1 //===--- CGExprComplex.cpp - Emit LLVM Code for Complex Exprs -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This contains code to emit Expr nodes with complex types as LLVM code.
12 //===----------------------------------------------------------------------===//
14 #include "CodeGenFunction.h"
15 #include "CodeGenModule.h"
16 #include "clang/AST/StmtVisitor.h"
17 #include "llvm/ADT/STLExtras.h"
18 #include "llvm/IR/Constants.h"
19 #include "llvm/IR/Instructions.h"
20 #include "llvm/IR/MDBuilder.h"
21 #include "llvm/IR/Metadata.h"
23 using namespace clang;
24 using namespace CodeGen;
26 //===----------------------------------------------------------------------===//
27 // Complex Expression Emitter
28 //===----------------------------------------------------------------------===//
30 typedef CodeGenFunction::ComplexPairTy ComplexPairTy;
32 /// Return the complex type that we are meant to emit.
33 static const ComplexType *getComplexType(QualType type) {
34 type = type.getCanonicalType();
35 if (const ComplexType *comp = dyn_cast<ComplexType>(type)) {
38 return cast<ComplexType>(cast<AtomicType>(type)->getValueType());
43 class ComplexExprEmitter
44 : public StmtVisitor<ComplexExprEmitter, ComplexPairTy> {
50 ComplexExprEmitter(CodeGenFunction &cgf, bool ir=false, bool ii=false)
51 : CGF(cgf), Builder(CGF.Builder), IgnoreReal(ir), IgnoreImag(ii) {
55 //===--------------------------------------------------------------------===//
57 //===--------------------------------------------------------------------===//
59 bool TestAndClearIgnoreReal() {
64 bool TestAndClearIgnoreImag() {
70 /// EmitLoadOfLValue - Given an expression with complex type that represents a
71 /// value l-value, this method emits the address of the l-value, then loads
72 /// and returns the result.
73 ComplexPairTy EmitLoadOfLValue(const Expr *E) {
74 return EmitLoadOfLValue(CGF.EmitLValue(E), E->getExprLoc());
77 ComplexPairTy EmitLoadOfLValue(LValue LV, SourceLocation Loc);
79 /// EmitStoreOfComplex - Store the specified real/imag parts into the
80 /// specified value pointer.
81 void EmitStoreOfComplex(ComplexPairTy Val, LValue LV, bool isInit);
83 /// Emit a cast from complex value Val to DestType.
84 ComplexPairTy EmitComplexToComplexCast(ComplexPairTy Val, QualType SrcType,
85 QualType DestType, SourceLocation Loc);
86 /// Emit a cast from scalar value Val to DestType.
87 ComplexPairTy EmitScalarToComplexCast(llvm::Value *Val, QualType SrcType,
88 QualType DestType, SourceLocation Loc);
90 //===--------------------------------------------------------------------===//
92 //===--------------------------------------------------------------------===//
94 ComplexPairTy Visit(Expr *E) {
95 ApplyDebugLocation DL(CGF, E);
96 return StmtVisitor<ComplexExprEmitter, ComplexPairTy>::Visit(E);
99 ComplexPairTy VisitStmt(Stmt *S) {
100 S->dump(CGF.getContext().getSourceManager());
101 llvm_unreachable("Stmt can't have complex result type!");
103 ComplexPairTy VisitExpr(Expr *S);
104 ComplexPairTy VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr());}
105 ComplexPairTy VisitGenericSelectionExpr(GenericSelectionExpr *GE) {
106 return Visit(GE->getResultExpr());
108 ComplexPairTy VisitImaginaryLiteral(const ImaginaryLiteral *IL);
110 VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *PE) {
111 return Visit(PE->getReplacement());
113 ComplexPairTy VisitCoawaitExpr(CoawaitExpr *S) {
114 return CGF.EmitCoawaitExpr(*S).getComplexVal();
116 ComplexPairTy VisitCoyieldExpr(CoyieldExpr *S) {
117 return CGF.EmitCoyieldExpr(*S).getComplexVal();
119 ComplexPairTy VisitUnaryCoawait(const UnaryOperator *E) {
120 return Visit(E->getSubExpr());
125 ComplexPairTy VisitDeclRefExpr(DeclRefExpr *E) {
126 if (CodeGenFunction::ConstantEmission result = CGF.tryEmitAsConstant(E)) {
127 if (result.isReference())
128 return EmitLoadOfLValue(result.getReferenceLValue(CGF, E),
131 llvm::Constant *pair = result.getValue();
132 return ComplexPairTy(pair->getAggregateElement(0U),
133 pair->getAggregateElement(1U));
135 return EmitLoadOfLValue(E);
137 ComplexPairTy VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
138 return EmitLoadOfLValue(E);
140 ComplexPairTy VisitObjCMessageExpr(ObjCMessageExpr *E) {
141 return CGF.EmitObjCMessageExpr(E).getComplexVal();
143 ComplexPairTy VisitArraySubscriptExpr(Expr *E) { return EmitLoadOfLValue(E); }
144 ComplexPairTy VisitMemberExpr(const Expr *E) { return EmitLoadOfLValue(E); }
145 ComplexPairTy VisitOpaqueValueExpr(OpaqueValueExpr *E) {
147 return EmitLoadOfLValue(CGF.getOpaqueLValueMapping(E), E->getExprLoc());
148 return CGF.getOpaqueRValueMapping(E).getComplexVal();
151 ComplexPairTy VisitPseudoObjectExpr(PseudoObjectExpr *E) {
152 return CGF.EmitPseudoObjectRValue(E).getComplexVal();
155 // FIXME: CompoundLiteralExpr
157 ComplexPairTy EmitCast(CastKind CK, Expr *Op, QualType DestTy);
158 ComplexPairTy VisitImplicitCastExpr(ImplicitCastExpr *E) {
159 // Unlike for scalars, we don't have to worry about function->ptr demotion
161 return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType());
163 ComplexPairTy VisitCastExpr(CastExpr *E) {
164 if (const auto *ECE = dyn_cast<ExplicitCastExpr>(E))
165 CGF.CGM.EmitExplicitCastExprType(ECE, &CGF);
166 return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType());
168 ComplexPairTy VisitCallExpr(const CallExpr *E);
169 ComplexPairTy VisitStmtExpr(const StmtExpr *E);
172 ComplexPairTy VisitPrePostIncDec(const UnaryOperator *E,
173 bool isInc, bool isPre) {
174 LValue LV = CGF.EmitLValue(E->getSubExpr());
175 return CGF.EmitComplexPrePostIncDec(E, LV, isInc, isPre);
177 ComplexPairTy VisitUnaryPostDec(const UnaryOperator *E) {
178 return VisitPrePostIncDec(E, false, false);
180 ComplexPairTy VisitUnaryPostInc(const UnaryOperator *E) {
181 return VisitPrePostIncDec(E, true, false);
183 ComplexPairTy VisitUnaryPreDec(const UnaryOperator *E) {
184 return VisitPrePostIncDec(E, false, true);
186 ComplexPairTy VisitUnaryPreInc(const UnaryOperator *E) {
187 return VisitPrePostIncDec(E, true, true);
189 ComplexPairTy VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); }
190 ComplexPairTy VisitUnaryPlus (const UnaryOperator *E) {
191 TestAndClearIgnoreReal();
192 TestAndClearIgnoreImag();
193 return Visit(E->getSubExpr());
195 ComplexPairTy VisitUnaryMinus (const UnaryOperator *E);
196 ComplexPairTy VisitUnaryNot (const UnaryOperator *E);
197 // LNot,Real,Imag never return complex.
