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+//===--- Stmt.h - Classes for representing statements -----------*- 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 Stmt interface and subclasses.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_AST_STMT_H
+#define LLVM_CLANG_AST_STMT_H
+
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/raw_ostream.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/AST/PrettyPrinter.h"
+#include "clang/AST/StmtIterator.h"
+#include "clang/AST/DeclGroup.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/iterator.h"
+#include "clang/AST/ASTContext.h"
+#include <string>
+using llvm::dyn_cast_or_null;
+
+namespace clang {
+ class ASTContext;
+ class Expr;
+ class Decl;
+ class ParmVarDecl;
+ class QualType;
+ class IdentifierInfo;
+ class SourceManager;
+ class StringLiteral;
+ class SwitchStmt;
+
+ //===----------------------------------------------------------------------===//
+ // 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 Stmt;
+ class Expr;
+
+ 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);
+ // FIXME: Verify that this will correctly return a signed distance.
+ signed operator-(const ExprIterator& R) const { return I - R.I; }
+ Expr* operator*() const;
+ Expr* operator->() const;
+ 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; }
+ const Expr * operator[](size_t idx) const;
+ signed operator-(const ConstExprIterator& R) const { return I - R.I; }
+ const Expr * operator*() const;
+ const Expr * operator->() const;
+ 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; }
+ };
+
+//===----------------------------------------------------------------------===//
+// AST classes for statements.
+//===----------------------------------------------------------------------===//
+
+/// Stmt - This represents one statement.
+///
+class Stmt {
+public:
+ enum StmtClass {
+ NoStmtClass = 0,
+#define STMT(CLASS, PARENT) CLASS##Class,
+#define FIRST_STMT(CLASS) firstStmtConstant = CLASS##Class,
+#define LAST_STMT(CLASS) lastStmtConstant = CLASS##Class,
+#define FIRST_EXPR(CLASS) firstExprConstant = CLASS##Class,
+#define LAST_EXPR(CLASS) lastExprConstant = CLASS##Class
+#include "clang/AST/StmtNodes.def"
+};
+private:
+ const StmtClass sClass;
+
+ // Make vanilla 'new' and 'delete' illegal for Stmts.
+protected:
+ void* operator new(size_t bytes) throw() {
+ assert(0 && "Stmts cannot be allocated with regular 'new'.");
+ return 0;
+ }
+ void operator delete(void* data) throw() {
+ assert(0 && "Stmts cannot be released with regular 'delete'.");
+ }
+
+public:
+ // Only allow allocation of Stmts using the allocator in ASTContext
+ // or by doing a placement new.
+ void* operator new(size_t bytes, ASTContext& C,
+ unsigned alignment = 16) throw() {
+ return ::operator new(bytes, C, alignment);
+ }
+
+ void* operator new(size_t bytes, ASTContext* C,
+ unsigned alignment = 16) throw() {
+ return ::operator new(bytes, *C, alignment);
+ }
+
+ void* operator new(size_t bytes, void* mem) throw() {
+ return mem;
+ }
+
+ void operator delete(void*, ASTContext&, unsigned) throw() { }
+ void operator delete(void*, ASTContext*, unsigned) throw() { }
+ void operator delete(void*, std::size_t) throw() { }
+ void operator delete(void*, void*) throw() { }
+
+public:
+ /// \brief A placeholder type used to construct an empty shell of a
+ /// type, that will be filled in later (e.g., by some
+ /// de-serialization).
+ struct EmptyShell { };
+
+protected:
+ /// DestroyChildren - Invoked by destructors of subclasses of Stmt to
+ /// recursively release child AST nodes.
+ void DestroyChildren(ASTContext& Ctx);
+
+ /// \brief Construct an empty statement.
+ explicit Stmt(StmtClass SC, EmptyShell) : sClass(SC) {
+ if (Stmt::CollectingStats()) Stmt::addStmtClass(SC);
+ }
+
+public:
+ Stmt(StmtClass SC) : sClass(SC) {
+ if (Stmt::CollectingStats()) Stmt::addStmtClass(SC);
+ }
+ virtual ~Stmt() {}
+
+ virtual void Destroy(ASTContext &Ctx);
+
+ StmtClass getStmtClass() const { return sClass; }
+ const char *getStmtClassName() const;
+
+ /// 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;
+ SourceLocation getLocStart() const { return getSourceRange().getBegin(); }
+ SourceLocation getLocEnd() const { return getSourceRange().getEnd(); }
+
+ // global temp stats (until we have a per-module visitor)
+ static void addStmtClass(const StmtClass s);
+ static bool CollectingStats(bool enable=false);
+ static void PrintStats();
+
+ /// dump - This does a local dump of the specified AST fragment. It dumps the
+ /// specified node and a few nodes underneath it, but not the whole subtree.
