CFG.cpp revision c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01
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} 38852274d4257134906995cb252fb3dfd2d71deae8Ted 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. 1024c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump CFG* buildCFG(const Decl *D, Stmt *Statement, ASTContext *C, bool AddEHEdges, 1034c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddScopes); 1046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenekprivate: 1064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Visitors to walk an AST and construct the CFG. 107852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitAddrLabelExpr(AddrLabelExpr *A, AddStmtChoice asc); 108852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBinaryOperator(BinaryOperator *B, AddStmtChoice asc); 109852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitBlockExpr(BlockExpr* E, AddStmtChoice asc); 1104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitBreakStmt(BreakStmt *B); 1117ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXCatchStmt(CXXCatchStmt *S); 1127ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXThrowExpr(CXXThrowExpr *T); 1137ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitCXXTryStmt(CXXTryStmt *S); 114c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu CFGBlock *VisitCXXMemberCallExpr(CXXMemberCallExpr *C, AddStmtChoice asc); 115852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitCallExpr(CallExpr *C, AddStmtChoice asc); 1164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitCaseStmt(CaseStmt *C); 117852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitChooseExpr(ChooseExpr *C, AddStmtChoice asc); 1183fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitCompoundStmt(CompoundStmt *C); 1197ea2136685403045f91b3a8b83e34c51ac0e082eTed Kremenek CFGBlock *VisitConditionalOperator(ConditionalOperator *C, AddStmtChoice asc); 1203fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitContinueStmt(ContinueStmt *C); 1214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclStmt(DeclStmt *DS); 1224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitDeclSubExpr(Decl* D); 1233fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDefaultStmt(DefaultStmt *D); 1243fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitDoStmt(DoStmt *D); 1253fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock *VisitForStmt(ForStmt *F); 1264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitGotoStmt(GotoStmt* G); 1274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIfStmt(IfStmt *I); 1284f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitIndirectGotoStmt(IndirectGotoStmt *I); 1294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitLabelStmt(LabelStmt *L); 130115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock *VisitMemberExpr(MemberExpr *M, AddStmtChoice asc); 1314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtCatchStmt(ObjCAtCatchStmt *S); 1324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S); 1334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtThrowStmt(ObjCAtThrowStmt *S); 1344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCAtTryStmt(ObjCAtTryStmt *S); 1354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitObjCForCollectionStmt(ObjCForCollectionStmt *S); 1364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitReturnStmt(ReturnStmt* R); 137852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, AddStmtChoice asc); 138852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmtExpr(StmtExpr *S, AddStmtChoice asc); 1394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitSwitchStmt(SwitchStmt *S); 1404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitWhileStmt(WhileStmt *W); 1414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 142852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *Visit(Stmt *S, AddStmtChoice asc = AddStmtChoice::NotAlwaysAdd); 143852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *VisitStmt(Stmt *S, AddStmtChoice asc); 1444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *VisitChildren(Stmt* S); 145cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 146274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek // NYS == Not Yet Supported 147274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek CFGBlock* NYS() { 1484102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = true; 1494102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek return Block; 1504102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek } 1516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 152079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump CFGBlock *StartScope(Stmt *S, CFGBlock *B) { 153079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (!AddScopes) 154079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return B; 155079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 156079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (B == 0) 157079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump B = createBlock(); 158079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump B->StartScope(S, cfg->getBumpVectorContext()); 159079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return B; 160079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 161079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 162079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump void EndScope(Stmt *S) { 163079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (!AddScopes) 164079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return; 165079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 166079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Block == 0) 167079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block = createBlock(); 168079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block->EndScope(S, cfg->getBumpVectorContext()); 169079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 170079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 1714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek void autoCreateBlock() { if (!Block) Block = createBlock(); } 1724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *createBlock(bool add_successor = true); 1734e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek bool FinishBlock(CFGBlock* B); 174852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek CFGBlock *addStmt(Stmt *S, AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { 175852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return Visit(S, asc); 176852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek } 177ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek 178852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek void AppendStmt(CFGBlock *B, Stmt *S, 179852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { 180852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek B->appendStmt(S, cfg->getBumpVectorContext(), asc.asLValue()); 181ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 182ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek 183ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek void AddSuccessor(CFGBlock *B, CFGBlock *S) { 184ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek B->addSuccessor(S, cfg->getBumpVectorContext()); 185ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek } 1861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 187fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// TryResult - a class representing a variant over the values 188fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// 'true', 'false', or 'unknown'. This is returned by TryEvaluateBool, 189fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// and is used by the CFGBuilder to decide if a branch condition 190fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek /// can be decided up front during CFG construction. 191941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek class TryResult { 192941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek int X; 193941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek public: 194941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult(bool b) : X(b ? 1 : 0) {} 195941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult() : X(-1) {} 1961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 197941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isTrue() const { return X == 1; } 198941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isFalse() const { return X == 0; } 199941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek bool isKnown() const { return X >= 0; } 200941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek void negate() { 201941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(isKnown()); 202941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek X ^= 0x1; 203941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek } 204941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek }; 2051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20600998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// TryEvaluateBool - Try and evaluate the Stmt and return 0 or 1 20700998a068e50945118f334c98af05ed44d7c22a6Mike Stump /// if we can evaluate to a known value, otherwise return -1. 208941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult TryEvaluateBool(Expr *S) { 20900998a068e50945118f334c98af05ed44d7c22a6Mike Stump Expr::EvalResult Result; 2109983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor if (!S->isTypeDependent() && !S->isValueDependent() && 2119983cc110422a2e976191a0ce6ac4f1d7b634cc0Douglas Gregor S->Evaluate(Result, *Context) && Result.Val.isInt()) 212fadc9eaeac18b470b6dfcf9efcf5c4f8caea89bcTed Kremenek return Result.Val.getInt().getBoolValue(); 213941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek 214941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return TryResult(); 21500998a068e50945118f334c98af05ed44d7c22a6Mike Stump } 21600998a068e50945118f334c98af05ed44d7c22a6Mike Stump 2174102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek bool badCFG; 2184c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 2194c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump // True iff EH edges on CallExprs should be added to the CFG. 2204c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdges; 2214c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 2224c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump // True iff scope start and scope end notes should be added to the CFG. 223079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump bool AddScopes; 224d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 226898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// FIXME: Add support for dependent-sized array types in C++? 227898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor// Does it even make sense to build a CFG for an uninstantiated template? 228610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenekstatic VariableArrayType* FindVA(Type* t) { 229610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek while (ArrayType* vt = dyn_cast<ArrayType>(t)) { 230610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt)) 231610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek if (vat->getSizeExpr()) 232610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return vat; 2336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 234610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek t = vt->getElementType().getTypePtr(); 235610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek } 2366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 237610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek return 0; 238610a09e409bea151a42dd907768f1e0c4b103f1fTed Kremenek} 2396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// BuildCFG - Constructs a CFG from an AST (a Stmt*). The AST can represent an 2416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// arbitrary statement. Examples include a single expression or a function 2426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// body (compound statement). The ownership of the returned CFG is 2436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// transferred to the caller. If CFG construction fails, this method returns 2446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// NULL. 245b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFGBuilder::buildCFG(const Decl *D, Stmt* Statement, ASTContext* C, 24655f988efeb08b84c2dd9e4c05990b88c81fe2b58Mike Stump bool addehedges, bool AddScopes) { 24755f988efeb08b84c2dd9e4c05990b88c81fe2b58Mike Stump AddEHEdges = addehedges; 248e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump Context = C; 2490ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek assert(cfg.get()); 2504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!Statement) 2514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return NULL; 252d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 253079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump this->AddScopes = AddScopes; 2544102af916d52310c3deedd84d6fd5e2fd3c09bfeTed Kremenek badCFG = false; 2556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block that will serve as the exit block for the CFG. Since 2576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // this is the first block added to the CFG, it will be implicitly registered 2586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // as the exit block. 25949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = createBlock(); 260ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek assert(Succ == &cfg->getExit()); 26149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; // the EXIT block is empty. Create all other blocks lazily. 2626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 263d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Visit the statements and create the CFG. 2644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* B = addStmt(Statement); 265b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump 266b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump if (const CXXConstructorDecl *CD = dyn_cast_or_null<CXXConstructorDecl>(D)) { 267b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump // FIXME: Add code for base initializers and member initializers. 268b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump (void)CD; 269b978a441c7d8bf59e7fede938e1f3b672573b443Mike Stump } 2700ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek if (!B) 2710ba497be27170c2a23c0217366f97eeecefa1ed8Ted Kremenek B = Succ; 2726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 273c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (B) { 274c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Finalize the last constructed block. This usually involves reversing the 275c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // order of the statements in the block. 276c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (Block) FinishBlock(B); 277c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar 278c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Backpatch the gotos whose label -> block mappings we didn't know when we 279c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // encountered them. 280c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar for (BackpatchBlocksTy::iterator I = BackpatchBlocks.begin(), 281d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek E = BackpatchBlocks.end(); I != E; ++I ) { 2826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 283c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar CFGBlock* B = *I; 284c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar GotoStmt* G = cast<GotoStmt>(B->getTerminator()); 285c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar LabelMapTy::iterator LI = LabelMap.find(G->getLabel()); 286d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 287c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // If there is no target for the goto, then we are looking at an 288c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // incomplete AST. Handle this by not registering a successor. 289c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (LI == LabelMap.end()) continue; 2906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 291c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar AddSuccessor(B, LI->second); 292c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 2936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 294c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Add successors to the Indirect Goto Dispatch block (if we have one). 295c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (CFGBlock* B = cfg->getIndirectGotoBlock()) 296c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar for (LabelSetTy::iterator I = AddressTakenLabels.begin(), 29719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek E = AddressTakenLabels.end(); I != E; ++I ) { 29819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 299c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // Lookup the target block. 300c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar LabelMapTy::iterator LI = LabelMap.find(*I); 30119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 302c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // If there is no target block that contains label, then we are looking 303c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar // at an incomplete AST. Handle this by not registering a successor. 304c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar if (LI == LabelMap.end()) continue; 3056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 306c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar AddSuccessor(B, LI->second); 307c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 3086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 309c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar Succ = B; 310c3daac59e26b63c08208de2fbaceb1ff01be3492Daniel Dunbar } 3116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 3126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty entry block that has no predecessors. 313322f58d3830da13b419646c071e3ab801518a09cTed Kremenek cfg->setEntry(createBlock()); 3146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 315da9b30ea415af1de659524c28793e2597342f6e8Ted Kremenek return badCFG ? NULL : cfg.take(); 316d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 318d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// createBlock - Used to lazily create blocks that are connected 319d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek/// to the current (global) succcessor. 3206d9828c82c9321f042ab416fd2ffaa3034347d45Mike StumpCFGBlock* CFGBuilder::createBlock(bool add_successor) { 3219438252ad2ecae5338df565ca33c6969e4fbfa41Ted Kremenek CFGBlock* B = cfg->createBlock(); 3224f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (add_successor && Succ) 323ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(B, Succ); 324d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return B; 325d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 3266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 3276c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek/// FinishBlock - "Finalize" the block by checking if we have a bad CFG. 3284e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenekbool CFGBuilder::FinishBlock(CFGBlock* B) { 3294e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (badCFG) 3304e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return false; 3314e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek 3324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(B); 3334e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return true; 334d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 335d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 3364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// Visit - Walk the subtree of a statement and add extra 3376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// blocks for ternary operators, &&, and ||. We also process "," and 3386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// DeclStmts (which may contain nested control-flow). 