198 ComplexPairTy VisitUnaryExtension(const UnaryOperator *E) {
199 return Visit(E->getSubExpr());
201 ComplexPairTy VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) {
202 return Visit(DAE->getExpr());
204 ComplexPairTy VisitCXXDefaultInitExpr(CXXDefaultInitExpr *DIE) {
205 CodeGenFunction::CXXDefaultInitExprScope Scope(CGF);
206 return Visit(DIE->getExpr());
208 ComplexPairTy VisitExprWithCleanups(ExprWithCleanups *E) {
209 CGF.enterFullExpression(E);
210 CodeGenFunction::RunCleanupsScope Scope(CGF);
211 ComplexPairTy Vals = Visit(E->getSubExpr());
212 // Defend against dominance problems caused by jumps out of expression
213 // evaluation through the shared cleanup block.
214 Scope.ForceCleanup({&Vals.first, &Vals.second});
217 ComplexPairTy VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
218 assert(E->getType()->isAnyComplexType() && "Expected complex type!");
219 QualType Elem = E->getType()->castAs<ComplexType>()->getElementType();
220 llvm::Constant *Null = llvm::Constant::getNullValue(CGF.ConvertType(Elem));
221 return ComplexPairTy(Null, Null);
223 ComplexPairTy VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
224 assert(E->getType()->isAnyComplexType() && "Expected complex type!");
225 QualType Elem = E->getType()->castAs<ComplexType>()->getElementType();
226 llvm::Constant *Null =
227 llvm::Constant::getNullValue(CGF.ConvertType(Elem));
228 return ComplexPairTy(Null, Null);
234 QualType Ty; // Computation Type.
237 BinOpInfo EmitBinOps(const BinaryOperator *E);
238 LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E,
239 ComplexPairTy (ComplexExprEmitter::*Func)
242 ComplexPairTy EmitCompoundAssign(const CompoundAssignOperator *E,
243 ComplexPairTy (ComplexExprEmitter::*Func)
244 (const BinOpInfo &));
246 ComplexPairTy EmitBinAdd(const BinOpInfo &Op);
247 ComplexPairTy EmitBinSub(const BinOpInfo &Op);
248 ComplexPairTy EmitBinMul(const BinOpInfo &Op);
249 ComplexPairTy EmitBinDiv(const BinOpInfo &Op);
251 ComplexPairTy EmitComplexBinOpLibCall(StringRef LibCallName,
252 const BinOpInfo &Op);
254 ComplexPairTy VisitBinAdd(const BinaryOperator *E) {
255 return EmitBinAdd(EmitBinOps(E));
257 ComplexPairTy VisitBinSub(const BinaryOperator *E) {
258 return EmitBinSub(EmitBinOps(E));
260 ComplexPairTy VisitBinMul(const BinaryOperator *E) {
261 return EmitBinMul(EmitBinOps(E));
263 ComplexPairTy VisitBinDiv(const BinaryOperator *E) {
264 return EmitBinDiv(EmitBinOps(E));
267 // Compound assignments.
268 ComplexPairTy VisitBinAddAssign(const CompoundAssignOperator *E) {
269 return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinAdd);
271 ComplexPairTy VisitBinSubAssign(const CompoundAssignOperator *E) {
272 return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinSub);
274 ComplexPairTy VisitBinMulAssign(const CompoundAssignOperator *E) {
275 return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinMul);
277 ComplexPairTy VisitBinDivAssign(const CompoundAssignOperator *E) {
278 return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinDiv);
281 // GCC rejects rem/and/or/xor for integer complex.
282 // Logical and/or always return int, never complex.
284 // No comparisons produce a complex result.
286 LValue EmitBinAssignLValue(const BinaryOperator *E,
288 ComplexPairTy VisitBinAssign (const BinaryOperator *E);
289 ComplexPairTy VisitBinComma (const BinaryOperator *E);
293 VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO);
294 ComplexPairTy VisitChooseExpr(ChooseExpr *CE);
296 ComplexPairTy VisitInitListExpr(InitListExpr *E);
298 ComplexPairTy VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
299 return EmitLoadOfLValue(E);
302 ComplexPairTy VisitVAArgExpr(VAArgExpr *E);
304 ComplexPairTy VisitAtomicExpr(AtomicExpr *E) {
305 return CGF.EmitAtomicExpr(E).getComplexVal();
308 } // end anonymous namespace.
