| //===--- Expr.h - Classes for representing expressions ----------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the Expr interface and subclasses. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_AST_EXPR_H |
| #define LLVM_CLANG_AST_EXPR_H |
| |
| #include "clang/AST/Stmt.h" |
| #include "clang/AST/Type.h" |
| #include "llvm/ADT/APSInt.h" |
| #include "llvm/ADT/APFloat.h" |
| #include "llvm/ADT/SmallVector.h" |
| #include <vector> |
| |
| namespace clang { |
| class ASTContext; |
| class APValue; |
| class Decl; |
| class IdentifierInfo; |
| class ParmVarDecl; |
| class NamedDecl; |
| class ValueDecl; |
| class BlockDecl; |
| |
| /// Expr - This represents one expression. Note that Expr's are subclasses of |
| /// Stmt. This allows an expression to be transparently used any place a Stmt |
| /// is required. |
| /// |
| class Expr : public Stmt { |
| QualType TR; |
| protected: |
| Expr(StmtClass SC, QualType T) : Stmt(SC), TR(T) {} |
| public: |
| QualType getType() const { return TR; } |
| void setType(QualType t) { TR = t; } |
| |
| /// SourceLocation tokens are not useful in isolation - they are low level |
| /// value objects created/interpreted by SourceManager. We assume AST |
| /// clients will have a pointer to the respective SourceManager. |
| virtual SourceRange getSourceRange() const = 0; |
| |
| /// getExprLoc - Return the preferred location for the arrow when diagnosing |
| /// a problem with a generic expression. |
| virtual SourceLocation getExprLoc() const { return getLocStart(); } |
| |
| /// hasLocalSideEffect - Return true if this immediate expression has side |
| /// effects, not counting any sub-expressions. |
| bool hasLocalSideEffect() const; |
| |
| /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or |
| /// incomplete type other than void. Nonarray expressions that can be lvalues: |
| /// - name, where name must be a variable |
| /// - e[i] |
| /// - (e), where e must be an lvalue |
| /// - e.name, where e must be an lvalue |
| /// - e->name |
| /// - *e, the type of e cannot be a function type |
| /// - string-constant |
| /// - reference type [C++ [expr]] |
| /// |
| enum isLvalueResult { |
| LV_Valid, |
| LV_NotObjectType, |
| LV_IncompleteVoidType, |
| LV_DuplicateVectorComponents, |
| LV_InvalidExpression |
| }; |
| isLvalueResult isLvalue(ASTContext &Ctx) const; |
| |
| /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, |
| /// does not have an incomplete type, does not have a const-qualified type, |
| /// and if it is a structure or union, does not have any member (including, |
| /// recursively, any member or element of all contained aggregates or unions) |
| /// with a const-qualified type. |
| enum isModifiableLvalueResult { |
| MLV_Valid, |
| MLV_NotObjectType, |
| MLV_IncompleteVoidType, |
| MLV_DuplicateVectorComponents, |
| MLV_InvalidExpression, |
| MLV_IncompleteType, |
| MLV_ConstQualified, |
| MLV_ArrayType, |
| MLV_NotBlockQualified |
| }; |
| isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx) const; |
| |
| bool isNullPointerConstant(ASTContext &Ctx) const; |
| |
| /// getIntegerConstantExprValue() - Return the value of an integer |
| /// constant expression. The expression must be a valid integer |
| /// constant expression as determined by isIntegerConstantExpr. |
| llvm::APSInt getIntegerConstantExprValue(ASTContext &Ctx) const { |
| llvm::APSInt X; |
| bool success = isIntegerConstantExpr(X, Ctx); |
| success = success; |
| assert(success && "Illegal argument to getIntegerConstantExpr"); |
| return X; |
| } |
| |
| /// isIntegerConstantExpr - Return true if this expression is a valid integer |
| /// constant expression, and, if so, return its value in Result. If not a |
| /// valid i-c-e, return false and fill in Loc (if specified) with the location |
| /// of the invalid expression. |
| bool isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, |
| SourceLocation *Loc = 0, |
| bool isEvaluated = true) const; |
| bool isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc = 0) const { |
| llvm::APSInt X; |
| return isIntegerConstantExpr(X, Ctx, Loc); |
| } |
| /// isConstantExpr - Return true if this expression is a valid constant expr. |
| bool isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const; |
| |
| /// tryEvaluate - Return true if this is a constant which we can fold using |
| /// any crazy technique (that has nothing to do with language standards) that |
| /// we want to. If this function returns true, it returns the folded constant |
| /// in Result. |
| bool tryEvaluate(APValue& Result, ASTContext &Ctx) const; |
| |
| /// isEvaluatable - Call tryEvaluate to see if this expression can be constant |
| /// folded, but discard the result. |
| bool isEvaluatable(ASTContext &Ctx) const; |
| |
| /// hasGlobalStorage - Return true if this expression has static storage |
| /// duration. This means that the address of this expression is a link-time |
| /// constant. |
| bool hasGlobalStorage() const; |
| |
| /// IgnoreParens - Ignore parentheses. If this Expr is a ParenExpr, return |
| /// its subexpression. If that subexpression is also a ParenExpr, |
| /// then this method recursively returns its subexpression, and so forth. |
| /// Otherwise, the method returns the current Expr. |
| Expr* IgnoreParens(); |
| |
| /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr |
| /// or CastExprs or ImplicitCastExprs, returning their operand. |
| Expr *IgnoreParenCasts(); |
| |
| const Expr* IgnoreParens() const { |
| return const_cast<Expr*>(this)->IgnoreParens(); |
| } |
| const Expr *IgnoreParenCasts() const { |
| return const_cast<Expr*>(this)->IgnoreParenCasts(); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() >= firstExprConstant && |
| T->getStmtClass() <= lastExprConstant; |
| } |
| static bool classof(const Expr *) { return true; } |
| |
| static inline Expr* Create(llvm::Deserializer& D, ASTContext& C) { |
| return cast<Expr>(Stmt::Create(D, C)); |
| } |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // ExprIterator - Iterators for iterating over Stmt* arrays that contain |
| // only Expr*. This is needed because AST nodes use Stmt* arrays to store |
| // references to children (to be compatible with StmtIterator). |
| //===----------------------------------------------------------------------===// |
| |
| class ExprIterator { |
| Stmt** I; |
| public: |
| ExprIterator(Stmt** i) : I(i) {} |
| ExprIterator() : I(0) {} |
| ExprIterator& operator++() { ++I; return *this; } |
| ExprIterator operator-(size_t i) { return I-i; } |