339852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::Visit(Stmt * S, AddStmtChoice asc) { 3404f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenektryAgain: 3414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek switch (S->getStmtClass()) { 3424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek default: 343852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, asc); 3444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::AddrLabelExprClass: 346852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitAddrLabelExpr(cast<AddrLabelExpr>(S), asc); 3471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BinaryOperatorClass: 349852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBinaryOperator(cast<BinaryOperator>(S), asc); 3501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BlockExprClass: 352852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitBlockExpr(cast<BlockExpr>(S), asc); 3534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3544f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::BreakStmtClass: 3554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitBreakStmt(cast<BreakStmt>(S)); 3561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CallExprClass: 358852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitCallExpr(cast<CallExpr>(S), asc); 3591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CaseStmtClass: 3614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCaseStmt(cast<CaseStmt>(S)); 3624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 3634f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ChooseExprClass: 364852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitChooseExpr(cast<ChooseExpr>(S), asc); 3651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::CompoundStmtClass: 3674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(cast<CompoundStmt>(S)); 3681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ConditionalOperatorClass: 370852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitConditionalOperator(cast<ConditionalOperator>(S), asc); 3711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3724f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ContinueStmtClass: 3734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitContinueStmt(cast<ContinueStmt>(S)); 3741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 375021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXCatchStmtClass: 376021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXCatchStmt(cast<CXXCatchStmt>(S)); 377021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek 378c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu case Stmt::CXXMemberCallExprClass: 379c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitCXXMemberCallExpr(cast<CXXMemberCallExpr>(S), asc); 380c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 381021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXThrowExprClass: 382021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXThrowExpr(cast<CXXThrowExpr>(S)); 383021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek 384021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek case Stmt::CXXTryStmtClass: 385021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek return VisitCXXTryStmt(cast<CXXTryStmt>(S)); 386021c8afbab95c71fbdd95c0b5cea36fd316281f9Ted Kremenek 3874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DeclStmtClass: 3884f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclStmt(cast<DeclStmt>(S)); 3891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3904f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DefaultStmtClass: 3914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDefaultStmt(cast<DefaultStmt>(S)); 3921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3934f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::DoStmtClass: 3944f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDoStmt(cast<DoStmt>(S)); 3951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3964f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ForStmtClass: 3974f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitForStmt(cast<ForStmt>(S)); 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::GotoStmtClass: 4004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitGotoStmt(cast<GotoStmt>(S)); 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IfStmtClass: 4034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIfStmt(cast<IfStmt>(S)); 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::IndirectGotoStmtClass: 4064f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitIndirectGotoStmt(cast<IndirectGotoStmt>(S)); 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::LabelStmtClass: 4094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitLabelStmt(cast<LabelStmt>(S)); 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 411115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek case Stmt::MemberExprClass: 412115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return VisitMemberExpr(cast<MemberExpr>(S), asc); 413115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 4144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtCatchStmtClass: 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return VisitObjCAtCatchStmt(cast<ObjCAtCatchStmt>(S)); 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtSynchronizedStmtClass: 4184f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S)); 4191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtThrowStmtClass: 4214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtThrowStmt(cast<ObjCAtThrowStmt>(S)); 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCAtTryStmtClass: 4244f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCAtTryStmt(cast<ObjCAtTryStmt>(S)); 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ObjCForCollectionStmtClass: 4274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S)); 4281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4294f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ParenExprClass: 4304f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek S = cast<ParenExpr>(S)->getSubExpr(); 4311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump goto tryAgain; 4321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::NullStmtClass: 4344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::ReturnStmtClass: 4374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitReturnStmt(cast<ReturnStmt>(S)); 4381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SizeOfAlignOfExprClass: 440852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitSizeOfAlignOfExpr(cast<SizeOfAlignOfExpr>(S), asc); 4411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::StmtExprClass: 443852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmtExpr(cast<StmtExpr>(S), asc); 4441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::SwitchStmtClass: 4464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitSwitchStmt(cast<SwitchStmt>(S)); 4471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek case Stmt::WhileStmtClass: 4494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitWhileStmt(cast<WhileStmt>(S)); 4504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 4514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 453852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitStmt(Stmt *S, AddStmtChoice asc) { 454852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 456852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, S, asc); 4576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitChildren(S); 4604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitChildren - Visit the children of a Stmt. 4634f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitChildren(Stmt* Terminator) { 4644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = Block; 4654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (Stmt::child_iterator I = Terminator->child_begin(), 4664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek E = Terminator->child_end(); I != E; ++I) { 4674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (*I) B = Visit(*I); 4686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return B; 4704f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 472852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitAddrLabelExpr(AddrLabelExpr *A, 473852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek AddressTakenLabels.insert(A->getLabel()); 4756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 476852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 4774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 478852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, A, asc); 4796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 4806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 4814f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 4824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 4831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 484852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBinaryOperator(BinaryOperator *B, 485852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 4864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (B->isLogicalOp()) { // && or || 4874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 488852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, B, asc); 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4904f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!FinishBlock(ConfluenceBlock)) 4914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 4921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4934f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the LHS 4944f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* LHSBlock = createBlock(false); 4954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LHSBlock->setTerminator(B); 4961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4974f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // create the block evaluating the RHS 4984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = ConfluenceBlock; 4994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = NULL; 5004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* RHSBlock = addStmt(B->getRHS()); 5014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!FinishBlock(RHSBlock)) 5024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 50400998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 505941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal = TryEvaluateBool(B->getLHS()); 506941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek if (KnownVal.isKnown() && (B->getOpcode() == BinaryOperator::LOr)) 507941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek KnownVal.negate(); 50800998a068e50945118f334c98af05ed44d7c22a6Mike Stump 5094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now link the LHSBlock with RHSBlock. 5104f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (B->getOpcode() == BinaryOperator::LOr) { 511ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 512ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 5131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } else { 5146db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(B->getOpcode() == BinaryOperator::LAnd); 515ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); 516ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); 51719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 5181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Generate the blocks for evaluating the LHS. 5204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = LHSBlock; 5214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek else if (B->getOpcode() == BinaryOperator::Comma) { // , 5246dc534ecc19a045ebcfe93eefa45da509968e888Ted Kremenek autoCreateBlock(); 525852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, B, asc); 5264f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(B->getRHS()); 5274f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(B->getLHS()); 5286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 5291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 530852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(B, asc); 5314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 533852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitBlockExpr(BlockExpr *E, AddStmtChoice asc) { 534852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 535721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek autoCreateBlock(); 536852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, E, asc); 537721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek } 538721903eca33f6115296083aed17685eaa73d3e8cTed Kremenek return Block; 5394f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 540cd7bf230a77c550115e4a78ee371fc49a7563692Mike Stump 5414f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitBreakStmt(BreakStmt *B) { 5424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // "break" is a control-flow statement. Thus we stop processing the current 5434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // block. 5444f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 5454f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 5461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Now create a new block that ends with the break statement. 5484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = createBlock(false); 5494f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block->setTerminator(B); 5501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5514f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If there is no target for the break, then we are looking at an incomplete 5524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // AST. This means that the CFG cannot be constructed. 5534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (BreakTargetBlock) 554ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, BreakTargetBlock); 5554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek else 5564f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek badCFG = true; 5571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 5604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 5611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5624c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stumpstatic bool CanThrow(Expr *E) { 5634c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump QualType Ty = E->getType(); 5644c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Ty->isFunctionPointerType()) 5654c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<PointerType>()->getPointeeType(); 5664c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump else if (Ty->isBlockPointerType()) 5674c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump Ty = Ty->getAs<BlockPointerType>()->getPointeeType(); 5684c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 5694c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump const FunctionType *FT = Ty->getAs<FunctionType>(); 5704c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (FT) { 5714c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT)) 5724c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (Proto->hasEmptyExceptionSpec()) 5734c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return false; 5744c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump } 5754c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return true; 5764c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump} 5774c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 578852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitCallExpr(CallExpr *C, AddStmtChoice asc) { 5794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If this is a call to a no-return function, this stops the block here. 5802455636163fdd18581d7fdae816433f886d88213Mike Stump bool NoReturn = false; 581264ba48dc98f3f843935a485d5b086f7e0fdc4f1Rafael Espindola if (getFunctionExtInfo(*C->getCallee()->getType()).getNoReturn()) { 5822455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 5832455636163fdd18581d7fdae816433f886d88213Mike Stump } 5842455636163fdd18581d7fdae816433f886d88213Mike Stump 5854c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdge = false; 586079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 587079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Languages without exceptions are assumed to not throw. 588079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Context->getLangOptions().Exceptions) { 5894c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdges) 5904c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = true; 591079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 592079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 593079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FunctionDecl *FD = C->getDirectCallee()) { 5942455636163fdd18581d7fdae816433f886d88213Mike Stump if (FD->hasAttr<NoReturnAttr>()) 5952455636163fdd18581d7fdae816433f886d88213Mike Stump NoReturn = true; 596079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (FD->hasAttr<NoThrowAttr>()) 5974c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 598079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 5992455636163fdd18581d7fdae816433f886d88213Mike Stump 6004c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (!CanThrow(C->getCallee())) 6014c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump AddEHEdge = false; 6024c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump 6034c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (!NoReturn && !AddEHEdge) 604910716678e8af41432f3dfb16b340168597f8c45Zhongxing Xu return VisitStmt(C, AddStmtChoice::AlwaysAdd); 6051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 606079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Block) { 607079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Succ = Block; 608079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (!FinishBlock(Block)) 609079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return 0; 610079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 612079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Block = createBlock(!NoReturn); 613852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(Block, C, asc); 6142455636163fdd18581d7fdae816433f886d88213Mike Stump 615079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (NoReturn) { 616079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Wire this to the exit block directly. 617079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 618079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6194c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump if (AddEHEdge) { 620079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump // Add exceptional edges. 621079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (TryTerminatedBlock) 622079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, TryTerminatedBlock); 623079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else 624079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump AddSuccessor(Block, &cfg->getExit()); 625079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6272455636163fdd18581d7fdae816433f886d88213Mike Stump return VisitChildren(C); 628d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 629d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 630852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitChooseExpr(ChooseExpr *C, 631852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 6323fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 633852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 6343fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek if (!FinishBlock(ConfluenceBlock)) 6353fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 637115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 638115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 639115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 6403fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6413fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 642115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock* LHSBlock = addStmt(C->getLHS(), asc); 6433fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek if (!FinishBlock(LHSBlock)) 6443fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6463fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Succ = ConfluenceBlock; 6473fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = NULL; 648115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock* RHSBlock = addStmt(C->getRHS(), asc); 6493fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek if (!FinishBlock(RHSBlock)) 6503fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek return 0; 6511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6523fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block = createBlock(false); 65300998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 654941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 655ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 656ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 6573fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek Block->setTerminator(C); 6581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return addStmt(C->getCond()); 6593fc8ef574cdc09c613c329ee511852d219263c15Ted Kremenek} 6601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6621eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpCFGBlock* CFGBuilder::VisitCompoundStmt(CompoundStmt* C) { 663079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump EndScope(C); 664079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 6651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CFGBlock* LastBlock = Block; 6664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 6674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (CompoundStmt::reverse_body_iterator I=C->body_rbegin(), E=C->body_rend(); 6684f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek I != E; ++I ) { 6694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LastBlock = addStmt(*I); 6701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 671e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek if (badCFG) 672e8d6d2b9a2c5d3f0e7e0f88f54f1711bbc6c6f78Ted Kremenek return NULL; 6731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 674079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 675079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump LastBlock = StartScope(C, LastBlock); 676079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 6774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return LastBlock; 6784f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 6791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 680852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock *CFGBuilder::VisitConditionalOperator(ConditionalOperator *C, 681852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 682f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the confluence block that will "merge" the results of the ternary 683f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // expression. 684f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); 685852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AppendStmt(ConfluenceBlock, C, asc); 686f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (!FinishBlock(ConfluenceBlock)) 687f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 6881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 689115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek asc = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 690115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AlwaysAdd; 691115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 692f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create a block for the LHS expression if there is an LHS expression. A 693f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // GCC extension allows LHS to be NULL, causing the condition to be the 694f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // value that is returned instead. 