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df0fe27b66
any body can spot codegen bugs with volatile, or knows of any in the bug database, let me know. llvm-svn: 72572
661 lines
25 KiB
C++
661 lines
25 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/Constants.h"
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#include "llvm/Function.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/Compiler.h"
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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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namespace {
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class VISIBILITY_HIDDEN 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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// True is we should ignore the value of a
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bool IgnoreReal;
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bool IgnoreImag;
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// True if we should ignore the value of a=b
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bool IgnoreRealAssign;
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bool IgnoreImagAssign;
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public:
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ComplexExprEmitter(CodeGenFunction &cgf, bool ir=false, bool ii=false,
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bool irn=false, bool iin=false)
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: CGF(cgf), Builder(CGF.Builder), IgnoreReal(ir), IgnoreImag(ii),
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IgnoreRealAssign(irn), IgnoreImagAssign(iin) {
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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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bool TestAndClearIgnoreRealAssign() {
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bool I = IgnoreRealAssign;
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IgnoreRealAssign = false;
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return I;
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}
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bool TestAndClearIgnoreImagAssign() {
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bool I = IgnoreImagAssign;
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IgnoreImagAssign = 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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LValue LV = CGF.EmitLValue(E);
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return EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified());
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}
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/// EmitLoadOfComplex - Given a pointer to a complex value, emit code to load
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/// the real and imaginary pieces.
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ComplexPairTy EmitLoadOfComplex(llvm::Value *SrcPtr, bool isVolatile);
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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, llvm::Value *ResPtr, bool isVol);
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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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//===--------------------------------------------------------------------===//
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// Visitor Methods
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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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assert(0 && "Stmt can't have complex result type!");
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return ComplexPairTy();
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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 VisitImaginaryLiteral(const ImaginaryLiteral *IL);
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// l-values.
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ComplexPairTy VisitDeclRefExpr(const Expr *E) { return EmitLoadOfLValue(E); }
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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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// FIXME: CompoundLiteralExpr
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ComplexPairTy EmitCast(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->getSubExpr(), E->getType());
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}
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ComplexPairTy VisitCastExpr(CastExpr *E) {
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return EmitCast(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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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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TestAndClearIgnoreRealAssign();
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TestAndClearIgnoreImagAssign();
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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 VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) {
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assert(E->getType()->isAnyComplexType() && "Expected complex type!");
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QualType Elem = E->getType()->getAsComplexType()->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()->getAsComplexType()->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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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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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 VisitBinMul(const BinaryOperator *E) {
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return EmitBinMul(EmitBinOps(E));
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}
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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 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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ComplexPairTy VisitBinAssign (const BinaryOperator *E);
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ComplexPairTy VisitBinComma (const BinaryOperator *E);
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ComplexPairTy VisitConditionalOperator(const ConditionalOperator *CO);
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ComplexPairTy VisitChooseExpr(ChooseExpr *CE);
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ComplexPairTy VisitInitListExpr(InitListExpr *E);
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ComplexPairTy VisitVAArgExpr(VAArgExpr *E);
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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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/// EmitLoadOfComplex - 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::EmitLoadOfComplex(llvm::Value *SrcPtr,
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bool isVolatile) {
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llvm::SmallString<64> Name(SrcPtr->getNameStart(),
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SrcPtr->getNameStart()+SrcPtr->getNameLen());
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llvm::Value *Real=0, *Imag=0;
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if (!IgnoreReal) {
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Name += ".realp";
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llvm::Value *RealPtr = Builder.CreateStructGEP(SrcPtr, 0, Name.c_str());
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Name.pop_back(); // .realp -> .real
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Real = Builder.CreateLoad(RealPtr, isVolatile, Name.c_str());
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Name.resize(Name.size()-4); // .real -> .imagp
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}
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if (!IgnoreImag) {
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Name += "imagp";
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llvm::Value *ImagPtr = Builder.CreateStructGEP(SrcPtr, 1, Name.c_str());
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Name.pop_back(); // .imagp -> .imag
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Imag = Builder.CreateLoad(ImagPtr, isVolatile, Name.c_str());
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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, llvm::Value *Ptr,
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bool isVolatile) {
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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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Builder.CreateStore(Val.first, RealPtr, isVolatile);
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Builder.CreateStore(Val.second, ImagPtr, isVolatile);
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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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const llvm::Type *EltTy =
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CGF.ConvertType(E->getType()->getAsComplexType()->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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return CGF.EmitCompoundStmt(*E->getSubStmt(), true).getComplexVal();
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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->getAsComplexType()->getElementType();
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DestType = DestType->getAsComplexType()->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::EmitCast(Expr *Op, QualType DestTy) {
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// Two cases here: cast from (complex to complex) and (scalar to complex).
