CFG.cpp revision 334c19566104d3333cf662f0017088a18eddfa81
1fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===--- CFG.cpp - Classes for representing and building CFGs----*- C++ -*-===// 2fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 3fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// The LLVM Compiler Infrastructure 4fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 7fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 8fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===----------------------------------------------------------------------===// 9fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 10fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// This file defines the CFG and CFGBuilder classes for representing and 11fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// building Control-Flow Graphs (CFGs) from ASTs. 12fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek// 13fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek//===----------------------------------------------------------------------===// 14fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 15bd0487825751230a4396952b770349d2beac60b3Ted Kremenek#include "clang/Analysis/Support/SaveAndRestore.h" 16e41611aa2237d06a0ef61db4528fb2883a8defcdTed Kremenek#include "clang/Analysis/CFG.h" 17b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump#include "clang/AST/DeclCXX.h" 18c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek#include "clang/AST/StmtVisitor.h" 1942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#include "clang/AST/PrettyPrinter.h" 207dba8607e59096014b7139ff20ef00870041d518Ted Kremenek#include "llvm/Support/GraphWriter.h" 216cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/Support/Allocator.h" 226cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/Support/Format.h" 236cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/ADT/DenseMap.h" 246cb7c1a43b0c8f739d1f54b7fdae5ede86033496Benjamin Kramer#include "llvm/ADT/SmallPtrSet.h" 250ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek#include "llvm/ADT/OwningPtr.h" 2683c01da96f57cf732a5da9a83e2981241f205dc4Ted Kremenek 27fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenekusing namespace clang; 28fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 29fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremeneknamespace { 30fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 314afa39deaa245592977136d367251ee2c173dd8dDouglas Gregorstatic SourceLocation GetEndLoc(Decl* D) { 32c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek if (VarDecl* VD = dyn_cast<VarDecl>(D)) 33c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek if (Expr* Ex = VD->getInit()) 34c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek return Ex->getSourceRange().getEnd(); 356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return D->getLocation(); 37c7eb9031159f30a63db960fad4640d779f1617c8Ted Kremenek} 38ad5a894df1841698c824381b414630799adc26caTed Kremenek 39852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekclass AddStmtChoice { 40852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekpublic: 415ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek enum Kind { NotAlwaysAdd = 0, 425ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AlwaysAdd = 1, 435ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AsLValueNotAlwaysAdd = 2, 445ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AlwaysAddAsLValue = 3 }; 455ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek 46792bea97c42dabffce457cc79f6bfede9ed21712Benjamin Kramer AddStmtChoice(Kind kind) : k(kind) {} 475ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek 48792bea97c42dabffce457cc79f6bfede9ed21712Benjamin Kramer bool alwaysAdd() const { return (unsigned)k & 0x1; } 49431ac2d9c2f7596af6187daf88be411cb1ea34cfTed Kremenek bool asLValue() const { return k >= AsLValueNotAlwaysAdd; } 505ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek 51852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenekprivate: 52792bea97c42dabffce457cc79f6bfede9ed21712Benjamin Kramer Kind k; 53852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek}; 546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 55a34ea072371154c9042ce86321d17fbb4df1f84dTed Kremenek/// CFGBuilder - This class implements CFG construction from an AST. 56fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// The builder is stateful: an instance of the builder should be used to only 57fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// construct a single CFG. 58fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 59fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// Example usage: 60fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 61fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFGBuilder builder; 62fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// CFG* cfg = builder.BuildAST(stmt1); 63fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek/// 646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// CFG construction is done via a recursive walk of an AST. We actually parse 656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// the AST in reverse order so that the successor of a basic block is 666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// constructed prior to its predecessor. This allows us to nicely capture 676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// implicit fall-throughs without extra basic blocks. 68c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek/// 69ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass CFGBuilder { 70e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump ASTContext *Context; 710ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek llvm::OwningPtr<CFG> cfg; 72ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek 73fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBlock* Block; 74fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBlock* Succ; 75bf15b278a439d73b605ec00a8d3977ef305712f4Ted Kremenek CFGBlock* ContinueTargetBlock; 768a294713e032e4a27bae61c040abb41397952676Ted Kremenek CFGBlock* BreakTargetBlock; 77b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek CFGBlock* SwitchTerminatedBlock; 78eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek CFGBlock* DefaultCaseBlock; 795d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* TryTerminatedBlock; 806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // LabelMap records the mapping from Label expressions to their blocks. 820cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek typedef llvm::DenseMap<LabelStmt*,CFGBlock*> LabelMapTy; 830cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek LabelMapTy LabelMap; 846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // A list of blocks that end with a "goto" that must be backpatched to their 866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // resolved targets upon completion of CFG construction. 874a2b8a10c4730eb2ceeec24505bef26eb7d829edTed Kremenek typedef std::vector<CFGBlock*> BackpatchBlocksTy; 880cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek BackpatchBlocksTy BackpatchBlocks; 896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // A list of labels whose address has been taken (for indirect gotos). 9119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek typedef llvm::SmallPtrSet<LabelStmt*,5> LabelSetTy; 9219bb356317952445b03ee341c02f6147083c9eeaTed Kremenek LabelSetTy AddressTakenLabels; 936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumppublic: 95ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek explicit CFGBuilder() : cfg(new CFG()), // crew a new CFG 96ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Block(NULL), Succ(NULL), 978a294713e032e4a27bae61c040abb41397952676Ted Kremenek ContinueTargetBlock(NULL), BreakTargetBlock(NULL), 985d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump SwitchTerminatedBlock(NULL), DefaultCaseBlock(NULL), 995d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump TryTerminatedBlock(NULL) {} 1006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 101d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // buildCFG - Used by external clients to construct the CFG. 102ad5a894df1841698c824381b414630799adc26caTed Kremenek CFG* buildCFG(const Decl *D, Stmt *Statement, ASTContext *C, 103ad5a894df1841698c824381b414630799adc26caTed Kremenek bool pruneTriviallyFalseEdges, bool AddEHEdges, 1044c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddScopes); 1056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenekprivate: 1074f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Visitors to walk an AST and construct the CFG. 108852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitAddrLabelExpr(AddrLabelExpr *A, AddStmtChoice asc); 109852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBinaryOperator(BinaryOperator *B, AddStmtChoice asc); 110852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBlockExpr(BlockExpr* E, AddStmtChoice asc); 1114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitBreakStmt(BreakStmt *B); 1127ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXCatchStmt(CXXCatchStmt *S); 1137ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXThrowExpr(CXXThrowExpr *T); 1147ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXTryStmt(CXXTryStmt *S); 115c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu CFGBlock *VisitCXXMemberCallExpr(CXXMemberCallExpr *C, AddStmtChoice asc); 116852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitCallExpr(CallExpr *C, AddStmtChoice asc); 1174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitCaseStmt(CaseStmt *C); 118852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitChooseExpr(ChooseExpr *C, AddStmtChoice asc); 1193fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitCompoundStmt(CompoundStmt *C); 1207ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitConditionalOperator(ConditionalOperator *C, AddStmtChoice asc); 1213fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitContinueStmt(ContinueStmt *C); 1224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclStmt(DeclStmt *DS); 1234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclSubExpr(Decl* D); 1243fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDefaultStmt(DefaultStmt *D); 1253fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDoStmt(DoStmt *D); 1263fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitForStmt(ForStmt *F); 1274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitGotoStmt(GotoStmt* G); 1284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIfStmt(IfStmt *I); 1294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIndirectGotoStmt(IndirectGotoStmt *I); 1304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitLabelStmt(LabelStmt *L); 131115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock *VisitMemberExpr(MemberExpr *M, AddStmtChoice asc); 1324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtCatchStmt(ObjCAtCatchStmt *S); 1334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S); 1344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtThrowStmt(ObjCAtThrowStmt *S); 1354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtTryStmt(ObjCAtTryStmt *S); 1364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCForCollectionStmt(ObjCForCollectionStmt *S); 1374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitReturnStmt(ReturnStmt* R); 138852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, AddStmtChoice asc); 139852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmtExpr(StmtExpr *S, AddStmtChoice asc); 1404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitSwitchStmt(SwitchStmt *S); 1414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitWhileStmt(WhileStmt *W); 1424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 143852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *Visit(Stmt *S, AddStmtChoice asc = AddStmtChoice::NotAlwaysAdd); 144852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmt(Stmt *S, AddStmtChoice asc); 1454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitChildren(Stmt* S); 146cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 147274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek // NYS == Not Yet Supported 148274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek CFGBlock* NYS() { 1494102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = true; 1504102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek return Block; 1514102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek } 1526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 153079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump CFGBlock *StartScope(Stmt *S, CFGBlock *B) { 154079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (!AddScopes) 155079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return B; 156079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 157079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (B == 0) 158079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump B = createBlock(); 159079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump B->StartScope(S, cfg->getBumpVectorContext()); 160079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return B; 161079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 162079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 163079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump void EndScope(Stmt *S) { 164079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (!AddScopes) 165079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return; 166079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 167079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Block == 0) 168079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block = createBlock(); 169079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block->EndScope(S, cfg->getBumpVectorContext()); 170079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 171079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 1724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek void autoCreateBlock() { if (!Block) Block = createBlock(); } 1734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *createBlock(bool add_successor = true); 1744e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek bool FinishBlock(CFGBlock* B); 175df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock *addStmt(Stmt *S) { 176df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu return Visit(S, AddStmtChoice::AlwaysAdd); 177852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 178ad5a894df1841698c824381b414630799adc26caTed Kremenek 179852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek void AppendStmt(CFGBlock *B, Stmt *S, 180852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { 181852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek B->appendStmt(S, cfg->getBumpVectorContext(), asc.asLValue()); 182ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 183ad5a894df1841698c824381b414630799adc26caTed Kremenek 184ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek void AddSuccessor(CFGBlock *B, CFGBlock *S) { 185ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek B->addSuccessor(S, cfg->getBumpVectorContext()); 186ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 1871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 188fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// TryResult - a class representing a variant over the values 189fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// 'true', 'false', or 'unknown'. This is returned by TryEvaluateBool, 190fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// and is used by the CFGBuilder to decide if a branch condition 191fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// can be decided up front during CFG construction. 192941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek class TryResult { 193941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek int X; 194941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek public: 195941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult(bool b) : X(b ? 1 : 0) {} 196941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult() : X(-1) {} 1971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 198941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isTrue() const { return X == 1; } 199941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isFalse() const { return X == 0; } 200941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isKnown() const { return X >= 0; } 201941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek void negate() { 202941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(isKnown()); 203941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek X ^= 0x1; 204941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek } 205941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek }; 2061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20700998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// TryEvaluateBool - Try and evaluate the Stmt and return 0 or 1 20800998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// if we can evaluate to a known value, otherwise return -1. 209941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult TryEvaluateBool(Expr *S) { 210ad5a894df1841698c824381b414630799adc26caTed Kremenek if (!PruneTriviallyFalseEdges) 211ad5a894df1841698c824381b414630799adc26caTed Kremenek return TryResult(); 212ad5a894df1841698c824381b414630799adc26caTed Kremenek 21300998a068e50945118f334c98af05ed44d7c22a6Mike Stump Expr::EvalResult Result; 2149983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor if (!S->isTypeDependent() && !S->isValueDependent() && 2159983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor S->Evaluate(Result, *Context) && Result.Val.isInt()) 216fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek return Result.Val.getInt().getBoolValue(); 217941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek 218941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return TryResult(); 21900998a068e50945118f334c98af05ed44d7c22a6Mike Stump } 22000998a068e50945118f334c98af05ed44d7c22a6Mike Stump 2214102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek bool badCFG; 2224c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 223ad5a894df1841698c824381b414630799adc26caTed Kremenek // True iff trivially false edges should be pruned from the CFG. 224ad5a894df1841698c824381b414630799adc26caTed Kremenek bool PruneTriviallyFalseEdges; 225ad5a894df1841698c824381b414630799adc26caTed Kremenek 2264c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump // True iff EH edges on CallExprs should be added to the CFG. 2274c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdges; 2284c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 2294c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump // True iff scope start and scope end notes should be added to the CFG. 230079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump bool AddScopes; 231d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 233898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// FIXME: Add support for dependent-sized array types in C++? 234898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// Does it even make sense to build a CFG for an uninstantiated template? 235610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenekstatic VariableArrayType* FindVA(Type* t) { 236610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek while (ArrayType* vt = dyn_cast<ArrayType>(t)) { 237610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt)) 238610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (vat->getSizeExpr()) 239610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return vat; 2406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 241610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek t = vt->getElementType().getTypePtr(); 242610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek } 2436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 244610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return 0; 245610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek} 2466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// BuildCFG - Constructs a CFG from an AST (a Stmt*). The AST can represent an 2486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// arbitrary statement. Examples include a single expression or a function 2496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// body (compound statement). The ownership of the returned CFG is 2506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// transferred to the caller. If CFG construction fails, this method returns 2516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// NULL. 252b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFGBuilder::buildCFG(const Decl *D, Stmt* Statement, ASTContext* C, 253ad5a894df1841698c824381b414630799adc26caTed Kremenek bool pruneTriviallyFalseEdges, 25455f988efeb08b84c2dd9e4c05990b88c81fe2b58Mike Stump bool addehedges, bool AddScopes) { 255ad5a894df1841698c824381b414630799adc26caTed Kremenek 25655f988efeb08b84c2dd9e4c05990b88c81fe2b58Mike Stump AddEHEdges = addehedges; 257ad5a894df1841698c824381b414630799adc26caTed Kremenek PruneTriviallyFalseEdges = pruneTriviallyFalseEdges; 258ad5a894df1841698c824381b414630799adc26caTed Kremenek 259e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump Context = C; 2600ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek assert(cfg.get()); 2614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!Statement) 2624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return NULL; 263d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 264079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump this->AddScopes = AddScopes; 2654102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = false; 2666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block that will serve as the exit block for the CFG. Since 2686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // this is the first block added to the CFG, it will be implicitly registered 2696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // as the exit block. 27049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = createBlock(); 271ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek assert(Succ == &cfg->getExit()); 27249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; // the EXIT block is empty. Create all other blocks lazily. 