| ExprIterator operator+(size_t i) { return I+i; } |
| Expr* operator[](size_t idx) { return cast<Expr>(I[idx]); } |
| // FIXME: Verify that this will correctly return a signed distance. |
| signed operator-(const ExprIterator& R) const { return I - R.I; } |
| Expr* operator*() const { return cast<Expr>(*I); } |
| Expr* operator->() const { return cast<Expr>(*I); } |
| bool operator==(const ExprIterator& R) const { return I == R.I; } |
| bool operator!=(const ExprIterator& R) const { return I != R.I; } |
| bool operator>(const ExprIterator& R) const { return I > R.I; } |
| bool operator>=(const ExprIterator& R) const { return I >= R.I; } |
| }; |
| |
| class ConstExprIterator { |
| Stmt* const * I; |
| public: |
| ConstExprIterator(Stmt* const* i) : I(i) {} |
| ConstExprIterator() : I(0) {} |
| ConstExprIterator& operator++() { ++I; return *this; } |
| ConstExprIterator operator+(size_t i) { return I+i; } |
| ConstExprIterator operator-(size_t i) { return I-i; } |
| Expr * operator[](size_t idx) const { return cast<Expr>(I[idx]); } |
| signed operator-(const ConstExprIterator& R) const { return I - R.I; } |
| Expr * operator*() const { return cast<Expr>(*I); } |
| Expr * operator->() const { return cast<Expr>(*I); } |
| bool operator==(const ConstExprIterator& R) const { return I == R.I; } |
| bool operator!=(const ConstExprIterator& R) const { return I != R.I; } |
| bool operator>(const ConstExprIterator& R) const { return I > R.I; } |
| bool operator>=(const ConstExprIterator& R) const { return I >= R.I; } |
| }; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Primary Expressions. |
| //===----------------------------------------------------------------------===// |
| |
| /// DeclRefExpr - [C99 6.5.1p2] - A reference to a declared variable, function, |
| /// enum, etc. |
| class DeclRefExpr : public Expr { |
| NamedDecl *D; |
| SourceLocation Loc; |
| |
| protected: |
| DeclRefExpr(StmtClass SC, NamedDecl *d, QualType t, SourceLocation l) : |
| Expr(SC, t), D(d), Loc(l) {} |
| |
| public: |
| DeclRefExpr(NamedDecl *d, QualType t, SourceLocation l) : |
| Expr(DeclRefExprClass, t), D(d), Loc(l) {} |
| |
| NamedDecl *getDecl() { return D; } |
| const NamedDecl *getDecl() const { return D; } |
| SourceLocation getLocation() const { return Loc; } |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == DeclRefExprClass || |
| T->getStmtClass() == CXXConditionDeclExprClass; |
| } |
| static bool classof(const DeclRefExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static DeclRefExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// PredefinedExpr - [C99 6.4.2.2] - A predefined identifier such as __func__. |
| class PredefinedExpr : public Expr { |
| public: |
| enum IdentType { |
| Func, |
| Function, |
| PrettyFunction, |
| CXXThis, |
| ObjCSuper // super |
| }; |
| |
| private: |
| SourceLocation Loc; |
| IdentType Type; |
| public: |
| PredefinedExpr(SourceLocation l, QualType type, IdentType IT) |
| : Expr(PredefinedExprClass, type), Loc(l), Type(IT) {} |
| |
| IdentType getIdentType() const { return Type; } |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == PredefinedExprClass; |
| } |
| static bool classof(const PredefinedExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static PredefinedExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| class IntegerLiteral : public Expr { |
| llvm::APInt Value; |
| SourceLocation Loc; |
| public: |
| // type should be IntTy, LongTy, LongLongTy, UnsignedIntTy, UnsignedLongTy, |
| // or UnsignedLongLongTy |
| IntegerLiteral(const llvm::APInt &V, QualType type, SourceLocation l) |
| : Expr(IntegerLiteralClass, type), Value(V), Loc(l) { |
| assert(type->isIntegerType() && "Illegal type in IntegerLiteral"); |
| } |
| const llvm::APInt &getValue() const { return Value; } |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == IntegerLiteralClass; |
| } |
| static bool classof(const IntegerLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static IntegerLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| class CharacterLiteral : public Expr { |
| unsigned Value; |
| SourceLocation Loc; |
| bool IsWide; |
| public: |
| // type should be IntTy |
| CharacterLiteral(unsigned value, bool iswide, QualType type, SourceLocation l) |
| : Expr(CharacterLiteralClass, type), Value(value), Loc(l), IsWide(iswide) { |
| } |
| SourceLocation getLoc() const { return Loc; } |
| bool isWide() const { return IsWide; } |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| unsigned getValue() const { return Value; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CharacterLiteralClass; |
| } |
| static bool classof(const CharacterLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static CharacterLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| class FloatingLiteral : public Expr { |
| llvm::APFloat Value; |
| bool IsExact : 1; |
| SourceLocation Loc; |
| public: |
| FloatingLiteral(const llvm::APFloat &V, bool* isexact, |
| QualType Type, SourceLocation L) |
| : Expr(FloatingLiteralClass, Type), Value(V), IsExact(*isexact), Loc(L) {} |
| |
| const llvm::APFloat &getValue() const { return Value; } |
| |
| bool isExact() const { return IsExact; } |
| |
| /// getValueAsApproximateDouble - This returns the value as an inaccurate |
| /// double. Note that this may cause loss of precision, but is useful for |
| /// debugging dumps, etc. |
| double getValueAsApproximateDouble() const; |
| |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == FloatingLiteralClass; |
| } |
| static bool classof(const FloatingLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static FloatingLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// ImaginaryLiteral - We support imaginary integer and floating point literals, |
| /// like "1.0i". We represent these as a wrapper around FloatingLiteral and |
| /// IntegerLiteral classes. Instances of this class always have a Complex type |
| /// whose element type matches the subexpression. |
| /// |
| class ImaginaryLiteral : public Expr { |
| Stmt *Val; |
| public: |
| ImaginaryLiteral(Expr *val, QualType Ty) |
| : Expr(ImaginaryLiteralClass, Ty), Val(val) {} |
| |
| const Expr *getSubExpr() const { return cast<Expr>(Val); } |
| Expr *getSubExpr() { return cast<Expr>(Val); } |
| |
| virtual SourceRange getSourceRange() const { return Val->getSourceRange(); } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ImaginaryLiteralClass; |
| } |
| static bool classof(const ImaginaryLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ImaginaryLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// StringLiteral - This represents a string literal expression, e.g. "foo" |
