CFG.cpp revision 49b4ef364ba042f7db2ba567310fb49917ad0086
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 9449b4ef364ba042f7db2ba567310fb49917ad0086Zhongxing Xu bool badCFG; 9549b4ef364ba042f7db2ba567310fb49917ad0086Zhongxing Xu CFG::BuildOptions BuildOpts; 9649b4ef364ba042f7db2ba567310fb49917ad0086Zhongxing Xu 976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumppublic: 98ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek explicit CFGBuilder() : cfg(new CFG()), // crew a new CFG 99ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Block(NULL), Succ(NULL), 1008a294713e032e4a27bae61c040abb41397952676Ted Kremenek ContinueTargetBlock(NULL), BreakTargetBlock(NULL), 1015d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump SwitchTerminatedBlock(NULL), DefaultCaseBlock(NULL), 10249b4ef364ba042f7db2ba567310fb49917ad0086Zhongxing Xu TryTerminatedBlock(NULL), badCFG(false) {} 1036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 104d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // buildCFG - Used by external clients to construct the CFG. 105ad5a894df1841698c824381b414630799adc26caTed Kremenek CFG* buildCFG(const Decl *D, Stmt *Statement, ASTContext *C, 1066c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek CFG::BuildOptions BO); 1076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenekprivate: 1094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Visitors to walk an AST and construct the CFG. 110852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitAddrLabelExpr(AddrLabelExpr *A, AddStmtChoice asc); 111852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBinaryOperator(BinaryOperator *B, AddStmtChoice asc); 112852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBlockExpr(BlockExpr* E, AddStmtChoice asc); 1134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitBreakStmt(BreakStmt *B); 1147ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXCatchStmt(CXXCatchStmt *S); 1157ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXThrowExpr(CXXThrowExpr *T); 1167ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXTryStmt(CXXTryStmt *S); 117c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu CFGBlock *VisitCXXMemberCallExpr(CXXMemberCallExpr *C, AddStmtChoice asc); 118852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitCallExpr(CallExpr *C, AddStmtChoice asc); 1194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitCaseStmt(CaseStmt *C); 120852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitChooseExpr(ChooseExpr *C, AddStmtChoice asc); 1213fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitCompoundStmt(CompoundStmt *C); 1227ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitConditionalOperator(ConditionalOperator *C, AddStmtChoice asc); 1233fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitContinueStmt(ContinueStmt *C); 1244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclStmt(DeclStmt *DS); 1254f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclSubExpr(Decl* D); 1263fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDefaultStmt(DefaultStmt *D); 1273fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDoStmt(DoStmt *D); 1283fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitForStmt(ForStmt *F); 1294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitGotoStmt(GotoStmt* G); 1304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIfStmt(IfStmt *I); 1314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIndirectGotoStmt(IndirectGotoStmt *I); 1324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitLabelStmt(LabelStmt *L); 133115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock *VisitMemberExpr(MemberExpr *M, AddStmtChoice asc); 1344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtCatchStmt(ObjCAtCatchStmt *S); 1354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S); 1364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtThrowStmt(ObjCAtThrowStmt *S); 1374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtTryStmt(ObjCAtTryStmt *S); 1384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCForCollectionStmt(ObjCForCollectionStmt *S); 1394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitReturnStmt(ReturnStmt* R); 140852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, AddStmtChoice asc); 141852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmtExpr(StmtExpr *S, AddStmtChoice asc); 1424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitSwitchStmt(SwitchStmt *S); 1434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitWhileStmt(WhileStmt *W); 1444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 145852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *Visit(Stmt *S, AddStmtChoice asc = AddStmtChoice::NotAlwaysAdd); 146852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmt(Stmt *S, AddStmtChoice asc); 1474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitChildren(Stmt* S); 148cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 149274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek // NYS == Not Yet Supported 150274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek CFGBlock* NYS() { 1514102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = true; 1524102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek return Block; 1534102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek } 1546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek void autoCreateBlock() { if (!Block) Block = createBlock(); } 1564f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *createBlock(bool add_successor = true); 157d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu 158df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock *addStmt(Stmt *S) { 159df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu return Visit(S, AddStmtChoice::AlwaysAdd); 160852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 161ad5a894df1841698c824381b414630799adc26caTed Kremenek 162852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek void AppendStmt(CFGBlock *B, Stmt *S, 163852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { 164852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek B->appendStmt(S, cfg->getBumpVectorContext(), asc.asLValue()); 165ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 166ad5a894df1841698c824381b414630799adc26caTed Kremenek 167ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek void AddSuccessor(CFGBlock *B, CFGBlock *S) { 168ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek B->addSuccessor(S, cfg->getBumpVectorContext()); 169ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 1701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 171fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// TryResult - a class representing a variant over the values 172fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// 'true', 'false', or 'unknown'. This is returned by TryEvaluateBool, 173fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// and is used by the CFGBuilder to decide if a branch condition 174fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// can be decided up front during CFG construction. 175941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek class TryResult { 176941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek int X; 177941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek public: 178941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult(bool b) : X(b ? 1 : 0) {} 179941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult() : X(-1) {} 1801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 181941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isTrue() const { return X == 1; } 182941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isFalse() const { return X == 0; } 183941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isKnown() const { return X >= 0; } 184941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek void negate() { 185941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(isKnown()); 186941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek X ^= 0x1; 187941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek } 188941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek }; 1891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19000998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// TryEvaluateBool - Try and evaluate the Stmt and return 0 or 1 19100998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// if we can evaluate to a known value, otherwise return -1. 192941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult TryEvaluateBool(Expr *S) { 1936c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek if (!BuildOpts.PruneTriviallyFalseEdges) 194ad5a894df1841698c824381b414630799adc26caTed Kremenek return TryResult(); 195ad5a894df1841698c824381b414630799adc26caTed Kremenek 19600998a068e50945118f334c98af05ed44d7c22a6Mike Stump Expr::EvalResult Result; 1979983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor if (!S->isTypeDependent() && !S->isValueDependent() && 1989983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor S->Evaluate(Result, *Context) && Result.Val.isInt()) 199fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek return Result.Val.getInt().getBoolValue(); 200941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek 201941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return TryResult(); 20200998a068e50945118f334c98af05ed44d7c22a6Mike Stump } 203d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 205898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// FIXME: Add support for dependent-sized array types in C++? 206898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// Does it even make sense to build a CFG for an uninstantiated template? 207610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenekstatic VariableArrayType* FindVA(Type* t) { 208610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek while (ArrayType* vt = dyn_cast<ArrayType>(t)) { 209610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt)) 210610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (vat->getSizeExpr()) 211610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return vat; 2126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 213610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek t = vt->getElementType().getTypePtr(); 214610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek } 2156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 216610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return 0; 217610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek} 2186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// BuildCFG - Constructs a CFG from an AST (a Stmt*). The AST can represent an 2206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// arbitrary statement. Examples include a single expression or a function 2216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// body (compound statement). The ownership of the returned CFG is 2226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// transferred to the caller. If CFG construction fails, this method returns 2236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// NULL. 224b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFGBuilder::buildCFG(const Decl *D, Stmt* Statement, ASTContext* C, 2256c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek CFG::BuildOptions BO) { 226ad5a894df1841698c824381b414630799adc26caTed Kremenek 227e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump Context = C; 2280ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek assert(cfg.get()); 2294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!Statement) 2304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return NULL; 231d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 2326c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek BuildOpts = BO; 2336c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek if (!C->getLangOptions().CPlusPlus) 2346c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek BuildOpts.AddImplicitDtors = false; 2356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block that will serve as the exit block for the CFG. Since 2376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // this is the first block added to the CFG, it will be implicitly registered 2386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // as the exit block. 23949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = createBlock(); 240ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek assert(Succ == &cfg->getExit()); 24149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; // the EXIT block is empty. Create all other blocks lazily. 2426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 243d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Visit the statements and create the CFG. 2441b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu CFGBlock *B = addStmt(Statement); 2451b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2461b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (badCFG) 2471b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu return NULL; 2481b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2491b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (B) 2501b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu Succ = B; 251b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump 252b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump if (const CXXConstructorDecl *CD = dyn_cast_or_null<CXXConstructorDecl>(D)) { 253b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump // FIXME: Add code for base initializers and member initializers. 254b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump (void)CD; 255b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump } 2566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2571b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // Backpatch the gotos whose label -> block mappings we didn't know when we 2581b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // encountered them. 2591b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu for (BackpatchBlocksTy::iterator I = BackpatchBlocks.begin(), 2601b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu E = BackpatchBlocks.end(); I != E; ++I ) { 261c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar 2621b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu CFGBlock* B = *I; 2631b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu GotoStmt* G = cast<GotoStmt>(B->getTerminator()); 2641b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu LabelMapTy::iterator LI = LabelMap.find(G->getLabel()); 2656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2661b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // If there is no target for the goto, then we are looking at an 2671b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // incomplete AST. Handle this by not registering a successor. 2681b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (LI == LabelMap.end()) continue; 269d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 2701b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu AddSuccessor(B, LI->second); 2711b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu } 2726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2731b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // Add successors to the Indirect Goto Dispatch block (if we have one). 2741b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (CFGBlock* B = cfg->getIndirectGotoBlock()) 2751b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu for (LabelSetTy::iterator I = AddressTakenLabels.begin(), 2761b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu E = AddressTakenLabels.end(); I != E; ++I ) { 2771b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2781b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // Lookup the target block. 2791b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu LabelMapTy::iterator LI = LabelMap.find(*I); 2801b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 2811b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // If there is no target block that contains label, then we are looking 2821b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu // at an incomplete AST. Handle this by not registering a successor. 2831b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu if (LI == LabelMap.end()) continue; 2841b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu 285c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar AddSuccessor(B, LI->second); 286c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 2876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty entry block that has no predecessors. 289322f58d3830da13b419646c071e3ab801518a09cTed Kremenek cfg->setEntry(createBlock()); 2906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2911b3b7cb15cbd02b7283bbf3ce7c0e9b0da30ef9dZhongxing Xu return cfg.take(); 292d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 2936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 294d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// createBlock - Used to lazily create blocks that are connected 295d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// to the current (global) succcessor. 2966d9828c82c9321f042ab416fd2ffaa3034347d45Mike StumpCFGBlock* CFGBuilder::createBlock(bool add_successor) { 2979438252ad2ecae5338df565ca33c6969e4fbfa41Ted Kremenek CFGBlock* B = cfg->createBlock(); 2984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (add_successor && Succ) 299ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(B, Succ); 300d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return B; 301d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 3034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// Visit - Walk the subtree of a statement and add extra 3046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// blocks for ternary operators, &&, and ||. We also process "," and 3056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// DeclStmts (which may contain nested control-flow). 306852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::Visit(Stmt * S, AddStmtChoice asc) { 3074f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenektryAgain: 308f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek if (!S) { 309f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek badCFG = true; 310f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek return 0; 311f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek } 3124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek switch (S->getStmtClass()) { 3134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek default: 314852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, asc); 3154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::AddrLabelExprClass: 317852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitAddrLabelExpr(cast<AddrLabelExpr>(S), asc); 3181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BinaryOperatorClass: 320852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBinaryOperator(cast<BinaryOperator>(S), asc); 3211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BlockExprClass: 323852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBlockExpr(cast<BlockExpr>(S), asc); 3244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3254f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BreakStmtClass: 3264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitBreakStmt(cast<BreakStmt>(S)); 3271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CallExprClass: 329a427f1d8f0848997029d1bdc0c5c137f982f775dTed Kremenek case Stmt::CXXOperatorCallExprClass: 330852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitCallExpr(cast<CallExpr>(S), asc); 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CaseStmtClass: 3334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCaseStmt(cast<CaseStmt>(S)); 3344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ChooseExprClass: 336852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitChooseExpr(cast<ChooseExpr>(S), asc); 3371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CompoundStmtClass: 3394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(cast<CompoundStmt>(S)); 3401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ConditionalOperatorClass: 342852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitConditionalOperator(cast<ConditionalOperator>(S), asc); 3431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ContinueStmtClass: 3454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitContinueStmt(cast<ContinueStmt>(S)); 3461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 347021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXCatchStmtClass: 348021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXCatchStmt(cast<CXXCatchStmt>(S)); 349021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek 35047e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek case Stmt::CXXExprWithTemporariesClass: { 35147e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek // FIXME: Handle temporaries. For now, just visit the subexpression 35247e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek // so we don't artificially create extra blocks. 