+ /// This is useful in a debugger.
+ void dump() const;
+ void dump(SourceManager &SM) const;
+
+ /// dumpAll - This does a dump of the specified AST fragment and all subtrees.
+ void dumpAll() const;
+ void dumpAll(SourceManager &SM) const;
+
+ /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST
+ /// back to its original source language syntax.
+ void dumpPretty(ASTContext& Context) const;
+ void printPretty(llvm::raw_ostream &OS, PrinterHelper *Helper = 0,
+ const PrintingPolicy &Policy = PrintingPolicy(),
+ unsigned Indentation = 0) const {
+ printPretty(OS, *(ASTContext*)0, Helper, Policy, Indentation);
+ }
+ void printPretty(llvm::raw_ostream &OS, ASTContext& Context,
+ PrinterHelper *Helper = 0,
+ const PrintingPolicy &Policy = PrintingPolicy(),
+ unsigned Indentation = 0) const;
+
+ /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only
+ /// works on systems with GraphViz (Mac OS X) or dot+gv installed.
+ void viewAST() const;
+
+ // Implement isa<T> support.
+ static bool classof(const Stmt *) { return true; }
+
+ /// hasImplicitControlFlow - Some statements (e.g. short circuited operations)
+ /// contain implicit control-flow in the order their subexpressions
+ /// are evaluated. This predicate returns true if this statement has
+ /// such implicit control-flow. Such statements are also specially handled
+ /// within CFGs.
+ bool hasImplicitControlFlow() const;
+
+ /// Child Iterators: All subclasses must implement child_begin and child_end
+ /// to permit easy iteration over the substatements/subexpessions of an
+ /// AST node. This permits easy iteration over all nodes in the AST.
+ typedef StmtIterator child_iterator;
+ typedef ConstStmtIterator const_child_iterator;
+
+ virtual child_iterator child_begin() = 0;
+ virtual child_iterator child_end() = 0;
+
+ const_child_iterator child_begin() const {
+ return const_child_iterator(const_cast<Stmt*>(this)->child_begin());
+ }
+
+ const_child_iterator child_end() const {
+ return const_child_iterator(const_cast<Stmt*>(this)->child_end());
+ }
+};
+
+/// DeclStmt - Adaptor class for mixing declarations with statements and
+/// expressions. For example, CompoundStmt mixes statements, expressions
+/// and declarations (variables, types). Another example is ForStmt, where
+/// the first statement can be an expression or a declaration.
+///
+class DeclStmt : public Stmt {
+ DeclGroupRef DG;
+ SourceLocation StartLoc, EndLoc;
+public:
+ DeclStmt(DeclGroupRef dg, SourceLocation startLoc,
+ SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg),
+ StartLoc(startLoc), EndLoc(endLoc) {}
+
+ /// \brief Build an empty declaration statement.
+ explicit DeclStmt(EmptyShell Empty) : Stmt(DeclStmtClass, Empty) { }
+
+ virtual void Destroy(ASTContext& Ctx);
+
+ /// isSingleDecl - This method returns true if this DeclStmt refers
+ /// to a single Decl.
+ bool isSingleDecl() const {
+ return DG.isSingleDecl();
+ }
+
+ const Decl *getSingleDecl() const { return DG.getSingleDecl(); }
+ Decl *getSingleDecl() { return DG.getSingleDecl(); }
+
+ const DeclGroupRef getDeclGroup() const { return DG; }
+ DeclGroupRef getDeclGroup() { return DG; }
+ void setDeclGroup(DeclGroupRef DGR) { DG = DGR; }
+
+ SourceLocation getStartLoc() const { return StartLoc; }
+ void setStartLoc(SourceLocation L) { StartLoc = L; }
+ SourceLocation getEndLoc() const { return EndLoc; }
+ void setEndLoc(SourceLocation L) { EndLoc = L; }
+
+ SourceRange getSourceRange() const {
+ return SourceRange(StartLoc, EndLoc);
+ }
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == DeclStmtClass;
+ }
+ static bool classof(const DeclStmt *) { return true; }
+
+ // Iterators over subexpressions.
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+
+ typedef DeclGroupRef::iterator decl_iterator;
+ typedef DeclGroupRef::const_iterator const_decl_iterator;
+
+ decl_iterator decl_begin() { return DG.begin(); }
+ decl_iterator decl_end() { return DG.end(); }
+ const_decl_iterator decl_begin() const { return DG.begin(); }
+ const_decl_iterator decl_end() const { return DG.end(); }
+};
+
+/// NullStmt - This is the null statement ";": C99 6.8.3p3.
+///
+class NullStmt : public Stmt {
+ SourceLocation SemiLoc;
+public:
+ NullStmt(SourceLocation L) : Stmt(NullStmtClass), SemiLoc(L) {}
+
+ /// \brief Build an empty null statement.
+ explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty) { }
+
+ NullStmt* Clone(ASTContext &C) const;
+
+ SourceLocation getSemiLoc() const { return SemiLoc; }
+ void setSemiLoc(SourceLocation L) { SemiLoc = L; }
+
+ virtual SourceRange getSourceRange() const { return SourceRange(SemiLoc); }
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == NullStmtClass;
+ }
+ static bool classof(const NullStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// CompoundStmt - This represents a group of statements like { stmt stmt }.
+///
+class CompoundStmt : public Stmt {
+ Stmt** Body;
+ unsigned NumStmts;
+ SourceLocation LBracLoc, RBracLoc;
+public:
+ CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned numStmts,
+ SourceLocation LB, SourceLocation RB)
+ : Stmt(CompoundStmtClass), NumStmts(numStmts), LBracLoc(LB), RBracLoc(RB) {
+ if (NumStmts == 0) {
+ Body = 0;
+ return;
+ }
+
+ Body = new (C) Stmt*[NumStmts];
+ memcpy(Body, StmtStart, numStmts * sizeof(*Body));
+ }
+
+ // \brief Build an empty compound statement.
+ explicit CompoundStmt(EmptyShell Empty)
+ : Stmt(CompoundStmtClass, Empty), Body(0), NumStmts(0) { }
+
+ void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts);
+
+ bool body_empty() const { return NumStmts == 0; }
+ unsigned size() const { return NumStmts; }
+
+ typedef Stmt** body_iterator;
+ body_iterator body_begin() { return Body; }
+ body_iterator body_end() { return Body + NumStmts; }
+ Stmt *body_back() { return NumStmts ? Body[NumStmts-1] : 0; }
+
+ typedef Stmt* const * const_body_iterator;
+ const_body_iterator body_begin() const { return Body; }
+ const_body_iterator body_end() const { return Body + NumStmts; }
+ const Stmt *body_back() const { return NumStmts ? Body[NumStmts-1] : 0; }
+
+ typedef std::reverse_iterator<body_iterator> reverse_body_iterator;
+ reverse_body_iterator body_rbegin() {
+ return reverse_body_iterator(body_end());
+ }
+ reverse_body_iterator body_rend() {
+ return reverse_body_iterator(body_begin());
+ }
+
+ typedef std::reverse_iterator<const_body_iterator>
+ const_reverse_body_iterator;
+
+ const_reverse_body_iterator body_rbegin() const {
+ return const_reverse_body_iterator(body_end());
+ }
+
+ const_reverse_body_iterator body_rend() const {
+ return const_reverse_body_iterator(body_begin());
+ }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(LBracLoc, RBracLoc);
+ }
+
+ SourceLocation getLBracLoc() const { return LBracLoc; }
+ void setLBracLoc(SourceLocation L) { LBracLoc = L; }
+ SourceLocation getRBracLoc() const { return RBracLoc; }
+ void setRBracLoc(SourceLocation L) { RBracLoc = L; }
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == CompoundStmtClass;
+ }
+ static bool classof(const CompoundStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+// SwitchCase is the base class for CaseStmt and DefaultStmt,
+class SwitchCase : public Stmt {
+protected:
+ // A pointer to the following CaseStmt or DefaultStmt class,
+ // used by SwitchStmt.
+ SwitchCase *NextSwitchCase;
+
+ SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {}
+
+public:
+ const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; }
+
+ SwitchCase *getNextSwitchCase() { return NextSwitchCase; }
+
+ void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; }
+
+ Stmt *getSubStmt() { return v_getSubStmt(); }
+
+ virtual SourceRange getSourceRange() const { return SourceRange(); }
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == CaseStmtClass ||
+ T->getStmtClass() == DefaultStmtClass;
+ }
+ static bool classof(const SwitchCase *) { return true; }
+protected:
+ virtual Stmt* v_getSubStmt() = 0;
+};
+
+class CaseStmt : public SwitchCase {
+ enum { SUBSTMT, LHS, RHS, END_EXPR };
+ Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for
+ // GNU "case 1 ... 4" extension
+ SourceLocation CaseLoc;
+ SourceLocation EllipsisLoc;
+ SourceLocation ColonLoc;
+
+ virtual Stmt* v_getSubStmt() { return getSubStmt(); }
+public:
+ CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc,
+ SourceLocation ellipsisLoc, SourceLocation colonLoc)
+ : SwitchCase(CaseStmtClass) {
+ SubExprs[SUBSTMT] = 0;
+ SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs);
+ SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs);
+ CaseLoc = caseLoc;
+ EllipsisLoc = ellipsisLoc;
+ ColonLoc = colonLoc;
+ }
+
+ /// \brief Build an empty switch case statement.
+ explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { }
+
+ SourceLocation getCaseLoc() const { return CaseLoc; }
+ void setCaseLoc(SourceLocation L) { CaseLoc = L; }
+ SourceLocation getEllipsisLoc() const { return EllipsisLoc; }
+ void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; }
+ SourceLocation getColonLoc() const { return ColonLoc; }
+ void setColonLoc(SourceLocation L) { ColonLoc = L; }
+
+ Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); }
+ Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); }
+ Stmt *getSubStmt() { return SubExprs[SUBSTMT]; }
+
+ const Expr *getLHS() const {
+ return reinterpret_cast<const Expr*>(SubExprs[LHS]);
+ }
+ const Expr *getRHS() const {
+ return reinterpret_cast<const Expr*>(SubExprs[RHS]);
+ }
+ const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; }
+
+ void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; }
+ void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); }
+ void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); }
+
+
+ virtual SourceRange getSourceRange() const {
+ // Handle deeply nested case statements with iteration instead of recursion.
+ const CaseStmt *CS = this;
+ while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt()))
+ CS = CS2;
+
+ return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == CaseStmtClass;
+ }
+ static bool classof(const CaseStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+class DefaultStmt : public SwitchCase {
+ Stmt* SubStmt;
+ SourceLocation DefaultLoc;
+ SourceLocation ColonLoc;
+ virtual Stmt* v_getSubStmt() { return getSubStmt(); }
+public:
+ DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) :
+ SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL),
+ ColonLoc(CL) {}
+
+ /// \brief Build an empty default statement.
+ explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { }
+
+ Stmt *getSubStmt() { return SubStmt; }
+ const Stmt *getSubStmt() const { return SubStmt; }
+ void setSubStmt(Stmt *S) { SubStmt = S; }
+
+ SourceLocation getDefaultLoc() const { return DefaultLoc; }
+ void setDefaultLoc(SourceLocation L) { DefaultLoc = L; }
+ SourceLocation getColonLoc() const { return ColonLoc; }
+ void setColonLoc(SourceLocation L) { ColonLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(DefaultLoc, SubStmt->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == DefaultStmtClass;
+ }
+ static bool classof(const DefaultStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+class LabelStmt : public Stmt {
+ IdentifierInfo *Label;
+ Stmt *SubStmt;
+ SourceLocation IdentLoc;
+public:
+ LabelStmt(SourceLocation IL, IdentifierInfo *label, Stmt *substmt)
+ : Stmt(LabelStmtClass), Label(label),
+ SubStmt(substmt), IdentLoc(IL) {}
+
+ // \brief Build an empty label statement.
+ explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { }
+
+ SourceLocation getIdentLoc() const { return IdentLoc; }
+ IdentifierInfo *getID() const { return Label; }
+ void setID(IdentifierInfo *II) { Label = II; }
+ const char *getName() const;
+ Stmt *getSubStmt() { return SubStmt; }
+ const Stmt *getSubStmt() const { return SubStmt; }
+ void setIdentLoc(SourceLocation L) { IdentLoc = L; }
+ void setSubStmt(Stmt *SS) { SubStmt = SS; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(IdentLoc, SubStmt->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == LabelStmtClass;
+ }
+ static bool classof(const LabelStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+
+/// IfStmt - This represents an if/then/else.
+///
+class IfStmt : public Stmt {
+ enum { COND, THEN, ELSE, END_EXPR };
+ Stmt* SubExprs[END_EXPR];
+ SourceLocation IfLoc;
+ SourceLocation ElseLoc;
+public:
+ IfStmt(SourceLocation IL, Expr *cond, Stmt *then,
+ SourceLocation EL = SourceLocation(), Stmt *elsev = 0)
+ : Stmt(IfStmtClass) {
+ SubExprs[COND] = reinterpret_cast<Stmt*>(cond);
+ SubExprs[THEN] = then;
+ SubExprs[ELSE] = elsev;
+ IfLoc = IL;
+ ElseLoc = EL;
+ }
+
+ /// \brief Build an empty if/then/else statement
+ explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { }
+
+ const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);}
+ void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); }
+ const Stmt *getThen() const { return SubExprs[THEN]; }
+ void setThen(Stmt *S) { SubExprs[THEN] = S; }
+ const Stmt *getElse() const { return SubExprs[ELSE]; }
+ void setElse(Stmt *S) { SubExprs[ELSE] = S; }
+
+ Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); }
+ Stmt *getThen() { return SubExprs[THEN]; }
+ Stmt *getElse() { return SubExprs[ELSE]; }
+
+ SourceLocation getIfLoc() const { return IfLoc; }
+ void setIfLoc(SourceLocation L) { IfLoc = L; }
+ SourceLocation getElseLoc() const { return ElseLoc; }
+ void setElseLoc(SourceLocation L) { ElseLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ if (SubExprs[ELSE])
+ return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd());
+ else
+ return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd());
+ }
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == IfStmtClass;
+ }
+ static bool classof(const IfStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// SwitchStmt - This represents a 'switch' stmt.
