899 lines
33 KiB
C++
899 lines
33 KiB
C++
//===--- CGExprComplex.cpp - Emit LLVM Code for Complex Exprs -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This contains code to emit Expr nodes with complex types as LLVM code.
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//
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//===----------------------------------------------------------------------===//
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#include "CodeGenFunction.h"
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#include "CodeGenModule.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/StmtVisitor.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/Function.h"
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#include <algorithm>
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using namespace clang;
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using namespace CodeGen;
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//===----------------------------------------------------------------------===//
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// Complex Expression Emitter
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//===----------------------------------------------------------------------===//
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typedef CodeGenFunction::ComplexPairTy ComplexPairTy;
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/// Return the complex type that we are meant to emit.
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static const ComplexType *getComplexType(QualType type) {
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type = type.getCanonicalType();
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if (const ComplexType *comp = dyn_cast<ComplexType>(type)) {
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return comp;
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} else {
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return cast<ComplexType>(cast<AtomicType>(type)->getValueType());
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}
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}
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namespace {
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class ComplexExprEmitter
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: public StmtVisitor<ComplexExprEmitter, ComplexPairTy> {
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CodeGenFunction &CGF;
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CGBuilderTy &Builder;
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bool IgnoreReal;
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bool IgnoreImag;
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public:
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ComplexExprEmitter(CodeGenFunction &cgf, bool ir=false, bool ii=false)
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: CGF(cgf), Builder(CGF.Builder), IgnoreReal(ir), IgnoreImag(ii) {
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}
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//===--------------------------------------------------------------------===//
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// Utilities
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//===--------------------------------------------------------------------===//
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bool TestAndClearIgnoreReal() {
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bool I = IgnoreReal;
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IgnoreReal = false;
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return I;
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}
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bool TestAndClearIgnoreImag() {
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bool I = IgnoreImag;
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IgnoreImag = false;
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return I;
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}
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/// EmitLoadOfLValue - Given an expression with complex type that represents a
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/// value l-value, this method emits the address of the l-value, then loads
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/// and returns the result.
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ComplexPairTy EmitLoadOfLValue(const Expr *E) {
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return EmitLoadOfLValue(CGF.EmitLValue(E), E->getExprLoc());
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}
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ComplexPairTy EmitLoadOfLValue(LValue LV, SourceLocation Loc);
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/// EmitStoreOfComplex - Store the specified real/imag parts into the
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/// specified value pointer.
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void EmitStoreOfComplex(ComplexPairTy Val, LValue LV, bool isInit);
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/// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType.
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ComplexPairTy EmitComplexToComplexCast(ComplexPairTy Val, QualType SrcType,
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QualType DestType);
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/// EmitComplexToComplexCast - Emit a cast from scalar value Val to DestType.
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ComplexPairTy EmitScalarToComplexCast(llvm::Value *Val, QualType SrcType,
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QualType DestType);
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//===--------------------------------------------------------------------===//
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// Visitor Methods
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//===--------------------------------------------------------------------===//
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ComplexPairTy Visit(Expr *E) {
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return StmtVisitor<ComplexExprEmitter, ComplexPairTy>::Visit(E);
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}
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ComplexPairTy VisitStmt(Stmt *S) {
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S->dump(CGF.getContext().getSourceManager());
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llvm_unreachable("Stmt can't have complex result type!");
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}
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ComplexPairTy VisitExpr(Expr *S);
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ComplexPairTy VisitParenExpr(ParenExpr *PE) { return Visit(PE->getSubExpr());}
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ComplexPairTy VisitGenericSelectionExpr(GenericSelectionExpr *GE) {
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return Visit(GE->getResultExpr());
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}
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ComplexPairTy VisitImaginaryLiteral(const ImaginaryLiteral *IL);
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ComplexPairTy
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VisitSubstNonTypeTemplateParmExpr(SubstNonTypeTemplateParmExpr *PE) {
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return Visit(PE->getReplacement());
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}
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// l-values.
