CFG.cpp revision 44f8ef13a3af125eecd408d0fad79a4a1eda5366
1fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===--- CFG.cpp - 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 15bd0487825751230a4396952b770349d2beac60b3Ted Kremenek#include "clang/Analysis/Support/SaveAndRestore.h" 16e41611aa2237d06a0ef61db4528fb2883a8defcdTed Kremenek#include "clang/Analysis/CFG.h" 17b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump#include "clang/AST/DeclCXX.h" 18c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek#include "clang/AST/StmtVisitor.h" 1942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#include "clang/AST/PrettyPrinter.h" 207dba8607e59096014b7139ff20ef00870041d518Ted Kremenek#include "llvm/Support/GraphWriter.h" 216cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/Support/Allocator.h" 226cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/Support/Format.h" 236cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/ADT/DenseMap.h" 246cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/ADT/SmallPtrSet.h" 250ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek#include "llvm/ADT/OwningPtr.h" 2683c01da96f57cf732a5da9a83e2981241f205dc4Ted Kremenek 27fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenekusing namespace clang; 28fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 29fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremeneknamespace { 30fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 314afa39deaa245592977136d367251ee2c173dd8dDouglas Gregorstatic SourceLocation GetEndLoc(Decl* D) { 32c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek if (VarDecl* VD = dyn_cast<VarDecl>(D)) 33c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek if (Expr* Ex = VD->getInit()) 34c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek return Ex->getSourceRange().getEnd(); 356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return D->getLocation(); 37c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek} 38ad5a894df1841698c824381b414630799adc26caTed Kremenek 39852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekclass AddStmtChoice { 40852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekpublic: 415ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek enum Kind { NotAlwaysAdd = 0, 425ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AlwaysAdd = 1, 435ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AsLValueNotAlwaysAdd = 2, 445ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AlwaysAddAsLValue = 3 }; 455ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek 46792bea97c42dabffce457cc79f6bfede9ed21712Benjamin Kramer AddStmtChoice(Kind kind) : k(kind) {} 475ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek 48792bea97c42dabffce457cc79f6bfede9ed21712Benjamin Kramer bool alwaysAdd() const { return (unsigned)k & 0x1; } 49431ac2d9c2f7596af6187daf88be411cb1ea34cfTed Kremenek bool asLValue() const { return k >= AsLValueNotAlwaysAdd; } 505ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek 51852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekprivate: 52792bea97c42dabffce457cc79f6bfede9ed21712Benjamin Kramer Kind k; 53852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek}; 546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 55a34ea072371154c9042ce86321d17fbb4df1f84dTed Kremenek/// CFGBuilder - This class implements CFG construction from an AST. 56fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// The builder is stateful: an instance of the builder should be used to only 57fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// construct a single CFG. 58fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 59fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Example usage: 60fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 61fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFGBuilder builder; 62fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFG* cfg = builder.BuildAST(stmt1); 63fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// CFG construction is done via a recursive walk of an AST. We actually parse 656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// the AST in reverse order so that the successor of a basic block is 666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// constructed prior to its predecessor. This allows us to nicely capture 676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// implicit fall-throughs without extra basic blocks. 68c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek/// 69ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass CFGBuilder { 70e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump ASTContext *Context; 710ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek llvm::OwningPtr<CFG> cfg; 72ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek 73fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBlock* Block; 74fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBlock* Succ; 75bf15b278a439d73b605ec00a8d3977ef305712f4Ted Kremenek CFGBlock* ContinueTargetBlock; 768a294713e032e4a27bae61c040abb41397952676Ted Kremenek CFGBlock* BreakTargetBlock; 77b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek CFGBlock* SwitchTerminatedBlock; 78eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek CFGBlock* DefaultCaseBlock; 795d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* TryTerminatedBlock; 806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // LabelMap records the mapping from Label expressions to their blocks. 820cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek typedef llvm::DenseMap<LabelStmt*,CFGBlock*> LabelMapTy; 830cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek LabelMapTy LabelMap; 846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // A list of blocks that end with a "goto" that must be backpatched to their 866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // resolved targets upon completion of CFG construction. 874a2b8a10c4730eb2ceeec24505bef26eb7d829edTed Kremenek typedef std::vector<CFGBlock*> BackpatchBlocksTy; 880cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek BackpatchBlocksTy BackpatchBlocks; 896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // A list of labels whose address has been taken (for indirect gotos). 9119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek typedef llvm::SmallPtrSet<LabelStmt*,5> LabelSetTy; 9219bb356317952445b03ee341c02f6147083c9eeaTed Kremenek LabelSetTy AddressTakenLabels; 936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumppublic: 95ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek explicit CFGBuilder() : cfg(new CFG()), // crew a new CFG 96ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Block(NULL), Succ(NULL), 978a294713e032e4a27bae61c040abb41397952676Ted Kremenek ContinueTargetBlock(NULL), BreakTargetBlock(NULL), 985d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump SwitchTerminatedBlock(NULL), DefaultCaseBlock(NULL), 995d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump TryTerminatedBlock(NULL) {} 1006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 101d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // buildCFG - Used by external clients to construct the CFG. 102ad5a894df1841698c824381b414630799adc26caTed Kremenek CFG* buildCFG(const Decl *D, Stmt *Statement, ASTContext *C, 103fe255bc6dfddade15644aecead970791e96ddedcTed Kremenek bool pruneTriviallyFalseEdges, bool AddEHEdges); 1046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenekprivate: 1064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Visitors to walk an AST and construct the CFG. 107852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitAddrLabelExpr(AddrLabelExpr *A, AddStmtChoice asc); 108852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBinaryOperator(BinaryOperator *B, AddStmtChoice asc); 109852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBlockExpr(BlockExpr* E, AddStmtChoice asc); 1104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitBreakStmt(BreakStmt *B); 1117ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXCatchStmt(CXXCatchStmt *S); 1127ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXThrowExpr(CXXThrowExpr *T); 1137ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXTryStmt(CXXTryStmt *S); 114c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu CFGBlock *VisitCXXMemberCallExpr(CXXMemberCallExpr *C, AddStmtChoice asc); 115852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitCallExpr(CallExpr *C, AddStmtChoice asc); 1164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitCaseStmt(CaseStmt *C); 117852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitChooseExpr(ChooseExpr *C, AddStmtChoice asc); 1183fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitCompoundStmt(CompoundStmt *C); 1197ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitConditionalOperator(ConditionalOperator *C, AddStmtChoice asc); 1203fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitContinueStmt(ContinueStmt *C); 1214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclStmt(DeclStmt *DS); 1224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclSubExpr(Decl* D); 1233fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDefaultStmt(DefaultStmt *D); 1243fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDoStmt(DoStmt *D); 1253fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitForStmt(ForStmt *F); 1264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitGotoStmt(GotoStmt* G); 1274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIfStmt(IfStmt *I); 1284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIndirectGotoStmt(IndirectGotoStmt *I); 1294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitLabelStmt(LabelStmt *L); 130115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock *VisitMemberExpr(MemberExpr *M, AddStmtChoice asc); 1314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtCatchStmt(ObjCAtCatchStmt *S); 1324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S); 1334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtThrowStmt(ObjCAtThrowStmt *S); 1344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtTryStmt(ObjCAtTryStmt *S); 1354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCForCollectionStmt(ObjCForCollectionStmt *S); 1364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitReturnStmt(ReturnStmt* R); 137852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, AddStmtChoice asc); 138852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmtExpr(StmtExpr *S, AddStmtChoice asc); 1394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitSwitchStmt(SwitchStmt *S); 1404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitWhileStmt(WhileStmt *W); 1414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 142852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *Visit(Stmt *S, AddStmtChoice asc = AddStmtChoice::NotAlwaysAdd); 143852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmt(Stmt *S, AddStmtChoice asc); 1444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitChildren(Stmt* S); 145cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 146274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek // NYS == Not Yet Supported 147274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek CFGBlock* NYS() { 1484102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = true; 1494102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek return Block; 1504102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek } 1516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek void autoCreateBlock() { if (!Block) Block = createBlock(); } 1534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *createBlock(bool add_successor = true); 154d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu 155df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock *addStmt(Stmt *S) { 156df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu return Visit(S, AddStmtChoice::AlwaysAdd); 157852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 158ad5a894df1841698c824381b414630799adc26caTed Kremenek 159852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek void AppendStmt(CFGBlock *B, Stmt *S, 160852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { 161852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek B->appendStmt(S, cfg->getBumpVectorContext(), asc.asLValue()); 162ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 163ad5a894df1841698c824381b414630799adc26caTed Kremenek 164ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek void AddSuccessor(CFGBlock *B, CFGBlock *S) { 165ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek B->addSuccessor(S, cfg->getBumpVectorContext()); 166ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 1671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 168fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// TryResult - a class representing a variant over the values 169fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// 'true', 'false', or 'unknown'. This is returned by TryEvaluateBool, 170fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// and is used by the CFGBuilder to decide if a branch condition 171fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// can be decided up front during CFG construction. 172941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek class TryResult { 173941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek int X; 174941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek public: 175941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult(bool b) : X(b ? 1 : 0) {} 176941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult() : X(-1) {} 1771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 178941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isTrue() const { return X == 1; } 179941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isFalse() const { return X == 0; } 180941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isKnown() const { return X >= 0; } 181941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek void negate() { 182941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(isKnown()); 183941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek X ^= 0x1; 184941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek } 185941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek }; 1861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18700998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// TryEvaluateBool - Try and evaluate the Stmt and return 0 or 1 18800998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// if we can evaluate to a known value, otherwise return -1. 189941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult TryEvaluateBool(Expr *S) { 190ad5a894df1841698c824381b414630799adc26caTed Kremenek if (!PruneTriviallyFalseEdges) 191ad5a894df1841698c824381b414630799adc26caTed Kremenek return TryResult(); 192ad5a894df1841698c824381b414630799adc26caTed Kremenek 19300998a068e50945118f334c98af05ed44d7c22a6Mike Stump Expr::EvalResult Result; 1949983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor if (!S->isTypeDependent() && !S->isValueDependent() && 1959983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor S->Evaluate(Result, *Context) && Result.Val.isInt()) 196fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek return Result.Val.getInt().getBoolValue(); 197941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek 198941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return TryResult(); 19900998a068e50945118f334c98af05ed44d7c22a6Mike Stump } 20000998a068e50945118f334c98af05ed44d7c22a6Mike Stump 2014102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek bool badCFG; 2024c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 203ad5a894df1841698c824381b414630799adc26caTed Kremenek // True iff trivially false edges should be pruned from the CFG. 204ad5a894df1841698c824381b414630799adc26caTed Kremenek bool PruneTriviallyFalseEdges; 205ad5a894df1841698c824381b414630799adc26caTed Kremenek 2064c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump // True iff EH edges on CallExprs should be added to the CFG. 2074c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdges; 208d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 210898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// FIXME: Add support for dependent-sized array types in C++? 211898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// Does it even make sense to build a CFG for an uninstantiated template? 212610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenekstatic VariableArrayType* FindVA(Type* t) { 213610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek while (ArrayType* vt = dyn_cast<ArrayType>(t)) { 214610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt)) 215610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (vat->getSizeExpr()) 216610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return vat; 2176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 218610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek t = vt->getElementType().getTypePtr(); 219610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek } 2206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 221610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return 0; 222610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek} 2236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// BuildCFG - Constructs a CFG from an AST (a Stmt*). The AST can represent an 2256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// arbitrary statement. Examples include a single expression or a function 2266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// body (compound statement). The ownership of the returned CFG is 2276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// transferred to the caller. If CFG construction fails, this method returns 2286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// NULL. 229b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFGBuilder::buildCFG(const Decl *D, Stmt* Statement, ASTContext* C, 230ad5a894df1841698c824381b414630799adc26caTed Kremenek bool pruneTriviallyFalseEdges, 231fe255bc6dfddade15644aecead970791e96ddedcTed Kremenek bool addehedges) { 232ad5a894df1841698c824381b414630799adc26caTed Kremenek 23355f988efeb08b84c2dd9e4c05990b88c81fe2b58Mike Stump AddEHEdges = addehedges; 234ad5a894df1841698c824381b414630799adc26caTed Kremenek PruneTriviallyFalseEdges = pruneTriviallyFalseEdges; 235ad5a894df1841698c824381b414630799adc26caTed Kremenek 236e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump Context = C; 2370ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek assert(cfg.get()); 2384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!Statement) 2394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return NULL; 240d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 2414102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = false; 2426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block that will serve as the exit block for the CFG. Since 2446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // this is the first block added to the CFG, it will be implicitly registered 2456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // as the exit block. 24649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = createBlock(); 247ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek assert(Succ == &cfg->getExit()); 24849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; // the EXIT block is empty. Create all other blocks lazily. 2496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 250d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Visit the statements and create the CFG. 2511b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu CFGBlock *B = addStmt(Statement); 2521b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2531b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (badCFG) 2541b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu return NULL; 2551b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2561b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (B) 2571b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu Succ = B; 258b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump 259b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump if (const CXXConstructorDecl *CD = dyn_cast_or_null<CXXConstructorDecl>(D)) { 260b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump // FIXME: Add code for base initializers and member initializers. 261b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump (void)CD; 262b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump } 2636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2641b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // Backpatch the gotos whose label -> block mappings we didn't know when we 2651b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // encountered them. 2661b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu for (BackpatchBlocksTy::iterator I = BackpatchBlocks.begin(), 2671b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu E = BackpatchBlocks.end(); I != E; ++I ) { 268c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar 2691b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu CFGBlock* B = *I; 2701b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu GotoStmt* G = cast<GotoStmt>(B->getTerminator()); 2711b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu LabelMapTy::iterator LI = LabelMap.find(G->getLabel()); 2726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2731b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // If there is no target for the goto, then we are looking at an 2741b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // incomplete AST. Handle this by not registering a successor. 2751b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (LI == LabelMap.end()) continue; 276d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 2771b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu AddSuccessor(B, LI->second); 2781b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu } 2796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2801b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // Add successors to the Indirect Goto Dispatch block (if we have one). 