2736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 274d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Visit the statements and create the CFG. 2754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* B = addStmt(Statement); 276b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump 277b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump if (const CXXConstructorDecl *CD = dyn_cast_or_null<CXXConstructorDecl>(D)) { 278b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump // FIXME: Add code for base initializers and member initializers. 279b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump (void)CD; 280b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump } 2810ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek if (!B) 2820ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek B = Succ; 2836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 284c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (B) { 285c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Finalize the last constructed block. This usually involves reversing the 286c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // order of the statements in the block. 287c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (Block) FinishBlock(B); 288c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar 289c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Backpatch the gotos whose label -> block mappings we didn't know when we 290c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // encountered them. 291c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar for (BackpatchBlocksTy::iterator I = BackpatchBlocks.begin(), 292d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek E = BackpatchBlocks.end(); I != E; ++I ) { 2936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 294c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar CFGBlock* B = *I; 295c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar GotoStmt* G = cast<GotoStmt>(B->getTerminator()); 296c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar LabelMapTy::iterator LI = LabelMap.find(G->getLabel()); 297d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 298c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // If there is no target for the goto, then we are looking at an 299c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // incomplete AST. Handle this by not registering a successor. 300c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (LI == LabelMap.end()) continue; 3016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 302c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar AddSuccessor(B, LI->second); 303c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 3046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 305c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Add successors to the Indirect Goto Dispatch block (if we have one). 306c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (CFGBlock* B = cfg->getIndirectGotoBlock()) 307c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar for (LabelSetTy::iterator I = AddressTakenLabels.begin(), 30819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek E = AddressTakenLabels.end(); I != E; ++I ) { 30919bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 310c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Lookup the target block. 311c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar LabelMapTy::iterator LI = LabelMap.find(*I); 31219bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 313c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // If there is no target block that contains label, then we are looking 314c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // at an incomplete AST. Handle this by not registering a successor. 315c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (LI == LabelMap.end()) continue; 3166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 317c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar AddSuccessor(B, LI->second); 318c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 3196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 320c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar Succ = B; 321c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 3226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 3236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty entry block that has no predecessors. 324322f58d3830da13b419646c071e3ab801518a09cTed Kremenek cfg->setEntry(createBlock()); 3256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 326da9b30ea415af1de659524c28793e2597342f6e8Ted Kremenek return badCFG ? NULL : cfg.take(); 327d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 329d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// createBlock - Used to lazily create blocks that are connected 330d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// to the current (global) succcessor. 3316d9828c82c9321f042ab416fd2ffaa3034347d45Mike StumpCFGBlock* CFGBuilder::createBlock(bool add_successor) { 3329438252ad2ecae5338df565ca33c6969e4fbfa41Ted Kremenek CFGBlock* B = cfg->createBlock(); 3334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (add_successor && Succ) 334ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(B, Succ); 335d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return B; 336d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 3386c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek/// FinishBlock - "Finalize" the block by checking if we have a bad CFG. 3394e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenekbool CFGBuilder::FinishBlock(CFGBlock* B) { 3404e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (badCFG) 3414e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return false; 3424e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek 3434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(B); 3444e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return true; 345d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 346d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 3474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// Visit - Walk the subtree of a statement and add extra 3486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// blocks for ternary operators, &&, and ||. We also process "," and 3496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// DeclStmts (which may contain nested control-flow). 350852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::Visit(Stmt * S, AddStmtChoice asc) { 3514f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenektryAgain: 352f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek if (!S) { 353f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek badCFG = true; 354f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek return 0; 355f42e3371079de333c3822a060c008bf6680677c8Ted Kremenek } 3564f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek switch (S->getStmtClass()) { 3574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek default: 358852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, asc); 3594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::AddrLabelExprClass: 361852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitAddrLabelExpr(cast<AddrLabelExpr>(S), asc); 3621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3634f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BinaryOperatorClass: 364852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBinaryOperator(cast<BinaryOperator>(S), asc); 3651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BlockExprClass: 367852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBlockExpr(cast<BlockExpr>(S), asc); 3684f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BreakStmtClass: 3704f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitBreakStmt(cast<BreakStmt>(S)); 3711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CallExprClass: 373852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitCallExpr(cast<CallExpr>(S), asc); 3741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CaseStmtClass: 3764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCaseStmt(cast<CaseStmt>(S)); 3774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ChooseExprClass: 379852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitChooseExpr(cast<ChooseExpr>(S), asc); 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CompoundStmtClass: 3824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(cast<CompoundStmt>(S)); 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ConditionalOperatorClass: 385852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitConditionalOperator(cast<ConditionalOperator>(S), asc); 3861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ContinueStmtClass: 3884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitContinueStmt(cast<ContinueStmt>(S)); 3891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 390021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXCatchStmtClass: 391021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXCatchStmt(cast<CXXCatchStmt>(S)); 392021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek 393c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu case Stmt::CXXMemberCallExprClass: 394c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitCXXMemberCallExpr(cast<CXXMemberCallExpr>(S), asc); 395c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 396021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXThrowExprClass: 397021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXThrowExpr(cast<CXXThrowExpr>(S)); 398ad5a894df1841698c824381b414630799adc26caTed Kremenek 399021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXTryStmtClass: 400021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXTryStmt(cast<CXXTryStmt>(S)); 401ad5a894df1841698c824381b414630799adc26caTed Kremenek 4024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DeclStmtClass: 4034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclStmt(cast<DeclStmt>(S)); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DefaultStmtClass: 4064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDefaultStmt(cast<DefaultStmt>(S)); 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DoStmtClass: 4094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDoStmt(cast<DoStmt>(S)); 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ForStmtClass: 4124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitForStmt(cast<ForStmt>(S)); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::GotoStmtClass: 4154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitGotoStmt(cast<GotoStmt>(S)); 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IfStmtClass: 4184f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIfStmt(cast<IfStmt>(S)); 4191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IndirectGotoStmtClass: 4214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIndirectGotoStmt(cast<IndirectGotoStmt>(S)); 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::LabelStmtClass: 4244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitLabelStmt(cast<LabelStmt>(S)); 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 426115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek case Stmt::MemberExprClass: 427115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return VisitMemberExpr(cast<MemberExpr>(S), asc); 428115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 4294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtCatchStmtClass: 4301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return VisitObjCAtCatchStmt(cast<ObjCAtCatchStmt>(S)); 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 4334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S)); 4341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtThrowStmtClass: 4364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtThrowStmt(cast<ObjCAtThrowStmt>(S)); 4371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtTryStmtClass: 4394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtTryStmt(cast<ObjCAtTryStmt>(S)); 4401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCForCollectionStmtClass: 4424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S)); 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ParenExprClass: 4454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek S = cast<ParenExpr>(S)->getSubExpr(); 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump goto tryAgain; 4471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::NullStmtClass: 4494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ReturnStmtClass: 4524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitReturnStmt(cast<ReturnStmt>(S)); 4531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SizeOfAlignOfExprClass: 455852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitSizeOfAlignOfExpr(cast<SizeOfAlignOfExpr>(S), asc); 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::StmtExprClass: 458852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmtExpr(cast<StmtExpr>(S), asc); 4591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SwitchStmtClass: 4614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitSwitchStmt(cast<SwitchStmt>(S)); 4621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4634f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::WhileStmtClass: 4644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitWhileStmt(cast<WhileStmt>(S)); 4654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 4664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 468852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitStmt(Stmt *S, AddStmtChoice asc) { 469852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4704f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 471852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, S, asc); 4726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitChildren(S); 4754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitChildren - Visit the children of a Stmt. 4784f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitChildren(Stmt* Terminator) { 4794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = Block; 4804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (Stmt::child_iterator I = Terminator->child_begin(), 4814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek E = Terminator->child_end(); I != E; ++I) { 4824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (*I) B = Visit(*I); 4836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return B; 4854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 487852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitAddrLabelExpr(AddrLabelExpr *A, 488852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek AddressTakenLabels.insert(A->getLabel()); 4906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 491852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4924f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 493852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, A, asc); 4946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4964f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4974f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 499852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBinaryOperator(BinaryOperator *B, 500852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 5014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (B->isLogicalOp()) { // && or || 5024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 503852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, B, asc); 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!FinishBlock(ConfluenceBlock)) 5064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 5071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the LHS 5094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* LHSBlock = createBlock(false); 5104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LHSBlock->setTerminator(B); 5111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the RHS 5134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = ConfluenceBlock; 5144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = NULL; 5154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* RHSBlock = addStmt(B->getRHS()); 516862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek 517862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek if (RHSBlock) { 518862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek if (!FinishBlock(RHSBlock)) 519862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek return 0; 520862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek } 521862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek else { 522862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek // Create an empty block for cases where the RHS doesn't require 523862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek // any explicit statements in the CFG. 524862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek RHSBlock = createBlock(); 525862b24f8e9b1a3b332399591e48b303f57f01d0aTed Kremenek } 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 528941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal = TryEvaluateBool(B->getLHS()); 529941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek if (KnownVal.isKnown() && (B->getOpcode() == BinaryOperator::LOr)) 530941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek KnownVal.negate(); 53100998a068e50945118f334c98af05ed44d7c22a6Mike Stump 5324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now link the LHSBlock with RHSBlock. 5334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (B->getOpcode() == BinaryOperator::LOr) { 534ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 535ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 5361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else { 5376db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(B->getOpcode() == BinaryOperator::LAnd); 538ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 539ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 54019bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 5411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Generate the blocks for evaluating the LHS. 5434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = LHSBlock; 5444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek else if (B->getOpcode() == BinaryOperator::Comma) { // , 5476dc534ecc19a045ebcfe93eefa45da509968e888Ted Kremenek autoCreateBlock(); 548852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, B, asc); 5494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(B->getRHS()); 5504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 552fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu else if (B->isAssignmentOp()) { 553fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (asc.alwaysAdd()) { 554fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu autoCreateBlock(); 555fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu AppendStmt(Block, B, asc); 556fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 557ad5a894df1841698c824381b414630799adc26caTed Kremenek 558fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu Visit(B->getRHS()); 559fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return Visit(B->getLHS(), AddStmtChoice::AsLValueNotAlwaysAdd); 560fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 5611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 562852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(B, asc); 5634f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 565852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBlockExpr(BlockExpr *E, AddStmtChoice asc) { 566852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 567721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek autoCreateBlock(); 568852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, E, asc); 569721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek } 570721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek return Block; 5714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 572cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 5734f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitBreakStmt(BreakStmt *B) { 5744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // "break" is a control-flow statement. Thus we stop processing the current 5754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // block. 5764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 5774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 5781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now create a new block that ends with the break statement. 5804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = createBlock(false); 5814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block->setTerminator(B); 5821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5834f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If there is no target for the break, then we are looking at an incomplete 5844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // AST. This means that the CFG cannot be constructed. 5854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (BreakTargetBlock) 586ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, BreakTargetBlock); 5874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek else 5884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek badCFG = true; 5891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 5924f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5944c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stumpstatic bool CanThrow(Expr *E) { 5954c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump QualType Ty = E->getType(); 5964c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Ty->isFunctionPointerType()) 5974c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<PointerType>()->getPointeeType(); 5984c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump else if (Ty->isBlockPointerType()) 5994c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<BlockPointerType>()->getPointeeType(); 600ad5a894df1841698c824381b414630799adc26caTed Kremenek 6014c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump const FunctionType *FT = Ty->getAs<FunctionType>(); 6024c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (FT) { 6034c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT)) 6044c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Proto->hasEmptyExceptionSpec()) 6054c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return false; 6064c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump } 6074c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return true; 6084c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump} 6094c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 610852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitCallExpr(CallExpr *C, AddStmtChoice asc) { 6114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If this is a call to a no-return function, this stops the block here. 6122455636163fdd18581d7fdae816433f886d88213Mike Stump bool NoReturn = false; 613264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola if (getFunctionExtInfo(*C->getCallee()->getType()).getNoReturn()) { 6142455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 6152455636163fdd18581d7fdae816433f886d88213Mike Stump } 6162455636163fdd18581d7fdae816433f886d88213Mike Stump 6174c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdge = false; 618079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 619079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Languages without exceptions are assumed to not throw. 