695f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // e.g: x ?: y is shorthand for: x ? x : y; 696f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 697f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 698f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek CFGBlock* LHSBlock = NULL; 699f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (C->getLHS()) { 700115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek LHSBlock = addStmt(C->getLHS(), asc); 701f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (!FinishBlock(LHSBlock)) 702f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 703f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = NULL; 704f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 706f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block for the RHS expression. 707f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Succ = ConfluenceBlock; 708115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek CFGBlock* RHSBlock = addStmt(C->getRHS(), asc); 709f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek if (!FinishBlock(RHSBlock)) 710f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return 0; 7111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 712f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek // Create the block that will contain the condition. 713f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block = createBlock(false); 7141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 71500998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 716941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(C->getCond()); 717e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (LHSBlock) { 718ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); 719e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 720941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek if (KnownVal.isFalse()) { 721e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we know the condition is false, add NULL as the successor for 722e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the block containing the condition. In this case, the confluence 723e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // block will have just one predecessor. 724ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, 0); 725941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 1); 726e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } else { 727e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // If we have no LHS expression, add the ConfluenceBlock as a direct 728e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // successor for the block containing the condition. Moreover, we need to 729e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // reverse the order of the predecessors in the ConfluenceBlock because 730e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // the RHSBlock will have been added to the succcessors already, and we 731e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // want the first predecessor to the the block containing the expression 732e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump // for the case when the ternary expression evaluates to true. 733ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ConfluenceBlock); 734941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek assert(ConfluenceBlock->pred_size() == 2); 735e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump std::reverse(ConfluenceBlock->pred_begin(), 736e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump ConfluenceBlock->pred_end()); 737e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump } 738f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek } 7391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 740ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); 741f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek Block->setTerminator(C); 742f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek return addStmt(C->getCond()); 743f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek} 744f34bb2eaa87aa28bcc8b6ff0dfc696cd75605b11Ted Kremenek 7454f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclStmt(DeclStmt *DS) { 7464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek autoCreateBlock(); 7476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 7484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (DS->isSingleDecl()) { 749ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DS); 7504f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitDeclSubExpr(DS->getSingleDecl()); 751d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek } 7521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7534f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *B = 0; 7541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7554f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: Add a reverse iterator for DeclStmt to avoid this extra copy. 7564f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek typedef llvm::SmallVector<Decl*,10> BufTy; 7574f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BufTy Buf(DS->decl_begin(), DS->decl_end()); 7581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7594f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (BufTy::reverse_iterator I = Buf.rbegin(), E = Buf.rend(); I != E; ++I) { 7604f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Get the alignment of the new DeclStmt, padding out to >=8 bytes. 7614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek unsigned A = llvm::AlignOf<DeclStmt>::Alignment < 8 7624f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ? 8 : llvm::AlignOf<DeclStmt>::Alignment; 7631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7644f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Allocate the DeclStmt using the BumpPtrAllocator. It will get 7654f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // automatically freed with the CFG. 7664f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclGroupRef DG(*I); 7674f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Decl *D = *I; 7681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump void *Mem = cfg->getAllocator().Allocate(sizeof(DeclStmt), A); 7694f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DeclStmt *DSNew = new (Mem) DeclStmt(DG, D->getLocation(), GetEndLoc(D)); 7701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7714f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // Append the fake DeclStmt to block. 772ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, DSNew); 7734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek B = VisitDeclSubExpr(D); 7744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 7751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return B; 7774f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 7781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitDeclSubExpr - Utility method to add block-level expressions for 7804f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// initializers in Decls. 7814f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDeclSubExpr(Decl* D) { 7824f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(Block); 783d34066c224f782056c18f154abe04ef590473fd9Ted Kremenek 7844f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VarDecl *VD = dyn_cast<VarDecl>(D); 7851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!VD) 7874f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 7881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Expr *Init = VD->getInit(); 7901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7914f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Init) { 7925ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek AddStmtChoice::Kind k = 7935ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek VD->getType()->isReferenceType() ? AddStmtChoice::AsLValueNotAlwaysAdd 7945ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek : AddStmtChoice::NotAlwaysAdd; 7955ba290a12fb9390a77ea4dca3d98deb53022d182Ted Kremenek Visit(Init, AddStmtChoice(k)); 7964f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } 7971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // If the type of VD is a VLA, then we must process its size expressions. 7994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(VD->getType().getTypePtr()); VA != 0; 8004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA = FindVA(VA->getElementType().getTypePtr())) 8014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Block = addStmt(VA->getSizeExpr()); 8021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8034f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 804d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 805fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 806d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitIfStmt(IfStmt* I) { 8076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We may see an if statement in the middle of a basic block, or it may be the 8086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // first statement we are processing. In either case, we create a new basic 8096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. First, we create the blocks for the then...else statements, and 8106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // then we create the block containing the if statement. If we were in the 8116c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // middle of a block, we stop processing that block. That block is then the 8126c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // implicit successor for the "then" and "else" clauses. 8136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The block we were proccessing is now finished. Make it the successor 8156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 8166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 817d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = Block; 8184e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 8194e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 820c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 822b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the false branch. 823d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ElseBlock = Succ; 8246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 825d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* Else = I->getElse()) { 826d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 828d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block so that the recursive call to Visit will 8296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // create a new basic block. 830d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 8314f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ElseBlock = addStmt(Else); 8326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 833b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek if (!ElseBlock) // Can occur when the Else body has all NullStmts. 834b6f7b72047b3fd3f96a5040e1e4d520a9dea01cdTed Kremenek ElseBlock = sv.get(); 8354e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 8364e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(ElseBlock)) 8374e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8384e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 839c310e933a9b023a280f3aa02e5a0c75398555e13Ted Kremenek } 8406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 841b6f1d782e0dc5fad138a17e6aa0ff6f9bc4788c6Ted Kremenek // Process the true branch. 842d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* ThenBlock; 843d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 844d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Stmt* Then = I->getThen(); 8456db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Then); 846d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> sv(Succ); 8476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Block = NULL; 8484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek ThenBlock = addStmt(Then); 8496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 850dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek if (!ThenBlock) { 851dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // We can reach here if the "then" body has all NullStmts. 852dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // Create an empty block so we can distinguish between true and false 853dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek // branches in path-sensitive analyses. 854dbdf7949a7a50f5a65055a3e95f6432ecc541056Ted Kremenek ThenBlock = createBlock(false); 855ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ThenBlock, sv.get()); 8566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (Block) { 8574e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(ThenBlock)) 8584e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 8596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 8600cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek } 861d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 8626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now create a new block containing the if statement. 863d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 8646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 865d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Set the terminator of the new block to the If statement. 866d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(I); 8676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 86800998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 869941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(I->getCond()); 87000998a068e50945118f334c98af05ed44d7c22a6Mike Stump 871d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now add the successors. 872ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isFalse() ? NULL : ThenBlock); 873ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, KnownVal.isTrue()? NULL : ElseBlock); 8746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the condition as the last statement in the new block. This may create 8766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // new blocks as the condition may contain control-flow. Any newly created 8776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // blocks will be pointed to be "Block". 87861dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek Block = addStmt(I->getCond()); 87961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek 88061dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // Finally, if the IfStmt contains a condition variable, add both the IfStmt 88161dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek // and the condition variable initialization to the CFG. 88261dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (VarDecl *VD = I->getConditionVariable()) { 88361dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek if (Expr *Init = VD->getInit()) { 88461dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek autoCreateBlock(); 88561dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek AppendStmt(Block, I, AddStmtChoice::AlwaysAdd); 88661dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek addStmt(Init); 88761dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 88861dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek } 88961dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek 89061dfbecd8e6181b2ba42ffb5feede27a2bab3b8aTed Kremenek return Block; 891d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 8926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 8936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 894d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitReturnStmt(ReturnStmt* R) { 8956c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 896d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // 8976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NOTE: If a "return" appears in the middle of a block, this means that the 8986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // code afterwards is DEAD (unreachable). We still keep a basic block 8996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for that code; a simple "mark-and-sweep" from the entry block will be 9006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // able to report such dead blocks. 9016c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek if (Block) 9026c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek FinishBlock(Block); 903d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 904d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the new block. 905d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 9066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 907d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // The Exit block is the only successor. 908ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 9096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the return statement to the block. This may create new blocks if R 9116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // contains control-flow (short-circuit operations). 912852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(R, AddStmtChoice::AlwaysAdd); 913d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 9140cebe3e29b22d11f2c65ef28fcfb5f0431877266Ted Kremenek 915d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitLabelStmt(LabelStmt* L) { 916d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Get the block of the labeled statement. Add it to our map. 9174f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(L->getSubStmt()); 9182677ea871a25aa79f9db360f6ed10584c02267adTed Kremenek CFGBlock* LabelBlock = Block; 9196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!LabelBlock) // This can happen when the body is empty, i.e. 9214f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LabelBlock = createBlock(); // scopes that only contains NullStmts. 9226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(LabelMap.find(L) == LabelMap.end() && "label already in map"); 924d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMap[ L ] = LabelBlock; 9256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Labels partition blocks, so this is the end of the basic block we were 9276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing (L is the block's label). Because this is label (and we have 9286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // already processed the substatement) there is no extra control-flow to worry 9296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // about. 9309cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek LabelBlock->setLabel(L); 9314e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(LabelBlock)) 9324e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 9336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary); 935d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 9366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 937d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // This block is now the implicit successor of other blocks. 938d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = LabelBlock; 9396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 940d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return LabelBlock; 941d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 94231dcd3c8c4df5a656f58f50ea73afc177c101c67Ted Kremenek 943d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitGotoStmt(GotoStmt* G) { 9446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Goto is a control-flow statement. Thus we stop processing the current 9456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block and create a new one. 9464f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block) 9474f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek FinishBlock(Block); 9484f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 949d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 950d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(G); 9516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we already know the mapping to the label block add the successor now. 953d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LabelMapTy::iterator I = LabelMap.find(G->getLabel()); 9546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 955d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (I == LabelMap.end()) 956d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We will need to backpatch this block later. 