2811b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (CFGBlock* B = cfg->getIndirectGotoBlock()) 2821b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu for (LabelSetTy::iterator I = AddressTakenLabels.begin(), 2831b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu E = AddressTakenLabels.end(); I != E; ++I ) { 2841b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2851b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // Lookup the target block. 2861b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu LabelMapTy::iterator LI = LabelMap.find(*I); 2871b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2881b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // If there is no target block that contains label, then we are looking 2891b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // at an incomplete AST. Handle this by not registering a successor. 2901b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (LI == LabelMap.end()) continue; 2911b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 292c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar AddSuccessor(B, LI->second); 293c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 2946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty entry block that has no predecessors. 296322f58d3830da13b419646c071e3ab801518a09cTed Kremenek cfg->setEntry(createBlock()); 2976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2981b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu return cfg.take(); 299d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 301d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// createBlock - Used to lazily create blocks that are connected 302d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// to the current (global) succcessor. 3036d9828c82c9321f042ab416fd2ffaa3034347d45Mike StumpCFGBlock* CFGBuilder::createBlock(bool add_successor) { 3049438252ad2ecae5338df565ca33c6969e4fbfa41Ted Kremenek CFGBlock* B = cfg->createBlock(); 3054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (add_successor && Succ) 306ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(B, Succ); 307d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return B; 308d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 3104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// Visit - Walk the subtree of a statement and add extra 3116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// blocks for ternary operators, &&, and ||. We also process "," and 3126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// DeclStmts (which may contain nested control-flow). 313852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::Visit(Stmt * S, AddStmtChoice asc) { 3144f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenektryAgain: 315f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek if (!S) { 316f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek badCFG = true; 317f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek return 0; 318f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek } 3194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek switch (S->getStmtClass()) { 3204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek default: 321852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, asc); 3224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::AddrLabelExprClass: 324852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitAddrLabelExpr(cast<AddrLabelExpr>(S), asc); 3251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BinaryOperatorClass: 327852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBinaryOperator(cast<BinaryOperator>(S), asc); 3281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BlockExprClass: 330852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBlockExpr(cast<BlockExpr>(S), asc); 3314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BreakStmtClass: 3334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitBreakStmt(cast<BreakStmt>(S)); 3341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CallExprClass: 336a427f1d8f0848997029d1bdc0c5c137f982f775dTed Kremenek case Stmt::CXXOperatorCallExprClass: 337852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitCallExpr(cast<CallExpr>(S), asc); 3381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CaseStmtClass: 3404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCaseStmt(cast<CaseStmt>(S)); 3414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ChooseExprClass: 343852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitChooseExpr(cast<ChooseExpr>(S), asc); 3441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CompoundStmtClass: 3464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(cast<CompoundStmt>(S)); 3471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ConditionalOperatorClass: 349852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitConditionalOperator(cast<ConditionalOperator>(S), asc); 3501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ContinueStmtClass: 3524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitContinueStmt(cast<ContinueStmt>(S)); 3531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 354021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXCatchStmtClass: 355021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXCatchStmt(cast<CXXCatchStmt>(S)); 356021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek 35747e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek case Stmt::CXXExprWithTemporariesClass: { 35847e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek // FIXME: Handle temporaries. For now, just visit the subexpression 35947e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek // so we don't artificially create extra blocks. 360a427f1d8f0848997029d1bdc0c5c137f982f775dTed Kremenek return Visit(cast<CXXExprWithTemporaries>(S)->getSubExpr(), asc); 36147e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek } 36247e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek 363c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu case Stmt::CXXMemberCallExprClass: 364c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitCXXMemberCallExpr(cast<CXXMemberCallExpr>(S), asc); 365c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 366021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXThrowExprClass: 367021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXThrowExpr(cast<CXXThrowExpr>(S)); 368ad5a894df1841698c824381b414630799adc26caTed Kremenek 369021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXTryStmtClass: 370021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXTryStmt(cast<CXXTryStmt>(S)); 371ad5a894df1841698c824381b414630799adc26caTed Kremenek 3724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DeclStmtClass: 3734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclStmt(cast<DeclStmt>(S)); 3741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DefaultStmtClass: 3764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDefaultStmt(cast<DefaultStmt>(S)); 3771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DoStmtClass: 3794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDoStmt(cast<DoStmt>(S)); 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ForStmtClass: 3824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitForStmt(cast<ForStmt>(S)); 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::GotoStmtClass: 3854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitGotoStmt(cast<GotoStmt>(S)); 3861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IfStmtClass: 3884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIfStmt(cast<IfStmt>(S)); 3891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3904f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IndirectGotoStmtClass: 3914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIndirectGotoStmt(cast<IndirectGotoStmt>(S)); 3921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3934f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::LabelStmtClass: 3944f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitLabelStmt(cast<LabelStmt>(S)); 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 396115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek case Stmt::MemberExprClass: 397115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return VisitMemberExpr(cast<MemberExpr>(S), asc); 398115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 3994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtCatchStmtClass: 4001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return VisitObjCAtCatchStmt(cast<ObjCAtCatchStmt>(S)); 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 4034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S)); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtThrowStmtClass: 4064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtThrowStmt(cast<ObjCAtThrowStmt>(S)); 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtTryStmtClass: 4094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtTryStmt(cast<ObjCAtTryStmt>(S)); 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCForCollectionStmtClass: 4124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S)); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ParenExprClass: 4154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek S = cast<ParenExpr>(S)->getSubExpr(); 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump goto tryAgain; 4171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4184f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::NullStmtClass: 4194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ReturnStmtClass: 4224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitReturnStmt(cast<ReturnStmt>(S)); 4231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SizeOfAlignOfExprClass: 425852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitSizeOfAlignOfExpr(cast<SizeOfAlignOfExpr>(S), asc); 4261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::StmtExprClass: 428852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmtExpr(cast<StmtExpr>(S), asc); 4291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SwitchStmtClass: 4314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitSwitchStmt(cast<SwitchStmt>(S)); 4321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::WhileStmtClass: 4344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitWhileStmt(cast<WhileStmt>(S)); 4354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 4364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 438852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitStmt(Stmt *S, AddStmtChoice asc) { 439852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 441852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, S, asc); 4426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitChildren(S); 4454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitChildren - Visit the children of a Stmt. 4484f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitChildren(Stmt* Terminator) { 4494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = Block; 4504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (Stmt::child_iterator I = Terminator->child_begin(), 4514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek E = Terminator->child_end(); I != E; ++I) { 4524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (*I) B = Visit(*I); 4536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return B; 4554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 457852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitAddrLabelExpr(AddrLabelExpr *A, 458852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek AddressTakenLabels.insert(A->getLabel()); 4606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 461852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 463852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, A, asc); 4646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 469852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBinaryOperator(BinaryOperator *B, 470852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (B->isLogicalOp()) { // && or || 4724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 473852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, B, asc); 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 475d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 4764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 4771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the LHS 4794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* LHSBlock = createBlock(false); 4804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LHSBlock->setTerminator(B); 4811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the RHS 4834f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = ConfluenceBlock; 4844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = NULL; 4854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* RHSBlock = addStmt(B->getRHS()); 486862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek 487862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek if (RHSBlock) { 488d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 489862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek return 0; 490862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek } 491862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek else { 492862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek // Create an empty block for cases where the RHS doesn't require 493862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek // any explicit statements in the CFG. 494862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek RHSBlock = createBlock(); 495862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek } 4961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 498941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal = TryEvaluateBool(B->getLHS()); 4992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (KnownVal.isKnown() && (B->getOpcode() == BO_LOr)) 500941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek KnownVal.negate(); 50100998a068e50945118f334c98af05ed44d7c22a6Mike Stump 5024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now link the LHSBlock with RHSBlock. 5032de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (B->getOpcode() == BO_LOr) { 504ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 505ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else { 5072de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(B->getOpcode() == BO_LAnd); 508ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 509ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 51019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 5111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Generate the blocks for evaluating the LHS. 5134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = LHSBlock; 5144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall else if (B->getOpcode() == BO_Comma) { // , 5176dc534ecc19a045ebcfe93eefa45da509968e888Ted Kremenek autoCreateBlock(); 518852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, B, asc); 5194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(B->getRHS()); 5204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 522fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu else if (B->isAssignmentOp()) { 523fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (asc.alwaysAdd()) { 524fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu autoCreateBlock(); 525fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu AppendStmt(Block, B, asc); 526fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 527ad5a894df1841698c824381b414630799adc26caTed Kremenek 52844f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek // If visiting RHS causes us to finish 'Block' and the LHS doesn't 52944f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek // create a new block, then we should return RBlock. Otherwise 53044f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek // we'll incorrectly return NULL. 53144f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek CFGBlock *RBlock = Visit(B->getRHS()); 53244f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek CFGBlock *LBlock = Visit(B->getLHS(), AddStmtChoice::AsLValueNotAlwaysAdd); 53344f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek return LBlock ? LBlock : RBlock; 534fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 5351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 536852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(B, asc); 5374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 539852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBlockExpr(BlockExpr *E, AddStmtChoice asc) { 540852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 541721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek autoCreateBlock(); 542852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, E, asc); 543721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek } 544721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek return Block; 5454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 546cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 5474f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitBreakStmt(BreakStmt *B) { 5484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // "break" is a control-flow statement. Thus we stop processing the current 5494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // block. 550d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 551d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu return 0; 5521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now create a new block that ends with the break statement. 5544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = createBlock(false); 5554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block->setTerminator(B); 5561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If there is no target for the break, then we are looking at an incomplete 5584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // AST. This means that the CFG cannot be constructed. 5594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (BreakTargetBlock) 560ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, BreakTargetBlock); 5614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek else 5624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek badCFG = true; 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 5664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5684c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stumpstatic bool CanThrow(Expr *E) { 5694c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump QualType Ty = E->getType(); 5704c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Ty->isFunctionPointerType()) 5714c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<PointerType>()->getPointeeType(); 5724c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump else if (Ty->isBlockPointerType()) 5734c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<BlockPointerType>()->getPointeeType(); 574ad5a894df1841698c824381b414630799adc26caTed Kremenek 5754c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump const FunctionType *FT = Ty->getAs<FunctionType>(); 5764c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (FT) { 5774c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT)) 5784c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Proto->hasEmptyExceptionSpec()) 5794c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return false; 5804c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump } 5814c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return true; 5824c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump} 5834c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 584852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitCallExpr(CallExpr *C, AddStmtChoice asc) { 5854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If this is a call to a no-return function, this stops the block here. 5862455636163fdd18581d7fdae816433f886d88213Mike Stump bool NoReturn = false; 587264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola if (getFunctionExtInfo(*C->getCallee()->getType()).getNoReturn()) { 5882455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 5892455636163fdd18581d7fdae816433f886d88213Mike Stump } 5902455636163fdd18581d7fdae816433f886d88213Mike Stump 5914c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdge = false; 592079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 593079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Languages without exceptions are assumed to not throw. 594079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Context->getLangOptions().Exceptions) { 5954c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdges) 5964c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = true; 597079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 598079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 599079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FunctionDecl *FD = C->getDirectCallee()) { 6002455636163fdd18581d7fdae816433f886d88213Mike Stump if (FD->hasAttr<NoReturnAttr>()) 6012455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 602079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FD->hasAttr<NoThrowAttr>()) 6034c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 604079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6052455636163fdd18581d7fdae816433f886d88213Mike Stump 6064c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (!CanThrow(C->getCallee())) 6074c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 6084c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 609fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (!NoReturn && !AddEHEdge) { 610fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (asc.asLValue()) 611fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAddAsLValue); 612fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu else 613fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAdd); 614fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 6151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 616079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Block) { 617079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Succ = Block; 618d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 619079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return 0; 620079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 622079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block = createBlock(!NoReturn); 623852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, C, asc); 6242455636163fdd18581d7fdae816433f886d88213Mike Stump 625079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (NoReturn) { 626079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Wire this to the exit block directly. 