Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 1 | //===--- CFG.cpp - Classes for representing and building CFGs----*- C++ -*-===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file defines the CFG and CFGBuilder classes for representing and |
| 11 | // building Control-Flow Graphs (CFGs) from ASTs. |
| 12 | // |
| 13 | //===----------------------------------------------------------------------===// |
| 14 | |
Ted Kremenek | bd04878 | 2009-07-22 21:45:16 +0000 | [diff] [blame] | 15 | #include "clang/Analysis/Support/SaveAndRestore.h" |
Ted Kremenek | e41611a | 2009-07-16 18:13:04 +0000 | [diff] [blame] | 16 | #include "clang/Analysis/CFG.h" |
Mike Stump | b978a44 | 2010-01-21 02:21:40 +0000 | [diff] [blame] | 17 | #include "clang/AST/DeclCXX.h" |
Ted Kremenek | c310e93 | 2007-08-21 22:06:14 +0000 | [diff] [blame] | 18 | #include "clang/AST/StmtVisitor.h" |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 19 | #include "clang/AST/PrettyPrinter.h" |
Benjamin Kramer | 6cb7c1a | 2009-08-23 12:08:50 +0000 | [diff] [blame] | 20 | #include "llvm/Support/GraphWriter.h" |
Benjamin Kramer | 6cb7c1a | 2009-08-23 12:08:50 +0000 | [diff] [blame] | 21 | #include "llvm/Support/Allocator.h" |
| 22 | #include "llvm/Support/Format.h" |
Ted Kremenek | 0cebe3e | 2007-08-21 23:26:17 +0000 | [diff] [blame] | 23 | #include "llvm/ADT/DenseMap.h" |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 24 | #include "llvm/ADT/SmallPtrSet.h" |
Ted Kremenek | 0ba497b | 2009-10-20 23:46:25 +0000 | [diff] [blame] | 25 | #include "llvm/ADT/OwningPtr.h" |
Ted Kremenek | 83c01da | 2008-01-11 00:40:29 +0000 | [diff] [blame] | 26 | |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 27 | using namespace clang; |
| 28 | |
| 29 | namespace { |
| 30 | |
Douglas Gregor | 4afa39d | 2009-01-20 01:17:11 +0000 | [diff] [blame] | 31 | static SourceLocation GetEndLoc(Decl* D) { |
Ted Kremenek | c7eb903 | 2008-08-06 23:20:50 +0000 | [diff] [blame] | 32 | if (VarDecl* VD = dyn_cast<VarDecl>(D)) |
| 33 | if (Expr* Ex = VD->getInit()) |
| 34 | return Ex->getSourceRange().getEnd(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 35 | |
| 36 | return D->getLocation(); |
Ted Kremenek | c7eb903 | 2008-08-06 23:20:50 +0000 | [diff] [blame] | 37 | } |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 38 | |
| 39 | class AddStmtChoice { |
| 40 | public: |
| 41 | enum Kind { NotAlwaysAdd = 0, AlwaysAdd, AlwaysAddAsLValue }; |
| 42 | public: |
| 43 | AddStmtChoice(Kind kind) : k(kind) {} |
| 44 | bool alwaysAdd() const { return k != NotAlwaysAdd; } |
| 45 | bool asLValue() const { return k == AlwaysAddAsLValue; } |
| 46 | private: |
| 47 | Kind k; |
| 48 | }; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 49 | |
Ted Kremenek | a34ea07 | 2008-08-04 22:51:42 +0000 | [diff] [blame] | 50 | /// CFGBuilder - This class implements CFG construction from an AST. |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 51 | /// The builder is stateful: an instance of the builder should be used to only |
| 52 | /// construct a single CFG. |
| 53 | /// |
| 54 | /// Example usage: |
| 55 | /// |
| 56 | /// CFGBuilder builder; |
| 57 | /// CFG* cfg = builder.BuildAST(stmt1); |
| 58 | /// |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 59 | /// CFG construction is done via a recursive walk of an AST. We actually parse |
| 60 | /// the AST in reverse order so that the successor of a basic block is |
| 61 | /// constructed prior to its predecessor. This allows us to nicely capture |
| 62 | /// implicit fall-throughs without extra basic blocks. |
Ted Kremenek | c310e93 | 2007-08-21 22:06:14 +0000 | [diff] [blame] | 63 | /// |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 64 | class CFGBuilder { |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 65 | ASTContext *Context; |
Ted Kremenek | 0ba497b | 2009-10-20 23:46:25 +0000 | [diff] [blame] | 66 | llvm::OwningPtr<CFG> cfg; |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 67 | |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 68 | CFGBlock* Block; |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 69 | CFGBlock* Succ; |
Ted Kremenek | bf15b27 | 2007-08-22 21:36:54 +0000 | [diff] [blame] | 70 | CFGBlock* ContinueTargetBlock; |
Ted Kremenek | 8a29471 | 2007-08-22 21:51:58 +0000 | [diff] [blame] | 71 | CFGBlock* BreakTargetBlock; |
Ted Kremenek | b5c13b0 | 2007-08-23 18:43:24 +0000 | [diff] [blame] | 72 | CFGBlock* SwitchTerminatedBlock; |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 73 | CFGBlock* DefaultCaseBlock; |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 74 | CFGBlock* TryTerminatedBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 75 | |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 76 | // LabelMap records the mapping from Label expressions to their blocks. |
Ted Kremenek | 0cebe3e | 2007-08-21 23:26:17 +0000 | [diff] [blame] | 77 | typedef llvm::DenseMap<LabelStmt*,CFGBlock*> LabelMapTy; |
| 78 | LabelMapTy LabelMap; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 79 | |
| 80 | // A list of blocks that end with a "goto" that must be backpatched to their |
| 81 | // resolved targets upon completion of CFG construction. |
Ted Kremenek | 4a2b8a1 | 2007-08-22 15:40:58 +0000 | [diff] [blame] | 82 | typedef std::vector<CFGBlock*> BackpatchBlocksTy; |
Ted Kremenek | 0cebe3e | 2007-08-21 23:26:17 +0000 | [diff] [blame] | 83 | BackpatchBlocksTy BackpatchBlocks; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 84 | |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 85 | // A list of labels whose address has been taken (for indirect gotos). |
| 86 | typedef llvm::SmallPtrSet<LabelStmt*,5> LabelSetTy; |
| 87 | LabelSetTy AddressTakenLabels; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 88 | |
| 89 | public: |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 90 | explicit CFGBuilder() : cfg(new CFG()), // crew a new CFG |
| 91 | Block(NULL), Succ(NULL), |
Ted Kremenek | 8a29471 | 2007-08-22 21:51:58 +0000 | [diff] [blame] | 92 | ContinueTargetBlock(NULL), BreakTargetBlock(NULL), |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 93 | SwitchTerminatedBlock(NULL), DefaultCaseBlock(NULL), |
| 94 | TryTerminatedBlock(NULL) {} |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 95 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 96 | // buildCFG - Used by external clients to construct the CFG. |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 97 | CFG* buildCFG(const Decl *D, Stmt *Statement, ASTContext *C, bool AddEHEdges, |
| 98 | bool AddScopes); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 99 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 100 | private: |
| 101 | // Visitors to walk an AST and construct the CFG. |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 102 | CFGBlock *VisitAddrLabelExpr(AddrLabelExpr *A, AddStmtChoice asc); |
| 103 | CFGBlock *VisitBinaryOperator(BinaryOperator *B, AddStmtChoice asc); |
| 104 | CFGBlock *VisitBlockExpr(BlockExpr* E, AddStmtChoice asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 105 | CFGBlock *VisitBreakStmt(BreakStmt *B); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 106 | CFGBlock *VisitCallExpr(CallExpr *C, AddStmtChoice asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 107 | CFGBlock *VisitCaseStmt(CaseStmt *C); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 108 | CFGBlock *VisitChooseExpr(ChooseExpr *C, AddStmtChoice asc); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 109 | CFGBlock *VisitCompoundStmt(CompoundStmt *C); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 110 | CFGBlock *VisitConditionalOperator(ConditionalOperator *C, |
| 111 | AddStmtChoice asc); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 112 | CFGBlock *VisitContinueStmt(ContinueStmt *C); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 113 | CFGBlock *VisitCXXCatchStmt(CXXCatchStmt *S); |
Mike Stump | 0979d80 | 2009-07-22 22:56:04 +0000 | [diff] [blame] | 114 | CFGBlock *VisitCXXThrowExpr(CXXThrowExpr *T); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 115 | CFGBlock *VisitCXXTryStmt(CXXTryStmt *S); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 116 | CFGBlock *VisitDeclStmt(DeclStmt *DS); |
| 117 | CFGBlock *VisitDeclSubExpr(Decl* D); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 118 | CFGBlock *VisitDefaultStmt(DefaultStmt *D); |
| 119 | CFGBlock *VisitDoStmt(DoStmt *D); |
| 120 | CFGBlock *VisitForStmt(ForStmt *F); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 121 | CFGBlock *VisitGotoStmt(GotoStmt* G); |
| 122 | CFGBlock *VisitIfStmt(IfStmt *I); |
| 123 | CFGBlock *VisitIndirectGotoStmt(IndirectGotoStmt *I); |
| 124 | CFGBlock *VisitLabelStmt(LabelStmt *L); |
| 125 | CFGBlock *VisitObjCAtCatchStmt(ObjCAtCatchStmt *S); |
| 126 | CFGBlock *VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S); |
| 127 | CFGBlock *VisitObjCAtThrowStmt(ObjCAtThrowStmt *S); |
| 128 | CFGBlock *VisitObjCAtTryStmt(ObjCAtTryStmt *S); |
| 129 | CFGBlock *VisitObjCForCollectionStmt(ObjCForCollectionStmt *S); |
| 130 | CFGBlock *VisitReturnStmt(ReturnStmt* R); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 131 | CFGBlock *VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, AddStmtChoice asc); |
| 132 | CFGBlock *VisitStmtExpr(StmtExpr *S, AddStmtChoice asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 133 | CFGBlock *VisitSwitchStmt(SwitchStmt *S); |
| 134 | CFGBlock *VisitWhileStmt(WhileStmt *W); |
Mike Stump | cd7bf23 | 2009-07-17 01:04:31 +0000 | [diff] [blame] | 135 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 136 | CFGBlock *Visit(Stmt *S, AddStmtChoice asc = AddStmtChoice::NotAlwaysAdd); |
| 137 | CFGBlock *VisitStmt(Stmt *S, AddStmtChoice asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 138 | CFGBlock *VisitChildren(Stmt* S); |
Mike Stump | cd7bf23 | 2009-07-17 01:04:31 +0000 | [diff] [blame] | 139 | |
Ted Kremenek | 274f433 | 2008-04-28 18:00:46 +0000 | [diff] [blame] | 140 | // NYS == Not Yet Supported |
| 141 | CFGBlock* NYS() { |
Ted Kremenek | 4102af9 | 2008-03-13 03:04:22 +0000 | [diff] [blame] | 142 | badCFG = true; |
| 143 | return Block; |
| 144 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 145 | |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 146 | CFGBlock *StartScope(Stmt *S, CFGBlock *B) { |
| 147 | if (!AddScopes) |
| 148 | return B; |
| 149 | |
| 150 | if (B == 0) |
| 151 | B = createBlock(); |
| 152 | B->StartScope(S, cfg->getBumpVectorContext()); |
| 153 | return B; |
| 154 | } |
| 155 | |
| 156 | void EndScope(Stmt *S) { |
| 157 | if (!AddScopes) |
| 158 | return; |
| 159 | |
| 160 | if (Block == 0) |
| 161 | Block = createBlock(); |
| 162 | Block->EndScope(S, cfg->getBumpVectorContext()); |
| 163 | } |
| 164 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 165 | void autoCreateBlock() { if (!Block) Block = createBlock(); } |
| 166 | CFGBlock *createBlock(bool add_successor = true); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 167 | bool FinishBlock(CFGBlock* B); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 168 | CFGBlock *addStmt(Stmt *S, AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { |
| 169 | return Visit(S, asc); |
| 170 | } |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 171 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 172 | void AppendStmt(CFGBlock *B, Stmt *S, |
| 173 | AddStmtChoice asc = AddStmtChoice::AlwaysAdd) { |
| 174 | B->appendStmt(S, cfg->getBumpVectorContext(), asc.asLValue()); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | void AddSuccessor(CFGBlock *B, CFGBlock *S) { |
| 178 | B->addSuccessor(S, cfg->getBumpVectorContext()); |
| 179 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 180 | |
Ted Kremenek | fadc9ea | 2009-07-24 06:55:42 +0000 | [diff] [blame] | 181 | /// TryResult - a class representing a variant over the values |
| 182 | /// 'true', 'false', or 'unknown'. This is returned by TryEvaluateBool, |
| 183 | /// and is used by the CFGBuilder to decide if a branch condition |
| 184 | /// can be decided up front during CFG construction. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 185 | class TryResult { |
| 186 | int X; |
| 187 | public: |
| 188 | TryResult(bool b) : X(b ? 1 : 0) {} |
| 189 | TryResult() : X(-1) {} |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 190 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 191 | bool isTrue() const { return X == 1; } |
| 192 | bool isFalse() const { return X == 0; } |
| 193 | bool isKnown() const { return X >= 0; } |
| 194 | void negate() { |
| 195 | assert(isKnown()); |
| 196 | X ^= 0x1; |
| 197 | } |
| 198 | }; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 199 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 200 | /// TryEvaluateBool - Try and evaluate the Stmt and return 0 or 1 |
| 201 | /// if we can evaluate to a known value, otherwise return -1. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 202 | TryResult TryEvaluateBool(Expr *S) { |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 203 | Expr::EvalResult Result; |
Douglas Gregor | 9983cc1 | 2009-08-24 21:39:56 +0000 | [diff] [blame] | 204 | if (!S->isTypeDependent() && !S->isValueDependent() && |
| 205 | S->Evaluate(Result, *Context) && Result.Val.isInt()) |
Ted Kremenek | fadc9ea | 2009-07-24 06:55:42 +0000 | [diff] [blame] | 206 | return Result.Val.getInt().getBoolValue(); |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 207 | |
| 208 | return TryResult(); |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 209 | } |
| 210 | |
Ted Kremenek | 4102af9 | 2008-03-13 03:04:22 +0000 | [diff] [blame] | 211 | bool badCFG; |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 212 | |
| 213 | // True iff EH edges on CallExprs should be added to the CFG. |
| 214 | bool AddEHEdges; |
| 215 | |
| 216 | // True iff scope start and scope end notes should be added to the CFG. |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 217 | bool AddScopes; |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 218 | }; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 219 | |
Douglas Gregor | 898574e | 2008-12-05 23:32:09 +0000 | [diff] [blame] | 220 | // FIXME: Add support for dependent-sized array types in C++? |
| 221 | // Does it even make sense to build a CFG for an uninstantiated template? |
Ted Kremenek | 610a09e | 2008-09-26 22:58:57 +0000 | [diff] [blame] | 222 | static VariableArrayType* FindVA(Type* t) { |
| 223 | while (ArrayType* vt = dyn_cast<ArrayType>(t)) { |
| 224 | if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt)) |
| 225 | if (vat->getSizeExpr()) |
| 226 | return vat; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 227 | |
Ted Kremenek | 610a09e | 2008-09-26 22:58:57 +0000 | [diff] [blame] | 228 | t = vt->getElementType().getTypePtr(); |
| 229 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 230 | |
Ted Kremenek | 610a09e | 2008-09-26 22:58:57 +0000 | [diff] [blame] | 231 | return 0; |
| 232 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 233 | |
| 234 | /// BuildCFG - Constructs a CFG from an AST (a Stmt*). The AST can represent an |
| 235 | /// arbitrary statement. Examples include a single expression or a function |
| 236 | /// body (compound statement). The ownership of the returned CFG is |
| 237 | /// transferred to the caller. If CFG construction fails, this method returns |
| 238 | /// NULL. |
Mike Stump | b978a44 | 2010-01-21 02:21:40 +0000 | [diff] [blame] | 239 | CFG* CFGBuilder::buildCFG(const Decl *D, Stmt* Statement, ASTContext* C, |
Mike Stump | 55f988e | 2010-01-21 17:21:23 +0000 | [diff] [blame] | 240 | bool addehedges, bool AddScopes) { |
| 241 | AddEHEdges = addehedges; |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 242 | Context = C; |
Ted Kremenek | 0ba497b | 2009-10-20 23:46:25 +0000 | [diff] [blame] | 243 | assert(cfg.get()); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 244 | if (!Statement) |
| 245 | return NULL; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 246 | |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 247 | this->AddScopes = AddScopes; |
Ted Kremenek | 4102af9 | 2008-03-13 03:04:22 +0000 | [diff] [blame] | 248 | badCFG = false; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 249 | |
| 250 | // Create an empty block that will serve as the exit block for the CFG. Since |
| 251 | // this is the first block added to the CFG, it will be implicitly registered |
| 252 | // as the exit block. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 253 | Succ = createBlock(); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 254 | assert(Succ == &cfg->getExit()); |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 255 | Block = NULL; // the EXIT block is empty. Create all other blocks lazily. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 256 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 257 | // Visit the statements and create the CFG. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 258 | CFGBlock* B = addStmt(Statement); |
Mike Stump | b978a44 | 2010-01-21 02:21:40 +0000 | [diff] [blame] | 259 | |
| 260 | if (const CXXConstructorDecl *CD = dyn_cast_or_null<CXXConstructorDecl>(D)) { |
| 261 | // FIXME: Add code for base initializers and member initializers. |
| 262 | (void)CD; |
| 263 | } |
Ted Kremenek | 0ba497b | 2009-10-20 23:46:25 +0000 | [diff] [blame] | 264 | if (!B) |
| 265 | B = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 266 | |
Daniel Dunbar | c3daac5 | 2010-02-22 05:58:59 +0000 | [diff] [blame] | 267 | if (B) { |