| /// or L"bar" (wide strings). The actual string is returned by getStrData() |
| /// is NOT null-terminated, and the length of the string is determined by |
| /// calling getByteLength(). The C type for a string is always a |
| /// ConstantArrayType. |
| class StringLiteral : public Expr { |
| const char *StrData; |
| unsigned ByteLength; |
| bool IsWide; |
| // if the StringLiteral was composed using token pasting, both locations |
| // are needed. If not (the common case), firstTokLoc == lastTokLoc. |
| // FIXME: if space becomes an issue, we should create a sub-class. |
| SourceLocation firstTokLoc, lastTokLoc; |
| public: |
| StringLiteral(const char *strData, unsigned byteLength, bool Wide, |
| QualType t, SourceLocation b, SourceLocation e); |
| virtual ~StringLiteral(); |
| |
| const char *getStrData() const { return StrData; } |
| unsigned getByteLength() const { return ByteLength; } |
| bool isWide() const { return IsWide; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(firstTokLoc,lastTokLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == StringLiteralClass; |
| } |
| static bool classof(const StringLiteral *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static StringLiteral* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// ParenExpr - This represents a parethesized expression, e.g. "(1)". This |
| /// AST node is only formed if full location information is requested. |
| class ParenExpr : public Expr { |
| SourceLocation L, R; |
| Stmt *Val; |
| public: |
| ParenExpr(SourceLocation l, SourceLocation r, Expr *val) |
| : Expr(ParenExprClass, val->getType()), L(l), R(r), Val(val) {} |
| |
| const Expr *getSubExpr() const { return cast<Expr>(Val); } |
| Expr *getSubExpr() { return cast<Expr>(Val); } |
| virtual SourceRange getSourceRange() const { return SourceRange(L, R); } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ParenExprClass; |
| } |
| static bool classof(const ParenExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ParenExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| |
| /// UnaryOperator - This represents the unary-expression's (except sizeof of |
| /// types), the postinc/postdec operators from postfix-expression, and various |
| /// extensions. |
| /// |
| /// Notes on various nodes: |
| /// |
| /// Real/Imag - These return the real/imag part of a complex operand. If |
| /// applied to a non-complex value, the former returns its operand and the |
| /// later returns zero in the type of the operand. |
| /// |
| /// __builtin_offsetof(type, a.b[10]) is represented as a unary operator whose |
| /// subexpression is a compound literal with the various MemberExpr and |
| /// ArraySubscriptExpr's applied to it. |
| /// |
| class UnaryOperator : public Expr { |
| public: |
| // Note that additions to this should also update the StmtVisitor class. |
| enum Opcode { |
| PostInc, PostDec, // [C99 6.5.2.4] Postfix increment and decrement operators |
| PreInc, PreDec, // [C99 6.5.3.1] Prefix increment and decrement operators. |
| AddrOf, Deref, // [C99 6.5.3.2] Address and indirection operators. |
| Plus, Minus, // [C99 6.5.3.3] Unary arithmetic operators. |
| Not, LNot, // [C99 6.5.3.3] Unary arithmetic operators. |
| SizeOf, AlignOf, // [C99 6.5.3.4] Sizeof (expr, not type) operator. |
| Real, Imag, // "__real expr"/"__imag expr" Extension. |
| Extension, // __extension__ marker. |
| OffsetOf // __builtin_offsetof |
| }; |
| private: |
| Stmt *Val; |
| Opcode Opc; |
| SourceLocation Loc; |
| public: |
| |
| UnaryOperator(Expr *input, Opcode opc, QualType type, SourceLocation l) |
| : Expr(UnaryOperatorClass, type), Val(input), Opc(opc), Loc(l) {} |
| |
| Opcode getOpcode() const { return Opc; } |
| Expr *getSubExpr() const { return cast<Expr>(Val); } |
| |
| /// getOperatorLoc - Return the location of the operator. |
| SourceLocation getOperatorLoc() const { return Loc; } |
| |
| /// isPostfix - Return true if this is a postfix operation, like x++. |
| static bool isPostfix(Opcode Op); |
| |
| /// isPostfix - Return true if this is a prefix operation, like --x. |
| static bool isPrefix(Opcode Op); |
| |
| bool isPrefix() const { return isPrefix(Opc); } |
| bool isPostfix() const { return isPostfix(Opc); } |
| bool isIncrementOp() const {return Opc==PreInc || Opc==PostInc; } |
| bool isIncrementDecrementOp() const { return Opc>=PostInc && Opc<=PreDec; } |
| bool isSizeOfAlignOfOp() const { return Opc == SizeOf || Opc == AlignOf; } |
| bool isOffsetOfOp() const { return Opc == OffsetOf; } |
| static bool isArithmeticOp(Opcode Op) { return Op >= Plus && Op <= LNot; } |
| |
| /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| /// corresponds to, e.g. "sizeof" or "[pre]++" |
| static const char *getOpcodeStr(Opcode Op); |
| |
| virtual SourceRange getSourceRange() const { |
| if (isPostfix()) |
| return SourceRange(Val->getLocStart(), Loc); |
| else |
| return SourceRange(Loc, Val->getLocEnd()); |
| } |
| virtual SourceLocation getExprLoc() const { return Loc; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == UnaryOperatorClass; |
| } |
| static bool classof(const UnaryOperator *) { return true; } |
| |
| int64_t evaluateOffsetOf(ASTContext& C) const; |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static UnaryOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// SizeOfAlignOfTypeExpr - [C99 6.5.3.4] - This is only for sizeof/alignof of |
| /// *types*. sizeof(expr) is handled by UnaryOperator. |
| class SizeOfAlignOfTypeExpr : public Expr { |
| bool isSizeof; // true if sizeof, false if alignof. |
| QualType Ty; |
| SourceLocation OpLoc, RParenLoc; |
| public: |
| SizeOfAlignOfTypeExpr(bool issizeof, QualType argType, QualType resultType, |
| SourceLocation op, SourceLocation rp) : |
| Expr(SizeOfAlignOfTypeExprClass, resultType), |
| isSizeof(issizeof), Ty(argType), OpLoc(op), RParenLoc(rp) {} |
| |
| virtual void Destroy(ASTContext& C); |
| |
| bool isSizeOf() const { return isSizeof; } |
| QualType getArgumentType() const { return Ty; } |
| |
| SourceLocation getOperatorLoc() const { return OpLoc; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(OpLoc, RParenLoc); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == SizeOfAlignOfTypeExprClass; |
| } |
| static bool classof(const SizeOfAlignOfTypeExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static SizeOfAlignOfTypeExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // Postfix Operators. |