310 //===----------------------------------------------------------------------===//
312 //===----------------------------------------------------------------------===//
314 Address CodeGenFunction::emitAddrOfRealComponent(Address addr,
315 QualType complexType) {
316 CharUnits offset = CharUnits::Zero();
317 return Builder.CreateStructGEP(addr, 0, offset, addr.getName() + ".realp");
320 Address CodeGenFunction::emitAddrOfImagComponent(Address addr,
321 QualType complexType) {
322 QualType eltType = complexType->castAs<ComplexType>()->getElementType();
323 CharUnits offset = getContext().getTypeSizeInChars(eltType);
324 return Builder.CreateStructGEP(addr, 1, offset, addr.getName() + ".imagp");
327 /// EmitLoadOfLValue - Given an RValue reference for a complex, emit code to
328 /// load the real and imaginary pieces, returning them as Real/Imag.
329 ComplexPairTy ComplexExprEmitter::EmitLoadOfLValue(LValue lvalue,
330 SourceLocation loc) {
331 assert(lvalue.isSimple() && "non-simple complex l-value?");
332 if (lvalue.getType()->isAtomicType())
333 return CGF.EmitAtomicLoad(lvalue, loc).getComplexVal();
335 Address SrcPtr = lvalue.getAddress();
336 bool isVolatile = lvalue.isVolatileQualified();
338 llvm::Value *Real = nullptr, *Imag = nullptr;
340 if (!IgnoreReal || isVolatile) {
341 Address RealP = CGF.emitAddrOfRealComponent(SrcPtr, lvalue.getType());
342 Real = Builder.CreateLoad(RealP, isVolatile, SrcPtr.getName() + ".real");
345 if (!IgnoreImag || isVolatile) {
346 Address ImagP = CGF.emitAddrOfImagComponent(SrcPtr, lvalue.getType());
347 Imag = Builder.CreateLoad(ImagP, isVolatile, SrcPtr.getName() + ".imag");
350 return ComplexPairTy(Real, Imag);
353 /// EmitStoreOfComplex - Store the specified real/imag parts into the
354 /// specified value pointer.
355 void ComplexExprEmitter::EmitStoreOfComplex(ComplexPairTy Val, LValue lvalue,
357 if (lvalue.getType()->isAtomicType() ||
358 (!isInit && CGF.LValueIsSuitableForInlineAtomic(lvalue)))
359 return CGF.EmitAtomicStore(RValue::getComplex(Val), lvalue, isInit);
361 Address Ptr = lvalue.getAddress();
362 Address RealPtr = CGF.emitAddrOfRealComponent(Ptr, lvalue.getType());
363 Address ImagPtr = CGF.emitAddrOfImagComponent(Ptr, lvalue.getType());
365 Builder.CreateStore(Val.first, RealPtr, lvalue.isVolatileQualified());
366 Builder.CreateStore(Val.second, ImagPtr, lvalue.isVolatileQualified());
371 //===----------------------------------------------------------------------===//
373 //===----------------------------------------------------------------------===//
375 ComplexPairTy ComplexExprEmitter::VisitExpr(Expr *E) {
376 CGF.ErrorUnsupported(E, "complex expression");
378 CGF.ConvertType(getComplexType(E->getType())->getElementType());
379 llvm::Value *U = llvm::UndefValue::get(EltTy);
380 return ComplexPairTy(U, U);
383 ComplexPairTy ComplexExprEmitter::
384 VisitImaginaryLiteral(const ImaginaryLiteral *IL) {
385 llvm::Value *Imag = CGF.EmitScalarExpr(IL->getSubExpr());
386 return ComplexPairTy(llvm::Constant::getNullValue(Imag->getType()), Imag);
390 ComplexPairTy ComplexExprEmitter::VisitCallExpr(const CallExpr *E) {
391 if (E->getCallReturnType(CGF.getContext())->isReferenceType())
392 return EmitLoadOfLValue(E);
394 return CGF.EmitCallExpr(E).getComplexVal();
397 ComplexPairTy ComplexExprEmitter::VisitStmtExpr(const StmtExpr *E) {
398 CodeGenFunction::StmtExprEvaluation eval(CGF);
399 Address RetAlloca = CGF.EmitCompoundStmt(*E->getSubStmt(), true);
400 assert(RetAlloca.isValid() && "Expected complex return value");
401 return EmitLoadOfLValue(CGF.MakeAddrLValue(RetAlloca, E->getType()),
405 /// Emit a cast from complex value Val to DestType.
406 ComplexPairTy ComplexExprEmitter::EmitComplexToComplexCast(ComplexPairTy Val,
409 SourceLocation Loc) {
410 // Get the src/dest element type.
411 SrcType = SrcType->castAs<ComplexType>()->getElementType();
412 DestType = DestType->castAs<ComplexType>()->getElementType();
414 // C99 6.3.1.6: When a value of complex type is converted to another
415 // complex type, both the real and imaginary parts follow the conversion
416 // rules for the corresponding real types.
417 Val.first = CGF.EmitScalarConversion(Val.first, SrcType, DestType, Loc);
418 Val.second = CGF.EmitScalarConversion(Val.second, SrcType, DestType, Loc);
422 ComplexPairTy ComplexExprEmitter::EmitScalarToComplexCast(llvm::Value *Val,
425 SourceLocation Loc) {
426 // Convert the input element to the element type of the complex.
427 DestType = DestType->castAs<ComplexType>()->getElementType();
428 Val = CGF.EmitScalarConversion(Val, SrcType, DestType, Loc);
430 // Return (realval, 0).
