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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 "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/StmtIterator.h"
#include "clang/AST/DeclGroup.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Attr.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/raw_ostream.h"
#include <string>
namespace llvm {
class FoldingSetNodeID;
}
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 {
const Stmt * const *I;
public:
ConstExprIterator(const Stmt * const *i) : I(i) {}
ConstExprIterator() : I(0) {}
ConstExprIterator& operator++() { ++I; return *this; }
ConstExprIterator operator+(size_t i) const { return I+i; }
ConstExprIterator operator-(size_t i) const { 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 STMT_RANGE(BASE, FIRST, LAST) \
first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class,
#define LAST_STMT_RANGE(BASE, FIRST, LAST) \
first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class
#define ABSTRACT_STMT(STMT)
#include "clang/AST/StmtNodes.inc"
};
// Make vanilla 'new' and 'delete' illegal for Stmts.
protected:
void* operator new(size_t bytes) throw() {
llvm_unreachable("Stmts cannot be allocated with regular 'new'.");
}
void operator delete(void* data) throw() {
llvm_unreachable("Stmts cannot be released with regular 'delete'.");
}
class StmtBitfields {
friend class Stmt;
/// \brief The statement class.
unsigned sClass : 8;
};
enum { NumStmtBits = 8 };
class CompoundStmtBitfields {
friend class CompoundStmt;
unsigned : NumStmtBits;
unsigned NumStmts : 32 - NumStmtBits;
};
class ExprBitfields {
friend class Expr;
friend class DeclRefExpr; // computeDependence
friend class InitListExpr; // ctor
friend class DesignatedInitExpr; // ctor
friend class BlockDeclRefExpr; // ctor
friend class ASTStmtReader; // deserialization
friend class CXXNewExpr; // ctor
friend class DependentScopeDeclRefExpr; // ctor
friend class CXXConstructExpr; // ctor
friend class CallExpr; // ctor
friend class OffsetOfExpr; // ctor
friend class ObjCMessageExpr; // ctor
friend class ObjCArrayLiteral; // ctor
friend class ObjCDictionaryLiteral; // ctor
friend class ShuffleVectorExpr; // ctor
friend class ParenListExpr; // ctor
friend class CXXUnresolvedConstructExpr; // ctor
friend class CXXDependentScopeMemberExpr; // ctor
friend class OverloadExpr; // ctor
friend class PseudoObjectExpr; // ctor
friend class AtomicExpr; // ctor
unsigned : NumStmtBits;
unsigned ValueKind : 2;
unsigned ObjectKind : 2;
unsigned TypeDependent : 1;
unsigned ValueDependent : 1;
unsigned InstantiationDependent : 1;
unsigned ContainsUnexpandedParameterPack : 1;
};
enum { NumExprBits = 16 };
class CharacterLiteralBitfields {
friend class CharacterLiteral;
unsigned : NumExprBits;
unsigned Kind : 2;
};
class FloatingLiteralBitfields {
friend class FloatingLiteral;
unsigned : NumExprBits;
unsigned IsIEEE : 1; // Distinguishes between PPC128 and IEEE128.
unsigned IsExact : 1;
};
class UnaryExprOrTypeTraitExprBitfields {
friend class UnaryExprOrTypeTraitExpr;
unsigned : NumExprBits;
unsigned Kind : 2;
unsigned IsType : 1; // true if operand is a type, false if an expression.
};
class DeclRefExprBitfields {
friend class DeclRefExpr;
friend class ASTStmtReader; // deserialization
unsigned : NumExprBits;
unsigned HasQualifier : 1;
unsigned HasTemplateKWAndArgsInfo : 1;
unsigned HasFoundDecl : 1;
unsigned HadMultipleCandidates : 1;
unsigned RefersToEnclosingLocal : 1;
};
class CastExprBitfields {
friend class CastExpr;
unsigned : NumExprBits;
unsigned Kind : 6;
unsigned BasePathSize : 32 - 6 - NumExprBits;
};
class CallExprBitfields {
friend class CallExpr;
unsigned : NumExprBits;
unsigned NumPreArgs : 1;
};
class ExprWithCleanupsBitfields {
friend class ExprWithCleanups;
friend class ASTStmtReader; // deserialization
unsigned : NumExprBits;
unsigned NumObjects : 32 - NumExprBits;
};
class PseudoObjectExprBitfields {
friend class PseudoObjectExpr;
friend class ASTStmtReader; // deserialization
unsigned : NumExprBits;
// These don't need to be particularly wide, because they're
// strictly limited by the forms of expressions we permit.