| //===----------------------------------------------------------------------===// |
| |
| /// ArraySubscriptExpr - [C99 6.5.2.1] Array Subscripting. |
| class ArraySubscriptExpr : public Expr { |
| enum { LHS, RHS, END_EXPR=2 }; |
| Stmt* SubExprs[END_EXPR]; |
| SourceLocation RBracketLoc; |
| public: |
| ArraySubscriptExpr(Expr *lhs, Expr *rhs, QualType t, |
| SourceLocation rbracketloc) |
| : Expr(ArraySubscriptExprClass, t), RBracketLoc(rbracketloc) { |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| /// An array access can be written A[4] or 4[A] (both are equivalent). |
| /// - getBase() and getIdx() always present the normalized view: A[4]. |
| /// In this case getBase() returns "A" and getIdx() returns "4". |
| /// - getLHS() and getRHS() present the syntactic view. e.g. for |
| /// 4[A] getLHS() returns "4". |
| /// Note: Because vector element access is also written A[4] we must |
| /// predicate the format conversion in getBase and getIdx only on the |
| /// the type of the RHS, as it is possible for the LHS to be a vector of |
| /// integer type |
| Expr *getLHS() { return cast<Expr>(SubExprs[LHS]); } |
| const Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
| |
| Expr *getRHS() { return cast<Expr>(SubExprs[RHS]); } |
| const Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| |
| Expr *getBase() { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); |
| } |
| |
| const Expr *getBase() const { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getLHS():getRHS()); |
| } |
| |
| Expr *getIdx() { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); |
| } |
| |
| const Expr *getIdx() const { |
| return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS()); |
| } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getLHS()->getLocStart(), RBracketLoc); |
| } |
| |
| virtual SourceLocation getExprLoc() const { return RBracketLoc; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ArraySubscriptExprClass; |
| } |
| static bool classof(const ArraySubscriptExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ArraySubscriptExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| |
| /// CallExpr - [C99 6.5.2.2] Function Calls. |
| /// |
| class CallExpr : public Expr { |
| enum { FN=0, ARGS_START=1 }; |
| Stmt **SubExprs; |
| unsigned NumArgs; |
| SourceLocation RParenLoc; |
| |
| // This version of the ctor is for deserialization. |
| CallExpr(Stmt** subexprs, unsigned numargs, QualType t, |
| SourceLocation rparenloc) |
| : Expr(CallExprClass,t), SubExprs(subexprs), |
| NumArgs(numargs), RParenLoc(rparenloc) {} |
| |
| public: |
| CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, |
| SourceLocation rparenloc); |
| ~CallExpr() { |
| delete [] SubExprs; |
| } |
| |
| const Expr *getCallee() const { return cast<Expr>(SubExprs[FN]); } |
| Expr *getCallee() { return cast<Expr>(SubExprs[FN]); } |
| void setCallee(Expr *F) { SubExprs[FN] = F; } |
| |
| /// getNumArgs - Return the number of actual arguments to this call. |
| /// |
| unsigned getNumArgs() const { return NumArgs; } |
| |
| /// getArg - Return the specified argument. |
| Expr *getArg(unsigned Arg) { |
| assert(Arg < NumArgs && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Arg+ARGS_START]); |
| } |
| const Expr *getArg(unsigned Arg) const { |
| assert(Arg < NumArgs && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Arg+ARGS_START]); |
| } |
| /// setArg - Set the specified argument. |
| void setArg(unsigned Arg, Expr *ArgExpr) { |
| assert(Arg < NumArgs && "Arg access out of range!"); |
| SubExprs[Arg+ARGS_START] = ArgExpr; |
| } |
| |
| /// setNumArgs - This changes the number of arguments present in this call. |
| /// Any orphaned expressions are deleted by this, and any new operands are set |
| /// to null. |
| void setNumArgs(unsigned NumArgs); |
| |
| typedef ExprIterator arg_iterator; |
| typedef ConstExprIterator const_arg_iterator; |
| |
| arg_iterator arg_begin() { return SubExprs+ARGS_START; } |
| arg_iterator arg_end() { return SubExprs+ARGS_START+getNumArgs(); } |
| const_arg_iterator arg_begin() const { return SubExprs+ARGS_START; } |
| const_arg_iterator arg_end() const { return SubExprs+ARGS_START+getNumArgs();} |
| |
| /// getNumCommas - Return the number of commas that must have been present in |
| /// this function call. |
| unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; } |
| |
| /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If |
| /// not, return 0. |
| unsigned isBuiltinCall() const; |
| |
| SourceLocation getRParenLoc() const { return RParenLoc; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getCallee()->getLocStart(), RParenLoc); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CallExprClass; |
| } |
| static bool classof(const CallExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static CallExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// MemberExpr - [C99 6.5.2.3] Structure and Union Members. |
| /// |
| class MemberExpr : public Expr { |
| Stmt *Base; |
| FieldDecl *MemberDecl; |
| SourceLocation MemberLoc; |
| bool IsArrow; // True if this is "X->F", false if this is "X.F". |
| public: |
| MemberExpr(Expr *base, bool isarrow, FieldDecl *memberdecl, SourceLocation l, |
| QualType ty) |
| : Expr(MemberExprClass, ty), |
| Base(base), MemberDecl(memberdecl), MemberLoc(l), IsArrow(isarrow) {} |
| |
| Expr *getBase() const { return cast<Expr>(Base); } |
| FieldDecl *getMemberDecl() const { return MemberDecl; } |
| bool isArrow() const { return IsArrow; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getBase()->getLocStart(), MemberLoc); |
| } |
| |
| virtual SourceLocation getExprLoc() const { return MemberLoc; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == MemberExprClass; |
| } |
| static bool classof(const MemberExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static MemberExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// CompoundLiteralExpr - [C99 6.5.2.5] |
| /// |
| class CompoundLiteralExpr : public Expr { |
| /// LParenLoc - If non-null, this is the location of the left paren in a |
| /// compound literal like "(int){4}". This can be null if this is a |
| /// synthesized compound expression. |
| SourceLocation LParenLoc; |
| Stmt *Init; |
| bool FileScope; |
| public: |
| CompoundLiteralExpr(SourceLocation lparenloc, QualType ty, Expr *init, |
| bool fileScope) |
| : Expr(CompoundLiteralExprClass, ty), LParenLoc(lparenloc), Init(init), |
| FileScope(fileScope) {} |
| |
| const Expr *getInitializer() const { return cast<Expr>(Init); } |