431 return ComplexPairTy(Val, llvm::Constant::getNullValue(Val->getType()));
434 ComplexPairTy ComplexExprEmitter::EmitCast(CastKind CK, Expr *Op,
437 case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!");
439 // Atomic to non-atomic casts may be more than a no-op for some platforms and
441 case CK_AtomicToNonAtomic:
442 case CK_NonAtomicToAtomic:
444 case CK_LValueToRValue:
445 case CK_UserDefinedConversion:
448 case CK_LValueBitCast: {
449 LValue origLV = CGF.EmitLValue(Op);
450 Address V = origLV.getAddress();
451 V = Builder.CreateElementBitCast(V, CGF.ConvertType(DestTy));
452 return EmitLoadOfLValue(CGF.MakeAddrLValue(V, DestTy), Op->getExprLoc());
456 case CK_BaseToDerived:
457 case CK_DerivedToBase:
458 case CK_UncheckedDerivedToBase:
461 case CK_ArrayToPointerDecay:
462 case CK_FunctionToPointerDecay:
463 case CK_NullToPointer:
464 case CK_NullToMemberPointer:
465 case CK_BaseToDerivedMemberPointer:
466 case CK_DerivedToBaseMemberPointer:
467 case CK_MemberPointerToBoolean:
468 case CK_ReinterpretMemberPointer:
469 case CK_ConstructorConversion:
470 case CK_IntegralToPointer:
471 case CK_PointerToIntegral:
472 case CK_PointerToBoolean:
475 case CK_IntegralCast:
476 case CK_BooleanToSignedIntegral:
477 case CK_IntegralToBoolean:
478 case CK_IntegralToFloating:
479 case CK_FloatingToIntegral:
480 case CK_FloatingToBoolean:
481 case CK_FloatingCast:
482 case CK_CPointerToObjCPointerCast:
483 case CK_BlockPointerToObjCPointerCast:
484 case CK_AnyPointerToBlockPointerCast:
485 case CK_ObjCObjectLValueCast:
486 case CK_FloatingComplexToReal:
487 case CK_FloatingComplexToBoolean:
488 case CK_IntegralComplexToReal:
489 case CK_IntegralComplexToBoolean:
490 case CK_ARCProduceObject:
491 case CK_ARCConsumeObject:
492 case CK_ARCReclaimReturnedObject:
493 case CK_ARCExtendBlockObject:
494 case CK_CopyAndAutoreleaseBlockObject:
495 case CK_BuiltinFnToFnPtr:
496 case CK_ZeroToOCLEvent:
497 case CK_ZeroToOCLQueue:
498 case CK_AddressSpaceConversion:
499 case CK_IntToOCLSampler:
500 llvm_unreachable("invalid cast kind for complex value");
502 case CK_FloatingRealToComplex:
503 case CK_IntegralRealToComplex:
504 return EmitScalarToComplexCast(CGF.EmitScalarExpr(Op), Op->getType(),
505 DestTy, Op->getExprLoc());
507 case CK_FloatingComplexCast:
508 case CK_FloatingComplexToIntegralComplex:
509 case CK_IntegralComplexCast:
510 case CK_IntegralComplexToFloatingComplex:
511 return EmitComplexToComplexCast(Visit(Op), Op->getType(), DestTy,
515 llvm_unreachable("unknown cast resulting in complex value");
518 ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
519 TestAndClearIgnoreReal();
520 TestAndClearIgnoreImag();
521 ComplexPairTy Op = Visit(E->getSubExpr());
523 llvm::Value *ResR, *ResI;
524 if (Op.first->getType()->isFloatingPointTy()) {
525 ResR = Builder.CreateFNeg(Op.first, "neg.r");
526 ResI = Builder.CreateFNeg(Op.second, "neg.i");
528 ResR = Builder.CreateNeg(Op.first, "neg.r");
529 ResI = Builder.CreateNeg(Op.second, "neg.i");
531 return ComplexPairTy(ResR, ResI);
534 ComplexPairTy ComplexExprEmitter::VisitUnaryNot(const UnaryOperator *E) {
535 TestAndClearIgnoreReal();
536 TestAndClearIgnoreImag();
537 // ~(a+ib) = a + i*-b
538 ComplexPairTy Op = Visit(E->getSubExpr());
540 if (Op.second->getType()->isFloatingPointTy())
541 ResI = Builder.CreateFNeg(Op.second, "conj.i");
543 ResI = Builder.CreateNeg(Op.second, "conj.i");
545 return ComplexPairTy(Op.first, ResI);
548 ComplexPairTy ComplexExprEmitter::EmitBinAdd(const BinOpInfo &Op) {
549 llvm::Value *ResR, *ResI;
551 if (Op.LHS.first->getType()->isFloatingPointTy()) {
552 ResR = Builder.CreateFAdd(Op.LHS.first, Op.RHS.first, "add.r");
553 if (Op.LHS.second && Op.RHS.second)
554 ResI = Builder.CreateFAdd(Op.LHS.second, Op.RHS.second, "add.i");
556 ResI = Op.LHS.second ? Op.LHS.second : Op.RHS.second;
557 assert(ResI && "Only one operand may be real!");
559 ResR = Builder.CreateAdd(Op.LHS.first, Op.RHS.first, "add.r");
560 assert(Op.LHS.second && Op.RHS.second &&
561 "Both operands of integer complex operators must be complex!");
562 ResI = Builder.CreateAdd(Op.LHS.second, Op.RHS.second, "add.i");
564 return ComplexPairTy(ResR, ResI);
567 ComplexPairTy ComplexExprEmitter::EmitBinSub(const BinOpInfo &Op) {
568 llvm::Value *ResR, *ResI;
569 if (Op.LHS.first->getType()->isFloatingPointTy()) {
570 ResR = Builder.CreateFSub(Op.LHS.first, Op.RHS.first, "sub.r");
571 if (Op.LHS.second && Op.RHS.second)
572 ResI = Builder.CreateFSub(Op.LHS.second, Op.RHS.second, "sub.i");
574 ResI = Op.LHS.second ? Op.LHS.second
575 : Builder.CreateFNeg(Op.RHS.second, "sub.i");
576 assert(ResI && "Only one operand may be real!");
578 ResR = Builder.CreateSub(Op.LHS.first, Op.RHS.first, "sub.r");
579 assert(Op.LHS.second && Op.RHS.second &&
580 "Both operands of integer complex operators must be complex!");
581 ResI = Builder.CreateSub(Op.LHS.second, Op.RHS.second, "sub.i");
583 return ComplexPairTy(ResR, ResI);
586 /// \brief Emit a libcall for a binary operation on complex types.
587 ComplexPairTy ComplexExprEmitter::EmitComplexBinOpLibCall(StringRef LibCallName,
588 const BinOpInfo &Op) {
590 Args.add(RValue::get(Op.LHS.first),
591 Op.Ty->castAs<ComplexType>()->getElementType());
592 Args.add(RValue::get(Op.LHS.second),
593 Op.Ty->castAs<ComplexType>()->getElementType());
594 Args.add(RValue::get(Op.RHS.first),
595 Op.Ty->castAs<ComplexType>()->getElementType());
596 Args.add(RValue::get(Op.RHS.second),
597 Op.Ty->castAs<ComplexType>()->getElementType());
599 // We *must* use the full CG function call building logic here because the
600 // complex type has special ABI handling. We also should not forget about
601 // special calling convention which may be used for compiler builtins.
