Stmt.h revision 8cfe5a784133d90bf329fd20801824a6f71bb8ca
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 Stmt* const * I; 73 public: 74 ConstExprIterator(Stmt* const* i) : I(i) {} 75 ConstExprIterator() : I(0) {} 76 ConstExprIterator& operator++() { ++I; return *this; } 77 ConstExprIterator operator+(size_t i) { return I+i; } 78 ConstExprIterator operator-(size_t i) { 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 FIRST_STMT(CLASS) firstStmtConstant = CLASS##Class, 101#define LAST_STMT(CLASS) lastStmtConstant = CLASS##Class, 102#define FIRST_EXPR(CLASS) firstExprConstant = CLASS##Class, 103#define LAST_EXPR(CLASS) lastExprConstant = CLASS##Class 104#include "clang/AST/StmtNodes.def" 105}; 106private: 107 /// \brief The statement class. 108 const unsigned sClass : 8; 109 110 /// \brief The reference count for this statement. 111 unsigned RefCount : 24; 112 113 // Make vanilla 'new' and 'delete' illegal for Stmts. 114protected: 115 void* operator new(size_t bytes) throw() { 116 assert(0 && "Stmts cannot be allocated with regular 'new'."); 117 return 0; 118 } 119 void operator delete(void* data) throw() { 120 assert(0 && "Stmts cannot be released with regular 'delete'."); 121 } 122 123public: 124 // Only allow allocation of Stmts using the allocator in ASTContext 125 // or by doing a placement new. 126 void* operator new(size_t bytes, ASTContext& C, 127 unsigned alignment = 16) throw() { 128 return ::operator new(bytes, C, alignment); 129 } 130 131 void* operator new(size_t bytes, ASTContext* C, 132 unsigned alignment = 16) throw() { 133 return ::operator new(bytes, *C, alignment); 134 } 135 136 void* operator new(size_t bytes, void* mem) throw() { 137 return mem; 138 } 139 140 void operator delete(void*, ASTContext&, unsigned) throw() { } 141 void operator delete(void*, ASTContext*, unsigned) throw() { } 142 void operator delete(void*, std::size_t) throw() { } 143 void operator delete(void*, void*) throw() { } 144 145public: 146 /// \brief A placeholder type used to construct an empty shell of a 147 /// type, that will be filled in later (e.g., by some 148 /// de-serialization). 149 struct EmptyShell { }; 150 151protected: 152 /// DestroyChildren - Invoked by destructors of subclasses of Stmt to 153 /// recursively release child AST nodes. 154 void DestroyChildren(ASTContext& Ctx); 155 156 /// \brief Construct an empty statement. 157 explicit Stmt(StmtClass SC, EmptyShell) : sClass(SC), RefCount(1) { 158 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 159 } 160 161 /// \brief Virtual method that performs the actual destruction of 162 /// this statement. 163 /// 164 /// Subclasses should override this method (not Destroy()) to 165 /// provide class-specific destruction. 166 virtual void DoDestroy(ASTContext &Ctx); 167 168public: 169 Stmt(StmtClass SC) : sClass(SC), RefCount(1) { 170 if (Stmt::CollectingStats()) Stmt::addStmtClass(SC); 171 } 172 virtual ~Stmt() {} 173 174 /// \brief Destroy the current statement and its children. 175 void Destroy(ASTContext &Ctx) { 176 assert(RefCount >= 1); 177 if (--RefCount == 0) 178 DoDestroy(Ctx); 179 } 180 181 /// \brief Increases the reference count for this statement. 182 /// 183 /// Invoke the Retain() operation when this statement or expression 184 /// is being shared by another owner. 185 Stmt *Retain() { 186 assert(RefCount >= 1); 187 ++RefCount; 188 return this; 189 } 190 191 StmtClass getStmtClass() const { 192 assert(RefCount >= 1 && "Referencing already-destroyed statement!"); 193 return (StmtClass)sClass; 194 } 195 const char *getStmtClassName() const; 196 197 /// SourceLocation tokens are not useful in isolation - they are low level 198 /// value objects created/interpreted by SourceManager. We assume AST 199 /// clients will have a pointer to the respective SourceManager. 200 virtual SourceRange getSourceRange() const = 0; 201 SourceLocation getLocStart() const { return getSourceRange().getBegin(); } 202 SourceLocation getLocEnd() const { return getSourceRange().getEnd(); } 203 204 // global temp stats (until we have a per-module visitor) 205 static void addStmtClass(const StmtClass s); 206 static bool CollectingStats(bool enable=false); 207 static void PrintStats(); 208 209 /// dump - This does a local dump of the specified AST fragment. It dumps the 210 /// specified node and a few nodes underneath it, but not the whole subtree. 211 /// This is useful in a debugger. 212 void dump() const; 213 void dump(SourceManager &SM) const; 214 215 /// dumpAll - This does a dump of the specified AST fragment and all subtrees. 216 void dumpAll() const; 217 void dumpAll(SourceManager &SM) const; 218 219 /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST 220 /// back to its original source language syntax. 221 void dumpPretty(ASTContext& Context) const; 222 void printPretty(llvm::raw_ostream &OS, PrinterHelper *Helper, 223 const PrintingPolicy &Policy, 224 unsigned Indentation = 0) const { 225 printPretty(OS, *(ASTContext*)0, Helper, Policy, Indentation); 226 } 227 void printPretty(llvm::raw_ostream &OS, ASTContext &Context, 228 PrinterHelper *Helper, 229 const PrintingPolicy &Policy, 230 unsigned Indentation = 0) const; 231 232 /// viewAST - Visualize an AST rooted at this Stmt* using GraphViz. Only 233 /// works on systems with GraphViz (Mac OS X) or dot+gv installed. 