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ComplexPairTy VisitDeclRefExpr(DeclRefExpr *E) {
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if (CodeGenFunction::ConstantEmission result = CGF.tryEmitAsConstant(E)) {
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if (result.isReference())
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return EmitLoadOfLValue(result.getReferenceLValue(CGF, E),
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E->getExprLoc());
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llvm::Constant *pair = result.getValue();
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return ComplexPairTy(pair->getAggregateElement(0U),
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pair->getAggregateElement(1U));
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}
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return EmitLoadOfLValue(E);
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}
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ComplexPairTy VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
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return EmitLoadOfLValue(E);
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}
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ComplexPairTy VisitObjCMessageExpr(ObjCMessageExpr *E) {
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return CGF.EmitObjCMessageExpr(E).getComplexVal();
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}
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ComplexPairTy VisitArraySubscriptExpr(Expr *E) { return EmitLoadOfLValue(E); }
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ComplexPairTy VisitMemberExpr(const Expr *E) { return EmitLoadOfLValue(E); }
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ComplexPairTy VisitOpaqueValueExpr(OpaqueValueExpr *E) {
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if (E->isGLValue())
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return EmitLoadOfLValue(CGF.getOpaqueLValueMapping(E), E->getExprLoc());
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return CGF.getOpaqueRValueMapping(E).getComplexVal();
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}
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ComplexPairTy VisitPseudoObjectExpr(PseudoObjectExpr *E) {
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return CGF.EmitPseudoObjectRValue(E).getComplexVal();
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}
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// FIXME: CompoundLiteralExpr
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ComplexPairTy EmitCast(CastExpr::CastKind CK, Expr *Op, QualType DestTy);
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ComplexPairTy VisitImplicitCastExpr(ImplicitCastExpr *E) {
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// Unlike for scalars, we don't have to worry about function->ptr demotion
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// here.
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return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType());
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}
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ComplexPairTy VisitCastExpr(CastExpr *E) {
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return EmitCast(E->getCastKind(), E->getSubExpr(), E->getType());
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}
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ComplexPairTy VisitCallExpr(const CallExpr *E);
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ComplexPairTy VisitStmtExpr(const StmtExpr *E);
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// Operators.
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ComplexPairTy VisitPrePostIncDec(const UnaryOperator *E,
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bool isInc, bool isPre) {
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LValue LV = CGF.EmitLValue(E->getSubExpr());
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return CGF.EmitComplexPrePostIncDec(E, LV, isInc, isPre);
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}
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ComplexPairTy VisitUnaryPostDec(const UnaryOperator *E) {
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return VisitPrePostIncDec(E, false, false);
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}
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ComplexPairTy VisitUnaryPostInc(const UnaryOperator *E) {
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return VisitPrePostIncDec(E, true, false);
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}
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ComplexPairTy VisitUnaryPreDec(const UnaryOperator *E) {
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return VisitPrePostIncDec(E, false, true);
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}
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ComplexPairTy VisitUnaryPreInc(const UnaryOperator *E) {
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return VisitPrePostIncDec(E, true, true);
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}
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ComplexPairTy VisitUnaryDeref(const Expr *E) { return EmitLoadOfLValue(E); }
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ComplexPairTy VisitUnaryPlus (const UnaryOperator *E) {
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TestAndClearIgnoreReal();
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TestAndClearIgnoreImag();
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return Visit(E->getSubExpr());
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}
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ComplexPairTy VisitUnaryMinus (const UnaryOperator *E);
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ComplexPairTy VisitUnaryNot (const UnaryOperator *E);
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// LNot,Real,Imag never return complex.