620079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Context->getLangOptions().Exceptions) { 6214c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdges) 6224c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = true; 623079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 624079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 625079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FunctionDecl *FD = C->getDirectCallee()) { 6262455636163fdd18581d7fdae816433f886d88213Mike Stump if (FD->hasAttr<NoReturnAttr>()) 6272455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 628079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FD->hasAttr<NoThrowAttr>()) 6294c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 630079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6312455636163fdd18581d7fdae816433f886d88213Mike Stump 6324c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (!CanThrow(C->getCallee())) 6334c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 6344c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 635fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (!NoReturn && !AddEHEdge) { 636fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu if (asc.asLValue()) 637fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAddAsLValue); 638fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu else 639fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAdd); 640fc61d94fbdbcd2b423976e21f24d423fcd442486Zhongxing Xu } 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 642079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Block) { 643079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Succ = Block; 644079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (!FinishBlock(Block)) 645079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return 0; 646079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 648079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block = createBlock(!NoReturn); 649852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, C, asc); 6502455636163fdd18581d7fdae816433f886d88213Mike Stump 651079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (NoReturn) { 652079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Wire this to the exit block directly. 653079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 654079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6554c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdge) { 656079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Add exceptional edges. 657079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (TryTerminatedBlock) 658079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, TryTerminatedBlock); 659079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else 660079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 661079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6632455636163fdd18581d7fdae816433f886d88213Mike Stump return VisitChildren(C); 664d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 665d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 666852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitChooseExpr(ChooseExpr *C, 667852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 6683fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 669852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 6703fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek if (!FinishBlock(ConfluenceBlock)) 6713fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 673115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 674115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 675115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 6763fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6773fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 678df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* LHSBlock = Visit(C->getLHS(), asc); 6793fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek if (!FinishBlock(LHSBlock)) 6803fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6823fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6833fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 684df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* RHSBlock = Visit(C->getRHS(), asc); 6853fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek if (!FinishBlock(RHSBlock)) 6863fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6883fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = createBlock(false); 68900998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 690941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 691ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 692ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 6933fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block->setTerminator(C); 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return addStmt(C->getCond()); 6953fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek} 6961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6981eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpCFGBlock* CFGBuilder::VisitCompoundStmt(CompoundStmt* C) { 699079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump EndScope(C); 700079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 7011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CFGBlock* LastBlock = Block; 7024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 7034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (CompoundStmt::reverse_body_iterator I=C->body_rbegin(), E=C->body_rend(); 7044f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek I != E; ++I ) { 705334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek // If we hit a segment of code just containing ';' (NullStmts), we can 706334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek // get a null block back. In such cases, just use the LastBlock 707334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek if (CFGBlock *newBlock = addStmt(*I)) 708334c19566104d3333cf662f0017088a18eddfa81Ted Kremenek LastBlock = newBlock; 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 710e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek if (badCFG) 711e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek return NULL; 7121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 713079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 714079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump LastBlock = StartScope(C, LastBlock); 715079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 7164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return LastBlock; 7174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 7181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 719852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitConditionalOperator(ConditionalOperator *C, 720852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 721f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the confluence block that will "merge" the results of the ternary 722f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // expression. 723f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 724852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 725f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (!FinishBlock(ConfluenceBlock)) 726f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 7271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 728115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 729115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 730115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 731f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create a block for the LHS expression if there is an LHS expression. A 732f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // GCC extension allows LHS to be NULL, causing the condition to be the 733f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // value that is returned instead. 734f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // e.g: x ?: y is shorthand for: x ? x : y; 735f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 736f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 737f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* LHSBlock = NULL; 738f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (C->getLHS()) { 739df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu LHSBlock = Visit(C->getLHS(), asc); 740f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (!FinishBlock(LHSBlock)) 741f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 742f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 743f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 745f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block for the RHS expression. 746f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 747df119892cf291847d6aebb117512225a8e67c0d5Zhongxing Xu CFGBlock* RHSBlock = Visit(C->getRHS(), asc); 748f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (!FinishBlock(RHSBlock)) 749f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 7501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 751f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block that will contain the condition. 752f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = createBlock(false); 7531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 75400998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 755941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 756e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (LHSBlock) { 757ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 758e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 759941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek if (KnownVal.isFalse()) { 760e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we know the condition is false, add NULL as the successor for 761e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the block containing the condition. In this case, the confluence 762e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // block will have just one predecessor. 763ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, 0); 764941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 1); 765e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 766e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we have no LHS expression, add the ConfluenceBlock as a direct 767e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // successor for the block containing the condition. Moreover, we need to 768e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // reverse the order of the predecessors in the ConfluenceBlock because 769e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the RHSBlock will have been added to the succcessors already, and we 770e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // want the first predecessor to the the block containing the expression 771e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // for the case when the ternary expression evaluates to true. 772ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ConfluenceBlock); 773941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 2); 774e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump std::reverse(ConfluenceBlock->pred_begin(), 775e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump ConfluenceBlock->pred_end()); 776e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } 777f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 779ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 780f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block->setTerminator(C); 781f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return addStmt(C->getCond()); 782f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek} 783f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek 7844f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclStmt(DeclStmt *DS) { 7854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 7866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 7874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (DS->isSingleDecl()) { 788ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DS); 7894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclSubExpr(DS->getSingleDecl()); 790d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek } 7911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7924f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = 0; 7931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7944f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: Add a reverse iterator for DeclStmt to avoid this extra copy. 7954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek typedef llvm::SmallVector<Decl*,10> BufTy; 7964f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BufTy Buf(DS->decl_begin(), DS->decl_end()); 7971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (BufTy::reverse_iterator I = Buf.rbegin(), E = Buf.rend(); I != E; ++I) { 7994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Get the alignment of the new DeclStmt, padding out to >=8 bytes. 8004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek unsigned A = llvm::AlignOf<DeclStmt>::Alignment < 8 8014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ? 8 : llvm::AlignOf<DeclStmt>::Alignment; 8021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Allocate the DeclStmt using the BumpPtrAllocator. It will get 8044f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // automatically freed with the CFG. 8054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclGroupRef DG(*I); 8064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Decl *D = *I; 8071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump void *Mem = cfg->getAllocator().Allocate(sizeof(DeclStmt), A); 8084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclStmt *DSNew = new (Mem) DeclStmt(DG, D->getLocation(), GetEndLoc(D)); 8091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Append the fake DeclStmt to block. 811ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DSNew); 8124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek B = VisitDeclSubExpr(D); 8134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 8141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return B; 8164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 8171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8184f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitDeclSubExpr - Utility method to add block-level expressions for 8194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// initializers in Decls. 8204f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclSubExpr(Decl* D) { 8214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(Block); 822d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek 8234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VarDecl *VD = dyn_cast<VarDecl>(D); 8241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8254f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!VD) 8264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 8271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Expr *Init = VD->getInit(); 8291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Init) { 8315ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AddStmtChoice::Kind k = 8325ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek VD->getType()->isReferenceType() ? AddStmtChoice::AsLValueNotAlwaysAdd 8335ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek : AddStmtChoice::NotAlwaysAdd; 8345ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek Visit(Init, AddStmtChoice(k)); 8354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 8361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If the type of VD is a VLA, then we must process its size expressions. 8384f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(VD->getType().getTypePtr()); VA != 0; 8394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA = FindVA(VA->getElementType().getTypePtr())) 8404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = addStmt(VA->getSizeExpr()); 8411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 843d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 844fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 845d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitIfStmt(IfStmt* I) { 8466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We may see an if statement in the middle of a basic block, or it may be the 8476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // first statement we are processing. In either case, we create a new basic 8486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. First, we create the blocks for the then...else statements, and 8496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // then we create the block containing the if statement. If we were in the 8506c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // middle of a block, we stop processing that block. That block is then the 8516c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // implicit successor for the "then" and "else" clauses. 8526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The block we were proccessing is now finished. Make it the successor 8546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 8556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 856d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = Block; 8574e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 8584e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 859c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 861b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the false branch. 862d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ElseBlock = Succ; 8636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 864d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* Else = I->getElse()) { 865d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 867d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block so that the recursive call to Visit will 8686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // create a new basic block. 869d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 8704f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ElseBlock = addStmt(Else); 8716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 872b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek if (!ElseBlock) // Can occur when the Else body has all NullStmts. 873b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek ElseBlock = sv.get(); 8744e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 8754e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(ElseBlock)) 8764e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8774e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 878c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 880b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the true branch. 881d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ThenBlock; 882d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 883d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Stmt* Then = I->getThen(); 8846db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Then); 885d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Block = NULL; 8874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ThenBlock = addStmt(Then); 8886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 889dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek if (!ThenBlock) { 890dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // We can reach here if the "then" body has all NullStmts. 891dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // Create an empty block so we can distinguish between true and false 892dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // branches in path-sensitive analyses. 893dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek ThenBlock = createBlock(false); 894ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ThenBlock, sv.get()); 8956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (Block) { 8964e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(ThenBlock)) 8974e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 8990cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek } 900d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 9016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now create a new block containing the if statement. 902d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 9036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 904d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Set the terminator of the new block to the If statement. 905d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(I); 9066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 90700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 908941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(I->getCond()); 90900998a068e50945118f334c98af05ed44d7c22a6Mike Stump 910d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now add the successors. 911ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : ThenBlock); 912ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue()? NULL : ElseBlock); 9136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the condition as the last statement in the new block. This may create 9156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // new blocks as the condition may contain control-flow. Any newly created 9166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // blocks will be pointed to be "Block". 