CFG.h revision 7247c88d1e41514a41085f83ebf03dd5220e054a
1fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===--- CFG.h - Classes for representing and building CFGs------*- C++ -*-===// 2fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 3fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// The LLVM Compiler Infrastructure 4fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 7fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 8fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===----------------------------------------------------------------------===// 9fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 10fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// This file defines the CFG and CFGBuilder classes for representing and 11fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// building Control-Flow Graphs (CFGs) from ASTs. 12fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 13fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===----------------------------------------------------------------------===// 14fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 15cd881d534517f09a2fae10445f9b865f49ccc6c8Ted Kremenek#ifndef LLVM_CLANG_CFG_H 16cd881d534517f09a2fae10445f9b865f49ccc6c8Ted Kremenek#define LLVM_CLANG_CFG_H 17cd881d534517f09a2fae10445f9b865f49ccc6c8Ted Kremenek 1874fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek#include "clang/AST/Stmt.h" 19ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek#include "clang/Analysis/Support/BumpVector.h" 20079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump#include "clang/Basic/SourceLocation.h" 2130a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth#include "llvm/ADT/DenseMap.h" 2230a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth#include "llvm/ADT/GraphTraits.h" 23fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie#include "llvm/ADT/Optional.h" 2430a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth#include "llvm/ADT/OwningPtr.h" 2530a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth#include "llvm/ADT/PointerIntPair.h" 2630a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth#include "llvm/Support/Allocator.h" 2730a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth#include "llvm/Support/Casting.h" 28681ab8998793899076bae9cd6383a5d78b8ee1acBenjamin Kramer#include <bitset> 29c1581a0d64b0ee4f822ed2fca4442a111d03569aHartmut Kaiser#include <cassert> 30403ba3522d1b1c97ae5fad81c1a2c4b3a754e1c1Nick Lewycky#include <iterator> 31fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 32fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremeneknamespace clang { 333c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek class CXXDestructorDecl; 34b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump class Decl; 3542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek class Stmt; 3663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek class Expr; 377c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski class FieldDecl; 381cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski class VarDecl; 39cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt class CXXCtorInitializer; 407c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski class CXXBaseSpecifier; 418599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski class CXXBindTemporaryExpr; 4242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek class CFG; 4342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek class PrinterHelper; 44e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner class LangOptions; 45e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump class ASTContext; 46e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump 47852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek/// CFGElement - Represents a top-level expression in a basic block. 48852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekclass CFGElement { 49852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekpublic: 50b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu enum Kind { 51b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu // main kind 52b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu Statement, 53b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu Initializer, 54b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu // dtor kind 55b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu AutomaticObjectDtor, 56b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu BaseDtor, 57b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu MemberDtor, 58b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu TemporaryDtor, 593c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek DTOR_BEGIN = AutomaticObjectDtor, 603c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek DTOR_END = TemporaryDtor 61b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu }; 62b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 63b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuprotected: 643c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek // The int bits are used to mark the kind. 65b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu llvm::PointerIntPair<void *, 2> Data1; 66b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu llvm::PointerIntPair<void *, 2> Data2; 67b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 683c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGElement(Kind kind, const void *Ptr1, const void *Ptr2 = 0) 693c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : Data1(const_cast<void*>(Ptr1), ((unsigned) kind) & 0x3), 70ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie Data2(const_cast<void*>(Ptr2), (((unsigned) kind) >> 2) & 0x3) {} 711cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 72b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGElement() {} 73b07805485c603be3d8011f72611465324c9e664bDavid Blaikiepublic: 74b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 75fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie /// \brief Convert to the specified CFGElement type, asserting that this 76fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie /// CFGElement is of the desired type. 77fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie template<typename T> 78fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie T castAs() const { 79fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie assert(T::isKind(*this)); 80fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie T t; 81fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGElement& e = t; 82fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie e = *this; 83fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return t; 84fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie } 85fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie 86b07805485c603be3d8011f72611465324c9e664bDavid Blaikie /// \brief Convert to the specified CFGElement type, returning None if this 87b07805485c603be3d8011f72611465324c9e664bDavid Blaikie /// CFGElement is not of the desired type. 88fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie template<typename T> 89b07805485c603be3d8011f72611465324c9e664bDavid Blaikie Optional<T> getAs() const { 90fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie if (!T::isKind(*this)) 91b07805485c603be3d8011f72611465324c9e664bDavid Blaikie return None; 92fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie T t; 93fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGElement& e = t; 94fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie e = *this; 95fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return t; 96fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie } 97fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie 98ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie Kind getKind() const { 993c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek unsigned x = Data2.getInt(); 1003c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek x <<= 2; 1013c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek x |= Data1.getInt(); 1023c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return (Kind) x; 103b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 104b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 105b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 106b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGStmt : public CFGElement { 107b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 1083c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGStmt(Stmt *S) : CFGElement(Statement, S) {} 109b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 110ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie const Stmt *getStmt() const { 111f1d10d939739f1a4544926d807e4f0f9fb64be61Ted Kremenek return static_cast<const Stmt *>(Data1.getPointer()); 112f1d10d939739f1a4544926d807e4f0f9fb64be61Ted Kremenek } 113b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 114fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 115fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 116fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGStmt() {} 117fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &E) { 118fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return E.getKind() == Statement; 119b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 120b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 121b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 1221cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski/// CFGInitializer - Represents C++ base or member initializer from 1231cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski/// constructor's initialization list. 124b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGInitializer : public CFGElement { 125b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 1263c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGInitializer(CXXCtorInitializer *initializer) 1273c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : CFGElement(Initializer, initializer) {} 1281cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 129cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt CXXCtorInitializer* getInitializer() const { 130cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt return static_cast<CXXCtorInitializer*>(Data1.getPointer()); 1311cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski } 1321cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 133fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 134fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 135fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGInitializer() {} 136fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &E) { 137fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return E.getKind() == Initializer; 138b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 139b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 140b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 14153de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski/// CFGImplicitDtor - Represents C++ object destructor implicitly generated 1421cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski/// by compiler on various occasions. 