353a427f1d8f0848997029d1bdc0c5c137f982f775dTed Kremenek return Visit(cast<CXXExprWithTemporaries>(S)->getSubExpr(), asc); 35447e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek } 35547e331ed28c2536bec227c5e2fa094ab3d46eed1Ted Kremenek 356c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu case Stmt::CXXMemberCallExprClass: 357c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitCXXMemberCallExpr(cast<CXXMemberCallExpr>(S), asc); 358c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 359021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXThrowExprClass: 360021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXThrowExpr(cast<CXXThrowExpr>(S)); 361ad5a894df1841698c824381b414630799adc26caTed Kremenek 362021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXTryStmtClass: 363021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXTryStmt(cast<CXXTryStmt>(S)); 364ad5a894df1841698c824381b414630799adc26caTed Kremenek 3654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DeclStmtClass: 3664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclStmt(cast<DeclStmt>(S)); 3671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3684f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DefaultStmtClass: 3694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDefaultStmt(cast<DefaultStmt>(S)); 3701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DoStmtClass: 3724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDoStmt(cast<DoStmt>(S)); 3731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ForStmtClass: 3754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitForStmt(cast<ForStmt>(S)); 3761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::GotoStmtClass: 3784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitGotoStmt(cast<GotoStmt>(S)); 3791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IfStmtClass: 3814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIfStmt(cast<IfStmt>(S)); 3821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3834f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IndirectGotoStmtClass: 3844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIndirectGotoStmt(cast<IndirectGotoStmt>(S)); 3851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::LabelStmtClass: 3874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitLabelStmt(cast<LabelStmt>(S)); 3881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 389115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek case Stmt::MemberExprClass: 390115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return VisitMemberExpr(cast<MemberExpr>(S), asc); 391115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 3924f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtCatchStmtClass: 3931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return VisitObjCAtCatchStmt(cast<ObjCAtCatchStmt>(S)); 3941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 3964f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S)); 3971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtThrowStmtClass: 3994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtThrowStmt(cast<ObjCAtThrowStmt>(S)); 4001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtTryStmtClass: 4024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtTryStmt(cast<ObjCAtTryStmt>(S)); 4031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4044f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCForCollectionStmtClass: 4054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S)); 4061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4074f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ParenExprClass: 4084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek S = cast<ParenExpr>(S)->getSubExpr(); 4091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump goto tryAgain; 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::NullStmtClass: 4124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ReturnStmtClass: 4154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitReturnStmt(cast<ReturnStmt>(S)); 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SizeOfAlignOfExprClass: 418852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitSizeOfAlignOfExpr(cast<SizeOfAlignOfExpr>(S), asc); 4191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::StmtExprClass: 421852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmtExpr(cast<StmtExpr>(S), asc); 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SwitchStmtClass: 4244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitSwitchStmt(cast<SwitchStmt>(S)); 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::WhileStmtClass: 4274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitWhileStmt(cast<WhileStmt>(S)); 4284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 4294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 431852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitStmt(Stmt *S, AddStmtChoice asc) { 432852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 434852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, S, asc); 4356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitChildren(S); 4384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitChildren - Visit the children of a Stmt. 4414f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitChildren(Stmt* Terminator) { 4424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = Block; 4434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (Stmt::child_iterator I = Terminator->child_begin(), 4444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek E = Terminator->child_end(); I != E; ++I) { 4454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (*I) B = Visit(*I); 4466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return B; 4484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 450852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitAddrLabelExpr(AddrLabelExpr *A, 451852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek AddressTakenLabels.insert(A->getLabel()); 4536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 454852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 456852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, A, asc); 4576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 462852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBinaryOperator(BinaryOperator *B, 463852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (B->isLogicalOp()) { // && or || 4654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 466852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, B, asc); 4671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 468d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 4694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 4701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the LHS 4724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* LHSBlock = createBlock(false); 4734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LHSBlock->setTerminator(B); 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the RHS 4764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = ConfluenceBlock; 4774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = NULL; 4784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* RHSBlock = addStmt(B->getRHS()); 479862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek 480862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek if (RHSBlock) { 481d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 482862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek return 0; 483862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek } 484862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek else { 485862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek // Create an empty block for cases where the RHS doesn't require 486862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek // any explicit statements in the CFG. 487862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek RHSBlock = createBlock(); 488862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek } 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49000998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 491941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal = TryEvaluateBool(B->getLHS()); 4922de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (KnownVal.isKnown() && (B->getOpcode() == BO_LOr)) 493941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek KnownVal.negate(); 49400998a068e50945118f334c98af05ed44d7c22a6Mike Stump 4954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now link the LHSBlock with RHSBlock. 4962de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (B->getOpcode() == BO_LOr) { 497ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 498ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 4991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else { 5002de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(B->getOpcode() == BO_LAnd); 501ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 502ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 50319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Generate the blocks for evaluating the LHS. 5064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = LHSBlock; 5074f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5092de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall else if (B->getOpcode() == BO_Comma) { // , 5106dc534ecc19a045ebcfe93eefa45da509968e888Ted Kremenek autoCreateBlock(); 511852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, B, asc); 5124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(B->getRHS()); 5134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 515fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu else if (B->isAssignmentOp()) { 516fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (asc.alwaysAdd()) { 517fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu autoCreateBlock(); 518fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu AppendStmt(Block, B, asc); 519fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 520ad5a894df1841698c824381b414630799adc26caTed Kremenek 52144f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek // If visiting RHS causes us to finish 'Block' and the LHS doesn't 52244f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek // create a new block, then we should return RBlock. Otherwise 52344f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek // we'll incorrectly return NULL. 52444f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek CFGBlock *RBlock = Visit(B->getRHS()); 52544f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek CFGBlock *LBlock = Visit(B->getLHS(), AddStmtChoice::AsLValueNotAlwaysAdd); 52644f8ef13a3af125eecd408d0fad79a4a1eda5366Ted Kremenek return LBlock ? LBlock : RBlock; 527fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 529852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(B, asc); 5304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 532852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBlockExpr(BlockExpr *E, AddStmtChoice asc) { 533852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 534721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek autoCreateBlock(); 535852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, E, asc); 536721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek } 537721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek return Block; 5384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 539cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 5404f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitBreakStmt(BreakStmt *B) { 5414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // "break" is a control-flow statement. Thus we stop processing the current 5424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // block. 543d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 544d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu return 0; 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now create a new block that ends with the break statement. 5474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = createBlock(false); 5484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block->setTerminator(B); 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If there is no target for the break, then we are looking at an incomplete 5514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // AST. This means that the CFG cannot be constructed. 5524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (BreakTargetBlock) 553ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, BreakTargetBlock); 5544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek else 5554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek badCFG = true; 5561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 5594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5614c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stumpstatic bool CanThrow(Expr *E) { 5624c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump QualType Ty = E->getType(); 5634c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Ty->isFunctionPointerType()) 5644c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<PointerType>()->getPointeeType(); 5654c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump else if (Ty->isBlockPointerType()) 5664c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<BlockPointerType>()->getPointeeType(); 567ad5a894df1841698c824381b414630799adc26caTed Kremenek 5684c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump const FunctionType *FT = Ty->getAs<FunctionType>(); 5694c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (FT) { 5704c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT)) 5714c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Proto->hasEmptyExceptionSpec()) 5724c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return false; 5734c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump } 5744c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return true; 5754c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump} 5764c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 577852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitCallExpr(CallExpr *C, AddStmtChoice asc) { 5784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If this is a call to a no-return function, this stops the block here. 5792455636163fdd18581d7fdae816433f886d88213Mike Stump bool NoReturn = false; 580264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola if (getFunctionExtInfo(*C->getCallee()->getType()).getNoReturn()) { 5812455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 5822455636163fdd18581d7fdae816433f886d88213Mike Stump } 5832455636163fdd18581d7fdae816433f886d88213Mike Stump 5844c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdge = false; 585079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 586079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Languages without exceptions are assumed to not throw. 587079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Context->getLangOptions().Exceptions) { 5886c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek if (BuildOpts.AddEHEdges) 5894c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = true; 590079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 591079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 592079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FunctionDecl *FD = C->getDirectCallee()) { 5932455636163fdd18581d7fdae816433f886d88213Mike Stump if (FD->hasAttr<NoReturnAttr>()) 5942455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 595079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FD->hasAttr<NoThrowAttr>()) 5964c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 597079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 5982455636163fdd18581d7fdae816433f886d88213Mike Stump 5994c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (!CanThrow(C->getCallee())) 6004c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 6014c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 602fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (!NoReturn && !AddEHEdge) { 603fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (asc.asLValue()) 604fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAddAsLValue); 605fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu else 606fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAdd); 607fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 6081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 609079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Block) { 610079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Succ = Block; 611d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 612079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return 0; 613079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 615079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block = createBlock(!NoReturn); 616852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, C, asc); 6172455636163fdd18581d7fdae816433f886d88213Mike Stump 618079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (NoReturn) { 619079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Wire this to the exit block directly. 620079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 621079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6224c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdge) { 623079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Add exceptional edges. 624079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (TryTerminatedBlock) 625079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, TryTerminatedBlock); 626079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else 627079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 628079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6302455636163fdd18581d7fdae816433f886d88213Mike Stump return VisitChildren(C); 631d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 632d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 633852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitChooseExpr(ChooseExpr *C, 634852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 6353fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 636852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 637d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 6383fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 640115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 641115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 642115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 6433fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6443fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 645df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* LHSBlock = Visit(C->getLHS(), asc); 646d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 6473fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6493fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6503fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 651df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* RHSBlock = Visit(C->getRHS(), asc); 652d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 6533fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6553fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = createBlock(false); 65600998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 657941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 658ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 659ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 6603fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block->setTerminator(C); 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return addStmt(C->getCond()); 6623fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek} 6631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpCFGBlock* CFGBuilder::VisitCompoundStmt(CompoundStmt* C) { 6661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CFGBlock* LastBlock = Block; 6674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 6684f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (CompoundStmt::reverse_body_iterator I=C->body_rbegin(), E=C->body_rend(); 6694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek I != E; ++I ) { 670334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek // If we hit a segment of code just containing ';' (NullStmts), we can 671334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek // get a null block back. In such cases, just use the LastBlock 672334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek if (CFGBlock *newBlock = addStmt(*I)) 673334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek LastBlock = newBlock; 6741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 675e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek if (badCFG) 676e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek return NULL; 6771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 678079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 6794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return LastBlock; 6804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 682852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitConditionalOperator(ConditionalOperator *C, 683852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 684f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the confluence block that will "merge" the results of the ternary 685f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // expression. 686f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 687852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 688d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 689f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 691115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 692115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 693115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 694f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create a block for the LHS expression if there is an LHS expression. A 695f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // GCC extension allows LHS to be NULL, causing the condition to be the 696f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // value that is returned instead. 