unsigned NumSubExprs : 8;
unsigned ResultIndex : 32 - 8 - NumExprBits;
};
class ObjCIndirectCopyRestoreExprBitfields {
friend class ObjCIndirectCopyRestoreExpr;
unsigned : NumExprBits;
unsigned ShouldCopy : 1;
};
class InitListExprBitfields {
friend class InitListExpr;
unsigned : NumExprBits;
/// Whether this initializer list originally had a GNU array-range
/// designator in it. This is a temporary marker used by CodeGen.
unsigned HadArrayRangeDesignator : 1;
/// Whether this initializer list initializes a std::initializer_list
/// object.
unsigned InitializesStdInitializerList : 1;
};
class TypeTraitExprBitfields {
friend class TypeTraitExpr;
friend class ASTStmtReader;
friend class ASTStmtWriter;
unsigned : NumExprBits;
/// \brief The kind of type trait, which is a value of a TypeTrait enumerator.
unsigned Kind : 8;
/// \brief If this expression is not value-dependent, this indicates whether
/// the trait evaluated true or false.
unsigned Value : 1;
/// \brief The number of arguments to this type trait.
unsigned NumArgs : 32 - 8 - 1 - NumExprBits;
};
union {
// FIXME: this is wasteful on 64-bit platforms.
void *Aligner;
StmtBitfields StmtBits;
CompoundStmtBitfields CompoundStmtBits;
ExprBitfields ExprBits;
CharacterLiteralBitfields CharacterLiteralBits;
FloatingLiteralBitfields FloatingLiteralBits;
UnaryExprOrTypeTraitExprBitfields UnaryExprOrTypeTraitExprBits;
DeclRefExprBitfields DeclRefExprBits;
CastExprBitfields CastExprBits;
CallExprBitfields CallExprBits;
ExprWithCleanupsBitfields ExprWithCleanupsBits;
PseudoObjectExprBitfields PseudoObjectExprBits;
ObjCIndirectCopyRestoreExprBitfields ObjCIndirectCopyRestoreExprBits;
InitListExprBitfields InitListExprBits;
TypeTraitExprBitfields TypeTraitExprBits;
};
friend class ASTStmtReader;
friend class ASTStmtWriter;
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 = 8) throw() {
return ::operator new(bytes, C, alignment);
}
void* operator new(size_t bytes, ASTContext* C,
unsigned alignment = 8) 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 { };
private:
/// \brief Whether statistic collection is enabled.
static bool StatisticsEnabled;
protected:
/// \brief Construct an empty statement.
explicit Stmt(StmtClass SC, EmptyShell) {
StmtBits.sClass = SC;
if (StatisticsEnabled) Stmt::addStmtClass(SC);
}
public:
Stmt(StmtClass SC) {
StmtBits.sClass = SC;
if (StatisticsEnabled) Stmt::addStmtClass(SC);
}
StmtClass getStmtClass() const {
return static_cast<StmtClass>(StmtBits.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.
SourceRange getSourceRange() const LLVM_READONLY;
SourceLocation getLocStart() const LLVM_READONLY;
SourceLocation getLocEnd() const LLVM_READONLY;
// global temp stats (until we have a per-module visitor)
static void addStmtClass(const StmtClass s);
static void EnableStatistics();
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.
LLVM_ATTRIBUTE_USED void dump() const;
LLVM_ATTRIBUTE_USED void dump(SourceManager &SM) const;
void dump(raw_ostream &OS, 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(raw_ostream &OS, PrinterHelper *Helper,
const PrintingPolicy &Policy,
unsigned Indentation = 0) const {
printPretty(OS, *(ASTContext*)0, Helper, Policy, Indentation);
}
void printPretty(raw_ostream &OS, ASTContext &Context,
PrinterHelper *Helper,
const PrintingPolicy &Policy,
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;
/// Skip past any implicit AST nodes which might surround this
/// statement, such as ExprWithCleanups or ImplicitCastExpr nodes.