| 268 | // Finalize the last constructed block. This usually involves reversing the |
| 269 | // order of the statements in the block. |
| 270 | if (Block) FinishBlock(B); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 271 | |
Daniel Dunbar | c3daac5 | 2010-02-22 05:58:59 +0000 | [diff] [blame] | 272 | // Backpatch the gotos whose label -> block mappings we didn't know when we |
| 273 | // encountered them. |
| 274 | for (BackpatchBlocksTy::iterator I = BackpatchBlocks.begin(), |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 275 | E = BackpatchBlocks.end(); I != E; ++I ) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 276 | |
Daniel Dunbar | c3daac5 | 2010-02-22 05:58:59 +0000 | [diff] [blame] | 277 | CFGBlock* B = *I; |
| 278 | GotoStmt* G = cast<GotoStmt>(B->getTerminator()); |
| 279 | LabelMapTy::iterator LI = LabelMap.find(G->getLabel()); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 280 | |
Daniel Dunbar | c3daac5 | 2010-02-22 05:58:59 +0000 | [diff] [blame] | 281 | // If there is no target for the goto, then we are looking at an |
| 282 | // incomplete AST. Handle this by not registering a successor. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 283 | if (LI == LabelMap.end()) continue; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 284 | |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 285 | AddSuccessor(B, LI->second); |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 286 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 287 | |
Daniel Dunbar | c3daac5 | 2010-02-22 05:58:59 +0000 | [diff] [blame] | 288 | // Add successors to the Indirect Goto Dispatch block (if we have one). |
| 289 | if (CFGBlock* B = cfg->getIndirectGotoBlock()) |
| 290 | for (LabelSetTy::iterator I = AddressTakenLabels.begin(), |
| 291 | E = AddressTakenLabels.end(); I != E; ++I ) { |
| 292 | |
| 293 | // Lookup the target block. |
| 294 | LabelMapTy::iterator LI = LabelMap.find(*I); |
| 295 | |
| 296 | // If there is no target block that contains label, then we are looking |
| 297 | // at an incomplete AST. Handle this by not registering a successor. |
| 298 | if (LI == LabelMap.end()) continue; |
| 299 | |
| 300 | AddSuccessor(B, LI->second); |
| 301 | } |
| 302 | |
| 303 | Succ = B; |
| 304 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 305 | |
| 306 | // Create an empty entry block that has no predecessors. |
Ted Kremenek | 322f58d | 2007-09-26 21:23:31 +0000 | [diff] [blame] | 307 | cfg->setEntry(createBlock()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 308 | |
Ted Kremenek | da9b30e | 2009-10-20 23:59:28 +0000 | [diff] [blame] | 309 | return badCFG ? NULL : cfg.take(); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 310 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 311 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 312 | /// createBlock - Used to lazily create blocks that are connected |
| 313 | /// to the current (global) succcessor. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 314 | CFGBlock* CFGBuilder::createBlock(bool add_successor) { |
Ted Kremenek | 9438252 | 2007-09-05 20:02:05 +0000 | [diff] [blame] | 315 | CFGBlock* B = cfg->createBlock(); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 316 | if (add_successor && Succ) |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 317 | AddSuccessor(B, Succ); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 318 | return B; |
| 319 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 320 | |
Ted Kremenek | 6c24972 | 2009-09-24 18:45:41 +0000 | [diff] [blame] | 321 | /// FinishBlock - "Finalize" the block by checking if we have a bad CFG. |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 322 | bool CFGBuilder::FinishBlock(CFGBlock* B) { |
| 323 | if (badCFG) |
| 324 | return false; |
| 325 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 326 | assert(B); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 327 | return true; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 328 | } |
| 329 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 330 | /// Visit - Walk the subtree of a statement and add extra |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 331 | /// blocks for ternary operators, &&, and ||. We also process "," and |
| 332 | /// DeclStmts (which may contain nested control-flow). |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 333 | CFGBlock* CFGBuilder::Visit(Stmt * S, AddStmtChoice asc) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 334 | tryAgain: |
| 335 | switch (S->getStmtClass()) { |
| 336 | default: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 337 | return VisitStmt(S, asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 338 | |
| 339 | case Stmt::AddrLabelExprClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 340 | return VisitAddrLabelExpr(cast<AddrLabelExpr>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 341 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 342 | case Stmt::BinaryOperatorClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 343 | return VisitBinaryOperator(cast<BinaryOperator>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 344 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 345 | case Stmt::BlockExprClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 346 | return VisitBlockExpr(cast<BlockExpr>(S), asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 347 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 348 | case Stmt::BreakStmtClass: |
| 349 | return VisitBreakStmt(cast<BreakStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 350 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 351 | case Stmt::CallExprClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 352 | return VisitCallExpr(cast<CallExpr>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 353 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 354 | case Stmt::CaseStmtClass: |
| 355 | return VisitCaseStmt(cast<CaseStmt>(S)); |
| 356 | |
| 357 | case Stmt::ChooseExprClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 358 | return VisitChooseExpr(cast<ChooseExpr>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 359 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 360 | case Stmt::CompoundStmtClass: |
| 361 | return VisitCompoundStmt(cast<CompoundStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 362 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 363 | case Stmt::ConditionalOperatorClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 364 | return VisitConditionalOperator(cast<ConditionalOperator>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 365 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 366 | case Stmt::ContinueStmtClass: |
| 367 | return VisitContinueStmt(cast<ContinueStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 368 | |
Ted Kremenek | 021c8af | 2010-01-19 20:40:33 +0000 | [diff] [blame] | 369 | case Stmt::CXXCatchStmtClass: |
| 370 | return VisitCXXCatchStmt(cast<CXXCatchStmt>(S)); |
| 371 | |
| 372 | case Stmt::CXXThrowExprClass: |
| 373 | return VisitCXXThrowExpr(cast<CXXThrowExpr>(S)); |
| 374 | |
| 375 | case Stmt::CXXTryStmtClass: |
| 376 | return VisitCXXTryStmt(cast<CXXTryStmt>(S)); |
| 377 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 378 | case Stmt::DeclStmtClass: |
| 379 | return VisitDeclStmt(cast<DeclStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 380 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 381 | case Stmt::DefaultStmtClass: |
| 382 | return VisitDefaultStmt(cast<DefaultStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 383 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 384 | case Stmt::DoStmtClass: |
| 385 | return VisitDoStmt(cast<DoStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 386 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 387 | case Stmt::ForStmtClass: |
| 388 | return VisitForStmt(cast<ForStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 389 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 390 | case Stmt::GotoStmtClass: |
| 391 | return VisitGotoStmt(cast<GotoStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 392 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 393 | case Stmt::IfStmtClass: |
| 394 | return VisitIfStmt(cast<IfStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 395 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 396 | case Stmt::IndirectGotoStmtClass: |
| 397 | return VisitIndirectGotoStmt(cast<IndirectGotoStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 398 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 399 | case Stmt::LabelStmtClass: |
| 400 | return VisitLabelStmt(cast<LabelStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 401 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 402 | case Stmt::ObjCAtCatchStmtClass: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 403 | return VisitObjCAtCatchStmt(cast<ObjCAtCatchStmt>(S)); |
| 404 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 405 | case Stmt::ObjCAtSynchronizedStmtClass: |
| 406 | return VisitObjCAtSynchronizedStmt(cast<ObjCAtSynchronizedStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 407 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 408 | case Stmt::ObjCAtThrowStmtClass: |
| 409 | return VisitObjCAtThrowStmt(cast<ObjCAtThrowStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 410 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 411 | case Stmt::ObjCAtTryStmtClass: |
| 412 | return VisitObjCAtTryStmt(cast<ObjCAtTryStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 413 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 414 | case Stmt::ObjCForCollectionStmtClass: |
| 415 | return VisitObjCForCollectionStmt(cast<ObjCForCollectionStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 416 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 417 | case Stmt::ParenExprClass: |
| 418 | S = cast<ParenExpr>(S)->getSubExpr(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 419 | goto tryAgain; |
| 420 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 421 | case Stmt::NullStmtClass: |
| 422 | return Block; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 423 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 424 | case Stmt::ReturnStmtClass: |
| 425 | return VisitReturnStmt(cast<ReturnStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 426 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 427 | case Stmt::SizeOfAlignOfExprClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 428 | return VisitSizeOfAlignOfExpr(cast<SizeOfAlignOfExpr>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 429 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 430 | case Stmt::StmtExprClass: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 431 | return VisitStmtExpr(cast<StmtExpr>(S), asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 432 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 433 | case Stmt::SwitchStmtClass: |
| 434 | return VisitSwitchStmt(cast<SwitchStmt>(S)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 435 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 436 | case Stmt::WhileStmtClass: |
| 437 | return VisitWhileStmt(cast<WhileStmt>(S)); |
| 438 | } |
| 439 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 440 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 441 | CFGBlock *CFGBuilder::VisitStmt(Stmt *S, AddStmtChoice asc) { |
| 442 | if (asc.alwaysAdd()) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 443 | autoCreateBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 444 | AppendStmt(Block, S, asc); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 445 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 446 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 447 | return VisitChildren(S); |
Ted Kremenek | 9da2fb7 | 2007-08-27 21:27:44 +0000 | [diff] [blame] | 448 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 449 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 450 | /// VisitChildren - Visit the children of a Stmt. |
| 451 | CFGBlock *CFGBuilder::VisitChildren(Stmt* Terminator) { |
| 452 | CFGBlock *B = Block; |
Mike Stump | 54cc43f | 2009-02-26 08:00:25 +0000 | [diff] [blame] | 453 | for (Stmt::child_iterator I = Terminator->child_begin(), |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 454 | E = Terminator->child_end(); I != E; ++I) { |
| 455 | if (*I) B = Visit(*I); |
| 456 | } |
Ted Kremenek | 9da2fb7 | 2007-08-27 21:27:44 +0000 | [diff] [blame] | 457 | return B; |
| 458 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 459 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 460 | CFGBlock *CFGBuilder::VisitAddrLabelExpr(AddrLabelExpr *A, |
| 461 | AddStmtChoice asc) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 462 | AddressTakenLabels.insert(A->getLabel()); |
Ted Kremenek | 9da2fb7 | 2007-08-27 21:27:44 +0000 | [diff] [blame] | 463 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 464 | if (asc.alwaysAdd()) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 465 | autoCreateBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 466 | AppendStmt(Block, A, asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 467 | } |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 468 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 469 | return Block; |
| 470 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 471 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 472 | CFGBlock *CFGBuilder::VisitBinaryOperator(BinaryOperator *B, |
| 473 | AddStmtChoice asc) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 474 | if (B->isLogicalOp()) { // && or || |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 475 | CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 476 | AppendStmt(ConfluenceBlock, B, asc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 477 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 478 | if (!FinishBlock(ConfluenceBlock)) |
| 479 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 480 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 481 | // create the block evaluating the LHS |
| 482 | CFGBlock* LHSBlock = createBlock(false); |
| 483 | LHSBlock->setTerminator(B); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 484 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 485 | // create the block evaluating the RHS |
| 486 | Succ = ConfluenceBlock; |
| 487 | Block = NULL; |
| 488 | CFGBlock* RHSBlock = addStmt(B->getRHS()); |
| 489 | if (!FinishBlock(RHSBlock)) |
| 490 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 491 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 492 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 493 | TryResult KnownVal = TryEvaluateBool(B->getLHS()); |
| 494 | if (KnownVal.isKnown() && (B->getOpcode() == BinaryOperator::LOr)) |
| 495 | KnownVal.negate(); |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 496 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 497 | // Now link the LHSBlock with RHSBlock. |
| 498 | if (B->getOpcode() == BinaryOperator::LOr) { |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 499 | AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); |
| 500 | AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 501 | } else { |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 502 | assert(B->getOpcode() == BinaryOperator::LAnd); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 503 | AddSuccessor(LHSBlock, KnownVal.isFalse() ? NULL : RHSBlock); |
| 504 | AddSuccessor(LHSBlock, KnownVal.isTrue() ? NULL : ConfluenceBlock); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 505 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 506 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 507 | // Generate the blocks for evaluating the LHS. |
| 508 | Block = LHSBlock; |
| 509 | return addStmt(B->getLHS()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 510 | } |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 511 | else if (B->getOpcode() == BinaryOperator::Comma) { // , |
Ted Kremenek | 6dc534e | 2009-07-17 22:57:50 +0000 | [diff] [blame] | 512 | autoCreateBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 513 | AppendStmt(Block, B, asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 514 | addStmt(B->getRHS()); |
| 515 | return addStmt(B->getLHS()); |
| 516 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 517 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 518 | return VisitStmt(B, asc); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 519 | } |
| 520 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 521 | CFGBlock *CFGBuilder::VisitBlockExpr(BlockExpr *E, AddStmtChoice asc) { |
| 522 | if (asc.alwaysAdd()) { |
Ted Kremenek | 721903e | 2009-11-25 01:34:30 +0000 | [diff] [blame] | 523 | autoCreateBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 524 | AppendStmt(Block, E, asc); |
Ted Kremenek | 721903e | 2009-11-25 01:34:30 +0000 | [diff] [blame] | 525 | } |
| 526 | return Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 527 | } |
| 528 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 529 | CFGBlock *CFGBuilder::VisitBreakStmt(BreakStmt *B) { |
| 530 | // "break" is a control-flow statement. Thus we stop processing the current |
| 531 | // block. |
| 532 | if (Block && !FinishBlock(Block)) |
| 533 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 534 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 535 | // Now create a new block that ends with the break statement. |
| 536 | Block = createBlock(false); |