91761dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek Block = addStmt(I->getCond()); 918ad5a894df1841698c824381b414630799adc26caTed Kremenek 91961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // Finally, if the IfStmt contains a condition variable, add both the IfStmt 92061dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // and the condition variable initialization to the CFG. 92161dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (VarDecl *VD = I->getConditionVariable()) { 92261dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (Expr *Init = VD->getInit()) { 92361dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek autoCreateBlock(); 92461dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek AppendStmt(Block, I, AddStmtChoice::AlwaysAdd); 92561dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek addStmt(Init); 92661dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 92761dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 928ad5a894df1841698c824381b414630799adc26caTed Kremenek 92961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek return Block; 930d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 9316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 933d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitReturnStmt(ReturnStmt* R) { 9346c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 935d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // 9366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NOTE: If a "return" appears in the middle of a block, this means that the 9376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // code afterwards is DEAD (unreachable). We still keep a basic block 9386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for that code; a simple "mark-and-sweep" from the entry block will be 9396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // able to report such dead blocks. 9406c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek if (Block) 9416c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek FinishBlock(Block); 942d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 943d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the new block. 944d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 9456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 946d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // The Exit block is the only successor. 947ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 9486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the return statement to the block. This may create new blocks if R 9506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // contains control-flow (short-circuit operations). 951852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(R, AddStmtChoice::AlwaysAdd); 952d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 9530cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek 954d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitLabelStmt(LabelStmt* L) { 955d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Get the block of the labeled statement. Add it to our map. 9564f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(L->getSubStmt()); 9572677ea871a25aa79f9db360f6ed10584c02267adTed Kremenek CFGBlock* LabelBlock = Block; 9586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!LabelBlock) // This can happen when the body is empty, i.e. 9604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LabelBlock = createBlock(); // scopes that only contains NullStmts. 9616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(LabelMap.find(L) == LabelMap.end() && "label already in map"); 963d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMap[ L ] = LabelBlock; 9646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Labels partition blocks, so this is the end of the basic block we were 9666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing (L is the block's label). Because this is label (and we have 9676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // already processed the substatement) there is no extra control-flow to worry 9686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // about. 9699cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek LabelBlock->setLabel(L); 9704e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(LabelBlock)) 9714e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 9726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary); 974d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 9756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 976d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // This block is now the implicit successor of other blocks. 977d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = LabelBlock; 9786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 979d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return LabelBlock; 980d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 98131dcd3c8c4df5a656f58f50ea73afc177c101c67Ted Kremenek 982d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitGotoStmt(GotoStmt* G) { 9836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Goto is a control-flow statement. Thus we stop processing the current 9846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block and create a new one. 9854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block) 9864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek FinishBlock(Block); 9874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 988d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 989d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(G); 9906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we already know the mapping to the label block add the successor now. 992d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMapTy::iterator I = LabelMap.find(G->getLabel()); 9936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 994d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (I == LabelMap.end()) 995d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We will need to backpatch this block later. 996d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BackpatchBlocks.push_back(Block); 997d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek else 998ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, I->second); 999d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 10006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 1001d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1002d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1003d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) { 1004d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 10056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1006fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "for" is a control-flow statement. Thus we stop processing the current 1007fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 1008d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 10094e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 10104e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1011d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 10124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 10134f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 10146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10153f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // Save the current value for the break targets. 10163f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // All breaks should go to the code following the loop. 10173f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek SaveAndRestore<CFGBlock*> save_break(BreakTargetBlock); 10183f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek BreakTargetBlock = LoopSuccessor; 10193f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek 10206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 10216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 10226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 102349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 102449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 10256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 102649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 10276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(F); 10286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 10306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 103149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = F->getCond()) { 103249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 103349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 103458b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 103558b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek 103658b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // If this block contains a condition variable, add both the condition 103758b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // variable and initializer to the CFG. 103858b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (VarDecl *VD = F->getConditionVariable()) { 103958b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (Expr *Init = VD->getInit()) { 104058b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek autoCreateBlock(); 104158b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek AppendStmt(Block, F, AddStmtChoice::AlwaysAdd); 104258b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek EntryConditionBlock = addStmt(Init); 104358b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 104458b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 104558b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 1046ad5a894df1841698c824381b414630799adc26caTed Kremenek 10474e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 10484e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 10494e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10504e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 105149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 1052d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 10536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 10546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 105549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 10566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 105700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1058941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal(true); 10591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 106000998a068e50945118f334c98af05ed44d7c22a6Mike Stump if (F->getCond()) 106100998a068e50945118f334c98af05ed44d7c22a6Mike Stump KnownVal = TryEvaluateBool(F->getCond()); 106200998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1063d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create the loop body. 1064d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 10656db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(F->getBody()); 10666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10673f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek // Save the current values for Block, Succ, and continue targets. 10683f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 10693f64a0e3be2c9408f8256bd3aa9f0ce9e268982cTed Kremenek save_continue(ContinueTargetBlock); 10706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1071af603f742491dc4707138c0293d295171fdd51baTed Kremenek // Create a new block to contain the (bottom) of the loop body. 1072af603f742491dc4707138c0293d295171fdd51baTed Kremenek Block = NULL; 10736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1074e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek if (Stmt* I = F->getInc()) { 10756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Generate increment code in its own basic block. This is the target of 10766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // continue statements. 10774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = addStmt(I); 10786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // No increment code. Create a special, empty, block that is used as the 10806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // target block for "looping back" to the start of the loop. 10813575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Succ == EntryConditionBlock); 10823575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Succ = createBlock(); 1083e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek } 10846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10853575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // Finish up the increment (or empty) block if it hasn't been already. 10863575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek if (Block) { 10873575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Block == Succ); 10884e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 10894e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10903575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Block = 0; 10913575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek } 10926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10933575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock = Succ; 10946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10953575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // The starting block for the loop increment is the block that should 10963575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // represent the 'loop target' for looping back to the start of the loop. 10973575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock->setLoopTarget(F); 10983575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek 10996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now populate the body block, and in the process create new blocks as we 11006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // walk the body of the loop. 11014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(F->getBody()); 1102af603f742491dc4707138c0293d295171fdd51baTed Kremenek 1103af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 11041d4b218fa55239f2a7350f48be14090d2753c22cZhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "for (...;...;...) ;" 1105941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek else if (Block && !FinishBlock(BodyBlock)) 1106941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return 0; 11076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1108941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // This new body block is a successor to our "exit" condition block. 1109ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1110d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 11116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1112941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1113941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1114ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 11156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1116d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If the loop contains initialization, create a new block for those 11176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statements. This block can also contain statements that precede the loop. 1118d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* I = F->getInit()) { 1119d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(); 112049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return addStmt(I); 11216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 11226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There is no loop initialization. We are thus basically a while loop. 11236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NULL out Block to force lazy block construction. 11242bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek Block = NULL; 11255482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 112649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 11272bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek } 1128d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1129d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1130115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted KremenekCFGBlock *CFGBuilder::VisitMemberExpr(MemberExpr *M, AddStmtChoice asc) { 1131115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek if (asc.alwaysAdd()) { 1132115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek autoCreateBlock(); 1133115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek AppendStmt(Block, M, asc); 1134115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek } 1135115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return Visit(M->getBase(), 1136115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek M->isArrow() ? AddStmtChoice::NotAlwaysAdd 1137115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AsLValueNotAlwaysAdd); 1138115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek} 1139115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 1140514de5a21645900c92cf4f4f7313d6f66945d134Ted KremenekCFGBlock* CFGBuilder::VisitObjCForCollectionStmt(ObjCForCollectionStmt* S) { 1141514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Objective-C fast enumeration 'for' statements: 1142514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC 1143514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1144514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( Type newVariable in collection_expression ) { statements } 1145514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1146514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1147514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1148514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // prologue: 1149514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. collection_expression 1150514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1151514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // loop_entry: 11524cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // 1. side-effects of element expression 1153514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. ObjCForCollectionStmt [performs binding to newVariable] 1154514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. ObjCForCollectionStmt TB, FB [jumps to TB if newVariable != nil] 1155514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // TB: 1156514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // statements 1157514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1158514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // FB: 1159514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // what comes after 1160514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1161514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // and 1162514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1163514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Type existingItem; 1164514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( existingItem in expression ) { statements } 1165514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1166514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1167514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same with newVariable replaced with existingItem; the binding works 11696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same except that for one ObjCForCollectionStmt::getElement() returns 11706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // a DeclStmt and the other returns a DeclRefExpr. 1171514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1173514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek CFGBlock* LoopSuccessor = 0; 11746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1175514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek if (Block) { 11764e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 11774e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1178514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek LoopSuccessor = Block; 1179514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek Block = 0; 11804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 11814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 11826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11834cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Build the condition blocks. 11844cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 11854cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 11866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11874cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Set the terminator for the "exit" condition block. 11886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(S); 11896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The last statement in the block should be the ObjCForCollectionStmt, which 11916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // performs the actual binding to 'element' and determines if there are any 11926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // more items in the collection. 1193ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(ExitConditionBlock, S); 11944cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = ExitConditionBlock; 11956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11964cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Walk the 'element' expression to see if there are any side-effects. We 11976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // generate new blocks as necesary. We DON'T add the statement by default to 11986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the CFG unless it contains control-flow. 1199852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek EntryConditionBlock = Visit(S->getElement(), AddStmtChoice::NotAlwaysAdd); 12006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 12014e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 12024e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 12034e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek Block = 0; 12044e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 12056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 12076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 12084cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Succ = EntryConditionBlock; 12096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12104cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Now create the true branch. 12116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump { 12124cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Save the current values for Succ, continue and break targets. 12134cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek SaveAndRestore<CFGBlock*> save_Succ(Succ), 12146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump save_continue(ContinueTargetBlock), save_break(BreakTargetBlock); 12156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12164cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BreakTargetBlock = LoopSuccessor; 12176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = EntryConditionBlock; 12186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(S->getBody()); 12206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12214cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek if (!BodyBlock) 12224cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BodyBlock = EntryConditionBlock; // can happen for "for (X in Y) ;" 12234e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 12244e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 12254e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 12264e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 12276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12284cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // This new body block is a successor to our "exit" condition block. 