Stmt *IgnoreImplicit();
const Stmt *stripLabelLikeStatements() const;
Stmt *stripLabelLikeStatements() {
return const_cast<Stmt*>(
const_cast<const Stmt*>(this)->stripLabelLikeStatements());
}
// 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 'children'
/// 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;
typedef StmtRange child_range;
typedef ConstStmtRange const_child_range;
child_range children();
const_child_range children() const {
return const_cast<Stmt*>(this)->children();
}
child_iterator child_begin() { return children().first; }
child_iterator child_end() { return children().second; }
const_child_iterator child_begin() const { return children().first; }
const_child_iterator child_end() const { return children().second; }
/// \brief Produce a unique representation of the given statement.
///
/// \brief ID once the profiling operation is complete, will contain
/// the unique representation of the given statement.
///
/// \brief Context the AST context in which the statement resides
///
/// \brief Canonical whether the profile should be based on the canonical
/// representation of this statement (e.g., where non-type template
/// parameters are identified by index/level rather than their
/// declaration pointers) or the exact representation of the statement as
/// written in the source.
void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context,
bool Canonical) const;
};
/// 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) { }
/// 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 LLVM_READONLY {
return SourceRange(StartLoc, EndLoc);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == DeclStmtClass;
}
static bool classof(const DeclStmt *) { return true; }
// Iterators over subexpressions.
child_range children() {
return child_range(child_iterator(DG.begin(), DG.end()),
child_iterator(DG.end(), DG.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;
/// \brief True if the null statement was preceded by an empty macro, e.g:
/// @code
/// #define CALL(x)
/// CALL(0);
/// @endcode
bool HasLeadingEmptyMacro;
public:
NullStmt(SourceLocation L, bool hasLeadingEmptyMacro = false)
: Stmt(NullStmtClass), SemiLoc(L),
HasLeadingEmptyMacro(hasLeadingEmptyMacro) {}
/// \brief Build an empty null statement.
explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty),
HasLeadingEmptyMacro(false) { }
SourceLocation getSemiLoc() const { return SemiLoc; }
void setSemiLoc(SourceLocation L) { SemiLoc = L; }
bool hasLeadingEmptyMacro() const { return HasLeadingEmptyMacro; }
SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(SemiLoc); }
static bool classof(const Stmt *T) {
return T->getStmtClass() == NullStmtClass;
}
static bool classof(const NullStmt *) { return true; }
child_range children() { return child_range(); }
friend class ASTStmtReader;
friend class ASTStmtWriter;
};
/// CompoundStmt - This represents a group of statements like { stmt stmt }.
///
class CompoundStmt : public Stmt {
Stmt** Body;
SourceLocation LBracLoc, RBracLoc;
public:
CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned NumStmts,
SourceLocation LB, SourceLocation RB)
: Stmt(CompoundStmtClass), LBracLoc(LB), RBracLoc(RB) {
CompoundStmtBits.NumStmts = NumStmts;
assert(CompoundStmtBits.NumStmts == NumStmts &&
"NumStmts doesn't fit in bits of CompoundStmtBits.NumStmts!");
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) {
CompoundStmtBits.NumStmts = 0;
}
void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts);
bool body_empty() const { return CompoundStmtBits.NumStmts == 0; }
unsigned size() const { return CompoundStmtBits.NumStmts; }
typedef Stmt** body_iterator;
body_iterator body_begin() { return Body; }
body_iterator body_end() { return Body + size(); }
Stmt *body_back() { return !body_empty() ? Body[size()-1] : 0; }
void setLastStmt(Stmt *S) {
assert(!body_empty() && "setLastStmt");
Body[size()-1] = S;
}
typedef Stmt* const * const_body_iterator;
const_body_iterator body_begin() const { return Body; }
const_body_iterator body_end() const { return Body + size(); }
const Stmt *body_back() const { return !body_empty() ? Body[size()-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());