| 537 | Block->setTerminator(B); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 538 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 539 | // If there is no target for the break, then we are looking at an incomplete |
| 540 | // AST. This means that the CFG cannot be constructed. |
| 541 | if (BreakTargetBlock) |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 542 | AddSuccessor(Block, BreakTargetBlock); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 543 | else |
| 544 | badCFG = true; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 545 | |
| 546 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 547 | return Block; |
| 548 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 549 | |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 550 | static bool CanThrow(Expr *E) { |
| 551 | QualType Ty = E->getType(); |
| 552 | if (Ty->isFunctionPointerType()) |
| 553 | Ty = Ty->getAs<PointerType>()->getPointeeType(); |
| 554 | else if (Ty->isBlockPointerType()) |
| 555 | Ty = Ty->getAs<BlockPointerType>()->getPointeeType(); |
| 556 | |
| 557 | const FunctionType *FT = Ty->getAs<FunctionType>(); |
| 558 | if (FT) { |
| 559 | if (const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(FT)) |
| 560 | if (Proto->hasEmptyExceptionSpec()) |
| 561 | return false; |
| 562 | } |
| 563 | return true; |
| 564 | } |
| 565 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 566 | CFGBlock *CFGBuilder::VisitCallExpr(CallExpr *C, AddStmtChoice asc) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 567 | // If this is a call to a no-return function, this stops the block here. |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 568 | bool NoReturn = false; |
| 569 | if (C->getCallee()->getType().getNoReturnAttr()) { |
| 570 | NoReturn = true; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 571 | } |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 572 | |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 573 | bool AddEHEdge = false; |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 574 | |
| 575 | // Languages without exceptions are assumed to not throw. |
| 576 | if (Context->getLangOptions().Exceptions) { |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 577 | if (AddEHEdges) |
| 578 | AddEHEdge = true; |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | if (FunctionDecl *FD = C->getDirectCallee()) { |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 582 | if (FD->hasAttr<NoReturnAttr>()) |
| 583 | NoReturn = true; |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 584 | if (FD->hasAttr<NoThrowAttr>()) |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 585 | AddEHEdge = false; |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 586 | } |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 587 | |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 588 | if (!CanThrow(C->getCallee())) |
| 589 | AddEHEdge = false; |
| 590 | |
| 591 | if (!NoReturn && !AddEHEdge) |
Zhongxing Xu | 9107166 | 2010-02-24 02:19:28 +0000 | [diff] [blame^] | 592 | return VisitStmt(C, AddStmtChoice::AlwaysAdd); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 593 | |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 594 | if (Block) { |
| 595 | Succ = Block; |
| 596 | if (!FinishBlock(Block)) |
| 597 | return 0; |
| 598 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 599 | |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 600 | Block = createBlock(!NoReturn); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 601 | AppendStmt(Block, C, asc); |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 602 | |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 603 | if (NoReturn) { |
| 604 | // Wire this to the exit block directly. |
| 605 | AddSuccessor(Block, &cfg->getExit()); |
| 606 | } |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 607 | if (AddEHEdge) { |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 608 | // Add exceptional edges. |
| 609 | if (TryTerminatedBlock) |
| 610 | AddSuccessor(Block, TryTerminatedBlock); |
| 611 | else |
| 612 | AddSuccessor(Block, &cfg->getExit()); |
| 613 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 614 | |
Mike Stump | 2455636 | 2009-07-25 21:26:53 +0000 | [diff] [blame] | 615 | return VisitChildren(C); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 616 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 617 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 618 | CFGBlock *CFGBuilder::VisitChooseExpr(ChooseExpr *C, |
| 619 | AddStmtChoice asc) { |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 620 | CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 621 | AppendStmt(ConfluenceBlock, C, asc); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 622 | if (!FinishBlock(ConfluenceBlock)) |
| 623 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 624 | |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 625 | Succ = ConfluenceBlock; |
| 626 | Block = NULL; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 627 | CFGBlock* LHSBlock = addStmt(C->getLHS()); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 628 | if (!FinishBlock(LHSBlock)) |
| 629 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 630 | |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 631 | Succ = ConfluenceBlock; |
| 632 | Block = NULL; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 633 | CFGBlock* RHSBlock = addStmt(C->getRHS()); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 634 | if (!FinishBlock(RHSBlock)) |
| 635 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 636 | |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 637 | Block = createBlock(false); |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 638 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 639 | const TryResult& KnownVal = TryEvaluateBool(C->getCond()); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 640 | AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); |
| 641 | AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 642 | Block->setTerminator(C); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 643 | return addStmt(C->getCond()); |
Ted Kremenek | 3fc8ef5 | 2009-07-17 18:20:32 +0000 | [diff] [blame] | 644 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 645 | |
| 646 | |
| 647 | CFGBlock* CFGBuilder::VisitCompoundStmt(CompoundStmt* C) { |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 648 | EndScope(C); |
| 649 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 650 | CFGBlock* LastBlock = Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 651 | |
| 652 | for (CompoundStmt::reverse_body_iterator I=C->body_rbegin(), E=C->body_rend(); |
| 653 | I != E; ++I ) { |
| 654 | LastBlock = addStmt(*I); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 655 | |
Ted Kremenek | e8d6d2b | 2009-08-27 23:16:26 +0000 | [diff] [blame] | 656 | if (badCFG) |
| 657 | return NULL; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 658 | } |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 659 | |
| 660 | LastBlock = StartScope(C, LastBlock); |
| 661 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 662 | return LastBlock; |
| 663 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 664 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 665 | CFGBlock *CFGBuilder::VisitConditionalOperator(ConditionalOperator *C, |
| 666 | AddStmtChoice asc) { |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 667 | // Create the confluence block that will "merge" the results of the ternary |
| 668 | // expression. |
| 669 | CFGBlock* ConfluenceBlock = Block ? Block : createBlock(); |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 670 | AppendStmt(ConfluenceBlock, C, asc); |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 671 | if (!FinishBlock(ConfluenceBlock)) |
| 672 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 673 | |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 674 | // Create a block for the LHS expression if there is an LHS expression. A |
| 675 | // GCC extension allows LHS to be NULL, causing the condition to be the |
| 676 | // value that is returned instead. |
| 677 | // e.g: x ?: y is shorthand for: x ? x : y; |
| 678 | Succ = ConfluenceBlock; |
| 679 | Block = NULL; |
| 680 | CFGBlock* LHSBlock = NULL; |
| 681 | if (C->getLHS()) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 682 | LHSBlock = addStmt(C->getLHS()); |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 683 | if (!FinishBlock(LHSBlock)) |
| 684 | return 0; |
| 685 | Block = NULL; |
| 686 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 687 | |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 688 | // Create the block for the RHS expression. |
| 689 | Succ = ConfluenceBlock; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 690 | CFGBlock* RHSBlock = addStmt(C->getRHS()); |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 691 | if (!FinishBlock(RHSBlock)) |
| 692 | return 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 693 | |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 694 | // Create the block that will contain the condition. |
| 695 | Block = createBlock(false); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 696 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 697 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 698 | const TryResult& KnownVal = TryEvaluateBool(C->getCond()); |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 699 | if (LHSBlock) { |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 700 | AddSuccessor(Block, KnownVal.isFalse() ? NULL : LHSBlock); |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 701 | } else { |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 702 | if (KnownVal.isFalse()) { |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 703 | // If we know the condition is false, add NULL as the successor for |
| 704 | // the block containing the condition. In this case, the confluence |
| 705 | // block will have just one predecessor. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 706 | AddSuccessor(Block, 0); |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 707 | assert(ConfluenceBlock->pred_size() == 1); |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 708 | } else { |
| 709 | // If we have no LHS expression, add the ConfluenceBlock as a direct |
| 710 | // successor for the block containing the condition. Moreover, we need to |
| 711 | // reverse the order of the predecessors in the ConfluenceBlock because |
| 712 | // the RHSBlock will have been added to the succcessors already, and we |
| 713 | // want the first predecessor to the the block containing the expression |
| 714 | // for the case when the ternary expression evaluates to true. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 715 | AddSuccessor(Block, ConfluenceBlock); |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 716 | assert(ConfluenceBlock->pred_size() == 2); |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 717 | std::reverse(ConfluenceBlock->pred_begin(), |
| 718 | ConfluenceBlock->pred_end()); |
| 719 | } |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 720 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 721 | |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 722 | AddSuccessor(Block, KnownVal.isTrue() ? NULL : RHSBlock); |
Ted Kremenek | f34bb2e | 2009-07-17 18:15:54 +0000 | [diff] [blame] | 723 | Block->setTerminator(C); |
| 724 | return addStmt(C->getCond()); |
| 725 | } |
| 726 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 727 | CFGBlock *CFGBuilder::VisitDeclStmt(DeclStmt *DS) { |
| 728 | autoCreateBlock(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 729 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 730 | if (DS->isSingleDecl()) { |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 731 | AppendStmt(Block, DS); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 732 | return VisitDeclSubExpr(DS->getSingleDecl()); |
Ted Kremenek | d34066c | 2008-02-26 00:22:58 +0000 | [diff] [blame] | 733 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 734 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 735 | CFGBlock *B = 0; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 736 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 737 | // FIXME: Add a reverse iterator for DeclStmt to avoid this extra copy. |
| 738 | typedef llvm::SmallVector<Decl*,10> BufTy; |
| 739 | BufTy Buf(DS->decl_begin(), DS->decl_end()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 740 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 741 | for (BufTy::reverse_iterator I = Buf.rbegin(), E = Buf.rend(); I != E; ++I) { |
| 742 | // Get the alignment of the new DeclStmt, padding out to >=8 bytes. |
| 743 | unsigned A = llvm::AlignOf<DeclStmt>::Alignment < 8 |
| 744 | ? 8 : llvm::AlignOf<DeclStmt>::Alignment; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 745 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 746 | // Allocate the DeclStmt using the BumpPtrAllocator. It will get |
| 747 | // automatically freed with the CFG. |
| 748 | DeclGroupRef DG(*I); |
| 749 | Decl *D = *I; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 750 | void *Mem = cfg->getAllocator().Allocate(sizeof(DeclStmt), A); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 751 | DeclStmt *DSNew = new (Mem) DeclStmt(DG, D->getLocation(), GetEndLoc(D)); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 752 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 753 | // Append the fake DeclStmt to block. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 754 | AppendStmt(Block, DSNew); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 755 | B = VisitDeclSubExpr(D); |
| 756 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 757 | |
| 758 | return B; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 759 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 760 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 761 | /// VisitDeclSubExpr - Utility method to add block-level expressions for |
| 762 | /// initializers in Decls. |
| 763 | CFGBlock *CFGBuilder::VisitDeclSubExpr(Decl* D) { |
| 764 | assert(Block); |
Ted Kremenek | d34066c | 2008-02-26 00:22:58 +0000 | [diff] [blame] | 765 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 766 | VarDecl *VD = dyn_cast<VarDecl>(D); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 767 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 768 | if (!VD) |
| 769 | return Block; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 770 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 771 | Expr *Init = VD->getInit(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 772 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 773 | if (Init) { |
| 774 | // Optimization: Don't create separate block-level statements for literals. |
| 775 | switch (Init->getStmtClass()) { |
| 776 | case Stmt::IntegerLiteralClass: |
| 777 | case Stmt::CharacterLiteralClass: |
| 778 | case Stmt::StringLiteralClass: |
| 779 | break; |
| 780 | default: |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 781 | Block = addStmt(Init, |
| 782 | VD->getType()->isReferenceType() |
| 783 | ? AddStmtChoice::AlwaysAddAsLValue |
| 784 | : AddStmtChoice::AlwaysAdd); |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 785 | } |
| 786 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 787 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 788 | // If the type of VD is a VLA, then we must process its size expressions. |
| 789 | for (VariableArrayType* VA = FindVA(VD->getType().getTypePtr()); VA != 0; |
| 790 | VA = FindVA(VA->getElementType().getTypePtr())) |
| 791 | Block = addStmt(VA->getSizeExpr()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 792 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 793 | return Block; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | CFGBlock* CFGBuilder::VisitIfStmt(IfStmt* I) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 797 | // We may see an if statement in the middle of a basic block, or it may be the |
| 798 | // first statement we are processing. In either case, we create a new basic |
| 799 | // block. First, we create the blocks for the then...else statements, and |
| 800 | // then we create the block containing the if statement. If we were in the |
Ted Kremenek | 6c24972 | 2009-09-24 18:45:41 +0000 | [diff] [blame] | 801 | // middle of a block, we stop processing that block. That block is then the |
| 802 | // implicit successor for the "then" and "else" clauses. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 803 | |
| 804 | // The block we were proccessing is now finished. Make it the successor |
| 805 | // block. |
| 806 | if (Block) { |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 807 | Succ = Block; |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 808 | if (!FinishBlock(Block)) |
| 809 | return 0; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 810 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 811 | |
Ted Kremenek | b6f1d78 | 2009-07-17 18:04:55 +0000 | [diff] [blame] | 812 | // Process the false branch. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 813 | CFGBlock* ElseBlock = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 814 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 815 | if (Stmt* Else = I->getElse()) { |