957d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BackpatchBlocks.push_back(Block); 958d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek else 959ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, I->second); 960d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 9616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 962d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 963d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 964d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) { 965d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 9666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 967fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "for" is a control-flow statement. Thus we stop processing the current 968fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 969d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 9704e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 9714e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 972d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 9734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 9744f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 9756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 9776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 9786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 97949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 98049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 9816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 98249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 9836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(F); 9846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 9856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 9866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 98749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = F->getCond()) { 98849af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 98949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 99058b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 99158b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek 99258b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // If this block contains a condition variable, add both the condition 99358b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek // variable and initializer to the CFG. 99458b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (VarDecl *VD = F->getConditionVariable()) { 99558b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek if (Expr *Init = VD->getInit()) { 99658b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek autoCreateBlock(); 99758b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek AppendStmt(Block, F, AddStmtChoice::AlwaysAdd); 99858b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek EntryConditionBlock = addStmt(Init); 99958b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek assert(Block == EntryConditionBlock); 100058b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 100158b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek } 100258b87feeaedce7ef09c2931a39d82e5aea189f41Ted Kremenek 10034e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 10044e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 10054e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10064e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 100749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 1008d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 10096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 10106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 101149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 10126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 101300998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1014941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek TryResult KnownVal(true); 10151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 101600998a068e50945118f334c98af05ed44d7c22a6Mike Stump if (F->getCond()) 101700998a068e50945118f334c98af05ed44d7c22a6Mike Stump KnownVal = TryEvaluateBool(F->getCond()); 101800998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1019d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create the loop body. 1020d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 10216db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(F->getBody()); 10226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1023d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1024d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 10255d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_continue(ContinueTargetBlock), 10265d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_break(BreakTargetBlock); 10276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1028af603f742491dc4707138c0293d295171fdd51baTed Kremenek // Create a new block to contain the (bottom) of the loop body. 1029af603f742491dc4707138c0293d295171fdd51baTed Kremenek Block = NULL; 10306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1031e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek if (Stmt* I = F->getInc()) { 10326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Generate increment code in its own basic block. This is the target of 10336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // continue statements. 10344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek Succ = addStmt(I); 10356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // No increment code. Create a special, empty, block that is used as the 10376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // target block for "looping back" to the start of the loop. 10383575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Succ == EntryConditionBlock); 10393575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Succ = createBlock(); 1040e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek } 10416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10423575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // Finish up the increment (or empty) block if it hasn't been already. 10433575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek if (Block) { 10443575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek assert(Block == Succ); 10454e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 10464e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 10473575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek Block = 0; 10483575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek } 10496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10503575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock = Succ; 10516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10523575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // The starting block for the loop increment is the block that should 10533575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek // represent the 'loop target' for looping back to the start of the loop. 10543575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek ContinueTargetBlock->setLoopTarget(F); 10553575f84e459033d6427b84b4b795b22c85c4d27dTed Kremenek 1056e933450535ab077b95e59f929a4ccb25b6f360e6Ted Kremenek // All breaks should go to the code following the loop. 10576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump BreakTargetBlock = LoopSuccessor; 10586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 10596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now populate the body block, and in the process create new blocks as we 10606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // walk the body of the loop. 10614f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(F->getBody()); 1062af603f742491dc4707138c0293d295171fdd51baTed Kremenek 1063af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 10641d4b218fa55239f2a7350f48be14090d2753c22cZhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "for (...;...;...) ;" 1065941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek else if (Block && !FinishBlock(BodyBlock)) 1066941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek return 0; 10676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1068941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // This new body block is a successor to our "exit" condition block. 1069ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1070d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 10716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1072941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1073941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1074ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 10756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1076d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If the loop contains initialization, create a new block for those 10776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statements. This block can also contain statements that precede the loop. 1078d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Stmt* I = F->getInit()) { 1079d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(); 108049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return addStmt(I); 10816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else { 10826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There is no loop initialization. We are thus basically a while loop. 10836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // NULL out Block to force lazy block construction. 10842bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek Block = NULL; 10855482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 108649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 10872bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek } 1088d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1089d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1090115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted KremenekCFGBlock *CFGBuilder::VisitMemberExpr(MemberExpr *M, AddStmtChoice asc) { 1091115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek if (asc.alwaysAdd()) { 1092115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek autoCreateBlock(); 1093115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek AppendStmt(Block, M, asc); 1094115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek } 1095115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek return Visit(M->getBase(), 1096115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek M->isArrow() ? AddStmtChoice::NotAlwaysAdd 1097115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek : AddStmtChoice::AsLValueNotAlwaysAdd); 1098115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek} 1099115c1b9cc758d15f38e1d2ad4cf07b1cacfb3115Ted Kremenek 1100514de5a21645900c92cf4f4f7313d6f66945d134Ted KremenekCFGBlock* CFGBuilder::VisitObjCForCollectionStmt(ObjCForCollectionStmt* S) { 1101514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Objective-C fast enumeration 'for' statements: 1102514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC 1103514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1104514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( Type newVariable in collection_expression ) { statements } 1105514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1106514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1107514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1108514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // prologue: 1109514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. collection_expression 1110514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1111514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // loop_entry: 11124cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // 1. side-effects of element expression 1113514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1. ObjCForCollectionStmt [performs binding to newVariable] 1114514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. ObjCForCollectionStmt TB, FB [jumps to TB if newVariable != nil] 1115514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // TB: 1116514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // statements 1117514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // T. jump to loop_entry 1118514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // FB: 1119514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // what comes after 1120514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1121514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // and 1122514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1123514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Type existingItem; 1124514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // for ( existingItem in expression ) { statements } 1125514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 1126514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // becomes: 1127514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same with newVariable replaced with existingItem; the binding works 11296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the same except that for one ObjCForCollectionStmt::getElement() returns 11306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // a DeclStmt and the other returns a DeclRefExpr. 1131514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // 11326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1133514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek CFGBlock* LoopSuccessor = 0; 11346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1135514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek if (Block) { 11364e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 11374e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1138514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek LoopSuccessor = Block; 1139514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek Block = 0; 11404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 11414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 11426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11434cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Build the condition blocks. 11444cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 11454cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 11466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11474cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Set the terminator for the "exit" condition block. 11486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(S); 11496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The last statement in the block should be the ObjCForCollectionStmt, which 11516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // performs the actual binding to 'element' and determines if there are any 11526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // more items in the collection. 1153ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(ExitConditionBlock, S); 11544cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = ExitConditionBlock; 11556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11564cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Walk the 'element' expression to see if there are any side-effects. We 11576d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // generate new blocks as necesary. We DON'T add the statement by default to 11586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the CFG unless it contains control-flow. 1159852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek EntryConditionBlock = Visit(S->getElement(), AddStmtChoice::NotAlwaysAdd); 11606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (Block) { 11614e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 11624e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 11634e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek Block = 0; 11644e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 11656d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 11676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 11684cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Succ = EntryConditionBlock; 11696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11704cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Now create the true branch. 11716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump { 11724cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Save the current values for Succ, continue and break targets. 11734cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek SaveAndRestore<CFGBlock*> save_Succ(Succ), 11746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump save_continue(ContinueTargetBlock), save_break(BreakTargetBlock); 11756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11764cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BreakTargetBlock = LoopSuccessor; 11776d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = EntryConditionBlock; 11786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11794f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(S->getBody()); 11806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11814cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek if (!BodyBlock) 11824cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek BodyBlock = EntryConditionBlock; // can happen for "for (X in Y) ;" 11834e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 11844e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 11854e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 11864e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 11876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11884cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // This new body block is a successor to our "exit" condition block. 1189ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, BodyBlock); 11904cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek } 11916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 11924cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // Link up the condition block with the code that follows the loop. 11934cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek // (the false branch). 1194ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, LoopSuccessor); 11954cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek 1196514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek // Now create a prologue block to contain the collection expression. 11974cb3a855df3b3f8d551565cae9f43939a301ea89Ted Kremenek Block = createBlock(); 1198514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek return addStmt(S->getCollection()); 11996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 12006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1201b3b0b3624e462c2940f65b86e773bfc300005203Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt* S) { 1202b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // FIXME: Add locking 'primitives' to CFG for @synchronized. 12036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1204b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the body. 12054f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *SyncBlock = addStmt(S->getSynchBody()); 12066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1207da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // The sync body starts its own basic block. This makes it a little easier 1208da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek // for diagnostic clients. 1209da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek if (SyncBlock) { 1210da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek if (!FinishBlock(SyncBlock)) 1211da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek return 0; 12126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1213da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek Block = 0; 1214da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek } 12156d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1216da5348eda7bb45d715561249dec9833d51dfda67Ted Kremenek Succ = SyncBlock; 12176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1218b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek // Inline the sync expression. 12194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return addStmt(S->getSynchExpr()); 1220b3b0b3624e462c2940f65b86e773bfc300005203Ted Kremenek} 12216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1222e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtTryStmt(ObjCAtTryStmt* S) { 12234f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME 122490658ec72542df44eb462c69056184d2946bdbceTed Kremenek return NYS(); 1225e31c0d206b872b056dc42c3af21b11d5de4edfd9Ted Kremenek} 1226514de5a21645900c92cf4f4f7313d6f66945d134Ted Kremenek 1227d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitWhileStmt(WhileStmt* W) { 1228d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 12296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1230fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // "while" is a control-flow statement. Thus we stop processing the current 1231fefb9f7009702befaf715e7a8debc9505c3c8634Mike Stump // block. 1232d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 12334e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 12344e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1235d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 12364f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 12374f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 12386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 12406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 12416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 124249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 124349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 12446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 124549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 124649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ExitConditionBlock->setTerminator(W); 12476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 12496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. Thus we update 12506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "Succ" after adding the condition. 