+///
+class SwitchStmt : public Stmt {
+ enum { COND, BODY, END_EXPR };
+ Stmt* SubExprs[END_EXPR];
+ // This points to a linked list of case and default statements.
+ SwitchCase *FirstCase;
+ SourceLocation SwitchLoc;
+public:
+ SwitchStmt(Expr *cond) : Stmt(SwitchStmtClass), FirstCase(0) {
+ SubExprs[COND] = reinterpret_cast<Stmt*>(cond);
+ SubExprs[BODY] = NULL;
+ }
+
+ /// \brief Build a empty switch statement.
+ explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { }
+
+ const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);}
+ const Stmt *getBody() const { return SubExprs[BODY]; }
+ const SwitchCase *getSwitchCaseList() const { return FirstCase; }
+
+ Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);}
+ void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); }
+ Stmt *getBody() { return SubExprs[BODY]; }
+ void setBody(Stmt *S) { SubExprs[BODY] = S; }
+ SwitchCase *getSwitchCaseList() { return FirstCase; }
+ void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; }
+
+ SourceLocation getSwitchLoc() const { return SwitchLoc; }
+ void setSwitchLoc(SourceLocation L) { SwitchLoc = L; }
+
+ void setBody(Stmt *S, SourceLocation SL) {
+ SubExprs[BODY] = S;
+ SwitchLoc = SL;
+ }
+ void addSwitchCase(SwitchCase *SC) {
+ assert(!SC->getNextSwitchCase() && "case/default already added to a switch");
+ SC->setNextSwitchCase(FirstCase);
+ FirstCase = SC;
+ }
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == SwitchStmtClass;
+ }
+ static bool classof(const SwitchStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+
+/// WhileStmt - This represents a 'while' stmt.
+///
+class WhileStmt : public Stmt {
+ enum { COND, BODY, END_EXPR };
+ Stmt* SubExprs[END_EXPR];
+ SourceLocation WhileLoc;
+public:
+ WhileStmt(Expr *cond, Stmt *body, SourceLocation WL) : Stmt(WhileStmtClass) {
+ SubExprs[COND] = reinterpret_cast<Stmt*>(cond);
+ SubExprs[BODY] = body;
+ WhileLoc = WL;
+ }
+
+ /// \brief Build an empty while statement.
+ explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { }
+
+ Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); }
+ const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);}
+ void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); }
+ Stmt *getBody() { return SubExprs[BODY]; }
+ const Stmt *getBody() const { return SubExprs[BODY]; }
+ void setBody(Stmt *S) { SubExprs[BODY] = S; }
+
+ SourceLocation getWhileLoc() const { return WhileLoc; }
+ void setWhileLoc(SourceLocation L) { WhileLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == WhileStmtClass;
+ }
+ static bool classof(const WhileStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// DoStmt - This represents a 'do/while' stmt.
+///
+class DoStmt : public Stmt {
+ enum { COND, BODY, END_EXPR };
+ Stmt* SubExprs[END_EXPR];
+ SourceLocation DoLoc;
+ SourceLocation WhileLoc;
+
+public:
+ DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL)
+ : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL) {
+ SubExprs[COND] = reinterpret_cast<Stmt*>(cond);
+ SubExprs[BODY] = body;
+ DoLoc = DL;
+ WhileLoc = WL;
+ }
+
+ /// \brief Build an empty do-while statement.
+ explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { }
+
+ Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); }
+ const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);}
+ void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); }
+ Stmt *getBody() { return SubExprs[BODY]; }
+ const Stmt *getBody() const { return SubExprs[BODY]; }
+ void setBody(Stmt *S) { SubExprs[BODY] = S; }
+
+ SourceLocation getDoLoc() const { return DoLoc; }
+ void setDoLoc(SourceLocation L) { DoLoc = L; }
+ SourceLocation getWhileLoc() const { return WhileLoc; }
+ void setWhileLoc(SourceLocation L) { WhileLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(DoLoc, SubExprs[BODY]->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == DoStmtClass;
+ }
+ static bool classof(const DoStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+
+/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of
+/// the init/cond/inc parts of the ForStmt will be null if they were not
+/// specified in the source.
+///
+class ForStmt : public Stmt {
+ enum { INIT, COND, INC, BODY, END_EXPR };
+ Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt.