}
SourceRange getSourceRange() const LLVM_READONLY {
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
child_range children() {
return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts);
}
const_child_range children() const {
return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts);
}
};
// 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();
const Stmt *getSubStmt() const {
return const_cast<SwitchCase*>(this)->getSubStmt();
}
SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); }
static bool classof(const Stmt *T) {
return T->getStmtClass() == CaseStmtClass ||
T->getStmtClass() == DefaultStmtClass;
}
static bool classof(const SwitchCase *) { return true; }
};
class CaseStmt : public SwitchCase {
enum { LHS, RHS, SUBSTMT, 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;
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); }
SourceRange getSourceRange() const LLVM_READONLY {
// 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
child_range children() {
return child_range(&SubExprs[0], &SubExprs[END_EXPR]);
}
};
class DefaultStmt : public SwitchCase {
Stmt* SubStmt;
SourceLocation DefaultLoc;
SourceLocation ColonLoc;
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; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(DefaultLoc, SubStmt->getLocEnd());
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == DefaultStmtClass;
}
static bool classof(const DefaultStmt *) { return true; }
// Iterators
child_range children() { return child_range(&SubStmt, &SubStmt+1); }
};
/// LabelStmt - Represents a label, which has a substatement. For example:
/// foo: return;
///
class LabelStmt : public Stmt {
LabelDecl *TheDecl;
Stmt *SubStmt;
SourceLocation IdentLoc;
public:
LabelStmt(SourceLocation IL, LabelDecl *D, Stmt *substmt)
: Stmt(LabelStmtClass), TheDecl(D), SubStmt(substmt), IdentLoc(IL) {
}
// \brief Build an empty label statement.
explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { }
SourceLocation getIdentLoc() const { return IdentLoc; }
LabelDecl *getDecl() const { return TheDecl; }
void setDecl(LabelDecl *D) { TheDecl = D; }
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; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(IdentLoc, SubStmt->getLocEnd());
}
child_range children() { return child_range(&SubStmt, &SubStmt+1); }
static bool classof(const Stmt *T) {
return T->getStmtClass() == LabelStmtClass;
}
static bool classof(const LabelStmt *) { return true; }
};
/// \brief Represents an attribute applied to a statement.
///
/// Represents an attribute applied to a statement. For example:
/// [[omp::for(...)]] for (...) { ... }
///
class AttributedStmt : public Stmt {
Stmt *SubStmt;
SourceLocation AttrLoc;
AttrVec Attrs;
// TODO: It can be done as Attr *Attrs[1]; and variable size array as in
// StringLiteral
friend class ASTStmtReader;
public:
AttributedStmt(SourceLocation loc, const AttrVec &attrs, Stmt *substmt)
: Stmt(AttributedStmtClass), SubStmt(substmt), AttrLoc(loc), Attrs(attrs) {
}
// \brief Build an empty attributed statement.
explicit AttributedStmt(EmptyShell Empty)
: Stmt(AttributedStmtClass, Empty) {
}
SourceLocation getAttrLoc() const { return AttrLoc; }
const AttrVec &getAttrs() const { return Attrs; }
Stmt *getSubStmt() { return SubStmt; }
const Stmt *getSubStmt() const { return SubStmt; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(AttrLoc, SubStmt->getLocEnd());
}
child_range children() { return child_range(&SubStmt, &SubStmt + 1); }
static bool classof(const Stmt *T) {
return T->getStmtClass() == AttributedStmtClass;
}
static bool classof(const AttributedStmt *) { return true; }
};
/// IfStmt - This represents an if/then/else.
///
class IfStmt : public Stmt {
enum { VAR, COND, THEN, ELSE, END_EXPR };
Stmt* SubExprs[END_EXPR];
SourceLocation IfLoc;
SourceLocation ElseLoc;
public:
IfStmt(ASTContext &C, SourceLocation IL, VarDecl *var, Expr *cond,
Stmt *then, SourceLocation EL = SourceLocation(), Stmt *elsev = 0);
/// \brief Build an empty if/then/else statement
explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { }
/// \brief Retrieve the variable declared in this "if" statement, if any.