| Expr *getInitializer() { return cast<Expr>(Init); } |
| |
| bool isFileScope() const { return FileScope; } |
| |
| SourceLocation getLParenLoc() const { return LParenLoc; } |
| |
| virtual SourceRange getSourceRange() const { |
| // FIXME: Init should never be null. |
| if (!Init) |
| return SourceRange(); |
| if (LParenLoc.isInvalid()) |
| return Init->getSourceRange(); |
| return SourceRange(LParenLoc, Init->getLocEnd()); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == CompoundLiteralExprClass; |
| } |
| static bool classof(const CompoundLiteralExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static CompoundLiteralExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// CastExpr - Base class for Cast Operators (explicit, implicit, etc.). |
| /// Classes that derive from CastExpr are: |
| /// |
| /// ImplicitCastExpr |
| /// ExplicitCastExpr |
| /// |
| class CastExpr : public Expr { |
| Stmt *Op; |
| protected: |
| CastExpr(StmtClass SC, QualType ty, Expr *op) : |
| Expr(SC, ty), Op(op) {} |
| |
| public: |
| Expr *getSubExpr() { return cast<Expr>(Op); } |
| const Expr *getSubExpr() const { return cast<Expr>(Op); } |
| |
| static bool classof(const Stmt *T) { |
| switch (T->getStmtClass()) { |
| case ImplicitCastExprClass: |
| case ExplicitCastExprClass: |
| case CXXFunctionalCastExprClass: |
| return true; |
| default: |
| return false; |
| } |
| } |
| static bool classof(const CastExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| }; |
| |
| /// ImplicitCastExpr - Allows us to explicitly represent implicit type |
| /// conversions. For example: converting T[]->T*, void f()->void (*f)(), |
| /// float->double, short->int, etc. |
| /// |
| class ImplicitCastExpr : public CastExpr { |
| public: |
| ImplicitCastExpr(QualType ty, Expr *op) : |
| CastExpr(ImplicitCastExprClass, ty, op) {} |
| |
| virtual SourceRange getSourceRange() const { |
| return getSubExpr()->getSourceRange(); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ImplicitCastExprClass; |
| } |
| static bool classof(const ImplicitCastExpr *) { return true; } |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ImplicitCastExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// ExplicitCastExpr - [C99 6.5.4] Cast Operators. |
| /// |
| class ExplicitCastExpr : public CastExpr { |
| SourceLocation Loc; // the location of the left paren |
| public: |
| ExplicitCastExpr(QualType ty, Expr *op, SourceLocation l) : |
| CastExpr(ExplicitCastExprClass, ty, op), Loc(l) {} |
| |
| SourceLocation getLParenLoc() const { return Loc; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(Loc, getSubExpr()->getSourceRange().getEnd()); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ExplicitCastExprClass; |
| } |
| static bool classof(const ExplicitCastExpr *) { return true; } |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ExplicitCastExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| class BinaryOperator : public Expr { |
| public: |
| enum Opcode { |
| // Operators listed in order of precedence. |
| // Note that additions to this should also update the StmtVisitor class. |
| Mul, Div, Rem, // [C99 6.5.5] Multiplicative operators. |
| Add, Sub, // [C99 6.5.6] Additive operators. |
| Shl, Shr, // [C99 6.5.7] Bitwise shift operators. |
| LT, GT, LE, GE, // [C99 6.5.8] Relational operators. |
| EQ, NE, // [C99 6.5.9] Equality operators. |
| And, // [C99 6.5.10] Bitwise AND operator. |
| Xor, // [C99 6.5.11] Bitwise XOR operator. |
| Or, // [C99 6.5.12] Bitwise OR operator. |
| LAnd, // [C99 6.5.13] Logical AND operator. |
| LOr, // [C99 6.5.14] Logical OR operator. |
| Assign, MulAssign,// [C99 6.5.16] Assignment operators. |
| DivAssign, RemAssign, |
| AddAssign, SubAssign, |
| ShlAssign, ShrAssign, |
| AndAssign, XorAssign, |
| OrAssign, |
| Comma // [C99 6.5.17] Comma operator. |
| }; |
| private: |
| enum { LHS, RHS, END_EXPR }; |
| Stmt* SubExprs[END_EXPR]; |
| Opcode Opc; |
| SourceLocation OpLoc; |
| public: |
| |
| BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, |
| SourceLocation opLoc) |
| : Expr(BinaryOperatorClass, ResTy), Opc(opc), OpLoc(opLoc) { |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| assert(!isCompoundAssignmentOp() && |
| "Use ArithAssignBinaryOperator for compound assignments"); |
| } |
| |
| SourceLocation getOperatorLoc() const { return OpLoc; } |
| Opcode getOpcode() const { return Opc; } |
| Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
| Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd()); |
| } |
| |
| /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| /// corresponds to, e.g. "<<=". |
| static const char *getOpcodeStr(Opcode Op); |
| |
| /// predicates to categorize the respective opcodes. |
| bool isMultiplicativeOp() const { return Opc >= Mul && Opc <= Rem; } |
| bool isAdditiveOp() const { return Opc == Add || Opc == Sub; } |
| bool isShiftOp() const { return Opc == Shl || Opc == Shr; } |
| bool isBitwiseOp() const { return Opc >= And && Opc <= Or; } |
| |
| static bool isRelationalOp(Opcode Opc) { return Opc >= LT && Opc <= GE; } |
| bool isRelationalOp() const { return isRelationalOp(Opc); } |
| |
| static bool isEqualityOp(Opcode Opc) { return Opc == EQ || Opc == NE; } |
| bool isEqualityOp() const { return isEqualityOp(Opc); } |
| |
| static bool isLogicalOp(Opcode Opc) { return Opc == LAnd || Opc == LOr; } |
| bool isLogicalOp() const { return isLogicalOp(Opc); } |
| |
| bool isAssignmentOp() const { return Opc >= Assign && Opc <= OrAssign; } |
| bool isCompoundAssignmentOp() const { return Opc > Assign && Opc <= OrAssign;} |
| bool isShiftAssignOp() const { return Opc == ShlAssign || Opc == ShrAssign; } |
| |
| static bool classof(const Stmt *S) { |
| return S->getStmtClass() == BinaryOperatorClass || |
| S->getStmtClass() == CompoundAssignOperatorClass; |
| } |
| static bool classof(const BinaryOperator *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static BinaryOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| |
| protected: |
| BinaryOperator(Expr *lhs, Expr *rhs, Opcode opc, QualType ResTy, |
| SourceLocation oploc, bool dead) |
| : Expr(CompoundAssignOperatorClass, ResTy), Opc(opc), OpLoc(oploc) { |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| }; |
| |
| /// CompoundAssignOperator - For compound assignments (e.g. +=), we keep |
| /// track of the type the operation is performed in. Due to the semantics of |
| /// these operators, the operands are promoted, the aritmetic performed, an |
| /// implicit conversion back to the result type done, then the assignment takes |
