Stmt.h revision 0a9beb52baa6c990d45d638a177d9456e650282a
1//===--- Stmt.h - Classes for representing statements -----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Stmt interface and subclasses. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_AST_STMT_H 15#define LLVM_CLANG_AST_STMT_H 16 17#include "llvm/Support/Casting.h" 18#include "llvm/Support/raw_ostream.h" 19#include "clang/Basic/SourceLocation.h" 20#include "clang/AST/PrettyPrinter.h" 21#include "clang/AST/StmtIterator.h" 22#include "clang/AST/DeclGroup.h" 23#include "llvm/ADT/SmallVector.h" 24#include "clang/AST/ASTContext.h" 25#include <string> 26using llvm::dyn_cast_or_null; 27 28namespace llvm { 29 class FoldingSetNodeID; 30} 31 32namespace clang { 33 class ASTContext; 34 class Expr; 35 class Decl; 36 class ParmVarDecl; 37 class QualType; 38 class IdentifierInfo; 39 class SourceManager; 40 class StringLiteral; 41 class SwitchStmt; 42 43 //===----------------------------------------------------------------------===// 44 // ExprIterator - Iterators for iterating over Stmt* arrays that contain 45 // only Expr*. This is needed because AST nodes use Stmt* arrays to store 46 // references to children (to be compatible with StmtIterator). 47 //===----------------------------------------------------------------------===// 48 49 class Stmt; 50 class Expr; 51 52 class ExprIterator { 53 Stmt** I; 54 public: 55 ExprIterator(Stmt** i) : I(i) {} 56 ExprIterator() : I(0) {} 57 ExprIterator& operator++() { ++I; return *this; } 58 ExprIterator operator-(size_t i) { return I-i; } 59 ExprIterator operator+(size_t i) { return I+i; } 60 Expr* operator[](size_t idx); 61 // FIXME: Verify that this will correctly return a signed distance. 62 signed operator-(const ExprIterator& R) const { return I - R.I; } 63 Expr* operator*() const; 64 Expr* operator->() const; 65 bool operator==(const ExprIterator& R) const { return I == R.I; } 66 bool operator!=(const ExprIterator& R) const { return I != R.I; } 67 bool operator>(const ExprIterator& R) const { return I > R.I; } 68 bool operator>=(const ExprIterator& R) const { return I >= R.I; } 69 }; 70 71 class ConstExprIterator { 72 const Stmt * const *I; 73 public: 74 ConstExprIterator(const Stmt * const *i) : I(i) {} 75 ConstExprIterator() : I(0) {} 76 ConstExprIterator& operator++() { ++I; return *this; } 77 ConstExprIterator operator+(size_t i) const { return I+i; } 78 ConstExprIterator operator-(size_t i) const { return I-i; } 79 const Expr * operator[](size_t idx) const; 80 signed operator-(const ConstExprIterator& R) const { return I - R.I; } 81 const Expr * operator*() const; 82 const Expr * operator->() const; 83 bool operator==(const ConstExprIterator& R) const { return I == R.I; } 84 bool operator!=(const ConstExprIterator& R) const { return I != R.I; } 85 bool operator>(const ConstExprIterator& R) const { return I > R.I; } 86 bool operator>=(const ConstExprIterator& R) const { return I >= R.I; } 87 }; 88 89//===----------------------------------------------------------------------===// 90// AST classes for statements. 91//===----------------------------------------------------------------------===// 92 93/// Stmt - This represents one statement. 94/// 95class Stmt { 96public: 97 enum StmtClass { 98 NoStmtClass = 0, 99#define STMT(CLASS, PARENT) CLASS##Class, 100#define STMT_RANGE(BASE, FIRST, LAST) \ 101 first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class, 102#define LAST_STMT_RANGE(BASE, FIRST, LAST) \ 103 first##BASE##Constant=FIRST##Class, last##BASE##Constant=LAST##Class 104#define ABSTRACT_STMT(STMT) 105#include "clang/AST/StmtNodes.inc" 106 }; 107 108 // Make vanilla 'new' and 'delete' illegal for Stmts. 109protected: 110 void* operator new(size_t bytes) throw() { 111 assert(0 && "Stmts cannot be allocated with regular 'new'."); 112 return 0; 113 } 114 void operator delete(void* data) throw() { 115 assert(0 && "Stmts cannot be released with regular 'delete'."); 116 } 117 118 class StmtBitfields { 119 friend class Stmt; 120 121 /// \brief The statement class. 122 unsigned sClass : 8; 123 }; 124 enum { NumStmtBits = 8 }; 125 126 class CompoundStmtBitfields { 127 friend class CompoundStmt; 128 unsigned : NumStmtBits; 129 130 unsigned NumStmts : 32 - NumStmtBits; 131 }; 132 133 class ExprBitfields { 134 friend class Expr; 135 friend class DeclRefExpr; // computeDependence 136 friend class InitListExpr; // ctor 137 friend class DesignatedInitExpr; // ctor 138 friend class BlockDeclRefExpr; // ctor 139 friend class ASTStmtReader; // deserialization 140 friend class CXXNewExpr; // ctor 141 friend class DependentScopeDeclRefExpr; // ctor 142 friend class CXXConstructExpr; // ctor 143 friend class CallExpr; // ctor 144 friend class OffsetOfExpr; // ctor 145 friend class ObjCMessageExpr; // ctor 146 friend class ShuffleVectorExpr; // ctor 147 friend class ParenListExpr; // ctor 148 friend class CXXUnresolvedConstructExpr; // ctor 149 friend class CXXDependentScopeMemberExpr; // ctor 150 friend class OverloadExpr; // ctor 151 unsigned : NumStmtBits; 152 153 unsigned ValueKind : 2; 154 unsigned ObjectKind : 2; 155 unsigned TypeDependent : 1; 156 unsigned ValueDependent : 1; 157 unsigned ContainsUnexpandedParameterPack : 1; 158 }; 159 enum { NumExprBits = 15 }; 160 161 class CastExprBitfields { 162 friend class CastExpr; 163 unsigned : NumExprBits; 164 165 unsigned Kind : 6; 166 unsigned BasePathSize : 32 - 6 - NumExprBits; 167 }; 168 169 class CallExprBitfields { 170 friend class CallExpr; 171 unsigned : NumExprBits; 172 173 unsigned NumPreArgs : 1; 174 }; 175 176 union { 177 // FIXME: this is wasteful on 64-bit platforms. 