603 // We create a function qualified type to state that this call does not have
605 FunctionProtoType::ExtProtoInfo EPI;
606 EPI = EPI.withExceptionSpec(
607 FunctionProtoType::ExceptionSpecInfo(EST_BasicNoexcept));
608 SmallVector<QualType, 4> ArgsQTys(
609 4, Op.Ty->castAs<ComplexType>()->getElementType());
610 QualType FQTy = CGF.getContext().getFunctionType(Op.Ty, ArgsQTys, EPI);
611 const CGFunctionInfo &FuncInfo = CGF.CGM.getTypes().arrangeFreeFunctionCall(
612 Args, cast<FunctionType>(FQTy.getTypePtr()), false);
614 llvm::FunctionType *FTy = CGF.CGM.getTypes().GetFunctionType(FuncInfo);
615 llvm::Constant *Func = CGF.CGM.CreateBuiltinFunction(FTy, LibCallName);
616 CGCallee Callee = CGCallee::forDirect(Func, FQTy->getAs<FunctionProtoType>());
618 llvm::Instruction *Call;
619 RValue Res = CGF.EmitCall(FuncInfo, Callee, ReturnValueSlot(), Args, &Call);
620 cast<llvm::CallInst>(Call)->setCallingConv(CGF.CGM.getBuiltinCC());
621 return Res.getComplexVal();
624 /// \brief Lookup the libcall name for a given floating point type complex
626 static StringRef getComplexMultiplyLibCallName(llvm::Type *Ty) {
627 switch (Ty->getTypeID()) {
629 llvm_unreachable("Unsupported floating point type!");
630 case llvm::Type::HalfTyID:
632 case llvm::Type::FloatTyID:
634 case llvm::Type::DoubleTyID:
636 case llvm::Type::PPC_FP128TyID:
638 case llvm::Type::X86_FP80TyID:
640 case llvm::Type::FP128TyID:
645 // See C11 Annex G.5.1 for the semantics of multiplicative operators on complex
647 ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) {
650 llvm::MDBuilder MDHelper(CGF.getLLVMContext());
652 if (Op.LHS.first->getType()->isFloatingPointTy()) {
653 // The general formulation is:
654 // (a + ib) * (c + id) = (a * c - b * d) + i(a * d + b * c)
656 // But we can fold away components which would be zero due to a real
657 // operand according to C11 Annex G.5.1p2.
658 // FIXME: C11 also provides for imaginary types which would allow folding
659 // still more of this within the type system.
661 if (Op.LHS.second && Op.RHS.second) {
662 // If both operands are complex, emit the core math directly, and then
663 // test for NaNs. If we find NaNs in the result, we delegate to a libcall
664 // to carefully re-compute the correct infinity representation if
665 // possible. The expectation is that the presence of NaNs here is
666 // *extremely* rare, and so the cost of the libcall is almost irrelevant.
667 // This is good, because the libcall re-computes the core multiplication
668 // exactly the same as we do here and re-tests for NaNs in order to be
669 // a generic complex*complex libcall.
671 // First compute the four products.
672 Value *AC = Builder.CreateFMul(Op.LHS.first, Op.RHS.first, "mul_ac");
673 Value *BD = Builder.CreateFMul(Op.LHS.second, Op.RHS.second, "mul_bd");
674 Value *AD = Builder.CreateFMul(Op.LHS.first, Op.RHS.second, "mul_ad");
675 Value *BC = Builder.CreateFMul(Op.LHS.second, Op.RHS.first, "mul_bc");
677 // The real part is the difference of the first two, the imaginary part is
678 // the sum of the second.
679 ResR = Builder.CreateFSub(AC, BD, "mul_r");
680 ResI = Builder.CreateFAdd(AD, BC, "mul_i");
682 // Emit the test for the real part becoming NaN and create a branch to
683 // handle it. We test for NaN by comparing the number to itself.
684 Value *IsRNaN = Builder.CreateFCmpUNO(ResR, ResR, "isnan_cmp");
685 llvm::BasicBlock *ContBB = CGF.createBasicBlock("complex_mul_cont");
686 llvm::BasicBlock *INaNBB = CGF.createBasicBlock("complex_mul_imag_nan");
687 llvm::Instruction *Branch = Builder.CreateCondBr(IsRNaN, INaNBB, ContBB);
688 llvm::BasicBlock *OrigBB = Branch->getParent();
690 // Give hint that we very much don't expect to see NaNs.
691 // Value chosen to match UR_NONTAKEN_WEIGHT, see BranchProbabilityInfo.cpp
692 llvm::MDNode *BrWeight = MDHelper.createBranchWeights(1, (1U << 20) - 1);
693 Branch->setMetadata(llvm::LLVMContext::MD_prof, BrWeight);
695 // Now test the imaginary part and create its branch.
696 CGF.EmitBlock(INaNBB);
697 Value *IsINaN = Builder.CreateFCmpUNO(ResI, ResI, "isnan_cmp");
698 llvm::BasicBlock *LibCallBB = CGF.createBasicBlock("complex_mul_libcall");
699 Branch = Builder.CreateCondBr(IsINaN, LibCallBB, ContBB);
700 Branch->setMetadata(llvm::LLVMContext::MD_prof, BrWeight);
702 // Now emit the libcall on this slowest of the slow paths.
703 CGF.EmitBlock(LibCallBB);
704 Value *LibCallR, *LibCallI;
705 std::tie(LibCallR, LibCallI) = EmitComplexBinOpLibCall(
706 getComplexMultiplyLibCallName(Op.LHS.first->getType()), Op);
707 Builder.CreateBr(ContBB);
709 // Finally continue execution by phi-ing together the different
710 // computation paths.