125149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = W->getCond()) { 125249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 125349af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 1254f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Block == EntryConditionBlock); 12554ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek 12564ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // If this block contains a condition variable, add both the condition 12574ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // variable and initializer to the CFG. 12584ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (VarDecl *VD = W->getConditionVariable()) { 12594ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek if (Expr *Init = VD->getInit()) { 12604ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek autoCreateBlock(); 12614ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek AppendStmt(Block, W, AddStmtChoice::AlwaysAdd); 12624ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek EntryConditionBlock = addStmt(Init); 12634ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek assert(Block == EntryConditionBlock); 12644ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 12654ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek } 12664ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek 12674e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 12684e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 12694e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 12704e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 127149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 12726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 12736d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // The condition block is the implicit successor for the loop body as well as 12746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // any code above the loop. 127549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 12766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 127700998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1278941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult& KnownVal = TryEvaluateBool(W->getCond()); 127900998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1280d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 1281d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 1282f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(W->getBody()); 1283d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1284d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1285d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 1286d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_continue(ContinueTargetBlock), 1287d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek save_break(BreakTargetBlock); 1288f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek 12896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Create an empty block to represent the transition block for looping back 12906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to the head of the loop. 1291f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Block = 0; 1292f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek assert(Succ == EntryConditionBlock); 1293f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ = createBlock(); 1294f6e8541dd884029b85483a319ce7d32f3e476dccTed Kremenek Succ->setLoopTarget(W); 12956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ContinueTargetBlock = Succ; 12966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1297d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1298d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 12996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1300d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1301f752fcfae84fbf21b78383bf2461633382d51844Ted Kremenek Block = NULL; 13026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1303d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 13044f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock* BodyBlock = addStmt(W->getBody()); 13056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1306af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1307d5c3b1339e842619fc3ae79482424f901aeb89f3Zhongxing Xu BodyBlock = ContinueTargetBlock; // can happen for "while(...) ;" 13084e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 13094e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 13104e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 13114e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 13126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1313941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Add the loop body entry as a successor to the condition. 1314ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); 1315bf15b278a439d73b605ec00a8d3977ef305712f4Ted Kremenek } 13166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1317941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. (the 1318941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // false branch). 1319ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 13206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the condition block since we loop back 13226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // to this block. NULL out Block to force lazy creation of another block. 1323d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 13246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13254ec010a6ccf4db2ab2ef9e68942642d50f7f193cTed Kremenek // Return the condition block, which is the dominating block for the loop. 13265482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = EntryConditionBlock; 132749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek return EntryConditionBlock; 1328d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 13291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13314f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitObjCAtCatchStmt(ObjCAtCatchStmt* S) { 13324f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // FIXME: For now we pretend that @catch and the code it contains does not 13334f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // exit. 13344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return Block; 13354f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 13366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13372fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted KremenekCFGBlock* CFGBuilder::VisitObjCAtThrowStmt(ObjCAtThrowStmt* S) { 13382fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // FIXME: This isn't complete. We basically treat @throw like a return 13392fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // statement. 13406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13416c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 13424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 13434f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 13446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13452fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // Create the new block. 13462fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek Block = createBlock(false); 13476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13482fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek // The Exit block is the only successor. 1349ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, &cfg->getExit()); 13506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add the statement to the block. This may create new blocks if S contains 13526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow (short-circuit operations). 1353852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(S, AddStmtChoice::AlwaysAdd); 13542fda504dccd79f91ac9a7d82acecfbab3eaa1719Ted Kremenek} 1355989d52d469df0c202f7de82f54407066c7db2e63Ted Kremenek 13560979d80615df97c675423de631c1b884819f4712Mike StumpCFGBlock* CFGBuilder::VisitCXXThrowExpr(CXXThrowExpr* T) { 13576c2497248bc4f7fd8e5fb0a206d20abbf0e16645Ted Kremenek // If we were in the middle of a block we stop processing that block. 13580979d80615df97c675423de631c1b884819f4712Mike Stump if (Block && !FinishBlock(Block)) 13590979d80615df97c675423de631c1b884819f4712Mike Stump return 0; 13600979d80615df97c675423de631c1b884819f4712Mike Stump 13610979d80615df97c675423de631c1b884819f4712Mike Stump // Create the new block. 13620979d80615df97c675423de631c1b884819f4712Mike Stump Block = createBlock(false); 13630979d80615df97c675423de631c1b884819f4712Mike Stump 13645d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (TryTerminatedBlock) 13655d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The current try statement is the only successor. 13665d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, TryTerminatedBlock); 13675d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump else 13685d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // otherwise the Exit block is the only successor. 13695d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump AddSuccessor(Block, &cfg->getExit()); 13700979d80615df97c675423de631c1b884819f4712Mike Stump 13710979d80615df97c675423de631c1b884819f4712Mike Stump // Add the statement to the block. This may create new blocks if S contains 13720979d80615df97c675423de631c1b884819f4712Mike Stump // control-flow (short-circuit operations). 1373852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek return VisitStmt(T, AddStmtChoice::AlwaysAdd); 13740979d80615df97c675423de631c1b884819f4712Mike Stump} 13750979d80615df97c675423de631c1b884819f4712Mike Stump 13764f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock *CFGBuilder::VisitDoStmt(DoStmt* D) { 1377d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* LoopSuccessor = NULL; 13786d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13798f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // "do...while" is a control-flow statement. Thus we stop processing the 13808f9893a2beeacd5149bd2d3d4c6e130516915068Mike Stump // current block. 1381d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 13824e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 13834e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1384d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek LoopSuccessor = Block; 13854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek } else 13864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek LoopSuccessor = Succ; 13876d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Because of short-circuit evaluation, the condition of the loop can span 13896d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that 13906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // evaluate the condition. 139149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* ExitConditionBlock = createBlock(false); 139249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* EntryConditionBlock = ExitConditionBlock; 13936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 139449af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Set the terminator for the "exit" condition block. 13956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump ExitConditionBlock->setTerminator(D); 13966d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 13976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Now add the actual condition to the condition block. Because the condition 13986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // itself may contain control-flow, new blocks may be created. 139949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek if (Stmt* C = D->getCond()) { 140049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = ExitConditionBlock; 140149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek EntryConditionBlock = addStmt(C); 14024e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 14034e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(EntryConditionBlock)) 14044e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14054e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 140649af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek } 14076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14085482713d70ecbfe608940018046aa248b3d03443Ted Kremenek // The condition block is the implicit successor for the loop body. 140949af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Succ = EntryConditionBlock; 141049af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 141100998a068e50945118f334c98af05ed44d7c22a6Mike Stump // See if this is a known constant. 1412941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek const TryResult &KnownVal = TryEvaluateBool(D->getCond()); 141300998a068e50945118f334c98af05ed44d7c22a6Mike Stump 1414d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Process the loop body. 141549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek CFGBlock* BodyBlock = NULL; 1416d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek { 14176db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(D->getBody()); 14186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1419d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current values for Block, Succ, and continue and break targets 1420d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), 14215d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_continue(ContinueTargetBlock), 14225d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump save_break(BreakTargetBlock); 14236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1424d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All continues within this loop should go to the condition block 142549af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek ContinueTargetBlock = EntryConditionBlock; 14266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1427d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // All breaks should go to the code following the loop. 1428d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = LoopSuccessor; 14296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1430d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // NULL out Block to force lazy instantiation of blocks for the body. 1431b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek Block = NULL; 14326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1433d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create the body. The returned block is the entry to the loop body. 14344f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek BodyBlock = addStmt(D->getBody()); 14356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1436af603f742491dc4707138c0293d295171fdd51baTed Kremenek if (!BodyBlock) 1437a9d996dbeb719200c4a9d86f68166a237583025fTed Kremenek BodyBlock = EntryConditionBlock; // can happen for "do ; while(...)" 14384e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek else if (Block) { 14394e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 14404e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14414e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 14426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14438f08c9d83fdabb6f27c44a4dbce78487519c89ebTed Kremenek // Add an intermediate block between the BodyBlock and the 14446d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // ExitConditionBlock to represent the "loop back" transition. Create an 14456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // empty block to represent the transition block for looping back to the 14466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // head of the loop. 14478f08c9d83fdabb6f27c44a4dbce78487519c89ebTed Kremenek // FIXME: Can we do this more efficiently without adding another block? 14488f08c9d83fdabb6f27c44a4dbce78487519c89ebTed Kremenek Block = NULL; 14498f08c9d83fdabb6f27c44a4dbce78487519c89ebTed Kremenek Succ = BodyBlock; 14508f08c9d83fdabb6f27c44a4dbce78487519c89ebTed Kremenek CFGBlock *LoopBackBlock = createBlock(); 14518f08c9d83fdabb6f27c44a4dbce78487519c89ebTed Kremenek LoopBackBlock->setLoopTarget(D); 14526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1453941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Add the loop body entry as a successor to the condition. 1454ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : LoopBackBlock); 1455b5c13b0f4e438391b31dacb87641be7a1b990b57Ted Kremenek } 14566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1457941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // Link up the condition block with the code that follows the loop. 1458941fde8019d47c694b8483db45d5878818fa69d1Ted Kremenek // (the false branch). 1459ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); 14606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 14616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // There can be no more statements in the body block(s) since we loop back to 14626d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the body. NULL out Block to force lazy creation of another block. 1463d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 14646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1465d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Return the loop body, which is the dominating block for the loop. 14665482713d70ecbfe608940018046aa248b3d03443Ted Kremenek Succ = BodyBlock; 1467d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return BodyBlock; 1468d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1469d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1470d4fdee35477e439759eea5f67ea03ff0c570fabaTed KremenekCFGBlock* CFGBuilder::VisitContinueStmt(ContinueStmt* C) { 1471d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // "continue" is a control-flow statement. Thus we stop processing the 1472d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // current block. 14734f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 14744e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 14756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1476d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now create a new block that ends with the continue statement. 1477d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = createBlock(false); 1478d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block->setTerminator(C); 14796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1480d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // If there is no target for the continue, then we are looking at an 1481235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek // incomplete AST. This means the CFG cannot be constructed. 1482235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek if (ContinueTargetBlock) 1483ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, ContinueTargetBlock); 1484235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek else 1485235c5ed8bee5bbcb45de1707d6988635e49b10b8Ted Kremenek badCFG = true; 14866d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1487d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek return Block; 1488d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 14891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 149013fc08a323b29dd97a46def1e3a15bf082476efaTed KremenekCFGBlock *CFGBuilder::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, 1491852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek AddStmtChoice asc) { 149213fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek 1493852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 149413fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1495ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, E); 149613fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 14971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14984f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek // VLA types have expressions that must be evaluated. 14994f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (E->isArgumentType()) { 15004f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek for (VariableArrayType* VA = FindVA(E->getArgumentType().getTypePtr()); 15014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek VA != 0; VA = FindVA(VA->getElementType().getTypePtr())) 15024f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(VA->getSizeExpr()); 15034e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 15041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Block; 1506d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 15071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15084f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// VisitStmtExpr - Utility method to handle (nested) statement 15094f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek/// expressions (a GCC extension). 1510852274d4257134906995cb252fb3dfd2d71deae8Ted KremenekCFGBlock* CFGBuilder::VisitStmtExpr(StmtExpr *SE, AddStmtChoice asc) { 1511852274d4257134906995cb252fb3dfd2d71deae8Ted Kremenek if (asc.alwaysAdd()) { 151213fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek autoCreateBlock(); 1513ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AppendStmt(Block, SE); 151413fc08a323b29dd97a46def1e3a15bf082476efaTed Kremenek } 15154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return VisitCompoundStmt(SE->getSubStmt()); 15164f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek} 1517d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1518411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitSwitchStmt(SwitchStmt* Terminator) { 15196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // "switch" is a control-flow statement. Thus we stop processing the current 15206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 1521d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek CFGBlock* SwitchSuccessor = NULL; 15226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1523d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek if (Block) { 15244e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(Block)) 15254e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1526d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchSuccessor = Block; 15276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else SwitchSuccessor = Succ; 1528d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 1529d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Save the current "switch" context. 1530d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SaveAndRestore<CFGBlock*> save_switch(SwitchTerminatedBlock), 1531eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_break(BreakTargetBlock), 1532eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek save_default(DefaultCaseBlock); 1533eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 15346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Set the "default" case to be the block after the switch statement. If the 15356d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // switch statement contains a "default:", this value will be overwritten with 15366d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the block for that code. 1537eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = SwitchSuccessor; 15386d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1539d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Create a new block that will contain the switch statement. 1540d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek SwitchTerminatedBlock = createBlock(false); 15416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1542d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Now process the switch body. The code after the switch is the implicit 1543d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // successor. 