178 void *Aligner; 179 180 StmtBitfields StmtBits; 181 CompoundStmtBitfields CompoundStmtBits; 182 ExprBitfields ExprBits; 183 CastExprBitfields CastExprBits; 184 CallExprBitfields CallExprBits; 185 }; 186 187 friend class ASTStmtReader; 188 189public: 190 // Only allow allocation of Stmts using the allocator in ASTContext 191 // or by doing a placement new. 192 void* operator new(size_t bytes, ASTContext& C, 193 unsigned alignment = 8) throw() { 194 return ::operator new(bytes, C, alignment); 195 } 196 197 void* operator new(size_t bytes, ASTContext* C, 198 unsigned alignment = 8) throw() { 199 return ::operator new(bytes, *C, alignment); 200 } 201 202 void* operator new(size_t bytes, void* mem) throw() { 203 return mem; 204 } 205 206 void operator delete(void*, ASTContext&, unsigned) throw() { } 207 void operator delete(void*, ASTContext*, unsigned) throw() { } 208 void operator delete(void*, std::size_t) throw() { } 209 void operator delete(void*, void*) throw() { } 210 211public: 212 /// \brief A placeholder type used to construct an empty shell of a 213 /// type, that will be filled in later (e.g., by some 214 /// de-serialization). 215 struct EmptyShell { }; 216 217protected: 218 /// \brief Construct an empty statement. 219 explicit Stmt(StmtClass SC, EmptyShell) { 220 StmtBits.sClass = SC; 221 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 222 } 223 224public: 225 Stmt(StmtClass SC) { 226 StmtBits.sClass = SC; 227 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 228 } 229 230 StmtClass getStmtClass() const { 231 return static_cast<StmtClass>(StmtBits.sClass); 232 } 233 const char *getStmtClassName() const; 234 235 /// SourceLocation tokens are not useful in isolation - they are low level 236 /// value objects created/interpreted by SourceManager. We assume AST 237 /// clients will have a pointer to the respective SourceManager. 238 SourceRange getSourceRange() const; 239 240 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 241 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 242 243 // global temp stats (until we have a per-module visitor) 244 static void addStmtClass(const StmtClass s); 245 static bool CollectingStats(bool Enable = false); 246 static void PrintStats(); 247 248 /// dump - This does a local dump of the specified AST fragment. It dumps the 249 /// specified node and a few nodes underneath it, but not the whole subtree. 250 /// This is useful in a debugger. 251 void dump() const; 252 void dump(SourceManager &SM) const; 253 void dump(llvm::raw_ostream &OS, SourceManager &SM) const; 254 255 /// dumpAll - This does a dump of the specified AST fragment and all subtrees. 256 void dumpAll() const; 257 void dumpAll(SourceManager &SM) const; 258 259 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 260 /// back to its original source language syntax. 261 void dumpPretty(ASTContext& Context) const; 262 void printPretty(llvm::raw_ostream &OS, PrinterHelper *Helper, 263 const PrintingPolicy &Policy, 264 unsigned Indentation = 0) const { 265 printPretty(OS, *(ASTContext*)0, Helper, Policy, Indentation); 266 } 267 void printPretty(llvm::raw_ostream &OS, ASTContext &Context, 268 PrinterHelper *Helper, 269 const PrintingPolicy &Policy, 270 unsigned Indentation = 0) const; 271 272 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 273 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 274 void viewAST() const; 275 276 // Implement isa<T> support. 277 static bool classof(const Stmt *) { return true; } 278 279 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 280 /// contain implicit control-flow in the order their subexpressions 281 /// are evaluated. This predicate returns true if this statement has 282 /// such implicit control-flow. Such statements are also specially handled 283 /// within CFGs. 284 bool hasImplicitControlFlow() const; 285 286 /// Child Iterators: All subclasses must implement 'children' 287 /// to permit easy iteration over the substatements/subexpessions of an 288 /// AST node. This permits easy iteration over all nodes in the AST. 289 typedef StmtIterator child_iterator; 290 typedef ConstStmtIterator const_child_iterator; 291 292 typedef StmtRange child_range; 293 typedef ConstStmtRange const_child_range; 294 295 child_range children(); 296 const_child_range children() const { 297 return const_cast<Stmt*>(this)->children(); 298 } 299 300 child_iterator child_begin() { return children().first; } 301 child_iterator child_end() { return children().second; } 302 303 const_child_iterator child_begin() const { return children().first; } 304 const_child_iterator child_end() const { return children().second; } 305 306 /// \brief Produce a unique representation of the given statement. 307 /// 308 /// \brief ID once the profiling operation is complete, will contain 309 /// the unique representation of the given statement. 310 /// 311 /// \brief Context the AST context in which the statement resides 312 /// 313 /// \brief Canonical whether the profile should be based on the canonical 314 /// representation of this statement (e.g., where non-type template 315 /// parameters are identified by index/level rather than their 316 /// declaration pointers) or the exact representation of the statement as 317 /// written in the source. 318 void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, 319 bool Canonical); 320}; 321 322/// DeclStmt - Adaptor class for mixing declarations with statements and 323/// expressions. For example, CompoundStmt mixes statements, expressions 324/// and declarations (variables, types). Another example is ForStmt, where 325/// the first statement can be an expression or a declaration. 326/// 327class DeclStmt : public Stmt { 328 DeclGroupRef DG; 329 SourceLocation StartLoc, EndLoc; 330 331public: 332 DeclStmt(DeclGroupRef dg, SourceLocation startLoc, 333 SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg), 334 StartLoc(startLoc), EndLoc(endLoc) {} 335 336 /// \brief Build an empty declaration statement. 