711 CGF.EmitBlock(ContBB);
712 llvm::PHINode *RealPHI = Builder.CreatePHI(ResR->getType(), 3, "real_mul_phi");
713 RealPHI->addIncoming(ResR, OrigBB);
714 RealPHI->addIncoming(ResR, INaNBB);
715 RealPHI->addIncoming(LibCallR, LibCallBB);
716 llvm::PHINode *ImagPHI = Builder.CreatePHI(ResI->getType(), 3, "imag_mul_phi");
717 ImagPHI->addIncoming(ResI, OrigBB);
718 ImagPHI->addIncoming(ResI, INaNBB);
719 ImagPHI->addIncoming(LibCallI, LibCallBB);
720 return ComplexPairTy(RealPHI, ImagPHI);
722 assert((Op.LHS.second || Op.RHS.second) &&
723 "At least one operand must be complex!");
725 // If either of the operands is a real rather than a complex, the
726 // imaginary component is ignored when computing the real component of the
728 ResR = Builder.CreateFMul(Op.LHS.first, Op.RHS.first, "mul.rl");
731 ? Builder.CreateFMul(Op.LHS.second, Op.RHS.first, "mul.il")
732 : Builder.CreateFMul(Op.LHS.first, Op.RHS.second, "mul.ir");
734 assert(Op.LHS.second && Op.RHS.second &&
735 "Both operands of integer complex operators must be complex!");
736 Value *ResRl = Builder.CreateMul(Op.LHS.first, Op.RHS.first, "mul.rl");
737 Value *ResRr = Builder.CreateMul(Op.LHS.second, Op.RHS.second, "mul.rr");
738 ResR = Builder.CreateSub(ResRl, ResRr, "mul.r");
740 Value *ResIl = Builder.CreateMul(Op.LHS.second, Op.RHS.first, "mul.il");
741 Value *ResIr = Builder.CreateMul(Op.LHS.first, Op.RHS.second, "mul.ir");
742 ResI = Builder.CreateAdd(ResIl, ResIr, "mul.i");
744 return ComplexPairTy(ResR, ResI);
747 // See C11 Annex G.5.1 for the semantics of multiplicative operators on complex
749 ComplexPairTy ComplexExprEmitter::EmitBinDiv(const BinOpInfo &Op) {
750 llvm::Value *LHSr = Op.LHS.first, *LHSi = Op.LHS.second;
751 llvm::Value *RHSr = Op.RHS.first, *RHSi = Op.RHS.second;
754 llvm::Value *DSTr, *DSTi;
755 if (LHSr->getType()->isFloatingPointTy()) {
756 // If we have a complex operand on the RHS, we delegate to a libcall to
757 // handle all of the complexities and minimize underflow/overflow cases.
759 // FIXME: We would be able to avoid the libcall in many places if we
760 // supported imaginary types in addition to complex types.
762 BinOpInfo LibCallOp = Op;
763 // If LHS was a real, supply a null imaginary part.
765 LibCallOp.LHS.second = llvm::Constant::getNullValue(LHSr->getType());
767 StringRef LibCallName;
768 switch (LHSr->getType()->getTypeID()) {
770 llvm_unreachable("Unsupported floating point type!");
771 case llvm::Type::HalfTyID:
772 return EmitComplexBinOpLibCall("__divhc3", LibCallOp);
773 case llvm::Type::FloatTyID:
774 return EmitComplexBinOpLibCall("__divsc3", LibCallOp);
775 case llvm::Type::DoubleTyID:
776 return EmitComplexBinOpLibCall("__divdc3", LibCallOp);
777 case llvm::Type::PPC_FP128TyID:
778 return EmitComplexBinOpLibCall("__divtc3", LibCallOp);
779 case llvm::Type::X86_FP80TyID:
780 return EmitComplexBinOpLibCall("__divxc3", LibCallOp);
781 case llvm::Type::FP128TyID:
782 return EmitComplexBinOpLibCall("__divtc3", LibCallOp);
785 assert(LHSi && "Can have at most one non-complex operand!");
787 DSTr = Builder.CreateFDiv(LHSr, RHSr);
788 DSTi = Builder.CreateFDiv(LHSi, RHSr);
790 assert(Op.LHS.second && Op.RHS.second &&
791 "Both operands of integer complex operators must be complex!");
792 // (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd))
793 llvm::Value *Tmp1 = Builder.CreateMul(LHSr, RHSr); // a*c
794 llvm::Value *Tmp2 = Builder.CreateMul(LHSi, RHSi); // b*d
795 llvm::Value *Tmp3 = Builder.CreateAdd(Tmp1, Tmp2); // ac+bd
797 llvm::Value *Tmp4 = Builder.CreateMul(RHSr, RHSr); // c*c
798 llvm::Value *Tmp5 = Builder.CreateMul(RHSi, RHSi); // d*d
799 llvm::Value *Tmp6 = Builder.CreateAdd(Tmp4, Tmp5); // cc+dd
801 llvm::Value *Tmp7 = Builder.CreateMul(LHSi, RHSr); // b*c
802 llvm::Value *Tmp8 = Builder.CreateMul(LHSr, RHSi); // a*d
803 llvm::Value *Tmp9 = Builder.CreateSub(Tmp7, Tmp8); // bc-ad
805 if (Op.Ty->castAs<ComplexType>()->getElementType()->isUnsignedIntegerType()) {
806 DSTr = Builder.CreateUDiv(Tmp3, Tmp6);
807 DSTi = Builder.CreateUDiv(Tmp9, Tmp6);
809 DSTr = Builder.CreateSDiv(Tmp3, Tmp6);
810 DSTi = Builder.CreateSDiv(Tmp9, Tmp6);
814 return ComplexPairTy(DSTr, DSTi);
817 ComplexExprEmitter::BinOpInfo
818 ComplexExprEmitter::EmitBinOps(const BinaryOperator *E) {
819 TestAndClearIgnoreReal();
820 TestAndClearIgnoreImag();
822 if (E->getLHS()->getType()->isRealFloatingType())
823 Ops.LHS = ComplexPairTy(CGF.EmitScalarExpr(E->getLHS()), nullptr);
825 Ops.LHS = Visit(E->getLHS());
826 if (E->getRHS()->getType()->isRealFloatingType())
827 Ops.RHS = ComplexPairTy(CGF.EmitScalarExpr(E->getRHS()), nullptr);
829 Ops.RHS = Visit(E->getRHS());
831 Ops.Ty = E->getType();
836 LValue ComplexExprEmitter::
837 EmitCompoundAssignLValue(const CompoundAssignOperator *E,
838 ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&),
840 TestAndClearIgnoreReal();
841 TestAndClearIgnoreImag();
842 QualType LHSTy = E->getLHS()->getType();
843 if (const AtomicType *AT = LHSTy->getAs<AtomicType>())
844 LHSTy = AT->getValueType();
848 // Load the RHS and LHS operands.