+ SourceLocation ForLoc;
+ SourceLocation LParenLoc, RParenLoc;
+
+public:
+ ForStmt(Stmt *Init, Expr *Cond, Expr *Inc, Stmt *Body, SourceLocation FL,
+ SourceLocation LP, SourceLocation RP)
+ : Stmt(ForStmtClass) {
+ SubExprs[INIT] = Init;
+ SubExprs[COND] = reinterpret_cast<Stmt*>(Cond);
+ SubExprs[INC] = reinterpret_cast<Stmt*>(Inc);
+ SubExprs[BODY] = Body;
+ ForLoc = FL;
+ LParenLoc = LP;
+ RParenLoc = RP;
+ }
+
+ /// \brief Build an empty for statement.
+ explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { }
+
+ Stmt *getInit() { return SubExprs[INIT]; }
+ Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); }
+ Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); }
+ Stmt *getBody() { return SubExprs[BODY]; }
+
+ const Stmt *getInit() const { return SubExprs[INIT]; }
+ const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);}
+ const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); }
+ const Stmt *getBody() const { return SubExprs[BODY]; }
+
+ void setInit(Stmt *S) { SubExprs[INIT] = S; }
+ void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); }
+ void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); }
+ void setBody(Stmt *S) { SubExprs[BODY] = S; }
+
+ SourceLocation getForLoc() const { return ForLoc; }
+ void setForLoc(SourceLocation L) { ForLoc = L; }
+ SourceLocation getLParenLoc() const { return LParenLoc; }
+ void setLParenLoc(SourceLocation L) { LParenLoc = L; }
+ SourceLocation getRParenLoc() const { return RParenLoc; }
+ void setRParenLoc(SourceLocation L) { RParenLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd());
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == ForStmtClass;
+ }
+ static bool classof(const ForStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// GotoStmt - This represents a direct goto.
+///
+class GotoStmt : public Stmt {
+ LabelStmt *Label;
+ SourceLocation GotoLoc;
+ SourceLocation LabelLoc;
+public:
+ GotoStmt(LabelStmt *label, SourceLocation GL, SourceLocation LL)
+ : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {}
+
+ /// \brief Build an empty goto statement.
+ explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { }
+
+ LabelStmt *getLabel() const { return Label; }
+ void setLabel(LabelStmt *S) { Label = S; }
+
+ SourceLocation getGotoLoc() const { return GotoLoc; }
+ void setGotoLoc(SourceLocation L) { GotoLoc = L; }
+ SourceLocation getLabelLoc() const { return LabelLoc; }
+ void setLabelLoc(SourceLocation L) { LabelLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(GotoLoc, LabelLoc);
+ }
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == GotoStmtClass;
+ }
+ static bool classof(const GotoStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// IndirectGotoStmt - This represents an indirect goto.
+///
+class IndirectGotoStmt : public Stmt {
+ SourceLocation GotoLoc;
+ SourceLocation StarLoc;
+ Stmt *Target;
+public:
+ IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc,
+ Expr *target)
+ : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc),
+ Target((Stmt*)target) {}
+
+ /// \brief Build an empty indirect goto statement.
+ explicit IndirectGotoStmt(EmptyShell Empty)
+ : Stmt(IndirectGotoStmtClass, Empty) { }
+
+ void setGotoLoc(SourceLocation L) { GotoLoc = L; }
+ SourceLocation getGotoLoc() const { return GotoLoc; }
+ void setStarLoc(SourceLocation L) { StarLoc = L; }
+ SourceLocation getStarLoc() const { return StarLoc; }
+
+ Expr *getTarget();
+ const Expr *getTarget() const;
+ void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(GotoLoc, Target->getLocEnd());
+ }
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == IndirectGotoStmtClass;
+ }
+ static bool classof(const IndirectGotoStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+
+/// ContinueStmt - This represents a continue.
+///
+class ContinueStmt : public Stmt {
+ SourceLocation ContinueLoc;
+public:
+ ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {}
+
+ /// \brief Build an empty continue statement.
+ explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { }
+
+ SourceLocation getContinueLoc() const { return ContinueLoc; }
+ void setContinueLoc(SourceLocation L) { ContinueLoc = L; }
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(ContinueLoc);
+ }
+
+ ContinueStmt* Clone(ASTContext &C) const;
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == ContinueStmtClass;
+ }
+ static bool classof(const ContinueStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// BreakStmt - This represents a break.
+///
+class BreakStmt : public Stmt {
+ SourceLocation BreakLoc;
+public:
+ BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {}
+
+ /// \brief Build an empty break statement.
+ explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { }
+
+ SourceLocation getBreakLoc() const { return BreakLoc; }
+ void setBreakLoc(SourceLocation L) { BreakLoc = L; }
+
+ virtual SourceRange getSourceRange() const { return SourceRange(BreakLoc); }
+
+ BreakStmt* Clone(ASTContext &C) const;
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == BreakStmtClass;
+ }
+ static bool classof(const BreakStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+
+/// ReturnStmt - This represents a return, optionally of an expression:
+/// return;
+/// return 4;
+///
+/// Note that GCC allows return with no argument in a function declared to
+/// return a value, and it allows returning a value in functions declared to
+/// return void. We explicitly model this in the AST, which means you can't
+/// depend on the return type of the function and the presence of an argument.