143b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGImplicitDtor : public CFGElement { 1441cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderskiprotected: 145fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGImplicitDtor() {} 146ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie CFGImplicitDtor(Kind kind, const void *data1, const void *data2 = 0) 1473c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : CFGElement(kind, data1, data2) { 148ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie assert(kind >= DTOR_BEGIN && kind <= DTOR_END); 1493c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek } 1501cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 151b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 152c5aff4497e5bfd7523e00b87560c1a5aa65136ccTed Kremenek const CXXDestructorDecl *getDestructorDecl(ASTContext &astContext) const; 153c5aff4497e5bfd7523e00b87560c1a5aa65136ccTed Kremenek bool isNoReturn(ASTContext &astContext) const; 1541cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 155fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 156fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 157fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &E) { 158fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie Kind kind = E.getKind(); 1593c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return kind >= DTOR_BEGIN && kind <= DTOR_END; 160b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 161b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 162b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 1637c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski/// CFGAutomaticObjDtor - Represents C++ object destructor implicitly generated 1641cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski/// for automatic object or temporary bound to const reference at the point 1651cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski/// of leaving its local scope. 166b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGAutomaticObjDtor: public CFGImplicitDtor { 167b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 1683c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGAutomaticObjDtor(const VarDecl *var, const Stmt *stmt) 1693c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : CFGImplicitDtor(AutomaticObjectDtor, var, stmt) {} 1701cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 1713c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek const VarDecl *getVarDecl() const { 1721cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski return static_cast<VarDecl*>(Data1.getPointer()); 1731cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski } 1741cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 1751cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski // Get statement end of which triggered the destructor call. 1763c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek const Stmt *getTriggerStmt() const { 1771cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski return static_cast<Stmt*>(Data2.getPointer()); 1781cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski } 1791cff132e48e0ccc253c34e5a2fb12718bd4e7d2eMarcin Swiderski 180fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 181fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 182fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGAutomaticObjDtor() {} 183fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &elem) { 184fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return elem.getKind() == AutomaticObjectDtor; 185b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 186b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 187b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 1887c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski/// CFGBaseDtor - Represents C++ object destructor implicitly generated for 1897c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski/// base object in destructor. 190b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGBaseDtor : public CFGImplicitDtor { 191b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 1923c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGBaseDtor(const CXXBaseSpecifier *base) 1933c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : CFGImplicitDtor(BaseDtor, base) {} 1947c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski 1957c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski const CXXBaseSpecifier *getBaseSpecifier() const { 1967c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski return static_cast<const CXXBaseSpecifier*>(Data1.getPointer()); 1977c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski } 1987c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski 199fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 200fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 201fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGBaseDtor() {} 202fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &E) { 203fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return E.getKind() == BaseDtor; 204b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 205b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 206b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 2077c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski/// CFGMemberDtor - Represents C++ object destructor implicitly generated for 2087c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski/// member object in destructor. 209b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGMemberDtor : public CFGImplicitDtor { 210b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 2113c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGMemberDtor(const FieldDecl *field) 2123c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : CFGImplicitDtor(MemberDtor, field, 0) {} 2137c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski 2143c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek const FieldDecl *getFieldDecl() const { 2153c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return static_cast<const FieldDecl*>(Data1.getPointer()); 2167c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski } 2177c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski 218fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 219fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 220fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGMemberDtor() {} 221fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &E) { 222fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return E.getKind() == MemberDtor; 223b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 224b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu}; 225b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu 2268599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski/// CFGTemporaryDtor - Represents C++ object destructor implicitly generated 2278599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski/// at the end of full expression for temporary object. 228b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xuclass CFGTemporaryDtor : public CFGImplicitDtor { 229b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xupublic: 2303c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek CFGTemporaryDtor(CXXBindTemporaryExpr *expr) 2313c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek : CFGImplicitDtor(TemporaryDtor, expr, 0) {} 2328599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski 2333c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek const CXXBindTemporaryExpr *getBindTemporaryExpr() const { 2343c0349e87cdbd7316d06d2411d86ee1086e717a5Ted Kremenek return static_cast<const CXXBindTemporaryExpr *>(Data1.getPointer()); 2358599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski } 2368599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski 237fdf6a279c9a75c778eba382d9a156697092982a1David Blaikieprivate: 238fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie friend class CFGElement; 239fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie CFGTemporaryDtor() {} 240fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie static bool isKind(const CFGElement &E) { 241fdf6a279c9a75c778eba382d9a156697092982a1David Blaikie return E.getKind() == TemporaryDtor; 242b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 243852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek}; 244852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek 2454ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// CFGTerminator - Represents CFGBlock terminator statement. 2464ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// 2474ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// TemporaryDtorsBranch bit is set to true if the terminator marks a branch 2484ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// in control flow of destructors of temporaries. In this case terminator 2494ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// statement is the same statement that branches control flow in evaluation 2504ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// of matching full expression. 