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ComplexPairTy VisitUnaryExtension(const UnaryOperator *E) {
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return Visit(E->getSubExpr());
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}
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ComplexPairTy VisitCXXDefaultArgExpr(CXXDefaultArgExpr *DAE) {
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return Visit(DAE->getExpr());
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}
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ComplexPairTy VisitCXXDefaultInitExpr(CXXDefaultInitExpr *DIE) {
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CodeGenFunction::CXXDefaultInitExprScope Scope(CGF);
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return Visit(DIE->getExpr());
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}
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ComplexPairTy VisitExprWithCleanups(ExprWithCleanups *E) {
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CGF.enterFullExpression(E);
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CodeGenFunction::RunCleanupsScope Scope(CGF);
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return Visit(E->getSubExpr());
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}
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ComplexPairTy VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) {
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assert(E->getType()->isAnyComplexType() && "Expected complex type!");
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QualType Elem = E->getType()->castAs<ComplexType>()->getElementType();
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llvm::Constant *Null = llvm::Constant::getNullValue(CGF.ConvertType(Elem));
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return ComplexPairTy(Null, Null);
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}
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ComplexPairTy VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
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assert(E->getType()->isAnyComplexType() && "Expected complex type!");
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QualType Elem = E->getType()->castAs<ComplexType>()->getElementType();
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llvm::Constant *Null =
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llvm::Constant::getNullValue(CGF.ConvertType(Elem));
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return ComplexPairTy(Null, Null);
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}
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struct BinOpInfo {
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ComplexPairTy LHS;
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ComplexPairTy RHS;
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QualType Ty; // Computation Type.
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};
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BinOpInfo EmitBinOps(const BinaryOperator *E);
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LValue EmitCompoundAssignLValue(const CompoundAssignOperator *E,
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ComplexPairTy (ComplexExprEmitter::*Func)
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(const BinOpInfo &),
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RValue &Val);
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ComplexPairTy EmitCompoundAssign(const CompoundAssignOperator *E,
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ComplexPairTy (ComplexExprEmitter::*Func)
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(const BinOpInfo &));
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ComplexPairTy EmitBinAdd(const BinOpInfo &Op);
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ComplexPairTy EmitBinSub(const BinOpInfo &Op);
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ComplexPairTy EmitBinMul(const BinOpInfo &Op);
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ComplexPairTy EmitBinDiv(const BinOpInfo &Op);
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ComplexPairTy VisitBinAdd(const BinaryOperator *E) {
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return EmitBinAdd(EmitBinOps(E));
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}
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ComplexPairTy VisitBinSub(const BinaryOperator *E) {
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return EmitBinSub(EmitBinOps(E));
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}
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ComplexPairTy VisitBinMul(const BinaryOperator *E) {
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return EmitBinMul(EmitBinOps(E));
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}
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ComplexPairTy VisitBinDiv(const BinaryOperator *E) {
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return EmitBinDiv(EmitBinOps(E));
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}
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// Compound assignments.
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ComplexPairTy VisitBinAddAssign(const CompoundAssignOperator *E) {
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return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinAdd);
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}
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ComplexPairTy VisitBinSubAssign(const CompoundAssignOperator *E) {
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return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinSub);
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}
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ComplexPairTy VisitBinMulAssign(const CompoundAssignOperator *E) {
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return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinMul);
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}
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ComplexPairTy VisitBinDivAssign(const CompoundAssignOperator *E) {
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return EmitCompoundAssign(E, &ComplexExprEmitter::EmitBinDiv);
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}
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// GCC rejects rem/and/or/xor for integer complex.
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// Logical and/or always return int, never complex.
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// No comparisons produce a complex result.
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LValue EmitBinAssignLValue(const BinaryOperator *E,
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ComplexPairTy &Val);
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ComplexPairTy VisitBinAssign (const BinaryOperator *E);
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ComplexPairTy VisitBinComma (const BinaryOperator *E);
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ComplexPairTy
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VisitAbstractConditionalOperator(const AbstractConditionalOperator *CO);
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ComplexPairTy VisitChooseExpr(ChooseExpr *CE);
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ComplexPairTy VisitInitListExpr(InitListExpr *E);
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ComplexPairTy VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
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return EmitLoadOfLValue(E);
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}
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ComplexPairTy VisitVAArgExpr(VAArgExpr *E);
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ComplexPairTy VisitAtomicExpr(AtomicExpr *E) {
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return CGF.EmitAtomicExpr(E).getComplexVal();
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}
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};
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} // end anonymous namespace.