234 void viewAST() const; 235 236 // Implement isa<T> support. 237 static bool classof(const Stmt *) { return true; } 238 239 /// hasImplicitControlFlow - Some statements (e.g. short circuited operations) 240 /// contain implicit control-flow in the order their subexpressions 241 /// are evaluated. This predicate returns true if this statement has 242 /// such implicit control-flow. Such statements are also specially handled 243 /// within CFGs. 244 bool hasImplicitControlFlow() const; 245 246 /// Child Iterators: All subclasses must implement child_begin and child_end 247 /// to permit easy iteration over the substatements/subexpessions of an 248 /// AST node. This permits easy iteration over all nodes in the AST. 249 typedef StmtIterator child_iterator; 250 typedef ConstStmtIterator const_child_iterator; 251 252 virtual child_iterator child_begin() = 0; 253 virtual child_iterator child_end() = 0; 254 255 const_child_iterator child_begin() const { 256 return const_child_iterator(const_cast<Stmt*>(this)->child_begin()); 257 } 258 259 const_child_iterator child_end() const { 260 return const_child_iterator(const_cast<Stmt*>(this)->child_end()); 261 } 262 263 /// \brief Produce a unique representation of the given statement. 264 /// 265 /// \brief ID once the profiling operation is complete, will contain 266 /// the unique representation of the given statement. 267 /// 268 /// \brief Context the AST context in which the statement resides 269 /// 270 /// \brief Canonical whether the profile should be based on the canonical 271 /// representation of this statement (e.g., where non-type template 272 /// parameters are identified by index/level rather than their 273 /// declaration pointers) or the exact representation of the statement as 274 /// written in the source. 275 void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context, 276 bool Canonical); 277}; 278 279/// DeclStmt - Adaptor class for mixing declarations with statements and 280/// expressions. For example, CompoundStmt mixes statements, expressions 281/// and declarations (variables, types). Another example is ForStmt, where 282/// the first statement can be an expression or a declaration. 283/// 284class DeclStmt : public Stmt { 285 DeclGroupRef DG; 286 SourceLocation StartLoc, EndLoc; 287 288public: 289 DeclStmt(DeclGroupRef dg, SourceLocation startLoc, 290 SourceLocation endLoc) : Stmt(DeclStmtClass), DG(dg), 291 StartLoc(startLoc), EndLoc(endLoc) {} 292 293 /// \brief Build an empty declaration statement. 294 explicit DeclStmt(EmptyShell Empty) : Stmt(DeclStmtClass, Empty) { } 295 296 /// isSingleDecl - This method returns true if this DeclStmt refers 297 /// to a single Decl. 298 bool isSingleDecl() const { 299 return DG.isSingleDecl(); 300 } 301 302 const Decl *getSingleDecl() const { return DG.getSingleDecl(); } 303 Decl *getSingleDecl() { return DG.getSingleDecl(); } 304 305 const DeclGroupRef getDeclGroup() const { return DG; } 306 DeclGroupRef getDeclGroup() { return DG; } 307 void setDeclGroup(DeclGroupRef DGR) { DG = DGR; } 308 309 SourceLocation getStartLoc() const { return StartLoc; } 310 void setStartLoc(SourceLocation L) { StartLoc = L; } 311 SourceLocation getEndLoc() const { return EndLoc; } 312 void setEndLoc(SourceLocation L) { EndLoc = L; } 313 314 SourceRange getSourceRange() const { 315 return SourceRange(StartLoc, EndLoc); 316 } 317 318 static bool classof(const Stmt *T) { 319 return T->getStmtClass() == DeclStmtClass; 320 } 321 static bool classof(const DeclStmt *) { return true; } 322 323 // Iterators over subexpressions. 324 virtual child_iterator child_begin(); 325 virtual child_iterator child_end(); 326 327 typedef DeclGroupRef::iterator decl_iterator; 328 typedef DeclGroupRef::const_iterator const_decl_iterator; 329 330 decl_iterator decl_begin() { return DG.begin(); } 331 decl_iterator decl_end() { return DG.end(); } 332 const_decl_iterator decl_begin() const { return DG.begin(); } 333 const_decl_iterator decl_end() const { return DG.end(); } 334}; 335 336/// NullStmt - This is the null statement ";": C99 6.8.3p3. 337/// 338class NullStmt : public Stmt { 339 SourceLocation SemiLoc; 340public: 341 NullStmt(SourceLocation L) : Stmt(NullStmtClass), SemiLoc(L) {} 342 343 /// \brief Build an empty null statement. 344 explicit NullStmt(EmptyShell Empty) : Stmt(NullStmtClass, Empty) { } 345 346 SourceLocation getSemiLoc() const { return SemiLoc; } 347 void setSemiLoc(SourceLocation L) { SemiLoc = L; } 348 349 virtual SourceRange getSourceRange() const { return SourceRange(SemiLoc); } 350 351 static bool classof(const Stmt *T) { 352 return T->getStmtClass() == NullStmtClass; 353 } 354 static bool classof(const NullStmt *) { return true; } 355 356 // Iterators 357 virtual child_iterator child_begin(); 358 virtual child_iterator child_end(); 359}; 360 361/// CompoundStmt - This represents a group of statements like { stmt stmt }. 362/// 363class CompoundStmt : public Stmt { 364 Stmt** Body; 365 unsigned NumStmts; 366 SourceLocation LBracLoc, RBracLoc; 367public: 368 CompoundStmt(ASTContext& C, Stmt **StmtStart, unsigned numStmts, 369 SourceLocation LB, SourceLocation RB) 370 : Stmt(CompoundStmtClass), NumStmts(numStmts), LBracLoc(LB), RBracLoc(RB) { 371 if (NumStmts == 0) { 372 Body = 0; 373 return; 374 } 375 376 Body = new (C) Stmt*[NumStmts]; 377 memcpy(Body, StmtStart, numStmts * sizeof(*Body)); 378 } 379 380 // \brief Build an empty compound statement. 