2514ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderskiclass CFGTerminator { 2524ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski llvm::PointerIntPair<Stmt *, 1> Data; 2534ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderskipublic: 2544ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski CFGTerminator() {} 2554ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski CFGTerminator(Stmt *S, bool TemporaryDtorsBranch = false) 2564ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski : Data(S, TemporaryDtorsBranch) {} 2574ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 2584ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski Stmt *getStmt() { return Data.getPointer(); } 2594ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski const Stmt *getStmt() const { return Data.getPointer(); } 2604ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 2614ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski bool isTemporaryDtorsBranch() const { return Data.getInt(); } 2624ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 2634ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski operator Stmt *() { return getStmt(); } 2644ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski operator const Stmt *() const { return getStmt(); } 2654ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 2664ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski Stmt *operator->() { return getStmt(); } 2674ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski const Stmt *operator->() const { return getStmt(); } 2684ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 2694ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski Stmt &operator*() { return *getStmt(); } 2704ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski const Stmt &operator*() const { return *getStmt(); } 2714ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 2727247c88d1e41514a41085f83ebf03dd5220e054aDavid Blaikie LLVM_EXPLICIT operator bool() const { return getStmt(); } 2734ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski}; 2744ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 275fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFGBlock - Represents a single basic block in a source-level CFG. 276fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// It consists of: 277fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 278fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// (1) A set of statements/expressions (which may contain subexpressions). 279fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// (2) A "terminator" statement (not in the set of statements). 280fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// (3) A list of successors and predecessors. 281fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 282fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Terminator: The terminator represents the type of control-flow that occurs 283fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// at the end of the basic block. The terminator is a Stmt* referring to an 284fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// AST node that has control-flow: if-statements, breaks, loops, etc. 285fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// If the control-flow is conditional, the condition expression will appear 286fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// within the set of statements in the block (usually the last statement). 287fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 288fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Predecessors: the order in the set of predecessors is arbitrary. 289fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 290fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Successors: the order in the set of successors is NOT arbitrary. We 291fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// currently have the following orderings based on the terminator: 292fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 293fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Terminator Successor Ordering 294fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// ----------------------------------------------------- 295fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// if Then Block; Else Block 2969cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek/// ? operator LHS expression; RHS expression 2979cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek/// &&, || expression that uses result of && or ||, RHS 298fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 2993cda937d4c015ff6070f1117024621a452cfadddTed Kremenek/// But note that any of that may be NULL in case of optimized-out edges. 3003cda937d4c015ff6070f1117024621a452cfadddTed Kremenek/// 301fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenekclass CFGBlock { 302b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu class ElementList { 303852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef BumpVector<CFGElement> ImplTy; 3046c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek ImplTy Impl; 3056c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek public: 306b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu ElementList(BumpVectorContext &C) : Impl(C, 4) {} 307ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 3086c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek typedef std::reverse_iterator<ImplTy::iterator> iterator; 3096c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek typedef std::reverse_iterator<ImplTy::const_iterator> const_iterator; 3106c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek typedef ImplTy::iterator reverse_iterator; 311ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie typedef ImplTy::const_iterator const_reverse_iterator; 312298038352b34c5503db418201f3ddea6e56fd0e1David Blaikie typedef ImplTy::const_reference const_reference; 313ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 314852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek void push_back(CFGElement e, BumpVectorContext &C) { Impl.push_back(e, C); } 31553de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski reverse_iterator insert(reverse_iterator I, size_t Cnt, CFGElement E, 3169c378f705405d37f49795d5e915989de774fe11fTed Kremenek BumpVectorContext &C) { 31753de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski return Impl.insert(I, Cnt, E, C); 31853de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski } 31953de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski 320298038352b34c5503db418201f3ddea6e56fd0e1David Blaikie const_reference front() const { return Impl.back(); } 321298038352b34c5503db418201f3ddea6e56fd0e1David Blaikie const_reference back() const { return Impl.front(); } 322ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 3236c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek iterator begin() { return Impl.rbegin(); } 3246c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek iterator end() { return Impl.rend(); } 3256c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek const_iterator begin() const { return Impl.rbegin(); } 3266c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek const_iterator end() const { return Impl.rend(); } 3276c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek reverse_iterator rbegin() { return Impl.begin(); } 3286c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek reverse_iterator rend() { return Impl.end(); } 3296c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek const_reverse_iterator rbegin() const { return Impl.begin(); } 3306c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek const_reverse_iterator rend() const { return Impl.end(); } 3316c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek 332852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGElement operator[](size_t i) const { 3336c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek assert(i < Impl.size()); 3346c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek return Impl[Impl.size() - 1 - i]; 3356c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek } 336ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 3376c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek size_t size() const { return Impl.size(); } 3386c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek bool empty() const { return Impl.empty(); } 3396c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek }; 3406c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek 341fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// Stmts - The set of statements in the basic block. 342b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu ElementList Elements; 3439cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek 3449cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek /// Label - An (optional) label that prefixes the executable 3459cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek /// statements in the block. When this variable is non-NULL, it is 3464c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump /// either an instance of LabelStmt, SwitchCase or CXXCatchStmt. 3473575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Stmt *Label; 3481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3499cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek /// Terminator - The terminator for a basic block that 350fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// indicates the type of control-flow that occurs between a block 351fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// and its successors. 3524ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski CFGTerminator Terminator; 3531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3543575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek /// LoopTarget - Some blocks are used to represent the "loop edge" to 3553575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek /// the start of a loop from within the loop body. This Stmt* will be 3563575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek /// refer to the loop statement for such blocks (and be null otherwise). 3571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const Stmt *LoopTarget; 3581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 359fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// BlockID - A numerical ID assigned to a CFGBlock during construction 360fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// of the CFG. 361fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned BlockID; 3621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 363fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// Predecessors/Successors - Keep track of the predecessor / successor 364fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek /// CFG blocks. 365ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek typedef BumpVector<CFGBlock*> AdjacentBlocks; 366fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek AdjacentBlocks Preds; 367fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek AdjacentBlocks Succs; 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 36983754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// NoReturn - This bit is set when the basic block contains a function call 37083754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// or implicit destructor that is attributed as 'noreturn'. In that case, 37183754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// control cannot technically ever proceed past this block. All such blocks 37283754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// will have a single immediate successor: the exit block. This allows them 37383754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// to be easily reached from the exit block and using this bit quickly 37483754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// recognized without scanning the contents of the block. 