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//===----------------------------------------------------------------------===//
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// Utilities
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//===----------------------------------------------------------------------===//
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/// EmitLoadOfLValue - Given an RValue reference for a complex, emit code to
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/// load the real and imaginary pieces, returning them as Real/Imag.
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ComplexPairTy ComplexExprEmitter::EmitLoadOfLValue(LValue lvalue,
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SourceLocation loc) {
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assert(lvalue.isSimple() && "non-simple complex l-value?");
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if (lvalue.getType()->isAtomicType())
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return CGF.EmitAtomicLoad(lvalue, loc).getComplexVal();
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llvm::Value *SrcPtr = lvalue.getAddress();
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bool isVolatile = lvalue.isVolatileQualified();
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unsigned AlignR = lvalue.getAlignment().getQuantity();
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ASTContext &C = CGF.getContext();
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QualType ComplexTy = lvalue.getType();
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unsigned ComplexAlign = C.getTypeAlignInChars(ComplexTy).getQuantity();
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unsigned AlignI = std::min(AlignR, ComplexAlign);
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llvm::Value *Real=0, *Imag=0;
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if (!IgnoreReal || isVolatile) {
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llvm::Value *RealP = Builder.CreateStructGEP(SrcPtr, 0,
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SrcPtr->getName() + ".realp");
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Real = Builder.CreateAlignedLoad(RealP, AlignR, isVolatile,
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SrcPtr->getName() + ".real");
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}
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if (!IgnoreImag || isVolatile) {
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llvm::Value *ImagP = Builder.CreateStructGEP(SrcPtr, 1,
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SrcPtr->getName() + ".imagp");
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Imag = Builder.CreateAlignedLoad(ImagP, AlignI, isVolatile,
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SrcPtr->getName() + ".imag");
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}
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return ComplexPairTy(Real, Imag);
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}
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/// EmitStoreOfComplex - Store the specified real/imag parts into the
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/// specified value pointer.
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void ComplexExprEmitter::EmitStoreOfComplex(ComplexPairTy Val,
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LValue lvalue,
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bool isInit) {
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if (lvalue.getType()->isAtomicType())
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return CGF.EmitAtomicStore(RValue::getComplex(Val), lvalue, isInit);
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llvm::Value *Ptr = lvalue.getAddress();
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llvm::Value *RealPtr = Builder.CreateStructGEP(Ptr, 0, "real");
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llvm::Value *ImagPtr = Builder.CreateStructGEP(Ptr, 1, "imag");
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unsigned AlignR = lvalue.getAlignment().getQuantity();
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ASTContext &C = CGF.getContext();
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QualType ComplexTy = lvalue.getType();
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unsigned ComplexAlign = C.getTypeAlignInChars(ComplexTy).getQuantity();
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unsigned AlignI = std::min(AlignR, ComplexAlign);
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Builder.CreateAlignedStore(Val.first, RealPtr, AlignR,
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lvalue.isVolatileQualified());
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Builder.CreateAlignedStore(Val.second, ImagPtr, AlignI,
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lvalue.isVolatileQualified());
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}
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//===----------------------------------------------------------------------===//
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// Visitor Methods
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//===----------------------------------------------------------------------===//
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ComplexPairTy ComplexExprEmitter::VisitExpr(Expr *E) {
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CGF.ErrorUnsupported(E, "complex expression");
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llvm::Type *EltTy =
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CGF.ConvertType(getComplexType(E->getType())->getElementType());
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llvm::Value *U = llvm::UndefValue::get(EltTy);
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return ComplexPairTy(U, U);
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}
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ComplexPairTy ComplexExprEmitter::
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VisitImaginaryLiteral(const ImaginaryLiteral *IL) {
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llvm::Value *Imag = CGF.EmitScalarExpr(IL->getSubExpr());
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return ComplexPairTy(llvm::Constant::getNullValue(Imag->getType()), Imag);
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}
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ComplexPairTy ComplexExprEmitter::VisitCallExpr(const CallExpr *E) {
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if (E->getCallReturnType()->isReferenceType())
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return EmitLoadOfLValue(E);
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return CGF.EmitCallExpr(E).getComplexVal();
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}
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ComplexPairTy ComplexExprEmitter::VisitStmtExpr(const StmtExpr *E) {
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CodeGenFunction::StmtExprEvaluation eval(CGF);
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llvm::Value *RetAlloca = CGF.EmitCompoundStmt(*E->getSubStmt(), true);
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assert(RetAlloca && "Expected complex return value");
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return EmitLoadOfLValue(CGF.MakeAddrLValue(RetAlloca, E->getType()),
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E->getExprLoc());
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}
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/// EmitComplexToComplexCast - Emit a cast from complex value Val to DestType.