1229ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, BodyBlock); 12304cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek } 12316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12324cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Link up the condition block with the code that follows the loop. 12334cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // (the false branch). 1234ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, LoopSuccessor); 12354cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek 1236514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Now create a prologue block to contain the collection expression. 12374cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = createBlock(); 1238514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek return addStmt(S->getCollection()); 12396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 12406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1241b3b0b3624e462c2940f65b86e773bfc300005203Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt* S) { 1242b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // FIXME: Add locking 'primitives' to CFG for @synchronized. 12436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1244b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the body. 12454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *SyncBlock = addStmt(S->getSynchBody()); 12466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1247da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // The sync body starts its own basic block. This makes it a little easier 1248da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // for diagnostic clients. 1249da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek if (SyncBlock) { 1250da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek if (!FinishBlock(SyncBlock)) 1251da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek return 0; 12526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1253da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek Block = 0; 1254fadebbafe622752c3c6565b53ce8cd42bbbbd90cTed Kremenek Succ = SyncBlock; 1255da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek } 12566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1257b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the sync expression. 12584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(S->getSynchExpr()); 1259b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek} 12606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1261e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtTryStmt(ObjCAtTryStmt* S) { 12624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME 126390658ec72542df44eb462c69056184d2946bdbceTed Kremenek return NYS(); 1264e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted Kremenek} 1265514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek 1266d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitWhileStmt(WhileStmt* W) { 1267d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 12686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1269fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "while" is a control-flow statement. Thus we stop processing the current 1270fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 1271d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 12724e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 12734e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1274d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 12754f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 12764f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 12776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 12796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 12806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 128149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 128249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 12836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 128449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 128549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ExitConditionBlock->setTerminator(W); 12866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 12886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. Thus we update 12896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "Succ" after adding the condition. 129049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = W->getCond()) { 129149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 129249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 1293f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Block == EntryConditionBlock); 1294ad5a894df1841698c824381b414630799adc26caTed Kremenek 12954ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // If this block contains a condition variable, add both the condition 12964ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // variable and initializer to the CFG. 12974ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (VarDecl *VD = W->getConditionVariable()) { 12984ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (Expr *Init = VD->getInit()) { 12994ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek autoCreateBlock(); 13004ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek AppendStmt(Block, W, AddStmtChoice::AlwaysAdd); 13014ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek EntryConditionBlock = addStmt(Init); 13024ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek assert(Block == EntryConditionBlock); 13034ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 13044ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 13054ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek 13064e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 13074e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 13084e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 13094e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 131049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 13116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 13136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 131449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 13156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 131600998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1317941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(W->getCond()); 131800998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1319d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 1320d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 1321f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(W->getBody()); 1322d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1323d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1324d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 1325d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_continue(ContinueTargetBlock), 1326d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_break(BreakTargetBlock); 1327f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek 13286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block to represent the transition block for looping back 13296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to the head of the loop. 1330f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Block = 0; 1331f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Succ == EntryConditionBlock); 1332f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ = createBlock(); 1333f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ->setLoopTarget(W); 13346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = Succ; 13356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1336d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1337d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 13386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1339d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1340f752fcfae84fbf21b78383bf2461633382d51844Ted Kremenek Block = NULL; 13416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1342d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 13434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(W->getBody()); 13446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1345af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1346d5c3b1339e842619fc3ae79482424f901aeb89f3Zhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "while(...) ;" 13474e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 13484e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 13494e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 13504e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 13516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1352941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Add the loop body entry as a successor to the condition. 1353ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1354bf15b278a439d73b605ec00a8d3977ef305712f4Ted Kremenek } 13556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1356941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1357941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1358ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 13596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the condition block since we loop back 13616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to this block. NULL out Block to force lazy creation of another block. 1362d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 13636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13644ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // Return the condition block, which is the dominating block for the loop. 13655482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 136649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 1367d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 13681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13704f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitObjCAtCatchStmt(ObjCAtCatchStmt* S) { 13714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: For now we pretend that @catch and the code it contains does not 13724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // exit. 13734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 13744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 13756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13762fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtThrowStmt(ObjCAtThrowStmt* S) { 13772fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // FIXME: This isn't complete. We basically treat @throw like a return 13782fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // statement. 13796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13806c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 13814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 13824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 13836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13842fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // Create the new block. 13852fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek Block = createBlock(false); 13866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13872fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // The Exit block is the only successor. 1388ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 13896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the statement to the block. This may create new blocks if S contains 13916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow (short-circuit operations). 1392852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, AddStmtChoice::AlwaysAdd); 13932fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek} 1394989d52d469df0c202f7de82f54407066c7db2e63Ted Kremenek 13950979d80615df97c675423de631c1b884819f4712Mike StumpCFGBlock* CFGBuilder::VisitCXXThrowExpr(CXXThrowExpr* T) { 13966c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 13970979d80615df97c675423de631c1b884819f4712Mike Stump if (Block && !FinishBlock(Block)) 13980979d80615df97c675423de631c1b884819f4712Mike Stump return 0; 13990979d80615df97c675423de631c1b884819f4712Mike Stump 14000979d80615df97c675423de631c1b884819f4712Mike Stump // Create the new block. 14010979d80615df97c675423de631c1b884819f4712Mike Stump Block = createBlock(false); 14020979d80615df97c675423de631c1b884819f4712Mike Stump 14035d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (TryTerminatedBlock) 14045d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The current try statement is the only successor. 14055d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, TryTerminatedBlock); 1406ad5a894df1841698c824381b414630799adc26caTed Kremenek else 14075d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // otherwise the Exit block is the only successor. 14085d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, &cfg->getExit()); 14090979d80615df97c675423de631c1b884819f4712Mike Stump 14100979d80615df97c675423de631c1b884819f4712Mike Stump // Add the statement to the block. This may create new blocks if S contains 14110979d80615df97c675423de631c1b884819f4712Mike Stump // control-flow (short-circuit operations). 1412852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(T, AddStmtChoice::AlwaysAdd); 14130979d80615df97c675423de631c1b884819f4712Mike Stump} 14140979d80615df97c675423de631c1b884819f4712Mike Stump 14154f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDoStmt(DoStmt* D) { 1416d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 14176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14188f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // "do...while" is a control-flow statement. Thus we stop processing the 14198f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // current block. 1420d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 14214e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 14224e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1423d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 14244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 14254f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 14266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 14286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 14296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 143049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 143149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 14326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 143349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 14346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(D); 14356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 14376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 143849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = D->getCond()) { 143949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 144049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 14414e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 14424e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 14434e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14444e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 144549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 14466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14475482713d70ecbfe608940018046aa248b3d03443Ted Kremenek // The condition block is the implicit successor for the loop body. 144849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 144949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 145000998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1451941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(D->getCond()); 145200998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1453d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 145449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* BodyBlock = NULL; 1455d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 14566db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(D->getBody()); 14576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1458d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1459d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 14605d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_continue(ContinueTargetBlock), 14615d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_break(BreakTargetBlock); 14626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1463d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All continues within this loop should go to the condition block 146449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ContinueTargetBlock = EntryConditionBlock; 14656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1466d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1467d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 14686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1469d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1470b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek Block = NULL; 14716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1472d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 14734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BodyBlock = addStmt(D->getBody()); 14746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1475af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1476a9d996dbeb719200c4a9d86f68166a237583025fTed Kremenek BodyBlock = EntryConditionBlock; // can happen for "do ; while(...)" 14774e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 14784e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 14794e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14804e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 14816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1482d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek if (!KnownVal.isFalse()) { 1483d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // Add an intermediate block between the BodyBlock and the 1484d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // ExitConditionBlock to represent the "loop back" transition. Create an 1485d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // empty block to represent the transition block for looping back to the 1486d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // head of the loop. 1487d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // FIXME: Can we do this more efficiently without adding another block? 1488d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek Block = NULL; 1489d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek Succ = BodyBlock; 1490d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek CFGBlock *LoopBackBlock = createBlock(); 1491d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek LoopBackBlock->setLoopTarget(D); 1492d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek 1493d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek // Add the loop body entry as a successor to the condition. 1494d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek AddSuccessor(ExitConditionBlock, LoopBackBlock); 1495d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek } 1496d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek else 1497d173dc7825e999edab836f8215a82a96eae7c738Ted Kremenek AddSuccessor(ExitConditionBlock, NULL); 1498b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek } 14996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1500941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. 1501941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // (the false branch). 1502ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 15036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the body block(s) since we loop back to 15056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the body. NULL out Block to force lazy creation of another block. 1506d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 15076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1508d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Return the loop body, which is the dominating block for the loop. 15095482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = BodyBlock; 1510d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return BodyBlock; 1511d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1512d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1513d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitContinueStmt(ContinueStmt* C) { 1514d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // "continue" is a control-flow statement. Thus we stop processing the 1515d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // current block. 15164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 15174e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 15186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1519d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create a new block that ends with the continue statement. 1520d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 1521d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(C); 15226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1523d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If there is no target for the continue, then we are looking at an 1524235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek // incomplete AST. This means the CFG cannot be constructed. 1525235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek if (ContinueTargetBlock) 1526ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ContinueTargetBlock); 1527235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek else 1528235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek badCFG = true; 15296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1530d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return Block; 1531d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 153313fc08a323b29dd97a46def1e3a15bf082476efaTed KremenekCFGBlock *CFGBuilder::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, 1534852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 153513fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek 1536852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 153713fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1538ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, E); 153913fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // VLA types have expressions that must be evaluated. 