+///
+class ReturnStmt : public Stmt {
+ Stmt *RetExpr;
+ SourceLocation RetLoc;
+public:
+ ReturnStmt(SourceLocation RL, Expr *E = 0) : Stmt(ReturnStmtClass),
+ RetExpr((Stmt*) E), RetLoc(RL) {}
+
+ /// \brief Build an empty return expression.
+ explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { }
+
+ const Expr *getRetValue() const;
+ Expr *getRetValue();
+ void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); }
+
+ SourceLocation getReturnLoc() const { return RetLoc; }
+ void setReturnLoc(SourceLocation L) { RetLoc = L; }
+
+ virtual SourceRange getSourceRange() const;
+
+ static bool classof(const Stmt *T) {
+ return T->getStmtClass() == ReturnStmtClass;
+ }
+ static bool classof(const ReturnStmt *) { return true; }
+
+ // Iterators
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+/// AsmStmt - This represents a GNU inline-assembly statement extension.
+///
+class AsmStmt : public Stmt {
+ SourceLocation AsmLoc, RParenLoc;
+ StringLiteral *AsmStr;
+
+ bool IsSimple;
+ bool IsVolatile;
+
+ unsigned NumOutputs;
+ unsigned NumInputs;
+
+ llvm::SmallVector<std::string, 4> Names;
+ llvm::SmallVector<StringLiteral*, 4> Constraints;
+ llvm::SmallVector<Stmt*, 4> Exprs;
+
+ llvm::SmallVector<StringLiteral*, 4> Clobbers;
+public:
+ AsmStmt(SourceLocation asmloc, bool issimple, bool isvolatile,
+ unsigned numoutputs, unsigned numinputs,
+ std::string *names, StringLiteral **constraints,
+ Expr **exprs, StringLiteral *asmstr, unsigned numclobbers,
+ StringLiteral **clobbers, SourceLocation rparenloc);
+
+ /// \brief Build an empty inline-assembly statement.
+ explicit AsmStmt(EmptyShell Empty) : Stmt(AsmStmtClass, Empty) { }
+
+ SourceLocation getAsmLoc() const { return AsmLoc; }
+ void setAsmLoc(SourceLocation L) { AsmLoc = L; }
+ SourceLocation getRParenLoc() const { return RParenLoc; }
+ void setRParenLoc(SourceLocation L) { RParenLoc = L; }
+
+ bool isVolatile() const { return IsVolatile; }
+ void setVolatile(bool V) { IsVolatile = V; }
+ bool isSimple() const { return IsSimple; }
+ void setSimple(bool V) { IsSimple = false; }
+
+ //===--- Asm String Analysis ---===//
+
+ const StringLiteral *getAsmString() const { return AsmStr; }
+ StringLiteral *getAsmString() { return AsmStr; }
+ void setAsmString(StringLiteral *E) { AsmStr = E; }
+
+ /// AsmStringPiece - this is part of a decomposed asm string specification
+ /// (for use with the AnalyzeAsmString function below). An asm string is
+ /// considered to be a concatenation of these parts.
+ class AsmStringPiece {
+ public:
+ enum Kind {
+ String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%".
+ Operand // Operand reference, with optional modifier %c4.
+ };
+ private:
+ Kind MyKind;
+ std::string Str;
+ unsigned OperandNo;
+ public:
+ AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {}
+ AsmStringPiece(unsigned OpNo, char Modifier)
+ : MyKind(Operand), Str(), OperandNo(OpNo) {
+ Str += Modifier;
+ }
+
+ bool isString() const { return MyKind == String; }
+ bool isOperand() const { return MyKind == Operand; }
+
+ const std::string &getString() const {
+ assert(isString());
+ return Str;
+ }
+
+ unsigned getOperandNo() const {
+ assert(isOperand());
+ return OperandNo;
+ }
+
+ /// getModifier - Get the modifier for this operand, if present. This
+ /// returns '\0' if there was no modifier.
+ char getModifier() const {
+ assert(isOperand());
+ return Str[0];
+ }
+ };
+
+ /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing
+ /// it into pieces. If the asm string is erroneous, emit errors and return
+ /// true, otherwise return false. This handles canonicalization and
+ /// translation of strings from GCC syntax to LLVM IR syntax, and handles
+ //// flattening of named references like %[foo] to Operand AsmStringPiece's.