1544d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = SwitchSuccessor; 1545d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek BreakTargetBlock = SwitchSuccessor; 15466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // When visiting the body, the case statements should automatically get linked 15486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // up to the switch. We also don't keep a pointer to the body, since all 15496d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // control-flow from the switch goes to case/default statements. 15506db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getBody() && "switch must contain a non-NULL body"); 155149af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek Block = NULL; 15524f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CFGBlock *BodyBlock = addStmt(Terminator->getBody()); 15534e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (Block) { 15544e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(BodyBlock)) 15554e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 15564e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek } 155749af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek 15586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // If we have no "default:" case, the default transition is to the code 15596d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // following the switch body. 1560ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, DefaultCaseBlock); 15616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 156249af7cb8a3aca79783e7a0708b97a8f856f0da22Ted Kremenek // Add the terminator and condition in the switch block. 1563411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek SwitchTerminatedBlock->setTerminator(Terminator); 15646db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getCond() && "switch condition must be non-NULL"); 1565d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = SwitchTerminatedBlock; 15666b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek Block = addStmt(Terminator->getCond()); 15676b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek 15686b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // Finally, if the SwitchStmt contains a condition variable, add both the 15696b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek // SwitchStmt and the condition variable initialization to the CFG. 15706b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (VarDecl *VD = Terminator->getConditionVariable()) { 15716b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek if (Expr *Init = VD->getInit()) { 15726b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek autoCreateBlock(); 15736b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek AppendStmt(Block, Terminator, AddStmtChoice::AlwaysAdd); 15746b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek addStmt(Init); 15756b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 15766b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek } 15776b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek 15786b501ebaf172b28d6d7e1737db27f915175ad3c8Ted Kremenek return Block; 1579d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 1580d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 15814f88063677a2d990a44bb0d5f8437d2498b91d7fTed KremenekCFGBlock* CFGBuilder::VisitCaseStmt(CaseStmt* CS) { 15826d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // CaseStmts are essentially labels, so they are the first statement in a 15836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block. 158429ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek 15854f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (CS->getSubStmt()) 15864f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(CS->getSubStmt()); 15871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 158829ccaa186ac27bcb414c5acb069f6438b27dd5e7Ted Kremenek CFGBlock* CaseBlock = Block; 15894f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!CaseBlock) 15904f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock = createBlock(); 15916d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Cases statements partition blocks, so this is the top of the basic block we 15936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // were processing (the "case XXX:" is the label). 15944f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek CaseBlock->setLabel(CS); 15954f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 15964e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(CaseBlock)) 15974e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 15986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 15996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Add this block to the list of successors for the block with the switch 16006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // statement. 16014f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek assert(SwitchTerminatedBlock); 1602ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(SwitchTerminatedBlock, CaseBlock); 16036d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1604d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1605d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Block = NULL; 16066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1607d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // This block is now the implicit successor of other blocks. 1608d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek Succ = CaseBlock; 16096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16102677ea871a25aa79f9db360f6ed10584c02267adTed Kremenek return CaseBlock; 1611d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek} 16126d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1613411cdee0b490f79428c9eb977f25199eb7d21cd8Ted KremenekCFGBlock* CFGBuilder::VisitDefaultStmt(DefaultStmt* Terminator) { 16144f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Terminator->getSubStmt()) 16154f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek addStmt(Terminator->getSubStmt()); 16161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1617eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek DefaultCaseBlock = Block; 16184f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 16194f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (!DefaultCaseBlock) 16204f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek DefaultCaseBlock = createBlock(); 16216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Default statements partition blocks, so this is the top of the basic block 16236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // we were processing (the "default:" is the label). 1624411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek DefaultCaseBlock->setLabel(Terminator); 16251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16264e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek if (!FinishBlock(DefaultCaseBlock)) 16274e8df2eb7072db8f66572c3db31a2a08b12a752eTed Kremenek return 0; 1628eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek 16296d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Unlike case statements, we don't add the default block to the successors 16306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // for the switch statement immediately. This is done when we finish 16316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // processing the switch statement. This allows for the default case 16326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // (including a fall-through to the code after the switch statement) to always 16336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // be the last successor of a switch-terminated block. 16346d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1635eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // We set Block to NULL to allow lazy creation of a new block (if necessary) 1636eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Block = NULL; 16376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1638eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek // This block is now the implicit successor of other blocks. 1639eef5a9ac59f4f8b868ef0657ccf6bec81b4fe37aTed Kremenek Succ = DefaultCaseBlock; 16406d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 16416d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return DefaultCaseBlock; 1642295222c1f0926d84de77f076e79903523eeb5dbfTed Kremenek} 1643d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek 16445d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock *CFGBuilder::VisitCXXTryStmt(CXXTryStmt *Terminator) { 16455d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // "try"/"catch" is a control-flow statement. Thus we stop processing the 16465d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // current block. 16475d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* TrySuccessor = NULL; 16485d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16495d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (Block) { 16505d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!FinishBlock(Block)) 16515d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 16525d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump TrySuccessor = Block; 16535d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else TrySuccessor = Succ; 16545d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1655a1f93631a84621d77aeb627691da85a8991af188Mike Stump CFGBlock *PrevTryTerminatedBlock = TryTerminatedBlock; 16565d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16575d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Create a new block that will contain the try statement. 1658f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump CFGBlock *NewTryTerminatedBlock = createBlock(false); 16595d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add the terminator in the try block. 1660f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump NewTryTerminatedBlock->setTerminator(Terminator); 16615d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1662a1f93631a84621d77aeb627691da85a8991af188Mike Stump bool HasCatchAll = false; 16635d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump for (unsigned h = 0; h <Terminator->getNumHandlers(); ++h) { 16645d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 16655d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 16665d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CXXCatchStmt *CS = Terminator->getHandler(h); 1667a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl() == 0) { 1668a1f93631a84621d77aeb627691da85a8991af188Mike Stump HasCatchAll = true; 1669a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 16705d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 16715d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock *CatchBlock = VisitCXXCatchStmt(CS); 16725d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CatchBlock == 0) 16735d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 16745d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // Add this block to the list of successors for the block with the try 16755d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // statement. 1676f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, CatchBlock); 16775d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 1678a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (!HasCatchAll) { 1679a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (PrevTryTerminatedBlock) 1680f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, PrevTryTerminatedBlock); 1681a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 1682f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump AddSuccessor(NewTryTerminatedBlock, &cfg->getExit()); 1683a1f93631a84621d77aeb627691da85a8991af188Mike Stump } 16845d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16855d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // The code after the try is the implicit successor. 16865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Succ = TrySuccessor; 16875d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1688f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump // Save the current "try" context. 1689f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump SaveAndRestore<CFGBlock*> save_try(TryTerminatedBlock); 1690f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump TryTerminatedBlock = NewTryTerminatedBlock; 1691f00cca5e05bb9ea51a3a21c8014ff9f3508d46e9Mike Stump 16926db0ad32fa0987ff76d4c41393991ef4b6895ea3Ted Kremenek assert(Terminator->getTryBlock() && "try must contain a non-NULL body"); 16935d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 16943fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek Block = addStmt(Terminator->getTryBlock()); 16955d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return Block; 16965d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 16975d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 16985d1d20227878cd03db8b2dd23efd4cedfe874feeMike StumpCFGBlock* CFGBuilder::VisitCXXCatchStmt(CXXCatchStmt* CS) { 16995d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // CXXCatchStmt are treated like labels, so they are the first statement in a 17005d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // block. 17015d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17025d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (CS->getHandlerBlock()) 17035d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump addStmt(CS->getHandlerBlock()); 17045d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17055d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CFGBlock* CatchBlock = Block; 17065d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!CatchBlock) 17075d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock = createBlock(); 17085d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17095d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump CatchBlock->setLabel(CS); 17105d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17115d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump if (!FinishBlock(CatchBlock)) 17125d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return 0; 17135d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17145d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump // We set Block to NULL to allow lazy creation of a new block (if necessary) 17155d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump Block = NULL; 17165d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 17175d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump return CatchBlock; 17185d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump} 17195d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1720c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing XuCFGBlock *CFGBuilder::VisitCXXMemberCallExpr(CXXMemberCallExpr *C, 1721c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu AddStmtChoice asc) { 1722c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu AddStmtChoice asc2 = asc.asLValue() ? AddStmtChoice::AlwaysAddAsLValue 1723c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu : AddStmtChoice::AlwaysAdd; 1724c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu autoCreateBlock(); 1725c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu AppendStmt(Block, C, asc2); 1726c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu return VisitChildren(C); 1727c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu} 1728c5354a2ecd9fdd7f2c0eb784f7932fb5126e2a01Zhongxing Xu 172919bb356317952445b03ee341c02f6147083c9eeaTed KremenekCFGBlock* CFGBuilder::VisitIndirectGotoStmt(IndirectGotoStmt* I) { 17306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Lazily create the indirect-goto dispatch block if there isn't one already. 173119bb356317952445b03ee341c02f6147083c9eeaTed Kremenek CFGBlock* IBlock = cfg->getIndirectGotoBlock(); 17326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 173319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek if (!IBlock) { 173419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek IBlock = createBlock(false); 173519bb356317952445b03ee341c02f6147083c9eeaTed Kremenek cfg->setIndirectGotoBlock(IBlock); 173619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek } 17376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 173819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // IndirectGoto is a control-flow statement. Thus we stop processing the 173919bb356317952445b03ee341c02f6147083c9eeaTed Kremenek // current block and create a new one. 17404f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek if (Block && !FinishBlock(Block)) 17414f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek return 0; 17424f88063677a2d990a44bb0d5f8437d2498b91d7fTed Kremenek 174319bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block = createBlock(false); 174419bb356317952445b03ee341c02f6147083c9eeaTed Kremenek Block->setTerminator(I); 1745ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek AddSuccessor(Block, IBlock); 174619bb356317952445b03ee341c02f6147083c9eeaTed Kremenek return addStmt(I->getTarget()); 174719bb356317952445b03ee341c02f6147083c9eeaTed Kremenek} 174819bb356317952445b03ee341c02f6147083c9eeaTed Kremenek 1749befef2f69759d7338e2b7c5ce6c8b6f47fe6e667Ted Kremenek} // end anonymous namespace 1750026473c2175424a039f51ca8949937268721b965Ted Kremenek 17516d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// createBlock - Constructs and adds a new CFGBlock to the CFG. The block has 17526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// no successors or predecessors. If this is the first block created in the 17536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump/// CFG, it is automatically set to be the Entry and Exit of the CFG. 17549438252ad2ecae5338df565ca33c6969e4fbfa41Ted KremenekCFGBlock* CFG::createBlock() { 1755026473c2175424a039f51ca8949937268721b965Ted Kremenek bool first_block = begin() == end(); 1756026473c2175424a039f51ca8949937268721b965Ted Kremenek 1757026473c2175424a039f51ca8949937268721b965Ted Kremenek // Create the block. 1758ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek CFGBlock *Mem = getAllocator().Allocate<CFGBlock>(); 1759ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek new (Mem) CFGBlock(NumBlockIDs++, BlkBVC); 1760ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Blocks.push_back(Mem, BlkBVC); 1761026473c2175424a039f51ca8949937268721b965Ted Kremenek 1762026473c2175424a039f51ca8949937268721b965Ted Kremenek // If this is the first block, set it as the Entry and Exit. 1763ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (first_block) 1764ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Entry = Exit = &back(); 1765026473c2175424a039f51ca8949937268721b965Ted Kremenek 1766026473c2175424a039f51ca8949937268721b965Ted Kremenek // Return the block. 1767ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek return &back(); 1768026473c2175424a039f51ca8949937268721b965Ted Kremenek} 1769026473c2175424a039f51ca8949937268721b965Ted Kremenek 1770026473c2175424a039f51ca8949937268721b965Ted Kremenek/// buildCFG - Constructs a CFG from an AST. Ownership of the returned 1771026473c2175424a039f51ca8949937268721b965Ted Kremenek/// CFG is returned to the caller. 1772b978a441c7d8bf59e7fede938e1f3b672573b443Mike StumpCFG* CFG::buildCFG(const Decl *D, Stmt* Statement, ASTContext *C, 17734c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump bool AddEHEdges, bool AddScopes) { 1774fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek CFGBuilder Builder; 17754c45aa1b00b91847acfb082acfaced3ffa294d1dMike Stump return Builder.buildCFG(D, Statement, C, AddEHEdges, AddScopes); 1776fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek} 1777fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 177863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 177963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek// CFG: Queries for BlkExprs. 178063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek//===----------------------------------------------------------------------===// 178163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 178263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremeneknamespace { 178386946745225096243f6969dc745267b78fc211a6Ted Kremenek typedef llvm::DenseMap<const Stmt*,unsigned> BlkExprMapTy; 178463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 178563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 17868a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenekstatic void FindSubExprAssignments(Stmt *S, 17878a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek llvm::SmallPtrSet<Expr*,50>& Set) { 17888a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!S) 178933d4aab80f31bd06257526fe2883ea920529456bTed Kremenek return; 17906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 17918a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek for (Stmt::child_iterator I=S->child_begin(), E=S->child_end(); I!=E; ++I) { 17928a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek Stmt *child = *I; 17938a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (!child) 17948a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek continue; 17958a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek 17968a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(child)) 179733d4aab80f31bd06257526fe2883ea920529456bTed Kremenek if (B->isAssignmentOp()) Set.insert(B); 17986d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 17998a69366a1cd8fe1e9fd312048c0d5ce58eabeeb2Ted Kremenek FindSubExprAssignments(child, Set); 180033d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 180133d4aab80f31bd06257526fe2883ea920529456bTed Kremenek} 180233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek 180363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekstatic BlkExprMapTy* PopulateBlkExprMap(CFG& cfg) { 180463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = new BlkExprMapTy(); 18056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Look for assignments that are used as subexpressions. These are the only 18076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // assignments that we want to *possibly* register as a block-level 18086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression. Basically, if an assignment occurs both in a subexpression and 18096d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // at the block-level, it is a block-level expression. 