15424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (E->isArgumentType()) { 15434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(E->getArgumentType().getTypePtr()); 15444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA != 0; VA = FindVA(VA->getElementType().getTypePtr())) 15454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(VA->getSizeExpr()); 15464e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 15471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 1549d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 15501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitStmtExpr - Utility method to handle (nested) statement 15524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// expressions (a GCC extension). 1553852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::VisitStmtExpr(StmtExpr *SE, AddStmtChoice asc) { 1554852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 155513fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1556ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, SE); 155713fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(SE->getSubStmt()); 15594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 1560d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1561411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitSwitchStmt(SwitchStmt* Terminator) { 15626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "switch" is a control-flow statement. Thus we stop processing the current 15636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 1564d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* SwitchSuccessor = NULL; 15656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1566d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 15674e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 15684e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1569d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchSuccessor = Block; 15706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else SwitchSuccessor = Succ; 1571d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1572d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current "switch" context. 1573d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_switch(SwitchTerminatedBlock), 1574eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_break(BreakTargetBlock), 1575eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_default(DefaultCaseBlock); 1576eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 15776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Set the "default" case to be the block after the switch statement. If the 15786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // switch statement contains a "default:", this value will be overwritten with 15796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the block for that code. 1580eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = SwitchSuccessor; 15816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1582d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create a new block that will contain the switch statement. 1583d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchTerminatedBlock = createBlock(false); 15846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1585d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now process the switch body. The code after the switch is the implicit 1586d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // successor. 1587d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = SwitchSuccessor; 1588d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = SwitchSuccessor; 15896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // When visiting the body, the case statements should automatically get linked 15916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // up to the switch. We also don't keep a pointer to the body, since all 15926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow from the switch goes to case/default statements. 15936db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getBody() && "switch must contain a non-NULL body"); 159449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; 15954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *BodyBlock = addStmt(Terminator->getBody()); 15964e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 15974e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 15984e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 15994e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 160049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 16016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we have no "default:" case, the default transition is to the code 16026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // following the switch body. 1603ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, DefaultCaseBlock); 16046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 160549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Add the terminator and condition in the switch block. 1606411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek SwitchTerminatedBlock->setTerminator(Terminator); 16076db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getCond() && "switch condition must be non-NULL"); 1608d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = SwitchTerminatedBlock; 16096b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek Block = addStmt(Terminator->getCond()); 1610ad5a894df1841698c824381b414630799adc26caTed Kremenek 16116b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // Finally, if the SwitchStmt contains a condition variable, add both the 16126b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // SwitchStmt and the condition variable initialization to the CFG. 16136b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (VarDecl *VD = Terminator->getConditionVariable()) { 16146b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (Expr *Init = VD->getInit()) { 16156b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek autoCreateBlock(); 16166b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek AppendStmt(Block, Terminator, AddStmtChoice::AlwaysAdd); 16176b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek addStmt(Init); 16186b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 16196b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 1620ad5a894df1841698c824381b414630799adc26caTed Kremenek 16216b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek return Block; 1622d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1623d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 16244f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock* CFGBuilder::VisitCaseStmt(CaseStmt* CS) { 16256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // CaseStmts are essentially labels, so they are the first statement in a 16266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 16270fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CFGBlock *TopBlock = 0, *LastBlock = 0; 16280fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16290fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (Stmt *Sub = CS->getSubStmt()) { 16300fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // For deeply nested chains of CaseStmts, instead of doing a recursion 16310fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // (which can blow out the stack), manually unroll and create blocks 16320fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // along the way. 16330fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek while (isa<CaseStmt>(Sub)) { 16340fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CFGBlock *CurrentBlock = createBlock(false); 16350fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CurrentBlock->setLabel(CS); 16360fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16370fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (TopBlock) 16380fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(LastBlock, CurrentBlock); 16390fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek else 16400fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek TopBlock = CurrentBlock; 16410fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16420fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(SwitchTerminatedBlock, CurrentBlock); 16430fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek LastBlock = CurrentBlock; 16440fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek 16450fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek CS = cast<CaseStmt>(Sub); 16460fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Sub = CS->getSubStmt(); 16470fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 164829ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek 16490fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek addStmt(Sub); 16500fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 165229ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek CFGBlock* CaseBlock = Block; 16534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!CaseBlock) 16544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock = createBlock(); 16556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Cases statements partition blocks, so this is the top of the basic block we 16576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // were processing (the "case XXX:" is the label). 16584f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock->setLabel(CS); 16594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 16604e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(CaseBlock)) 16614e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 16626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16636d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add this block to the list of successors for the block with the switch 16646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statement. 16654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(SwitchTerminatedBlock); 1666ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, CaseBlock); 16676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1668d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1669d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 16706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16710fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek if (TopBlock) { 16720fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek AddSuccessor(LastBlock, CaseBlock); 16730fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Succ = TopBlock; 16740fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16750fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek else { 16760fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek // This block is now the implicit successor of other blocks. 16770fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek Succ = CaseBlock; 16780fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek } 16796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16800fc67e2d619088945ac71e9d2590d5158650885dTed Kremenek return Succ; 1681d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 16826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1683411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitDefaultStmt(DefaultStmt* Terminator) { 16844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Terminator->getSubStmt()) 16854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(Terminator->getSubStmt()); 16861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1687eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = Block; 16884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 16894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!DefaultCaseBlock) 16904f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DefaultCaseBlock = createBlock(); 16916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Default statements partition blocks, so this is the top of the basic block 16936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // we were processing (the "default:" is the label). 1694411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek DefaultCaseBlock->setLabel(Terminator); 16951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16964e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(DefaultCaseBlock)) 16974e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1698eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 16996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Unlike case statements, we don't add the default block to the successors 17006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for the switch statement immediately. This is done when we finish 17016d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing the switch statement. This allows for the default case 17026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // (including a fall-through to the code after the switch statement) to always 17036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // be the last successor of a switch-terminated block. 17046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1705eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1706eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Block = NULL; 17076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1708eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // This block is now the implicit successor of other blocks. 1709eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Succ = DefaultCaseBlock; 17106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 17116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return DefaultCaseBlock; 1712295222c1f0926d84de77f076e79903523eeb5dbfTed Kremenek} 1713d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 17145d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock *CFGBuilder::VisitCXXTryStmt(CXXTryStmt *Terminator) { 17155d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // "try"/"catch" is a control-flow statement. Thus we stop processing the 17165d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // current block. 17175d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* TrySuccessor = NULL; 17185d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17195d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (Block) { 17205d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!FinishBlock(Block)) 17215d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17225d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump TrySuccessor = Block; 17235d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else TrySuccessor = Succ; 17245d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1725a1f93631a84621d77aeb627691da85a8991af188Mike Stump CFGBlock *PrevTryTerminatedBlock = TryTerminatedBlock; 17265d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17275d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Create a new block that will contain the try statement. 1728f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump CFGBlock *NewTryTerminatedBlock = createBlock(false); 17295d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add the terminator in the try block. 1730f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump NewTryTerminatedBlock->setTerminator(Terminator); 17315d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1732a1f93631a84621d77aeb627691da85a8991af188Mike Stump bool HasCatchAll = false; 17335d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump for (unsigned h = 0; h <Terminator->getNumHandlers(); ++h) { 17345d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 17355d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 17365d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CXXCatchStmt *CS = Terminator->getHandler(h); 1737a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl() == 0) { 1738a1f93631a84621d77aeb627691da85a8991af188Mike Stump HasCatchAll = true; 1739a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 17405d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17415d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock *CatchBlock = VisitCXXCatchStmt(CS); 17425d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CatchBlock == 0) 17435d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17445d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add this block to the list of successors for the block with the try 17455d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // statement. 1746f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, CatchBlock); 17475d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 1748a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (!HasCatchAll) { 1749a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (PrevTryTerminatedBlock) 1750f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, PrevTryTerminatedBlock); 1751a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 1752f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, &cfg->getExit()); 1753a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 17545d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17555d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 17565d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 17575d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1758f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump // Save the current "try" context. 1759f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump SaveAndRestore<CFGBlock*> save_try(TryTerminatedBlock); 1760f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump TryTerminatedBlock = NewTryTerminatedBlock; 1761f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump 17626db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getTryBlock() && "try must contain a non-NULL body"); 17635d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17643fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek Block = addStmt(Terminator->getTryBlock()); 17655d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return Block; 17665d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17675d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17685d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock* CFGBuilder::VisitCXXCatchStmt(CXXCatchStmt* CS) { 17695d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // CXXCatchStmt are treated like labels, so they are the first statement in a 17705d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // block. 17715d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17725d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CS->getHandlerBlock()) 17735d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump addStmt(CS->getHandlerBlock()); 17745d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17755d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* CatchBlock = Block; 17765d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!CatchBlock) 17775d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock = createBlock(); 17785d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17795d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock->setLabel(CS); 17805d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17815d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!FinishBlock(CatchBlock)) 17825d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17835d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17845d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary) 17855d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17875d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return CatchBlock; 17885d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17895d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1790ad5a894df1841698c824381b414630799adc26caTed KremenekCFGBlock *CFGBuilder::VisitCXXMemberCallExpr(CXXMemberCallExpr *C, 1791c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu AddStmtChoice asc) { 1792ad5a894df1841698c824381b414630799adc26caTed Kremenek AddStmtChoice::Kind K = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 179321f6d6ea71b89aeae6b9262c8cbdff7f6328e749Zhongxing Xu : AddStmtChoice::AlwaysAdd; 1794c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu autoCreateBlock(); 179521f6d6ea71b89aeae6b9262c8cbdff7f6328e749Zhongxing Xu AppendStmt(Block, C, AddStmtChoice(K)); 1796c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitChildren(C); 1797c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu} 1798c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 179919bb356317952445b03ee341c02f6147083c9eeaTed KremenekCFGBlock* CFGBuilder::VisitIndirectGotoStmt(IndirectGotoStmt* I) { 18006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Lazily create the indirect-goto dispatch block if there isn't one already. 180119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek CFGBlock* IBlock = cfg->getIndirectGotoBlock(); 18026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 180319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek if (!IBlock) { 180419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek IBlock = createBlock(false); 180519bb356317952445b03ee341c02f6147083c9eeaTed Kremenek cfg->setIndirectGotoBlock(IBlock); 180619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 18076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 180819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // IndirectGoto is a control-flow statement. Thus we stop processing the 180919bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // current block and create a new one. 18104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 18114f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 18124f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 181319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block = createBlock(false); 181419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block->setTerminator(I); 1815ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, IBlock); 181619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek return addStmt(I->getTarget()); 181719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek} 181819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 1819befef2f69759d7338e2b7c5ce6c8b6f47fe6e667Ted Kremenek} // end anonymous namespace 1820026473c2175424a039f51ca8949937268721b965Ted Kremenek 18216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// createBlock - Constructs and adds a new CFGBlock to the CFG. The block has 18226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// no successors or predecessors. If this is the first block created in the 18236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// CFG, it is automatically set to be the Entry and Exit of the CFG. 18249438252ad2ecae5338df565ca33c6969e4fbfa41Ted KremenekCFGBlock* CFG::createBlock() { 1825026473c2175424a039f51ca8949937268721b965Ted Kremenek bool first_block = begin() == end(); 1826026473c2175424a039f51ca8949937268721b965Ted Kremenek 1827026473c2175424a039f51ca8949937268721b965Ted Kremenek // Create the block. 