337 explicit DeclStmt(EmptyShell Empty) : Stmt(DeclStmtClass, Empty) { } 338 339 /// isSingleDecl - This method returns true if this DeclStmt refers 340 /// to a single Decl. 341 bool isSingleDecl() const { 342 return DG.isSingleDecl(); 343 } 344 345 const Decl *getSingleDecl() const { return DG.getSingleDecl(); } 346 Decl *getSingleDecl() { return DG.getSingleDecl(); } 347 348 const DeclGroupRef getDeclGroup() const { return DG; } 349 DeclGroupRef getDeclGroup() { return DG; } 350 void setDeclGroup(DeclGroupRef DGR) { DG = DGR; } 351 352 SourceLocation getStartLoc() const { return StartLoc; } 353 void setStartLoc(SourceLocation L) { StartLoc = L; } 354 SourceLocation getEndLoc() const { return EndLoc; } 355 void setEndLoc(SourceLocation L) { EndLoc = L; } 356 357 SourceRange getSourceRange() const { 358 return SourceRange(StartLoc, EndLoc); 359 } 360 361 static bool classof(const Stmt *T) { 362 return T->getStmtClass() == DeclStmtClass; 363 } 364 static bool classof(const DeclStmt *) { return true; } 365 366 // Iterators over subexpressions. 367 child_range children() { 368 return child_range(child_iterator(DG.begin(), DG.end()), 369 child_iterator(DG.end(), DG.end())); 370 } 371 372 typedef DeclGroupRef::iterator decl_iterator; 373 typedef DeclGroupRef::const_iterator const_decl_iterator; 374 375 decl_iterator decl_begin() { return DG.begin(); } 376 decl_iterator decl_end() { return DG.end(); } 377 const_decl_iterator decl_begin() const { return DG.begin(); } 378 const_decl_iterator decl_end() const { return DG.end(); } 379}; 380 381/// NullStmt - This is the null statement ";": C99 6.8.3p3. 382/// 383class NullStmt : public Stmt { 384 SourceLocation SemiLoc; 385 386 /// \brief Whether the null statement was preceded by an empty macro, e.g: 387 /// @code 388 /// #define CALL(x) 389 /// CALL(0); 390 /// @endcode 391 bool LeadingEmptyMacro; 392public: 393 NullStmt(SourceLocation L, bool LeadingEmptyMacro = false) 394 : Stmt(NullStmtClass), SemiLoc(L), LeadingEmptyMacro(LeadingEmptyMacro) {} 395 396 /// \brief Build an empty null statement. 397 explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty) { } 398 399 SourceLocation getSemiLoc() const { return SemiLoc; } 400 void setSemiLoc(SourceLocation L) { SemiLoc = L; } 401 402 bool hasLeadingEmptyMacro() const { return LeadingEmptyMacro; } 403 404 SourceRange getSourceRange() const { return SourceRange(SemiLoc); } 405 406 static bool classof(const Stmt *T) { 407 return T->getStmtClass() == NullStmtClass; 408 } 409 static bool classof(const NullStmt *) { return true; } 410 411 child_range children() { return child_range(); } 412 413 friend class ASTStmtReader; 414 friend class ASTStmtWriter; 415}; 416 417/// CompoundStmt - This represents a group of statements like { stmt stmt }. 418/// 419class CompoundStmt : public Stmt { 420 Stmt** Body; 421 SourceLocation LBracLoc, RBracLoc; 422public: 423 CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned NumStmts, 424 SourceLocation LB, SourceLocation RB) 425 : Stmt(CompoundStmtClass), LBracLoc(LB), RBracLoc(RB) { 426 CompoundStmtBits.NumStmts = NumStmts; 427 428 if (NumStmts == 0) { 429 Body = 0; 430 return; 431 } 432 433 Body = new (C) Stmt*[NumStmts]; 434 memcpy(Body, StmtStart, NumStmts * sizeof(*Body)); 435 } 436 437 // \brief Build an empty compound statement. 438 explicit CompoundStmt(EmptyShell Empty) 439 : Stmt(CompoundStmtClass, Empty), Body(0) { 440 CompoundStmtBits.NumStmts = 0; 441 } 442 443 void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts); 444 445 bool body_empty() const { return CompoundStmtBits.NumStmts == 0; } 446 unsigned size() const { return CompoundStmtBits.NumStmts; } 447 448 typedef Stmt** body_iterator; 449 body_iterator body_begin() { return Body; } 450 body_iterator body_end() { return Body + size(); } 451 Stmt *body_back() { return !body_empty() ? Body[size()-1] : 0; } 452 453 void setLastStmt(Stmt *S) { 454 assert(!body_empty() && "setLastStmt"); 455 Body[size()-1] = S; 456 } 457 458 typedef Stmt* const * const_body_iterator; 459 const_body_iterator body_begin() const { return Body; } 460 const_body_iterator body_end() const { return Body + size(); } 461 const Stmt *body_back() const { return !body_empty() ? Body[size()-1] : 0; } 462 463 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 464 reverse_body_iterator body_rbegin() { 465 return reverse_body_iterator(body_end()); 466 } 467 reverse_body_iterator body_rend() { 468 return reverse_body_iterator(body_begin()); 469 } 470 471 typedef std::reverse_iterator<const_body_iterator> 472 const_reverse_body_iterator; 473 474 const_reverse_body_iterator body_rbegin() const { 475 return const_reverse_body_iterator(body_end()); 476 } 477 478 const_reverse_body_iterator body_rend() const { 479 return const_reverse_body_iterator(body_begin()); 480 } 481 482 SourceRange getSourceRange() const { 483 return SourceRange(LBracLoc, RBracLoc); 484 } 485 486 SourceLocation getLBracLoc() const { return LBracLoc; } 487 void setLBracLoc(SourceLocation L) { LBracLoc = L; } 488 SourceLocation getRBracLoc() const { return RBracLoc; } 489 void setRBracLoc(SourceLocation L) { RBracLoc = L; } 490 491 static bool classof(const Stmt *T) { 492 return T->getStmtClass() == CompoundStmtClass; 493 } 494 static bool classof(const CompoundStmt *) { return true; } 495 496 // Iterators 497 child_range children() { 498 return child_range(&Body[0], &Body[0]+CompoundStmtBits.NumStmts); 499 } 500}; 501 502// SwitchCase is the base class for CaseStmt and DefaultStmt, 503class SwitchCase : public Stmt { 504protected: 505 // A pointer to the following CaseStmt or DefaultStmt class, 506 // used by SwitchStmt. 507 SwitchCase *NextSwitchCase; 508 509 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 510 511public: 512 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 513 514 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 515 516 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 517 518 Stmt *getSubStmt(); 519 const Stmt *getSubStmt() const { 520 return const_cast<SwitchCase*>(this)->getSubStmt(); 521 } 522 523 SourceRange getSourceRange() const { return SourceRange(); } 524 525 static bool classof(const Stmt *T) { 526 return T->getStmtClass() == CaseStmtClass || 527 T->getStmtClass() == DefaultStmtClass; 528 } 529 static bool classof(const SwitchCase *) { return true; } 530}; 531 532class CaseStmt : public SwitchCase { 533 enum { LHS, RHS, SUBSTMT, END_EXPR }; 534 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 535 // GNU "case 1 ... 