///
/// In the following example, "x" is the condition variable.
/// \code
/// if (int x = foo()) {
/// printf("x is %d", x);
/// }
/// \endcode
VarDecl *getConditionVariable() const;
void setConditionVariable(ASTContext &C, VarDecl *V);
/// If this IfStmt has a condition variable, return the faux DeclStmt
/// associated with the creation of that condition variable.
const DeclStmt *getConditionVariableDeclStmt() const {
return reinterpret_cast<DeclStmt*>(SubExprs[VAR]);
}
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; }
SourceRange getSourceRange() const LLVM_READONLY {
if (SubExprs[ELSE])
return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd());
else
return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd());
}
// Iterators over subexpressions. The iterators will include iterating
// over the initialization expression referenced by the condition variable.
child_range children() {
return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == IfStmtClass;
}
static bool classof(const IfStmt *) { return true; }
};
/// SwitchStmt - This represents a 'switch' stmt.
///
class SwitchStmt : public Stmt {
enum { VAR, COND, BODY, END_EXPR };
Stmt* SubExprs[END_EXPR];
// This points to a linked list of case and default statements.
SwitchCase *FirstCase;
SourceLocation SwitchLoc;
/// If the SwitchStmt is a switch on an enum value, this records whether
/// all the enum values were covered by CaseStmts. This value is meant to
/// be a hint for possible clients.
unsigned AllEnumCasesCovered : 1;
public:
SwitchStmt(ASTContext &C, VarDecl *Var, Expr *cond);
/// \brief Build a empty switch statement.
explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { }
/// \brief Retrieve the variable declared in this "switch" statement, if any.
///
/// In the following example, "x" is the condition variable.
/// \code
/// switch (int x = foo()) {
/// case 0: break;
/// // ...
/// }
/// \endcode
VarDecl *getConditionVariable() const;
void setConditionVariable(ASTContext &C, VarDecl *V);
/// If this SwitchStmt has a condition variable, return the faux DeclStmt
/// associated with the creation of that condition variable.
const DeclStmt *getConditionVariableDeclStmt() const {
return reinterpret_cast<DeclStmt*>(SubExprs[VAR]);
}
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; }
/// \brief Set the case list for this switch statement.
///
/// The caller is responsible for incrementing the retain counts on
/// all of the SwitchCase statements in this list.
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;
}
/// Set a flag in the SwitchStmt indicating that if the 'switch (X)' is a
/// switch over an enum value then all cases have been explicitly covered.
void setAllEnumCasesCovered() {
AllEnumCasesCovered = 1;
}
/// Returns true if the SwitchStmt is a switch of an enum value and all cases
/// have been explicitly covered.
bool isAllEnumCasesCovered() const {
return (bool) AllEnumCasesCovered;
}
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd());
}
// Iterators
child_range children() {
return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == SwitchStmtClass;
}
static bool classof(const SwitchStmt *) { return true; }
};
/// WhileStmt - This represents a 'while' stmt.
///
class WhileStmt : public Stmt {
enum { VAR, COND, BODY, END_EXPR };
Stmt* SubExprs[END_EXPR];
SourceLocation WhileLoc;
public:
WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body,
SourceLocation WL);
/// \brief Build an empty while statement.
explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { }
/// \brief Retrieve the variable declared in this "while" statement, if any.
///
/// In the following example, "x" is the condition variable.
/// \code
/// while (int x = random()) {
/// // ...
/// }
/// \endcode
VarDecl *getConditionVariable() const;
void setConditionVariable(ASTContext &C, VarDecl *V);
/// If this WhileStmt has a condition variable, return the faux DeclStmt
/// associated with the creation of that condition variable.
const DeclStmt *getConditionVariableDeclStmt() const {
return reinterpret_cast<DeclStmt*>(SubExprs[VAR]);
}
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; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd());
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == WhileStmtClass;
}
static bool classof(const WhileStmt *) { return true; }
// Iterators
child_range children() {
return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR);
}
};
/// DoStmt - This represents a 'do/while' stmt.