849 // __block variables need to have the rhs evaluated first, plus this should
850 // improve codegen a little.
851 OpInfo.Ty = E->getComputationResultType();
852 QualType ComplexElementTy = cast<ComplexType>(OpInfo.Ty)->getElementType();
854 // The RHS should have been converted to the computation type.
855 if (E->getRHS()->getType()->isRealFloatingType()) {
858 .hasSameUnqualifiedType(ComplexElementTy, E->getRHS()->getType()));
859 OpInfo.RHS = ComplexPairTy(CGF.EmitScalarExpr(E->getRHS()), nullptr);
861 assert(CGF.getContext()
862 .hasSameUnqualifiedType(OpInfo.Ty, E->getRHS()->getType()));
863 OpInfo.RHS = Visit(E->getRHS());
866 LValue LHS = CGF.EmitLValue(E->getLHS());
868 // Load from the l-value and convert it.
869 SourceLocation Loc = E->getExprLoc();
870 if (LHSTy->isAnyComplexType()) {
871 ComplexPairTy LHSVal = EmitLoadOfLValue(LHS, Loc);
872 OpInfo.LHS = EmitComplexToComplexCast(LHSVal, LHSTy, OpInfo.Ty, Loc);
874 llvm::Value *LHSVal = CGF.EmitLoadOfScalar(LHS, Loc);
875 // For floating point real operands we can directly pass the scalar form
876 // to the binary operator emission and potentially get more efficient code.
877 if (LHSTy->isRealFloatingType()) {
878 if (!CGF.getContext().hasSameUnqualifiedType(ComplexElementTy, LHSTy))
879 LHSVal = CGF.EmitScalarConversion(LHSVal, LHSTy, ComplexElementTy, Loc);
880 OpInfo.LHS = ComplexPairTy(LHSVal, nullptr);
882 OpInfo.LHS = EmitScalarToComplexCast(LHSVal, LHSTy, OpInfo.Ty, Loc);
886 // Expand the binary operator.
887 ComplexPairTy Result = (this->*Func)(OpInfo);
889 // Truncate the result and store it into the LHS lvalue.
890 if (LHSTy->isAnyComplexType()) {
891 ComplexPairTy ResVal =
892 EmitComplexToComplexCast(Result, OpInfo.Ty, LHSTy, Loc);
893 EmitStoreOfComplex(ResVal, LHS, /*isInit*/ false);
894 Val = RValue::getComplex(ResVal);
896 llvm::Value *ResVal =
897 CGF.EmitComplexToScalarConversion(Result, OpInfo.Ty, LHSTy, Loc);
898 CGF.EmitStoreOfScalar(ResVal, LHS, /*isInit*/ false);
899 Val = RValue::get(ResVal);
905 // Compound assignments.
906 ComplexPairTy ComplexExprEmitter::
907 EmitCompoundAssign(const CompoundAssignOperator *E,
908 ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&)){
910 LValue LV = EmitCompoundAssignLValue(E, Func, Val);
912 // The result of an assignment in C is the assigned r-value.
913 if (!CGF.getLangOpts().CPlusPlus)
914 return Val.getComplexVal();
916 // If the lvalue is non-volatile, return the computed value of the assignment.
917 if (!LV.isVolatileQualified())
918 return Val.getComplexVal();
920 return EmitLoadOfLValue(LV, E->getExprLoc());
923 LValue ComplexExprEmitter::EmitBinAssignLValue(const BinaryOperator *E,
924 ComplexPairTy &Val) {
925 assert(CGF.getContext().hasSameUnqualifiedType(E->getLHS()->getType(),
926 E->getRHS()->getType()) &&
927 "Invalid assignment");
928 TestAndClearIgnoreReal();
929 TestAndClearIgnoreImag();
931 // Emit the RHS. __block variables need the RHS evaluated first.
932 Val = Visit(E->getRHS());
934 // Compute the address to store into.
935 LValue LHS = CGF.EmitLValue(E->getLHS());
937 // Store the result value into the LHS lvalue.
938 EmitStoreOfComplex(Val, LHS, /*isInit*/ false);
943 ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) {
945 LValue LV = EmitBinAssignLValue(E, Val);
947 // The result of an assignment in C is the assigned r-value.
948 if (!CGF.getLangOpts().CPlusPlus)
951 // If the lvalue is non-volatile, return the computed value of the assignment.
952 if (!LV.isVolatileQualified())
955 return EmitLoadOfLValue(LV, E->getExprLoc());
958 ComplexPairTy ComplexExprEmitter::VisitBinComma(const BinaryOperator *E) {
959 CGF.EmitIgnoredExpr(E->getLHS());
960 return Visit(E->getRHS());
963 ComplexPairTy ComplexExprEmitter::
964 VisitAbstractConditionalOperator(const AbstractConditionalOperator *E) {
965 TestAndClearIgnoreReal();
966 TestAndClearIgnoreImag();
967 llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
968 llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
969 llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");
971 // Bind the common expression if necessary.
972 CodeGenFunction::OpaqueValueMapping binding(CGF, E);
975 CodeGenFunction::ConditionalEvaluation eval(CGF);
976 CGF.EmitBranchOnBoolExpr(E->getCond(), LHSBlock, RHSBlock,
977 CGF.getProfileCount(E));
980 CGF.EmitBlock(LHSBlock);
981 CGF.incrementProfileCounter(E);
982 ComplexPairTy LHS = Visit(E->getTrueExpr());
983 LHSBlock = Builder.GetInsertBlock();
984 CGF.EmitBranch(ContBlock);
988 CGF.EmitBlock(RHSBlock);
989 ComplexPairTy RHS = Visit(E->getFalseExpr());
990 RHSBlock = Builder.GetInsertBlock();
991 CGF.EmitBlock(ContBlock);
994 // Create a PHI node for the real part.