181033d4aab80f31bd06257526fe2883ea920529456bTed Kremenek llvm::SmallPtrSet<Expr*,50> SubExprAssignments; 18116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 181263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) 1813ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 181433d4aab80f31bd06257526fe2883ea920529456bTed Kremenek FindSubExprAssignments(*BI, SubExprAssignments); 181586946745225096243f6969dc745267b78fc211a6Ted Kremenek 1816411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) { 18176d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18186d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Iterate over the statements again on identify the Expr* and Stmt* at the 18196d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // block-level that are block-level expressions. 1820411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 1821ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) 1822411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (Expr* Exp = dyn_cast<Expr>(*BI)) { 18236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1824411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(Exp)) { 182533d4aab80f31bd06257526fe2883ea920529456bTed Kremenek // Assignment expressions that are not nested within another 18266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // expression are really "statements" whose value is never used by 18276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // another expression. 1828411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (B->isAssignmentOp() && !SubExprAssignments.count(Exp)) 182933d4aab80f31bd06257526fe2883ea920529456bTed Kremenek continue; 18306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } else if (const StmtExpr* Terminator = dyn_cast<StmtExpr>(Exp)) { 18316d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // Special handling for statement expressions. The last statement in 18326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump // the statement expression is also a block-level expr. 1833411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek const CompoundStmt* C = Terminator->getSubStmt(); 183486946745225096243f6969dc745267b78fc211a6Ted Kremenek if (!C->body_empty()) { 183533d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 183686946745225096243f6969dc745267b78fc211a6Ted Kremenek (*M)[C->body_back()] = x; 183786946745225096243f6969dc745267b78fc211a6Ted Kremenek } 183886946745225096243f6969dc745267b78fc211a6Ted Kremenek } 1839e2dcd783a04f654c50bd8b13fb08a440afbd67e7Ted Kremenek 184033d4aab80f31bd06257526fe2883ea920529456bTed Kremenek unsigned x = M->size(); 1841411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek (*M)[Exp] = x; 184233d4aab80f31bd06257526fe2883ea920529456bTed Kremenek } 18436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1844411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek // Look at terminators. The condition is a block-level expression. 18456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1846ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek Stmt* S = (*I)->getTerminatorCondition(); 18476d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1848390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek if (S && M->find(S) == M->end()) { 1849411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek unsigned x = M->size(); 1850390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek (*M)[S] = x; 1851411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 1852411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 18536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 185486946745225096243f6969dc745267b78fc211a6Ted Kremenek return M; 185563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 185663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 185786946745225096243f6969dc745267b78fc211a6Ted KremenekCFG::BlkExprNumTy CFG::getBlkExprNum(const Stmt* S) { 185886946745225096243f6969dc745267b78fc211a6Ted Kremenek assert(S != NULL); 185963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (!BlkExprMap) { BlkExprMap = (void*) PopulateBlkExprMap(*this); } 18606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 186163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMapTy* M = reinterpret_cast<BlkExprMapTy*>(BlkExprMap); 186286946745225096243f6969dc745267b78fc211a6Ted Kremenek BlkExprMapTy::iterator I = M->find(S); 18633fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek return (I == M->end()) ? CFG::BlkExprNumTy() : CFG::BlkExprNumTy(I->second); 186463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 18657dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 186663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenekunsigned CFG::getNumBlkExprs() { 186763f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek if (const BlkExprMapTy* M = reinterpret_cast<const BlkExprMapTy*>(BlkExprMap)) 186863f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return M->size(); 186963f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek else { 187063f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // We assume callers interested in the number of BlkExprs will want 187163f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek // the map constructed if it doesn't already exist. 187263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek BlkExprMap = (void*) PopulateBlkExprMap(*this); 187363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek return reinterpret_cast<BlkExprMapTy*>(BlkExprMap)->size(); 187463f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek } 187563f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 187663f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek 1877274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1878274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek// Cleanup: CFG dstor. 1879274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek//===----------------------------------------------------------------------===// 1880274f4334f6dd35239e5c3d4b86198f7f5804b059Ted Kremenek 188163f5887f316fb52d243fcbb3631c039de6c4b993Ted KremenekCFG::~CFG() { 188263f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek delete reinterpret_cast<const BlkExprMapTy*>(BlkExprMap); 188363f5887f316fb52d243fcbb3631c039de6c4b993Ted Kremenek} 18846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 18857dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 18867dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG pretty printing 18877dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 18887dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 188942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremeneknamespace { 18902bac4ea765a4a6e1f6149964663f62d4bca6743bTed Kremenek 1891ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass StmtPrinterHelper : public PrinterHelper { 189242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek typedef llvm::DenseMap<Stmt*,std::pair<unsigned,unsigned> > StmtMapTy; 189342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtMapTy StmtMap; 189442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek signed CurrentBlock; 189542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned CurrentStmt; 1896e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LangOpts; 189742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenekpublic: 18981c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek 1899e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper(const CFG* cfg, const LangOptions &LO) 1900e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner : CurrentBlock(0), CurrentStmt(0), LangOpts(LO) { 190142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFG::const_iterator I = cfg->begin(), E = cfg->end(); I != E; ++I ) { 190242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek unsigned j = 1; 1903ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek for (CFGBlock::const_iterator BI = (*I)->begin(), BEnd = (*I)->end() ; 190442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek BI != BEnd; ++BI, ++j ) 1905ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek StmtMap[*BI] = std::make_pair((*I)->getBlockID(),j); 190642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 1907fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 19086d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 190942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek virtual ~StmtPrinterHelper() {} 19106d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1911e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &getLangOpts() const { return LangOpts; } 191242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setBlockID(signed i) { CurrentBlock = i; } 191342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek void setStmtID(unsigned i) { CurrentStmt = i; } 19146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1915a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek virtual bool handledStmt(Stmt* Terminator, llvm::raw_ostream& OS) { 19166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1917411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek StmtMapTy::iterator I = StmtMap.find(Terminator); 1918fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek 191942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (I == StmtMap.end()) 192042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19216d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19226d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump if (CurrentBlock >= 0 && I->second.first == (unsigned) CurrentBlock 19233fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek && I->second.second == CurrentStmt) { 192442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek return false; 19253fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek } 19266d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19273fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "[B" << I->second.first << "." << I->second.second << "]"; 19281c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return true; 192942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 193042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek}; 1931e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 1932e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 1933e8ee26b49d68ae3ffdf9a990ff7511ef55afa04cTed Kremenek 1934e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnernamespace { 1935ba5fb5a955c896815c439289fc51c03cf0635129Kovarththanan Rajaratnamclass CFGBlockTerminatorPrint 19366fa9b88e2c3d47d606a273df2f8d03509bcff0b9Ted Kremenek : public StmtVisitor<CFGBlockTerminatorPrint,void> { 19376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1938a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_ostream& OS; 193942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek StmtPrinterHelper* Helper; 1940d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor PrintingPolicy Policy; 1941d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenekpublic: 1942d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor CFGBlockTerminatorPrint(llvm::raw_ostream& os, StmtPrinterHelper* helper, 1943e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const PrintingPolicy &Policy) 1944d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor : OS(os), Helper(helper), Policy(Policy) {} 19456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1946d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitIfStmt(IfStmt* I) { 1947d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "if "; 1948d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getCond()->printPretty(OS,Helper,Policy); 1949d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 19506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1951d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek // Default case. 19526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump void VisitStmt(Stmt* Terminator) { 19536d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump Terminator->printPretty(OS, Helper, Policy); 19546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 19556d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1956d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitForStmt(ForStmt* F) { 1957d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "for (" ; 19583fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInit()) 19593fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 1960535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 19613fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = F->getCond()) 19623fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 1963535bb20b6e252809bc17cc59b5d71b5e5e549e70Ted Kremenek OS << "; "; 19643fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (F->getInc()) 19653fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek OS << "..."; 1966a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << ")"; 1967d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 19686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1969d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitWhileStmt(WhileStmt* W) { 1970d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "while " ; 19713fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = W->getCond()) 19723fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 1973d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek } 19746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1975d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek void VisitDoStmt(DoStmt* D) { 1976d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek OS << "do ... while "; 19773fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek if (Stmt* C = D->getCond()) 19783fa1e4b27300a4ea4cf273182d4b6427ef87f3f8Ted Kremenek C->printPretty(OS, Helper, Policy); 19799da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 19806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1981411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek void VisitSwitchStmt(SwitchStmt* Terminator) { 19829da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek OS << "switch "; 1983d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor Terminator->getCond()->printPretty(OS, Helper, Policy); 19849da2fb773c473b989c78c513c5ce61641e9bbb4dTed Kremenek } 19856d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 19865d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump void VisitCXXTryStmt(CXXTryStmt* CS) { 19875d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "try ..."; 19885d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } 19895d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 1990805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitConditionalOperator(ConditionalOperator* C) { 1991d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 19926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << " ? ... : ..."; 1993805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 19946d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 1995aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek void VisitChooseExpr(ChooseExpr* C) { 1996aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek OS << "__builtin_choose_expr( "; 1997d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor C->getCond()->printPretty(OS, Helper, Policy); 1998a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " )"; 1999aeddbf689eb3e3afca5117ca83c7b2e18260b0d8Ted Kremenek } 20006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20011c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek void VisitIndirectGotoStmt(IndirectGotoStmt* I) { 20021c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "goto *"; 2003d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor I->getTarget()->printPretty(OS, Helper, Policy); 20041c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20056d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2006805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek void VisitBinaryOperator(BinaryOperator* B) { 2007805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek if (!B->isLogicalOp()) { 2008805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek VisitExpr(B); 2009805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2010805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20116d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2012d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor B->getLHS()->printPretty(OS, Helper, Policy); 20136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2014805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek switch (B->getOpcode()) { 2015805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek case BinaryOperator::LOr: 2016a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " || ..."; 2017805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2018805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek case BinaryOperator::LAnd: 2019a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << " && ..."; 2020805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek return; 2021805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek default: 2022805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek assert(false && "Invalid logical operator."); 20236d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2024805e9a8300af9489ec13cd804c070267b7c4cfecTed Kremenek } 20256d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20260b1d9b7557437176f9cea1283bfac2510812beceTed Kremenek void VisitExpr(Expr* E) { 2027d249e1d1f1498b81314459ceda19d6ff25c278adDouglas Gregor E->printPretty(OS, Helper, Policy); 20286d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 2029d4fdee35477e439759eea5f67ea03ff0c570fabaTed Kremenek}; 2030e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} // end anonymous namespace 2031e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner 20326d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2033e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_stmt(llvm::raw_ostream &OS, StmtPrinterHelper* Helper, 2034079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump const CFGElement &E) { 2035079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump Stmt *Terminator = E; 2036079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 2037079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (E.asStartScope()) { 2038079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump OS << "start scope\n"; 2039079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return; 2040079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 2041079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (E.asEndScope()) { 2042079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump OS << "end scope\n"; 2043079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump return; 2044079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } 2045079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump 20461c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Helper) { 20471c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for statement-expressions. 2048411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (StmtExpr* SE = dyn_cast<StmtExpr>(Terminator)) { 20491c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek CompoundStmt* Sub = SE->getSubStmt(); 20506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20511c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (Sub->child_begin() != Sub->child_end()) { 205260266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << "({ ... ; "; 20537a9d9d71fa208dc23fd67d03ce052d4ef60a8d04Ted Kremenek Helper->handledStmt(*SE->getSubStmt()->body_rbegin(),OS); 205460266e8a9a4cd941af5e0006a18377dc03f0421bTed Kremenek OS << " })\n"; 20551c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 20561c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20571c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20586d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20591c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // special printing for comma expressions. 2060411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (BinaryOperator* B = dyn_cast<BinaryOperator>(Terminator)) { 20611c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek if (B->getOpcode() == BinaryOperator::Comma) { 20621c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << "... , "; 20631c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek Helper->handledStmt(B->getRHS(),OS); 20641c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek OS << '\n'; 20651c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek return; 20666d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 20676d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump } 20681c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek } 20696d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2070e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner Terminator->printPretty(OS, Helper, PrintingPolicy(Helper->getLangOpts())); 20716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20721c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek // Expressions need a newline. 2073411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (isa<Expr>(Terminator)) OS << '\n'; 20741c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek} 20756d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2076e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnerstatic void print_block(llvm::raw_ostream& OS, const CFG* cfg, 2077e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const CFGBlock& B, 2078e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper* Helper, bool print_edges) { 20796d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 208042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(B.getBlockID()); 20816d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20827dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Print the header. 