4" extension 536 SourceLocation CaseLoc; 537 SourceLocation EllipsisLoc; 538 SourceLocation ColonLoc; 539public: 540 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc, 541 SourceLocation ellipsisLoc, SourceLocation colonLoc) 542 : SwitchCase(CaseStmtClass) { 543 SubExprs[SUBSTMT] = 0; 544 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 545 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 546 CaseLoc = caseLoc; 547 EllipsisLoc = ellipsisLoc; 548 ColonLoc = colonLoc; 549 } 550 551 /// \brief Build an empty switch case statement. 552 explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { } 553 554 SourceLocation getCaseLoc() const { return CaseLoc; } 555 void setCaseLoc(SourceLocation L) { CaseLoc = L; } 556 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 557 void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; } 558 SourceLocation getColonLoc() const { return ColonLoc; } 559 void setColonLoc(SourceLocation L) { ColonLoc = L; } 560 561 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 562 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 563 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 564 565 const Expr *getLHS() const { 566 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 567 } 568 const Expr *getRHS() const { 569 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 570 } 571 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 572 573 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 574 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 575 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 576 577 578 SourceRange getSourceRange() const { 579 // Handle deeply nested case statements with iteration instead of recursion. 580 const CaseStmt *CS = this; 581 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 582 CS = CS2; 583 584 return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd()); 585 } 586 static bool classof(const Stmt *T) { 587 return T->getStmtClass() == CaseStmtClass; 588 } 589 static bool classof(const CaseStmt *) { return true; } 590 591 // Iterators 592 child_range children() { 593 return child_range(&SubExprs[0], &SubExprs[END_EXPR]); 594 } 595}; 596 597class DefaultStmt : public SwitchCase { 598 Stmt* SubStmt; 599 SourceLocation DefaultLoc; 600 SourceLocation ColonLoc; 601public: 602 DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) : 603 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL), 604 ColonLoc(CL) {} 605 606 /// \brief Build an empty default statement. 607 explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { } 608 609 Stmt *getSubStmt() { return SubStmt; } 610 const Stmt *getSubStmt() const { return SubStmt; } 611 void setSubStmt(Stmt *S) { SubStmt = S; } 612 613 SourceLocation getDefaultLoc() const { return DefaultLoc; } 614 void setDefaultLoc(SourceLocation L) { DefaultLoc = L; } 615 SourceLocation getColonLoc() const { return ColonLoc; } 616 void setColonLoc(SourceLocation L) { ColonLoc = L; } 617 618 SourceRange getSourceRange() const { 619 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 620 } 621 static bool classof(const Stmt *T) { 622 return T->getStmtClass() == DefaultStmtClass; 623 } 624 static bool classof(const DefaultStmt *) { return true; } 625 626 // Iterators 627 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 628}; 629 630 631/// LabelStmt - Represents a label, which has a substatement. For example: 632/// foo: return; 633/// 634class LabelStmt : public Stmt { 635 LabelDecl *TheDecl; 636 Stmt *SubStmt; 637 SourceLocation IdentLoc; 638public: 639 LabelStmt(SourceLocation IL, LabelDecl *D, Stmt *substmt) 640 : Stmt(LabelStmtClass), TheDecl(D), SubStmt(substmt), IdentLoc(IL) { 641 } 642 643 // \brief Build an empty label statement. 644 explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { } 645 646 SourceLocation getIdentLoc() const { return IdentLoc; } 647 LabelDecl *getDecl() const { return TheDecl; } 648 void setDecl(LabelDecl *D) { TheDecl = D; } 649 const char *getName() const; 650 Stmt *getSubStmt() { return SubStmt; } 651 const Stmt *getSubStmt() const { return SubStmt; } 652 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 653 void setSubStmt(Stmt *SS) { SubStmt = SS; } 654 655 SourceRange getSourceRange() const { 656 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 657 } 658 child_range children() { return child_range(&SubStmt, &SubStmt+1); } 659 660 static bool classof(const Stmt *T) { 661 return T->getStmtClass() == LabelStmtClass; 662 } 663 static bool classof(const LabelStmt *) { return true; } 664}; 665 666 667/// IfStmt - This represents an if/then/else. 668/// 669class IfStmt : public Stmt { 670 enum { VAR, COND, THEN, ELSE, END_EXPR }; 671 Stmt* SubExprs[END_EXPR]; 672 673 SourceLocation IfLoc; 674 SourceLocation ElseLoc; 675 676public: 677 IfStmt(ASTContext &C, SourceLocation IL, VarDecl *var, Expr *cond, 678 Stmt *then, SourceLocation EL = SourceLocation(), Stmt *elsev = 0); 679 680 /// \brief Build an empty if/then/else statement 681 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 682 683 /// \brief Retrieve the variable declared in this "if" statement, if any. 684 /// 685 /// In the following example, "x" is the condition variable. 686 /// \code 687 /// if (int x = foo()) { 688 /// printf("x is %d", x); 689 /// } 690 /// \endcode 691 VarDecl *getConditionVariable() const; 692 void setConditionVariable(ASTContext &C, VarDecl *V); 693 694 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 695 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 696 const Stmt *getThen() const { return SubExprs[THEN]; } 697 void setThen(Stmt *S) { SubExprs[THEN] = S; } 698 const Stmt *getElse() const { return SubExprs[ELSE]; } 699 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 700 701 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 702 Stmt *getThen() { return SubExprs[THEN]; } 703 Stmt *getElse() { return SubExprs[ELSE]; } 704 705 SourceLocation getIfLoc() const { return IfLoc; } 706 void setIfLoc(SourceLocation L) { IfLoc = L; } 707 SourceLocation getElseLoc() const { return ElseLoc; } 708 void setElseLoc(SourceLocation L) { ElseLoc = L; } 709 710 SourceRange getSourceRange() const { 711 if (SubExprs[ELSE]) 712 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 713 else 714 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 715 } 716 717 // Iterators over subexpressions. The iterators will include iterating 718 // over the initialization expression referenced by the condition variable. 