+ unsigned AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece> &Pieces,
+ ASTContext &C, unsigned &DiagOffs) const;
+
+
+ //===--- Output operands ---===//
+
+ unsigned getNumOutputs() const { return NumOutputs; }
+
+ const std::string &getOutputName(unsigned i) const {
+ return Names[i];
+ }
+
+ /// getOutputConstraint - Return the constraint string for the specified
+ /// output operand. All output constraints are known to be non-empty (either
+ /// '=' or '+').
+ std::string getOutputConstraint(unsigned i) const;
+
+ const StringLiteral *getOutputConstraintLiteral(unsigned i) const {
+ return Constraints[i];
+ }
+ StringLiteral *getOutputConstraintLiteral(unsigned i) {
+ return Constraints[i];
+ }
+
+
+ Expr *getOutputExpr(unsigned i);
+
+ const Expr *getOutputExpr(unsigned i) const {
+ return const_cast<AsmStmt*>(this)->getOutputExpr(i);
+ }
+
+ /// isOutputPlusConstraint - Return true if the specified output constraint
+ /// is a "+" constraint (which is both an input and an output) or false if it
+ /// is an "=" constraint (just an output).
+ bool isOutputPlusConstraint(unsigned i) const {
+ return getOutputConstraint(i)[0] == '+';
+ }
+
+ /// getNumPlusOperands - Return the number of output operands that have a "+"
+ /// constraint.
+ unsigned getNumPlusOperands() const;
+
+ //===--- Input operands ---===//
+
+ unsigned getNumInputs() const { return NumInputs; }
+
+ const std::string &getInputName(unsigned i) const {
+ return Names[i + NumOutputs];
+ }
+
+ /// getInputConstraint - Return the specified input constraint. Unlike output
+ /// constraints, these can be empty.
+ std::string getInputConstraint(unsigned i) const;
+
+ const StringLiteral *getInputConstraintLiteral(unsigned i) const {
+ return Constraints[i + NumOutputs];
+ }
+ StringLiteral *getInputConstraintLiteral(unsigned i) {
+ return Constraints[i + NumOutputs];
+ }
+
+
+ Expr *getInputExpr(unsigned i);
+
+ const Expr *getInputExpr(unsigned i) const {
+ return const_cast<AsmStmt*>(this)->getInputExpr(i);
+ }
+
+ void setOutputsAndInputs(unsigned NumOutputs,
+ unsigned NumInputs,
+ const std::string *Names,
+ StringLiteral **Constraints,
+ Stmt **Exprs);
+
+ //===--- Other ---===//
+
+ /// getNamedOperand - Given a symbolic operand reference like %[foo],
+ /// translate this into a numeric value needed to reference the same operand.
+ /// This returns -1 if the operand name is invalid.
+ int getNamedOperand(const std::string &SymbolicName) const;
+
+
+
+ unsigned getNumClobbers() const { return Clobbers.size(); }
+ StringLiteral *getClobber(unsigned i) { return Clobbers[i]; }
+ const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; }
+ void setClobbers(StringLiteral **Clobbers, unsigned NumClobbers);
+
+ virtual SourceRange getSourceRange() const {
+ return SourceRange(AsmLoc, RParenLoc);
+ }
+
+ static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;}
+ static bool classof(const AsmStmt *) { return true; }
+
+ // Input expr iterators.
+
+ typedef ExprIterator inputs_iterator;
+ typedef ConstExprIterator const_inputs_iterator;
+
+ inputs_iterator begin_inputs() {
+ return Exprs.data() + NumOutputs;
+ }
+
+ inputs_iterator end_inputs() {
+ return Exprs.data() + NumOutputs + NumInputs;
+ }
+
+ const_inputs_iterator begin_inputs() const {
+ return Exprs.data() + NumOutputs;
+ }
+
+ const_inputs_iterator end_inputs() const {
+ return Exprs.data() + NumOutputs + NumInputs;
+ }
+
+ // Output expr iterators.
+
+ typedef ExprIterator outputs_iterator;
+ typedef ConstExprIterator const_outputs_iterator;
+
+ outputs_iterator begin_outputs() {
+ return Exprs.data();
+ }
+ outputs_iterator end_outputs() {
+ return Exprs.data() + NumOutputs;
+ }
+
+ const_outputs_iterator begin_outputs() const {
+ return Exprs.data();
+ }
+ const_outputs_iterator end_outputs() const {
+ return Exprs.data() + NumOutputs;
+ }
+
+ // Input name iterator.
+
+ const std::string *begin_output_names() const {
+ return &Names[0];
+ }
+
+ const std::string *end_output_names() const {
+ return &Names[0] + NumOutputs;
+ }
+
+ // Child iterators
+
+ virtual child_iterator child_begin();
+ virtual child_iterator child_end();
+};
+
+} // end namespace clang
+
+#endif
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