627079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 628079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6294c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdge) { 630079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Add exceptional edges. 631079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (TryTerminatedBlock) 632079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, TryTerminatedBlock); 633079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else 634079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 635079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6372455636163fdd18581d7fdae816433f886d88213Mike Stump return VisitChildren(C); 638d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 639d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 640852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitChooseExpr(ChooseExpr *C, 641852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 6423fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 643852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 644d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 6453fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 647115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 648115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 649115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 6503fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6513fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 652df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* LHSBlock = Visit(C->getLHS(), asc); 653d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 6543fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6563fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6573fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 658df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* RHSBlock = Visit(C->getRHS(), asc); 659d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 6603fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6623fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = createBlock(false); 66300998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 664941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 665ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 666ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 6673fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block->setTerminator(C); 6681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return addStmt(C->getCond()); 6693fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek} 6701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6721eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpCFGBlock* CFGBuilder::VisitCompoundStmt(CompoundStmt* C) { 6731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CFGBlock* LastBlock = Block; 6744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 6754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (CompoundStmt::reverse_body_iterator I=C->body_rbegin(), E=C->body_rend(); 6764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek I != E; ++I ) { 677334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek // If we hit a segment of code just containing ';' (NullStmts), we can 678334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek // get a null block back. In such cases, just use the LastBlock 679334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek if (CFGBlock *newBlock = addStmt(*I)) 680334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek LastBlock = newBlock; 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 682e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek if (badCFG) 683e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek return NULL; 6841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 685079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 6864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return LastBlock; 6874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 6881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 689852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitConditionalOperator(ConditionalOperator *C, 690852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 691f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the confluence block that will "merge" the results of the ternary 692f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // expression. 693f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 694852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 695d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 696f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 6971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 698115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 699115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 700115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 701f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create a block for the LHS expression if there is an LHS expression. A 702f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // GCC extension allows LHS to be NULL, causing the condition to be the 703f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // value that is returned instead. 704f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // e.g: x ?: y is shorthand for: x ? x : y; 705f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 706f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 707f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* LHSBlock = NULL; 708f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (C->getLHS()) { 709df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu LHSBlock = Visit(C->getLHS(), asc); 710d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 711f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 712f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 713f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 715f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block for the RHS expression. 716f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 717df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* RHSBlock = Visit(C->getRHS(), asc); 718d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 719f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 7201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 721f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block that will contain the condition. 722f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = createBlock(false); 7231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 72400998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 725941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 726e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (LHSBlock) { 727ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 728e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 729941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek if (KnownVal.isFalse()) { 730e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we know the condition is false, add NULL as the successor for 731e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the block containing the condition. In this case, the confluence 732e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // block will have just one predecessor. 733ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, 0); 734941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 1); 735e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 736e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we have no LHS expression, add the ConfluenceBlock as a direct 737e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // successor for the block containing the condition. Moreover, we need to 738e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // reverse the order of the predecessors in the ConfluenceBlock because 739e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the RHSBlock will have been added to the succcessors already, and we 740e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // want the first predecessor to the the block containing the expression 741e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // for the case when the ternary expression evaluates to true. 742ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ConfluenceBlock); 743941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 2); 744e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump std::reverse(ConfluenceBlock->pred_begin(), 745e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump ConfluenceBlock->pred_end()); 746e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } 747f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 749ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 750f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block->setTerminator(C); 751f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return addStmt(C->getCond()); 752f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek} 753f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek 7544f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclStmt(DeclStmt *DS) { 7554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 7566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 7574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (DS->isSingleDecl()) { 758ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DS); 7594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclSubExpr(DS->getSingleDecl()); 760d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek } 7611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = 0; 7631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: Add a reverse iterator for DeclStmt to avoid this extra copy. 7654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek typedef llvm::SmallVector<Decl*,10> BufTy; 7664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BufTy Buf(DS->decl_begin(), DS->decl_end()); 7671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7684f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (BufTy::reverse_iterator I = Buf.rbegin(), E = Buf.rend(); I != E; ++I) { 7694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Get the alignment of the new DeclStmt, padding out to >=8 bytes. 7704f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek unsigned A = llvm::AlignOf<DeclStmt>::Alignment < 8 7714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ? 8 : llvm::AlignOf<DeclStmt>::Alignment; 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Allocate the DeclStmt using the BumpPtrAllocator. It will get 7744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // automatically freed with the CFG. 7754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclGroupRef DG(*I); 7764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Decl *D = *I; 7771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump void *Mem = cfg->getAllocator().Allocate(sizeof(DeclStmt), A); 7784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclStmt *DSNew = new (Mem) DeclStmt(DG, D->getLocation(), GetEndLoc(D)); 7791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Append the fake DeclStmt to block. 781ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DSNew); 7824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek B = VisitDeclSubExpr(D); 7834f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 7841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return B; 7864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 7871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitDeclSubExpr - Utility method to add block-level expressions for 7894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// initializers in Decls. 7904f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclSubExpr(Decl* D) { 7914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(Block); 792d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek 7934f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VarDecl *VD = dyn_cast<VarDecl>(D); 7941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!VD) 7964f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 7971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Expr *Init = VD->getInit(); 7991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Init) { 8015ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AddStmtChoice::Kind k = 8025ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek VD->getType()->isReferenceType() ? AddStmtChoice::AsLValueNotAlwaysAdd 8035ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek : AddStmtChoice::NotAlwaysAdd; 8045ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek Visit(Init, AddStmtChoice(k)); 8054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 8061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8074f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If the type of VD is a VLA, then we must process its size expressions. 8084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(VD->getType().getTypePtr()); VA != 0; 8094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA = FindVA(VA->getElementType().getTypePtr())) 8104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = addStmt(VA->getSizeExpr()); 8111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 813d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 814fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 815d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitIfStmt(IfStmt* I) { 8166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We may see an if statement in the middle of a basic block, or it may be the 8176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // first statement we are processing. In either case, we create a new basic 8186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. First, we create the blocks for the then...else statements, and 8196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // then we create the block containing the if statement. If we were in the 8206c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // middle of a block, we stop processing that block. That block is then the 8216c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // implicit successor for the "then" and "else" clauses. 8226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The block we were proccessing is now finished. Make it the successor 8246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 8256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 826d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = Block; 827d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 8284e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 829c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 831b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the false branch. 832d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ElseBlock = Succ; 8336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 834d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* Else = I->getElse()) { 835d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 837d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block so that the recursive call to Visit will 8386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // create a new basic block. 839d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 8404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ElseBlock = addStmt(Else); 8416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 842b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek if (!ElseBlock) // Can occur when the Else body has all NullStmts. 843b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek ElseBlock = sv.get(); 8444e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 845d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 8464e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8474e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 848c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 850b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the true branch. 851d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ThenBlock; 852d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 853d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Stmt* Then = I->getThen(); 8546db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Then); 855d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Block = NULL; 8574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ThenBlock = addStmt(Then); 8586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 859dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek if (!ThenBlock) { 860dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // We can reach here if the "then" body has all NullStmts. 861dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // Create an empty block so we can distinguish between true and false 862dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // branches in path-sensitive analyses. 863dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek ThenBlock = createBlock(false); 864ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ThenBlock, sv.get()); 8656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (Block) { 866d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 8674e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 8690cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek } 870d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 8716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now create a new block containing the if statement. 872d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 8736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 874d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Set the terminator of the new block to the If statement. 875d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(I); 8766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 87700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 878941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(I->getCond()); 87900998a068e50945118f334c98af05ed44d7c22a6Mike Stump 880d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now add the successors. 881ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : ThenBlock); 882ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue()? NULL : ElseBlock); 8836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the condition as the last statement in the new block. This may create 8856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // new blocks as the condition may contain control-flow. Any newly created 8866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // blocks will be pointed to be "Block". 88761dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek Block = addStmt(I->getCond()); 888ad5a894df1841698c824381b414630799adc26caTed Kremenek 88961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // Finally, if the IfStmt contains a condition variable, add both the IfStmt 89061dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // and the condition variable initialization to the CFG. 89161dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (VarDecl *VD = I->getConditionVariable()) { 89261dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (Expr *Init = VD->getInit()) { 89361dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek autoCreateBlock(); 89461dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek AppendStmt(Block, I, AddStmtChoice::AlwaysAdd); 89561dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek addStmt(Init); 89661dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 89761dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 898ad5a894df1841698c824381b414630799adc26caTed Kremenek 89961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek return Block; 900d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 9016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 903d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitReturnStmt(ReturnStmt* R) { 9046c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 905d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // 9066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NOTE: If a "return" appears in the middle of a block, this means that the 9076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // code afterwards is DEAD (unreachable). We still keep a basic block 9086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for that code; a simple "mark-and-sweep" from the entry block will be 9096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // able to report such dead blocks. 910d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 911d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the new block. 912d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 9136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 914d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // The Exit block is the only successor. 915ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 9166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the return statement to the block. This may create new blocks if R 9186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // contains control-flow (short-circuit operations). 919852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(R, AddStmtChoice::AlwaysAdd); 920d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 9210cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek 922d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitLabelStmt(LabelStmt* L) { 923d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Get the block of the labeled statement. Add it to our map. 9244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(L->getSubStmt()); 9252677ea871a25aa79f9db360f6ed10584c02267adTed Kremenek CFGBlock* LabelBlock = Block; 9266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!LabelBlock) // This can happen when the body is empty, i.e. 9284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LabelBlock = createBlock(); // scopes that only contains NullStmts. 