| 816 | SaveAndRestore<CFGBlock*> sv(Succ); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 817 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 818 | // NULL out Block so that the recursive call to Visit will |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 819 | // create a new basic block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 820 | Block = NULL; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 821 | ElseBlock = addStmt(Else); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 822 | |
Ted Kremenek | b6f7b72 | 2007-08-30 18:13:31 +0000 | [diff] [blame] | 823 | if (!ElseBlock) // Can occur when the Else body has all NullStmts. |
| 824 | ElseBlock = sv.get(); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 825 | else if (Block) { |
| 826 | if (!FinishBlock(ElseBlock)) |
| 827 | return 0; |
| 828 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 829 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 830 | |
Ted Kremenek | b6f1d78 | 2009-07-17 18:04:55 +0000 | [diff] [blame] | 831 | // Process the true branch. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 832 | CFGBlock* ThenBlock; |
| 833 | { |
| 834 | Stmt* Then = I->getThen(); |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 835 | assert(Then); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 836 | SaveAndRestore<CFGBlock*> sv(Succ); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 837 | Block = NULL; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 838 | ThenBlock = addStmt(Then); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 839 | |
Ted Kremenek | dbdf794 | 2009-04-01 03:52:47 +0000 | [diff] [blame] | 840 | if (!ThenBlock) { |
| 841 | // We can reach here if the "then" body has all NullStmts. |
| 842 | // Create an empty block so we can distinguish between true and false |
| 843 | // branches in path-sensitive analyses. |
| 844 | ThenBlock = createBlock(false); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 845 | AddSuccessor(ThenBlock, sv.get()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 846 | } else if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 847 | if (!FinishBlock(ThenBlock)) |
| 848 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 849 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 850 | } |
| 851 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 852 | // Now create a new block containing the if statement. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 853 | Block = createBlock(false); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 854 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 855 | // Set the terminator of the new block to the If statement. |
| 856 | Block->setTerminator(I); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 857 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 858 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 859 | const TryResult &KnownVal = TryEvaluateBool(I->getCond()); |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 860 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 861 | // Now add the successors. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 862 | AddSuccessor(Block, KnownVal.isFalse() ? NULL : ThenBlock); |
| 863 | AddSuccessor(Block, KnownVal.isTrue()? NULL : ElseBlock); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 864 | |
| 865 | // Add the condition as the last statement in the new block. This may create |
| 866 | // new blocks as the condition may contain control-flow. Any newly created |
| 867 | // blocks will be pointed to be "Block". |
Ted Kremenek | 61dfbec | 2009-12-23 04:49:01 +0000 | [diff] [blame] | 868 | Block = addStmt(I->getCond()); |
| 869 | |
| 870 | // Finally, if the IfStmt contains a condition variable, add both the IfStmt |
| 871 | // and the condition variable initialization to the CFG. |
| 872 | if (VarDecl *VD = I->getConditionVariable()) { |
| 873 | if (Expr *Init = VD->getInit()) { |
| 874 | autoCreateBlock(); |
| 875 | AppendStmt(Block, I, AddStmtChoice::AlwaysAdd); |
| 876 | addStmt(Init); |
| 877 | } |
| 878 | } |
| 879 | |
| 880 | return Block; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 881 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 882 | |
| 883 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 884 | CFGBlock* CFGBuilder::VisitReturnStmt(ReturnStmt* R) { |
Ted Kremenek | 6c24972 | 2009-09-24 18:45:41 +0000 | [diff] [blame] | 885 | // If we were in the middle of a block we stop processing that block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 886 | // |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 887 | // NOTE: If a "return" appears in the middle of a block, this means that the |
| 888 | // code afterwards is DEAD (unreachable). We still keep a basic block |
| 889 | // for that code; a simple "mark-and-sweep" from the entry block will be |
| 890 | // able to report such dead blocks. |
Ted Kremenek | 6c24972 | 2009-09-24 18:45:41 +0000 | [diff] [blame] | 891 | if (Block) |
| 892 | FinishBlock(Block); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 893 | |
| 894 | // Create the new block. |
| 895 | Block = createBlock(false); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 896 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 897 | // The Exit block is the only successor. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 898 | AddSuccessor(Block, &cfg->getExit()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 899 | |
| 900 | // Add the return statement to the block. This may create new blocks if R |
| 901 | // contains control-flow (short-circuit operations). |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 902 | return VisitStmt(R, AddStmtChoice::AlwaysAdd); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 903 | } |
| 904 | |
| 905 | CFGBlock* CFGBuilder::VisitLabelStmt(LabelStmt* L) { |
| 906 | // Get the block of the labeled statement. Add it to our map. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 907 | addStmt(L->getSubStmt()); |
Ted Kremenek | 2677ea8 | 2008-03-15 07:45:02 +0000 | [diff] [blame] | 908 | CFGBlock* LabelBlock = Block; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 909 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 910 | if (!LabelBlock) // This can happen when the body is empty, i.e. |
| 911 | LabelBlock = createBlock(); // scopes that only contains NullStmts. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 912 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 913 | assert(LabelMap.find(L) == LabelMap.end() && "label already in map"); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 914 | LabelMap[ L ] = LabelBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 915 | |
| 916 | // Labels partition blocks, so this is the end of the basic block we were |
| 917 | // processing (L is the block's label). Because this is label (and we have |
| 918 | // already processed the substatement) there is no extra control-flow to worry |
| 919 | // about. |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 920 | LabelBlock->setLabel(L); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 921 | if (!FinishBlock(LabelBlock)) |
| 922 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 923 | |
| 924 | // We set Block to NULL to allow lazy creation of a new block (if necessary); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 925 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 926 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 927 | // This block is now the implicit successor of other blocks. |
| 928 | Succ = LabelBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 929 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 930 | return LabelBlock; |
| 931 | } |
| 932 | |
| 933 | CFGBlock* CFGBuilder::VisitGotoStmt(GotoStmt* G) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 934 | // Goto is a control-flow statement. Thus we stop processing the current |
| 935 | // block and create a new one. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 936 | if (Block) |
| 937 | FinishBlock(Block); |
| 938 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 939 | Block = createBlock(false); |
| 940 | Block->setTerminator(G); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 941 | |
| 942 | // If we already know the mapping to the label block add the successor now. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 943 | LabelMapTy::iterator I = LabelMap.find(G->getLabel()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 944 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 945 | if (I == LabelMap.end()) |
| 946 | // We will need to backpatch this block later. |
| 947 | BackpatchBlocks.push_back(Block); |
| 948 | else |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 949 | AddSuccessor(Block, I->second); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 950 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 951 | return Block; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 952 | } |
| 953 | |
| 954 | CFGBlock* CFGBuilder::VisitForStmt(ForStmt* F) { |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 955 | CFGBlock* LoopSuccessor = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 956 | |
Mike Stump | fefb9f7 | 2009-07-21 01:12:51 +0000 | [diff] [blame] | 957 | // "for" is a control-flow statement. Thus we stop processing the current |
| 958 | // block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 959 | if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 960 | if (!FinishBlock(Block)) |
| 961 | return 0; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 962 | LoopSuccessor = Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 963 | } else |
| 964 | LoopSuccessor = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 965 | |
| 966 | // Because of short-circuit evaluation, the condition of the loop can span |
| 967 | // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that |
| 968 | // evaluate the condition. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 969 | CFGBlock* ExitConditionBlock = createBlock(false); |
| 970 | CFGBlock* EntryConditionBlock = ExitConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 971 | |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 972 | // Set the terminator for the "exit" condition block. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 973 | ExitConditionBlock->setTerminator(F); |
| 974 | |
| 975 | // Now add the actual condition to the condition block. Because the condition |
| 976 | // itself may contain control-flow, new blocks may be created. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 977 | if (Stmt* C = F->getCond()) { |
| 978 | Block = ExitConditionBlock; |
| 979 | EntryConditionBlock = addStmt(C); |
Ted Kremenek | 58b87fe | 2009-12-24 01:49:06 +0000 | [diff] [blame] | 980 | assert(Block == EntryConditionBlock); |
| 981 | |
| 982 | // If this block contains a condition variable, add both the condition |
| 983 | // variable and initializer to the CFG. |
| 984 | if (VarDecl *VD = F->getConditionVariable()) { |
| 985 | if (Expr *Init = VD->getInit()) { |
| 986 | autoCreateBlock(); |
| 987 | AppendStmt(Block, F, AddStmtChoice::AlwaysAdd); |
| 988 | EntryConditionBlock = addStmt(Init); |
| 989 | assert(Block == EntryConditionBlock); |
| 990 | } |
| 991 | } |
| 992 | |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 993 | if (Block) { |
| 994 | if (!FinishBlock(EntryConditionBlock)) |
| 995 | return 0; |
| 996 | } |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 997 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 998 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 999 | // The condition block is the implicit successor for the loop body as well as |
| 1000 | // any code above the loop. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1001 | Succ = EntryConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1002 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 1003 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1004 | TryResult KnownVal(true); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1005 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 1006 | if (F->getCond()) |
| 1007 | KnownVal = TryEvaluateBool(F->getCond()); |
| 1008 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1009 | // Now create the loop body. |
| 1010 | { |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 1011 | assert(F->getBody()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1012 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1013 | // Save the current values for Block, Succ, and continue and break targets |
| 1014 | SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1015 | save_continue(ContinueTargetBlock), |
| 1016 | save_break(BreakTargetBlock); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1017 | |
Ted Kremenek | af603f7 | 2007-08-30 18:39:40 +0000 | [diff] [blame] | 1018 | // Create a new block to contain the (bottom) of the loop body. |
| 1019 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1020 | |
Ted Kremenek | e933450 | 2008-09-04 21:48:47 +0000 | [diff] [blame] | 1021 | if (Stmt* I = F->getInc()) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1022 | // Generate increment code in its own basic block. This is the target of |
| 1023 | // continue statements. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1024 | Succ = addStmt(I); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1025 | } else { |
| 1026 | // No increment code. Create a special, empty, block that is used as the |
| 1027 | // target block for "looping back" to the start of the loop. |
Ted Kremenek | 3575f84 | 2009-04-28 00:51:56 +0000 | [diff] [blame] | 1028 | assert(Succ == EntryConditionBlock); |
| 1029 | Succ = createBlock(); |
Ted Kremenek | e933450 | 2008-09-04 21:48:47 +0000 | [diff] [blame] | 1030 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1031 | |
Ted Kremenek | 3575f84 | 2009-04-28 00:51:56 +0000 | [diff] [blame] | 1032 | // Finish up the increment (or empty) block if it hasn't been already. |
| 1033 | if (Block) { |
| 1034 | assert(Block == Succ); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1035 | if (!FinishBlock(Block)) |
| 1036 | return 0; |
Ted Kremenek | 3575f84 | 2009-04-28 00:51:56 +0000 | [diff] [blame] | 1037 | Block = 0; |
| 1038 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1039 | |
Ted Kremenek | 3575f84 | 2009-04-28 00:51:56 +0000 | [diff] [blame] | 1040 | ContinueTargetBlock = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1041 | |
Ted Kremenek | 3575f84 | 2009-04-28 00:51:56 +0000 | [diff] [blame] | 1042 | // The starting block for the loop increment is the block that should |
| 1043 | // represent the 'loop target' for looping back to the start of the loop. |
| 1044 | ContinueTargetBlock->setLoopTarget(F); |
| 1045 | |
Ted Kremenek | e933450 | 2008-09-04 21:48:47 +0000 | [diff] [blame] | 1046 | // All breaks should go to the code following the loop. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1047 | BreakTargetBlock = LoopSuccessor; |
| 1048 | |
| 1049 | // Now populate the body block, and in the process create new blocks as we |
| 1050 | // walk the body of the loop. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1051 | CFGBlock* BodyBlock = addStmt(F->getBody()); |
Ted Kremenek | af603f7 | 2007-08-30 18:39:40 +0000 | [diff] [blame] | 1052 | |
| 1053 | if (!BodyBlock) |
Zhongxing Xu | 1d4b218 | 2009-08-20 02:56:48 +0000 | [diff] [blame] | 1054 | BodyBlock = ContinueTargetBlock; // can happen for "for (...;...;...) ;" |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1055 | else if (Block && !FinishBlock(BodyBlock)) |
| 1056 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1057 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1058 | // This new body block is a successor to our "exit" condition block. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1059 | AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1060 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1061 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1062 | // Link up the condition block with the code that follows the loop. (the |
| 1063 | // false branch). |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1064 | AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1065 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1066 | // If the loop contains initialization, create a new block for those |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1067 | // statements. This block can also contain statements that precede the loop. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1068 | if (Stmt* I = F->getInit()) { |
| 1069 | Block = createBlock(); |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1070 | return addStmt(I); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1071 | } else { |
| 1072 | // There is no loop initialization. We are thus basically a while loop. |
| 1073 | // NULL out Block to force lazy block construction. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1074 | Block = NULL; |
Ted Kremenek | 5482713 | 2008-02-27 07:20:00 +0000 | [diff] [blame] | 1075 | Succ = EntryConditionBlock; |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1076 | return EntryConditionBlock; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1077 | } |
| 1078 | } |
| 1079 | |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1080 | CFGBlock* CFGBuilder::VisitObjCForCollectionStmt(ObjCForCollectionStmt* S) { |
| 1081 | // Objective-C fast enumeration 'for' statements: |
| 1082 | // http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC |
| 1083 | // |
| 1084 | // for ( Type newVariable in collection_expression ) { statements } |
| 1085 | // |
| 1086 | // becomes: |
| 1087 | // |
| 1088 | // prologue: |
| 1089 | // 1. collection_expression |