37583754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// 37683754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// Optimization Note: This bit could be profitably folded with Terminator's 37783754162f698a5dafad93fb89be0953651a604d0Chandler Carruth /// storage if the memory usage of CFGBlock becomes an issue. 37883754162f698a5dafad93fb89be0953651a604d0Chandler Carruth unsigned HasNoReturnElement : 1; 37983754162f698a5dafad93fb89be0953651a604d0Chandler Carruth 38002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// Parent - The parent CFG that owns this CFGBlock. 38102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks CFG *Parent; 38202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 383fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenekpublic: 38402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks explicit CFGBlock(unsigned blockid, BumpVectorContext &C, CFG *parent) 38502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks : Elements(C), Label(NULL), Terminator(NULL), LoopTarget(NULL), 38602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks BlockID(blockid), Preds(C, 1), Succs(C, 1), HasNoReturnElement(false), 38702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks Parent(parent) {} 3887177dee8aee4b432911c91f1b788963bec0cac9fDaniel Dunbar ~CFGBlock() {} 389fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 390fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // Statement iterators 391b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu typedef ElementList::iterator iterator; 392b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu typedef ElementList::const_iterator const_iterator; 393b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu typedef ElementList::reverse_iterator reverse_iterator; 394b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu typedef ElementList::const_reverse_iterator const_reverse_iterator; 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 396b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGElement front() const { return Elements.front(); } 397b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGElement back() const { return Elements.back(); } 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 399b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu iterator begin() { return Elements.begin(); } 400b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu iterator end() { return Elements.end(); } 401b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu const_iterator begin() const { return Elements.begin(); } 402b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu const_iterator end() const { return Elements.end(); } 403fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 404b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu reverse_iterator rbegin() { return Elements.rbegin(); } 405b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu reverse_iterator rend() { return Elements.rend(); } 406b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu const_reverse_iterator rbegin() const { return Elements.rbegin(); } 407b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu const_reverse_iterator rend() const { return Elements.rend(); } 4081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 409b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu unsigned size() const { return Elements.size(); } 410b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu bool empty() const { return Elements.empty(); } 411be7a7d6f2e5b86807afd08a568863df973baaa38Ted Kremenek 412b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGElement operator[](size_t i) const { return Elements[i]; } 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 414fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // CFG iterators 415fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::iterator pred_iterator; 416fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::const_iterator const_pred_iterator; 417fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::reverse_iterator pred_reverse_iterator; 418fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::const_reverse_iterator const_pred_reverse_iterator; 419fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 420fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::iterator succ_iterator; 421fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::const_iterator const_succ_iterator; 422fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::reverse_iterator succ_reverse_iterator; 423fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek typedef AdjacentBlocks::const_reverse_iterator const_succ_reverse_iterator; 4241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 425fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek pred_iterator pred_begin() { return Preds.begin(); } 426fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek pred_iterator pred_end() { return Preds.end(); } 427fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_pred_iterator pred_begin() const { return Preds.begin(); } 428fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_pred_iterator pred_end() const { return Preds.end(); } 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 430fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek pred_reverse_iterator pred_rbegin() { return Preds.rbegin(); } 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump pred_reverse_iterator pred_rend() { return Preds.rend(); } 432fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_pred_reverse_iterator pred_rbegin() const { return Preds.rbegin(); } 433fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_pred_reverse_iterator pred_rend() const { return Preds.rend(); } 434fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump succ_iterator succ_begin() { return Succs.begin(); } 436fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek succ_iterator succ_end() { return Succs.end(); } 437fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_succ_iterator succ_begin() const { return Succs.begin(); } 4381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const_succ_iterator succ_end() const { return Succs.end(); } 4391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 440fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek succ_reverse_iterator succ_rbegin() { return Succs.rbegin(); } 441fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek succ_reverse_iterator succ_rend() { return Succs.rend(); } 442fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_succ_reverse_iterator succ_rbegin() const { return Succs.rbegin(); } 443fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek const_succ_reverse_iterator succ_rend() const { return Succs.rend(); } 444fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 445fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned succ_size() const { return Succs.size(); } 446fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek bool succ_empty() const { return Succs.empty(); } 447fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 448fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned pred_size() const { return Preds.size(); } 449fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek bool pred_empty() const { return Preds.empty(); } 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 451ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 452ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek class FilterOptions { 453ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek public: 454ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek FilterOptions() { 455ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek IgnoreDefaultsWithCoveredEnums = 0; 456be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek } 457ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 458ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek unsigned IgnoreDefaultsWithCoveredEnums : 1; 459ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek }; 460ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 461ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek static bool FilterEdge(const FilterOptions &F, const CFGBlock *Src, 462be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const CFGBlock *Dst); 463ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 464ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek template <typename IMPL, bool IsPred> 465ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek class FilteredCFGBlockIterator { 466ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek private: 467ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek IMPL I, E; 468ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek const FilterOptions F; 469ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek const CFGBlock *From; 470ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek public: 471ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek explicit FilteredCFGBlockIterator(const IMPL &i, const IMPL &e, 472be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const CFGBlock *from, 473be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const FilterOptions &f) 474ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek : I(i), E(e), F(f), From(from) {} 475ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 476ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek bool hasMore() const { return I != E; } 477ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 478ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek FilteredCFGBlockIterator &operator++() { 479ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek do { ++I; } while (hasMore() && Filter(*I)); 480ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek return *this; 481ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 482ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 483ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek const CFGBlock *operator*() const { return *I; } 484ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek private: 485ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek bool Filter(const CFGBlock *To) { 486ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek return IsPred ? FilterEdge(F, To, From) : FilterEdge(F, From, To); 487ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 488ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek }; 489ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 490ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek typedef FilteredCFGBlockIterator<const_pred_iterator, true> 491ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek filtered_pred_iterator; 492ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 493ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek typedef FilteredCFGBlockIterator<const_succ_iterator, false> 494ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek filtered_succ_iterator; 495ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 496ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek filtered_pred_iterator filtered_pred_start_end(const FilterOptions &f) const { 497ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek return filtered_pred_iterator(pred_begin(), pred_end(), this, f); 498ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 499ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 500ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek filtered_succ_iterator filtered_succ_start_end(const FilterOptions &f) const { 501ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek return filtered_succ_iterator(succ_begin(), succ_end(), this, f); 502ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 503ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 504fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // Manipulation of block contents 5051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5069c378f705405d37f49795d5e915989de774fe11fTed Kremenek void setTerminator(Stmt *Statement) { Terminator = Statement; } 5079c378f705405d37f49795d5e915989de774fe11fTed Kremenek void setLabel(Stmt *Statement) { Label = Statement; } 5083575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek void setLoopTarget(const Stmt *loopTarget) { LoopTarget = loopTarget; } 50983754162f698a5dafad93fb89be0953651a604d0Chandler Carruth void setHasNoReturnElement() { HasNoReturnElement = true; } 5109cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek 5114ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski CFGTerminator getTerminator() { return Terminator; } 5124ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski const CFGTerminator getTerminator() const { return Terminator; } 5131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5149c378f705405d37f49795d5e915989de774fe11fTed Kremenek Stmt *getTerminatorCondition(); 5151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5169c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Stmt *getTerminatorCondition() const { 517411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return const_cast<CFGBlock*>(this)->getTerminatorCondition(); 518411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5203575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek const Stmt *getLoopTarget() const { return LoopTarget; } 5211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5229c378f705405d37f49795d5e915989de774fe11fTed Kremenek Stmt *getLabel() { return Label; } 5239c378f705405d37f49795d5e915989de774fe11fTed Kremenek const Stmt *getLabel() const { return Label; } 5241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52583754162f698a5dafad93fb89be0953651a604d0Chandler Carruth bool hasNoReturnElement() const { return HasNoReturnElement; } 52683754162f698a5dafad93fb89be0953651a604d0Chandler Carruth 527fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned getBlockID() const { return BlockID; } 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks CFG *getParent() const { return Parent; } 53002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 531682060c5d95f6e4f79536013781ab0870cdd3850Ted Kremenek void dump(const CFG *cfg, const LangOptions &LO, bool ShowColors = false) const; 532682060c5d95f6e4f79536013781ab0870cdd3850Ted Kremenek void print(raw_ostream &OS, const CFG* cfg, const LangOptions &LO, 533682060c5d95f6e4f79536013781ab0870cdd3850Ted Kremenek bool ShowColors) const; 5348cc488fefb2fb04bc8d5398da29f0182f97934cfChris Lattner void printTerminator(raw_ostream &OS, const LangOptions &LO) const; 535ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 5369c378f705405d37f49795d5e915989de774fe11fTed Kremenek void addSuccessor(CFGBlock *Block, BumpVectorContext &C) { 537ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (Block) 538ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Block->Preds.push_back(this, C); 539ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Succs.push_back(Block, C); 540ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 541ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 5429c378f705405d37f49795d5e915989de774fe11fTed Kremenek void appendStmt(Stmt *statement, BumpVectorContext &C) { 543892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Elements.push_back(CFGStmt(statement), C); 544079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 54582bc3fd823d85ee3ef9a641c0975b6ad25f55047Marcin Swiderski 546cbb67480094b3bcb5b715acd827cbad55e2a204cSean Hunt void appendInitializer(CXXCtorInitializer *initializer, 5479c378f705405d37f49795d5e915989de774fe11fTed Kremenek BumpVectorContext &C) { 548892697dd2287caf7c29aaaa82909b0e90b8b63feTed Kremenek Elements.push_back(CFGInitializer(initializer), C); 54982bc3fd823d85ee3ef9a641c0975b6ad25f55047Marcin Swiderski } 55082bc3fd823d85ee3ef9a641c0975b6ad25f55047Marcin Swiderski 5517c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski void appendBaseDtor(const CXXBaseSpecifier *BS, BumpVectorContext &C) { 5527c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski Elements.push_back(CFGBaseDtor(BS), C); 5537c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski } 5547c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski 5557c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski void appendMemberDtor(FieldDecl *FD, BumpVectorContext &C) { 5567c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski Elements.push_back(CFGMemberDtor(FD), C); 5577c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski } 558ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 5598599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski void appendTemporaryDtor(CXXBindTemporaryExpr *E, BumpVectorContext &C) { 5608599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski Elements.push_back(CFGTemporaryDtor(E), C); 5618599e7677e067fd01d3b2ee4c0875747d367fd8eMarcin Swiderski } 5627c625d8ffc20b92fff9e1690cd2484fcb6498183Marcin Swiderski 563c8cfc74bdcc999828bc232294d937fb191940d5bChandler Carruth void appendAutomaticObjDtor(VarDecl *VD, Stmt *S, BumpVectorContext &C) { 564c8cfc74bdcc999828bc232294d937fb191940d5bChandler Carruth Elements.push_back(CFGAutomaticObjDtor(VD, S), C); 565c8cfc74bdcc999828bc232294d937fb191940d5bChandler Carruth } 566c8cfc74bdcc999828bc232294d937fb191940d5bChandler Carruth 56753de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski // Destructors must be inserted in reversed order. So insertion is in two 56853de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski // steps. First we prepare space for some number of elements, then we insert 56953de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski // the elements beginning at the last position in prepared space. 57053de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski iterator beginAutomaticObjDtorsInsert(iterator I, size_t Cnt, 5719c378f705405d37f49795d5e915989de774fe11fTed Kremenek BumpVectorContext &C) { 572b07805485c603be3d8011f72611465324c9e664bDavid Blaikie return iterator(Elements.insert(I.base(), Cnt, CFGAutomaticObjDtor(0, 0), C)); 57353de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski } 5749c378f705405d37f49795d5e915989de774fe11fTed Kremenek iterator insertAutomaticObjDtor(iterator I, VarDecl *VD, Stmt *S) { 57553de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski *I = CFGAutomaticObjDtor(VD, S); 57653de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski return ++I; 57753de134e7b4686eed40bc031438d8a4560a2cda4Marcin Swiderski } 578fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek}; 5791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 580fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFG - Represents a source-level, intra-procedural CFG that represents the 581fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// control-flow of a Stmt. The Stmt can represent an entire function body, 582fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// or a single expression. A CFG will always contain one empty block that 583fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// represents the Exit point of the CFG. A CFG will also contain a designated 584fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Entry block. The CFG solely represents control-flow; it consists of 585fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFGBlocks which are simply containers of Stmt*'s in the AST the CFG 586fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// was constructed from. 587fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenekclass CFG { 588fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenekpublic: 589a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 590a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek // CFG Construction & Manipulation. 