9296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(LabelMap.find(L) == LabelMap.end() && "label already in map"); 931d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMap[ L ] = LabelBlock; 9326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Labels partition blocks, so this is the end of the basic block we were 9346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing (L is the block's label). Because this is label (and we have 9356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // already processed the substatement) there is no extra control-flow to worry 9366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // about. 9379cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek LabelBlock->setLabel(L); 938d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 9394e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 9406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary); 942d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 9436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 944d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // This block is now the implicit successor of other blocks. 945d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = LabelBlock; 9466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 947d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return LabelBlock; 948d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 94931dcd3c8c4df5a656f58f50ea73afc177c101c67Ted Kremenek 950d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitGotoStmt(GotoStmt* G) { 9516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Goto is a control-flow statement. Thus we stop processing the current 9526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block and create a new one. 9534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 954d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 955d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(G); 9566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we already know the mapping to the label block add the successor now. 958d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMapTy::iterator I = LabelMap.find(G->getLabel()); 9596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 960d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (I == LabelMap.end()) 961d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We will need to backpatch this block later. 962d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BackpatchBlocks.push_back(Block); 963d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek else 964ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, I->second); 965d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 9666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 967d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 968d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 969d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) { 970d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 9716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 972fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "for" is a control-flow statement. Thus we stop processing the current 973fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 974d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 975d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 9764e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 977d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 9784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 9794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 9806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9813f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // Save the current value for the break targets. 9823f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // All breaks should go to the code following the loop. 9833f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek SaveAndRestore<CFGBlock*> save_break(BreakTargetBlock); 9843f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek BreakTargetBlock = LoopSuccessor; 9853f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek 9866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 9876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 9886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 98949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 99049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 9916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 99249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 9936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(F); 9946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 9966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 99749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = F->getCond()) { 99849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 99949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 100058b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 100158b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek 100258b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // If this block contains a condition variable, add both the condition 100358b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // variable and initializer to the CFG. 100458b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (VarDecl *VD = F->getConditionVariable()) { 100558b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (Expr *Init = VD->getInit()) { 100658b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek autoCreateBlock(); 100758b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek AppendStmt(Block, F, AddStmtChoice::AlwaysAdd); 100858b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek EntryConditionBlock = addStmt(Init); 100958b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 101058b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 101158b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 1012ad5a894df1841698c824381b414630799adc26caTed Kremenek 10134e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1014d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 10154e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10164e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 101749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 1018d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 10196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 10206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 102149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 10226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 102300998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1024941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal(true); 10251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 102600998a068e50945118f334c98af05ed44d7c22a6Mike Stump if (F->getCond()) 102700998a068e50945118f334c98af05ed44d7c22a6Mike Stump KnownVal = TryEvaluateBool(F->getCond()); 102800998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1029d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create the loop body. 1030d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 10316db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(F->getBody()); 10326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10333f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // Save the current values for Block, Succ, and continue targets. 10343f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 10353f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek save_continue(ContinueTargetBlock); 10366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1037af603f742491dc4707138c0293d295171fdd51baTed Kremenek // Create a new block to contain the (bottom) of the loop body. 1038af603f742491dc4707138c0293d295171fdd51baTed Kremenek Block = NULL; 10396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1040e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek if (Stmt* I = F->getInc()) { 10416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Generate increment code in its own basic block. This is the target of 10426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // continue statements. 10434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = addStmt(I); 10446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // No increment code. Create a special, empty, block that is used as the 10466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // target block for "looping back" to the start of the loop. 10473575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Succ == EntryConditionBlock); 10483575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Succ = createBlock(); 1049e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek } 10506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10513575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // Finish up the increment (or empty) block if it hasn't been already. 10523575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek if (Block) { 10533575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Block == Succ); 1054d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 10554e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10563575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Block = 0; 10573575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek } 10586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10593575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock = Succ; 10606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10613575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // The starting block for the loop increment is the block that should 10623575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // represent the 'loop target' for looping back to the start of the loop. 10633575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock->setLoopTarget(F); 10643575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek 10656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now populate the body block, and in the process create new blocks as we 10666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // walk the body of the loop. 10674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(F->getBody()); 1068af603f742491dc4707138c0293d295171fdd51baTed Kremenek 1069af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 10701d4b218fa55239f2a7350f48be14090d2753c22cZhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "for (...;...;...) ;" 1071d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu else if (badCFG) 1072941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return 0; 10736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1074941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // This new body block is a successor to our "exit" condition block. 1075ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1076d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 10776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1078941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1079941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1080ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 10816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1082d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If the loop contains initialization, create a new block for those 10836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statements. This block can also contain statements that precede the loop. 1084d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* I = F->getInit()) { 1085d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(); 108649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return addStmt(I); 10876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There is no loop initialization. We are thus basically a while loop. 10896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NULL out Block to force lazy block construction. 10902bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek Block = NULL; 10915482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 109249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 10932bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek } 1094d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1095d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1096115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted KremenekCFGBlock *CFGBuilder::VisitMemberExpr(MemberExpr *M, AddStmtChoice asc) { 1097115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek if (asc.alwaysAdd()) { 1098115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek autoCreateBlock(); 1099115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek AppendStmt(Block, M, asc); 1100115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek } 1101115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return Visit(M->getBase(), 1102115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek M->isArrow() ? AddStmtChoice::NotAlwaysAdd 1103115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AsLValueNotAlwaysAdd); 1104115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek} 1105115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 1106514de5a21645900c92cf4f4f7313d6f66945d134Ted KremenekCFGBlock* CFGBuilder::VisitObjCForCollectionStmt(ObjCForCollectionStmt* S) { 1107514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Objective-C fast enumeration 'for' statements: 1108514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC 1109514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1110514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( Type newVariable in collection_expression ) { statements } 1111514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1112514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1113514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1114514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // prologue: 1115514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. collection_expression 1116514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1117514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // loop_entry: 11184cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // 1. side-effects of element expression 1119514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. ObjCForCollectionStmt [performs binding to newVariable] 1120514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. ObjCForCollectionStmt TB, FB [jumps to TB if newVariable != nil] 1121514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // TB: 1122514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // statements 1123514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1124514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // FB: 1125514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // what comes after 1126514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1127514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // and 1128514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1129514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Type existingItem; 1130514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( existingItem in expression ) { statements } 1131514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1132514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1133514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same with newVariable replaced with existingItem; the binding works 11356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same except that for one ObjCForCollectionStmt::getElement() returns 11366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // a DeclStmt and the other returns a DeclRefExpr. 1137514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1139514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek CFGBlock* LoopSuccessor = 0; 11406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1141514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek if (Block) { 1142d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 11434e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1144514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek LoopSuccessor = Block; 1145514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek Block = 0; 11464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 11474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 11486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11494cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Build the condition blocks. 11504cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 11514cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 11526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11534cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Set the terminator for the "exit" condition block. 11546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(S); 11556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The last statement in the block should be the ObjCForCollectionStmt, which 11576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // performs the actual binding to 'element' and determines if there are any 11586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // more items in the collection. 1159ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(ExitConditionBlock, S); 11604cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = ExitConditionBlock; 11616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11624cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Walk the 'element' expression to see if there are any side-effects. We 11636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // generate new blocks as necesary. We DON'T add the statement by default to 11646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the CFG unless it contains control-flow. 1165852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek EntryConditionBlock = Visit(S->getElement(), AddStmtChoice::NotAlwaysAdd); 11666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 1167d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 11684e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 11694e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek Block = 0; 11704e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 11716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 11736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 11744cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Succ = EntryConditionBlock; 11756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11764cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Now create the true branch. 11776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump { 11784cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Save the current values for Succ, continue and break targets. 11794cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek SaveAndRestore<CFGBlock*> save_Succ(Succ), 11806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump save_continue(ContinueTargetBlock), save_break(BreakTargetBlock); 11816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11824cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BreakTargetBlock = LoopSuccessor; 11836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = EntryConditionBlock; 11846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(S->getBody()); 11866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11874cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek if (!BodyBlock) 11884cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BodyBlock = EntryConditionBlock; // can happen for "for (X in Y) ;" 11894e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 1190d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 11914e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 11924e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 11936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11944cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // This new body block is a successor to our "exit" condition block. 1195ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, BodyBlock); 11964cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek } 11976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11984cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Link up the condition block with the code that follows the loop. 11994cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // (the false branch). 1200ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, LoopSuccessor); 12014cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek 1202514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Now create a prologue block to contain the collection expression. 12034cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = createBlock(); 1204514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek return addStmt(S->getCollection()); 12056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 12066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1207b3b0b3624e462c2940f65b86e773bfc300005203Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt* S) { 1208b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // FIXME: Add locking 'primitives' to CFG for @synchronized. 12096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1210b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the body. 12114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *SyncBlock = addStmt(S->getSynchBody()); 12126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1213da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // The sync body starts its own basic block. This makes it a little easier 1214da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // for diagnostic clients. 1215da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek if (SyncBlock) { 1216d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 1217da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek return 0; 12186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1219da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek Block = 0; 1220fadebbafe622752c3c6565b53ce8cd42bbbbd90cTed Kremenek Succ = SyncBlock; 1221da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek } 12226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12234beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // Add the @synchronized to the CFG. 12244beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek autoCreateBlock(); 12254beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek AppendStmt(Block, S, AddStmtChoice::AlwaysAdd); 12264beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 1227b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the sync expression. 