| 1090 | // T. jump to loop_entry |
| 1091 | // loop_entry: |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1092 | // 1. side-effects of element expression |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1093 | // 1. ObjCForCollectionStmt [performs binding to newVariable] |
| 1094 | // T. ObjCForCollectionStmt TB, FB [jumps to TB if newVariable != nil] |
| 1095 | // TB: |
| 1096 | // statements |
| 1097 | // T. jump to loop_entry |
| 1098 | // FB: |
| 1099 | // what comes after |
| 1100 | // |
| 1101 | // and |
| 1102 | // |
| 1103 | // Type existingItem; |
| 1104 | // for ( existingItem in expression ) { statements } |
| 1105 | // |
| 1106 | // becomes: |
| 1107 | // |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1108 | // the same with newVariable replaced with existingItem; the binding works |
| 1109 | // the same except that for one ObjCForCollectionStmt::getElement() returns |
| 1110 | // a DeclStmt and the other returns a DeclRefExpr. |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1111 | // |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1112 | |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1113 | CFGBlock* LoopSuccessor = 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1114 | |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1115 | if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1116 | if (!FinishBlock(Block)) |
| 1117 | return 0; |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1118 | LoopSuccessor = Block; |
| 1119 | Block = 0; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1120 | } else |
| 1121 | LoopSuccessor = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1122 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1123 | // Build the condition blocks. |
| 1124 | CFGBlock* ExitConditionBlock = createBlock(false); |
| 1125 | CFGBlock* EntryConditionBlock = ExitConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1126 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1127 | // Set the terminator for the "exit" condition block. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1128 | ExitConditionBlock->setTerminator(S); |
| 1129 | |
| 1130 | // The last statement in the block should be the ObjCForCollectionStmt, which |
| 1131 | // performs the actual binding to 'element' and determines if there are any |
| 1132 | // more items in the collection. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1133 | AppendStmt(ExitConditionBlock, S); |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1134 | Block = ExitConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1135 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1136 | // Walk the 'element' expression to see if there are any side-effects. We |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1137 | // generate new blocks as necesary. We DON'T add the statement by default to |
| 1138 | // the CFG unless it contains control-flow. |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 1139 | EntryConditionBlock = Visit(S->getElement(), AddStmtChoice::NotAlwaysAdd); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1140 | if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1141 | if (!FinishBlock(EntryConditionBlock)) |
| 1142 | return 0; |
| 1143 | Block = 0; |
| 1144 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1145 | |
| 1146 | // The condition block is the implicit successor for the loop body as well as |
| 1147 | // any code above the loop. |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1148 | Succ = EntryConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1149 | |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1150 | // Now create the true branch. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1151 | { |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1152 | // Save the current values for Succ, continue and break targets. |
| 1153 | SaveAndRestore<CFGBlock*> save_Succ(Succ), |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1154 | save_continue(ContinueTargetBlock), save_break(BreakTargetBlock); |
| 1155 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1156 | BreakTargetBlock = LoopSuccessor; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1157 | ContinueTargetBlock = EntryConditionBlock; |
| 1158 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1159 | CFGBlock* BodyBlock = addStmt(S->getBody()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1160 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1161 | if (!BodyBlock) |
| 1162 | BodyBlock = EntryConditionBlock; // can happen for "for (X in Y) ;" |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1163 | else if (Block) { |
| 1164 | if (!FinishBlock(BodyBlock)) |
| 1165 | return 0; |
| 1166 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1167 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1168 | // This new body block is a successor to our "exit" condition block. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1169 | AddSuccessor(ExitConditionBlock, BodyBlock); |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1170 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1171 | |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1172 | // Link up the condition block with the code that follows the loop. |
| 1173 | // (the false branch). |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1174 | AddSuccessor(ExitConditionBlock, LoopSuccessor); |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1175 | |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1176 | // Now create a prologue block to contain the collection expression. |
Ted Kremenek | 4cb3a85 | 2008-11-14 01:57:41 +0000 | [diff] [blame] | 1177 | Block = createBlock(); |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1178 | return addStmt(S->getCollection()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1179 | } |
| 1180 | |
Ted Kremenek | b3b0b36 | 2009-05-02 01:49:13 +0000 | [diff] [blame] | 1181 | CFGBlock* CFGBuilder::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt* S) { |
| 1182 | // FIXME: Add locking 'primitives' to CFG for @synchronized. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1183 | |
Ted Kremenek | b3b0b36 | 2009-05-02 01:49:13 +0000 | [diff] [blame] | 1184 | // Inline the body. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1185 | CFGBlock *SyncBlock = addStmt(S->getSynchBody()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1186 | |
Ted Kremenek | da5348e | 2009-05-05 23:11:51 +0000 | [diff] [blame] | 1187 | // The sync body starts its own basic block. This makes it a little easier |
| 1188 | // for diagnostic clients. |
| 1189 | if (SyncBlock) { |
| 1190 | if (!FinishBlock(SyncBlock)) |
| 1191 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1192 | |
Ted Kremenek | da5348e | 2009-05-05 23:11:51 +0000 | [diff] [blame] | 1193 | Block = 0; |
| 1194 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1195 | |
Ted Kremenek | da5348e | 2009-05-05 23:11:51 +0000 | [diff] [blame] | 1196 | Succ = SyncBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1197 | |
Ted Kremenek | b3b0b36 | 2009-05-02 01:49:13 +0000 | [diff] [blame] | 1198 | // Inline the sync expression. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1199 | return addStmt(S->getSynchExpr()); |
Ted Kremenek | b3b0b36 | 2009-05-02 01:49:13 +0000 | [diff] [blame] | 1200 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1201 | |
Ted Kremenek | e31c0d2 | 2009-03-30 22:29:21 +0000 | [diff] [blame] | 1202 | CFGBlock* CFGBuilder::VisitObjCAtTryStmt(ObjCAtTryStmt* S) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1203 | // FIXME |
Ted Kremenek | 90658ec | 2009-04-07 04:26:02 +0000 | [diff] [blame] | 1204 | return NYS(); |
Ted Kremenek | e31c0d2 | 2009-03-30 22:29:21 +0000 | [diff] [blame] | 1205 | } |
Ted Kremenek | 514de5a | 2008-11-11 17:10:00 +0000 | [diff] [blame] | 1206 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1207 | CFGBlock* CFGBuilder::VisitWhileStmt(WhileStmt* W) { |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1208 | CFGBlock* LoopSuccessor = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1209 | |
Mike Stump | fefb9f7 | 2009-07-21 01:12:51 +0000 | [diff] [blame] | 1210 | // "while" is a control-flow statement. Thus we stop processing the current |
| 1211 | // block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1212 | if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1213 | if (!FinishBlock(Block)) |
| 1214 | return 0; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1215 | LoopSuccessor = Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1216 | } else |
| 1217 | LoopSuccessor = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1218 | |
| 1219 | // Because of short-circuit evaluation, the condition of the loop can span |
| 1220 | // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that |
| 1221 | // evaluate the condition. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1222 | CFGBlock* ExitConditionBlock = createBlock(false); |
| 1223 | CFGBlock* EntryConditionBlock = ExitConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1224 | |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1225 | // Set the terminator for the "exit" condition block. |
| 1226 | ExitConditionBlock->setTerminator(W); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1227 | |
| 1228 | // Now add the actual condition to the condition block. Because the condition |
| 1229 | // itself may contain control-flow, new blocks may be created. Thus we update |
| 1230 | // "Succ" after adding the condition. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1231 | if (Stmt* C = W->getCond()) { |
| 1232 | Block = ExitConditionBlock; |
| 1233 | EntryConditionBlock = addStmt(C); |
Ted Kremenek | f6e8541 | 2009-04-28 03:09:44 +0000 | [diff] [blame] | 1234 | assert(Block == EntryConditionBlock); |
Ted Kremenek | 4ec010a | 2009-12-24 01:34:10 +0000 | [diff] [blame] | 1235 | |
| 1236 | // If this block contains a condition variable, add both the condition |
| 1237 | // variable and initializer to the CFG. |
| 1238 | if (VarDecl *VD = W->getConditionVariable()) { |
| 1239 | if (Expr *Init = VD->getInit()) { |
| 1240 | autoCreateBlock(); |
| 1241 | AppendStmt(Block, W, AddStmtChoice::AlwaysAdd); |
| 1242 | EntryConditionBlock = addStmt(Init); |
| 1243 | assert(Block == EntryConditionBlock); |
| 1244 | } |
| 1245 | } |
| 1246 | |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1247 | if (Block) { |
| 1248 | if (!FinishBlock(EntryConditionBlock)) |
| 1249 | return 0; |
| 1250 | } |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1251 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1252 | |
| 1253 | // The condition block is the implicit successor for the loop body as well as |
| 1254 | // any code above the loop. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1255 | Succ = EntryConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1256 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 1257 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1258 | const TryResult& KnownVal = TryEvaluateBool(W->getCond()); |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 1259 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1260 | // Process the loop body. |
| 1261 | { |
Ted Kremenek | f6e8541 | 2009-04-28 03:09:44 +0000 | [diff] [blame] | 1262 | assert(W->getBody()); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1263 | |
| 1264 | // Save the current values for Block, Succ, and continue and break targets |
| 1265 | SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), |
| 1266 | save_continue(ContinueTargetBlock), |
| 1267 | save_break(BreakTargetBlock); |
Ted Kremenek | f6e8541 | 2009-04-28 03:09:44 +0000 | [diff] [blame] | 1268 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1269 | // Create an empty block to represent the transition block for looping back |
| 1270 | // to the head of the loop. |
Ted Kremenek | f6e8541 | 2009-04-28 03:09:44 +0000 | [diff] [blame] | 1271 | Block = 0; |
| 1272 | assert(Succ == EntryConditionBlock); |
| 1273 | Succ = createBlock(); |
| 1274 | Succ->setLoopTarget(W); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1275 | ContinueTargetBlock = Succ; |
| 1276 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1277 | // All breaks should go to the code following the loop. |
| 1278 | BreakTargetBlock = LoopSuccessor; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1279 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1280 | // NULL out Block to force lazy instantiation of blocks for the body. |
| 1281 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1282 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1283 | // Create the body. The returned block is the entry to the loop body. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1284 | CFGBlock* BodyBlock = addStmt(W->getBody()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1285 | |
Ted Kremenek | af603f7 | 2007-08-30 18:39:40 +0000 | [diff] [blame] | 1286 | if (!BodyBlock) |
Zhongxing Xu | d5c3b13 | 2009-08-20 03:21:49 +0000 | [diff] [blame] | 1287 | BodyBlock = ContinueTargetBlock; // can happen for "while(...) ;" |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1288 | else if (Block) { |
| 1289 | if (!FinishBlock(BodyBlock)) |
| 1290 | return 0; |
| 1291 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1292 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1293 | // Add the loop body entry as a successor to the condition. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1294 | AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : BodyBlock); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1295 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1296 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1297 | // Link up the condition block with the code that follows the loop. (the |
| 1298 | // false branch). |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1299 | AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1300 | |
| 1301 | // There can be no more statements in the condition block since we loop back |
| 1302 | // to this block. NULL out Block to force lazy creation of another block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1303 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1304 | |
Ted Kremenek | 4ec010a | 2009-12-24 01:34:10 +0000 | [diff] [blame] | 1305 | // Return the condition block, which is the dominating block for the loop. |
Ted Kremenek | 5482713 | 2008-02-27 07:20:00 +0000 | [diff] [blame] | 1306 | Succ = EntryConditionBlock; |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1307 | return EntryConditionBlock; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1308 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1309 | |
| 1310 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1311 | CFGBlock *CFGBuilder::VisitObjCAtCatchStmt(ObjCAtCatchStmt* S) { |
| 1312 | // FIXME: For now we pretend that @catch and the code it contains does not |
| 1313 | // exit. |
| 1314 | return Block; |
| 1315 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1316 | |
Ted Kremenek | 2fda504 | 2008-12-09 20:20:09 +0000 | [diff] [blame] | 1317 | CFGBlock* CFGBuilder::VisitObjCAtThrowStmt(ObjCAtThrowStmt* S) { |
| 1318 | // FIXME: This isn't complete. We basically treat @throw like a return |
| 1319 | // statement. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1320 | |
Ted Kremenek | 6c24972 | 2009-09-24 18:45:41 +0000 | [diff] [blame] | 1321 | // If we were in the middle of a block we stop processing that block. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1322 | if (Block && !FinishBlock(Block)) |
| 1323 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1324 | |
Ted Kremenek | 2fda504 | 2008-12-09 20:20:09 +0000 | [diff] [blame] | 1325 | // Create the new block. |
| 1326 | Block = createBlock(false); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1327 | |
Ted Kremenek | 2fda504 | 2008-12-09 20:20:09 +0000 | [diff] [blame] | 1328 | // The Exit block is the only successor. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1329 | AddSuccessor(Block, &cfg->getExit()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1330 | |
| 1331 | // Add the statement to the block. This may create new blocks if S contains |
| 1332 | // control-flow (short-circuit operations). |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 1333 | return VisitStmt(S, AddStmtChoice::AlwaysAdd); |
Ted Kremenek | 2fda504 | 2008-12-09 20:20:09 +0000 | [diff] [blame] | 1334 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1335 | |
Mike Stump | 0979d80 | 2009-07-22 22:56:04 +0000 | [diff] [blame] | 1336 | CFGBlock* CFGBuilder::VisitCXXThrowExpr(CXXThrowExpr* T) { |
Ted Kremenek | 6c24972 | 2009-09-24 18:45:41 +0000 | [diff] [blame] | 1337 | // If we were in the middle of a block we stop processing that block. |
Mike Stump | 0979d80 | 2009-07-22 22:56:04 +0000 | [diff] [blame] | 1338 | if (Block && !FinishBlock(Block)) |
| 1339 | return 0; |
| 1340 | |
| 1341 | // Create the new block. |
| 1342 | Block = createBlock(false); |
| 1343 | |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1344 | if (TryTerminatedBlock) |
| 1345 | // The current try statement is the only successor. |
| 1346 | AddSuccessor(Block, TryTerminatedBlock); |
| 1347 | else |
| 1348 | // otherwise the Exit block is the only successor. |
| 1349 | AddSuccessor(Block, &cfg->getExit()); |
Mike Stump | 0979d80 | 2009-07-22 22:56:04 +0000 | [diff] [blame] | 1350 | |
| 1351 | // Add the statement to the block. This may create new blocks if S contains |