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if (Op->getType()->isAnyComplexType())
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return EmitComplexToComplexCast(Visit(Op), Op->getType(), DestTy);
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// C99 6.3.1.7: When a value of real type is converted to a complex type, the
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// real part of the complex result value is determined by the rules of
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// conversion to the corresponding real type and the imaginary part of the
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// complex result value is a positive zero or an unsigned zero.
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llvm::Value *Elt = CGF.EmitScalarExpr(Op);
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// Convert the input element to the element type of the complex.
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DestTy = DestTy->getAsComplexType()->getElementType();
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Elt = CGF.EmitScalarConversion(Elt, Op->getType(), DestTy);
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// Return (realval, 0).
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return ComplexPairTy(Elt, llvm::Constant::getNullValue(Elt->getType()));
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}
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ComplexPairTy ComplexExprEmitter::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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ComplexPairTy InVal = EmitLoadOfComplex(LV.getAddress(), LV.isVolatileQualified());
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llvm::Value *NextVal;
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if (isa<llvm::IntegerType>(InVal.first->getType())) {
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uint64_t AmountVal = isInc ? 1 : -1;
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NextVal = llvm::ConstantInt::get(InVal.first->getType(), AmountVal, true);
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} else {
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QualType ElemTy = E->getType()->getAsComplexType()->getElementType();
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llvm::APFloat FVal(CGF.getContext().getFloatTypeSemantics(ElemTy), 1);
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if (!isInc)
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FVal.changeSign();
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NextVal = llvm::ConstantFP::get(FVal);
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}
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// Add the inc/dec to the real part.
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NextVal = Builder.CreateAdd(InVal.first, NextVal, isInc ? "inc" : "dec");
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ComplexPairTy IncVal(NextVal, InVal.second);
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// Store the updated result through the lvalue.
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EmitStoreOfComplex(IncVal, LV.getAddress(), LV.isVolatileQualified());
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// If this is a postinc, return the value read from memory, otherwise use the
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// updated value.
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return isPre ? IncVal : InVal;
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}
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ComplexPairTy ComplexExprEmitter::VisitUnaryMinus(const UnaryOperator *E) {
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TestAndClearIgnoreReal();
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TestAndClearIgnoreImag();
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TestAndClearIgnoreRealAssign();
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TestAndClearIgnoreImagAssign();
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ComplexPairTy Op = Visit(E->getSubExpr());
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llvm::Value *ResR = Builder.CreateNeg(Op.first, "neg.r");
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llvm::Value *ResI = Builder.CreateNeg(Op.second, "neg.i");
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return ComplexPairTy(ResR, ResI);
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}
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ComplexPairTy ComplexExprEmitter::VisitUnaryNot(const UnaryOperator *E) {
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TestAndClearIgnoreReal();
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TestAndClearIgnoreImag();
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TestAndClearIgnoreRealAssign();
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TestAndClearIgnoreImagAssign();
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// ~(a+ib) = a + i*-b
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ComplexPairTy Op = Visit(E->getSubExpr());
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llvm::Value *ResI = Builder.CreateNeg(Op.second, "conj.i");
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return ComplexPairTy(Op.first, ResI);
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}
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ComplexPairTy ComplexExprEmitter::EmitBinAdd(const BinOpInfo &Op) {
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llvm::Value *ResR = Builder.CreateAdd(Op.LHS.first, Op.RHS.first, "add.r");