697f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // e.g: x ?: y is shorthand for: x ? x : y; 698f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 699f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 700f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* LHSBlock = NULL; 701f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (C->getLHS()) { 702df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu LHSBlock = Visit(C->getLHS(), asc); 703d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 704f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 705f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 706f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 708f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block for the RHS expression. 709f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 710df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* RHSBlock = Visit(C->getRHS(), asc); 711d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 712f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 714f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block that will contain the condition. 715f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = createBlock(false); 7161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 718941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 719e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (LHSBlock) { 720ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 721e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 722941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek if (KnownVal.isFalse()) { 723e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we know the condition is false, add NULL as the successor for 724e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the block containing the condition. In this case, the confluence 725e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // block will have just one predecessor. 726ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, 0); 727941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 1); 728e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 729e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we have no LHS expression, add the ConfluenceBlock as a direct 730e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // successor for the block containing the condition. Moreover, we need to 731e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // reverse the order of the predecessors in the ConfluenceBlock because 732e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the RHSBlock will have been added to the succcessors already, and we 733e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // want the first predecessor to the the block containing the expression 734e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // for the case when the ternary expression evaluates to true. 735ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ConfluenceBlock); 736941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 2); 737e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump std::reverse(ConfluenceBlock->pred_begin(), 738e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump ConfluenceBlock->pred_end()); 739e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } 740f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 742ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 743f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block->setTerminator(C); 744f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return addStmt(C->getCond()); 745f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek} 746f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek 7474f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclStmt(DeclStmt *DS) { 7484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 7496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 7504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (DS->isSingleDecl()) { 751ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DS); 7524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclSubExpr(DS->getSingleDecl()); 753d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek } 7541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = 0; 7561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: Add a reverse iterator for DeclStmt to avoid this extra copy. 7584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek typedef llvm::SmallVector<Decl*,10> BufTy; 7594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BufTy Buf(DS->decl_begin(), DS->decl_end()); 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (BufTy::reverse_iterator I = Buf.rbegin(), E = Buf.rend(); I != E; ++I) { 7624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Get the alignment of the new DeclStmt, padding out to >=8 bytes. 7634f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek unsigned A = llvm::AlignOf<DeclStmt>::Alignment < 8 7644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ? 8 : llvm::AlignOf<DeclStmt>::Alignment; 7651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Allocate the DeclStmt using the BumpPtrAllocator. It will get 7674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // automatically freed with the CFG. 7684f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclGroupRef DG(*I); 7694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Decl *D = *I; 7701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump void *Mem = cfg->getAllocator().Allocate(sizeof(DeclStmt), A); 7714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclStmt *DSNew = new (Mem) DeclStmt(DG, D->getLocation(), GetEndLoc(D)); 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Append the fake DeclStmt to block. 774ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DSNew); 7754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek B = VisitDeclSubExpr(D); 7764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 7771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return B; 7794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 7801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitDeclSubExpr - Utility method to add block-level expressions for 7824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// initializers in Decls. 7834f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclSubExpr(Decl* D) { 7844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(Block); 785d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek 7864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VarDecl *VD = dyn_cast<VarDecl>(D); 7871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!VD) 7894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 7901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Expr *Init = VD->getInit(); 7921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7934f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Init) { 7945ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AddStmtChoice::Kind k = 7955ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek VD->getType()->isReferenceType() ? AddStmtChoice::AsLValueNotAlwaysAdd 7965ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek : AddStmtChoice::NotAlwaysAdd; 7975ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek Visit(Init, AddStmtChoice(k)); 7984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 7991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If the type of VD is a VLA, then we must process its size expressions. 8014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(VD->getType().getTypePtr()); VA != 0; 8024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA = FindVA(VA->getElementType().getTypePtr())) 8034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = addStmt(VA->getSizeExpr()); 8041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 806d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 807fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 808d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitIfStmt(IfStmt* I) { 8096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We may see an if statement in the middle of a basic block, or it may be the 8106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // first statement we are processing. In either case, we create a new basic 8116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. First, we create the blocks for the then...else statements, and 8126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // then we create the block containing the if statement. If we were in the 8136c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // middle of a block, we stop processing that block. That block is then the 8146c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // implicit successor for the "then" and "else" clauses. 8156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The block we were proccessing is now finished. Make it the successor 8176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 8186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 819d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = Block; 820d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 8214e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 822c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 824b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the false branch. 825d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ElseBlock = Succ; 8266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 827d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* Else = I->getElse()) { 828d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 830d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block so that the recursive call to Visit will 8316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // create a new basic block. 832d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 8334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ElseBlock = addStmt(Else); 8346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 835b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek if (!ElseBlock) // Can occur when the Else body has all NullStmts. 836b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek ElseBlock = sv.get(); 8374e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 838d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 8394e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8404e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 841c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 843b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the true branch. 844d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ThenBlock; 845d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 846d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Stmt* Then = I->getThen(); 8476db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Then); 848d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Block = NULL; 8504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ThenBlock = addStmt(Then); 8516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 852dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek if (!ThenBlock) { 853dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // We can reach here if the "then" body has all NullStmts. 854dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // Create an empty block so we can distinguish between true and false 855dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // branches in path-sensitive analyses. 856dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek ThenBlock = createBlock(false); 857ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ThenBlock, sv.get()); 8586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (Block) { 859d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 8604e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 8620cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek } 863d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 8646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now create a new block containing the if statement. 865d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 8666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 867d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Set the terminator of the new block to the If statement. 868d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(I); 8696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 87000998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 871941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(I->getCond()); 87200998a068e50945118f334c98af05ed44d7c22a6Mike Stump 873d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now add the successors. 874ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : ThenBlock); 875ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue()? NULL : ElseBlock); 8766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the condition as the last statement in the new block. This may create 8786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // new blocks as the condition may contain control-flow. Any newly created 8796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // blocks will be pointed to be "Block". 88061dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek Block = addStmt(I->getCond()); 881ad5a894df1841698c824381b414630799adc26caTed Kremenek 88261dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // Finally, if the IfStmt contains a condition variable, add both the IfStmt 88361dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // and the condition variable initialization to the CFG. 88461dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (VarDecl *VD = I->getConditionVariable()) { 88561dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (Expr *Init = VD->getInit()) { 88661dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek autoCreateBlock(); 88761dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek AppendStmt(Block, I, AddStmtChoice::AlwaysAdd); 88861dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek addStmt(Init); 88961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 89061dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 891ad5a894df1841698c824381b414630799adc26caTed Kremenek 89261dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek return Block; 893d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 8946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 896d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitReturnStmt(ReturnStmt* R) { 8976c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 898d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // 8996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NOTE: If a "return" appears in the middle of a block, this means that the 9006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // code afterwards is DEAD (unreachable). We still keep a basic block 9016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for that code; a simple "mark-and-sweep" from the entry block will be 9026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // able to report such dead blocks. 903d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 904d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the new block. 905d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 9066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 907d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // The Exit block is the only successor. 908ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 9096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the return statement to the block. This may create new blocks if R 9116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // contains control-flow (short-circuit operations). 912852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(R, AddStmtChoice::AlwaysAdd); 913d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 9140cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek 915d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitLabelStmt(LabelStmt* L) { 916d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Get the block of the labeled statement. Add it to our map. 9174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(L->getSubStmt()); 9182677ea871a25aa79f9db360f6ed10584c02267adTed Kremenek CFGBlock* LabelBlock = Block; 9196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!LabelBlock) // This can happen when the body is empty, i.e. 9214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LabelBlock = createBlock(); // scopes that only contains NullStmts. 9226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(LabelMap.find(L) == LabelMap.end() && "label already in map"); 924d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMap[ L ] = LabelBlock; 9256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Labels partition blocks, so this is the end of the basic block we were 9276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing (L is the block's label). Because this is label (and we have 9286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // already processed the substatement) there is no extra control-flow to worry 9296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // about. 9309cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek LabelBlock->setLabel(L); 931d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 9324e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 9336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary); 935d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 9366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 937d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // This block is now the implicit successor of other blocks. 938d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = LabelBlock; 9396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 940d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return LabelBlock; 941d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 94231dcd3c8c4df5a656f58f50ea73afc177c101c67Ted Kremenek 943d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitGotoStmt(GotoStmt* G) { 9446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Goto is a control-flow statement. Thus we stop processing the current 9456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block and create a new one. 9464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 947d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 948d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(G); 9496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we already know the mapping to the label block add the successor now. 951d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMapTy::iterator I = LabelMap.find(G->getLabel()); 9526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 953d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (I == LabelMap.end()) 954d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We will need to backpatch this block later. 955d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BackpatchBlocks.push_back(Block); 956d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek else 957ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, I->second); 958d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 9596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 960d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 961d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 962d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) { 963d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 9646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 965fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "for" is a control-flow statement. Thus we stop processing the current 966fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 967d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 968d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 9694e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 970d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 9714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 9724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 9736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9743f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // Save the current value for the break targets. 