12284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(S->getSynchExpr()); 1229b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek} 12306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1231e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtTryStmt(ObjCAtTryStmt* S) { 12324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME 123390658ec72542df44eb462c69056184d2946bdbceTed Kremenek return NYS(); 1234e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted Kremenek} 1235514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek 1236d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitWhileStmt(WhileStmt* W) { 1237d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 12386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1239fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "while" is a control-flow statement. Thus we stop processing the current 1240fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 1241d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 1242d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 12434e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1244d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 12454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 12464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 12476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 12496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 12506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 125149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 125249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 12536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 125449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 125549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ExitConditionBlock->setTerminator(W); 12566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 12586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. Thus we update 12596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "Succ" after adding the condition. 126049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = W->getCond()) { 126149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 126249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 1263f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Block == EntryConditionBlock); 1264ad5a894df1841698c824381b414630799adc26caTed Kremenek 12654ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // If this block contains a condition variable, add both the condition 12664ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // variable and initializer to the CFG. 12674ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (VarDecl *VD = W->getConditionVariable()) { 12684ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (Expr *Init = VD->getInit()) { 12694ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek autoCreateBlock(); 12704ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek AppendStmt(Block, W, AddStmtChoice::AlwaysAdd); 12714ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek EntryConditionBlock = addStmt(Init); 12724ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek assert(Block == EntryConditionBlock); 12734ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 12744ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 12754ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek 12764e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1277d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 12784e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 12794e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 128049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 12816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 12836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 128449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 12856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 128600998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1287941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(W->getCond()); 128800998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1289d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 1290d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 1291f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(W->getBody()); 1292d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1293d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1294d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 1295d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_continue(ContinueTargetBlock), 1296d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_break(BreakTargetBlock); 1297f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek 12986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block to represent the transition block for looping back 12996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to the head of the loop. 1300f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Block = 0; 1301f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Succ == EntryConditionBlock); 1302f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ = createBlock(); 1303f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ->setLoopTarget(W); 13046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = Succ; 13056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1306d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1307d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 13086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1309d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1310f752fcfae84fbf21b78383bf2461633382d51844Ted Kremenek Block = NULL; 13116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1312d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 13134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(W->getBody()); 13146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1315af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1316d5c3b1339e842619fc3ae79482424f901aeb89f3Zhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "while(...) ;" 13174e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 1318d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13194e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 13204e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 13216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1322941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Add the loop body entry as a successor to the condition. 1323ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1324bf15b278a439d73b605ec00a8d3977ef305712f4Ted Kremenek } 13256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1326941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1327941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1328ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 13296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the condition block since we loop back 13316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to this block. NULL out Block to force lazy creation of another block. 1332d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 13336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13344ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // Return the condition block, which is the dominating block for the loop. 13355482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 133649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 1337d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 13381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13404f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitObjCAtCatchStmt(ObjCAtCatchStmt* S) { 13414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: For now we pretend that @catch and the code it contains does not 13424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // exit. 13434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 13444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 13456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13462fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtThrowStmt(ObjCAtThrowStmt* S) { 13472fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // FIXME: This isn't complete. We basically treat @throw like a return 13482fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // statement. 13496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13506c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 1351d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 13536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13542fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // Create the new block. 13552fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek Block = createBlock(false); 13566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13572fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // The Exit block is the only successor. 1358ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 13596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the statement to the block. This may create new blocks if S contains 13616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow (short-circuit operations). 1362852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, AddStmtChoice::AlwaysAdd); 13632fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek} 1364989d52d469df0c202f7de82f54407066c7db2e63Ted Kremenek 13650979d80615df97c675423de631c1b884819f4712Mike StumpCFGBlock* CFGBuilder::VisitCXXThrowExpr(CXXThrowExpr* T) { 13666c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 1367d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13680979d80615df97c675423de631c1b884819f4712Mike Stump return 0; 13690979d80615df97c675423de631c1b884819f4712Mike Stump 13700979d80615df97c675423de631c1b884819f4712Mike Stump // Create the new block. 13710979d80615df97c675423de631c1b884819f4712Mike Stump Block = createBlock(false); 13720979d80615df97c675423de631c1b884819f4712Mike Stump 13735d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (TryTerminatedBlock) 13745d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The current try statement is the only successor. 13755d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, TryTerminatedBlock); 1376ad5a894df1841698c824381b414630799adc26caTed Kremenek else 13775d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // otherwise the Exit block is the only successor. 13785d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, &cfg->getExit()); 13790979d80615df97c675423de631c1b884819f4712Mike Stump 13800979d80615df97c675423de631c1b884819f4712Mike Stump // Add the statement to the block. This may create new blocks if S contains 13810979d80615df97c675423de631c1b884819f4712Mike Stump // control-flow (short-circuit operations). 1382852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(T, AddStmtChoice::AlwaysAdd); 13830979d80615df97c675423de631c1b884819f4712Mike Stump} 13840979d80615df97c675423de631c1b884819f4712Mike Stump 13854f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDoStmt(DoStmt* D) { 1386d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 13876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13888f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // "do...while" is a control-flow statement. Thus we stop processing the 13898f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // current block. 1390d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 1391d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13924e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1393d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 13944f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 13954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 13966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 13986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 13996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 140049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 140149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 14026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 140349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 14046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(D); 14056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 14076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 140849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = D->getCond()) { 140949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 141049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 14114e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1412d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 14134e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14144e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 141549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 14166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14175482713d70ecbfe608940018046aa248b3d03443Ted Kremenek // The condition block is the implicit successor for the loop body. 141849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 141949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 142000998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1421941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(D->getCond()); 142200998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1423d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 142449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* BodyBlock = NULL; 1425d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 14266db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(D->getBody()); 14276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1428d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1429d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 14305d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_continue(ContinueTargetBlock), 14315d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_break(BreakTargetBlock); 14326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1433d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All continues within this loop should go to the condition block 143449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ContinueTargetBlock = EntryConditionBlock; 14356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1436d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1437d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 14386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1439d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1440b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek Block = NULL; 14416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1442d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 14434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BodyBlock = addStmt(D->getBody()); 14446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1445af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1446a9d996dbeb719200c4a9d86f68166a237583025fTed Kremenek BodyBlock = EntryConditionBlock; // can happen for "do ; while(...)" 14474e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 1448d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 14494e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14504e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 14516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1452d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek if (!KnownVal.isFalse()) { 1453d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // Add an intermediate block between the BodyBlock and the 1454d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // ExitConditionBlock to represent the "loop back" transition. Create an 1455d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // empty block to represent the transition block for looping back to the 1456d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // head of the loop. 1457d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // FIXME: Can we do this more efficiently without adding another block? 1458d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek Block = NULL; 1459d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek Succ = BodyBlock; 1460d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek CFGBlock *LoopBackBlock = createBlock(); 1461d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek LoopBackBlock->setLoopTarget(D); 1462d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek 1463d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // Add the loop body entry as a successor to the condition. 1464d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek AddSuccessor(ExitConditionBlock, LoopBackBlock); 1465d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek } 1466d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek else 1467d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek AddSuccessor(ExitConditionBlock, NULL); 1468b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek } 14696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1470941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. 1471941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // (the false branch). 1472ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 14736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the body block(s) since we loop back to 14756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the body. NULL out Block to force lazy creation of another block. 1476d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 14776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1478d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Return the loop body, which is the dominating block for the loop. 14795482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = BodyBlock; 1480d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return BodyBlock; 1481d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1482d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1483d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitContinueStmt(ContinueStmt* C) { 1484d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // "continue" is a control-flow statement. Thus we stop processing the 1485d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // current block. 1486d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 1487d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu return 0; 14886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1489d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create a new block that ends with the continue statement. 1490d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 1491d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(C); 14926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1493d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If there is no target for the continue, then we are looking at an 1494235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek // incomplete AST. This means the CFG cannot be constructed. 1495235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek if (ContinueTargetBlock) 1496ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ContinueTargetBlock); 1497235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek else 1498235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek badCFG = true; 14996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1500d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return Block; 1501d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 15021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 150313fc08a323b29dd97a46def1e3a15bf082476efaTed KremenekCFGBlock *CFGBuilder::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, 1504852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 150513fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek 1506852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 150713fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1508ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, E); 150913fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // VLA types have expressions that must be evaluated. 15124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (E->isArgumentType()) { 15134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(E->getArgumentType().getTypePtr()); 15144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA != 0; VA = FindVA(VA->getElementType().getTypePtr())) 15154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(VA->getSizeExpr()); 15164e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 15171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 1519d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 15201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitStmtExpr - Utility method to handle (nested) statement 15224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// expressions (a GCC extension). 1523852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::VisitStmtExpr(StmtExpr *SE, AddStmtChoice asc) { 1524852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 152513fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1526ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, SE); 152713fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(SE->getSubStmt()); 15294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 1530d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1531411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitSwitchStmt(SwitchStmt* Terminator) { 15326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "switch" is a control-flow statement. Thus we stop processing the current 15336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 1534d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* SwitchSuccessor = NULL; 15356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1536d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 1537d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 15384e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1539d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchSuccessor = Block; 15406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else SwitchSuccessor = Succ; 1541d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1542d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current "switch" context. 