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llvm::Value *ResI = Builder.CreateAdd(Op.LHS.second, Op.RHS.second, "add.i");
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return ComplexPairTy(ResR, ResI);
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}
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ComplexPairTy ComplexExprEmitter::EmitBinSub(const BinOpInfo &Op) {
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llvm::Value *ResR = Builder.CreateSub(Op.LHS.first, Op.RHS.first, "sub.r");
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llvm::Value *ResI = Builder.CreateSub(Op.LHS.second, Op.RHS.second, "sub.i");
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return ComplexPairTy(ResR, ResI);
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}
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ComplexPairTy ComplexExprEmitter::EmitBinMul(const BinOpInfo &Op) {
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llvm::Value *ResRl = Builder.CreateMul(Op.LHS.first, Op.RHS.first, "mul.rl");
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llvm::Value *ResRr = Builder.CreateMul(Op.LHS.second, Op.RHS.second,"mul.rr");
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llvm::Value *ResR = Builder.CreateSub(ResRl, ResRr, "mul.r");
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llvm::Value *ResIl = Builder.CreateMul(Op.LHS.second, Op.RHS.first, "mul.il");
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llvm::Value *ResIr = Builder.CreateMul(Op.LHS.first, Op.RHS.second, "mul.ir");
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llvm::Value *ResI = Builder.CreateAdd(ResIl, ResIr, "mul.i");
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return ComplexPairTy(ResR, ResI);
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}
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ComplexPairTy ComplexExprEmitter::EmitBinDiv(const BinOpInfo &Op) {
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llvm::Value *LHSr = Op.LHS.first, *LHSi = Op.LHS.second;
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llvm::Value *RHSr = Op.RHS.first, *RHSi = Op.RHS.second;
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// (a+ib) / (c+id) = ((ac+bd)/(cc+dd)) + i((bc-ad)/(cc+dd))
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llvm::Value *Tmp1 = Builder.CreateMul(LHSr, RHSr, "tmp"); // a*c
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llvm::Value *Tmp2 = Builder.CreateMul(LHSi, RHSi, "tmp"); // b*d
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llvm::Value *Tmp3 = Builder.CreateAdd(Tmp1, Tmp2, "tmp"); // ac+bd
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llvm::Value *Tmp4 = Builder.CreateMul(RHSr, RHSr, "tmp"); // c*c
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llvm::Value *Tmp5 = Builder.CreateMul(RHSi, RHSi, "tmp"); // d*d
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llvm::Value *Tmp6 = Builder.CreateAdd(Tmp4, Tmp5, "tmp"); // cc+dd
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llvm::Value *Tmp7 = Builder.CreateMul(LHSi, RHSr, "tmp"); // b*c
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llvm::Value *Tmp8 = Builder.CreateMul(LHSr, RHSi, "tmp"); // a*d
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llvm::Value *Tmp9 = Builder.CreateSub(Tmp7, Tmp8, "tmp"); // bc-ad
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llvm::Value *DSTr, *DSTi;
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if (Tmp3->getType()->isFloatingPoint()) {
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DSTr = Builder.CreateFDiv(Tmp3, Tmp6, "tmp");
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DSTi = Builder.CreateFDiv(Tmp9, Tmp6, "tmp");
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} else {
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if (Op.Ty->getAsComplexType()->getElementType()->isUnsignedIntegerType()) {
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DSTr = Builder.CreateUDiv(Tmp3, Tmp6, "tmp");
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DSTi = Builder.CreateUDiv(Tmp9, Tmp6, "tmp");
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} else {
|
|
DSTr = Builder.CreateSDiv(Tmp3, Tmp6, "tmp");
|
|
DSTi = Builder.CreateSDiv(Tmp9, Tmp6, "tmp");
|
|
}
|
|
}
|
|
|
|
return ComplexPairTy(DSTr, DSTi);
|
|
}
|
|
|
|
ComplexExprEmitter::BinOpInfo
|
|
ComplexExprEmitter::EmitBinOps(const BinaryOperator *E) {
|
|
TestAndClearIgnoreReal();
|
|
TestAndClearIgnoreImag();
|
|
TestAndClearIgnoreRealAssign();
|
|
TestAndClearIgnoreImagAssign();
|
|
BinOpInfo Ops;
|
|
Ops.LHS = Visit(E->getLHS());
|
|
Ops.RHS = Visit(E->getRHS());
|
|
Ops.Ty = E->getType();
|
|
return Ops;
|
|
}
|
|
|
|
|
|
// Compound assignments.
|
|
ComplexPairTy ComplexExprEmitter::
|
|
EmitCompoundAssign(const CompoundAssignOperator *E,
|
|
ComplexPairTy (ComplexExprEmitter::*Func)(const BinOpInfo&)){
|
|
TestAndClearIgnoreReal();
|
|
TestAndClearIgnoreImag();
|
|
bool ignreal = TestAndClearIgnoreRealAssign();
|
|
bool ignimag = TestAndClearIgnoreImagAssign();
|
|
QualType LHSTy = E->getLHS()->getType(), RHSTy = E->getRHS()->getType();
|
|
|
|
BinOpInfo OpInfo;
|
|
|
|
// Load the RHS and LHS operands.
|
|
// __block variables need to have the rhs evaluated first, plus this should
|
|
// improve codegen a little. It is possible for the RHS to be complex or
|
|
// scalar.
|
|
OpInfo.Ty = E->getComputationResultType();
|
|
OpInfo.RHS = EmitCast(E->getRHS(), OpInfo.Ty);
|
|
|
|
LValue LHSLV = CGF.EmitLValue(E->getLHS());
|
|
|
|
|
|
// We know the LHS is a complex lvalue.