9753f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // All breaks should go to the code following the loop. 9763f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek SaveAndRestore<CFGBlock*> save_break(BreakTargetBlock); 9773f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek BreakTargetBlock = LoopSuccessor; 9783f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek 9796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 9806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 9816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 98249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 98349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 9846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 98549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 9866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(F); 9876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 9896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 99049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = F->getCond()) { 99149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 99249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 9938f3b834471b158d65d490e3458fa16ba659ec105Ted Kremenek assert(Block == EntryConditionBlock || 9948f3b834471b158d65d490e3458fa16ba659ec105Ted Kremenek (Block == 0 && EntryConditionBlock == Succ)); 99558b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek 99658b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // If this block contains a condition variable, add both the condition 99758b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // variable and initializer to the CFG. 99858b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (VarDecl *VD = F->getConditionVariable()) { 99958b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (Expr *Init = VD->getInit()) { 100058b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek autoCreateBlock(); 100158b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek AppendStmt(Block, F, AddStmtChoice::AlwaysAdd); 100258b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek EntryConditionBlock = addStmt(Init); 100358b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 100458b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 100558b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 1006ad5a894df1841698c824381b414630799adc26caTed Kremenek 10074e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1008d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 10094e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10104e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 101149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 1012d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 10136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 10146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 101549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 10166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 101700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1018941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal(true); 10191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 102000998a068e50945118f334c98af05ed44d7c22a6Mike Stump if (F->getCond()) 102100998a068e50945118f334c98af05ed44d7c22a6Mike Stump KnownVal = TryEvaluateBool(F->getCond()); 102200998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1023d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create the loop body. 1024d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 10256db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(F->getBody()); 10266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10273f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // Save the current values for Block, Succ, and continue targets. 10283f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 10293f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek save_continue(ContinueTargetBlock); 10306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1031af603f742491dc4707138c0293d295171fdd51baTed Kremenek // Create a new block to contain the (bottom) of the loop body. 1032af603f742491dc4707138c0293d295171fdd51baTed Kremenek Block = NULL; 10336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1034e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek if (Stmt* I = F->getInc()) { 10356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Generate increment code in its own basic block. This is the target of 10366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // continue statements. 10374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = addStmt(I); 10386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // No increment code. Create a special, empty, block that is used as the 10406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // target block for "looping back" to the start of the loop. 10413575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Succ == EntryConditionBlock); 10423575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Succ = createBlock(); 1043e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek } 10446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10453575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // Finish up the increment (or empty) block if it hasn't been already. 10463575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek if (Block) { 10473575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Block == Succ); 1048d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 10494e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10503575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Block = 0; 10513575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek } 10526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10533575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock = Succ; 10546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10553575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // The starting block for the loop increment is the block that should 10563575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // represent the 'loop target' for looping back to the start of the loop. 10573575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock->setLoopTarget(F); 10583575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek 10596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now populate the body block, and in the process create new blocks as we 10606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // walk the body of the loop. 10614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(F->getBody()); 1062af603f742491dc4707138c0293d295171fdd51baTed Kremenek 1063af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 10641d4b218fa55239f2a7350f48be14090d2753c22cZhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "for (...;...;...) ;" 1065d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu else if (badCFG) 1066941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return 0; 10676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1068941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // This new body block is a successor to our "exit" condition block. 1069ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1070d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 10716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1072941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1073941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1074ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 10756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1076d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If the loop contains initialization, create a new block for those 10776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statements. This block can also contain statements that precede the loop. 1078d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* I = F->getInit()) { 1079d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(); 108049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return addStmt(I); 10816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There is no loop initialization. We are thus basically a while loop. 10836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NULL out Block to force lazy block construction. 10842bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek Block = NULL; 10855482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 108649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 10872bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek } 1088d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1089d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1090115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted KremenekCFGBlock *CFGBuilder::VisitMemberExpr(MemberExpr *M, AddStmtChoice asc) { 1091115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek if (asc.alwaysAdd()) { 1092115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek autoCreateBlock(); 1093115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek AppendStmt(Block, M, asc); 1094115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek } 1095115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return Visit(M->getBase(), 1096115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek M->isArrow() ? AddStmtChoice::NotAlwaysAdd 1097115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AsLValueNotAlwaysAdd); 1098115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek} 1099115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 1100514de5a21645900c92cf4f4f7313d6f66945d134Ted KremenekCFGBlock* CFGBuilder::VisitObjCForCollectionStmt(ObjCForCollectionStmt* S) { 1101514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Objective-C fast enumeration 'for' statements: 1102514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC 1103514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1104514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( Type newVariable in collection_expression ) { statements } 1105514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1106514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1107514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1108514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // prologue: 1109514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. collection_expression 1110514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1111514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // loop_entry: 11124cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // 1. side-effects of element expression 1113514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. ObjCForCollectionStmt [performs binding to newVariable] 1114514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. ObjCForCollectionStmt TB, FB [jumps to TB if newVariable != nil] 1115514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // TB: 1116514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // statements 1117514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1118514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // FB: 1119514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // what comes after 1120514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1121514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // and 1122514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1123514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Type existingItem; 1124514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( existingItem in expression ) { statements } 1125514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1126514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1127514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same with newVariable replaced with existingItem; the binding works 11296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same except that for one ObjCForCollectionStmt::getElement() returns 11306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // a DeclStmt and the other returns a DeclRefExpr. 1131514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1133514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek CFGBlock* LoopSuccessor = 0; 11346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1135514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek if (Block) { 1136d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 11374e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1138514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek LoopSuccessor = Block; 1139514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek Block = 0; 11404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 11414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 11426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11434cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Build the condition blocks. 11444cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 11454cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 11466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11474cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Set the terminator for the "exit" condition block. 11486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(S); 11496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The last statement in the block should be the ObjCForCollectionStmt, which 11516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // performs the actual binding to 'element' and determines if there are any 11526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // more items in the collection. 1153ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(ExitConditionBlock, S); 11544cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = ExitConditionBlock; 11556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11564cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Walk the 'element' expression to see if there are any side-effects. We 11576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // generate new blocks as necesary. We DON'T add the statement by default to 11586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the CFG unless it contains control-flow. 1159852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek EntryConditionBlock = Visit(S->getElement(), AddStmtChoice::NotAlwaysAdd); 11606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 1161d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 11624e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 11634e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek Block = 0; 11644e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 11656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 11676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 11684cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Succ = EntryConditionBlock; 11696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11704cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Now create the true branch. 11716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump { 11724cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Save the current values for Succ, continue and break targets. 11734cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek SaveAndRestore<CFGBlock*> save_Succ(Succ), 11746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump save_continue(ContinueTargetBlock), save_break(BreakTargetBlock); 11756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11764cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BreakTargetBlock = LoopSuccessor; 11776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = EntryConditionBlock; 11786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(S->getBody()); 11806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11814cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek if (!BodyBlock) 11824cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BodyBlock = EntryConditionBlock; // can happen for "for (X in Y) ;" 11834e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 1184d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 11854e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 11864e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 11876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11884cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // This new body block is a successor to our "exit" condition block. 1189ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, BodyBlock); 11904cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek } 11916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11924cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Link up the condition block with the code that follows the loop. 11934cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // (the false branch). 1194ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, LoopSuccessor); 11954cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek 1196514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Now create a prologue block to contain the collection expression. 11974cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = createBlock(); 1198514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek return addStmt(S->getCollection()); 11996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 12006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1201b3b0b3624e462c2940f65b86e773bfc300005203Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt* S) { 1202b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // FIXME: Add locking 'primitives' to CFG for @synchronized. 12036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1204b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the body. 12054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *SyncBlock = addStmt(S->getSynchBody()); 12066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1207da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // The sync body starts its own basic block. This makes it a little easier 1208da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // for diagnostic clients. 1209da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek if (SyncBlock) { 1210d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 1211da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek return 0; 12126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1213da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek Block = 0; 1214fadebbafe622752c3c6565b53ce8cd42bbbbd90cTed Kremenek Succ = SyncBlock; 1215da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek } 12166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12174beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek // Add the @synchronized to the CFG. 12184beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek autoCreateBlock(); 12194beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek AppendStmt(Block, S, AddStmtChoice::AlwaysAdd); 12204beaa9f51b2da57c64740cef2bd1c2fdb0c325d5Ted Kremenek 1221b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the sync expression. 12224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(S->getSynchExpr()); 1223b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek} 12246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1225e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtTryStmt(ObjCAtTryStmt* S) { 12264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME 122790658ec72542df44eb462c69056184d2946bdbceTed Kremenek return NYS(); 1228e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted Kremenek} 1229514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek 1230d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitWhileStmt(WhileStmt* W) { 1231d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 12326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1233fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "while" is a control-flow statement. Thus we stop processing the current 1234fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 1235d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 1236d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 12374e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1238d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 12394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 12404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 12416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 12436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 12446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 124549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 124649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 12476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 124849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 124949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ExitConditionBlock->setTerminator(W); 12506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 12526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. Thus we update 12536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "Succ" after adding the condition. 