| /// place. This captures the intermediate type which the computation is done |
| /// in. |
| class CompoundAssignOperator : public BinaryOperator { |
| QualType ComputationType; |
| public: |
| CompoundAssignOperator(Expr *lhs, Expr *rhs, Opcode opc, |
| QualType ResType, QualType CompType, |
| SourceLocation OpLoc) |
| : BinaryOperator(lhs, rhs, opc, ResType, OpLoc, true), |
| ComputationType(CompType) { |
| assert(isCompoundAssignmentOp() && |
| "Only should be used for compound assignments"); |
| } |
| |
| QualType getComputationType() const { return ComputationType; } |
| |
| static bool classof(const CompoundAssignOperator *) { return true; } |
| static bool classof(const Stmt *S) { |
| return S->getStmtClass() == CompoundAssignOperatorClass; |
| } |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static CompoundAssignOperator* CreateImpl(llvm::Deserializer& D, |
| ASTContext& C); |
| }; |
| |
| /// ConditionalOperator - The ?: operator. Note that LHS may be null when the |
| /// GNU "missing LHS" extension is in use. |
| /// |
| class ConditionalOperator : public Expr { |
| enum { COND, LHS, RHS, END_EXPR }; |
| Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. |
| public: |
| ConditionalOperator(Expr *cond, Expr *lhs, Expr *rhs, QualType t) |
| : Expr(ConditionalOperatorClass, t) { |
| SubExprs[COND] = cond; |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| // getCond - Return the expression representing the condition for |
| // the ?: operator. |
| Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
| |
| // getTrueExpr - Return the subexpression representing the value of the ?: |
| // expression if the condition evaluates to true. In most cases this value |
| // will be the same as getLHS() except a GCC extension allows the left |
| // subexpression to be omitted, and instead of the condition be returned. |
| // e.g: x ?: y is shorthand for x ? x : y, except that the expression "x" |
| // is only evaluated once. |
| Expr *getTrueExpr() const { |
| return cast<Expr>(SubExprs[LHS] ? SubExprs[LHS] : SubExprs[COND]); |
| } |
| |
| // getTrueExpr - Return the subexpression representing the value of the ?: |
| // expression if the condition evaluates to false. This is the same as getRHS. |
| Expr *getFalseExpr() const { return cast<Expr>(SubExprs[RHS]); } |
| |
| Expr *getLHS() const { return cast_or_null<Expr>(SubExprs[LHS]); } |
| Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd()); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ConditionalOperatorClass; |
| } |
| static bool classof(const ConditionalOperator *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ConditionalOperator* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// AddrLabelExpr - The GNU address of label extension, representing &&label. |
| class AddrLabelExpr : public Expr { |
| SourceLocation AmpAmpLoc, LabelLoc; |
| LabelStmt *Label; |
| public: |
| AddrLabelExpr(SourceLocation AALoc, SourceLocation LLoc, LabelStmt *L, |
| QualType t) |
| : Expr(AddrLabelExprClass, t), AmpAmpLoc(AALoc), LabelLoc(LLoc), Label(L) {} |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(AmpAmpLoc, LabelLoc); |
| } |
| |
| LabelStmt *getLabel() const { return Label; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == AddrLabelExprClass; |
| } |
| static bool classof(const AddrLabelExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static AddrLabelExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// StmtExpr - This is the GNU Statement Expression extension: ({int X=4; X;}). |
| /// The StmtExpr contains a single CompoundStmt node, which it evaluates and |
| /// takes the value of the last subexpression. |
| class StmtExpr : public Expr { |
| Stmt *SubStmt; |
| SourceLocation LParenLoc, RParenLoc; |
| public: |
| StmtExpr(CompoundStmt *substmt, QualType T, |
| SourceLocation lp, SourceLocation rp) : |
| Expr(StmtExprClass, T), SubStmt(substmt), LParenLoc(lp), RParenLoc(rp) { } |
| |
| CompoundStmt *getSubStmt() { return cast<CompoundStmt>(SubStmt); } |
| const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(LParenLoc, RParenLoc); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == StmtExprClass; |
| } |
| static bool classof(const StmtExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static StmtExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// TypesCompatibleExpr - GNU builtin-in function __builtin_type_compatible_p. |
| /// This AST node represents a function that returns 1 if two *types* (not |
| /// expressions) are compatible. The result of this built-in function can be |
| /// used in integer constant expressions. |
| class TypesCompatibleExpr : public Expr { |
| QualType Type1; |
| QualType Type2; |
| SourceLocation BuiltinLoc, RParenLoc; |
| public: |
| TypesCompatibleExpr(QualType ReturnType, SourceLocation BLoc, |
| QualType t1, QualType t2, SourceLocation RP) : |
| Expr(TypesCompatibleExprClass, ReturnType), Type1(t1), Type2(t2), |
| BuiltinLoc(BLoc), RParenLoc(RP) {} |
| |
| QualType getArgType1() const { return Type1; } |
| QualType getArgType2() const { return Type2; } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == TypesCompatibleExprClass; |
| } |
| static bool classof(const TypesCompatibleExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static TypesCompatibleExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// ShuffleVectorExpr - clang-specific builtin-in function |
| /// __builtin_shufflevector. |
| /// This AST node represents a operator that does a constant |
| /// shuffle, similar to LLVM's shufflevector instruction. It takes |
| /// two vectors and a variable number of constant indices, |
| /// and returns the appropriately shuffled vector. |
| class ShuffleVectorExpr : public Expr { |
| SourceLocation BuiltinLoc, RParenLoc; |
| |
| // SubExprs - the list of values passed to the __builtin_shufflevector |
| // function. The first two are vectors, and the rest are constant |
| // indices. The number of values in this list is always |
| // 2+the number of indices in the vector type. |
| Stmt **SubExprs; |
| unsigned NumExprs; |
| |
| public: |
| ShuffleVectorExpr(Expr **args, unsigned nexpr, |
| QualType Type, SourceLocation BLoc, |
| SourceLocation RP) : |
| Expr(ShuffleVectorExprClass, Type), BuiltinLoc(BLoc), |
| RParenLoc(RP), NumExprs(nexpr) { |
| |
| SubExprs = new Stmt*[nexpr]; |
| for (unsigned i = 0; i < nexpr; i++) |
| SubExprs[i] = args[i]; |
| } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ShuffleVectorExprClass; |
| } |