|
|
OpInfo.LHS=EmitLoadOfComplex(LHSLV.getAddress(),LHSLV.isVolatileQualified());
|
|
OpInfo.LHS=EmitComplexToComplexCast(OpInfo.LHS, LHSTy, OpInfo.Ty);
|
|
|
|
// Expand the binary operator.
|
|
ComplexPairTy Result = (this->*Func)(OpInfo);
|
|
|
|
// Truncate the result back to the LHS type.
|
|
Result = EmitComplexToComplexCast(Result, OpInfo.Ty, LHSTy);
|
|
|
|
// Store the result value into the LHS lvalue.
|
|
EmitStoreOfComplex(Result, LHSLV.getAddress(), LHSLV.isVolatileQualified());
|
|
// And now return the LHS
|
|
IgnoreReal = ignreal;
|
|
IgnoreImag = ignimag;
|
|
IgnoreRealAssign = ignreal;
|
|
IgnoreImagAssign = ignimag;
|
|
return EmitLoadOfComplex(LHSLV.getAddress(), LHSLV.isVolatileQualified());
|
|
}
|
|
|
|
ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) {
|
|
TestAndClearIgnoreReal();
|
|
TestAndClearIgnoreImag();
|
|
bool ignreal = TestAndClearIgnoreRealAssign();
|
|
bool ignimag = TestAndClearIgnoreImagAssign();
|
|
assert(CGF.getContext().getCanonicalType(E->getLHS()->getType()) ==
|
|
CGF.getContext().getCanonicalType(E->getRHS()->getType()) &&
|
|
"Invalid assignment");
|
|
// Emit the RHS.
|
|
ComplexPairTy Val = Visit(E->getRHS());
|
|
|
|
// Compute the address to store into.
|
|
LValue LHS = CGF.EmitLValue(E->getLHS());
|
|
|
|
// Store into it.
|
|
EmitStoreOfComplex(Val, LHS.getAddress(), LHS.isVolatileQualified());
|
|
// And now return the LHS
|
|
IgnoreReal = ignreal;
|
|
IgnoreImag = ignimag;
|
|
IgnoreRealAssign = ignreal;
|
|
IgnoreImagAssign = ignimag;
|
|
return EmitLoadOfComplex(LHS.getAddress(), LHS.isVolatileQualified());
|
|
}
|
|
|
|
ComplexPairTy ComplexExprEmitter::VisitBinComma(const BinaryOperator *E) {
|
|
CGF.EmitStmt(E->getLHS());
|
|
CGF.EnsureInsertPoint();
|
|
return Visit(E->getRHS());
|
|
}
|
|
|
|
ComplexPairTy ComplexExprEmitter::
|
|
VisitConditionalOperator(const ConditionalOperator *E) {
|
|
TestAndClearIgnoreReal();
|
|
TestAndClearIgnoreImag();
|
|
TestAndClearIgnoreRealAssign();
|
|
TestAndClearIgnoreImagAssign();
|
|
llvm::BasicBlock *LHSBlock = CGF.createBasicBlock("cond.true");
|
|
llvm::BasicBlock *RHSBlock = CGF.createBasicBlock("cond.false");
|
|
llvm::BasicBlock *ContBlock = CGF.createBasicBlock("cond.end");
|
|
|
|
llvm::Value *Cond = CGF.EvaluateExprAsBool(E->getCond());
|
|
Builder.CreateCondBr(Cond, LHSBlock, RHSBlock);
|
|
|
|
CGF.EmitBlock(LHSBlock);
|
|
|
|
// Handle the GNU extension for missing LHS.
|
|
assert(E->getLHS() && "Must have LHS for complex value");
|
|
|
|
ComplexPairTy LHS = Visit(E->getLHS());
|
|
LHSBlock = Builder.GetInsertBlock();
|
|
CGF.EmitBranch(ContBlock);
|
|
|
|
CGF.EmitBlock(RHSBlock);
|
|
|
|
ComplexPairTy RHS = Visit(E->getRHS());
|
|
RHSBlock = Builder.GetInsertBlock();
|
|
CGF.EmitBranch(ContBlock);
|
|
|
|
CGF.EmitBlock(ContBlock);
|
|
|
|
// Create a PHI node for the real part.
|
|
llvm::PHINode *RealPN = Builder.CreatePHI(LHS.first->getType(), "cond.r");
|
|
RealPN->reserveOperandSpace(2);
|
|
RealPN->addIncoming(LHS.first, LHSBlock);
|
|
RealPN->addIncoming(RHS.first, RHSBlock);
|
|
|
|
// Create a PHI node for the imaginary part.