381 explicit CompoundStmt(EmptyShell Empty) 382 : Stmt(CompoundStmtClass, Empty), Body(0), NumStmts(0) { } 383 384 void setStmts(ASTContext &C, Stmt **Stmts, unsigned NumStmts); 385 386 bool body_empty() const { return NumStmts == 0; } 387 unsigned size() const { return NumStmts; } 388 389 typedef Stmt** body_iterator; 390 body_iterator body_begin() { return Body; } 391 body_iterator body_end() { return Body + NumStmts; } 392 Stmt *body_back() { return NumStmts ? Body[NumStmts-1] : 0; } 393 394 typedef Stmt* const * const_body_iterator; 395 const_body_iterator body_begin() const { return Body; } 396 const_body_iterator body_end() const { return Body + NumStmts; } 397 const Stmt *body_back() const { return NumStmts ? Body[NumStmts-1] : 0; } 398 399 typedef std::reverse_iterator<body_iterator> reverse_body_iterator; 400 reverse_body_iterator body_rbegin() { 401 return reverse_body_iterator(body_end()); 402 } 403 reverse_body_iterator body_rend() { 404 return reverse_body_iterator(body_begin()); 405 } 406 407 typedef std::reverse_iterator<const_body_iterator> 408 const_reverse_body_iterator; 409 410 const_reverse_body_iterator body_rbegin() const { 411 return const_reverse_body_iterator(body_end()); 412 } 413 414 const_reverse_body_iterator body_rend() const { 415 return const_reverse_body_iterator(body_begin()); 416 } 417 418 virtual SourceRange getSourceRange() const { 419 return SourceRange(LBracLoc, RBracLoc); 420 } 421 422 SourceLocation getLBracLoc() const { return LBracLoc; } 423 void setLBracLoc(SourceLocation L) { LBracLoc = L; } 424 SourceLocation getRBracLoc() const { return RBracLoc; } 425 void setRBracLoc(SourceLocation L) { RBracLoc = L; } 426 427 static bool classof(const Stmt *T) { 428 return T->getStmtClass() == CompoundStmtClass; 429 } 430 static bool classof(const CompoundStmt *) { return true; } 431 432 // Iterators 433 virtual child_iterator child_begin(); 434 virtual child_iterator child_end(); 435}; 436 437// SwitchCase is the base class for CaseStmt and DefaultStmt, 438class SwitchCase : public Stmt { 439protected: 440 // A pointer to the following CaseStmt or DefaultStmt class, 441 // used by SwitchStmt. 442 SwitchCase *NextSwitchCase; 443 444 SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {} 445 446public: 447 const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; } 448 449 SwitchCase *getNextSwitchCase() { return NextSwitchCase; } 450 451 void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; } 452 453 Stmt *getSubStmt() { return v_getSubStmt(); } 454 455 virtual SourceRange getSourceRange() const { return SourceRange(); } 456 457 static bool classof(const Stmt *T) { 458 return T->getStmtClass() == CaseStmtClass || 459 T->getStmtClass() == DefaultStmtClass; 460 } 461 static bool classof(const SwitchCase *) { return true; } 462protected: 463 virtual Stmt* v_getSubStmt() = 0; 464}; 465 466class CaseStmt : public SwitchCase { 467 enum { SUBSTMT, LHS, RHS, END_EXPR }; 468 Stmt* SubExprs[END_EXPR]; // The expression for the RHS is Non-null for 469 // GNU "case 1 ... 4" extension 470 SourceLocation CaseLoc; 471 SourceLocation EllipsisLoc; 472 SourceLocation ColonLoc; 473 474 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 475public: 476 CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc, 477 SourceLocation ellipsisLoc, SourceLocation colonLoc) 478 : SwitchCase(CaseStmtClass) { 479 SubExprs[SUBSTMT] = 0; 480 SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs); 481 SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs); 482 CaseLoc = caseLoc; 483 EllipsisLoc = ellipsisLoc; 484 ColonLoc = colonLoc; 485 } 486 487 /// \brief Build an empty switch case statement. 488 explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { } 489 490 SourceLocation getCaseLoc() const { return CaseLoc; } 491 void setCaseLoc(SourceLocation L) { CaseLoc = L; } 492 SourceLocation getEllipsisLoc() const { return EllipsisLoc; } 493 void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; } 494 SourceLocation getColonLoc() const { return ColonLoc; } 495 void setColonLoc(SourceLocation L) { ColonLoc = L; } 496 497 Expr *getLHS() { return reinterpret_cast<Expr*>(SubExprs[LHS]); } 498 Expr *getRHS() { return reinterpret_cast<Expr*>(SubExprs[RHS]); } 499 Stmt *getSubStmt() { return SubExprs[SUBSTMT]; } 500 501 const Expr *getLHS() const { 502 return reinterpret_cast<const Expr*>(SubExprs[LHS]); 503 } 504 const Expr *getRHS() const { 505 return reinterpret_cast<const Expr*>(SubExprs[RHS]); 506 } 507 const Stmt *getSubStmt() const { return SubExprs[SUBSTMT]; } 508 509 void setSubStmt(Stmt *S) { SubExprs[SUBSTMT] = S; } 510 void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); } 511 void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); } 512 513 514 virtual SourceRange getSourceRange() const { 515 // Handle deeply nested case statements with iteration instead of recursion. 