///
class DoStmt : public Stmt {
enum { BODY, COND, END_EXPR };
Stmt* SubExprs[END_EXPR];
SourceLocation DoLoc;
SourceLocation WhileLoc;
SourceLocation RParenLoc; // Location of final ')' in do stmt condition.
public:
DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL,
SourceLocation RP)
: Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) {
SubExprs[COND] = reinterpret_cast<Stmt*>(cond);
SubExprs[BODY] = body;
}
/// \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; }
SourceLocation getRParenLoc() const { return RParenLoc; }
void setRParenLoc(SourceLocation L) { RParenLoc = L; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(DoLoc, RParenLoc);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == DoStmtClass;
}
static bool classof(const DoStmt *) { return true; }
// Iterators
child_range children() {
return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR);
}
};
/// 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, CONDVAR, COND, INC, BODY, END_EXPR };
Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt.
SourceLocation ForLoc;
SourceLocation LParenLoc, RParenLoc;
public:
ForStmt(ASTContext &C, Stmt *Init, Expr *Cond, VarDecl *condVar, Expr *Inc,
Stmt *Body, SourceLocation FL, SourceLocation LP, SourceLocation RP);
/// \brief Build an empty for statement.
explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { }
Stmt *getInit() { return SubExprs[INIT]; }
/// \brief Retrieve the variable declared in this "for" statement, if any.
///
/// In the following example, "y" is the condition variable.
/// \code
/// for (int x = random(); int y = mangle(x); ++x) {
/// // ...
/// }
/// \endcode
VarDecl *getConditionVariable() const;
void setConditionVariable(ASTContext &C, VarDecl *V);
/// If this ForStmt has a condition variable, return the faux DeclStmt
/// associated with the creation of that condition variable.
const DeclStmt *getConditionVariableDeclStmt() const {
return reinterpret_cast<DeclStmt*>(SubExprs[CONDVAR]);
}
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; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd());
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == ForStmtClass;
}
static bool classof(const ForStmt *) { return true; }
// Iterators
child_range children() {
return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR);
}
};
/// GotoStmt - This represents a direct goto.
///
class GotoStmt : public Stmt {
LabelDecl *Label;
SourceLocation GotoLoc;
SourceLocation LabelLoc;
public:
GotoStmt(LabelDecl *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) { }
LabelDecl *getLabel() const { return Label; }
void setLabel(LabelDecl *D) { Label = D; }
SourceLocation getGotoLoc() const { return GotoLoc; }
void setGotoLoc(SourceLocation L) { GotoLoc = L; }
SourceLocation getLabelLoc() const { return LabelLoc; }
void setLabelLoc(SourceLocation L) { LabelLoc = L; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(GotoLoc, LabelLoc);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == GotoStmtClass;
}
static bool classof(const GotoStmt *) { return true; }
// Iterators
child_range children() { return child_range(); }
};
/// 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() { return reinterpret_cast<Expr*>(Target); }
const Expr *getTarget() const {return reinterpret_cast<const Expr*>(Target);}
void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); }
/// getConstantTarget - Returns the fixed target of this indirect
/// goto, if one exists.
LabelDecl *getConstantTarget();
const LabelDecl *getConstantTarget() const {
return const_cast<IndirectGotoStmt*>(this)->getConstantTarget();
}
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(GotoLoc, Target->getLocEnd());
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == IndirectGotoStmtClass;
}
static bool classof(const IndirectGotoStmt *) { return true; }
// Iterators
child_range children() { return child_range(&Target, &Target+1); }
};
/// 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; }
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(ContinueLoc);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == ContinueStmtClass;
}
static bool classof(const ContinueStmt *) { return true; }
// Iterators
child_range children() { return child_range(); }
};
/// 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; }
SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(BreakLoc); }
static bool classof(const Stmt *T) {
return T->getStmtClass() == BreakStmtClass;
}
static bool classof(const BreakStmt *) { return true; }
// Iterators
child_range children() { return child_range(); }
};
/// 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;
const VarDecl *NRVOCandidate;
public:
ReturnStmt(SourceLocation RL)
: Stmt(ReturnStmtClass), RetExpr(0), RetLoc(RL), NRVOCandidate(0) { }
ReturnStmt(SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate)
: Stmt(ReturnStmtClass), RetExpr((Stmt*) E), RetLoc(RL),
NRVOCandidate(NRVOCandidate) {}
/// \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; }
/// \brief Retrieve the variable that might be used for the named return
/// value optimization.