719 child_range children() { 720 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 721 } 722 723 static bool classof(const Stmt *T) { 724 return T->getStmtClass() == IfStmtClass; 725 } 726 static bool classof(const IfStmt *) { return true; } 727}; 728 729/// SwitchStmt - This represents a 'switch' stmt. 730/// 731class SwitchStmt : public Stmt { 732 enum { VAR, COND, BODY, END_EXPR }; 733 Stmt* SubExprs[END_EXPR]; 734 // This points to a linked list of case and default statements. 735 SwitchCase *FirstCase; 736 SourceLocation SwitchLoc; 737 738 /// If the SwitchStmt is a switch on an enum value, this records whether 739 /// all the enum values were covered by CaseStmts. This value is meant to 740 /// be a hint for possible clients. 741 unsigned AllEnumCasesCovered : 1; 742 743public: 744 SwitchStmt(ASTContext &C, VarDecl *Var, Expr *cond); 745 746 /// \brief Build a empty switch statement. 747 explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { } 748 749 /// \brief Retrieve the variable declared in this "switch" statement, if any. 750 /// 751 /// In the following example, "x" is the condition variable. 752 /// \code 753 /// switch (int x = foo()) { 754 /// case 0: break; 755 /// // ... 756 /// } 757 /// \endcode 758 VarDecl *getConditionVariable() const; 759 void setConditionVariable(ASTContext &C, VarDecl *V); 760 761 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 762 const Stmt *getBody() const { return SubExprs[BODY]; } 763 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 764 765 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 766 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 767 Stmt *getBody() { return SubExprs[BODY]; } 768 void setBody(Stmt *S) { SubExprs[BODY] = S; } 769 SwitchCase *getSwitchCaseList() { return FirstCase; } 770 771 /// \brief Set the case list for this switch statement. 772 /// 773 /// The caller is responsible for incrementing the retain counts on 774 /// all of the SwitchCase statements in this list. 775 void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; } 776 777 SourceLocation getSwitchLoc() const { return SwitchLoc; } 778 void setSwitchLoc(SourceLocation L) { SwitchLoc = L; } 779 780 void setBody(Stmt *S, SourceLocation SL) { 781 SubExprs[BODY] = S; 782 SwitchLoc = SL; 783 } 784 void addSwitchCase(SwitchCase *SC) { 785 assert(!SC->getNextSwitchCase() && "case/default already added to a switch"); 786 SC->setNextSwitchCase(FirstCase); 787 FirstCase = SC; 788 } 789 790 /// Set a flag in the SwitchStmt indicating that if the 'switch (X)' is a 791 /// switch over an enum value then all cases have been explicitly covered. 792 void setAllEnumCasesCovered() { 793 AllEnumCasesCovered = 1; 794 } 795 796 /// Returns true if the SwitchStmt is a switch of an enum value and all cases 797 /// have been explicitly covered. 798 bool isAllEnumCasesCovered() const { 799 return (bool) AllEnumCasesCovered; 800 } 801 802 SourceRange getSourceRange() const { 803 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 804 } 805 // Iterators 806 child_range children() { 807 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 808 } 809 810 static bool classof(const Stmt *T) { 811 return T->getStmtClass() == SwitchStmtClass; 812 } 813 static bool classof(const SwitchStmt *) { return true; } 814}; 815 816 817/// WhileStmt - This represents a 'while' stmt. 818/// 819class WhileStmt : public Stmt { 820 enum { VAR, COND, BODY, END_EXPR }; 821 Stmt* SubExprs[END_EXPR]; 822 SourceLocation WhileLoc; 823public: 824 WhileStmt(ASTContext &C, VarDecl *Var, Expr *cond, Stmt *body, 825 SourceLocation WL); 826 827 /// \brief Build an empty while statement. 828 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 829 830 /// \brief Retrieve the variable declared in this "while" statement, if any. 831 /// 832 /// In the following example, "x" is the condition variable. 833 /// \code 834 /// while (int x = random()) { 835 /// // ... 836 /// } 837 /// \endcode 838 VarDecl *getConditionVariable() const; 839 void setConditionVariable(ASTContext &C, VarDecl *V); 840 841 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 842 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 843 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 844 Stmt *getBody() { return SubExprs[BODY]; } 845 const Stmt *getBody() const { return SubExprs[BODY]; } 846 void setBody(Stmt *S) { SubExprs[BODY] = S; } 847 848 SourceLocation getWhileLoc() const { return WhileLoc; } 849 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 850 851 SourceRange getSourceRange() const { 852 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 853 } 854 static bool classof(const Stmt *T) { 855 return T->getStmtClass() == WhileStmtClass; 856 } 857 static bool classof(const WhileStmt *) { return true; } 858 859 // Iterators 860 child_range children() { 861 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 862 } 863}; 864 865/// DoStmt - This represents a 'do/while' stmt. 866/// 867class DoStmt : public Stmt { 868 enum { BODY, COND, END_EXPR }; 869 Stmt* SubExprs[END_EXPR]; 870 SourceLocation DoLoc; 871 SourceLocation WhileLoc; 872 SourceLocation RParenLoc; // Location of final ')' in do stmt condition. 873 874public: 875 DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL, 876 SourceLocation RP) 877 : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) { 878 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 879 SubExprs[BODY] = body; 880 } 881 882 /// \brief Build an empty do-while statement. 