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ComplexPairTy ComplexExprEmitter::EmitComplexToComplexCast(ComplexPairTy Val,
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QualType SrcType,
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QualType DestType) {
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// Get the src/dest element type.
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SrcType = SrcType->castAs<ComplexType>()->getElementType();
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DestType = DestType->castAs<ComplexType>()->getElementType();
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// C99 6.3.1.6: When a value of complex type is converted to another
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// complex type, both the real and imaginary parts follow the conversion
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// rules for the corresponding real types.
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Val.first = CGF.EmitScalarConversion(Val.first, SrcType, DestType);
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Val.second = CGF.EmitScalarConversion(Val.second, SrcType, DestType);
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return Val;
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}
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ComplexPairTy ComplexExprEmitter::EmitScalarToComplexCast(llvm::Value *Val,
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QualType SrcType,
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QualType DestType) {
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// Convert the input element to the element type of the complex.
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DestType = DestType->castAs<ComplexType>()->getElementType();
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Val = CGF.EmitScalarConversion(Val, SrcType, DestType);
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// Return (realval, 0).
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return ComplexPairTy(Val, llvm::Constant::getNullValue(Val->getType()));
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}
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ComplexPairTy ComplexExprEmitter::EmitCast(CastExpr::CastKind CK, Expr *Op,
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QualType DestTy) {
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switch (CK) {
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case CK_Dependent: llvm_unreachable("dependent cast kind in IR gen!");
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// Atomic to non-atomic casts may be more than a no-op for some platforms and
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// for some types.
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case CK_AtomicToNonAtomic:
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case CK_NonAtomicToAtomic:
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case CK_NoOp:
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case CK_LValueToRValue:
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case CK_UserDefinedConversion:
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return Visit(Op);
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case CK_LValueBitCast: {
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LValue origLV = CGF.EmitLValue(Op);
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llvm::Value *V = origLV.getAddress();
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V = Builder.CreateBitCast(V,
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CGF.ConvertType(CGF.getContext().getPointerType(DestTy)));
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return EmitLoadOfLValue(CGF.MakeAddrLValue(V, DestTy,
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origLV.getAlignment()),
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Op->getExprLoc());
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}
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case CK_BitCast:
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case CK_BaseToDerived:
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case CK_DerivedToBase:
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case CK_UncheckedDerivedToBase:
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case CK_Dynamic:
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case CK_ToUnion:
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case CK_ArrayToPointerDecay:
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case CK_FunctionToPointerDecay:
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case CK_NullToPointer:
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case CK_NullToMemberPointer:
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case CK_BaseToDerivedMemberPointer:
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case CK_DerivedToBaseMemberPointer:
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case CK_MemberPointerToBoolean:
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case CK_ReinterpretMemberPointer:
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case CK_ConstructorConversion:
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case CK_IntegralToPointer:
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case CK_PointerToIntegral:
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case CK_PointerToBoolean:
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case CK_ToVoid:
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case CK_VectorSplat:
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case CK_IntegralCast:
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case CK_IntegralToBoolean:
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case CK_IntegralToFloating:
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case CK_FloatingToIntegral:
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case CK_FloatingToBoolean:
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case CK_FloatingCast:
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case CK_CPointerToObjCPointerCast:
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case CK_BlockPointerToObjCPointerCast:
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case CK_AnyPointerToBlockPointerCast:
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case CK_ObjCObjectLValueCast:
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case CK_FloatingComplexToReal:
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case CK_FloatingComplexToBoolean:
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case CK_IntegralComplexToReal:
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case CK_IntegralComplexToBoolean:
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case CK_ARCProduceObject:
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case CK_ARCConsumeObject:
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case CK_ARCReclaimReturnedObject:
|
|
case CK_ARCExtendBlockObject:
|
|
case CK_CopyAndAutoreleaseBlockObject:
|
|
case CK_BuiltinFnToFnPtr:
|
|
case CK_ZeroToOCLEvent:
|
|
llvm_unreachable("invalid cast kind for complex value");
|
|
|
|
case CK_FloatingRealToComplex:
|
|
case CK_IntegralRealToComplex:
|
|
return EmitScalarToComplexCast(CGF.EmitScalarExpr(Op),
|
|
Op->getType(), DestTy);
|
|
|
|
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->castAs<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&),
|
|
RValue &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 and convert it.
|
|
if (LHSTy->isAnyComplexType()) {
|
|
ComplexPairTy LHSVal = EmitLoadOfLValue(LHS, E->getExprLoc());
|
|
OpInfo.LHS = EmitComplexToComplexCast(LHSVal, LHSTy, OpInfo.Ty);
|
|
} else {
|
|
llvm::Value *LHSVal = CGF.EmitLoadOfScalar(LHS, E->getExprLoc());
|
|
OpInfo.LHS = EmitScalarToComplexCast(LHSVal, LHSTy, OpInfo.Ty);
|
|
}
|
|
|
|
// Expand the binary operator.
|
|
ComplexPairTy Result = (this->*Func)(OpInfo);
|
|
|
|
// Truncate the result and store it into the LHS lvalue.
|
|
if (LHSTy->isAnyComplexType()) {
|
|
ComplexPairTy ResVal = EmitComplexToComplexCast(Result, OpInfo.Ty, LHSTy);
|
|
EmitStoreOfComplex(ResVal, LHS, /*isInit*/ false);
|
|
Val = RValue::getComplex(ResVal);
|
|
} else {
|
|
llvm::Value *ResVal =
|
|
CGF.EmitComplexToScalarConversion(Result, OpInfo.Ty, LHSTy);
|
|
CGF.EmitStoreOfScalar(ResVal, LHS, /*isInit*/ false);
|
|
Val = RValue::get(ResVal);
|
|
}
|
|
|
|
return LHS;
|
|
}
|
|
|
|
// Compound assignments.
|
|
ComplexPairTy ComplexExprEmitter::
|
|
EmitCompoundAssign(const CompoundAssignOperator *E,
|
|
ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&)){
|
|
RValue Val;
|
|
LValue LV = EmitCompoundAssignLValue(E, Func, Val);
|
|
|
|
// The result of an assignment in C is the assigned r-value.
|
|
if (!CGF.getLangOpts().CPlusPlus)
|
|
return Val.getComplexVal();
|
|
|
|
// If the lvalue is non-volatile, return the computed value of the assignment.
|
|
if (!LV.isVolatileQualified())
|
|
return Val.getComplexVal();
|
|
|
|
return EmitLoadOfLValue(LV, E->getExprLoc());
|
|
}
|
|
|
|
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.
|
|
EmitStoreOfComplex(Val, LHS, /*isInit*/ false);
|
|
|
|
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.getLangOpts().CPlusPlus)
|
|
return Val;
|
|
|
|
// If the lvalue is non-volatile, return the computed value of the assignment.