1828ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek CFGBlock *Mem = getAllocator().Allocate<CFGBlock>(); 1829ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek new (Mem) CFGBlock(NumBlockIDs++, BlkBVC); 1830ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Blocks.push_back(Mem, BlkBVC); 1831026473c2175424a039f51ca8949937268721b965Ted Kremenek 1832026473c2175424a039f51ca8949937268721b965Ted Kremenek // If this is the first block, set it as the Entry and Exit. 1833ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (first_block) 1834ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Entry = Exit = &back(); 1835026473c2175424a039f51ca8949937268721b965Ted Kremenek 1836026473c2175424a039f51ca8949937268721b965Ted Kremenek // Return the block. 1837ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek return &back(); 1838026473c2175424a039f51ca8949937268721b965Ted Kremenek} 1839026473c2175424a039f51ca8949937268721b965Ted Kremenek 1840026473c2175424a039f51ca8949937268721b965Ted Kremenek/// buildCFG - Constructs a CFG from an AST. Ownership of the returned 1841026473c2175424a039f51ca8949937268721b965Ted Kremenek/// CFG is returned to the caller. 1842b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFG::buildCFG(const Decl *D, Stmt* Statement, ASTContext *C, 1843ad5a894df1841698c824381b414630799adc26caTed Kremenek bool PruneTriviallyFalse, 18444c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdges, bool AddScopes) { 1845fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBuilder Builder; 1846ad5a894df1841698c824381b414630799adc26caTed Kremenek return Builder.buildCFG(D, Statement, C, PruneTriviallyFalse, 1847ad5a894df1841698c824381b414630799adc26caTed Kremenek AddEHEdges, AddScopes); 1848fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek} 1849fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 185063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 185163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek// CFG: Queries for BlkExprs. 185263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 185363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 185463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremeneknamespace { 185586946745225096243f6969dc745267b78fc211a6Ted Kremenek typedef llvm::DenseMap<const Stmt*,unsigned> BlkExprMapTy; 185663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 185763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 18588a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenekstatic void FindSubExprAssignments(Stmt *S, 18598a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek llvm::SmallPtrSet<Expr*,50>& Set) { 18608a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!S) 186133d4aab80f31bd06257526fe2883ea920529456bTed Kremenek return; 18626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18638a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek for (Stmt::child_iterator I=S->child_begin(), E=S->child_end(); I!=E; ++I) { 1864ad5a894df1841698c824381b414630799adc26caTed Kremenek Stmt *child = *I; 18658a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!child) 18668a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek continue; 1867ad5a894df1841698c824381b414630799adc26caTed Kremenek 18688a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(child)) 186933d4aab80f31bd06257526fe2883ea920529456bTed Kremenek if (B->isAssignmentOp()) Set.insert(B); 18706d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18718a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek FindSubExprAssignments(child, Set); 187233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 187333d4aab80f31bd06257526fe2883ea920529456bTed Kremenek} 187433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek 187563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekstatic BlkExprMapTy* PopulateBlkExprMap(CFG& cfg) { 187663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = new BlkExprMapTy(); 18776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Look for assignments that are used as subexpressions. These are the only 18796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // assignments that we want to *possibly* register as a block-level 18806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression. Basically, if an assignment occurs both in a subexpression and 18816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // at the block-level, it is a block-level expression. 188233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek llvm::SmallPtrSet<Expr*,50> SubExprAssignments; 18836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 188463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) 1885ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 188633d4aab80f31bd06257526fe2883ea920529456bTed Kremenek FindSubExprAssignments(*BI, SubExprAssignments); 188786946745225096243f6969dc745267b78fc211a6Ted Kremenek 1888411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) { 18896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Iterate over the statements again on identify the Expr* and Stmt* at the 18916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block-level that are block-level expressions. 1892411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 1893ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 1894411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (Expr* Exp = dyn_cast<Expr>(*BI)) { 18956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1896411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(Exp)) { 189733d4aab80f31bd06257526fe2883ea920529456bTed Kremenek // Assignment expressions that are not nested within another 18986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression are really "statements" whose value is never used by 18996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // another expression. 1900411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (B->isAssignmentOp() && !SubExprAssignments.count(Exp)) 190133d4aab80f31bd06257526fe2883ea920529456bTed Kremenek continue; 19026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (const StmtExpr* Terminator = dyn_cast<StmtExpr>(Exp)) { 19036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Special handling for statement expressions. The last statement in 19046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the statement expression is also a block-level expr. 1905411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek const CompoundStmt* C = Terminator->getSubStmt(); 190686946745225096243f6969dc745267b78fc211a6Ted Kremenek if (!C->body_empty()) { 190733d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 190886946745225096243f6969dc745267b78fc211a6Ted Kremenek (*M)[C->body_back()] = x; 190986946745225096243f6969dc745267b78fc211a6Ted Kremenek } 191086946745225096243f6969dc745267b78fc211a6Ted Kremenek } 1911e2dcd783a04f654c50bd8b13fb08a440afbd67e7Ted Kremenek 191233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 1913411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek (*M)[Exp] = x; 191433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 19156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1916411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek // Look at terminators. The condition is a block-level expression. 19176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1918ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Stmt* S = (*I)->getTerminatorCondition(); 19196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1920390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek if (S && M->find(S) == M->end()) { 1921411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek unsigned x = M->size(); 1922390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek (*M)[S] = x; 1923411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 1924411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 19256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 192686946745225096243f6969dc745267b78fc211a6Ted Kremenek return M; 192763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 192863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 192986946745225096243f6969dc745267b78fc211a6Ted KremenekCFG::BlkExprNumTy CFG::getBlkExprNum(const Stmt* S) { 193086946745225096243f6969dc745267b78fc211a6Ted Kremenek assert(S != NULL); 193163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (!BlkExprMap) { BlkExprMap = (void*) PopulateBlkExprMap(*this); } 19326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 193363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = reinterpret_cast<BlkExprMapTy*>(BlkExprMap); 193486946745225096243f6969dc745267b78fc211a6Ted Kremenek BlkExprMapTy::iterator I = M->find(S); 19353fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek return (I == M->end()) ? CFG::BlkExprNumTy() : CFG::BlkExprNumTy(I->second); 193663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 19377dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 193863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekunsigned CFG::getNumBlkExprs() { 193963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (const BlkExprMapTy* M = reinterpret_cast<const BlkExprMapTy*>(BlkExprMap)) 194063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return M->size(); 194163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek else { 194263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // We assume callers interested in the number of BlkExprs will want 194363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // the map constructed if it doesn't already exist. 194463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMap = (void*) PopulateBlkExprMap(*this); 194563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return reinterpret_cast<BlkExprMapTy*>(BlkExprMap)->size(); 194663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek } 194763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 194863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 1949274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1950274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek// Cleanup: CFG dstor. 1951274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1952274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek 195363f5887f316fb52d243fcbb3631c039de6c4b993Ted KremenekCFG::~CFG() { 195463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek delete reinterpret_cast<const BlkExprMapTy*>(BlkExprMap); 195563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 19566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19577dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 19587dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG pretty printing 19597dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 19607dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 196142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremeneknamespace { 19622bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek 1963ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass StmtPrinterHelper : public PrinterHelper { 196442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek typedef llvm::DenseMap<Stmt*,std::pair<unsigned,unsigned> > StmtMapTy; 196542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtMapTy StmtMap; 196642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek signed CurrentBlock; 196742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned CurrentStmt; 1968e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LangOpts; 196942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenekpublic: 19701c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek 1971e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper(const CFG* cfg, const LangOptions &LO) 1972e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner : CurrentBlock(0), CurrentStmt(0), LangOpts(LO) { 197342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFG::const_iterator I = cfg->begin(), E = cfg->end(); I != E; ++I ) { 197442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned j = 1; 1975ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::const_iterator BI = (*I)->begin(), BEnd = (*I)->end() ; 197642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek BI != BEnd; ++BI, ++j ) 1977ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek StmtMap[*BI] = std::make_pair((*I)->getBlockID(),j); 197842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 1979fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 19806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 198142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek virtual ~StmtPrinterHelper() {} 19826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1983e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &getLangOpts() const { return LangOpts; } 198442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setBlockID(signed i) { CurrentBlock = i; } 198542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setStmtID(unsigned i) { CurrentStmt = i; } 19866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1987a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek virtual bool handledStmt(Stmt* Terminator, llvm::raw_ostream& OS) { 19886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1989411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek StmtMapTy::iterator I = StmtMap.find(Terminator); 1990fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 199142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (I == StmtMap.end()) 199242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (CurrentBlock >= 0 && I->second.first == (unsigned) CurrentBlock 19953fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek && I->second.second == CurrentStmt) { 199642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19973fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek } 19986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19993fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "[B" << I->second.first << "." << I->second.second << "]"; 20001c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return true; 200142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 200242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek}; 2003e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 2004e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 2005e8ee26b49d68ae3ffdf9a990ff7511ef55afa04cTed Kremenek 2006e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnernamespace { 2007ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass CFGBlockTerminatorPrint 20086fa9b88e2c3d47d606a273df2f8d03509bcff0b9Ted Kremenek : public StmtVisitor<CFGBlockTerminatorPrint,void> { 20096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2010a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_ostream& OS; 201142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtPrinterHelper* Helper; 2012d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor PrintingPolicy Policy; 2013d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenekpublic: 2014d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor CFGBlockTerminatorPrint(llvm::raw_ostream& os, StmtPrinterHelper* helper, 2015e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const PrintingPolicy &Policy) 2016d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor : OS(os), Helper(helper), Policy(Policy) {} 20176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2018d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitIfStmt(IfStmt* I) { 2019d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "if "; 2020d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getCond()->printPretty(OS,Helper,Policy); 2021d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2023d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Default case. 20246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump void VisitStmt(Stmt* Terminator) { 20256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Terminator->printPretty(OS, Helper, Policy); 20266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 20276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2028d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitForStmt(ForStmt* F) { 2029d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "for (" ; 20303fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInit()) 20313fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 2032535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 20333fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = F->getCond()) 20343fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 2035535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 20363fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInc()) 20373fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 2038a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << ")"; 2039d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2041d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitWhileStmt(WhileStmt* W) { 2042d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "while " ; 20433fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = W->getCond()) 20443fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 2045d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 20466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2047d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitDoStmt(DoStmt* D) { 2048d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "do ... while "; 20493fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = D->getCond()) 20503fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 20519da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 20526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2053411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek void VisitSwitchStmt(SwitchStmt* Terminator) { 20549da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek OS << "switch "; 2055d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor Terminator->getCond()->printPretty(OS, Helper, Policy); 20569da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 20576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20585d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump void VisitCXXTryStmt(CXXTryStmt* CS) { 20595d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "try ..."; 20605d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 20615d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 2062805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitConditionalOperator(ConditionalOperator* C) { 2063d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 20646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << " ? ... : ..."; 2065805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2067aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek void VisitChooseExpr(ChooseExpr* C) { 2068aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek OS << "__builtin_choose_expr( "; 2069d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 2070a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " )"; 2071aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek } 20726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20731c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek void VisitIndirectGotoStmt(IndirectGotoStmt* I) { 20741c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "goto *"; 2075d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getTarget()->printPretty(OS, Helper, Policy); 20761c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2078805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitBinaryOperator(BinaryOperator* B) { 2079805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek if (!B->isLogicalOp()) { 2080805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek VisitExpr(B); 2081805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2082805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2084d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor B->getLHS()->printPretty(OS, Helper, Policy); 20856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2086805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek switch (B->getOpcode()) { 2087805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek case BinaryOperator::LOr: 2088a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " || ..."; 2089805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2090805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek case BinaryOperator::LAnd: 2091a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " && ..."; 2092805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2093805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek default: 2094805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek assert(false && "Invalid logical operator."); 20956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2096805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20980b1d9b7557437176f9cea1283bfac2510812beceTed Kremenek void VisitExpr(Expr* E) { 2099d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor E->printPretty(OS, Helper, Policy); 21006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2101d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2102e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 2103e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 21046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2105e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_stmt(llvm::raw_ostream &OS, StmtPrinterHelper* Helper, 2106079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump const CFGElement &E) { 2107079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Stmt *Terminator = E; 2108079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 2109079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (E.asStartScope()) { 2110079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump OS << "start scope\n"; 2111079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return; 2112079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 2113079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (E.asEndScope()) { 2114079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump OS << "end scope\n"; 2115079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return; 2116079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 2117079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 21181c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Helper) { 21191c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for statement-expressions. 