883 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 884 885 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 886 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 887 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 888 Stmt *getBody() { return SubExprs[BODY]; } 889 const Stmt *getBody() const { return SubExprs[BODY]; } 890 void setBody(Stmt *S) { SubExprs[BODY] = S; } 891 892 SourceLocation getDoLoc() const { return DoLoc; } 893 void setDoLoc(SourceLocation L) { DoLoc = L; } 894 SourceLocation getWhileLoc() const { return WhileLoc; } 895 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 896 897 SourceLocation getRParenLoc() const { return RParenLoc; } 898 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 899 900 SourceRange getSourceRange() const { 901 return SourceRange(DoLoc, RParenLoc); 902 } 903 static bool classof(const Stmt *T) { 904 return T->getStmtClass() == DoStmtClass; 905 } 906 static bool classof(const DoStmt *) { return true; } 907 908 // Iterators 909 child_range children() { 910 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 911 } 912}; 913 914 915/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 916/// the init/cond/inc parts of the ForStmt will be null if they were not 917/// specified in the source. 918/// 919class ForStmt : public Stmt { 920 enum { INIT, CONDVAR, COND, INC, BODY, END_EXPR }; 921 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 922 SourceLocation ForLoc; 923 SourceLocation LParenLoc, RParenLoc; 924 925public: 926 ForStmt(ASTContext &C, Stmt *Init, Expr *Cond, VarDecl *condVar, Expr *Inc, 927 Stmt *Body, SourceLocation FL, SourceLocation LP, SourceLocation RP); 928 929 /// \brief Build an empty for statement. 930 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 931 932 Stmt *getInit() { return SubExprs[INIT]; } 933 934 /// \brief Retrieve the variable declared in this "for" statement, if any. 935 /// 936 /// In the following example, "y" is the condition variable. 937 /// \code 938 /// for (int x = random(); int y = mangle(x); ++x) { 939 /// // ... 940 /// } 941 /// \endcode 942 VarDecl *getConditionVariable() const; 943 void setConditionVariable(ASTContext &C, VarDecl *V); 944 945 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 946 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 947 Stmt *getBody() { return SubExprs[BODY]; } 948 949 const Stmt *getInit() const { return SubExprs[INIT]; } 950 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 951 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 952 const Stmt *getBody() const { return SubExprs[BODY]; } 953 954 void setInit(Stmt *S) { SubExprs[INIT] = S; } 955 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 956 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 957 void setBody(Stmt *S) { SubExprs[BODY] = S; } 958 959 SourceLocation getForLoc() const { return ForLoc; } 960 void setForLoc(SourceLocation L) { ForLoc = L; } 961 SourceLocation getLParenLoc() const { return LParenLoc; } 962 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 963 SourceLocation getRParenLoc() const { return RParenLoc; } 964 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 965 966 SourceRange getSourceRange() const { 967 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 968 } 969 static bool classof(const Stmt *T) { 970 return T->getStmtClass() == ForStmtClass; 971 } 972 static bool classof(const ForStmt *) { return true; } 973 974 // Iterators 975 child_range children() { 976 return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR); 977 } 978}; 979 980/// GotoStmt - This represents a direct goto. 981/// 982class GotoStmt : public Stmt { 983 LabelDecl *Label; 984 SourceLocation GotoLoc; 985 SourceLocation LabelLoc; 986public: 987 GotoStmt(LabelDecl *label, SourceLocation GL, SourceLocation LL) 988 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 989 990 /// \brief Build an empty goto statement. 991 explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { } 992 993 LabelDecl *getLabel() const { return Label; } 994 void setLabel(LabelDecl *D) { Label = D; } 995 996 SourceLocation getGotoLoc() const { return GotoLoc; } 997 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 998 SourceLocation getLabelLoc() const { return LabelLoc; } 999 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 1000 1001 SourceRange getSourceRange() const { 1002 return SourceRange(GotoLoc, LabelLoc); 1003 } 1004 static bool classof(const Stmt *T) { 1005 return T->getStmtClass() == GotoStmtClass; 1006 } 1007 static bool classof(const GotoStmt *) { return true; } 1008 1009 // Iterators 1010 child_range children() { return child_range(); } 1011}; 1012 1013/// IndirectGotoStmt - This represents an indirect goto. 1014/// 1015class IndirectGotoStmt : public Stmt { 1016 SourceLocation GotoLoc; 1017 SourceLocation StarLoc; 1018 Stmt *Target; 1019public: 1020 IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc, 1021 Expr *target) 1022 : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc), 1023 Target((Stmt*)target) {} 1024 1025 /// \brief Build an empty indirect goto statement. 1026 explicit IndirectGotoStmt(EmptyShell Empty) 1027 : Stmt(IndirectGotoStmtClass, Empty) { } 1028 1029 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 1030 SourceLocation getGotoLoc() const { return GotoLoc; } 1031 void setStarLoc(SourceLocation L) { StarLoc = L; } 1032 SourceLocation getStarLoc() const { return StarLoc; } 1033 1034 Expr *getTarget() { return reinterpret_cast<Expr*>(Target); } 1035 const Expr *getTarget() const {return reinterpret_cast<const Expr*>(Target);} 1036 void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); } 1037 1038 /// getConstantTarget - Returns the fixed target of this indirect 1039 /// goto, if one exists. 