| 1352 | // control-flow (short-circuit operations). |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 1353 | return VisitStmt(T, AddStmtChoice::AlwaysAdd); |
Mike Stump | 0979d80 | 2009-07-22 22:56:04 +0000 | [diff] [blame] | 1354 | } |
| 1355 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1356 | CFGBlock *CFGBuilder::VisitDoStmt(DoStmt* D) { |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1357 | CFGBlock* LoopSuccessor = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1358 | |
Mike Stump | 8f9893a | 2009-07-21 01:27:50 +0000 | [diff] [blame] | 1359 | // "do...while" is a control-flow statement. Thus we stop processing the |
| 1360 | // current block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1361 | if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1362 | if (!FinishBlock(Block)) |
| 1363 | return 0; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1364 | LoopSuccessor = Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1365 | } else |
| 1366 | LoopSuccessor = Succ; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1367 | |
| 1368 | // Because of short-circuit evaluation, the condition of the loop can span |
| 1369 | // multiple basic blocks. Thus we need the "Entry" and "Exit" blocks that |
| 1370 | // evaluate the condition. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1371 | CFGBlock* ExitConditionBlock = createBlock(false); |
| 1372 | CFGBlock* EntryConditionBlock = ExitConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1373 | |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1374 | // Set the terminator for the "exit" condition block. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1375 | ExitConditionBlock->setTerminator(D); |
| 1376 | |
| 1377 | // Now add the actual condition to the condition block. Because the condition |
| 1378 | // itself may contain control-flow, new blocks may be created. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1379 | if (Stmt* C = D->getCond()) { |
| 1380 | Block = ExitConditionBlock; |
| 1381 | EntryConditionBlock = addStmt(C); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1382 | if (Block) { |
| 1383 | if (!FinishBlock(EntryConditionBlock)) |
| 1384 | return 0; |
| 1385 | } |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1386 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1387 | |
Ted Kremenek | 5482713 | 2008-02-27 07:20:00 +0000 | [diff] [blame] | 1388 | // The condition block is the implicit successor for the loop body. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1389 | Succ = EntryConditionBlock; |
| 1390 | |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 1391 | // See if this is a known constant. |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1392 | const TryResult &KnownVal = TryEvaluateBool(D->getCond()); |
Mike Stump | 00998a0 | 2009-07-23 23:25:26 +0000 | [diff] [blame] | 1393 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1394 | // Process the loop body. |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1395 | CFGBlock* BodyBlock = NULL; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1396 | { |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 1397 | assert(D->getBody()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1398 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1399 | // Save the current values for Block, Succ, and continue and break targets |
| 1400 | SaveAndRestore<CFGBlock*> save_Block(Block), save_Succ(Succ), |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1401 | save_continue(ContinueTargetBlock), |
| 1402 | save_break(BreakTargetBlock); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1403 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1404 | // All continues within this loop should go to the condition block |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1405 | ContinueTargetBlock = EntryConditionBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1406 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1407 | // All breaks should go to the code following the loop. |
| 1408 | BreakTargetBlock = LoopSuccessor; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1409 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1410 | // NULL out Block to force lazy instantiation of blocks for the body. |
| 1411 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1412 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1413 | // Create the body. The returned block is the entry to the loop body. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1414 | BodyBlock = addStmt(D->getBody()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1415 | |
Ted Kremenek | af603f7 | 2007-08-30 18:39:40 +0000 | [diff] [blame] | 1416 | if (!BodyBlock) |
Ted Kremenek | a9d996d | 2008-02-27 00:28:17 +0000 | [diff] [blame] | 1417 | BodyBlock = EntryConditionBlock; // can happen for "do ; while(...)" |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1418 | else if (Block) { |
| 1419 | if (!FinishBlock(BodyBlock)) |
| 1420 | return 0; |
| 1421 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1422 | |
Ted Kremenek | 8f08c9d | 2009-04-28 04:22:00 +0000 | [diff] [blame] | 1423 | // Add an intermediate block between the BodyBlock and the |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1424 | // ExitConditionBlock to represent the "loop back" transition. Create an |
| 1425 | // empty block to represent the transition block for looping back to the |
| 1426 | // head of the loop. |
Ted Kremenek | 8f08c9d | 2009-04-28 04:22:00 +0000 | [diff] [blame] | 1427 | // FIXME: Can we do this more efficiently without adding another block? |
| 1428 | Block = NULL; |
| 1429 | Succ = BodyBlock; |
| 1430 | CFGBlock *LoopBackBlock = createBlock(); |
| 1431 | LoopBackBlock->setLoopTarget(D); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1432 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1433 | // Add the loop body entry as a successor to the condition. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1434 | AddSuccessor(ExitConditionBlock, KnownVal.isFalse() ? NULL : LoopBackBlock); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1435 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1436 | |
Ted Kremenek | 941fde8 | 2009-07-24 04:47:11 +0000 | [diff] [blame] | 1437 | // Link up the condition block with the code that follows the loop. |
| 1438 | // (the false branch). |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1439 | AddSuccessor(ExitConditionBlock, KnownVal.isTrue() ? NULL : LoopSuccessor); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1440 | |
| 1441 | // There can be no more statements in the body block(s) since we loop back to |
| 1442 | // the body. NULL out Block to force lazy creation of another block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1443 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1444 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1445 | // Return the loop body, which is the dominating block for the loop. |
Ted Kremenek | 5482713 | 2008-02-27 07:20:00 +0000 | [diff] [blame] | 1446 | Succ = BodyBlock; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1447 | return BodyBlock; |
| 1448 | } |
| 1449 | |
| 1450 | CFGBlock* CFGBuilder::VisitContinueStmt(ContinueStmt* C) { |
| 1451 | // "continue" is a control-flow statement. Thus we stop processing the |
| 1452 | // current block. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1453 | if (Block && !FinishBlock(Block)) |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1454 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1455 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1456 | // Now create a new block that ends with the continue statement. |
| 1457 | Block = createBlock(false); |
| 1458 | Block->setTerminator(C); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1459 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1460 | // If there is no target for the continue, then we are looking at an |
Ted Kremenek | 235c5ed | 2009-04-07 18:53:24 +0000 | [diff] [blame] | 1461 | // incomplete AST. This means the CFG cannot be constructed. |
| 1462 | if (ContinueTargetBlock) |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1463 | AddSuccessor(Block, ContinueTargetBlock); |
Ted Kremenek | 235c5ed | 2009-04-07 18:53:24 +0000 | [diff] [blame] | 1464 | else |
| 1465 | badCFG = true; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1466 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1467 | return Block; |
| 1468 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1469 | |
Ted Kremenek | 13fc08a | 2009-07-18 00:47:21 +0000 | [diff] [blame] | 1470 | CFGBlock *CFGBuilder::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E, |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 1471 | AddStmtChoice asc) { |
Ted Kremenek | 13fc08a | 2009-07-18 00:47:21 +0000 | [diff] [blame] | 1472 | |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 1473 | if (asc.alwaysAdd()) { |
Ted Kremenek | 13fc08a | 2009-07-18 00:47:21 +0000 | [diff] [blame] | 1474 | autoCreateBlock(); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1475 | AppendStmt(Block, E); |
Ted Kremenek | 13fc08a | 2009-07-18 00:47:21 +0000 | [diff] [blame] | 1476 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1477 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1478 | // VLA types have expressions that must be evaluated. |
| 1479 | if (E->isArgumentType()) { |
| 1480 | for (VariableArrayType* VA = FindVA(E->getArgumentType().getTypePtr()); |
| 1481 | VA != 0; VA = FindVA(VA->getElementType().getTypePtr())) |
| 1482 | addStmt(VA->getSizeExpr()); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1483 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1484 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1485 | return Block; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1486 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1487 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1488 | /// VisitStmtExpr - Utility method to handle (nested) statement |
| 1489 | /// expressions (a GCC extension). |
Ted Kremenek | 852274d | 2009-12-16 03:18:58 +0000 | [diff] [blame] | 1490 | CFGBlock* CFGBuilder::VisitStmtExpr(StmtExpr *SE, AddStmtChoice asc) { |
| 1491 | if (asc.alwaysAdd()) { |
Ted Kremenek | 13fc08a | 2009-07-18 00:47:21 +0000 | [diff] [blame] | 1492 | autoCreateBlock(); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1493 | AppendStmt(Block, SE); |
Ted Kremenek | 13fc08a | 2009-07-18 00:47:21 +0000 | [diff] [blame] | 1494 | } |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1495 | return VisitCompoundStmt(SE->getSubStmt()); |
| 1496 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1497 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1498 | CFGBlock* CFGBuilder::VisitSwitchStmt(SwitchStmt* Terminator) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1499 | // "switch" is a control-flow statement. Thus we stop processing the current |
| 1500 | // block. |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1501 | CFGBlock* SwitchSuccessor = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1502 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1503 | if (Block) { |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1504 | if (!FinishBlock(Block)) |
| 1505 | return 0; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1506 | SwitchSuccessor = Block; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1507 | } else SwitchSuccessor = Succ; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1508 | |
| 1509 | // Save the current "switch" context. |
| 1510 | SaveAndRestore<CFGBlock*> save_switch(SwitchTerminatedBlock), |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 1511 | save_break(BreakTargetBlock), |
| 1512 | save_default(DefaultCaseBlock); |
| 1513 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1514 | // Set the "default" case to be the block after the switch statement. If the |
| 1515 | // switch statement contains a "default:", this value will be overwritten with |
| 1516 | // the block for that code. |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 1517 | DefaultCaseBlock = SwitchSuccessor; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1518 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1519 | // Create a new block that will contain the switch statement. |
| 1520 | SwitchTerminatedBlock = createBlock(false); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1521 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1522 | // Now process the switch body. The code after the switch is the implicit |
| 1523 | // successor. |
| 1524 | Succ = SwitchSuccessor; |
| 1525 | BreakTargetBlock = SwitchSuccessor; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1526 | |
| 1527 | // When visiting the body, the case statements should automatically get linked |
| 1528 | // up to the switch. We also don't keep a pointer to the body, since all |
| 1529 | // control-flow from the switch goes to case/default statements. |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 1530 | assert(Terminator->getBody() && "switch must contain a non-NULL body"); |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1531 | Block = NULL; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1532 | CFGBlock *BodyBlock = addStmt(Terminator->getBody()); |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1533 | if (Block) { |
| 1534 | if (!FinishBlock(BodyBlock)) |
| 1535 | return 0; |
| 1536 | } |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1537 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1538 | // If we have no "default:" case, the default transition is to the code |
| 1539 | // following the switch body. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1540 | AddSuccessor(SwitchTerminatedBlock, DefaultCaseBlock); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1541 | |
Ted Kremenek | 49af7cb | 2007-08-27 19:46:09 +0000 | [diff] [blame] | 1542 | // Add the terminator and condition in the switch block. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1543 | SwitchTerminatedBlock->setTerminator(Terminator); |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 1544 | assert(Terminator->getCond() && "switch condition must be non-NULL"); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1545 | Block = SwitchTerminatedBlock; |
Ted Kremenek | 6b501eb | 2009-12-24 00:39:26 +0000 | [diff] [blame] | 1546 | Block = addStmt(Terminator->getCond()); |
| 1547 | |
| 1548 | // Finally, if the SwitchStmt contains a condition variable, add both the |
| 1549 | // SwitchStmt and the condition variable initialization to the CFG. |
| 1550 | if (VarDecl *VD = Terminator->getConditionVariable()) { |
| 1551 | if (Expr *Init = VD->getInit()) { |
| 1552 | autoCreateBlock(); |
| 1553 | AppendStmt(Block, Terminator, AddStmtChoice::AlwaysAdd); |
| 1554 | addStmt(Init); |
| 1555 | } |
| 1556 | } |
| 1557 | |
| 1558 | return Block; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1559 | } |
| 1560 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1561 | CFGBlock* CFGBuilder::VisitCaseStmt(CaseStmt* CS) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1562 | // CaseStmts are essentially labels, so they are the first statement in a |
| 1563 | // block. |
Ted Kremenek | 29ccaa1 | 2007-08-30 18:48:11 +0000 | [diff] [blame] | 1564 | |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1565 | if (CS->getSubStmt()) |
| 1566 | addStmt(CS->getSubStmt()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1567 | |
Ted Kremenek | 29ccaa1 | 2007-08-30 18:48:11 +0000 | [diff] [blame] | 1568 | CFGBlock* CaseBlock = Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1569 | if (!CaseBlock) |
| 1570 | CaseBlock = createBlock(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1571 | |
| 1572 | // Cases statements partition blocks, so this is the top of the basic block we |
| 1573 | // were processing (the "case XXX:" is the label). |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1574 | CaseBlock->setLabel(CS); |
| 1575 | |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1576 | if (!FinishBlock(CaseBlock)) |
| 1577 | return 0; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1578 | |
| 1579 | // Add this block to the list of successors for the block with the switch |
| 1580 | // statement. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1581 | assert(SwitchTerminatedBlock); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1582 | AddSuccessor(SwitchTerminatedBlock, CaseBlock); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1583 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1584 | // We set Block to NULL to allow lazy creation of a new block (if necessary) |
| 1585 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1586 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1587 | // This block is now the implicit successor of other blocks. |
| 1588 | Succ = CaseBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1589 | |
Ted Kremenek | 2677ea8 | 2008-03-15 07:45:02 +0000 | [diff] [blame] | 1590 | return CaseBlock; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1591 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1592 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1593 | CFGBlock* CFGBuilder::VisitDefaultStmt(DefaultStmt* Terminator) { |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1594 | if (Terminator->getSubStmt()) |
| 1595 | addStmt(Terminator->getSubStmt()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1596 | |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 1597 | DefaultCaseBlock = Block; |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1598 | |