995 llvm::PHINode *RealPN = Builder.CreatePHI(LHS.first->getType(), 2, "cond.r");
996 RealPN->addIncoming(LHS.first, LHSBlock);
997 RealPN->addIncoming(RHS.first, RHSBlock);
999 // Create a PHI node for the imaginary part.
1000 llvm::PHINode *ImagPN = Builder.CreatePHI(LHS.first->getType(), 2, "cond.i");
1001 ImagPN->addIncoming(LHS.second, LHSBlock);
1002 ImagPN->addIncoming(RHS.second, RHSBlock);
1004 return ComplexPairTy(RealPN, ImagPN);
1007 ComplexPairTy ComplexExprEmitter::VisitChooseExpr(ChooseExpr *E) {
1008 return Visit(E->getChosenSubExpr());
1011 ComplexPairTy ComplexExprEmitter::VisitInitListExpr(InitListExpr *E) {
1012 bool Ignore = TestAndClearIgnoreReal();
1014 assert (Ignore == false && "init list ignored");
1015 Ignore = TestAndClearIgnoreImag();
1017 assert (Ignore == false && "init list ignored");
1019 if (E->getNumInits() == 2) {
1020 llvm::Value *Real = CGF.EmitScalarExpr(E->getInit(0));
1021 llvm::Value *Imag = CGF.EmitScalarExpr(E->getInit(1));
1022 return ComplexPairTy(Real, Imag);
1023 } else if (E->getNumInits() == 1) {
1024 return Visit(E->getInit(0));
1027 // Empty init list intializes to null
1028 assert(E->getNumInits() == 0 && "Unexpected number of inits");
1029 QualType Ty = E->getType()->castAs<ComplexType>()->getElementType();
1030 llvm::Type* LTy = CGF.ConvertType(Ty);
1031 llvm::Value* zeroConstant = llvm::Constant::getNullValue(LTy);
1032 return ComplexPairTy(zeroConstant, zeroConstant);
1035 ComplexPairTy ComplexExprEmitter::VisitVAArgExpr(VAArgExpr *E) {
1036 Address ArgValue = Address::invalid();
1037 Address ArgPtr = CGF.EmitVAArg(E, ArgValue);
1039 if (!ArgPtr.isValid()) {
1040 CGF.ErrorUnsupported(E, "complex va_arg expression");
1042 CGF.ConvertType(E->getType()->castAs<ComplexType>()->getElementType());
1043 llvm::Value *U = llvm::UndefValue::get(EltTy);
1044 return ComplexPairTy(U, U);
1047 return EmitLoadOfLValue(CGF.MakeAddrLValue(ArgPtr, E->getType()),
1051 //===----------------------------------------------------------------------===//
1052 // Entry Point into this File
1053 //===----------------------------------------------------------------------===//
1055 /// EmitComplexExpr - Emit the computation of the specified expression of
1056 /// complex type, ignoring the result.
1057 ComplexPairTy CodeGenFunction::EmitComplexExpr(const Expr *E, bool IgnoreReal,
1059 assert(E && getComplexType(E->getType()) &&
1060 "Invalid complex expression to emit");
1062 return ComplexExprEmitter(*this, IgnoreReal, IgnoreImag)
1063 .Visit(const_cast<Expr *>(E));
1066 void CodeGenFunction::EmitComplexExprIntoLValue(const Expr *E, LValue dest,
1068 assert(E && getComplexType(E->getType()) &&
1069 "Invalid complex expression to emit");
1070 ComplexExprEmitter Emitter(*this);
1071 ComplexPairTy Val = Emitter.Visit(const_cast<Expr*>(E));
1072 Emitter.EmitStoreOfComplex(Val, dest, isInit);
1075 /// EmitStoreOfComplex - Store a complex number into the specified l-value.
1076 void CodeGenFunction::EmitStoreOfComplex(ComplexPairTy V, LValue dest,
1078 ComplexExprEmitter(*this).EmitStoreOfComplex(V, dest, isInit);
1081 /// EmitLoadOfComplex - Load a complex number from the specified address.
1082 ComplexPairTy CodeGenFunction::EmitLoadOfComplex(LValue src,
1083 SourceLocation loc) {
1084 return ComplexExprEmitter(*this).EmitLoadOfLValue(src, loc);
1087 LValue CodeGenFunction::EmitComplexAssignmentLValue(const BinaryOperator *E) {
1088 assert(E->getOpcode() == BO_Assign);
1089 ComplexPairTy Val; // ignored
1090 return ComplexExprEmitter(*this).EmitBinAssignLValue(E, Val);
1093 typedef ComplexPairTy (ComplexExprEmitter::*CompoundFunc)(
1094 const ComplexExprEmitter::BinOpInfo &);
1096 static CompoundFunc getComplexOp(BinaryOperatorKind Op) {
1098 case BO_MulAssign: return &ComplexExprEmitter::EmitBinMul;
1099 case BO_DivAssign: return &ComplexExprEmitter::EmitBinDiv;
1100 case BO_SubAssign: return &ComplexExprEmitter::EmitBinSub;
1101 case BO_AddAssign: return &ComplexExprEmitter::EmitBinAdd;
1103 llvm_unreachable("unexpected complex compound assignment");
1107 LValue CodeGenFunction::
1108 EmitComplexCompoundAssignmentLValue(const CompoundAssignOperator *E) {
1109 CompoundFunc Op = getComplexOp(E->getOpcode());
1111 return ComplexExprEmitter(*this).EmitCompoundAssignLValue(E, Op, Val);
1114 LValue CodeGenFunction::
1115 EmitScalarCompoundAssignWithComplex(const CompoundAssignOperator *E,
1116 llvm::Value *&Result) {
1117 CompoundFunc Op = getComplexOp(E->getOpcode());
1119 LValue Ret = ComplexExprEmitter(*this).EmitCompoundAssignLValue(E, Op, Val);
1120 Result = Val.getScalarVal();