1543d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_switch(SwitchTerminatedBlock), 1544eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_break(BreakTargetBlock), 1545eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_default(DefaultCaseBlock); 1546eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 15476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Set the "default" case to be the block after the switch statement. If the 15486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // switch statement contains a "default:", this value will be overwritten with 15496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the block for that code. 1550eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = SwitchSuccessor; 15516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1552d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create a new block that will contain the switch statement. 1553d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchTerminatedBlock = createBlock(false); 15546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1555d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now process the switch body. The code after the switch is the implicit 1556d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // successor. 1557d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = SwitchSuccessor; 1558d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = SwitchSuccessor; 15596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // When visiting the body, the case statements should automatically get linked 15616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // up to the switch. We also don't keep a pointer to the body, since all 15626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow from the switch goes to case/default statements. 15636db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getBody() && "switch must contain a non-NULL body"); 156449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; 1565d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu addStmt(Terminator->getBody()); 15664e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1567d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 15684e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 15694e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 157049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 15716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we have no "default:" case, the default transition is to the code 15726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // following the switch body. 1573ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, DefaultCaseBlock); 15746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 157549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Add the terminator and condition in the switch block. 1576411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek SwitchTerminatedBlock->setTerminator(Terminator); 15776db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getCond() && "switch condition must be non-NULL"); 1578d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = SwitchTerminatedBlock; 15796b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek Block = addStmt(Terminator->getCond()); 1580ad5a894df1841698c824381b414630799adc26caTed Kremenek 15816b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // Finally, if the SwitchStmt contains a condition variable, add both the 15826b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // SwitchStmt and the condition variable initialization to the CFG. 15836b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (VarDecl *VD = Terminator->getConditionVariable()) { 15846b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (Expr *Init = VD->getInit()) { 15856b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek autoCreateBlock(); 15866b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek AppendStmt(Block, Terminator, AddStmtChoice::AlwaysAdd); 15876b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek addStmt(Init); 15886b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 15896b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 1590ad5a894df1841698c824381b414630799adc26caTed Kremenek 15916b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek return Block; 1592d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1593d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 15944f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock* CFGBuilder::VisitCaseStmt(CaseStmt* CS) { 15956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // CaseStmts are essentially labels, so they are the first statement in a 15966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 15970fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CFGBlock *TopBlock = 0, *LastBlock = 0; 15980fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 15990fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (Stmt *Sub = CS->getSubStmt()) { 16000fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // For deeply nested chains of CaseStmts, instead of doing a recursion 16010fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // (which can blow out the stack), manually unroll and create blocks 16020fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // along the way. 16030fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek while (isa<CaseStmt>(Sub)) { 16040fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CFGBlock *CurrentBlock = createBlock(false); 16050fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CurrentBlock->setLabel(CS); 16060fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16070fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (TopBlock) 16080fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(LastBlock, CurrentBlock); 16090fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek else 16100fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek TopBlock = CurrentBlock; 16110fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16120fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(SwitchTerminatedBlock, CurrentBlock); 16130fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek LastBlock = CurrentBlock; 16140fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16150fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CS = cast<CaseStmt>(Sub); 16160fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Sub = CS->getSubStmt(); 16170fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 161829ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek 16190fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek addStmt(Sub); 16200fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 162229ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek CFGBlock* CaseBlock = Block; 16234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!CaseBlock) 16244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock = createBlock(); 16256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Cases statements partition blocks, so this is the top of the basic block we 16276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // were processing (the "case XXX:" is the label). 16284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock->setLabel(CS); 16294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 1630d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 16314e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 16326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add this block to the list of successors for the block with the switch 16346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statement. 16354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(SwitchTerminatedBlock); 1636ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, CaseBlock); 16376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1638d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1639d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 16406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16410fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (TopBlock) { 16420fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(LastBlock, CaseBlock); 16430fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Succ = TopBlock; 16440fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16450fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek else { 16460fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // This block is now the implicit successor of other blocks. 16470fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Succ = CaseBlock; 16480fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16500fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek return Succ; 1651d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 16526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1653411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitDefaultStmt(DefaultStmt* Terminator) { 16544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Terminator->getSubStmt()) 16554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(Terminator->getSubStmt()); 16561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1657eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = Block; 16584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 16594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!DefaultCaseBlock) 16604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DefaultCaseBlock = createBlock(); 16616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Default statements partition blocks, so this is the top of the basic block 16636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // we were processing (the "default:" is the label). 1664411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek DefaultCaseBlock->setLabel(Terminator); 16651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1666d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 16674e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1668eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 16696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Unlike case statements, we don't add the default block to the successors 16706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for the switch statement immediately. This is done when we finish 16716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing the switch statement. This allows for the default case 16726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // (including a fall-through to the code after the switch statement) to always 16736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // be the last successor of a switch-terminated block. 16746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1675eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1676eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Block = NULL; 16776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1678eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // This block is now the implicit successor of other blocks. 1679eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Succ = DefaultCaseBlock; 16806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return DefaultCaseBlock; 1682295222c1f0926d84de77f076e79903523eeb5dbfTed Kremenek} 1683d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 16845d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock *CFGBuilder::VisitCXXTryStmt(CXXTryStmt *Terminator) { 16855d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // "try"/"catch" is a control-flow statement. Thus we stop processing the 16865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // current block. 16875d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* TrySuccessor = NULL; 16885d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16895d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (Block) { 1690d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 16915d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 16925d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump TrySuccessor = Block; 16935d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else TrySuccessor = Succ; 16945d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1695a1f93631a84621d77aeb627691da85a8991af188Mike Stump CFGBlock *PrevTryTerminatedBlock = TryTerminatedBlock; 16965d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16975d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Create a new block that will contain the try statement. 1698f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump CFGBlock *NewTryTerminatedBlock = createBlock(false); 16995d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add the terminator in the try block. 1700f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump NewTryTerminatedBlock->setTerminator(Terminator); 17015d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1702a1f93631a84621d77aeb627691da85a8991af188Mike Stump bool HasCatchAll = false; 17035d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump for (unsigned h = 0; h <Terminator->getNumHandlers(); ++h) { 17045d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 17055d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 17065d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CXXCatchStmt *CS = Terminator->getHandler(h); 1707a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl() == 0) { 1708a1f93631a84621d77aeb627691da85a8991af188Mike Stump HasCatchAll = true; 1709a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 17105d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17115d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock *CatchBlock = VisitCXXCatchStmt(CS); 17125d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CatchBlock == 0) 17135d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17145d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add this block to the list of successors for the block with the try 17155d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // statement. 1716f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, CatchBlock); 17175d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 1718a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (!HasCatchAll) { 1719a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (PrevTryTerminatedBlock) 1720f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, PrevTryTerminatedBlock); 1721a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 1722f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, &cfg->getExit()); 1723a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 17245d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17255d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 17265d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 17275d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1728f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump // Save the current "try" context. 1729f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump SaveAndRestore<CFGBlock*> save_try(TryTerminatedBlock); 1730f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump TryTerminatedBlock = NewTryTerminatedBlock; 1731f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump 17326db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getTryBlock() && "try must contain a non-NULL body"); 17335d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17343fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek Block = addStmt(Terminator->getTryBlock()); 17355d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return Block; 17365d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17375d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17385d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock* CFGBuilder::VisitCXXCatchStmt(CXXCatchStmt* CS) { 17395d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // CXXCatchStmt are treated like labels, so they are the first statement in a 17405d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // block. 17415d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17425d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CS->getHandlerBlock()) 17435d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump addStmt(CS->getHandlerBlock()); 17445d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17455d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* CatchBlock = Block; 17465d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!CatchBlock) 17475d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock = createBlock(); 17485d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17495d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock->setLabel(CS); 17505d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1751d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 17525d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17535d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17545d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary) 17555d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17565d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17575d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return CatchBlock; 17585d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17595d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1760ad5a894df1841698c824381b414630799adc26caTed KremenekCFGBlock *CFGBuilder::VisitCXXMemberCallExpr(CXXMemberCallExpr *C, 1761c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu AddStmtChoice asc) { 1762ad5a894df1841698c824381b414630799adc26caTed Kremenek AddStmtChoice::Kind K = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 176321f6d6ea71b89aeae6b9262c8cbdff7f6328e749Zhongxing Xu : AddStmtChoice::AlwaysAdd; 1764c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu autoCreateBlock(); 176521f6d6ea71b89aeae6b9262c8cbdff7f6328e749Zhongxing Xu AppendStmt(Block, C, AddStmtChoice(K)); 1766c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitChildren(C); 1767c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu} 1768c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 176919bb356317952445b03ee341c02f6147083c9eeaTed KremenekCFGBlock* CFGBuilder::VisitIndirectGotoStmt(IndirectGotoStmt* I) { 17706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Lazily create the indirect-goto dispatch block if there isn't one already. 177119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek CFGBlock* IBlock = cfg->getIndirectGotoBlock(); 17726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 177319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek if (!IBlock) { 177419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek IBlock = createBlock(false); 177519bb356317952445b03ee341c02f6147083c9eeaTed Kremenek cfg->setIndirectGotoBlock(IBlock); 177619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 17776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 177819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // IndirectGoto is a control-flow statement. Thus we stop processing the 177919bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // current block and create a new one. 1780d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 17814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 17824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 178319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block = createBlock(false); 178419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block->setTerminator(I); 1785ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, IBlock); 178619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek return addStmt(I->getTarget()); 178719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek} 178819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 1789befef2f69759d7338e2b7c5ce6c8b6f47fe6e667Ted Kremenek} // end anonymous namespace 1790026473c2175424a039f51ca8949937268721b965Ted Kremenek 17916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// createBlock - Constructs and adds a new CFGBlock to the CFG. The block has 17926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// no successors or predecessors. If this is the first block created in the 17936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// CFG, it is automatically set to be the Entry and Exit of the CFG. 17949438252ad2ecae5338df565ca33c6969e4fbfa41Ted KremenekCFGBlock* CFG::createBlock() { 1795026473c2175424a039f51ca8949937268721b965Ted Kremenek bool first_block = begin() == end(); 1796026473c2175424a039f51ca8949937268721b965Ted Kremenek 1797026473c2175424a039f51ca8949937268721b965Ted Kremenek // Create the block. 1798ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek CFGBlock *Mem = getAllocator().Allocate<CFGBlock>(); 1799ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek new (Mem) CFGBlock(NumBlockIDs++, BlkBVC); 1800ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Blocks.push_back(Mem, BlkBVC); 1801026473c2175424a039f51ca8949937268721b965Ted Kremenek 1802026473c2175424a039f51ca8949937268721b965Ted Kremenek // If this is the first block, set it as the Entry and Exit. 1803ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (first_block) 1804ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Entry = Exit = &back(); 1805026473c2175424a039f51ca8949937268721b965Ted Kremenek 1806026473c2175424a039f51ca8949937268721b965Ted Kremenek // Return the block. 1807ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek return &back(); 1808026473c2175424a039f51ca8949937268721b965Ted Kremenek} 1809026473c2175424a039f51ca8949937268721b965Ted Kremenek 1810026473c2175424a039f51ca8949937268721b965Ted Kremenek/// buildCFG - Constructs a CFG from an AST. Ownership of the returned 1811026473c2175424a039f51ca8949937268721b965Ted Kremenek/// CFG is returned to the caller. 1812b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFG::buildCFG(const Decl *D, Stmt* Statement, ASTContext *C, 1813ad5a894df1841698c824381b414630799adc26caTed Kremenek bool PruneTriviallyFalse, 1814fe255bc6dfddade15644aecead970791e96ddedcTed Kremenek bool AddEHEdges) { 1815fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBuilder Builder; 1816ad5a894df1841698c824381b414630799adc26caTed Kremenek return Builder.buildCFG(D, Statement, C, PruneTriviallyFalse, 1817fe255bc6dfddade15644aecead970791e96ddedcTed Kremenek AddEHEdges); 1818fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek} 1819fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 182063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 182163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek// CFG: Queries for BlkExprs. 