| 1599 | if (!DefaultCaseBlock) |
| 1600 | DefaultCaseBlock = createBlock(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1601 | |
| 1602 | // Default statements partition blocks, so this is the top of the basic block |
| 1603 | // we were processing (the "default:" is the label). |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1604 | DefaultCaseBlock->setLabel(Terminator); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1605 | |
Ted Kremenek | 4e8df2e | 2009-05-02 00:13:27 +0000 | [diff] [blame] | 1606 | if (!FinishBlock(DefaultCaseBlock)) |
| 1607 | return 0; |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 1608 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1609 | // Unlike case statements, we don't add the default block to the successors |
| 1610 | // for the switch statement immediately. This is done when we finish |
| 1611 | // processing the switch statement. This allows for the default case |
| 1612 | // (including a fall-through to the code after the switch statement) to always |
| 1613 | // be the last successor of a switch-terminated block. |
| 1614 | |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 1615 | // We set Block to NULL to allow lazy creation of a new block (if necessary) |
| 1616 | Block = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1617 | |
Ted Kremenek | eef5a9a | 2008-02-13 22:05:39 +0000 | [diff] [blame] | 1618 | // This block is now the implicit successor of other blocks. |
| 1619 | Succ = DefaultCaseBlock; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1620 | |
| 1621 | return DefaultCaseBlock; |
Ted Kremenek | 295222c | 2008-02-13 21:46:34 +0000 | [diff] [blame] | 1622 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1623 | |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1624 | CFGBlock *CFGBuilder::VisitCXXTryStmt(CXXTryStmt *Terminator) { |
| 1625 | // "try"/"catch" is a control-flow statement. Thus we stop processing the |
| 1626 | // current block. |
| 1627 | CFGBlock* TrySuccessor = NULL; |
| 1628 | |
| 1629 | if (Block) { |
| 1630 | if (!FinishBlock(Block)) |
| 1631 | return 0; |
| 1632 | TrySuccessor = Block; |
| 1633 | } else TrySuccessor = Succ; |
| 1634 | |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 1635 | CFGBlock *PrevTryTerminatedBlock = TryTerminatedBlock; |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1636 | |
| 1637 | // Create a new block that will contain the try statement. |
Mike Stump | f00cca5 | 2010-01-20 01:30:58 +0000 | [diff] [blame] | 1638 | CFGBlock *NewTryTerminatedBlock = createBlock(false); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1639 | // Add the terminator in the try block. |
Mike Stump | f00cca5 | 2010-01-20 01:30:58 +0000 | [diff] [blame] | 1640 | NewTryTerminatedBlock->setTerminator(Terminator); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1641 | |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 1642 | bool HasCatchAll = false; |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1643 | for (unsigned h = 0; h <Terminator->getNumHandlers(); ++h) { |
| 1644 | // The code after the try is the implicit successor. |
| 1645 | Succ = TrySuccessor; |
| 1646 | CXXCatchStmt *CS = Terminator->getHandler(h); |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 1647 | if (CS->getExceptionDecl() == 0) { |
| 1648 | HasCatchAll = true; |
| 1649 | } |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1650 | Block = NULL; |
| 1651 | CFGBlock *CatchBlock = VisitCXXCatchStmt(CS); |
| 1652 | if (CatchBlock == 0) |
| 1653 | return 0; |
| 1654 | // Add this block to the list of successors for the block with the try |
| 1655 | // statement. |
Mike Stump | f00cca5 | 2010-01-20 01:30:58 +0000 | [diff] [blame] | 1656 | AddSuccessor(NewTryTerminatedBlock, CatchBlock); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1657 | } |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 1658 | if (!HasCatchAll) { |
| 1659 | if (PrevTryTerminatedBlock) |
Mike Stump | f00cca5 | 2010-01-20 01:30:58 +0000 | [diff] [blame] | 1660 | AddSuccessor(NewTryTerminatedBlock, PrevTryTerminatedBlock); |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 1661 | else |
Mike Stump | f00cca5 | 2010-01-20 01:30:58 +0000 | [diff] [blame] | 1662 | AddSuccessor(NewTryTerminatedBlock, &cfg->getExit()); |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 1663 | } |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1664 | |
| 1665 | // The code after the try is the implicit successor. |
| 1666 | Succ = TrySuccessor; |
| 1667 | |
Mike Stump | f00cca5 | 2010-01-20 01:30:58 +0000 | [diff] [blame] | 1668 | // Save the current "try" context. |
| 1669 | SaveAndRestore<CFGBlock*> save_try(TryTerminatedBlock); |
| 1670 | TryTerminatedBlock = NewTryTerminatedBlock; |
| 1671 | |
Ted Kremenek | 6db0ad3 | 2010-01-19 20:46:35 +0000 | [diff] [blame] | 1672 | assert(Terminator->getTryBlock() && "try must contain a non-NULL body"); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1673 | Block = NULL; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1674 | Block = addStmt(Terminator->getTryBlock()); |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1675 | return Block; |
| 1676 | } |
| 1677 | |
| 1678 | CFGBlock* CFGBuilder::VisitCXXCatchStmt(CXXCatchStmt* CS) { |
| 1679 | // CXXCatchStmt are treated like labels, so they are the first statement in a |
| 1680 | // block. |
| 1681 | |
| 1682 | if (CS->getHandlerBlock()) |
| 1683 | addStmt(CS->getHandlerBlock()); |
| 1684 | |
| 1685 | CFGBlock* CatchBlock = Block; |
| 1686 | if (!CatchBlock) |
| 1687 | CatchBlock = createBlock(); |
| 1688 | |
| 1689 | CatchBlock->setLabel(CS); |
| 1690 | |
| 1691 | if (!FinishBlock(CatchBlock)) |
| 1692 | return 0; |
| 1693 | |
| 1694 | // We set Block to NULL to allow lazy creation of a new block (if necessary) |
| 1695 | Block = NULL; |
| 1696 | |
| 1697 | return CatchBlock; |
| 1698 | } |
| 1699 | |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 1700 | CFGBlock* CFGBuilder::VisitIndirectGotoStmt(IndirectGotoStmt* I) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1701 | // Lazily create the indirect-goto dispatch block if there isn't one already. |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 1702 | CFGBlock* IBlock = cfg->getIndirectGotoBlock(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1703 | |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 1704 | if (!IBlock) { |
| 1705 | IBlock = createBlock(false); |
| 1706 | cfg->setIndirectGotoBlock(IBlock); |
| 1707 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1708 | |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 1709 | // IndirectGoto is a control-flow statement. Thus we stop processing the |
| 1710 | // current block and create a new one. |
Ted Kremenek | 4f88063 | 2009-07-17 22:18:43 +0000 | [diff] [blame] | 1711 | if (Block && !FinishBlock(Block)) |
| 1712 | return 0; |
| 1713 | |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 1714 | Block = createBlock(false); |
| 1715 | Block->setTerminator(I); |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1716 | AddSuccessor(Block, IBlock); |
Ted Kremenek | 19bb356 | 2007-08-28 19:26:49 +0000 | [diff] [blame] | 1717 | return addStmt(I->getTarget()); |
| 1718 | } |
| 1719 | |
Ted Kremenek | befef2f | 2007-08-23 21:26:19 +0000 | [diff] [blame] | 1720 | } // end anonymous namespace |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1721 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1722 | /// createBlock - Constructs and adds a new CFGBlock to the CFG. The block has |
| 1723 | /// no successors or predecessors. If this is the first block created in the |
| 1724 | /// CFG, it is automatically set to be the Entry and Exit of the CFG. |
Ted Kremenek | 9438252 | 2007-09-05 20:02:05 +0000 | [diff] [blame] | 1725 | CFGBlock* CFG::createBlock() { |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1726 | bool first_block = begin() == end(); |
| 1727 | |
| 1728 | // Create the block. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1729 | CFGBlock *Mem = getAllocator().Allocate<CFGBlock>(); |
| 1730 | new (Mem) CFGBlock(NumBlockIDs++, BlkBVC); |
| 1731 | Blocks.push_back(Mem, BlkBVC); |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1732 | |
| 1733 | // If this is the first block, set it as the Entry and Exit. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1734 | if (first_block) |
| 1735 | Entry = Exit = &back(); |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1736 | |
| 1737 | // Return the block. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1738 | return &back(); |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 1739 | } |
| 1740 | |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1741 | /// buildCFG - Constructs a CFG from an AST. Ownership of the returned |
| 1742 | /// CFG is returned to the caller. |
Mike Stump | b978a44 | 2010-01-21 02:21:40 +0000 | [diff] [blame] | 1743 | CFG* CFG::buildCFG(const Decl *D, Stmt* Statement, ASTContext *C, |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 1744 | bool AddEHEdges, bool AddScopes) { |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1745 | CFGBuilder Builder; |
Mike Stump | 4c45aa1 | 2010-01-21 15:20:48 +0000 | [diff] [blame] | 1746 | return Builder.buildCFG(D, Statement, C, AddEHEdges, AddScopes); |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 1747 | } |
| 1748 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1749 | //===----------------------------------------------------------------------===// |
| 1750 | // CFG: Queries for BlkExprs. |
| 1751 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 1752 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1753 | namespace { |
Ted Kremenek | 8694674 | 2008-01-17 20:48:37 +0000 | [diff] [blame] | 1754 | typedef llvm::DenseMap<const Stmt*,unsigned> BlkExprMapTy; |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1755 | } |
| 1756 | |
Ted Kremenek | 8a69366 | 2009-12-23 23:37:10 +0000 | [diff] [blame] | 1757 | static void FindSubExprAssignments(Stmt *S, |
| 1758 | llvm::SmallPtrSet<Expr*,50>& Set) { |
| 1759 | if (!S) |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1760 | return; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1761 | |
Ted Kremenek | 8a69366 | 2009-12-23 23:37:10 +0000 | [diff] [blame] | 1762 | for (Stmt::child_iterator I=S->child_begin(), E=S->child_end(); I!=E; ++I) { |
| 1763 | Stmt *child = *I; |
| 1764 | if (!child) |
| 1765 | continue; |
| 1766 | |
| 1767 | if (BinaryOperator* B = dyn_cast<BinaryOperator>(child)) |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1768 | if (B->isAssignmentOp()) Set.insert(B); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1769 | |
Ted Kremenek | 8a69366 | 2009-12-23 23:37:10 +0000 | [diff] [blame] | 1770 | FindSubExprAssignments(child, Set); |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1771 | } |
| 1772 | } |
| 1773 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1774 | static BlkExprMapTy* PopulateBlkExprMap(CFG& cfg) { |
| 1775 | BlkExprMapTy* M = new BlkExprMapTy(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1776 | |
| 1777 | // Look for assignments that are used as subexpressions. These are the only |
| 1778 | // assignments that we want to *possibly* register as a block-level |
| 1779 | // expression. Basically, if an assignment occurs both in a subexpression and |
| 1780 | // at the block-level, it is a block-level expression. |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1781 | llvm::SmallPtrSet<Expr*,50> SubExprAssignments; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1782 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1783 | for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1784 | for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1785 | FindSubExprAssignments(*BI, SubExprAssignments); |
Ted Kremenek | 8694674 | 2008-01-17 20:48:37 +0000 | [diff] [blame] | 1786 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1787 | for (CFG::iterator I=cfg.begin(), E=cfg.end(); I != E; ++I) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1788 | |
| 1789 | // Iterate over the statements again on identify the Expr* and Stmt* at the |
| 1790 | // block-level that are block-level expressions. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1791 | |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1792 | for (CFGBlock::iterator BI=(*I)->begin(), EI=(*I)->end(); BI != EI; ++BI) |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1793 | if (Expr* Exp = dyn_cast<Expr>(*BI)) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1794 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1795 | if (BinaryOperator* B = dyn_cast<BinaryOperator>(Exp)) { |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1796 | // Assignment expressions that are not nested within another |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1797 | // expression are really "statements" whose value is never used by |
| 1798 | // another expression. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1799 | if (B->isAssignmentOp() && !SubExprAssignments.count(Exp)) |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1800 | continue; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1801 | } else if (const StmtExpr* Terminator = dyn_cast<StmtExpr>(Exp)) { |
| 1802 | // Special handling for statement expressions. The last statement in |
| 1803 | // the statement expression is also a block-level expr. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1804 | const CompoundStmt* C = Terminator->getSubStmt(); |
Ted Kremenek | 8694674 | 2008-01-17 20:48:37 +0000 | [diff] [blame] | 1805 | if (!C->body_empty()) { |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1806 | unsigned x = M->size(); |
Ted Kremenek | 8694674 | 2008-01-17 20:48:37 +0000 | [diff] [blame] | 1807 | (*M)[C->body_back()] = x; |
| 1808 | } |
| 1809 | } |
Ted Kremenek | e2dcd78 | 2008-01-25 23:22:27 +0000 | [diff] [blame] | 1810 | |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1811 | unsigned x = M->size(); |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1812 | (*M)[Exp] = x; |
Ted Kremenek | 33d4aab | 2008-01-26 00:03:27 +0000 | [diff] [blame] | 1813 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1814 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1815 | // Look at terminators. The condition is a block-level expression. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1816 | |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1817 | Stmt* S = (*I)->getTerminatorCondition(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1818 | |
Ted Kremenek | 390e48b | 2008-11-12 21:11:49 +0000 | [diff] [blame] | 1819 | if (S && M->find(S) == M->end()) { |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1820 | unsigned x = M->size(); |
Ted Kremenek | 390e48b | 2008-11-12 21:11:49 +0000 | [diff] [blame] | 1821 | (*M)[S] = x; |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1822 | } |
| 1823 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1824 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1825 | return M; |
| 1826 | } |
| 1827 | |
Ted Kremenek | 8694674 | 2008-01-17 20:48:37 +0000 | [diff] [blame] | 1828 | CFG::BlkExprNumTy CFG::getBlkExprNum(const Stmt* S) { |
| 1829 | assert(S != NULL); |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1830 | if (!BlkExprMap) { BlkExprMap = (void*) PopulateBlkExprMap(*this); } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1831 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1832 | BlkExprMapTy* M = reinterpret_cast<BlkExprMapTy*>(BlkExprMap); |
Ted Kremenek | 8694674 | 2008-01-17 20:48:37 +0000 | [diff] [blame] | 1833 | BlkExprMapTy::iterator I = M->find(S); |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1834 | return (I == M->end()) ? CFG::BlkExprNumTy() : CFG::BlkExprNumTy(I->second); |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1835 | } |
| 1836 | |
| 1837 | unsigned CFG::getNumBlkExprs() { |
| 1838 | if (const BlkExprMapTy* M = reinterpret_cast<const BlkExprMapTy*>(BlkExprMap)) |
| 1839 | return M->size(); |
| 1840 | else { |
| 1841 | // We assume callers interested in the number of BlkExprs will want |
| 1842 | // the map constructed if it doesn't already exist. |
| 1843 | BlkExprMap = (void*) PopulateBlkExprMap(*this); |
| 1844 | return reinterpret_cast<BlkExprMapTy*>(BlkExprMap)->size(); |
| 1845 | } |
| 1846 | } |
| 1847 | |
Ted Kremenek | 274f433 | 2008-04-28 18:00:46 +0000 | [diff] [blame] | 1848 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 274f433 | 2008-04-28 18:00:46 +0000 | [diff] [blame] | 1849 | // Cleanup: CFG dstor. |
| 1850 | //===----------------------------------------------------------------------===// |
| 1851 | |
Ted Kremenek | 63f5887 | 2007-10-01 19:33:33 +0000 | [diff] [blame] | 1852 | CFG::~CFG() { |
| 1853 | delete reinterpret_cast<const BlkExprMapTy*>(BlkExprMap); |
| 1854 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1855 | |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 1856 | //===----------------------------------------------------------------------===// |
| 1857 | // CFG pretty printing |
| 1858 | //===----------------------------------------------------------------------===// |
| 1859 | |
Ted Kremenek | e8ee26b | 2007-08-22 18:22:34 +0000 | [diff] [blame] | 1860 | namespace { |
| 1861 | |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 1862 | class StmtPrinterHelper : public PrinterHelper { |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1863 | typedef llvm::DenseMap<Stmt*,std::pair<unsigned,unsigned> > StmtMapTy; |