///
/// The optimization itself can only be performed if the variable is
/// also marked as an NRVO object.
const VarDecl *getNRVOCandidate() const { return NRVOCandidate; }
void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; }
SourceRange getSourceRange() const LLVM_READONLY;
static bool classof(const Stmt *T) {
return T->getStmtClass() == ReturnStmtClass;
}
static bool classof(const ReturnStmt *) { return true; }
// Iterators
child_range children() {
if (RetExpr) return child_range(&RetExpr, &RetExpr+1);
return child_range();
}
};
/// AsmStmt - This represents a GNU inline-assembly statement extension.
///
class AsmStmt : public Stmt {
SourceLocation AsmLoc, RParenLoc;
StringLiteral *AsmStr;
bool IsSimple;
bool IsVolatile;
bool MSAsm;
unsigned NumOutputs;
unsigned NumInputs;
unsigned NumClobbers;
// FIXME: If we wanted to, we could allocate all of these in one big array.
IdentifierInfo **Names;
StringLiteral **Constraints;
Stmt **Exprs;
StringLiteral **Clobbers;
public:
AsmStmt(ASTContext &C, SourceLocation asmloc, bool issimple, bool isvolatile,
bool msasm, unsigned numoutputs, unsigned numinputs,
IdentifierInfo **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),
Names(0), Constraints(0), Exprs(0), Clobbers(0) { }
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 = V; }
bool isMSAsm() const { return MSAsm; }
void setMSAsm(bool V) { MSAsm = V; }
//===--- 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(SmallVectorImpl<AsmStringPiece> &Pieces,
ASTContext &C, unsigned &DiagOffs) const;
//===--- Output operands ---===//
unsigned getNumOutputs() const { return NumOutputs; }
IdentifierInfo *getOutputIdentifier(unsigned i) const {
return Names[i];
}
StringRef getOutputName(unsigned i) const {
if (IdentifierInfo *II = getOutputIdentifier(i))
return II->getName();
return StringRef();
}
/// getOutputConstraint - Return the constraint string for the specified
/// output operand. All output constraints are known to be non-empty (either
/// '=' or '+').
StringRef 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; }
IdentifierInfo *getInputIdentifier(unsigned i) const {
return Names[i + NumOutputs];
}
StringRef getInputName(unsigned i) const {
if (IdentifierInfo *II = getInputIdentifier(i))
return II->getName();
return StringRef();
}
/// getInputConstraint - Return the specified input constraint. Unlike output
/// constraints, these can be empty.
StringRef 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);
void setInputExpr(unsigned i, Expr *E);
const Expr *getInputExpr(unsigned i) const {
return const_cast<AsmStmt*>(this)->getInputExpr(i);
}
void setOutputsAndInputsAndClobbers(ASTContext &C,
IdentifierInfo **Names,
StringLiteral **Constraints,
Stmt **Exprs,
unsigned NumOutputs,
unsigned NumInputs,
StringLiteral **Clobbers,
unsigned NumClobbers);
//===--- 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(StringRef SymbolicName) const;
unsigned getNumClobbers() const { return NumClobbers; }
StringLiteral *getClobber(unsigned i) { return Clobbers[i]; }
const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; }
SourceRange getSourceRange() const LLVM_READONLY {
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[0] + NumOutputs;
}
inputs_iterator end_inputs() {
return &Exprs[0] + NumOutputs + NumInputs;
}
const_inputs_iterator begin_inputs() const {
return &Exprs[0] + NumOutputs;
}
const_inputs_iterator end_inputs() const {
return &Exprs[0] + NumOutputs + NumInputs;
}
// Output expr iterators.