516 const CaseStmt *CS = this; 517 while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt())) 518 CS = CS2; 519 520 return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd()); 521 } 522 static bool classof(const Stmt *T) { 523 return T->getStmtClass() == CaseStmtClass; 524 } 525 static bool classof(const CaseStmt *) { return true; } 526 527 // Iterators 528 virtual child_iterator child_begin(); 529 virtual child_iterator child_end(); 530}; 531 532class DefaultStmt : public SwitchCase { 533 Stmt* SubStmt; 534 SourceLocation DefaultLoc; 535 SourceLocation ColonLoc; 536 virtual Stmt* v_getSubStmt() { return getSubStmt(); } 537public: 538 DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) : 539 SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL), 540 ColonLoc(CL) {} 541 542 /// \brief Build an empty default statement. 543 explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { } 544 545 Stmt *getSubStmt() { return SubStmt; } 546 const Stmt *getSubStmt() const { return SubStmt; } 547 void setSubStmt(Stmt *S) { SubStmt = S; } 548 549 SourceLocation getDefaultLoc() const { return DefaultLoc; } 550 void setDefaultLoc(SourceLocation L) { DefaultLoc = L; } 551 SourceLocation getColonLoc() const { return ColonLoc; } 552 void setColonLoc(SourceLocation L) { ColonLoc = L; } 553 554 virtual SourceRange getSourceRange() const { 555 return SourceRange(DefaultLoc, SubStmt->getLocEnd()); 556 } 557 static bool classof(const Stmt *T) { 558 return T->getStmtClass() == DefaultStmtClass; 559 } 560 static bool classof(const DefaultStmt *) { return true; } 561 562 // Iterators 563 virtual child_iterator child_begin(); 564 virtual child_iterator child_end(); 565}; 566 567class LabelStmt : public Stmt { 568 IdentifierInfo *Label; 569 Stmt *SubStmt; 570 SourceLocation IdentLoc; 571public: 572 LabelStmt(SourceLocation IL, IdentifierInfo *label, Stmt *substmt) 573 : Stmt(LabelStmtClass), Label(label), 574 SubStmt(substmt), IdentLoc(IL) {} 575 576 // \brief Build an empty label statement. 577 explicit LabelStmt(EmptyShell Empty) : Stmt(LabelStmtClass, Empty) { } 578 579 SourceLocation getIdentLoc() const { return IdentLoc; } 580 IdentifierInfo *getID() const { return Label; } 581 void setID(IdentifierInfo *II) { Label = II; } 582 const char *getName() const; 583 Stmt *getSubStmt() { return SubStmt; } 584 const Stmt *getSubStmt() const { return SubStmt; } 585 void setIdentLoc(SourceLocation L) { IdentLoc = L; } 586 void setSubStmt(Stmt *SS) { SubStmt = SS; } 587 588 virtual SourceRange getSourceRange() const { 589 return SourceRange(IdentLoc, SubStmt->getLocEnd()); 590 } 591 static bool classof(const Stmt *T) { 592 return T->getStmtClass() == LabelStmtClass; 593 } 594 static bool classof(const LabelStmt *) { return true; } 595 596 // Iterators 597 virtual child_iterator child_begin(); 598 virtual child_iterator child_end(); 599}; 600 601 602/// IfStmt - This represents an if/then/else. 603/// 604class IfStmt : public Stmt { 605 enum { COND, THEN, ELSE, END_EXPR }; 606 Stmt* SubExprs[END_EXPR]; 607 608 /// \brief If non-NULL, the declaration in the "if" statement. 609 VarDecl *Var; 610 611 SourceLocation IfLoc; 612 SourceLocation ElseLoc; 613 614public: 615 IfStmt(SourceLocation IL, VarDecl *Var, Expr *cond, Stmt *then, 616 SourceLocation EL = SourceLocation(), Stmt *elsev = 0) 617 : Stmt(IfStmtClass), Var(Var), IfLoc(IL), ElseLoc(EL) { 618 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 619 SubExprs[THEN] = then; 620 SubExprs[ELSE] = elsev; 621 } 622 623 /// \brief Build an empty if/then/else statement 624 explicit IfStmt(EmptyShell Empty) : Stmt(IfStmtClass, Empty) { } 625 626 /// \brief Retrieve the variable declared in this "if" statement, if any. 627 /// 628 /// In the following example, "x" is the condition variable. 629 /// \code 630 /// if (int x = foo()) { 631 /// printf("x is %d", x); 632 /// } 633 /// \endcode 634 VarDecl *getConditionVariable() const { return Var; } 635 void setConditionVariable(VarDecl *V) { Var = V; } 636 637 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 638 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 639 const Stmt *getThen() const { return SubExprs[THEN]; } 640 void setThen(Stmt *S) { SubExprs[THEN] = S; } 641 const Stmt *getElse() const { return SubExprs[ELSE]; } 642 void setElse(Stmt *S) { SubExprs[ELSE] = S; } 643 644 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 645 Stmt *getThen() { return SubExprs[THEN]; } 646 Stmt *getElse() { return SubExprs[ELSE]; } 647 648 SourceLocation getIfLoc() const { return IfLoc; } 649 void setIfLoc(SourceLocation L) { IfLoc = L; } 650 SourceLocation getElseLoc() const { return ElseLoc; } 651 void setElseLoc(SourceLocation L) { ElseLoc = L; } 652 653 virtual SourceRange getSourceRange() const { 654 if (SubExprs[ELSE]) 655 return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd()); 656 else 657 return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd()); 658 } 659 660 static bool classof(const Stmt *T) { 661 return T->getStmtClass() == IfStmtClass; 662 } 663 static bool classof(const IfStmt *) { return true; } 664 665 // Iterators 666 virtual child_iterator child_begin(); 667 virtual child_iterator child_end(); 668}; 669 670/// SwitchStmt - This represents a 'switch' stmt. 671/// 672class SwitchStmt : public Stmt { 673 enum { COND, BODY, END_EXPR }; 674 Stmt* SubExprs[END_EXPR]; 675 // This points to a linked list of case and default statements. 