1040 LabelDecl *getConstantTarget(); 1041 const LabelDecl *getConstantTarget() const { 1042 return const_cast<IndirectGotoStmt*>(this)->getConstantTarget(); 1043 } 1044 1045 SourceRange getSourceRange() const { 1046 return SourceRange(GotoLoc, Target->getLocEnd()); 1047 } 1048 1049 static bool classof(const Stmt *T) { 1050 return T->getStmtClass() == IndirectGotoStmtClass; 1051 } 1052 static bool classof(const IndirectGotoStmt *) { return true; } 1053 1054 // Iterators 1055 child_range children() { return child_range(&Target, &Target+1); } 1056}; 1057 1058 1059/// ContinueStmt - This represents a continue. 1060/// 1061class ContinueStmt : public Stmt { 1062 SourceLocation ContinueLoc; 1063public: 1064 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 1065 1066 /// \brief Build an empty continue statement. 1067 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 1068 1069 SourceLocation getContinueLoc() const { return ContinueLoc; } 1070 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 1071 1072 SourceRange getSourceRange() const { 1073 return SourceRange(ContinueLoc); 1074 } 1075 1076 static bool classof(const Stmt *T) { 1077 return T->getStmtClass() == ContinueStmtClass; 1078 } 1079 static bool classof(const ContinueStmt *) { return true; } 1080 1081 // Iterators 1082 child_range children() { return child_range(); } 1083}; 1084 1085/// BreakStmt - This represents a break. 1086/// 1087class BreakStmt : public Stmt { 1088 SourceLocation BreakLoc; 1089public: 1090 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 1091 1092 /// \brief Build an empty break statement. 1093 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 1094 1095 SourceLocation getBreakLoc() const { return BreakLoc; } 1096 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 1097 1098 SourceRange getSourceRange() const { return SourceRange(BreakLoc); } 1099 1100 static bool classof(const Stmt *T) { 1101 return T->getStmtClass() == BreakStmtClass; 1102 } 1103 static bool classof(const BreakStmt *) { return true; } 1104 1105 // Iterators 1106 child_range children() { return child_range(); } 1107}; 1108 1109 1110/// ReturnStmt - This represents a return, optionally of an expression: 1111/// return; 1112/// return 4; 1113/// 1114/// Note that GCC allows return with no argument in a function declared to 1115/// return a value, and it allows returning a value in functions declared to 1116/// return void. We explicitly model this in the AST, which means you can't 1117/// depend on the return type of the function and the presence of an argument. 1118/// 1119class ReturnStmt : public Stmt { 1120 Stmt *RetExpr; 1121 SourceLocation RetLoc; 1122 const VarDecl *NRVOCandidate; 1123 1124public: 1125 ReturnStmt(SourceLocation RL) 1126 : Stmt(ReturnStmtClass), RetExpr(0), RetLoc(RL), NRVOCandidate(0) { } 1127 1128 ReturnStmt(SourceLocation RL, Expr *E, const VarDecl *NRVOCandidate) 1129 : Stmt(ReturnStmtClass), RetExpr((Stmt*) E), RetLoc(RL), 1130 NRVOCandidate(NRVOCandidate) {} 1131 1132 /// \brief Build an empty return expression. 1133 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 1134 1135 const Expr *getRetValue() const; 1136 Expr *getRetValue(); 1137 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 1138 1139 SourceLocation getReturnLoc() const { return RetLoc; } 1140 void setReturnLoc(SourceLocation L) { RetLoc = L; } 1141 1142 /// \brief Retrieve the variable that might be used for the named return 1143 /// value optimization. 1144 /// 1145 /// The optimization itself can only be performed if the variable is 1146 /// also marked as an NRVO object. 1147 const VarDecl *getNRVOCandidate() const { return NRVOCandidate; } 1148 void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; } 1149 1150 SourceRange getSourceRange() const; 1151 1152 static bool classof(const Stmt *T) { 1153 return T->getStmtClass() == ReturnStmtClass; 1154 } 1155 static bool classof(const ReturnStmt *) { return true; } 1156 1157 // Iterators 1158 child_range children() { 1159 if (RetExpr) return child_range(&RetExpr, &RetExpr+1); 1160 return child_range(); 1161 } 1162}; 1163 1164/// AsmStmt - This represents a GNU inline-assembly statement extension. 1165/// 1166class AsmStmt : public Stmt { 1167 SourceLocation AsmLoc, RParenLoc; 1168 StringLiteral *AsmStr; 1169 1170 bool IsSimple; 1171 bool IsVolatile; 1172 bool MSAsm; 1173 1174 unsigned NumOutputs; 1175 unsigned NumInputs; 1176 unsigned NumClobbers; 1177 1178 // FIXME: If we wanted to, we could allocate all of these in one big array. 1179 IdentifierInfo **Names; 1180 StringLiteral **Constraints; 1181 Stmt **Exprs; 1182 StringLiteral **Clobbers; 1183 1184public: 1185 AsmStmt(ASTContext &C, SourceLocation asmloc, bool issimple, bool isvolatile, 1186 bool msasm, unsigned numoutputs, unsigned numinputs, 1187 IdentifierInfo **names, StringLiteral **constraints, 1188 Expr **exprs, StringLiteral *asmstr, unsigned numclobbers, 1189 StringLiteral **clobbers, SourceLocation rparenloc); 1190 1191 /// \brief Build an empty inline-assembly statement. 1192 explicit AsmStmt(EmptyShell Empty) : Stmt(AsmStmtClass, Empty), 1193 Names(0), Constraints(0), Exprs(0), Clobbers(0) { } 1194 1195 SourceLocation getAsmLoc() const { return AsmLoc; } 1196 void setAsmLoc(SourceLocation L) { AsmLoc = L; } 1197 SourceLocation getRParenLoc() const { return RParenLoc; } 1198 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1199 1200 bool isVolatile() const { return IsVolatile; } 1201 void setVolatile(bool V) { IsVolatile = V; } 1202 bool isSimple() const { return IsSimple; } 1203 void setSimple(bool V) { IsSimple = V; } 1204 bool isMSAsm() const { return MSAsm; } 1205 void setMSAsm(bool V) { MSAsm = V; } 1206 1207 //===--- Asm String Analysis ---===// 1208 1209 const StringLiteral *getAsmString() const { return AsmStr; } 1210 StringLiteral *getAsmString() { return AsmStr; } 1211 void setAsmString(StringLiteral *E) { AsmStr = E; } 1212 1213 /// AsmStringPiece - this is part of a decomposed asm string specification 1214 /// (for use with the AnalyzeAsmString function below). An asm string is 1215 /// considered to be a concatenation of these parts. 