591a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 592a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 5936c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek class BuildOptions { 594681ab8998793899076bae9cd6383a5d78b8ee1acBenjamin Kramer std::bitset<Stmt::lastStmtConstant> alwaysAddMask; 5956c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek public: 5960d28d360b5559abda755e50b855ba5e59727d9cdTed Kremenek typedef llvm::DenseMap<const Stmt *, const CFGBlock*> ForcedBlkExprs; 597ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie ForcedBlkExprs **forcedBlkExprs; 598b8ad5ee345fa1fdd1fa9253f2d01f69becc88a04Ted Kremenek 599bc5cb8a5fe2b88f917d47ceb58b53696a121e57eTed Kremenek bool PruneTriviallyFalseEdges; 600bc5cb8a5fe2b88f917d47ceb58b53696a121e57eTed Kremenek bool AddEHEdges; 601bc5cb8a5fe2b88f917d47ceb58b53696a121e57eTed Kremenek bool AddInitializers; 602bc5cb8a5fe2b88f917d47ceb58b53696a121e57eTed Kremenek bool AddImplicitDtors; 6035a1ffe98b04120846a15f7105905b5f363b08635Jordan Rose bool AddTemporaryDtors; 604fbd4b5dc7febd1d8b4fa64ab00a29d72b44bec7bTed Kremenek bool AddStaticInitBranches; 605ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 60674fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek bool alwaysAdd(const Stmt *stmt) const { 60774fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek return alwaysAddMask[stmt->getStmtClass()]; 60874fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek } 609ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 610882998923889a2fcce9b49696506c499e22cf38fTed Kremenek BuildOptions &setAlwaysAdd(Stmt::StmtClass stmtClass, bool val = true) { 611882998923889a2fcce9b49696506c499e22cf38fTed Kremenek alwaysAddMask[stmtClass] = val; 612882998923889a2fcce9b49696506c499e22cf38fTed Kremenek return *this; 613882998923889a2fcce9b49696506c499e22cf38fTed Kremenek } 614ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 615882998923889a2fcce9b49696506c499e22cf38fTed Kremenek BuildOptions &setAllAlwaysAdd() { 616882998923889a2fcce9b49696506c499e22cf38fTed Kremenek alwaysAddMask.set(); 617bc5cb8a5fe2b88f917d47ceb58b53696a121e57eTed Kremenek return *this; 61874fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek } 6196c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek 6206c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek BuildOptions() 621681ab8998793899076bae9cd6383a5d78b8ee1acBenjamin Kramer : forcedBlkExprs(0), PruneTriviallyFalseEdges(true) 62274fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek ,AddEHEdges(false) 62374fb1a493cf5d2dd0fb51a4eadf74e85e10a3457Ted Kremenek ,AddInitializers(false) 6245a1ffe98b04120846a15f7105905b5f363b08635Jordan Rose ,AddImplicitDtors(false) 625fbd4b5dc7febd1d8b4fa64ab00a29d72b44bec7bTed Kremenek ,AddTemporaryDtors(false) 626fbd4b5dc7febd1d8b4fa64ab00a29d72b44bec7bTed Kremenek ,AddStaticInitBranches(false) {} 6276c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek }; 6286c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek 62902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// \brief Provides a custom implementation of the iterator class to have the 63002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// same interface as Function::iterator - iterator returns CFGBlock 63102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// (not a pointer to CFGBlock). 63202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks class graph_iterator { 63302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks public: 63402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef const CFGBlock value_type; 63502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef value_type& reference; 63602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef value_type* pointer; 63702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef BumpVector<CFGBlock*>::iterator ImplTy; 63802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 63902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks graph_iterator(const ImplTy &i) : I(i) {} 64002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 64102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks bool operator==(const graph_iterator &X) const { return I == X.I; } 64202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks bool operator!=(const graph_iterator &X) const { return I != X.I; } 64302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 64402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks reference operator*() const { return **I; } 64502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks pointer operator->() const { return *I; } 64602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks operator CFGBlock* () { return *I; } 64702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 64802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks graph_iterator &operator++() { ++I; return *this; } 64902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks graph_iterator &operator--() { --I; return *this; } 65002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 65102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks private: 65202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks ImplTy I; 65302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks }; 65402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 65502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks class const_graph_iterator { 65602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks public: 65702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef const CFGBlock value_type; 65802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef value_type& reference; 65902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef value_type* pointer; 66002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef BumpVector<CFGBlock*>::const_iterator ImplTy; 66102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 66202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks const_graph_iterator(const ImplTy &i) : I(i) {} 66302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 66402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks bool operator==(const const_graph_iterator &X) const { return I == X.I; } 66502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks bool operator!=(const const_graph_iterator &X) const { return I != X.I; } 66602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 66702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks reference operator*() const { return **I; } 66802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks pointer operator->() const { return *I; } 66902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks operator CFGBlock* () const { return *I; } 67002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 67102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks const_graph_iterator &operator++() { ++I; return *this; } 67202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks const_graph_iterator &operator--() { --I; return *this; } 67302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 67402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks private: 67502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks ImplTy I; 67602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks }; 67702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 678a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek /// buildCFG - Builds a CFG from an AST. The responsibility to free the 6791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump /// constructed CFG belongs to the caller. 6809c378f705405d37f49795d5e915989de774fe11fTed Kremenek static CFG* buildCFG(const Decl *D, Stmt *AST, ASTContext *C, 681b8ad5ee345fa1fdd1fa9253f2d01f69becc88a04Ted Kremenek const BuildOptions &BO); 6821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 683a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek /// createBlock - Create a new block in the CFG. The CFG owns the block; 684a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek /// the caller should not directly free it. 6859c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock *createBlock(); 6861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 687a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek /// setEntry - Set the entry block of the CFG. This is typically used 688a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek /// only during CFG construction. Most CFG clients expect that the 689a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek /// entry block has no predecessors and contains no statements. 690a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek void setEntry(CFGBlock *B) { Entry = B; } 6911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 692e38158de9236dfcded7da56126134e5e3e49cb01Ted Kremenek /// setIndirectGotoBlock - Set the block used for indirect goto jumps. 693e38158de9236dfcded7da56126134e5e3e49cb01Ted Kremenek /// This is typically used only during CFG construction. 6949c378f705405d37f49795d5e915989de774fe11fTed Kremenek void setIndirectGotoBlock(CFGBlock *B) { IndirectGotoBlock = B; } 6951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 696a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 697a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek // Block Iterators 698a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 699a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 700ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie typedef BumpVector<CFGBlock*> CFGBlockListTy; 701a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek typedef CFGBlockListTy::iterator iterator; 702a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek typedef CFGBlockListTy::const_iterator const_iterator; 703a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek typedef std::reverse_iterator<iterator> reverse_iterator; 704a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 705fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 7069c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock & front() { return *Blocks.front(); } 7079c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock & back() { return *Blocks.back(); } 7081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 70919bb356317952445b03ee341c02f6147083c9eeaTed Kremenek iterator begin() { return Blocks.begin(); } 71019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek iterator end() { return Blocks.end(); } 71119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek const_iterator begin() const { return Blocks.begin(); } 7121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const_iterator end() const { return Blocks.end(); } 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks graph_iterator nodes_begin() { return graph_iterator(Blocks.begin()); } 71502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks graph_iterator nodes_end() { return graph_iterator(Blocks.end()); } 71602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks const_graph_iterator nodes_begin() const { 71702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return const_graph_iterator(Blocks.begin()); 71802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks } 71902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks const_graph_iterator nodes_end() const { 72002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return const_graph_iterator(Blocks.end()); 72102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks } 72202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 72319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek reverse_iterator rbegin() { return Blocks.rbegin(); } 72419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek reverse_iterator rend() { return Blocks.rend(); } 72519bb356317952445b03ee341c02f6147083c9eeaTed