676 SwitchCase *FirstCase; 677 SourceLocation SwitchLoc; 678 679protected: 680 virtual void DoDestroy(ASTContext &Ctx); 681 682public: 683 SwitchStmt(Expr *cond) : Stmt(SwitchStmtClass), FirstCase(0) { 684 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 685 SubExprs[BODY] = NULL; 686 } 687 688 /// \brief Build a empty switch statement. 689 explicit SwitchStmt(EmptyShell Empty) : Stmt(SwitchStmtClass, Empty) { } 690 691 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 692 const Stmt *getBody() const { return SubExprs[BODY]; } 693 const SwitchCase *getSwitchCaseList() const { return FirstCase; } 694 695 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]);} 696 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt *>(E); } 697 Stmt *getBody() { return SubExprs[BODY]; } 698 void setBody(Stmt *S) { SubExprs[BODY] = S; } 699 SwitchCase *getSwitchCaseList() { return FirstCase; } 700 701 /// \brief Set the case list for this switch statement. 702 /// 703 /// The caller is responsible for incrementing the retain counts on 704 /// all of the SwitchCase statements in this list. 705 void setSwitchCaseList(SwitchCase *SC) { FirstCase = SC; } 706 707 SourceLocation getSwitchLoc() const { return SwitchLoc; } 708 void setSwitchLoc(SourceLocation L) { SwitchLoc = L; } 709 710 void setBody(Stmt *S, SourceLocation SL) { 711 SubExprs[BODY] = S; 712 SwitchLoc = SL; 713 } 714 void addSwitchCase(SwitchCase *SC) { 715 assert(!SC->getNextSwitchCase() && "case/default already added to a switch"); 716 SC->Retain(); 717 SC->setNextSwitchCase(FirstCase); 718 FirstCase = SC; 719 } 720 virtual SourceRange getSourceRange() const { 721 return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd()); 722 } 723 static bool classof(const Stmt *T) { 724 return T->getStmtClass() == SwitchStmtClass; 725 } 726 static bool classof(const SwitchStmt *) { return true; } 727 728 // Iterators 729 virtual child_iterator child_begin(); 730 virtual child_iterator child_end(); 731}; 732 733 734/// WhileStmt - This represents a 'while' stmt. 735/// 736class WhileStmt : public Stmt { 737 enum { COND, BODY, END_EXPR }; 738 Stmt* SubExprs[END_EXPR]; 739 SourceLocation WhileLoc; 740public: 741 WhileStmt(Expr *cond, Stmt *body, SourceLocation WL) : Stmt(WhileStmtClass) { 742 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 743 SubExprs[BODY] = body; 744 WhileLoc = WL; 745 } 746 747 /// \brief Build an empty while statement. 748 explicit WhileStmt(EmptyShell Empty) : Stmt(WhileStmtClass, Empty) { } 749 750 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 751 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 752 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 753 Stmt *getBody() { return SubExprs[BODY]; } 754 const Stmt *getBody() const { return SubExprs[BODY]; } 755 void setBody(Stmt *S) { SubExprs[BODY] = S; } 756 757 SourceLocation getWhileLoc() const { return WhileLoc; } 758 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 759 760 virtual SourceRange getSourceRange() const { 761 return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd()); 762 } 763 static bool classof(const Stmt *T) { 764 return T->getStmtClass() == WhileStmtClass; 765 } 766 static bool classof(const WhileStmt *) { return true; } 767 768 // Iterators 769 virtual child_iterator child_begin(); 770 virtual child_iterator child_end(); 771}; 772 773/// DoStmt - This represents a 'do/while' stmt. 774/// 775class DoStmt : public Stmt { 776 enum { COND, BODY, END_EXPR }; 777 Stmt* SubExprs[END_EXPR]; 778 SourceLocation DoLoc; 779 SourceLocation WhileLoc; 780 SourceLocation RParenLoc; // Location of final ')' in do stmt condition. 781 782public: 783 DoStmt(Stmt *body, Expr *cond, SourceLocation DL, SourceLocation WL, 784 SourceLocation RP) 785 : Stmt(DoStmtClass), DoLoc(DL), WhileLoc(WL), RParenLoc(RP) { 786 SubExprs[COND] = reinterpret_cast<Stmt*>(cond); 787 SubExprs[BODY] = body; 788 } 789 790 /// \brief Build an empty do-while statement. 791 explicit DoStmt(EmptyShell Empty) : Stmt(DoStmtClass, Empty) { } 792 793 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 794 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 795 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 796 Stmt *getBody() { return SubExprs[BODY]; } 797 const Stmt *getBody() const { return SubExprs[BODY]; } 798 void setBody(Stmt *S) { SubExprs[BODY] = S; } 799 800 SourceLocation getDoLoc() const { return DoLoc; } 801 void setDoLoc(SourceLocation L) { DoLoc = L; } 802 SourceLocation getWhileLoc() const { return WhileLoc; } 803 void setWhileLoc(SourceLocation L) { WhileLoc = L; } 804 805 SourceLocation getRParenLoc() const { return RParenLoc; } 806 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 807 808 virtual SourceRange getSourceRange() const { 809 return SourceRange(DoLoc, RParenLoc); 810 } 811 static bool classof(const Stmt *T) { 812 return T->getStmtClass() == DoStmtClass; 813 } 814 static bool classof(const DoStmt *) { return true; } 815 816 // Iterators 817 virtual child_iterator child_begin(); 818 virtual child_iterator child_end(); 819}; 820 821 822/// ForStmt - This represents a 'for (init;cond;inc)' stmt. Note that any of 823/// the init/cond/inc parts of the ForStmt will be null if they were not 824/// specified in the source. 