typedef ExprIterator outputs_iterator;
typedef ConstExprIterator const_outputs_iterator;
outputs_iterator begin_outputs() {
return &Exprs[0];
}
outputs_iterator end_outputs() {
return &Exprs[0] + NumOutputs;
}
const_outputs_iterator begin_outputs() const {
return &Exprs[0];
}
const_outputs_iterator end_outputs() const {
return &Exprs[0] + NumOutputs;
}
child_range children() {
return child_range(&Exprs[0], &Exprs[0] + NumOutputs + NumInputs);
}
};
class SEHExceptStmt : public Stmt {
SourceLocation Loc;
Stmt *Children[2];
enum { FILTER_EXPR, BLOCK };
SEHExceptStmt(SourceLocation Loc,
Expr *FilterExpr,
Stmt *Block);
friend class ASTReader;
friend class ASTStmtReader;
explicit SEHExceptStmt(EmptyShell E) : Stmt(SEHExceptStmtClass, E) { }
public:
static SEHExceptStmt* Create(ASTContext &C,
SourceLocation ExceptLoc,
Expr *FilterExpr,
Stmt *Block);
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(getExceptLoc(), getEndLoc());
}
SourceLocation getExceptLoc() const { return Loc; }
SourceLocation getEndLoc() const { return getBlock()->getLocEnd(); }
Expr *getFilterExpr() const {
return reinterpret_cast<Expr*>(Children[FILTER_EXPR]);
}
CompoundStmt *getBlock() const {
return llvm::cast<CompoundStmt>(Children[BLOCK]);
}
child_range children() {
return child_range(Children,Children+2);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == SEHExceptStmtClass;
}
static bool classof(SEHExceptStmt *) { return true; }
};
class SEHFinallyStmt : public Stmt {
SourceLocation Loc;
Stmt *Block;
SEHFinallyStmt(SourceLocation Loc,
Stmt *Block);
friend class ASTReader;
friend class ASTStmtReader;
explicit SEHFinallyStmt(EmptyShell E) : Stmt(SEHFinallyStmtClass, E) { }
public:
static SEHFinallyStmt* Create(ASTContext &C,
SourceLocation FinallyLoc,
Stmt *Block);
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(getFinallyLoc(), getEndLoc());
}
SourceLocation getFinallyLoc() const { return Loc; }
SourceLocation getEndLoc() const { return Block->getLocEnd(); }
CompoundStmt *getBlock() const { return llvm::cast<CompoundStmt>(Block); }
child_range children() {
return child_range(&Block,&Block+1);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == SEHFinallyStmtClass;
}
static bool classof(SEHFinallyStmt *) { return true; }
};
class SEHTryStmt : public Stmt {
bool IsCXXTry;
SourceLocation TryLoc;
Stmt *Children[2];
enum { TRY = 0, HANDLER = 1 };
SEHTryStmt(bool isCXXTry, // true if 'try' otherwise '__try'
SourceLocation TryLoc,
Stmt *TryBlock,
Stmt *Handler);
friend class ASTReader;
friend class ASTStmtReader;
explicit SEHTryStmt(EmptyShell E) : Stmt(SEHTryStmtClass, E) { }
public:
static SEHTryStmt* Create(ASTContext &C,
bool isCXXTry,
SourceLocation TryLoc,
Stmt *TryBlock,
Stmt *Handler);
SourceRange getSourceRange() const LLVM_READONLY {
return SourceRange(getTryLoc(), getEndLoc());
}
SourceLocation getTryLoc() const { return TryLoc; }
SourceLocation getEndLoc() const { return Children[HANDLER]->getLocEnd(); }
bool getIsCXXTry() const { return IsCXXTry; }
CompoundStmt* getTryBlock() const {
return llvm::cast<CompoundStmt>(Children[TRY]);
}
Stmt *getHandler() const { return Children[HANDLER]; }
/// Returns 0 if not defined
SEHExceptStmt *getExceptHandler() const;
SEHFinallyStmt *getFinallyHandler() const;
child_range children() {
return child_range(Children,Children+2);
}
static bool classof(const Stmt *T) {
return T->getStmtClass() == SEHTryStmtClass;
}
static bool classof(SEHTryStmt *) { return true; }
};
} // end namespace clang
#endif