1216 class AsmStringPiece { 1217 public: 1218 enum Kind { 1219 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1220 Operand // Operand reference, with optional modifier %c4. 1221 }; 1222 private: 1223 Kind MyKind; 1224 std::string Str; 1225 unsigned OperandNo; 1226 public: 1227 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1228 AsmStringPiece(unsigned OpNo, char Modifier) 1229 : MyKind(Operand), Str(), OperandNo(OpNo) { 1230 Str += Modifier; 1231 } 1232 1233 bool isString() const { return MyKind == String; } 1234 bool isOperand() const { return MyKind == Operand; } 1235 1236 const std::string &getString() const { 1237 assert(isString()); 1238 return Str; 1239 } 1240 1241 unsigned getOperandNo() const { 1242 assert(isOperand()); 1243 return OperandNo; 1244 } 1245 1246 /// getModifier - Get the modifier for this operand, if present. This 1247 /// returns '\0' if there was no modifier. 1248 char getModifier() const { 1249 assert(isOperand()); 1250 return Str[0]; 1251 } 1252 }; 1253 1254 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1255 /// it into pieces. If the asm string is erroneous, emit errors and return 1256 /// true, otherwise return false. This handles canonicalization and 1257 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1258 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1259 unsigned AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece> &Pieces, 1260 ASTContext &C, unsigned &DiagOffs) const; 1261 1262 1263 //===--- Output operands ---===// 1264 1265 unsigned getNumOutputs() const { return NumOutputs; } 1266 1267 IdentifierInfo *getOutputIdentifier(unsigned i) const { 1268 return Names[i]; 1269 } 1270 1271 llvm::StringRef getOutputName(unsigned i) const { 1272 if (IdentifierInfo *II = getOutputIdentifier(i)) 1273 return II->getName(); 1274 1275 return llvm::StringRef(); 1276 } 1277 1278 /// getOutputConstraint - Return the constraint string for the specified 1279 /// output operand. All output constraints are known to be non-empty (either 1280 /// '=' or '+'). 1281 llvm::StringRef getOutputConstraint(unsigned i) const; 1282 1283 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1284 return Constraints[i]; 1285 } 1286 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1287 return Constraints[i]; 1288 } 1289 1290 Expr *getOutputExpr(unsigned i); 1291 1292 const Expr *getOutputExpr(unsigned i) const { 1293 return const_cast<AsmStmt*>(this)->getOutputExpr(i); 1294 } 1295 1296 /// isOutputPlusConstraint - Return true if the specified output constraint 1297 /// is a "+" constraint (which is both an input and an output) or false if it 1298 /// is an "=" constraint (just an output). 1299 bool isOutputPlusConstraint(unsigned i) const { 1300 return getOutputConstraint(i)[0] == '+'; 1301 } 1302 1303 /// getNumPlusOperands - Return the number of output operands that have a "+" 1304 /// constraint. 1305 unsigned getNumPlusOperands() const; 1306 1307 //===--- Input operands ---===// 1308 1309 unsigned getNumInputs() const { return NumInputs; } 1310 1311 IdentifierInfo *getInputIdentifier(unsigned i) const { 1312 return Names[i + NumOutputs]; 1313 } 1314 1315 llvm::StringRef getInputName(unsigned i) const { 1316 if (IdentifierInfo *II = getInputIdentifier(i)) 1317 return II->getName(); 1318 1319 return llvm::StringRef(); 1320 } 1321 1322 /// getInputConstraint - Return the specified input constraint. Unlike output 1323 /// constraints, these can be empty. 1324 llvm::StringRef getInputConstraint(unsigned i) const; 1325 1326 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1327 return Constraints[i + NumOutputs]; 1328 } 1329 StringLiteral *getInputConstraintLiteral(unsigned i) { 1330 return Constraints[i + NumOutputs]; 1331 } 1332 1333 Expr *getInputExpr(unsigned i); 1334 void setInputExpr(unsigned i, Expr *E); 1335 1336 const Expr *getInputExpr(unsigned i) const { 1337 return const_cast<AsmStmt*>(this)->getInputExpr(i); 1338 } 1339 1340 void setOutputsAndInputsAndClobbers(ASTContext &C, 1341 IdentifierInfo **Names, 1342 StringLiteral **Constraints, 1343 Stmt **Exprs, 1344 unsigned NumOutputs, 1345 unsigned NumInputs, 1346 StringLiteral **Clobbers, 1347 unsigned NumClobbers); 1348 1349 //===--- Other ---===// 1350 1351 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1352 /// translate this into a numeric value needed to reference the same operand. 1353 /// This returns -1 if the operand name is invalid. 1354 int getNamedOperand(llvm::StringRef SymbolicName) const; 1355 1356 unsigned getNumClobbers() const { return NumClobbers; } 1357 StringLiteral *getClobber(unsigned i) { return Clobbers[i]; } 1358 const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; } 1359 1360 SourceRange getSourceRange() const { 1361 return SourceRange(AsmLoc, RParenLoc); 1362 } 1363 1364 static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;} 1365 static bool classof(const AsmStmt *) { return true; } 1366 1367 // Input expr iterators. 1368 1369 typedef ExprIterator inputs_iterator; 1370 typedef ConstExprIterator const_inputs_iterator; 1371 1372 inputs_iterator begin_inputs() { 1373 return &Exprs[0] + NumOutputs; 1374 } 1375 1376 inputs_iterator end_inputs() { 1377 return &Exprs[0] + NumOutputs + NumInputs; 1378 } 1379 1380 const_inputs_iterator begin_inputs() const { 1381 return &Exprs[0] + NumOutputs; 1382 } 1383 1384 const_inputs_iterator end_inputs() const { 1385 return &Exprs[0] + NumOutputs + NumInputs; 1386 } 1387 1388 // Output expr iterators. 1389 1390 typedef ExprIterator outputs_iterator; 1391 typedef ConstExprIterator const_outputs_iterator; 1392 1393 outputs_iterator begin_outputs() { 1394 return &Exprs[0]; 1395 } 1396 outputs_iterator end_outputs() { 1397 return &Exprs[0] + NumOutputs; 1398 } 1399 1400 const_outputs_iterator begin_outputs() const { 1401 return &Exprs[0]; 1402 } 1403 const_outputs_iterator end_outputs() const { 1404 return &Exprs[0] + NumOutputs; 1405 } 1406 1407 child_range children() { 1408 return child_range(&Exprs[0], &Exprs[0] + NumOutputs + NumInputs); 1409 } 1410}; 1411 1412} // end namespace clang 1413 1414#endif 1415