825/// 826class ForStmt : public Stmt { 827 enum { INIT, COND, INC, BODY, END_EXPR }; 828 Stmt* SubExprs[END_EXPR]; // SubExprs[INIT] is an expression or declstmt. 829 SourceLocation ForLoc; 830 SourceLocation LParenLoc, RParenLoc; 831 832public: 833 ForStmt(Stmt *Init, Expr *Cond, Expr *Inc, Stmt *Body, SourceLocation FL, 834 SourceLocation LP, SourceLocation RP) 835 : Stmt(ForStmtClass) { 836 SubExprs[INIT] = Init; 837 SubExprs[COND] = reinterpret_cast<Stmt*>(Cond); 838 SubExprs[INC] = reinterpret_cast<Stmt*>(Inc); 839 SubExprs[BODY] = Body; 840 ForLoc = FL; 841 LParenLoc = LP; 842 RParenLoc = RP; 843 } 844 845 /// \brief Build an empty for statement. 846 explicit ForStmt(EmptyShell Empty) : Stmt(ForStmtClass, Empty) { } 847 848 Stmt *getInit() { return SubExprs[INIT]; } 849 Expr *getCond() { return reinterpret_cast<Expr*>(SubExprs[COND]); } 850 Expr *getInc() { return reinterpret_cast<Expr*>(SubExprs[INC]); } 851 Stmt *getBody() { return SubExprs[BODY]; } 852 853 const Stmt *getInit() const { return SubExprs[INIT]; } 854 const Expr *getCond() const { return reinterpret_cast<Expr*>(SubExprs[COND]);} 855 const Expr *getInc() const { return reinterpret_cast<Expr*>(SubExprs[INC]); } 856 const Stmt *getBody() const { return SubExprs[BODY]; } 857 858 void setInit(Stmt *S) { SubExprs[INIT] = S; } 859 void setCond(Expr *E) { SubExprs[COND] = reinterpret_cast<Stmt*>(E); } 860 void setInc(Expr *E) { SubExprs[INC] = reinterpret_cast<Stmt*>(E); } 861 void setBody(Stmt *S) { SubExprs[BODY] = S; } 862 863 SourceLocation getForLoc() const { return ForLoc; } 864 void setForLoc(SourceLocation L) { ForLoc = L; } 865 SourceLocation getLParenLoc() const { return LParenLoc; } 866 void setLParenLoc(SourceLocation L) { LParenLoc = L; } 867 SourceLocation getRParenLoc() const { return RParenLoc; } 868 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 869 870 virtual SourceRange getSourceRange() const { 871 return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd()); 872 } 873 static bool classof(const Stmt *T) { 874 return T->getStmtClass() == ForStmtClass; 875 } 876 static bool classof(const ForStmt *) { return true; } 877 878 // Iterators 879 virtual child_iterator child_begin(); 880 virtual child_iterator child_end(); 881}; 882 883/// GotoStmt - This represents a direct goto. 884/// 885class GotoStmt : public Stmt { 886 LabelStmt *Label; 887 SourceLocation GotoLoc; 888 SourceLocation LabelLoc; 889public: 890 GotoStmt(LabelStmt *label, SourceLocation GL, SourceLocation LL) 891 : Stmt(GotoStmtClass), Label(label), GotoLoc(GL), LabelLoc(LL) {} 892 893 /// \brief Build an empty goto statement. 894 explicit GotoStmt(EmptyShell Empty) : Stmt(GotoStmtClass, Empty) { } 895 896 LabelStmt *getLabel() const { return Label; } 897 void setLabel(LabelStmt *S) { Label = S; } 898 899 SourceLocation getGotoLoc() const { return GotoLoc; } 900 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 901 SourceLocation getLabelLoc() const { return LabelLoc; } 902 void setLabelLoc(SourceLocation L) { LabelLoc = L; } 903 904 virtual SourceRange getSourceRange() const { 905 return SourceRange(GotoLoc, LabelLoc); 906 } 907 static bool classof(const Stmt *T) { 908 return T->getStmtClass() == GotoStmtClass; 909 } 910 static bool classof(const GotoStmt *) { return true; } 911 912 // Iterators 913 virtual child_iterator child_begin(); 914 virtual child_iterator child_end(); 915}; 916 917/// IndirectGotoStmt - This represents an indirect goto. 918/// 919class IndirectGotoStmt : public Stmt { 920 SourceLocation GotoLoc; 921 SourceLocation StarLoc; 922 Stmt *Target; 923public: 924 IndirectGotoStmt(SourceLocation gotoLoc, SourceLocation starLoc, 925 Expr *target) 926 : Stmt(IndirectGotoStmtClass), GotoLoc(gotoLoc), StarLoc(starLoc), 927 Target((Stmt*)target) {} 928 929 /// \brief Build an empty indirect goto statement. 930 explicit IndirectGotoStmt(EmptyShell Empty) 931 : Stmt(IndirectGotoStmtClass, Empty) { } 932 933 void setGotoLoc(SourceLocation L) { GotoLoc = L; } 934 SourceLocation getGotoLoc() const { return GotoLoc; } 935 void setStarLoc(SourceLocation L) { StarLoc = L; } 936 SourceLocation getStarLoc() const { return StarLoc; } 937 938 Expr *getTarget(); 939 const Expr *getTarget() const; 940 void setTarget(Expr *E) { Target = reinterpret_cast<Stmt*>(E); } 941 942 virtual SourceRange getSourceRange() const { 943 return SourceRange(GotoLoc, Target->getLocEnd()); 944 } 945 946 static bool classof(const Stmt *T) { 947 return T->getStmtClass() == IndirectGotoStmtClass; 948 } 949 static bool classof(const IndirectGotoStmt *) { return true; } 950 951 // Iterators 952 virtual child_iterator child_begin(); 953 virtual child_iterator child_end(); 954}; 955 956 957/// ContinueStmt - This represents a continue. 958/// 959class ContinueStmt : public Stmt { 960 SourceLocation ContinueLoc; 961public: 962 ContinueStmt(SourceLocation CL) : Stmt(ContinueStmtClass), ContinueLoc(CL) {} 963 964 /// \brief Build an empty continue statement. 