2120411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (StmtExpr* SE = dyn_cast<StmtExpr>(Terminator)) { 21211c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek CompoundStmt* Sub = SE->getSubStmt(); 21226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21231c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Sub->child_begin() != Sub->child_end()) { 212460266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << "({ ... ; "; 21257a9d9d71fa208dc23fd67d03ce052d4ef60a8d04Ted Kremenek Helper->handledStmt(*SE->getSubStmt()->body_rbegin(),OS); 212660266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << " })\n"; 21271c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 21281c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21291c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21311c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for comma expressions. 2132411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(Terminator)) { 21331c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (B->getOpcode() == BinaryOperator::Comma) { 21341c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "... , "; 21351c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek Helper->handledStmt(B->getRHS(),OS); 21361c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << '\n'; 21371c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 21386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 21396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 21401c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 21416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2142e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner Terminator->printPretty(OS, Helper, PrintingPolicy(Helper->getLangOpts())); 21436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21441c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // Expressions need a newline. 2145411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (isa<Expr>(Terminator)) OS << '\n'; 21461c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek} 21476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2148e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_block(llvm::raw_ostream& OS, const CFG* cfg, 2149e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const CFGBlock& B, 2150e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper* Helper, bool print_edges) { 21516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 215242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(B.getBlockID()); 21536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21547dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Print the header. 21556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << "\n [ B" << B.getBlockID(); 21566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 215742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (&B == &cfg->getEntry()) 215842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (ENTRY) ]\n"; 215942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == &cfg->getExit()) 216042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (EXIT) ]\n"; 216142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == cfg->getIndirectGotoBlock()) 21627dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OS << " (INDIRECT GOTO DISPATCH) ]\n"; 216342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else 216442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " ]\n"; 21656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21669cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the label of this block. 2167079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Stmt* Label = const_cast<Stmt*>(B.getLabel())) { 216842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 216942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 217042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 21716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2172079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (LabelStmt* L = dyn_cast<LabelStmt>(Label)) 21739cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << L->getName(); 2174079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 21759cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "case "; 2176e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(OS, Helper, 2177e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21789cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (C->getRHS()) { 21799cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " ... "; 2180e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getRHS()->printPretty(OS, Helper, 2181e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21829cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 2183079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } else if (isa<DefaultStmt>(Label)) 21849cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "default"; 2185079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CXXCatchStmt *CS = dyn_cast<CXXCatchStmt>(Label)) { 21865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "catch ("; 2187a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl()) 2188a1f93631a84621d77aeb627691da85a8991af188Mike Stump CS->getExceptionDecl()->print(OS, PrintingPolicy(Helper->getLangOpts()), 2189a1f93631a84621d77aeb627691da85a8991af188Mike Stump 0); 2190a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 2191a1f93631a84621d77aeb627691da85a8991af188Mike Stump OS << "..."; 21925d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << ")"; 21935d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 21945d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else 219542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek assert(false && "Invalid label statement in CFGBlock."); 21966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21979cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << ":\n"; 21989cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 21996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2200fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // Iterate through the statements in the block and print them. 2201fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned j = 1; 22026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 220342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_iterator I = B.begin(), E = B.end() ; 220442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E ; ++I, ++j ) { 22056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22069cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the statement # in the basic block and the statement itself. 220742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 220842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 22096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2210a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek OS << llvm::format("%3d", j) << ": "; 22116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 221242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) 221342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek Helper->setStmtID(j); 22146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22151c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek print_stmt(OS,Helper,*I); 2216fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22189cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the terminator of this block. 221942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (B.getTerminator()) { 222042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 222142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 22226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22239cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " T: "; 22246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 222542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(-1); 22266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2227e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, Helper, 2228e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 222942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek TPrinter.Visit(const_cast<Stmt*>(B.getTerminator())); 2230a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << '\n'; 2231fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22339cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (print_edges) { 22349cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the predecessors of this block. 223542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Predecessors (" << B.pred_size() << "):"; 22369cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek unsigned i = 0; 223742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 223842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_pred_iterator I = B.pred_begin(), E = B.pred_end(); 223942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 22406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 224142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) == 0) 22429cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 22436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22449cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " B" << (*I)->getBlockID(); 22459cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 22466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22479cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 22486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22499cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the successors of this block. 225042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Successors (" << B.succ_size() << "):"; 22519cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek i = 0; 225242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 225342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_succ_iterator I = B.succ_begin(), E = B.succ_end(); 225442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 22556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 225642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) % 10 == 0) 22579cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 225842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2259e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (*I) 2260e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " B" << (*I)->getBlockID(); 2261e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump else 2262e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " NULL"; 2263fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22659cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 2266fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 22676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 226842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 226942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 227042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simple pretty printer of a CFG that outputs to stderr. 2271e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::dump(const LangOptions &LO) const { print(llvm::errs(), LO); } 227242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 227342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFG that outputs to an ostream. 2274e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::print(llvm::raw_ostream &OS, const LangOptions &LO) const { 2275e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(this, LO); 22766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 227742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the entry block. 227842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getEntry(), &Helper, true); 22796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 228042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Iterate through the CFGBlocks and print them one by one. 228142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (const_iterator I = Blocks.begin(), E = Blocks.end() ; I != E ; ++I) { 228242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Skip the entry block, because we already printed it. 2283ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (&(**I) == &getEntry() || &(**I) == &getExit()) 228442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek continue; 22856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2286ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek print_block(OS, this, **I, &Helper, true); 228742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 22886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 228942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the exit block. 229042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getExit(), &Helper, true); 2291d0172439194b28bae62a94a0a25d58e6d21e7a14Ted Kremenek OS.flush(); 22926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 229342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 229442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simply pretty printer of a CFGBlock that outputs to stderr. 2295e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::dump(const CFG* cfg, const LangOptions &LO) const { 2296e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner print(llvm::errs(), cfg, LO); 2297e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} 229842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 229942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFGBlock that outputs to an ostream. 230042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// Generally this will only be called from CFG::print. 2301e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::print(llvm::raw_ostream& OS, const CFG* cfg, 2302e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LO) const { 2303e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(cfg, LO); 230442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, cfg, *this, &Helper, true); 2305026473c2175424a039f51ca8949937268721b965Ted Kremenek} 23067dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2307a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek/// printTerminator - A simple pretty printer of the terminator of a CFGBlock. 2308e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::printTerminator(llvm::raw_ostream &OS, 23096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump const LangOptions &LO) const { 2310e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, NULL, PrintingPolicy(LO)); 2311a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek TPrinter.Visit(const_cast<Stmt*>(getTerminator())); 2312a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek} 2313a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 2314390e48b15ad93f85bfd1e33b9992c198fa0db475Ted KremenekStmt* CFGBlock::getTerminatorCondition() { 23156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2316411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (!Terminator) 2317411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return NULL; 23186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2319411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek Expr* E = NULL; 23206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2321411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek switch (Terminator->getStmtClass()) { 2322411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek default: 2323411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2325411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ForStmtClass: 2326411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ForStmt>(Terminator)->getCond(); 2327411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2329411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::WhileStmtClass: 2330411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<WhileStmt>(Terminator)->getCond(); 2331411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2333411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::DoStmtClass: 2334411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<DoStmt>(Terminator)->getCond(); 2335411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2337411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IfStmtClass: 2338411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IfStmt>(Terminator)->getCond(); 2339411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2341411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ChooseExprClass: 2342411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ChooseExpr>(Terminator)->getCond(); 2343411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2345411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IndirectGotoStmtClass: 2346411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IndirectGotoStmt>(Terminator)->getTarget(); 2347411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2349411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::SwitchStmtClass: 2350411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<SwitchStmt>(Terminator)->getCond(); 2351411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2353411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ConditionalOperatorClass: 2354411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ConditionalOperator>(Terminator)->getCond(); 2355411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 23566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2357411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::BinaryOperatorClass: // '&&' and '||' 2358411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<BinaryOperator>(Terminator)->getLHS(); 2359390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek break; 23606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2361390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 23626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Terminator; 2363411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 23646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2365411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return E ? E->IgnoreParens() : NULL; 2366411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek} 2367411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 23689c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenekbool CFGBlock::hasBinaryBranchTerminator() const { 23696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23709c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek if (!Terminator) 23719c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23739c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek Expr* E = NULL; 23746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23759c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek switch (Terminator->getStmtClass()) { 23769c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek default: 23779c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump case Stmt::ForStmtClass: 23809c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::WhileStmtClass: 23819c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::DoStmtClass: 23829c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::IfStmtClass: 23839c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ChooseExprClass: 23849c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ConditionalOperatorClass: 23859c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::BinaryOperatorClass: 23866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return true; 23879c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek } 23886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23899c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return E ? E->IgnoreParens() : NULL; 23909c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek} 23919c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek 2392a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 23937dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23947dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG Graphviz Visualization 23957dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23967dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 239742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 239842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 23996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumpstatic StmtPrinterHelper* GraphHelper; 240042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 240142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2402e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::viewCFG(const LangOptions &LO) const { 240342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 2404e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper H(this, LO); 240542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = &H; 240642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek llvm::ViewGraph(this,"CFG"); 240742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = NULL; 240842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 240942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek} 241042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 24117dba8607e59096014b7139ff20ef00870041d518Ted Kremeneknamespace llvm { 24127dba8607e59096014b7139ff20ef00870041d518Ted Kremenektemplate<> 24137dba8607e59096014b7139ff20ef00870041d518Ted Kremenekstruct DOTGraphTraits<const CFG*> : public DefaultDOTGraphTraits { 2414006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2415006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 2416006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2417006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const CFGBlock* Node, const CFG* Graph) { 24187dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2419bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#ifndef NDEBUG 2420a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string OutSStr; 2421a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_string_ostream Out(OutSStr); 242242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(Out,Graph, *Node, GraphHelper, false); 2423a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string& OutStr = Out.str(); 24247dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 24257dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); 24267dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 24277dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Process string output to make it nicer... 24287dba8607e59096014b7139ff20ef00870041d518Ted Kremenek for (unsigned i = 0; i != OutStr.length(); ++i) 24297dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[i] == '\n') { // Left justify 24307dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr[i] = '\\'; 24317dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr.insert(OutStr.begin()+i+1, 'l'); 24327dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 24336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 24347dba8607e59096014b7139ff20ef00870041d518Ted Kremenek return OutStr; 2435bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#else 2436bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser return ""; 2437bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#endif 24387dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 24397dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 24407dba8607e59096014b7139ff20ef00870041d518Ted Kremenek} // end namespace llvm 2441