125449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = W->getCond()) { 125549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 125649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 1257f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Block == EntryConditionBlock); 1258ad5a894df1841698c824381b414630799adc26caTed Kremenek 12594ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // If this block contains a condition variable, add both the condition 12604ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // variable and initializer to the CFG. 12614ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (VarDecl *VD = W->getConditionVariable()) { 12624ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (Expr *Init = VD->getInit()) { 12634ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek autoCreateBlock(); 12644ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek AppendStmt(Block, W, AddStmtChoice::AlwaysAdd); 12654ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek EntryConditionBlock = addStmt(Init); 12664ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek assert(Block == EntryConditionBlock); 12674ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 12684ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 12694ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek 12704e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1271d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 12724e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 12734e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 127449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 12756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 12776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 127849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 12796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 128000998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1281941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(W->getCond()); 128200998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1283d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 1284d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 1285f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(W->getBody()); 1286d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1287d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1288d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 1289d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_continue(ContinueTargetBlock), 1290d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_break(BreakTargetBlock); 1291f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek 12926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block to represent the transition block for looping back 12936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to the head of the loop. 1294f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Block = 0; 1295f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Succ == EntryConditionBlock); 1296f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ = createBlock(); 1297f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ->setLoopTarget(W); 12986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = Succ; 12996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1300d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1301d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 13026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1303d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1304f752fcfae84fbf21b78383bf2461633382d51844Ted Kremenek Block = NULL; 13056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1306d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 13074f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(W->getBody()); 13086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1309af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1310d5c3b1339e842619fc3ae79482424f901aeb89f3Zhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "while(...) ;" 13114e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 1312d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13134e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 13144e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 13156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1316941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Add the loop body entry as a successor to the condition. 1317ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1318bf15b278a439d73b605ec00a8d3977ef305712f4Ted Kremenek } 13196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1320941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1321941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1322ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 13236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the condition block since we loop back 13256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to this block. NULL out Block to force lazy creation of another block. 1326d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 13276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13284ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // Return the condition block, which is the dominating block for the loop. 13295482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 133049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 1331d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 13321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13344f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitObjCAtCatchStmt(ObjCAtCatchStmt* S) { 13354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: For now we pretend that @catch and the code it contains does not 13364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // exit. 13374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 13384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 13396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13402fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtThrowStmt(ObjCAtThrowStmt* S) { 13412fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // FIXME: This isn't complete. We basically treat @throw like a return 13422fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // statement. 13436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13446c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 1345d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 13476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13482fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // Create the new block. 13492fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek Block = createBlock(false); 13506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13512fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // The Exit block is the only successor. 1352ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 13536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the statement to the block. This may create new blocks if S contains 13556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow (short-circuit operations). 1356852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, AddStmtChoice::AlwaysAdd); 13572fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek} 1358989d52d469df0c202f7de82f54407066c7db2e63Ted Kremenek 13590979d80615df97c675423de631c1b884819f4712Mike StumpCFGBlock* CFGBuilder::VisitCXXThrowExpr(CXXThrowExpr* T) { 13606c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 1361d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13620979d80615df97c675423de631c1b884819f4712Mike Stump return 0; 13630979d80615df97c675423de631c1b884819f4712Mike Stump 13640979d80615df97c675423de631c1b884819f4712Mike Stump // Create the new block. 13650979d80615df97c675423de631c1b884819f4712Mike Stump Block = createBlock(false); 13660979d80615df97c675423de631c1b884819f4712Mike Stump 13675d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (TryTerminatedBlock) 13685d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The current try statement is the only successor. 13695d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, TryTerminatedBlock); 1370ad5a894df1841698c824381b414630799adc26caTed Kremenek else 13715d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // otherwise the Exit block is the only successor. 13725d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, &cfg->getExit()); 13730979d80615df97c675423de631c1b884819f4712Mike Stump 13740979d80615df97c675423de631c1b884819f4712Mike Stump // Add the statement to the block. This may create new blocks if S contains 13750979d80615df97c675423de631c1b884819f4712Mike Stump // control-flow (short-circuit operations). 1376852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(T, AddStmtChoice::AlwaysAdd); 13770979d80615df97c675423de631c1b884819f4712Mike Stump} 13780979d80615df97c675423de631c1b884819f4712Mike Stump 13794f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDoStmt(DoStmt* D) { 1380d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 13816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13828f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // "do...while" is a control-flow statement. Thus we stop processing the 13838f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // current block. 1384d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 1385d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 13864e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1387d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 13884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 13894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 13906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 13926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 13936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 139449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 139549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 13966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 139749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 13986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(D); 13996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 14016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 140249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = D->getCond()) { 140349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 140449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 14054e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1406d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 14074e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14084e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 140949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 14106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14115482713d70ecbfe608940018046aa248b3d03443Ted Kremenek // The condition block is the implicit successor for the loop body. 141249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 141349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 141400998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1415941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(D->getCond()); 141600998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1417d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 141849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* BodyBlock = NULL; 1419d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 14206db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(D->getBody()); 14216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1422d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1423d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 14245d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_continue(ContinueTargetBlock), 14255d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_break(BreakTargetBlock); 14266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1427d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All continues within this loop should go to the condition block 142849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ContinueTargetBlock = EntryConditionBlock; 14296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1430d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1431d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 14326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1433d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1434b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek Block = NULL; 14356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1436d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 14374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BodyBlock = addStmt(D->getBody()); 14386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1439af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1440a9d996dbeb719200c4a9d86f68166a237583025fTed Kremenek BodyBlock = EntryConditionBlock; // can happen for "do ; while(...)" 14414e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 1442d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 14434e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14444e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 14456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1446d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek if (!KnownVal.isFalse()) { 1447d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // Add an intermediate block between the BodyBlock and the 1448d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // ExitConditionBlock to represent the "loop back" transition. Create an 1449d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // empty block to represent the transition block for looping back to the 1450d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // head of the loop. 1451d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // FIXME: Can we do this more efficiently without adding another block? 1452d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek Block = NULL; 1453d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek Succ = BodyBlock; 1454d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek CFGBlock *LoopBackBlock = createBlock(); 1455d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek LoopBackBlock->setLoopTarget(D); 1456d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek 1457d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // Add the loop body entry as a successor to the condition. 1458d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek AddSuccessor(ExitConditionBlock, LoopBackBlock); 1459d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek } 1460d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek else 1461d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek AddSuccessor(ExitConditionBlock, NULL); 1462b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek } 14636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1464941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. 1465941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // (the false branch). 1466ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 14676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the body block(s) since we loop back to 14696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the body. NULL out Block to force lazy creation of another block. 1470d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 14716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1472d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Return the loop body, which is the dominating block for the loop. 14735482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = BodyBlock; 1474d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return BodyBlock; 1475d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1476d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1477d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitContinueStmt(ContinueStmt* C) { 1478d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // "continue" is a control-flow statement. Thus we stop processing the 1479d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // current block. 1480d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 1481d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu return 0; 14826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1483d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create a new block that ends with the continue statement. 1484d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 1485d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(C); 14866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1487d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If there is no target for the continue, then we are looking at an 1488235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek // incomplete AST. This means the CFG cannot be constructed. 1489235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek if (ContinueTargetBlock) 1490ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ContinueTargetBlock); 1491235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek else 1492235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek badCFG = true; 14936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1494d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return Block; 1495d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 14961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149713fc08a323b29dd97a46def1e3a15bf082476efaTed KremenekCFGBlock *CFGBuilder::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, 1498852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 149913fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek 1500852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 150113fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1502ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, E); 150313fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // VLA types have expressions that must be evaluated. 15064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (E->isArgumentType()) { 15074f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(E->getArgumentType().getTypePtr()); 15084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA != 0; VA = FindVA(VA->getElementType().getTypePtr())) 15094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(VA->getSizeExpr()); 15104e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 15111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 1513d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 15141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitStmtExpr - Utility method to handle (nested) statement 15164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// expressions (a GCC extension). 1517852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::VisitStmtExpr(StmtExpr *SE, AddStmtChoice asc) { 1518852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 151913fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1520ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, SE); 152113fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(SE->getSubStmt()); 15234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 1524d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1525411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitSwitchStmt(SwitchStmt* Terminator) { 15266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "switch" is a control-flow statement. Thus we stop processing the current 15276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 1528d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* SwitchSuccessor = NULL; 15296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1530d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 1531d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 15324e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1533d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchSuccessor = Block; 15346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else SwitchSuccessor = Succ; 1535d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1536d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current "switch" context. 1537d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_switch(SwitchTerminatedBlock), 1538eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_break(BreakTargetBlock), 1539eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_default(DefaultCaseBlock); 1540eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 15416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Set the "default" case to be the block after the switch statement. If the 15426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // switch statement contains a "default:", this value will be overwritten with 15436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the block for that code. 1544eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = SwitchSuccessor; 15456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1546d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create a new block that will contain the switch statement. 1547d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchTerminatedBlock = createBlock(false); 15486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1549d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now process the switch body. The code after the switch is the implicit 1550d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // successor. 1551d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = SwitchSuccessor; 1552d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = SwitchSuccessor; 15536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // When visiting the body, the case statements should automatically get linked 15556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // up to the switch. We also don't keep a pointer to the body, since all 15566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow from the switch goes to case/default statements. 15576db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getBody() && "switch must contain a non-NULL body"); 155849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; 1559d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu addStmt(Terminator->getBody()); 15604e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 1561d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 15624e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 15634e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 156449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 15656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we have no "default:" case, the default transition is to the code 15666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // following the switch body. 1567ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, DefaultCaseBlock); 15686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 156949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Add the terminator and condition in the switch block. 