|
|
llvm::PHINode *ImagPN = Builder.CreatePHI(LHS.first->getType(), "cond.i");
|
|
ImagPN->reserveOperandSpace(2);
|
|
ImagPN->addIncoming(LHS.second, LHSBlock);
|
|
ImagPN->addIncoming(RHS.second, RHSBlock);
|
|
|
|
return ComplexPairTy(RealPN, ImagPN);
|
|
}
|
|
|
|
ComplexPairTy ComplexExprEmitter::VisitChooseExpr(ChooseExpr *E) {
|
|
return Visit(E->getChosenSubExpr(CGF.getContext()));
|
|
}
|
|
|
|
ComplexPairTy ComplexExprEmitter::VisitInitListExpr(InitListExpr *E) {
|
|
bool Ignore = TestAndClearIgnoreReal();
|
|
(void)Ignore;
|
|
assert (Ignore == false && "init list ignored");
|
|
Ignore = TestAndClearIgnoreImag();
|
|
(void)Ignore;
|
|
assert (Ignore == false && "init list ignored");
|
|
if (E->getNumInits())
|
|
return Visit(E->getInit(0));
|
|
|
|
// Empty init list intializes to null
|
|
QualType Ty = E->getType()->getAsComplexType()->getElementType();
|
|
const llvm::Type* LTy = CGF.ConvertType(Ty);
|
|
llvm::Value* zeroConstant = llvm::Constant::getNullValue(LTy);
|
|
return ComplexPairTy(zeroConstant, zeroConstant);
|
|
}
|
|
|
|
ComplexPairTy ComplexExprEmitter::VisitVAArgExpr(VAArgExpr *E) {
|
|
llvm::Value *ArgValue = CGF.EmitVAListRef(E->getSubExpr());
|
|
llvm::Value *ArgPtr = CGF.EmitVAArg(ArgValue, E->getType());
|
|
|
|
if (!ArgPtr) {
|
|
CGF.ErrorUnsupported(E, "complex va_arg expression");
|
|
const llvm::Type *EltTy =
|
|
CGF.ConvertType(E->getType()->getAsComplexType()->getElementType());
|
|
llvm::Value *U = llvm::UndefValue::get(EltTy);
|
|
return ComplexPairTy(U, U);
|
|
}
|
|
|
|
// FIXME Volatility.
|
|
return EmitLoadOfComplex(ArgPtr, false);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Entry Point into this File
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// EmitComplexExpr - Emit the computation of the specified expression of
|
|
/// complex type, ignoring the result.
|
|
ComplexPairTy CodeGenFunction::EmitComplexExpr(const Expr *E, bool IgnoreReal,
|
|
bool IgnoreImag, bool IgnoreRealAssign, bool IgnoreImagAssign) {
|
|
assert(E && E->getType()->isAnyComplexType() &&
|
|
"Invalid complex expression to emit");
|
|
|
|
return ComplexExprEmitter(*this, IgnoreReal, IgnoreImag, IgnoreRealAssign,
|
|
IgnoreImagAssign)
|
|
.Visit(const_cast<Expr*>(E));
|
|
}
|
|
|
|
/// EmitComplexExprIntoAddr - Emit the computation of the specified expression
|
|
/// of complex type, storing into the specified Value*.
|
|
void CodeGenFunction::EmitComplexExprIntoAddr(const Expr *E,
|
|
llvm::Value *DestAddr,
|
|
bool DestIsVolatile) {
|
|
assert(E && E->getType()->isAnyComplexType() &&
|
|
"Invalid complex expression to emit");
|
|
ComplexExprEmitter Emitter(*this);
|
|
ComplexPairTy Val = Emitter.Visit(const_cast<Expr*>(E));
|
|
Emitter.EmitStoreOfComplex(Val, DestAddr, DestIsVolatile);
|
|
}
|
|
|
|
/// StoreComplexToAddr - Store a complex number into the specified address.
|
|
void CodeGenFunction::StoreComplexToAddr(ComplexPairTy V,
|
|
llvm::Value *DestAddr,
|
|
bool DestIsVolatile) {
|
|
ComplexExprEmitter(*this).EmitStoreOfComplex(V, DestAddr, DestIsVolatile);
|
|
}
|
|
|
|
/// LoadComplexFromAddr - Load a complex number from the specified address.
|
|
ComplexPairTy CodeGenFunction::LoadComplexFromAddr(llvm::Value *SrcAddr,
|
|
bool SrcIsVolatile) {
|
|
return ComplexExprEmitter(*this).EmitLoadOfComplex(SrcAddr, SrcIsVolatile);
|
|
}
|