprEmitter::BinOpInfo
+ComplexExprEmitter::EmitBinOps(const BinaryOperator *E) {
+ TestAndClearIgnoreReal();
+ TestAndClearIgnoreImag();
+ BinOpInfo Ops;
+ Ops.LHS = Visit(E->getLHS());
+ Ops.RHS = Visit(E->getRHS());
+ Ops.Ty = E->getType();
+ return Ops;
+}
+
+
+LValue ComplexExprEmitter::
+EmitCompoundAssignLValue(const CompoundAssignOperator *E,
+ ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&),
+ ComplexPairTy &Val) {
+ TestAndClearIgnoreReal();
+ TestAndClearIgnoreImag();
+ QualType LHSTy = E->getLHS()->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.
+ OpInfo.Ty = E->getComputationResultType();
+
+ // The RHS should have been converted to the computation type.
+ assert(OpInfo.Ty->isAnyComplexType());
+ assert(CGF.getContext().hasSameUnqualifiedType(OpInfo.Ty,
+ E->getRHS()->getType()));
+ OpInfo.RHS = Visit(E->getRHS());
+
+ LValue LHS = CGF.EmitLValue(E->getLHS());
+
+ // Load from the l-value.
+ ComplexPairTy LHSComplexPair = EmitLoadOfLValue(LHS);
+
+ 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);
+ Val = Result;
+
+ // Store the result value into the LHS lvalue.
+ EmitStoreThroughLValue(Result, LHS);
+
+ return LHS;
+}
+
+// Compound assignments.
+ComplexPairTy ComplexExprEmitter::
+EmitCompoundAssign(const CompoundAssignOperator *E,
+ ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&)){
+ ComplexPairTy Val;
+ LValue LV = EmitCompoundAssignLValue(E, Func, Val);
+
+ // The result of an assignment in C is the assigned r-value.
+ if (!CGF.getContext().getLangOpts().CPlusPlus)
+ return Val;
+
+ // If the lvalue is non-volatile, return the computed value of the assignment.
+ if (!LV.isVolatileQualified())
+ return Val;
+
+ return EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified());
+}
+
+LValue ComplexExprEmitter::EmitBinAssignLValue(const BinaryOperator *E,
+ ComplexPairTy &Val) {
+ assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(),
+ E->getRHS()->getType()) &&
+ "Invalid assignment");
+ TestAndClearIgnoreReal();
+ TestAndClearIgnoreImag();
+
+ // Emit the RHS. __block variables need the RHS evaluated first.
+ Val = Visit(E->getRHS());
+
+ // Compute the address to store into.
+ LValue LHS = CGF.EmitLValue(E->getLHS());
+
+ // Store the result value into the LHS lvalue.
+ EmitStoreThroughLValue(Val, LHS);
+
+ return LHS;
+}
+
+ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) {
+ ComplexPairTy Val;
+ LValue LV = EmitBinAssignLValue(E, Val);
+
+ // The result of an assignment in C is the assigned r-value.
+ if (!CGF.getContext().getLangOpts().CPlusPlus)
+ return Val;
+
+ // If the lvalue is non-volatile, return the computed value of the assignment.
+ if (!LV.isVolatileQualified())
+ return Val;
+
+ return EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified());
+}
+
+ComplexPairTy ComplexExprEmitter::VisitBinComma(const BinaryOperator *E) {
+ CGF.EmitIgnoredExpr(E->getLHS());
+ return Visit(E->getRHS());
+}
+
+ComplexPairTy ComplexExprEmitter::
+VisitAbstractConditionalOperator(const AbstractConditionalOperator *E) {
+ TestAndClearIgnoreReal();
+ TestAndClearIgnoreImag();
+ llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
+ llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
+ llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");
+
+ // Bind the common expression if necessary.
+ CodeGenFunction::OpaqueValueMapping binding(CGF, E);
+
+ CodeGenFunction::ConditionalEvaluation eval(CGF);
+ CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock);
+
+ eval.begin(CGF);
+ CGF.EmitBlock(LHSBlock);
+ ComplexPairTy LHS = Visit(E->getTrueExpr());
+ LHSBlock = Builder.GetInsertBlock();
+ CGF.EmitBranch(ContBlock);
+ eval.end(CGF);
+
+ eval.begin(CGF);
+ CGF.EmitBlock(RHSBlock);
+ ComplexPairTy RHS = Visit(E->getFalseExpr());
+ RHSBlock = Builder.GetInsertBlock();
+ CGF.EmitBlock(ContBlock);
+ eval.end(CGF);
+
+ // Create a PHI node for the real part.
+ llvm::PHINode *RealPN = Builder.CreatePHI(LHS.first->getType(), 2, "cond.r");
+ 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(), 2, "cond.i");
+ 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() == 2) {
+ llvm::Value *Real = CGF.EmitScalarExpr(E->getInit(0));
+ llvm::Value *Imag = CGF.EmitScalarExpr(E->getInit(1));
+ return ComplexPairTy(Real, Imag);
+ } else if (E->getNumInits() == 1) {
+ return Visit(E->getInit(0));
+ }
+
+ // Empty init list intializes to null
+ assert(E->getNumInits() == 0 && "Unexpected number of inits");
+ QualType Ty = E->getType()->getAs<ComplexType>()->getElementType();
+ 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");
+ llvm::Type *EltTy =
+ CGF.ConvertType(E->getType()->getAs<ComplexType>()->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) {
+ assert(E && E->getType()->isAnyComplexType() &&
+ "Invalid complex expression to emit");
+
+ return ComplexExprEmitter(*this, IgnoreReal, IgnoreImag)
+ .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);
+}
+
+/// 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);
+}
+
+LValue CodeGenFunction::EmitComplexAssignmentLValue(const BinaryOperator *E) {
+ assert(E->getOpcode() == BO_Assign);
+ ComplexPairTy Val; // ignored
+ return ComplexExprEmitter(*this).EmitBinAssignLValue(E, Val);
+}
+
+LValue CodeGenFunction::
+EmitComplexCompoundAssignmentLValue(const CompoundAssignOperator *E) {
+ ComplexPairTy(ComplexExprEmitter::*Op)(const ComplexExprEmitter::BinOpInfo &);
+ switch (E->getOpcode()) {
+ case BO_MulAssign: Op = &ComplexExprEmitter::EmitBinMul; break;
+ case BO_DivAssign: Op = &ComplexExprEmitter::EmitBinDiv; break;
+ case BO_SubAssign: Op = &ComplexExprEmitter::EmitBinSub; break;
+ case BO_AddAssign: Op = &ComplexExprEmitter::EmitBinAdd; break;
+
+ default:
+ llvm_unreachable("unexpected complex compound assignment");
+ }
+
+ ComplexPairTy Val; // ignored
+ return ComplexExprEmitter(*this).EmitCompoundAssignLValue(E, Op, Val);
+}