182263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 182363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 182463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremeneknamespace { 182586946745225096243f6969dc745267b78fc211a6Ted Kremenek typedef llvm::DenseMap<const Stmt*,unsigned> BlkExprMapTy; 182663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 182763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 18288a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenekstatic void FindSubExprAssignments(Stmt *S, 18298a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek llvm::SmallPtrSet<Expr*,50>& Set) { 18308a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!S) 183133d4aab80f31bd06257526fe2883ea920529456bTed Kremenek return; 18326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18338a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek for (Stmt::child_iterator I=S->child_begin(), E=S->child_end(); I!=E; ++I) { 1834ad5a894df1841698c824381b414630799adc26caTed Kremenek Stmt *child = *I; 18358a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!child) 18368a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek continue; 1837ad5a894df1841698c824381b414630799adc26caTed Kremenek 18388a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(child)) 183933d4aab80f31bd06257526fe2883ea920529456bTed Kremenek if (B->isAssignmentOp()) Set.insert(B); 18406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18418a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek FindSubExprAssignments(child, Set); 184233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 184333d4aab80f31bd06257526fe2883ea920529456bTed Kremenek} 184433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek 184563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekstatic BlkExprMapTy* PopulateBlkExprMap(CFG& cfg) { 184663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = new BlkExprMapTy(); 18476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Look for assignments that are used as subexpressions. These are the only 18496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // assignments that we want to *possibly* register as a block-level 18506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression. Basically, if an assignment occurs both in a subexpression and 18516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // at the block-level, it is a block-level expression. 185233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek llvm::SmallPtrSet<Expr*,50> SubExprAssignments; 18536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 185463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) 1855ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 185633d4aab80f31bd06257526fe2883ea920529456bTed Kremenek FindSubExprAssignments(*BI, SubExprAssignments); 185786946745225096243f6969dc745267b78fc211a6Ted Kremenek 1858411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) { 18596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Iterate over the statements again on identify the Expr* and Stmt* at the 18616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block-level that are block-level expressions. 1862411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 1863ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 1864411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (Expr* Exp = dyn_cast<Expr>(*BI)) { 18656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1866411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(Exp)) { 186733d4aab80f31bd06257526fe2883ea920529456bTed Kremenek // Assignment expressions that are not nested within another 18686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression are really "statements" whose value is never used by 18696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // another expression. 1870411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (B->isAssignmentOp() && !SubExprAssignments.count(Exp)) 187133d4aab80f31bd06257526fe2883ea920529456bTed Kremenek continue; 18726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (const StmtExpr* Terminator = dyn_cast<StmtExpr>(Exp)) { 18736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Special handling for statement expressions. The last statement in 18746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the statement expression is also a block-level expr. 1875411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek const CompoundStmt* C = Terminator->getSubStmt(); 187686946745225096243f6969dc745267b78fc211a6Ted Kremenek if (!C->body_empty()) { 187733d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 187886946745225096243f6969dc745267b78fc211a6Ted Kremenek (*M)[C->body_back()] = x; 187986946745225096243f6969dc745267b78fc211a6Ted Kremenek } 188086946745225096243f6969dc745267b78fc211a6Ted Kremenek } 1881e2dcd783a04f654c50bd8b13fb08a440afbd67e7Ted Kremenek 188233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 1883411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek (*M)[Exp] = x; 188433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 18856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1886411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek // Look at terminators. The condition is a block-level expression. 18876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1888ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Stmt* S = (*I)->getTerminatorCondition(); 18896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1890390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek if (S && M->find(S) == M->end()) { 1891411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek unsigned x = M->size(); 1892390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek (*M)[S] = x; 1893411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 1894411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 18956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 189686946745225096243f6969dc745267b78fc211a6Ted Kremenek return M; 189763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 189863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 189986946745225096243f6969dc745267b78fc211a6Ted KremenekCFG::BlkExprNumTy CFG::getBlkExprNum(const Stmt* S) { 190086946745225096243f6969dc745267b78fc211a6Ted Kremenek assert(S != NULL); 190163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (!BlkExprMap) { BlkExprMap = (void*) PopulateBlkExprMap(*this); } 19026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 190363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = reinterpret_cast<BlkExprMapTy*>(BlkExprMap); 190486946745225096243f6969dc745267b78fc211a6Ted Kremenek BlkExprMapTy::iterator I = M->find(S); 19053fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek return (I == M->end()) ? CFG::BlkExprNumTy() : CFG::BlkExprNumTy(I->second); 190663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 19077dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 190863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekunsigned CFG::getNumBlkExprs() { 190963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (const BlkExprMapTy* M = reinterpret_cast<const BlkExprMapTy*>(BlkExprMap)) 191063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return M->size(); 191163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek else { 191263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // We assume callers interested in the number of BlkExprs will want 191363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // the map constructed if it doesn't already exist. 191463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMap = (void*) PopulateBlkExprMap(*this); 191563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return reinterpret_cast<BlkExprMapTy*>(BlkExprMap)->size(); 191663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek } 191763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 191863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 1919274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1920ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek// Filtered walking of the CFG. 1921ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek//===----------------------------------------------------------------------===// 1922ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1923ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenekbool CFGBlock::FilterEdge(const CFGBlock::FilterOptions &F, 1924be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const CFGBlock *From, const CFGBlock *To) { 1925ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1926ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek if (F.IgnoreDefaultsWithCoveredEnums) { 1927ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek // If the 'To' has no label or is labeled but the label isn't a 1928ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek // CaseStmt then filter this edge. 1929ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek if (const SwitchStmt *S = 1930be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek dyn_cast_or_null<SwitchStmt>(From->getTerminator())) { 1931ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek if (S->isAllEnumCasesCovered()) { 1932be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const Stmt *L = To->getLabel(); 1933be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek if (!L || !isa<CaseStmt>(L)) 1934be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek return true; 1935ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 1936ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 1937ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 1938ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1939ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek return false; 1940ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek} 1941ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1942ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek//===----------------------------------------------------------------------===// 1943274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek// Cleanup: CFG dstor. 1944274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1945274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek 194663f5887f316fb52d243fcbb3631c039de6c4b993Ted KremenekCFG::~CFG() { 194763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek delete reinterpret_cast<const BlkExprMapTy*>(BlkExprMap); 194863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 19496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19507dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 19517dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG pretty printing 19527dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 19537dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 195442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremeneknamespace { 19552bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek 1956ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass StmtPrinterHelper : public PrinterHelper { 195742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek typedef llvm::DenseMap<Stmt*,std::pair<unsigned,unsigned> > StmtMapTy; 195842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtMapTy StmtMap; 195942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek signed CurrentBlock; 196042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned CurrentStmt; 1961e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LangOpts; 196242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenekpublic: 19631c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek 1964e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper(const CFG* cfg, const LangOptions &LO) 1965e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner : CurrentBlock(0), CurrentStmt(0), LangOpts(LO) { 196642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFG::const_iterator I = cfg->begin(), E = cfg->end(); I != E; ++I ) { 196742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned j = 1; 1968ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::const_iterator BI = (*I)->begin(), BEnd = (*I)->end() ; 196942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek BI != BEnd; ++BI, ++j ) 1970ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek StmtMap[*BI] = std::make_pair((*I)->getBlockID(),j); 197142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 1972fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 19736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 197442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek virtual ~StmtPrinterHelper() {} 19756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1976e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &getLangOpts() const { return LangOpts; } 197742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setBlockID(signed i) { CurrentBlock = i; } 197842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setStmtID(unsigned i) { CurrentStmt = i; } 19796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1980a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek virtual bool handledStmt(Stmt* Terminator, llvm::raw_ostream& OS) { 19816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1982411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek StmtMapTy::iterator I = StmtMap.find(Terminator); 1983fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 198442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (I == StmtMap.end()) 198542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (CurrentBlock >= 0 && I->second.first == (unsigned) CurrentBlock 19883fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek && I->second.second == CurrentStmt) { 198942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19903fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek } 19916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19923fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "[B" << I->second.first << "." << I->second.second << "]"; 19931c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return true; 199442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 199542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek}; 1996e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 1997e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 1998e8ee26b49d68ae3ffdf9a990ff7511ef55afa04cTed Kremenek 1999e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnernamespace { 2000ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass CFGBlockTerminatorPrint 20016fa9b88e2c3d47d606a273df2f8d03509bcff0b9Ted Kremenek : public StmtVisitor<CFGBlockTerminatorPrint,void> { 20026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2003a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_ostream& OS; 200442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtPrinterHelper* Helper; 2005d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor PrintingPolicy Policy; 2006d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenekpublic: 2007d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor CFGBlockTerminatorPrint(llvm::raw_ostream& os, StmtPrinterHelper* helper, 2008e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const PrintingPolicy &Policy) 2009d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor : OS(os), Helper(helper), Policy(Policy) {} 20106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2011d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitIfStmt(IfStmt* I) { 2012d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "if "; 2013d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getCond()->printPretty(OS,Helper,Policy); 2014d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2016d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Default case. 20176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump void VisitStmt(Stmt* Terminator) { 20186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Terminator->printPretty(OS, Helper, Policy); 20196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 20206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2021d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitForStmt(ForStmt* F) { 2022d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "for (" ; 20233fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInit()) 20243fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 2025535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 20263fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = F->getCond()) 20273fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 2028535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 20293fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInc()) 20303fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 2031a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << ")"; 2032d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2034d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitWhileStmt(WhileStmt* W) { 2035d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "while " ; 20363fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = W->getCond()) 20373fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 2038d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2040d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitDoStmt(DoStmt* D) { 2041d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "do ... while "; 20423fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = D->getCond()) 20433fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 20449da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 20456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2046411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek void VisitSwitchStmt(SwitchStmt* Terminator) { 20479da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek OS << "switch "; 2048d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor Terminator->getCond()->printPretty(OS, Helper, Policy); 20499da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 20506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20515d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump void VisitCXXTryStmt(CXXTryStmt* CS) { 20525d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "try ..."; 20535d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 20545d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 2055805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitConditionalOperator(ConditionalOperator* C) { 2056d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 20576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << " ? ... : ..."; 2058805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2060aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek void VisitChooseExpr(ChooseExpr* C) { 2061aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek OS << "__builtin_choose_expr( "; 2062d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 2063a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " )"; 2064aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek } 20656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20661c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek void VisitIndirectGotoStmt(IndirectGotoStmt* I) { 20671c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "goto *"; 2068d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getTarget()->printPretty(OS, Helper, Policy); 20691c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2071805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitBinaryOperator(BinaryOperator* B) { 2072805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek if (!B->isLogicalOp()) { 2073805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek VisitExpr(B); 2074805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2075805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2077d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor B->getLHS()->printPretty(OS, Helper, Policy); 20786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2079805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek switch (B->getOpcode()) { 20802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: 2081a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " || ..."; 2082805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 20832de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 2084a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " && ..."; 2085805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2086805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek default: 2087805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek assert(false && "Invalid logical operator."); 20886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2089805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20910b1d9b7557437176f9cea1283bfac2510812beceTed Kremenek void VisitExpr(Expr* E) { 2092d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor E->printPretty(OS, Helper, Policy); 20936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2094d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2095e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 2096e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 20976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2098e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_stmt(llvm::raw_ostream &OS, StmtPrinterHelper* Helper, 2099079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump const CFGElement &E) { 21004e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek Stmt *S = E; 21014e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek 21021c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Helper) { 21031c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for statement-expressions. 21044e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (StmtExpr* SE = dyn_cast<StmtExpr>(S)) { 21051c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek CompoundStmt* Sub = SE->getSubStmt(); 21066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21071c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Sub->child_begin() != Sub->child_end()) { 210860266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << "({ ... ; "; 21097a9d9d71fa208dc23fd67d03ce052d4ef60a8d04Ted Kremenek Helper->handledStmt(*SE->getSubStmt()->body_rbegin(),OS); 211060266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << " })\n"; 21111c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 21121c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21131c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21151c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for comma expressions. 