Kremenek const_reverse_iterator rbegin() const { return Blocks.rbegin(); } 72619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek const_reverse_iterator rend() const { return Blocks.rend(); } 7271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7289c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock & getEntry() { return *Entry; } 7299c378f705405d37f49795d5e915989de774fe11fTed Kremenek const CFGBlock & getEntry() const { return *Entry; } 7309c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock & getExit() { return *Exit; } 7319c378f705405d37f49795d5e915989de774fe11fTed Kremenek const CFGBlock & getExit() const { return *Exit; } 7327dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 7339c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock * getIndirectGotoBlock() { return IndirectGotoBlock; } 7349c378f705405d37f49795d5e915989de774fe11fTed Kremenek const CFGBlock * getIndirectGotoBlock() const { return IndirectGotoBlock; } 735ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 736f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek typedef std::vector<const CFGBlock*>::const_iterator try_block_iterator; 737f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek try_block_iterator try_blocks_begin() const { 738f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek return TryDispatchBlocks.begin(); 739f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek } 740f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek try_block_iterator try_blocks_end() const { 741f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek return TryDispatchBlocks.end(); 742f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek } 743ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 744f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek void addTryDispatchBlock(const CFGBlock *block) { 745f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek TryDispatchBlocks.push_back(block); 746f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek } 7471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 748a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 749a90b0d1e585d993621a342d0b2874e61941372d5Ted Kremenek // Member templates useful for various batch operations over CFGs. 750a90b0d1e585d993621a342d0b2874e61941372d5Ted Kremenek //===--------------------------------------------------------------------===// 7511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 752a90b0d1e585d993621a342d0b2874e61941372d5Ted Kremenek template <typename CALLBACK> 753a90b0d1e585d993621a342d0b2874e61941372d5Ted Kremenek void VisitBlockStmts(CALLBACK& O) const { 754a90b0d1e585d993621a342d0b2874e61941372d5Ted Kremenek for (const_iterator I=begin(), E=end(); I != E; ++I) 755ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::const_iterator BI=(*I)->begin(), BE=(*I)->end(); 756b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu BI != BE; ++BI) { 757b07805485c603be3d8011f72611465324c9e664bDavid Blaikie if (Optional<CFGStmt> stmt = BI->getAs<CFGStmt>()) 758b07805485c603be3d8011f72611465324c9e664bDavid Blaikie O(const_cast<Stmt*>(stmt->getStmt())); 759b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 7611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 762a90b0d1e585d993621a342d0b2874e61941372d5Ted Kremenek //===--------------------------------------------------------------------===// 763a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek // CFG Introspection. 764a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 765a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 76663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek struct BlkExprNumTy { 76763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek const signed Idx; 76863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek explicit BlkExprNumTy(signed idx) : Idx(idx) {} 76963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek explicit BlkExprNumTy() : Idx(-1) {} 77063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek operator bool() const { return Idx >= 0; } 77163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek operator unsigned() const { assert(Idx >=0); return (unsigned) Idx; } 77263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek }; 7731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7749c378f705405d37f49795d5e915989de774fe11fTed Kremenek bool isBlkExpr(const Stmt *S) { return getBlkExprNum(S); } 775200fbc877d50da9e53b9aa272b70ca3538ce3a66Ted Kremenek bool isBlkExpr(const Stmt *S) const { 776200fbc877d50da9e53b9aa272b70ca3538ce3a66Ted Kremenek return const_cast<CFG*>(this)->isBlkExpr(S); 777200fbc877d50da9e53b9aa272b70ca3538ce3a66Ted Kremenek } 7789c378f705405d37f49795d5e915989de774fe11fTed Kremenek BlkExprNumTy getBlkExprNum(const Stmt *S); 77963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek unsigned getNumBlkExprs(); 7801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7810c8c5365be0176e8399e97d7da3293c79bc9da24Mike Stump /// getNumBlockIDs - Returns the total number of BlockIDs allocated (which 7820c8c5365be0176e8399e97d7da3293c79bc9da24Mike Stump /// start at 0). 7839438252ad2ecae5338df565ca33c6969e4fbfa41Ted Kremenek unsigned getNumBlockIDs() const { return NumBlockIDs; } 784a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 78502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// size - Return the total number of CFGBlocks within the CFG 78602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// This is simply a renaming of the getNumBlockIDs(). This is necessary 78702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks /// because the dominator implementation needs such an interface. 78802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks unsigned size() const { return NumBlockIDs; } 78902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 790a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 791a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek // CFG Debugging: Pretty-Printing and Visualization. 792a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 793a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 794e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner void viewCFG(const LangOptions &LO) const; 795682060c5d95f6e4f79536013781ab0870cdd3850Ted Kremenek void print(raw_ostream &OS, const LangOptions &LO, bool ShowColors) const; 796682060c5d95f6e4f79536013781ab0870cdd3850Ted Kremenek void dump(const LangOptions &LO, bool ShowColors) const; 797a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 798a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 799a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek // Internal: constructors and data. 800a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek //===--------------------------------------------------------------------===// 801a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek 8021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CFG() : Entry(NULL), Exit(NULL), IndirectGotoBlock(NULL), NumBlockIDs(0), 8037177dee8aee4b432911c91f1b788963bec0cac9fDaniel Dunbar BlkExprMap(NULL), Blocks(BlkBVC, 10) {} 8041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek ~CFG(); 8061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 807ce1eb34bbea1e0408f1952776d7d52ccde1bd275Ted Kremenek llvm::BumpPtrAllocator& getAllocator() { 808ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek return BlkBVC.getAllocator(); 809ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 810ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 811ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek BumpVectorContext &getBumpVectorContext() { 812ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek return BlkBVC; 813ce1eb34bbea1e0408f1952776d7d52ccde1bd275Ted Kremenek } 8141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 815a36c6540346266f570b2fc7457950dea45d89988Ted Kremenekprivate: 8169c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock *Entry; 8179c378f705405d37f49795d5e915989de774fe11fTed Kremenek CFGBlock *Exit; 818a36c6540346266f570b2fc7457950dea45d89988Ted Kremenek CFGBlock* IndirectGotoBlock; // Special block to contain collective dispatch 819ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek // for indirect gotos 82063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek unsigned NumBlockIDs; 8211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 82286d1777a6b7723865c1e67a7aafc797ec0a574ffTed Kremenek // BlkExprMap - An opaque pointer to prevent inclusion of DenseMap.h. 8231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // It represents a map from Expr* to integers to record the set of 82486d1777a6b7723865c1e67a7aafc797ec0a574ffTed Kremenek // block-level expressions and their "statement number" in the CFG. 8259c378f705405d37f49795d5e915989de774fe11fTed Kremenek void * BlkExprMap; 826ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 827ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek BumpVectorContext BlkBVC; 828ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 829ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek CFGBlockListTy Blocks; 830ba243b59a1074e0962f6abfa3bb9aa984eac1245David Blaikie 831f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek /// C++ 'try' statements are modeled with an indirect dispatch block. 832f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek /// This is the collection of such blocks present in the CFG. 833f0e71aede7ccf3e311feac6a414c431f7a0fc3c8Ted Kremenek std::vector<const CFGBlock *> TryDispatchBlocks; 8341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 835fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek}; 836fa2be43dbd6fdc4414e261db69aaf35dfb21a416Ted Kremenek} // end namespace clang 8377dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 8387dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 8397dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// GraphTraits specializations for CFG basic block graphs (source-level CFGs) 8407dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 8417dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 8427dba8607e59096014b7139ff20ef00870041d518Ted Kremeneknamespace llvm { 8437dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 8444ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// Implement simplify_type for CFGTerminator, so that we can dyn_cast from 8454ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski/// CFGTerminator to a specific Stmt class. 