20836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump OS << "\n [ B" << B.getBlockID(); 20846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 208542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (&B == &cfg->getEntry()) 208642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (ENTRY) ]\n"; 208742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == &cfg->getExit()) 208842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " (EXIT) ]\n"; 208942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else if (&B == cfg->getIndirectGotoBlock()) 20907dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OS << " (INDIRECT GOTO DISPATCH) ]\n"; 209142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek else 209242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " ]\n"; 20936d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 20949cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the label of this block. 2095079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (Stmt* Label = const_cast<Stmt*>(B.getLabel())) { 209642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 209742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 209842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 20996d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2100079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump if (LabelStmt* L = dyn_cast<LabelStmt>(Label)) 21019cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << L->getName(); 2102079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CaseStmt* C = dyn_cast<CaseStmt>(Label)) { 21039cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "case "; 2104e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getLHS()->printPretty(OS, Helper, 2105e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21069cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (C->getRHS()) { 21079cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " ... "; 2108e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner C->getRHS()->printPretty(OS, Helper, 2109e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 21109cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 2111079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump } else if (isa<DefaultStmt>(Label)) 21129cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "default"; 2113079bd72439448b78629a28da6b1f8abe2cdeaf4dMike Stump else if (CXXCatchStmt *CS = dyn_cast<CXXCatchStmt>(Label)) { 21145d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << "catch ("; 2115a1f93631a84621d77aeb627691da85a8991af188Mike Stump if (CS->getExceptionDecl()) 2116a1f93631a84621d77aeb627691da85a8991af188Mike Stump CS->getExceptionDecl()->print(OS, PrintingPolicy(Helper->getLangOpts()), 2117a1f93631a84621d77aeb627691da85a8991af188Mike Stump 0); 2118a1f93631a84621d77aeb627691da85a8991af188Mike Stump else 2119a1f93631a84621d77aeb627691da85a8991af188Mike Stump OS << "..."; 21205d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump OS << ")"; 21215d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump 21225d1d20227878cd03db8b2dd23efd4cedfe874feeMike Stump } else 212342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek assert(false && "Invalid label statement in CFGBlock."); 21246d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21259cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << ":\n"; 21269cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 21276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2128fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek // Iterate through the statements in the block and print them. 2129fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek unsigned j = 1; 21306d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 213142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_iterator I = B.begin(), E = B.end() ; 213242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E ; ++I, ++j ) { 21336d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21349cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the statement # in the basic block and the statement itself. 213542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 213642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 21376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2138a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek OS << llvm::format("%3d", j) << ": "; 21396d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 214042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) 214142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek Helper->setStmtID(j); 21426d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21431c29bba6da40bbe59fb1f81c4cd5ab5471554ffeTed Kremenek print_stmt(OS,Helper,*I); 2144fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 21456d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21469cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the terminator of this block. 214742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (B.getTerminator()) { 214842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (print_edges) 214942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " "; 21506d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21519cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " T: "; 21526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 215342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (Helper) Helper->setBlockID(-1); 21546d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2155e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, Helper, 2156e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner PrintingPolicy(Helper->getLangOpts())); 215742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek TPrinter.Visit(const_cast<Stmt*>(B.getTerminator())); 2158a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek OS << '\n'; 2159fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 21606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21619cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek if (print_edges) { 21629cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the predecessors of this block. 216342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Predecessors (" << B.pred_size() << "):"; 21649cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek unsigned i = 0; 216542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 216642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_pred_iterator I = B.pred_begin(), E = B.pred_end(); 216742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 21686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 216942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) == 0) 21709cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 21716d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21729cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << " B" << (*I)->getBlockID(); 21739cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek } 21746d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21759cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 21766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21779cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek // Print the successors of this block. 217842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek OS << " Successors (" << B.succ_size() << "):"; 21799cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek i = 0; 218042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 218142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (CFGBlock::const_succ_iterator I = B.succ_begin(), E = B.succ_end(); 218242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek I != E; ++I, ++i) { 21836d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 218442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek if (i == 8 || (i-8) % 10 == 0) 21859cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << "\n "; 218642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2187e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump if (*I) 2188e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " B" << (*I)->getBlockID(); 2189e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump else 2190e5af3ce53ec58995b09381ba645ab2117a46647bMike Stump OS << " NULL"; 2191fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 21926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 21939cffe7366ea3beb33c2d58f43a8c3a04c1873e11Ted Kremenek OS << '\n'; 2194fddd51853f8ccaa1df2476376e6fd74d2f315c73Ted Kremenek } 21956d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 219642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 219742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 219842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simple pretty printer of a CFG that outputs to stderr. 2199e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::dump(const LangOptions &LO) const { print(llvm::errs(), LO); } 220042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 220142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFG that outputs to an ostream. 2202e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::print(llvm::raw_ostream &OS, const LangOptions &LO) const { 2203e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(this, LO); 22046d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 220542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the entry block. 220642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getEntry(), &Helper, true); 22076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 220842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Iterate through the CFGBlocks and print them one by one. 220942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek for (const_iterator I = Blocks.begin(), E = Blocks.end() ; I != E ; ++I) { 221042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Skip the entry block, because we already printed it. 2211ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek if (&(**I) == &getEntry() || &(**I) == &getExit()) 221242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek continue; 22136d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2214ee82d9bdc5025b82de8ce2a4ad4685e0a8b79da9Ted Kremenek print_block(OS, this, **I, &Helper, true); 221542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek } 22166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 221742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek // Print the exit block. 221842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, this, getExit(), &Helper, true); 2219d0172439194b28bae62a94a0a25d58e6d21e7a14Ted Kremenek OS.flush(); 22206d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump} 222142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 222242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// dump - A simply pretty printer of a CFGBlock that outputs to stderr. 2223e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::dump(const CFG* cfg, const LangOptions &LO) const { 2224e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner print(llvm::errs(), cfg, LO); 2225e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner} 222642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 222742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// print - A simple pretty printer of a CFGBlock that outputs to an ostream. 222842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek/// Generally this will only be called from CFG::print. 2229e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::print(llvm::raw_ostream& OS, const CFG* cfg, 2230e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner const LangOptions &LO) const { 2231e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper Helper(cfg, LO); 223242a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(OS, cfg, *this, &Helper, true); 2233026473c2175424a039f51ca8949937268721b965Ted Kremenek} 22347dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2235a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek/// printTerminator - A simple pretty printer of the terminator of a CFGBlock. 2236e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFGBlock::printTerminator(llvm::raw_ostream &OS, 22376d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump const LangOptions &LO) const { 2238e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner CFGBlockTerminatorPrint TPrinter(OS, NULL, PrintingPolicy(LO)); 2239a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek TPrinter.Visit(const_cast<Stmt*>(getTerminator())); 2240a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek} 2241a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 2242390e48b15ad93f85bfd1e33b9992c198fa0db475Ted KremenekStmt* CFGBlock::getTerminatorCondition() { 22436d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2244411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek if (!Terminator) 2245411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return NULL; 22466d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2247411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek Expr* E = NULL; 22486d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2249411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek switch (Terminator->getStmtClass()) { 2250411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek default: 2251411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22526d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2253411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ForStmtClass: 2254411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ForStmt>(Terminator)->getCond(); 2255411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22566d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2257411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::WhileStmtClass: 2258411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<WhileStmt>(Terminator)->getCond(); 2259411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22606d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2261411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::DoStmtClass: 2262411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<DoStmt>(Terminator)->getCond(); 2263411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22646d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2265411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IfStmtClass: 2266411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IfStmt>(Terminator)->getCond(); 2267411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22686d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2269411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ChooseExprClass: 2270411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ChooseExpr>(Terminator)->getCond(); 2271411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22726d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2273411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::IndirectGotoStmtClass: 2274411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<IndirectGotoStmt>(Terminator)->getTarget(); 2275411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22766d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2277411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::SwitchStmtClass: 2278411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<SwitchStmt>(Terminator)->getCond(); 2279411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22806d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2281411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::ConditionalOperatorClass: 2282411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<ConditionalOperator>(Terminator)->getCond(); 2283411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek break; 22846d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2285411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek case Stmt::BinaryOperatorClass: // '&&' and '||' 2286411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek E = cast<BinaryOperator>(Terminator)->getLHS(); 2287390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek break; 22886d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2289390e48b15ad93f85bfd1e33b9992c198fa0db475Ted Kremenek case Stmt::ObjCForCollectionStmtClass: 22906d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return Terminator; 2291411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek } 22926d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 2293411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek return E ? E->IgnoreParens() : NULL; 2294411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek} 2295411cdee0b490f79428c9eb977f25199eb7d21cd8Ted Kremenek 22969c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenekbool CFGBlock::hasBinaryBranchTerminator() const { 22976d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 22989c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek if (!Terminator) 22999c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23006d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23019c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek Expr* E = NULL; 23026d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23039c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek switch (Terminator->getStmtClass()) { 23049c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek default: 23059c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return false; 23066d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23076d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump case Stmt::ForStmtClass: 23089c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::WhileStmtClass: 23099c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::DoStmtClass: 23109c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::IfStmtClass: 23119c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ChooseExprClass: 23129c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::ConditionalOperatorClass: 23139c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek case Stmt::BinaryOperatorClass: 23146d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump return true; 23159c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek } 23166d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23179c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek return E ? E->IgnoreParens() : NULL; 23189c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek} 23199c2535a35db35b3a821a0d0c36a01a16f52f1ad0Ted Kremenek 2320a292585207adbf6dcf6347db3526a7ec861d8eacTed Kremenek 23217dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23227dba8607e59096014b7139ff20ef00870041d518Ted Kremenek// CFG Graphviz Visualization 23237dba8607e59096014b7139ff20ef00870041d518Ted Kremenek//===----------------------------------------------------------------------===// 23247dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 232542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 232642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 23276d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stumpstatic StmtPrinterHelper* GraphHelper; 232842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 232942a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 2330e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattnervoid CFG::viewCFG(const LangOptions &LO) const { 233142a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#ifndef NDEBUG 2332e4f2142d00fa5fdb580c4e2413da91882d955381Chris Lattner StmtPrinterHelper H(this, LO); 233342a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = &H; 233442a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek llvm::ViewGraph(this,"CFG"); 233542a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek GraphHelper = NULL; 233642a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek#endif 233742a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek} 233842a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek 23397dba8607e59096014b7139ff20ef00870041d518Ted Kremeneknamespace llvm { 23407dba8607e59096014b7139ff20ef00870041d518Ted Kremenektemplate<> 23417dba8607e59096014b7139ff20ef00870041d518Ted Kremenekstruct DOTGraphTraits<const CFG*> : public DefaultDOTGraphTraits { 2342006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2343006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} 2344006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser 2345006b0eb3e11162d8c06372db813ac9f71a7a16e8Tobias Grosser static std::string getNodeLabel(const CFGBlock* Node, const CFG* Graph) { 23467dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 2347bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#ifndef NDEBUG 2348a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string OutSStr; 2349a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek llvm::raw_string_ostream Out(OutSStr); 235042a509f6a4f71bb805cc4abbb26722a34dffdddeTed Kremenek print_block(Out,Graph, *Node, GraphHelper, false); 2351a95d3750441ac8ad03e36af8e6e74039c9a3109dTed Kremenek std::string& OutStr = Out.str(); 23527dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 23537dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); 23547dba8607e59096014b7139ff20ef00870041d518Ted Kremenek 23557dba8607e59096014b7139ff20ef00870041d518Ted Kremenek // Process string output to make it nicer... 23567dba8607e59096014b7139ff20ef00870041d518Ted Kremenek for (unsigned i = 0; i != OutStr.length(); ++i) 23577dba8607e59096014b7139ff20ef00870041d518Ted Kremenek if (OutStr[i] == '\n') { // Left justify 23587dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr[i] = '\\'; 23597dba8607e59096014b7139ff20ef00870041d518Ted Kremenek OutStr.insert(OutStr.begin()+i+1, 'l'); 23607dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 23616d9828c82c9321f042ab416fd2ffaa3034347d45Mike Stump 23627dba8607e59096014b7139ff20ef00870041d518Ted Kremenek return OutStr; 2363bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#else 2364bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser return ""; 2365bd250b44d60622e7c0b60c6def6f6fe7e347addfHartmut Kaiser#endif 23667dba8607e59096014b7139ff20ef00870041d518Ted Kremenek } 23677dba8607e59096014b7139ff20ef00870041d518Ted Kremenek}; 23687dba8607e59096014b7139ff20ef00870041d518Ted Kremenek} // end namespace llvm 2369