21164e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(S)) { 21172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (B->getOpcode() == BO_Comma) { 21181c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "... , "; 21191c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek Helper->handledStmt(B->getRHS(),OS); 21201c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << '\n'; 21211c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 21226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 21236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 21241c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21264e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek S->printPretty(OS, Helper, PrintingPolicy(Helper->getLangOpts())); 21274e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek 21284e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (isa<CXXOperatorCallExpr>(S)) { 21294e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek OS << " (OperatorCall)"; 21304e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek } 21314e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek else if (isa<CXXBindTemporaryExpr>(S)) { 21324e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek OS << " (BindTemporary)"; 21334e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek } 21344e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek 21356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21361c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // Expressions need a newline. 21374e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (isa<Expr>(S)) 21384e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek OS << '\n'; 21391c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek} 21406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2141e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_block(llvm::raw_ostream& OS, const CFG* cfg, 2142e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const CFGBlock& B, 2143e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper* Helper, bool print_edges) { 21446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 214542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(B.getBlockID()); 21466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21477dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Print the header. 21486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << "\n [ B" << B.getBlockID(); 21496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 215042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (&B == &cfg->getEntry()) 215142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (ENTRY) ]\n"; 215242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == &cfg->getExit()) 215342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (EXIT) ]\n"; 215442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == cfg->getIndirectGotoBlock()) 21557dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OS << " (INDIRECT GOTO DISPATCH) ]\n"; 215642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else 215742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " ]\n"; 21586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21599cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the label of this block. 2160079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Stmt* Label = const_cast<Stmt*>(B.getLabel())) { 216142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 216242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 216342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 21646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2165079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (LabelStmt* L = dyn_cast<LabelStmt>(Label)) 21669cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << L->getName(); 2167079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 21689cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "case "; 2169e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(OS, Helper, 2170e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21719cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (C->getRHS()) { 21729cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " ... "; 2173e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getRHS()->printPretty(OS, Helper, 2174e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21759cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 2176079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } else if (isa<DefaultStmt>(Label)) 21779cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "default"; 2178079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CXXCatchStmt *CS = dyn_cast<CXXCatchStmt>(Label)) { 21795d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "catch ("; 2180a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl()) 2181a1f93631a84621d77aeb627691da85a8991af188Mike Stump CS->getExceptionDecl()->print(OS, PrintingPolicy(Helper->getLangOpts()), 2182a1f93631a84621d77aeb627691da85a8991af188Mike Stump 0); 2183a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 2184a1f93631a84621d77aeb627691da85a8991af188Mike Stump OS << "..."; 21855d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << ")"; 21865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 21875d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else 218842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek assert(false && "Invalid label statement in CFGBlock."); 21896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21909cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << ":\n"; 21919cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 21926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2193fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // Iterate through the statements in the block and print them. 2194fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned j = 1; 21956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 219642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_iterator I = B.begin(), E = B.end() ; 219742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E ; ++I, ++j ) { 21986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21999cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the statement # in the basic block and the statement itself. 220042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 220142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 22026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2203a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek OS << llvm::format("%3d", j) << ": "; 22046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 220542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) 220642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek Helper->setStmtID(j); 22076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22081c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek print_stmt(OS,Helper,*I); 2209fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22119cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the terminator of this block. 221242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (B.getTerminator()) { 221342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 221442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 22156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22169cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " T: "; 22176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 221842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(-1); 22196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2220e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, Helper, 2221e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 222242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek TPrinter.Visit(const_cast<Stmt*>(B.getTerminator())); 2223a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << '\n'; 2224fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22269cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (print_edges) { 22279cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the predecessors of this block. 222842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Predecessors (" << B.pred_size() << "):"; 22299cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek unsigned i = 0; 223042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 223142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_pred_iterator I = B.pred_begin(), E = B.pred_end(); 223242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 22336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 223442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) == 0) 22359cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 22366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22379cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " B" << (*I)->getBlockID(); 22389cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 22396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22409cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 22416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22429cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the successors of this block. 224342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Successors (" << B.succ_size() << "):"; 22449cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek i = 0; 224542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 224642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_succ_iterator I = B.succ_begin(), E = B.succ_end(); 224742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 22486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 224942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) % 10 == 0) 22509cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 225142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2252e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (*I) 2253e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " B" << (*I)->getBlockID(); 2254e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump else 2255e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " NULL"; 2256fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22589cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 2259fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 226142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 226242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 226342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simple pretty printer of a CFG that outputs to stderr. 2264e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::dump(const LangOptions &LO) const { print(llvm::errs(), LO); } 226542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 226642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFG that outputs to an ostream. 2267e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::print(llvm::raw_ostream &OS, const LangOptions &LO) const { 2268e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(this, LO); 22696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 227042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the entry block. 227142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getEntry(), &Helper, true); 22726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 227342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Iterate through the CFGBlocks and print them one by one. 227442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (const_iterator I = Blocks.begin(), E = Blocks.end() ; I != E ; ++I) { 227542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Skip the entry block, because we already printed it. 2276ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (&(**I) == &getEntry() || &(**I) == &getExit()) 227742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek continue; 22786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2279ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek print_block(OS, this, **I, &Helper, true); 228042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 22816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 228242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the exit block. 228342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getExit(), &Helper, true); 2284d0172439194b28bae62a94a0a25d58e6d21e7a14Ted Kremenek OS.flush(); 22856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 228642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 228742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simply pretty printer of a CFGBlock that outputs to stderr. 2288e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::dump(const CFG* cfg, const LangOptions &LO) const { 2289e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner print(llvm::errs(), cfg, LO); 2290e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} 229142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 229242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFGBlock that outputs to an ostream. 229342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// Generally this will only be called from CFG::print. 2294e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::print(llvm::raw_ostream& OS, const CFG* cfg, 2295e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LO) const { 2296e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(cfg, LO); 229742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, cfg, *this, &Helper, true); 2298026473c2175424a039f51ca8949937268721b965Ted Kremenek} 22997dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2300a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek/// printTerminator - A simple pretty printer of the terminator of a CFGBlock. 2301e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::printTerminator(llvm::raw_ostream &OS, 23026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump const LangOptions &LO) const { 2303e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, NULL, PrintingPolicy(LO)); 2304a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek TPrinter.Visit(const_cast<Stmt*>(getTerminator())); 2305a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek} 2306a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 2307390e48b15ad93f85bfd1e33b9992c198fa0db475Ted KremenekStmt* CFGBlock::getTerminatorCondition() { 23086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2309411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (!Terminator) 2310411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return NULL; 23116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2312411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek Expr* E = NULL; 23136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2314411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek switch (Terminator->getStmtClass()) { 2315411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek default: 2316411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2318411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ForStmtClass: 2319411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ForStmt>(Terminator)->getCond(); 2320411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2322411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::WhileStmtClass: 2323411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<WhileStmt>(Terminator)->getCond(); 2324411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2326411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::DoStmtClass: 2327411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<DoStmt>(Terminator)->getCond(); 2328411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2330411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IfStmtClass: 2331411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IfStmt>(Terminator)->getCond(); 2332411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2334411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ChooseExprClass: 2335411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ChooseExpr>(Terminator)->getCond(); 2336411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2338411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IndirectGotoStmtClass: 2339411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IndirectGotoStmt>(Terminator)->getTarget(); 2340411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2342411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::SwitchStmtClass: 2343411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<SwitchStmt>(Terminator)->getCond(); 2344411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2346411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ConditionalOperatorClass: 2347411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ConditionalOperator>(Terminator)->getCond(); 2348411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2350411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::BinaryOperatorClass: // '&&' and '||' 2351411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<BinaryOperator>(Terminator)->getLHS(); 2352390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek break; 23536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2354390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 23556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Terminator; 2356411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 23576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2358411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return E ? E->IgnoreParens() : NULL; 2359411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek} 2360411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 23619c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenekbool CFGBlock::hasBinaryBranchTerminator() const { 23626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23639c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek if (!Terminator) 23649c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23669c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek Expr* E = NULL; 23676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23689c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek switch (Terminator->getStmtClass()) { 23699c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek default: 23709c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump case Stmt::ForStmtClass: 23739c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::WhileStmtClass: 23749c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::DoStmtClass: 23759c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::IfStmtClass: 23769c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ChooseExprClass: 23779c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ConditionalOperatorClass: 23789c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::BinaryOperatorClass: 23796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return true; 23809c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek } 23816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23829c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return E ? E->IgnoreParens() : NULL; 23839c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek} 23849c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek 2385a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 23867dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23877dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG Graphviz Visualization 23887dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23897dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 239042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 239142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 23926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumpstatic StmtPrinterHelper* GraphHelper; 239342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 239442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2395e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::viewCFG(const LangOptions &LO) const { 239642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 2397e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper H(this, LO); 239842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = &H; 239942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek llvm::ViewGraph(this,"CFG"); 240042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = NULL; 240142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 240242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek} 240342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 24047dba8607e59096014b7139ff20ef00870041d518Ted Kremeneknamespace llvm { 24057dba8607e59096014b7139ff20ef00870041d518Ted Kremenektemplate<> 24067dba8607e59096014b7139ff20ef00870041d518Ted Kremenekstruct DOTGraphTraits<const CFG*> : public DefaultDOTGraphTraits { 2407006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2408006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 2409006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2410006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const CFGBlock* Node, const CFG* Graph) { 24117dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2412bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#ifndef NDEBUG 2413a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string OutSStr; 2414a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_string_ostream Out(OutSStr); 241542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(Out,Graph, *Node, GraphHelper, false); 2416a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string& OutStr = Out.str(); 24177dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 24187dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); 24197dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 24207dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Process string output to make it nicer... 24217dba8607e59096014b7139ff20ef00870041d518Ted Kremenek for (unsigned i = 0; i != OutStr.length(); ++i) 24227dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[i] == '\n') { // Left justify 24237dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr[i] = '\\'; 24247dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr.insert(OutStr.begin()+i+1, 'l'); 24257dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 24266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 24277dba8607e59096014b7139ff20ef00870041d518Ted Kremenek return OutStr; 2428bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#else 2429bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser return ""; 2430bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#endif 24317dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 24327dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 24337dba8607e59096014b7139ff20ef00870041d518Ted Kremenek} // end namespace llvm 2434