1570411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek SwitchTerminatedBlock->setTerminator(Terminator); 15716db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getCond() && "switch condition must be non-NULL"); 1572d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = SwitchTerminatedBlock; 15736b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek Block = addStmt(Terminator->getCond()); 1574ad5a894df1841698c824381b414630799adc26caTed Kremenek 15756b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // Finally, if the SwitchStmt contains a condition variable, add both the 15766b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // SwitchStmt and the condition variable initialization to the CFG. 15776b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (VarDecl *VD = Terminator->getConditionVariable()) { 15786b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (Expr *Init = VD->getInit()) { 15796b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek autoCreateBlock(); 15806b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek AppendStmt(Block, Terminator, AddStmtChoice::AlwaysAdd); 15816b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek addStmt(Init); 15826b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 15836b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 1584ad5a894df1841698c824381b414630799adc26caTed Kremenek 15856b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek return Block; 1586d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1587d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 15884f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock* CFGBuilder::VisitCaseStmt(CaseStmt* CS) { 15896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // CaseStmts are essentially labels, so they are the first statement in a 15906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 15910fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CFGBlock *TopBlock = 0, *LastBlock = 0; 15920fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 15930fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (Stmt *Sub = CS->getSubStmt()) { 15940fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // For deeply nested chains of CaseStmts, instead of doing a recursion 15950fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // (which can blow out the stack), manually unroll and create blocks 15960fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // along the way. 15970fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek while (isa<CaseStmt>(Sub)) { 15980fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CFGBlock *CurrentBlock = createBlock(false); 15990fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CurrentBlock->setLabel(CS); 16000fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16010fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (TopBlock) 16020fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(LastBlock, CurrentBlock); 16030fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek else 16040fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek TopBlock = CurrentBlock; 16050fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16060fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(SwitchTerminatedBlock, CurrentBlock); 16070fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek LastBlock = CurrentBlock; 16080fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16090fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CS = cast<CaseStmt>(Sub); 16100fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Sub = CS->getSubStmt(); 16110fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 161229ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek 16130fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek addStmt(Sub); 16140fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 161629ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek CFGBlock* CaseBlock = Block; 16174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!CaseBlock) 16184f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock = createBlock(); 16196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Cases statements partition blocks, so this is the top of the basic block we 16216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // were processing (the "case XXX:" is the label). 16224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock->setLabel(CS); 16234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 1624d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 16254e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 16266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add this block to the list of successors for the block with the switch 16286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statement. 16294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(SwitchTerminatedBlock); 1630ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, CaseBlock); 16316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1632d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1633d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 16346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16350fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (TopBlock) { 16360fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(LastBlock, CaseBlock); 16370fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Succ = TopBlock; 16380fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16390fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek else { 16400fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // This block is now the implicit successor of other blocks. 16410fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Succ = CaseBlock; 16420fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16440fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek return Succ; 1645d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 16466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1647411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitDefaultStmt(DefaultStmt* Terminator) { 16484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Terminator->getSubStmt()) 16494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(Terminator->getSubStmt()); 16501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1651eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = Block; 16524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 16534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!DefaultCaseBlock) 16544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DefaultCaseBlock = createBlock(); 16556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Default statements partition blocks, so this is the top of the basic block 16576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // we were processing (the "default:" is the label). 1658411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek DefaultCaseBlock->setLabel(Terminator); 16591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1660d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 16614e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1662eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 16636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Unlike case statements, we don't add the default block to the successors 16646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for the switch statement immediately. This is done when we finish 16656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing the switch statement. This allows for the default case 16666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // (including a fall-through to the code after the switch statement) to always 16676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // be the last successor of a switch-terminated block. 16686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1669eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1670eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Block = NULL; 16716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1672eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // This block is now the implicit successor of other blocks. 1673eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Succ = DefaultCaseBlock; 16746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return DefaultCaseBlock; 1676295222c1f0926d84de77f076e79903523eeb5dbfTed Kremenek} 1677d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 16785d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock *CFGBuilder::VisitCXXTryStmt(CXXTryStmt *Terminator) { 16795d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // "try"/"catch" is a control-flow statement. Thus we stop processing the 16805d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // current block. 16815d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* TrySuccessor = NULL; 16825d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16835d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (Block) { 1684d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 16855d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 16865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump TrySuccessor = Block; 16875d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else TrySuccessor = Succ; 16885d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1689a1f93631a84621d77aeb627691da85a8991af188Mike Stump CFGBlock *PrevTryTerminatedBlock = TryTerminatedBlock; 16905d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16915d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Create a new block that will contain the try statement. 1692f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump CFGBlock *NewTryTerminatedBlock = createBlock(false); 16935d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add the terminator in the try block. 1694f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump NewTryTerminatedBlock->setTerminator(Terminator); 16955d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1696a1f93631a84621d77aeb627691da85a8991af188Mike Stump bool HasCatchAll = false; 16975d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump for (unsigned h = 0; h <Terminator->getNumHandlers(); ++h) { 16985d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 16995d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 17005d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CXXCatchStmt *CS = Terminator->getHandler(h); 1701a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl() == 0) { 1702a1f93631a84621d77aeb627691da85a8991af188Mike Stump HasCatchAll = true; 1703a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 17045d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17055d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock *CatchBlock = VisitCXXCatchStmt(CS); 17065d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CatchBlock == 0) 17075d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17085d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add this block to the list of successors for the block with the try 17095d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // statement. 1710f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, CatchBlock); 17115d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 1712a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (!HasCatchAll) { 1713a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (PrevTryTerminatedBlock) 1714f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, PrevTryTerminatedBlock); 1715a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 1716f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, &cfg->getExit()); 1717a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 17185d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17195d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 17205d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 17215d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1722f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump // Save the current "try" context. 1723f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump SaveAndRestore<CFGBlock*> save_try(TryTerminatedBlock); 1724f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump TryTerminatedBlock = NewTryTerminatedBlock; 1725f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump 17266db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getTryBlock() && "try must contain a non-NULL body"); 17275d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17283fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek Block = addStmt(Terminator->getTryBlock()); 17295d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return Block; 17305d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17315d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17325d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock* CFGBuilder::VisitCXXCatchStmt(CXXCatchStmt* CS) { 17335d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // CXXCatchStmt are treated like labels, so they are the first statement in a 17345d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // block. 17355d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17365d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CS->getHandlerBlock()) 17375d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump addStmt(CS->getHandlerBlock()); 17385d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17395d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* CatchBlock = Block; 17405d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!CatchBlock) 17415d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock = createBlock(); 17425d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17435d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock->setLabel(CS); 17445d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1745d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 17465d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17475d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17485d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary) 17495d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17505d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17515d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return CatchBlock; 17525d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17535d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1754ad5a894df1841698c824381b414630799adc26caTed KremenekCFGBlock *CFGBuilder::VisitCXXMemberCallExpr(CXXMemberCallExpr *C, 1755c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu AddStmtChoice asc) { 1756ad5a894df1841698c824381b414630799adc26caTed Kremenek AddStmtChoice::Kind K = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 175721f6d6ea71b89aeae6b9262c8cbdff7f6328e749Zhongxing Xu : AddStmtChoice::AlwaysAdd; 1758c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu autoCreateBlock(); 175921f6d6ea71b89aeae6b9262c8cbdff7f6328e749Zhongxing Xu AppendStmt(Block, C, AddStmtChoice(K)); 1760c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitChildren(C); 1761c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu} 1762c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 176319bb356317952445b03ee341c02f6147083c9eeaTed KremenekCFGBlock* CFGBuilder::VisitIndirectGotoStmt(IndirectGotoStmt* I) { 17646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Lazily create the indirect-goto dispatch block if there isn't one already. 176519bb356317952445b03ee341c02f6147083c9eeaTed Kremenek CFGBlock* IBlock = cfg->getIndirectGotoBlock(); 17666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 176719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek if (!IBlock) { 176819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek IBlock = createBlock(false); 176919bb356317952445b03ee341c02f6147083c9eeaTed Kremenek cfg->setIndirectGotoBlock(IBlock); 177019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 17716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 177219bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // IndirectGoto is a control-flow statement. Thus we stop processing the 177319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // current block and create a new one. 1774d438b3dbdcde4df4f61a99054104643e6aadf78bZhongxing Xu if (badCFG) 17754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 17764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 177719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block = createBlock(false); 177819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block->setTerminator(I); 1779ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, IBlock); 178019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek return addStmt(I->getTarget()); 178119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek} 178219bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 1783befef2f69759d7338e2b7c5ce6c8b6f47fe6e667Ted Kremenek} // end anonymous namespace 1784026473c2175424a039f51ca8949937268721b965Ted Kremenek 17856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// createBlock - Constructs and adds a new CFGBlock to the CFG. The block has 17866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// no successors or predecessors. If this is the first block created in the 17876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// CFG, it is automatically set to be the Entry and Exit of the CFG. 17889438252ad2ecae5338df565ca33c6969e4fbfa41Ted KremenekCFGBlock* CFG::createBlock() { 1789026473c2175424a039f51ca8949937268721b965Ted Kremenek bool first_block = begin() == end(); 1790026473c2175424a039f51ca8949937268721b965Ted Kremenek 1791026473c2175424a039f51ca8949937268721b965Ted Kremenek // Create the block. 1792ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek CFGBlock *Mem = getAllocator().Allocate<CFGBlock>(); 1793ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek new (Mem) CFGBlock(NumBlockIDs++, BlkBVC); 1794ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Blocks.push_back(Mem, BlkBVC); 1795026473c2175424a039f51ca8949937268721b965Ted Kremenek 1796026473c2175424a039f51ca8949937268721b965Ted Kremenek // If this is the first block, set it as the Entry and Exit. 1797ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (first_block) 1798ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Entry = Exit = &back(); 1799026473c2175424a039f51ca8949937268721b965Ted Kremenek 1800026473c2175424a039f51ca8949937268721b965Ted Kremenek // Return the block. 1801ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek return &back(); 1802026473c2175424a039f51ca8949937268721b965Ted Kremenek} 1803026473c2175424a039f51ca8949937268721b965Ted Kremenek 1804026473c2175424a039f51ca8949937268721b965Ted Kremenek/// buildCFG - Constructs a CFG from an AST. Ownership of the returned 1805026473c2175424a039f51ca8949937268721b965Ted Kremenek/// CFG is returned to the caller. 1806b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFG::buildCFG(const Decl *D, Stmt* Statement, ASTContext *C, 18076c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek BuildOptions BO) { 1808fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBuilder Builder; 18096c52c7850bccb6991470668429a1e1edf01b0873Ted Kremenek return Builder.buildCFG(D, Statement, C, BO); 1810fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek} 1811fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 181263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 181363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek// CFG: Queries for BlkExprs. 181463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 181563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 181663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremeneknamespace { 181786946745225096243f6969dc745267b78fc211a6Ted Kremenek typedef llvm::DenseMap<const Stmt*,unsigned> BlkExprMapTy; 181863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 181963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 18208a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenekstatic void FindSubExprAssignments(Stmt *S, 18218a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek llvm::SmallPtrSet<Expr*,50>& Set) { 18228a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!S) 182333d4aab80f31bd06257526fe2883ea920529456bTed Kremenek return; 18246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18258a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek for (Stmt::child_iterator I=S->child_begin(), E=S->child_end(); I!=E; ++I) { 1826ad5a894df1841698c824381b414630799adc26caTed Kremenek Stmt *child = *I; 18278a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!child) 18288a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek continue; 1829ad5a894df1841698c824381b414630799adc26caTed Kremenek 18308a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(child)) 183133d4aab80f31bd06257526fe2883ea920529456bTed Kremenek if (B->isAssignmentOp()) Set.insert(B); 18326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18338a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek FindSubExprAssignments(child, Set); 183433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 183533d4aab80f31bd06257526fe2883ea920529456bTed Kremenek} 183633d4aab80f31bd06257526fe2883ea920529456bTed Kremenek 183763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekstatic BlkExprMapTy* PopulateBlkExprMap(CFG& cfg) { 183863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = new BlkExprMapTy(); 18396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Look for assignments that are used as subexpressions. These are the only 18416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // assignments that we want to *possibly* register as a block-level 18426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression. Basically, if an assignment occurs both in a subexpression and 18436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // at the block-level, it is a block-level expression. 