| static bool classof(const ShuffleVectorExpr *) { return true; } |
| |
| ~ShuffleVectorExpr() { |
| delete [] SubExprs; |
| } |
| |
| /// getNumSubExprs - Return the size of the SubExprs array. This includes the |
| /// constant expression, the actual arguments passed in, and the function |
| /// pointers. |
| unsigned getNumSubExprs() const { return NumExprs; } |
| |
| /// getExpr - Return the Expr at the specified index. |
| Expr *getExpr(unsigned Index) { |
| assert((Index < NumExprs) && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Index]); |
| } |
| const Expr *getExpr(unsigned Index) const { |
| assert((Index < NumExprs) && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Index]); |
| } |
| |
| unsigned getShuffleMaskIdx(ASTContext &Ctx, unsigned N) { |
| assert((N < NumExprs - 2) && "Shuffle idx out of range!"); |
| return getExpr(N+2)->getIntegerConstantExprValue(Ctx).getZExtValue(); |
| } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ShuffleVectorExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// ChooseExpr - GNU builtin-in function __builtin_choose_expr. |
| /// This AST node is similar to the conditional operator (?:) in C, with |
| /// the following exceptions: |
| /// - the test expression much be a constant expression. |
| /// - the expression returned has it's type unaltered by promotion rules. |
| /// - does not evaluate the expression that was not chosen. |
| class ChooseExpr : public Expr { |
| enum { COND, LHS, RHS, END_EXPR }; |
| Stmt* SubExprs[END_EXPR]; // Left/Middle/Right hand sides. |
| SourceLocation BuiltinLoc, RParenLoc; |
| public: |
| ChooseExpr(SourceLocation BLoc, Expr *cond, Expr *lhs, Expr *rhs, QualType t, |
| SourceLocation RP) |
| : Expr(ChooseExprClass, t), |
| BuiltinLoc(BLoc), RParenLoc(RP) { |
| SubExprs[COND] = cond; |
| SubExprs[LHS] = lhs; |
| SubExprs[RHS] = rhs; |
| } |
| |
| /// isConditionTrue - Return true if the condition is true. This is always |
| /// statically knowable for a well-formed choosexpr. |
| bool isConditionTrue(ASTContext &C) const; |
| |
| Expr *getCond() const { return cast<Expr>(SubExprs[COND]); } |
| Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); } |
| Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ChooseExprClass; |
| } |
| static bool classof(const ChooseExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ChooseExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// OverloadExpr - Clang builtin function __builtin_overload. |
| /// This AST node provides a way to overload functions in C. |
| /// |
| /// The first argument is required to be a constant expression, for the number |
| /// of arguments passed to each candidate function. |
| /// |
| /// The next N arguments, where N is the value of the constant expression, |
| /// are the values to be passed as arguments. |
| /// |
| /// The rest of the arguments are values of pointer to function type, which |
| /// are the candidate functions for overloading. |
| /// |
| /// The result is a equivalent to a CallExpr taking N arguments to the |
| /// candidate function whose parameter types match the types of the N arguments. |
| /// |
| /// example: float Z = __builtin_overload(2, X, Y, modf, mod, modl); |
| /// If X and Y are long doubles, Z will assigned the result of modl(X, Y); |
| /// If X and Y are floats, Z will be assigned the result of modf(X, Y); |
| class OverloadExpr : public Expr { |
| // SubExprs - the list of values passed to the __builtin_overload function. |
| // SubExpr[0] is a constant expression |
| // SubExpr[1-N] are the parameters to pass to the matching function call |
| // SubExpr[N-...] are the candidate functions, of type pointer to function. |
| Stmt **SubExprs; |
| |
| // NumExprs - the size of the SubExprs array |
| unsigned NumExprs; |
| |
| // The index of the matching candidate function |
| unsigned FnIndex; |
| |
| SourceLocation BuiltinLoc; |
| SourceLocation RParenLoc; |
| public: |
| OverloadExpr(Expr **args, unsigned nexprs, unsigned idx, QualType t, |
| SourceLocation bloc, SourceLocation rploc) |
| : Expr(OverloadExprClass, t), NumExprs(nexprs), FnIndex(idx), |
| BuiltinLoc(bloc), RParenLoc(rploc) { |
| SubExprs = new Stmt*[nexprs]; |
| for (unsigned i = 0; i != nexprs; ++i) |
| SubExprs[i] = args[i]; |
| } |
| ~OverloadExpr() { |
| delete [] SubExprs; |
| } |
| |
| /// arg_begin - Return a pointer to the list of arguments that will be passed |
| /// to the matching candidate function, skipping over the initial constant |
| /// expression. |
| typedef ConstExprIterator const_arg_iterator; |
| const_arg_iterator arg_begin() const { return &SubExprs[0]+1; } |
| const_arg_iterator arg_end(ASTContext& Ctx) const { |
| return &SubExprs[0]+1+getNumArgs(Ctx); |
| } |
| |
| /// getNumArgs - Return the number of arguments to pass to the candidate |
| /// functions. |
| unsigned getNumArgs(ASTContext &Ctx) const { |
| return getExpr(0)->getIntegerConstantExprValue(Ctx).getZExtValue(); |
| } |
| |
| /// getNumSubExprs - Return the size of the SubExprs array. This includes the |
| /// constant expression, the actual arguments passed in, and the function |
| /// pointers. |
| unsigned getNumSubExprs() const { return NumExprs; } |
| |
| /// getExpr - Return the Expr at the specified index. |
| Expr *getExpr(unsigned Index) const { |
| assert((Index < NumExprs) && "Arg access out of range!"); |
| return cast<Expr>(SubExprs[Index]); |
| } |
| |
| /// getFn - Return the matching candidate function for this OverloadExpr. |
| Expr *getFn() const { return cast<Expr>(SubExprs[FnIndex]); } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == OverloadExprClass; |
| } |
| static bool classof(const OverloadExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static OverloadExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// VAArgExpr, used for the builtin function __builtin_va_start. |
| class VAArgExpr : public Expr { |
| Stmt *Val; |
| SourceLocation BuiltinLoc, RParenLoc; |
| public: |
| VAArgExpr(SourceLocation BLoc, Expr* e, QualType t, SourceLocation RPLoc) |
| : Expr(VAArgExprClass, t), |
| Val(e), |
| BuiltinLoc(BLoc), |
| RParenLoc(RPLoc) { } |
| |
| const Expr *getSubExpr() const { return cast<Expr>(Val); } |
| Expr *getSubExpr() { return cast<Expr>(Val); } |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(BuiltinLoc, RParenLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == VAArgExprClass; |
| } |
| static bool classof(const VAArgExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static VAArgExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// InitListExpr - used for struct and array initializers, such as: |