965 explicit ContinueStmt(EmptyShell Empty) : Stmt(ContinueStmtClass, Empty) { } 966 967 SourceLocation getContinueLoc() const { return ContinueLoc; } 968 void setContinueLoc(SourceLocation L) { ContinueLoc = L; } 969 970 virtual SourceRange getSourceRange() const { 971 return SourceRange(ContinueLoc); 972 } 973 974 static bool classof(const Stmt *T) { 975 return T->getStmtClass() == ContinueStmtClass; 976 } 977 static bool classof(const ContinueStmt *) { return true; } 978 979 // Iterators 980 virtual child_iterator child_begin(); 981 virtual child_iterator child_end(); 982}; 983 984/// BreakStmt - This represents a break. 985/// 986class BreakStmt : public Stmt { 987 SourceLocation BreakLoc; 988public: 989 BreakStmt(SourceLocation BL) : Stmt(BreakStmtClass), BreakLoc(BL) {} 990 991 /// \brief Build an empty break statement. 992 explicit BreakStmt(EmptyShell Empty) : Stmt(BreakStmtClass, Empty) { } 993 994 SourceLocation getBreakLoc() const { return BreakLoc; } 995 void setBreakLoc(SourceLocation L) { BreakLoc = L; } 996 997 virtual SourceRange getSourceRange() const { return SourceRange(BreakLoc); } 998 999 static bool classof(const Stmt *T) { 1000 return T->getStmtClass() == BreakStmtClass; 1001 } 1002 static bool classof(const BreakStmt *) { return true; } 1003 1004 // Iterators 1005 virtual child_iterator child_begin(); 1006 virtual child_iterator child_end(); 1007}; 1008 1009 1010/// ReturnStmt - This represents a return, optionally of an expression: 1011/// return; 1012/// return 4; 1013/// 1014/// Note that GCC allows return with no argument in a function declared to 1015/// return a value, and it allows returning a value in functions declared to 1016/// return void. We explicitly model this in the AST, which means you can't 1017/// depend on the return type of the function and the presence of an argument. 1018/// 1019class ReturnStmt : public Stmt { 1020 Stmt *RetExpr; 1021 SourceLocation RetLoc; 1022public: 1023 ReturnStmt(SourceLocation RL, Expr *E = 0) : Stmt(ReturnStmtClass), 1024 RetExpr((Stmt*) E), RetLoc(RL) {} 1025 1026 /// \brief Build an empty return expression. 1027 explicit ReturnStmt(EmptyShell Empty) : Stmt(ReturnStmtClass, Empty) { } 1028 1029 const Expr *getRetValue() const; 1030 Expr *getRetValue(); 1031 void setRetValue(Expr *E) { RetExpr = reinterpret_cast<Stmt*>(E); } 1032 1033 SourceLocation getReturnLoc() const { return RetLoc; } 1034 void setReturnLoc(SourceLocation L) { RetLoc = L; } 1035 1036 virtual SourceRange getSourceRange() const; 1037 1038 static bool classof(const Stmt *T) { 1039 return T->getStmtClass() == ReturnStmtClass; 1040 } 1041 static bool classof(const ReturnStmt *) { return true; } 1042 1043 // Iterators 1044 virtual child_iterator child_begin(); 1045 virtual child_iterator child_end(); 1046}; 1047 1048/// AsmStmt - This represents a GNU inline-assembly statement extension. 1049/// 1050class AsmStmt : public Stmt { 1051 SourceLocation AsmLoc, RParenLoc; 1052 StringLiteral *AsmStr; 1053 1054 bool IsSimple; 1055 bool IsVolatile; 1056 1057 unsigned NumOutputs; 1058 unsigned NumInputs; 1059 1060 llvm::SmallVector<std::string, 4> Names; 1061 llvm::SmallVector<StringLiteral*, 4> Constraints; 1062 llvm::SmallVector<Stmt*, 4> Exprs; 1063 1064 llvm::SmallVector<StringLiteral*, 4> Clobbers; 1065public: 1066 AsmStmt(SourceLocation asmloc, bool issimple, bool isvolatile, 1067 unsigned numoutputs, unsigned numinputs, 1068 std::string *names, StringLiteral **constraints, 1069 Expr **exprs, StringLiteral *asmstr, unsigned numclobbers, 1070 StringLiteral **clobbers, SourceLocation rparenloc); 1071 1072 /// \brief Build an empty inline-assembly statement. 1073 explicit AsmStmt(EmptyShell Empty) : Stmt(AsmStmtClass, Empty) { } 1074 1075 SourceLocation getAsmLoc() const { return AsmLoc; } 1076 void setAsmLoc(SourceLocation L) { AsmLoc = L; } 1077 SourceLocation getRParenLoc() const { return RParenLoc; } 1078 void setRParenLoc(SourceLocation L) { RParenLoc = L; } 1079 1080 bool isVolatile() const { return IsVolatile; } 1081 void setVolatile(bool V) { IsVolatile = V; } 1082 bool isSimple() const { return IsSimple; } 1083 void setSimple(bool V) { IsSimple = false; } 1084 1085 //===--- Asm String Analysis ---===// 1086 1087 const StringLiteral *getAsmString() const { return AsmStr; } 1088 StringLiteral *getAsmString() { return AsmStr; } 1089 void setAsmString(StringLiteral *E) { AsmStr = E; } 1090 1091 /// AsmStringPiece - this is part of a decomposed asm string specification 1092 /// (for use with the AnalyzeAsmString function below). An asm string is 1093 /// considered to be a concatenation of these parts. 1094 class AsmStringPiece { 1095 public: 1096 enum Kind { 1097 String, // String in .ll asm string form, "$" -> "$$" and "%%" -> "%". 1098 Operand // Operand reference, with optional modifier %c4. 1099 }; 1100 private: 1101 Kind MyKind; 1102 std::string Str; 1103 unsigned OperandNo; 1104 public: 1105 AsmStringPiece(const std::string &S) : MyKind(String), Str(S) {} 1106 AsmStringPiece(unsigned OpNo, char Modifier) 1107 : MyKind(Operand), Str(), OperandNo(OpNo) { 1108 Str += Modifier; 1109 } 1110 1111 bool isString() const { return MyKind == String; } 1112 bool isOperand() const { return MyKind == Operand; } 1113 1114 const std::string &getString() const { 1115 assert(isString()); 1116 return Str; 1117 } 1118 1119 unsigned getOperandNo() const { 1120 assert(isOperand()); 1121 return OperandNo; 1122 } 1123 1124 /// getModifier - Get the modifier for this operand, if present. This 1125 /// returns '\0' if there was no modifier. 