184433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek llvm::SmallPtrSet<Expr*,50> SubExprAssignments; 18456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 184663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) 1847ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 1848b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu if (CFGStmt S = BI->getAs<CFGStmt>()) 1849b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu FindSubExprAssignments(S, SubExprAssignments); 185086946745225096243f6969dc745267b78fc211a6Ted Kremenek 1851411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) { 18526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Iterate over the statements again on identify the Expr* and Stmt* at the 18546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block-level that are block-level expressions. 1855411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 1856b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) { 1857b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGStmt CS = BI->getAs<CFGStmt>(); 1858b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu if (!CS.isValid()) 1859b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu continue; 1860b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu if (Expr* Exp = dyn_cast<Expr>(CS.getStmt())) { 18616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1862411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(Exp)) { 186333d4aab80f31bd06257526fe2883ea920529456bTed Kremenek // Assignment expressions that are not nested within another 18646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression are really "statements" whose value is never used by 18656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // another expression. 1866411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (B->isAssignmentOp() && !SubExprAssignments.count(Exp)) 186733d4aab80f31bd06257526fe2883ea920529456bTed Kremenek continue; 18686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (const StmtExpr* Terminator = dyn_cast<StmtExpr>(Exp)) { 18696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Special handling for statement expressions. The last statement in 18706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the statement expression is also a block-level expr. 1871411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek const CompoundStmt* C = Terminator->getSubStmt(); 187286946745225096243f6969dc745267b78fc211a6Ted Kremenek if (!C->body_empty()) { 187333d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 187486946745225096243f6969dc745267b78fc211a6Ted Kremenek (*M)[C->body_back()] = x; 187586946745225096243f6969dc745267b78fc211a6Ted Kremenek } 187686946745225096243f6969dc745267b78fc211a6Ted Kremenek } 1877e2dcd783a04f654c50bd8b13fb08a440afbd67e7Ted Kremenek 187833d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 1879411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek (*M)[Exp] = x; 188033d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 1881b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 18826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1883411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek // Look at terminators. The condition is a block-level expression. 18846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1885ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Stmt* S = (*I)->getTerminatorCondition(); 18866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1887390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek if (S && M->find(S) == M->end()) { 1888411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek unsigned x = M->size(); 1889390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek (*M)[S] = x; 1890411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 1891411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 18926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 189386946745225096243f6969dc745267b78fc211a6Ted Kremenek return M; 189463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 189563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 189686946745225096243f6969dc745267b78fc211a6Ted KremenekCFG::BlkExprNumTy CFG::getBlkExprNum(const Stmt* S) { 189786946745225096243f6969dc745267b78fc211a6Ted Kremenek assert(S != NULL); 189863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (!BlkExprMap) { BlkExprMap = (void*) PopulateBlkExprMap(*this); } 18996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 190063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = reinterpret_cast<BlkExprMapTy*>(BlkExprMap); 190186946745225096243f6969dc745267b78fc211a6Ted Kremenek BlkExprMapTy::iterator I = M->find(S); 19023fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek return (I == M->end()) ? CFG::BlkExprNumTy() : CFG::BlkExprNumTy(I->second); 190363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 19047dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 190563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekunsigned CFG::getNumBlkExprs() { 190663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (const BlkExprMapTy* M = reinterpret_cast<const BlkExprMapTy*>(BlkExprMap)) 190763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return M->size(); 190863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek else { 190963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // We assume callers interested in the number of BlkExprs will want 191063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // the map constructed if it doesn't already exist. 191163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMap = (void*) PopulateBlkExprMap(*this); 191263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return reinterpret_cast<BlkExprMapTy*>(BlkExprMap)->size(); 191363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek } 191463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 191563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 1916274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1917ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek// Filtered walking of the CFG. 1918ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek//===----------------------------------------------------------------------===// 1919ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1920ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenekbool CFGBlock::FilterEdge(const CFGBlock::FilterOptions &F, 1921be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const CFGBlock *From, const CFGBlock *To) { 1922ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1923ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek if (F.IgnoreDefaultsWithCoveredEnums) { 1924ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek // If the 'To' has no label or is labeled but the label isn't a 1925ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek // CaseStmt then filter this edge. 1926ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek if (const SwitchStmt *S = 1927be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek dyn_cast_or_null<SwitchStmt>(From->getTerminator())) { 1928ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek if (S->isAllEnumCasesCovered()) { 1929be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek const Stmt *L = To->getLabel(); 1930be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek if (!L || !isa<CaseStmt>(L)) 1931be39a566a914df8561d7a1e9654708297f0908c1Ted Kremenek return true; 1932ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 1933ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 1934ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek } 1935ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1936ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek return false; 1937ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek} 1938ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek 1939ee7f84d509c6382491673883598eb9ed2d3a6a8bTed Kremenek//===----------------------------------------------------------------------===// 1940274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek// Cleanup: CFG dstor. 1941274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1942274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek 194363f5887f316fb52d243fcbb3631c039de6c4b993Ted KremenekCFG::~CFG() { 194463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek delete reinterpret_cast<const BlkExprMapTy*>(BlkExprMap); 194563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 19466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19477dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 19487dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG pretty printing 19497dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 19507dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 195142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremeneknamespace { 19522bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek 1953ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass StmtPrinterHelper : public PrinterHelper { 195442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek typedef llvm::DenseMap<Stmt*,std::pair<unsigned,unsigned> > StmtMapTy; 195542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtMapTy StmtMap; 195642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek signed CurrentBlock; 195742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned CurrentStmt; 1958e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LangOpts; 195942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenekpublic: 19601c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek 1961e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper(const CFG* cfg, const LangOptions &LO) 1962e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner : CurrentBlock(0), CurrentStmt(0), LangOpts(LO) { 196342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFG::const_iterator I = cfg->begin(), E = cfg->end(); I != E; ++I ) { 196442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned j = 1; 1965ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::const_iterator BI = (*I)->begin(), BEnd = (*I)->end() ; 1966b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu BI != BEnd; ++BI, ++j ) { 1967b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGStmt CS = BI->getAs<CFGStmt>(); 1968b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu if (!CS.isValid()) 1969b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu continue; 1970b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu StmtMap[CS] = std::make_pair((*I)->getBlockID(),j); 197142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 1972b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu } 1973fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 19746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 197542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek virtual ~StmtPrinterHelper() {} 19766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1977e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &getLangOpts() const { return LangOpts; } 197842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setBlockID(signed i) { CurrentBlock = i; } 197942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setStmtID(unsigned i) { CurrentStmt = i; } 19806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1981a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek virtual bool handledStmt(Stmt* Terminator, llvm::raw_ostream& OS) { 19826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1983411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek StmtMapTy::iterator I = StmtMap.find(Terminator); 1984fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 198542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (I == StmtMap.end()) 198642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (CurrentBlock >= 0 && I->second.first == (unsigned) CurrentBlock 19893fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek && I->second.second == CurrentStmt) { 199042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19913fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek } 19926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19933fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "[B" << I->second.first << "." << I->second.second << "]"; 19941c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return true; 199542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 199642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek}; 1997e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 1998e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 1999e8ee26b49d68ae3ffdf9a990ff7511ef55afa04cTed Kremenek 2000e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnernamespace { 2001ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass CFGBlockTerminatorPrint 20026fa9b88e2c3d47d606a273df2f8d03509bcff0b9Ted Kremenek : public StmtVisitor<CFGBlockTerminatorPrint,void> { 20036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2004a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_ostream& OS; 200542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtPrinterHelper* Helper; 2006d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor PrintingPolicy Policy; 2007d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenekpublic: 2008d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor CFGBlockTerminatorPrint(llvm::raw_ostream& os, StmtPrinterHelper* helper, 2009e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const PrintingPolicy &Policy) 2010d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor : OS(os), Helper(helper), Policy(Policy) {} 20116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2012d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitIfStmt(IfStmt* I) { 2013d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "if "; 2014d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getCond()->printPretty(OS,Helper,Policy); 2015d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2017d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Default case. 20186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump void VisitStmt(Stmt* Terminator) { 20196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Terminator->printPretty(OS, Helper, Policy); 20206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 20216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2022d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitForStmt(ForStmt* F) { 2023d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "for (" ; 20243fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInit()) 20253fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 2026535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 20273fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = F->getCond()) 20283fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 2029535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 20303fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInc()) 20313fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 2032a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << ")"; 2033d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2035d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitWhileStmt(WhileStmt* W) { 2036d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "while " ; 20373fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = W->getCond()) 20383fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 2039d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2041d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitDoStmt(DoStmt* D) { 2042d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "do ... while "; 20433fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = D->getCond()) 20443fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 20459da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 20466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2047411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek void VisitSwitchStmt(SwitchStmt* Terminator) { 20489da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek OS << "switch "; 2049d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor Terminator->getCond()->printPretty(OS, Helper, Policy); 20509da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 20516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20525d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump void VisitCXXTryStmt(CXXTryStmt* CS) { 20535d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "try ..."; 20545d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 20555d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 2056805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitConditionalOperator(ConditionalOperator* C) { 2057d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 20586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << " ? ... : ..."; 2059805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2061aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek void VisitChooseExpr(ChooseExpr* C) { 2062aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek OS << "__builtin_choose_expr( "; 2063d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 2064a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " )"; 2065aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek } 20666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20671c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek void VisitIndirectGotoStmt(IndirectGotoStmt* I) { 20681c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "goto *"; 2069d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getTarget()->printPretty(OS, Helper, Policy); 20701c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2072805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitBinaryOperator(BinaryOperator* B) { 2073805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek if (!B->isLogicalOp()) { 2074805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek VisitExpr(B); 2075805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2076805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2078d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor B->getLHS()->printPretty(OS, Helper, Policy); 20796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2080805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek switch (B->getOpcode()) { 20812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: 2082a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " || ..."; 2083805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 20842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 2085a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " && ..."; 2086805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2087805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek default: 2088805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek assert(false && "Invalid logical operator."); 20896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2090805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20920b1d9b7557437176f9cea1283bfac2510812beceTed Kremenek void VisitExpr(Expr* E) { 2093d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor E->printPretty(OS, Helper, Policy); 20946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2095d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2096e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 2097e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 20986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2099e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_stmt(llvm::raw_ostream &OS, StmtPrinterHelper* Helper, 2100079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump const CFGElement &E) { 2101b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu CFGStmt CS = E.getAs<CFGStmt>(); 2102b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu if (!CS) 2103b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu return; 2104b36cd3e1757fb4fcd9509f35558c847b04bef35fZhongxing Xu Stmt *S = CS.getStmt(); 21054e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek 21061c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Helper) { 21071c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for statement-expressions. 21084e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (StmtExpr* SE = dyn_cast<StmtExpr>(S)) { 21091c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek CompoundStmt* Sub = SE->getSubStmt(); 21106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21111c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Sub->child_begin() != Sub->child_end()) { 211260266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << "({ ... ; "; 21137a9d9d71fa208dc23fd67d03ce052d4ef60a8d04Ted Kremenek Helper->handledStmt(*SE->getSubStmt()->body_rbegin(),OS); 211460266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << " })\n"; 21151c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 21161c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21171c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21191c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for comma expressions. 21204e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(S)) { 21212de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (B->getOpcode() == BO_Comma) { 21221c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "... , "; 21231c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek Helper->handledStmt(B->getRHS(),OS); 21241c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << '\n'; 21251c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 21266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 21276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 21281c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21304e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek S->printPretty(OS, Helper, PrintingPolicy(Helper->getLangOpts())); 21314e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek 21324e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (isa<CXXOperatorCallExpr>(S)) { 21334e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek OS << " (OperatorCall)"; 21344e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek } 21354e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek else if (isa<CXXBindTemporaryExpr>(S)) { 21364e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek OS << " (BindTemporary)"; 21374e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek } 21384e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek 21396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21401c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // Expressions need a newline. 