8464ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderskitemplate <> struct simplify_type< ::clang::CFGTerminator> { 8474ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski typedef ::clang::Stmt *SimpleType; 84894cf910ac2d1719c1dfc163bbec3953f12efdf6fRafael Espindola static SimpleType getSimplifiedValue(::clang::CFGTerminator Val) { 849e81fdb1fdde48d3fa18df56c5797f6b0bc5dfc4aRafael Espindola return Val.getStmt(); 8504ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski } 8514ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski}; 8524ba72a0b28135209c435630682febe1f854ccfa6Marcin Swiderski 8537dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// Traits for: CFGBlock 8547dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 8559c378f705405d37f49795d5e915989de774fe11fTed Kremenektemplate <> struct GraphTraits< ::clang::CFGBlock *> { 856852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef ::clang::CFGBlock NodeType; 857852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef ::clang::CFGBlock::succ_iterator ChildIteratorType; 8581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8599c378f705405d37f49795d5e915989de774fe11fTed Kremenek static NodeType* getEntryNode(::clang::CFGBlock *BB) 8607dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return BB; } 8617dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 8627dba8607e59096014b7139ff20ef00870041d518Ted Kremenek static inline ChildIteratorType child_begin(NodeType* N) 8637dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return N->succ_begin(); } 8641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8657dba8607e59096014b7139ff20ef00870041d518Ted Kremenek static inline ChildIteratorType child_end(NodeType* N) 8667dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return N->succ_end(); } 8677dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 8687dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 8699c378f705405d37f49795d5e915989de774fe11fTed Kremenektemplate <> struct GraphTraits< const ::clang::CFGBlock *> { 870852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef const ::clang::CFGBlock NodeType; 871852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef ::clang::CFGBlock::const_succ_iterator ChildIteratorType; 8721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8739c378f705405d37f49795d5e915989de774fe11fTed Kremenek static NodeType* getEntryNode(const clang::CFGBlock *BB) 8747dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return BB; } 8751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8767dba8607e59096014b7139ff20ef00870041d518Ted Kremenek static inline ChildIteratorType child_begin(NodeType* N) 8777dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return N->succ_begin(); } 8781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8797dba8607e59096014b7139ff20ef00870041d518Ted Kremenek static inline ChildIteratorType child_end(NodeType* N) 8807dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return N->succ_end(); } 8817dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 8827dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 88302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zakstemplate <> struct GraphTraits<Inverse< ::clang::CFGBlock*> > { 88402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef ::clang::CFGBlock NodeType; 88502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef ::clang::CFGBlock::const_pred_iterator ChildIteratorType; 88602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 88702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static NodeType *getEntryNode(Inverse< ::clang::CFGBlock*> G) 88802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks { return G.Graph; } 88902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 89002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static inline ChildIteratorType child_begin(NodeType* N) 89102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks { return N->pred_begin(); } 89202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 89302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static inline ChildIteratorType child_end(NodeType* N) 89402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks { return N->pred_end(); } 89502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks}; 89602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 897852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenektemplate <> struct GraphTraits<Inverse<const ::clang::CFGBlock*> > { 898852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef const ::clang::CFGBlock NodeType; 899852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek typedef ::clang::CFGBlock::const_pred_iterator ChildIteratorType; 9007dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 901852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek static NodeType *getEntryNode(Inverse<const ::clang::CFGBlock*> G) 9027dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return G.Graph; } 9037dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 9047dba8607e59096014b7139ff20ef00870041d518Ted Kremenek static inline ChildIteratorType child_begin(NodeType* N) 9057dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return N->pred_begin(); } 9061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9077dba8607e59096014b7139ff20ef00870041d518Ted Kremenek static inline ChildIteratorType child_end(NodeType* N) 9087dba8607e59096014b7139ff20ef00870041d518Ted Kremenek { return N->pred_end(); } 9097dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 9107dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 9117dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// Traits for: CFG 9127dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 913852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenektemplate <> struct GraphTraits< ::clang::CFG* > 9149c378f705405d37f49795d5e915989de774fe11fTed Kremenek : public GraphTraits< ::clang::CFGBlock *> { 9157dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 91602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef ::clang::CFG::graph_iterator nodes_iterator; 9171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 91802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static NodeType *getEntryNode(::clang::CFG* F) { return &F->getEntry(); } 91902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static nodes_iterator nodes_begin(::clang::CFG* F) { return F->nodes_begin();} 92002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static nodes_iterator nodes_end(::clang::CFG* F) { return F->nodes_end(); } 92102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static unsigned size(::clang::CFG* F) { return F->size(); } 9227dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 9237dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 924852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenektemplate <> struct GraphTraits<const ::clang::CFG* > 9259c378f705405d37f49795d5e915989de774fe11fTed Kremenek : public GraphTraits<const ::clang::CFGBlock *> { 9267dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 92702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef ::clang::CFG::const_graph_iterator nodes_iterator; 9287dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 929852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek static NodeType *getEntryNode( const ::clang::CFG* F) { 930852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return &F->getEntry(); 931852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 932852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek static nodes_iterator nodes_begin( const ::clang::CFG* F) { 93302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return F->nodes_begin(); 934852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 935852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek static nodes_iterator nodes_end( const ::clang::CFG* F) { 93602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return F->nodes_end(); 937852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 93802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static unsigned size(const ::clang::CFG* F) { 93902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return F->size(); 94002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks } 94102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks}; 94202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 94302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zakstemplate <> struct GraphTraits<Inverse< ::clang::CFG*> > 94402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks : public GraphTraits<Inverse< ::clang::CFGBlock*> > { 94502f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 94602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef ::clang::CFG::graph_iterator nodes_iterator; 94702f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks 94802f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static NodeType *getEntryNode( ::clang::CFG* F) { return &F->getExit(); } 94902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static nodes_iterator nodes_begin( ::clang::CFG* F) {return F->nodes_begin();} 95002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static nodes_iterator nodes_end( ::clang::CFG* F) { return F->nodes_end(); } 9517dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 9527dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 953852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenektemplate <> struct GraphTraits<Inverse<const ::clang::CFG*> > 954852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek : public GraphTraits<Inverse<const ::clang::CFGBlock*> > { 9557dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 95602f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks typedef ::clang::CFG::const_graph_iterator nodes_iterator; 9577dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 958852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek static NodeType *getEntryNode(const ::clang::CFG* F) { return &F->getExit(); } 95902f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static nodes_iterator nodes_begin(const ::clang::CFG* F) { 96002f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return F->nodes_begin(); 96102f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks } 96202f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks static nodes_iterator nodes_end(const ::clang::CFG* F) { 96302f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks return F->nodes_end(); 96402f34c5003b2c5067675f89ffce0a84c28faf722Anna Zaks } 9657dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 9667dba8607e59096014b7139ff20ef00870041d518Ted Kremenek} // end llvm namespace 967cd881d534517f09a2fae10445f9b865f49ccc6c8Ted Kremenek#endif 968