|
|
if (!LV.isVolatileQualified())
|
|
return Val;
|
|
|
|
return EmitLoadOfLValue(LV, E->getExprLoc());
|
|
}
|
|
|
|
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());
|
|
}
|
|
|
|
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()->castAs<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()->castAs<ComplexType>()->getElementType());
|
|
llvm::Value *U = llvm::UndefValue::get(EltTy);
|
|
return ComplexPairTy(U, U);
|
|
}
|
|
|
|
return EmitLoadOfLValue(CGF.MakeNaturalAlignAddrLValue(ArgPtr, E->getType()),
|
|
E->getExprLoc());
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// 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 && getComplexType(E->getType()) &&
|
|
"Invalid complex expression to emit");
|
|
|
|
return ComplexExprEmitter(*this, IgnoreReal, IgnoreImag)
|
|
.Visit(const_cast<Expr*>(E));
|
|
}
|
|
|
|
void CodeGenFunction::EmitComplexExprIntoLValue(const Expr *E, LValue dest,
|
|
bool isInit) {
|
|
assert(E && getComplexType(E->getType()) &&
|
|
"Invalid complex expression to emit");
|
|
ComplexExprEmitter Emitter(*this);
|
|
ComplexPairTy Val = Emitter.Visit(const_cast<Expr*>(E));
|
|
Emitter.EmitStoreOfComplex(Val, dest, isInit);
|
|
}
|
|
|
|
/// EmitStoreOfComplex - Store a complex number into the specified l-value.
|
|
void CodeGenFunction::EmitStoreOfComplex(ComplexPairTy V, LValue dest,
|
|
bool isInit) {
|
|
ComplexExprEmitter(*this).EmitStoreOfComplex(V, dest, isInit);
|
|
}
|
|
|
|
/// EmitLoadOfComplex - Load a complex number from the specified address.
|
|
ComplexPairTy CodeGenFunction::EmitLoadOfComplex(LValue src,
|
|
SourceLocation loc) {
|
|
return ComplexExprEmitter(*this).EmitLoadOfLValue(src, loc);
|
|
}
|
|
|
|
LValue CodeGenFunction::EmitComplexAssignmentLValue(const BinaryOperator *E) {
|
|
assert(E->getOpcode() == BO_Assign);
|
|
ComplexPairTy Val; // ignored
|
|
return ComplexExprEmitter(*this).EmitBinAssignLValue(E, Val);
|
|
}
|
|
|
|
typedef ComplexPairTy (ComplexExprEmitter::*CompoundFunc)(
|
|
const ComplexExprEmitter::BinOpInfo &);
|
|
|
|
static CompoundFunc getComplexOp(BinaryOperatorKind Op) {
|
|
switch (Op) {
|
|
case BO_MulAssign: return &ComplexExprEmitter::EmitBinMul;
|
|
case BO_DivAssign: return &ComplexExprEmitter::EmitBinDiv;
|
|
case BO_SubAssign: return &ComplexExprEmitter::EmitBinSub;
|
|
case BO_AddAssign: return &ComplexExprEmitter::EmitBinAdd;
|
|
default:
|
|
llvm_unreachable("unexpected complex compound assignment");
|
|
}
|
|
}
|
|
|
|
LValue CodeGenFunction::
|
|
EmitComplexCompoundAssignmentLValue(const CompoundAssignOperator *E) {
|
|
CompoundFunc Op = getComplexOp(E->getOpcode());
|
|
RValue Val;
|
|
return ComplexExprEmitter(*this).EmitCompoundAssignLValue(E, Op, Val);
|
|
}
|
|
|
|
LValue CodeGenFunction::
|
|
EmitScalarCompooundAssignWithComplex(const CompoundAssignOperator *E,
|
|
llvm::Value *&Result) {
|
|
CompoundFunc Op = getComplexOp(E->getOpcode());
|
|
RValue Val;
|
|
LValue Ret = ComplexExprEmitter(*this).EmitCompoundAssignLValue(E, Op, Val);
|
|
Result = Val.getScalarVal();
|
|
return Ret;
|
|
}
|