21414e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek if (isa<Expr>(S)) 21424e0cfa8eacf76f203d6ee6ce164162ccd4275ccdTed Kremenek OS << '\n'; 21431c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek} 21446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2145e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_block(llvm::raw_ostream& OS, const CFG* cfg, 2146e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const CFGBlock& B, 2147e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper* Helper, bool print_edges) { 21486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 214942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(B.getBlockID()); 21506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21517dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Print the header. 21526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << "\n [ B" << B.getBlockID(); 21536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 215442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (&B == &cfg->getEntry()) 215542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (ENTRY) ]\n"; 215642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == &cfg->getExit()) 215742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (EXIT) ]\n"; 215842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == cfg->getIndirectGotoBlock()) 21597dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OS << " (INDIRECT GOTO DISPATCH) ]\n"; 216042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else 216142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " ]\n"; 21626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21639cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the label of this block. 2164079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Stmt* Label = const_cast<Stmt*>(B.getLabel())) { 216542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 216642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 216742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 21686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2169079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (LabelStmt* L = dyn_cast<LabelStmt>(Label)) 21709cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << L->getName(); 2171079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 21729cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "case "; 2173e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(OS, Helper, 2174e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21759cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (C->getRHS()) { 21769cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " ... "; 2177e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getRHS()->printPretty(OS, Helper, 2178e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21799cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 2180079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } else if (isa<DefaultStmt>(Label)) 21819cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "default"; 2182079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CXXCatchStmt *CS = dyn_cast<CXXCatchStmt>(Label)) { 21835d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "catch ("; 2184a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl()) 2185a1f93631a84621d77aeb627691da85a8991af188Mike Stump CS->getExceptionDecl()->print(OS, PrintingPolicy(Helper->getLangOpts()), 2186a1f93631a84621d77aeb627691da85a8991af188Mike Stump 0); 2187a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 2188a1f93631a84621d77aeb627691da85a8991af188Mike Stump OS << "..."; 21895d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << ")"; 21905d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 21915d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else 219242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek assert(false && "Invalid label statement in CFGBlock."); 21936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21949cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << ":\n"; 21959cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 21966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2197fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // Iterate through the statements in the block and print them. 2198fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned j = 1; 21996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 220042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_iterator I = B.begin(), E = B.end() ; 220142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E ; ++I, ++j ) { 22026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22039cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the statement # in the basic block and the statement itself. 220442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 220542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 22066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2207a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek OS << llvm::format("%3d", j) << ": "; 22086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 220942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) 221042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek Helper->setStmtID(j); 22116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22121c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek print_stmt(OS,Helper,*I); 2213fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22159cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the terminator of this block. 221642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (B.getTerminator()) { 221742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 221842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 22196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22209cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " T: "; 22216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 222242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(-1); 22236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2224e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, Helper, 2225e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 222642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek TPrinter.Visit(const_cast<Stmt*>(B.getTerminator())); 2227a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << '\n'; 2228fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22309cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (print_edges) { 22319cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the predecessors of this block. 223242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Predecessors (" << B.pred_size() << "):"; 22339cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek unsigned i = 0; 223442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 223542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_pred_iterator I = B.pred_begin(), E = B.pred_end(); 223642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 22376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 223842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) == 0) 22399cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 22406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22419cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " B" << (*I)->getBlockID(); 22429cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 22436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22449cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 22456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22469cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the successors of this block. 224742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Successors (" << B.succ_size() << "):"; 22489cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek i = 0; 224942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 225042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_succ_iterator I = B.succ_begin(), E = B.succ_end(); 225142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 22526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 225342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) % 10 == 0) 22549cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 225542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2256e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (*I) 2257e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " B" << (*I)->getBlockID(); 2258e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump else 2259e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " NULL"; 2260fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22629cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 2263fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 226542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 226642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 226742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simple pretty printer of a CFG that outputs to stderr. 2268e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::dump(const LangOptions &LO) const { print(llvm::errs(), LO); } 226942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 227042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFG that outputs to an ostream. 2271e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::print(llvm::raw_ostream &OS, const LangOptions &LO) const { 2272e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(this, LO); 22736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 227442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the entry block. 227542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getEntry(), &Helper, true); 22766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 227742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Iterate through the CFGBlocks and print them one by one. 227842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (const_iterator I = Blocks.begin(), E = Blocks.end() ; I != E ; ++I) { 227942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Skip the entry block, because we already printed it. 2280ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (&(**I) == &getEntry() || &(**I) == &getExit()) 228142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek continue; 22826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2283ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek print_block(OS, this, **I, &Helper, true); 228442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 22856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 228642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the exit block. 228742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getExit(), &Helper, true); 2288d0172439194b28bae62a94a0a25d58e6d21e7a14Ted Kremenek OS.flush(); 22896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 229042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 229142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simply pretty printer of a CFGBlock that outputs to stderr. 2292e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::dump(const CFG* cfg, const LangOptions &LO) const { 2293e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner print(llvm::errs(), cfg, LO); 2294e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} 229542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 229642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFGBlock that outputs to an ostream. 229742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// Generally this will only be called from CFG::print. 2298e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::print(llvm::raw_ostream& OS, const CFG* cfg, 2299e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LO) const { 2300e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(cfg, LO); 230142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, cfg, *this, &Helper, true); 2302026473c2175424a039f51ca8949937268721b965Ted Kremenek} 23037dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2304a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek/// printTerminator - A simple pretty printer of the terminator of a CFGBlock. 2305e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::printTerminator(llvm::raw_ostream &OS, 23066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump const LangOptions &LO) const { 2307e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, NULL, PrintingPolicy(LO)); 2308a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek TPrinter.Visit(const_cast<Stmt*>(getTerminator())); 2309a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek} 2310a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 2311390e48b15ad93f85bfd1e33b9992c198fa0db475Ted KremenekStmt* CFGBlock::getTerminatorCondition() { 23126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2313411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (!Terminator) 2314411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return NULL; 23156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2316411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek Expr* E = NULL; 23176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2318411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek switch (Terminator->getStmtClass()) { 2319411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek default: 2320411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2322411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ForStmtClass: 2323411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ForStmt>(Terminator)->getCond(); 2324411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2326411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::WhileStmtClass: 2327411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<WhileStmt>(Terminator)->getCond(); 2328411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2330411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::DoStmtClass: 2331411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<DoStmt>(Terminator)->getCond(); 2332411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2334411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IfStmtClass: 2335411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IfStmt>(Terminator)->getCond(); 2336411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2338411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ChooseExprClass: 2339411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ChooseExpr>(Terminator)->getCond(); 2340411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2342411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IndirectGotoStmtClass: 2343411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IndirectGotoStmt>(Terminator)->getTarget(); 2344411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2346411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::SwitchStmtClass: 2347411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<SwitchStmt>(Terminator)->getCond(); 2348411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2350411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ConditionalOperatorClass: 2351411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ConditionalOperator>(Terminator)->getCond(); 2352411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2354411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::BinaryOperatorClass: // '&&' and '||' 2355411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<BinaryOperator>(Terminator)->getLHS(); 2356390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek break; 23576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2358390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 23596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Terminator; 2360411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 23616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2362411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return E ? E->IgnoreParens() : NULL; 2363411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek} 2364411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 23659c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenekbool CFGBlock::hasBinaryBranchTerminator() const { 23666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23679c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek if (!Terminator) 23689c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23709c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek Expr* E = NULL; 23716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23729c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek switch (Terminator->getStmtClass()) { 23739c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek default: 23749c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump case Stmt::ForStmtClass: 23779c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::WhileStmtClass: 23789c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::DoStmtClass: 23799c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::IfStmtClass: 23809c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ChooseExprClass: 23819c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ConditionalOperatorClass: 23829c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::BinaryOperatorClass: 23836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return true; 23849c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek } 23856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23869c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return E ? E->IgnoreParens() : NULL; 23879c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek} 23889c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek 2389a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 23907dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23917dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG Graphviz Visualization 23927dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23937dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 239442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 239542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 23966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumpstatic StmtPrinterHelper* GraphHelper; 239742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 239842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2399e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::viewCFG(const LangOptions &LO) const { 240042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 2401e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper H(this, LO); 240242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = &H; 240342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek llvm::ViewGraph(this,"CFG"); 240442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = NULL; 240542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 240642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek} 240742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 24087dba8607e59096014b7139ff20ef00870041d518Ted Kremeneknamespace llvm { 24097dba8607e59096014b7139ff20ef00870041d518Ted Kremenektemplate<> 24107dba8607e59096014b7139ff20ef00870041d518Ted Kremenekstruct DOTGraphTraits<const CFG*> : public DefaultDOTGraphTraits { 2411006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2412006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 2413006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2414006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const CFGBlock* Node, const CFG* Graph) { 24157dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2416bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#ifndef NDEBUG 2417a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string OutSStr; 2418a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_string_ostream Out(OutSStr); 241942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(Out,Graph, *Node, GraphHelper, false); 2420a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string& OutStr = Out.str(); 24217dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 24227dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); 24237dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 24247dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Process string output to make it nicer... 24257dba8607e59096014b7139ff20ef00870041d518Ted Kremenek for (unsigned i = 0; i != OutStr.length(); ++i) 24267dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[i] == '\n') { // Left justify 24277dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr[i] = '\\'; 24287dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr.insert(OutStr.begin()+i+1, 'l'); 24297dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 24306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 24317dba8607e59096014b7139ff20ef00870041d518Ted Kremenek return OutStr; 2432bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#else 2433bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser return ""; 2434bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#endif 24357dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 24367dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 24377dba8607e59096014b7139ff20ef00870041d518Ted Kremenek} // end namespace llvm 2438