| /// struct foo x = { 1, { 2, 3 } }; |
| /// |
| /// Because C is somewhat loose with braces, the AST does not necessarily |
| /// directly model the C source. Instead, the semantic analyzer aims to make |
| /// the InitListExprs match up with the type of the decl being initialized. We |
| /// have the following exceptions: |
| /// |
| /// 1. Elements at the end of the list may be dropped from the initializer. |
| /// These elements are defined to be initialized to zero. For example: |
| /// int x[20] = { 1 }; |
| /// 2. Initializers may have excess initializers which are to be ignored by the |
| /// compiler. For example: |
| /// int x[1] = { 1, 2 }; |
| /// 3. Redundant InitListExprs may be present around scalar elements. These |
| /// always have a single element whose type is the same as the InitListExpr. |
| /// this can only happen for Type::isScalarType() types. |
| /// int x = { 1 }; int y[2] = { {1}, {2} }; |
| /// |
| class InitListExpr : public Expr { |
| std::vector<Stmt *> InitExprs; |
| SourceLocation LBraceLoc, RBraceLoc; |
| public: |
| InitListExpr(SourceLocation lbraceloc, Expr **initexprs, unsigned numinits, |
| SourceLocation rbraceloc); |
| |
| unsigned getNumInits() const { return InitExprs.size(); } |
| |
| const Expr* getInit(unsigned Init) const { |
| assert(Init < getNumInits() && "Initializer access out of range!"); |
| return cast<Expr>(InitExprs[Init]); |
| } |
| |
| Expr* getInit(unsigned Init) { |
| assert(Init < getNumInits() && "Initializer access out of range!"); |
| return cast<Expr>(InitExprs[Init]); |
| } |
| |
| void setInit(unsigned Init, Expr *expr) { |
| assert(Init < getNumInits() && "Initializer access out of range!"); |
| InitExprs[Init] = expr; |
| } |
| |
| // Dynamic removal/addition (for constructing implicit InitExpr's). |
| void removeInit(unsigned Init) { |
| InitExprs.erase(InitExprs.begin()+Init); |
| } |
| void addInit(unsigned Init, Expr *expr) { |
| InitExprs.insert(InitExprs.begin()+Init, expr); |
| } |
| |
| // Explicit InitListExpr's originate from source code (and have valid source |
| // locations). Implicit InitListExpr's are created by the semantic analyzer. |
| bool isExplicit() { |
| return LBraceLoc.isValid() && RBraceLoc.isValid(); |
| } |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(LBraceLoc, RBraceLoc); |
| } |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == InitListExprClass; |
| } |
| static bool classof(const InitListExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static InitListExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| |
| private: |
| // Used by serializer. |
| InitListExpr() : Expr(InitListExprClass, QualType()) {} |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // Clang Extensions |
| //===----------------------------------------------------------------------===// |
| |
| |
| /// ExtVectorElementExpr - This represents access to specific elements of a |
| /// vector, and may occur on the left hand side or right hand side. For example |
| /// the following is legal: "V.xy = V.zw" if V is a 4 element extended vector. |
| /// |
| class ExtVectorElementExpr : public Expr { |
| Stmt *Base; |
| IdentifierInfo &Accessor; |
| SourceLocation AccessorLoc; |
| public: |
| ExtVectorElementExpr(QualType ty, Expr *base, IdentifierInfo &accessor, |
| SourceLocation loc) |
| : Expr(ExtVectorElementExprClass, ty), |
| Base(base), Accessor(accessor), AccessorLoc(loc) {} |
| |
| const Expr *getBase() const { return cast<Expr>(Base); } |
| Expr *getBase() { return cast<Expr>(Base); } |
| |
| IdentifierInfo &getAccessor() const { return Accessor; } |
| |
| /// getNumElements - Get the number of components being selected. |
| unsigned getNumElements() const; |
| |
| /// containsDuplicateElements - Return true if any element access is |
| /// repeated. |
| bool containsDuplicateElements() const; |
| |
| /// getEncodedElementAccess - Encode the elements accessed into an llvm |
| /// aggregate Constant of ConstantInt(s). |
| void getEncodedElementAccess(llvm::SmallVectorImpl<unsigned> &Elts) const; |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getBase()->getLocStart(), AccessorLoc); |
| } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == ExtVectorElementExprClass; |
| } |
| static bool classof(const ExtVectorElementExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static ExtVectorElementExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| |
| /// BlockExpr - Adaptor class for mixing a BlockDecl with expressions. |
| /// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } |
| class BlockExpr : public Expr { |
| protected: |
| BlockDecl *TheBlock; |
| public: |
| BlockExpr(BlockDecl *BD, QualType ty) : Expr(BlockExprClass, ty), |
| TheBlock(BD) {} |
| |
| BlockDecl *getBlockDecl() { return TheBlock; } |
| |
| // Convenience functions for probing the underlying BlockDecl. |
| SourceLocation getCaretLocation() const; |
| const Stmt *getBody() const; |
| Stmt *getBody(); |
| |
| virtual SourceRange getSourceRange() const { |
| return SourceRange(getCaretLocation(), getBody()->getLocEnd()); |
| } |
| |
| /// getFunctionType - Return the underlying function type for this block. |
| const FunctionType *getFunctionType() const; |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == BlockExprClass; |
| } |
| static bool classof(const BlockExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static BlockExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| /// BlockDeclRefExpr - A reference to a declared variable, function, |
| /// enum, etc. |
| class BlockDeclRefExpr : public Expr { |
| ValueDecl *D; |
| SourceLocation Loc; |
| bool IsByRef; |
| public: |
| BlockDeclRefExpr(ValueDecl *d, QualType t, SourceLocation l, bool ByRef) : |
| Expr(BlockDeclRefExprClass, t), D(d), Loc(l), IsByRef(ByRef) {} |
| |
| ValueDecl *getDecl() { return D; } |
| const ValueDecl *getDecl() const { return D; } |
| virtual SourceRange getSourceRange() const { return SourceRange(Loc); } |
| |
| bool isByRef() const { return IsByRef; } |
| |
| static bool classof(const Stmt *T) { |
| return T->getStmtClass() == BlockDeclRefExprClass; |
| } |
| static bool classof(const BlockDeclRefExpr *) { return true; } |
| |
| // Iterators |
| virtual child_iterator child_begin(); |
| virtual child_iterator child_end(); |
| |
| virtual void EmitImpl(llvm::Serializer& S) const; |
| static BlockDeclRefExpr* CreateImpl(llvm::Deserializer& D, ASTContext& C); |
| }; |
| |
| } // end namespace clang |
| |
| #endif |