1126 char getModifier() const { 1127 assert(isOperand()); 1128 return Str[0]; 1129 } 1130 }; 1131 1132 /// AnalyzeAsmString - Analyze the asm string of the current asm, decomposing 1133 /// it into pieces. If the asm string is erroneous, emit errors and return 1134 /// true, otherwise return false. This handles canonicalization and 1135 /// translation of strings from GCC syntax to LLVM IR syntax, and handles 1136 //// flattening of named references like %[foo] to Operand AsmStringPiece's. 1137 unsigned AnalyzeAsmString(llvm::SmallVectorImpl<AsmStringPiece> &Pieces, 1138 ASTContext &C, unsigned &DiagOffs) const; 1139 1140 1141 //===--- Output operands ---===// 1142 1143 unsigned getNumOutputs() const { return NumOutputs; } 1144 1145 const std::string &getOutputName(unsigned i) const { 1146 return Names[i]; 1147 } 1148 1149 /// getOutputConstraint - Return the constraint string for the specified 1150 /// output operand. All output constraints are known to be non-empty (either 1151 /// '=' or '+'). 1152 std::string getOutputConstraint(unsigned i) const; 1153 1154 const StringLiteral *getOutputConstraintLiteral(unsigned i) const { 1155 return Constraints[i]; 1156 } 1157 StringLiteral *getOutputConstraintLiteral(unsigned i) { 1158 return Constraints[i]; 1159 } 1160 1161 1162 Expr *getOutputExpr(unsigned i); 1163 1164 const Expr *getOutputExpr(unsigned i) const { 1165 return const_cast<AsmStmt*>(this)->getOutputExpr(i); 1166 } 1167 1168 /// isOutputPlusConstraint - Return true if the specified output constraint 1169 /// is a "+" constraint (which is both an input and an output) or false if it 1170 /// is an "=" constraint (just an output). 1171 bool isOutputPlusConstraint(unsigned i) const { 1172 return getOutputConstraint(i)[0] == '+'; 1173 } 1174 1175 /// getNumPlusOperands - Return the number of output operands that have a "+" 1176 /// constraint. 1177 unsigned getNumPlusOperands() const; 1178 1179 //===--- Input operands ---===// 1180 1181 unsigned getNumInputs() const { return NumInputs; } 1182 1183 const std::string &getInputName(unsigned i) const { 1184 return Names[i + NumOutputs]; 1185 } 1186 1187 /// getInputConstraint - Return the specified input constraint. Unlike output 1188 /// constraints, these can be empty. 1189 std::string getInputConstraint(unsigned i) const; 1190 1191 const StringLiteral *getInputConstraintLiteral(unsigned i) const { 1192 return Constraints[i + NumOutputs]; 1193 } 1194 StringLiteral *getInputConstraintLiteral(unsigned i) { 1195 return Constraints[i + NumOutputs]; 1196 } 1197 1198 1199 Expr *getInputExpr(unsigned i); 1200 1201 const Expr *getInputExpr(unsigned i) const { 1202 return const_cast<AsmStmt*>(this)->getInputExpr(i); 1203 } 1204 1205 void setOutputsAndInputs(unsigned NumOutputs, 1206 unsigned NumInputs, 1207 const std::string *Names, 1208 StringLiteral **Constraints, 1209 Stmt **Exprs); 1210 1211 //===--- Other ---===// 1212 1213 /// getNamedOperand - Given a symbolic operand reference like %[foo], 1214 /// translate this into a numeric value needed to reference the same operand. 1215 /// This returns -1 if the operand name is invalid. 1216 int getNamedOperand(const std::string &SymbolicName) const; 1217 1218 1219 1220 unsigned getNumClobbers() const { return Clobbers.size(); } 1221 StringLiteral *getClobber(unsigned i) { return Clobbers[i]; } 1222 const StringLiteral *getClobber(unsigned i) const { return Clobbers[i]; } 1223 void setClobbers(StringLiteral **Clobbers, unsigned NumClobbers); 1224 1225 virtual SourceRange getSourceRange() const { 1226 return SourceRange(AsmLoc, RParenLoc); 1227 } 1228 1229 static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;} 1230 static bool classof(const AsmStmt *) { return true; } 1231 1232 // Input expr iterators. 1233 1234 typedef ExprIterator inputs_iterator; 1235 typedef ConstExprIterator const_inputs_iterator; 1236 1237 inputs_iterator begin_inputs() { 1238 return Exprs.data() + NumOutputs; 1239 } 1240 1241 inputs_iterator end_inputs() { 1242 return Exprs.data() + NumOutputs + NumInputs; 1243 } 1244 1245 const_inputs_iterator begin_inputs() const { 1246 return Exprs.data() + NumOutputs; 1247 } 1248 1249 const_inputs_iterator end_inputs() const { 1250 return Exprs.data() + NumOutputs + NumInputs; 1251 } 1252 1253 // Output expr iterators. 1254 1255 typedef ExprIterator outputs_iterator; 1256 typedef ConstExprIterator const_outputs_iterator; 1257 1258 outputs_iterator begin_outputs() { 1259 return Exprs.data(); 1260 } 1261 outputs_iterator end_outputs() { 1262 return Exprs.data() + NumOutputs; 1263 } 1264 1265 const_outputs_iterator begin_outputs() const { 1266 return Exprs.data(); 1267 } 1268 const_outputs_iterator end_outputs() const { 1269 return Exprs.data() + NumOutputs; 1270 } 1271 1272 // Input name iterator. 1273 1274 const std::string *begin_output_names() const { 1275 return &Names[0]; 1276 } 1277 1278 const std::string *end_output_names() const { 1279 return &Names[0] + NumOutputs; 1280 } 1281 1282 // Child iterators 1283 1284 virtual child_iterator child_begin(); 1285 virtual child_iterator child_end(); 1286}; 1287 1288} // end namespace clang 1289 1290#endif 1291