| 1864 | StmtMapTy StmtMap; |
| 1865 | signed CurrentBlock; |
| 1866 | unsigned CurrentStmt; |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 1867 | const LangOptions &LangOpts; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1868 | public: |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 1869 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 1870 | StmtPrinterHelper(const CFG* cfg, const LangOptions &LO) |
| 1871 | : CurrentBlock(0), CurrentStmt(0), LangOpts(LO) { |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1872 | for (CFG::const_iterator I = cfg->begin(), E = cfg->end(); I != E; ++I ) { |
| 1873 | unsigned j = 1; |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1874 | for (CFGBlock::const_iterator BI = (*I)->begin(), BEnd = (*I)->end() ; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1875 | BI != BEnd; ++BI, ++j ) |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 1876 | StmtMap[*BI] = std::make_pair((*I)->getBlockID(),j); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1877 | } |
| 1878 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1879 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1880 | virtual ~StmtPrinterHelper() {} |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1881 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 1882 | const LangOptions &getLangOpts() const { return LangOpts; } |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1883 | void setBlockID(signed i) { CurrentBlock = i; } |
| 1884 | void setStmtID(unsigned i) { CurrentStmt = i; } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1885 | |
Ted Kremenek | a95d375 | 2008-09-13 05:16:45 +0000 | [diff] [blame] | 1886 | virtual bool handledStmt(Stmt* Terminator, llvm::raw_ostream& OS) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1887 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1888 | StmtMapTy::iterator I = StmtMap.find(Terminator); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1889 | |
| 1890 | if (I == StmtMap.end()) |
| 1891 | return false; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1892 | |
| 1893 | if (CurrentBlock >= 0 && I->second.first == (unsigned) CurrentBlock |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1894 | && I->second.second == CurrentStmt) { |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1895 | return false; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1896 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1897 | |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1898 | OS << "[B" << I->second.first << "." << I->second.second << "]"; |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 1899 | return true; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1900 | } |
| 1901 | }; |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 1902 | } // end anonymous namespace |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1903 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 1904 | |
| 1905 | namespace { |
Kovarththanan Rajaratnam | ba5fb5a | 2009-11-28 06:07:30 +0000 | [diff] [blame] | 1906 | class CFGBlockTerminatorPrint |
Ted Kremenek | 6fa9b88 | 2008-01-08 18:15:10 +0000 | [diff] [blame] | 1907 | : public StmtVisitor<CFGBlockTerminatorPrint,void> { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1908 | |
Ted Kremenek | a95d375 | 2008-09-13 05:16:45 +0000 | [diff] [blame] | 1909 | llvm::raw_ostream& OS; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1910 | StmtPrinterHelper* Helper; |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1911 | PrintingPolicy Policy; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 1912 | public: |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1913 | CFGBlockTerminatorPrint(llvm::raw_ostream& os, StmtPrinterHelper* helper, |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 1914 | const PrintingPolicy &Policy) |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1915 | : OS(os), Helper(helper), Policy(Policy) {} |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1916 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1917 | void VisitIfStmt(IfStmt* I) { |
| 1918 | OS << "if "; |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1919 | I->getCond()->printPretty(OS,Helper,Policy); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1920 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1921 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1922 | // Default case. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1923 | void VisitStmt(Stmt* Terminator) { |
| 1924 | Terminator->printPretty(OS, Helper, Policy); |
| 1925 | } |
| 1926 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1927 | void VisitForStmt(ForStmt* F) { |
| 1928 | OS << "for (" ; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1929 | if (F->getInit()) |
| 1930 | OS << "..."; |
Ted Kremenek | 535bb20 | 2007-08-30 21:28:02 +0000 | [diff] [blame] | 1931 | OS << "; "; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1932 | if (Stmt* C = F->getCond()) |
| 1933 | C->printPretty(OS, Helper, Policy); |
Ted Kremenek | 535bb20 | 2007-08-30 21:28:02 +0000 | [diff] [blame] | 1934 | OS << "; "; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1935 | if (F->getInc()) |
| 1936 | OS << "..."; |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 1937 | OS << ")"; |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1938 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1939 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1940 | void VisitWhileStmt(WhileStmt* W) { |
| 1941 | OS << "while " ; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1942 | if (Stmt* C = W->getCond()) |
| 1943 | C->printPretty(OS, Helper, Policy); |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1944 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1945 | |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 1946 | void VisitDoStmt(DoStmt* D) { |
| 1947 | OS << "do ... while "; |
Ted Kremenek | 3fa1e4b | 2010-01-19 20:52:05 +0000 | [diff] [blame] | 1948 | if (Stmt* C = D->getCond()) |
| 1949 | C->printPretty(OS, Helper, Policy); |
Ted Kremenek | 9da2fb7 | 2007-08-27 21:27:44 +0000 | [diff] [blame] | 1950 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1951 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 1952 | void VisitSwitchStmt(SwitchStmt* Terminator) { |
Ted Kremenek | 9da2fb7 | 2007-08-27 21:27:44 +0000 | [diff] [blame] | 1953 | OS << "switch "; |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1954 | Terminator->getCond()->printPretty(OS, Helper, Policy); |
Ted Kremenek | 9da2fb7 | 2007-08-27 21:27:44 +0000 | [diff] [blame] | 1955 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1956 | |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 1957 | void VisitCXXTryStmt(CXXTryStmt* CS) { |
| 1958 | OS << "try ..."; |
| 1959 | } |
| 1960 | |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1961 | void VisitConditionalOperator(ConditionalOperator* C) { |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1962 | C->getCond()->printPretty(OS, Helper, Policy); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1963 | OS << " ? ... : ..."; |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1964 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1965 | |
Ted Kremenek | aeddbf6 | 2007-08-31 22:29:13 +0000 | [diff] [blame] | 1966 | void VisitChooseExpr(ChooseExpr* C) { |
| 1967 | OS << "__builtin_choose_expr( "; |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1968 | C->getCond()->printPretty(OS, Helper, Policy); |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 1969 | OS << " )"; |
Ted Kremenek | aeddbf6 | 2007-08-31 22:29:13 +0000 | [diff] [blame] | 1970 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1971 | |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 1972 | void VisitIndirectGotoStmt(IndirectGotoStmt* I) { |
| 1973 | OS << "goto *"; |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1974 | I->getTarget()->printPretty(OS, Helper, Policy); |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 1975 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1976 | |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1977 | void VisitBinaryOperator(BinaryOperator* B) { |
| 1978 | if (!B->isLogicalOp()) { |
| 1979 | VisitExpr(B); |
| 1980 | return; |
| 1981 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1982 | |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1983 | B->getLHS()->printPretty(OS, Helper, Policy); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1984 | |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1985 | switch (B->getOpcode()) { |
| 1986 | case BinaryOperator::LOr: |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 1987 | OS << " || ..."; |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1988 | return; |
| 1989 | case BinaryOperator::LAnd: |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 1990 | OS << " && ..."; |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1991 | return; |
| 1992 | default: |
| 1993 | assert(false && "Invalid logical operator."); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1994 | } |
Ted Kremenek | 805e9a8 | 2007-08-31 21:49:40 +0000 | [diff] [blame] | 1995 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1996 | |
Ted Kremenek | 0b1d9b7 | 2007-08-27 21:54:41 +0000 | [diff] [blame] | 1997 | void VisitExpr(Expr* E) { |
Douglas Gregor | d249e1d1f | 2009-05-29 20:38:28 +0000 | [diff] [blame] | 1998 | E->printPretty(OS, Helper, Policy); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 1999 | } |
Ted Kremenek | d4fdee3 | 2007-08-23 21:42:29 +0000 | [diff] [blame] | 2000 | }; |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2001 | } // end anonymous namespace |
| 2002 | |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2003 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2004 | static void print_stmt(llvm::raw_ostream &OS, StmtPrinterHelper* Helper, |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 2005 | const CFGElement &E) { |
| 2006 | Stmt *Terminator = E; |
| 2007 | |
| 2008 | if (E.asStartScope()) { |
| 2009 | OS << "start scope\n"; |
| 2010 | return; |
| 2011 | } |
| 2012 | if (E.asEndScope()) { |
| 2013 | OS << "end scope\n"; |
| 2014 | return; |
| 2015 | } |
| 2016 | |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2017 | if (Helper) { |
| 2018 | // special printing for statement-expressions. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2019 | if (StmtExpr* SE = dyn_cast<StmtExpr>(Terminator)) { |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2020 | CompoundStmt* Sub = SE->getSubStmt(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2021 | |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2022 | if (Sub->child_begin() != Sub->child_end()) { |
Ted Kremenek | 60266e8 | 2007-08-31 22:47:06 +0000 | [diff] [blame] | 2023 | OS << "({ ... ; "; |
Ted Kremenek | 7a9d9d7 | 2007-10-29 20:41:04 +0000 | [diff] [blame] | 2024 | Helper->handledStmt(*SE->getSubStmt()->body_rbegin(),OS); |
Ted Kremenek | 60266e8 | 2007-08-31 22:47:06 +0000 | [diff] [blame] | 2025 | OS << " })\n"; |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2026 | return; |
| 2027 | } |
| 2028 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2029 | |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2030 | // special printing for comma expressions. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2031 | if (BinaryOperator* B = dyn_cast<BinaryOperator>(Terminator)) { |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2032 | if (B->getOpcode() == BinaryOperator::Comma) { |
| 2033 | OS << "... , "; |
| 2034 | Helper->handledStmt(B->getRHS(),OS); |
| 2035 | OS << '\n'; |
| 2036 | return; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2037 | } |
| 2038 | } |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2039 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2040 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2041 | Terminator->printPretty(OS, Helper, PrintingPolicy(Helper->getLangOpts())); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2042 | |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2043 | // Expressions need a newline. |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2044 | if (isa<Expr>(Terminator)) OS << '\n'; |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2045 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2046 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2047 | static void print_block(llvm::raw_ostream& OS, const CFG* cfg, |
| 2048 | const CFGBlock& B, |
| 2049 | StmtPrinterHelper* Helper, bool print_edges) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2050 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2051 | if (Helper) Helper->setBlockID(B.getBlockID()); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2052 | |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2053 | // Print the header. |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2054 | OS << "\n [ B" << B.getBlockID(); |
| 2055 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2056 | if (&B == &cfg->getEntry()) |
| 2057 | OS << " (ENTRY) ]\n"; |
| 2058 | else if (&B == &cfg->getExit()) |
| 2059 | OS << " (EXIT) ]\n"; |
| 2060 | else if (&B == cfg->getIndirectGotoBlock()) |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2061 | OS << " (INDIRECT GOTO DISPATCH) ]\n"; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2062 | else |
| 2063 | OS << " ]\n"; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2064 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2065 | // Print the label of this block. |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 2066 | if (Stmt* Label = const_cast<Stmt*>(B.getLabel())) { |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2067 | |
| 2068 | if (print_edges) |
| 2069 | OS << " "; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2070 | |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 2071 | if (LabelStmt* L = dyn_cast<LabelStmt>(Label)) |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2072 | OS << L->getName(); |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 2073 | else if (CaseStmt* C = dyn_cast<CaseStmt>(Label)) { |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2074 | OS << "case "; |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2075 | C->getLHS()->printPretty(OS, Helper, |
| 2076 | PrintingPolicy(Helper->getLangOpts())); |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2077 | if (C->getRHS()) { |
| 2078 | OS << " ... "; |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2079 | C->getRHS()->printPretty(OS, Helper, |
| 2080 | PrintingPolicy(Helper->getLangOpts())); |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2081 | } |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 2082 | } else if (isa<DefaultStmt>(Label)) |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2083 | OS << "default"; |
Mike Stump | 079bd72 | 2010-01-19 22:00:14 +0000 | [diff] [blame] | 2084 | else if (CXXCatchStmt *CS = dyn_cast<CXXCatchStmt>(Label)) { |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 2085 | OS << "catch ("; |
Mike Stump | a1f9363 | 2010-01-20 01:15:34 +0000 | [diff] [blame] | 2086 | if (CS->getExceptionDecl()) |
| 2087 | CS->getExceptionDecl()->print(OS, PrintingPolicy(Helper->getLangOpts()), |
| 2088 | 0); |
| 2089 | else |
| 2090 | OS << "..."; |
Mike Stump | 5d1d202 | 2010-01-19 02:20:09 +0000 | [diff] [blame] | 2091 | OS << ")"; |
| 2092 | |
| 2093 | } else |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2094 | assert(false && "Invalid label statement in CFGBlock."); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2095 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2096 | OS << ":\n"; |
| 2097 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2098 | |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 2099 | // Iterate through the statements in the block and print them. |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 2100 | unsigned j = 1; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2101 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2102 | for (CFGBlock::const_iterator I = B.begin(), E = B.end() ; |
| 2103 | I != E ; ++I, ++j ) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2104 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2105 | // Print the statement # in the basic block and the statement itself. |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2106 | if (print_edges) |
| 2107 | OS << " "; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2108 | |
Ted Kremenek | a95d375 | 2008-09-13 05:16:45 +0000 | [diff] [blame] | 2109 | OS << llvm::format("%3d", j) << ": "; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2110 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2111 | if (Helper) |
| 2112 | Helper->setStmtID(j); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2113 | |
Ted Kremenek | 1c29bba | 2007-08-31 22:26:13 +0000 | [diff] [blame] | 2114 | print_stmt(OS,Helper,*I); |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 2115 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2116 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2117 | // Print the terminator of this block. |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2118 | if (B.getTerminator()) { |
| 2119 | if (print_edges) |
| 2120 | OS << " "; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2121 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2122 | OS << " T: "; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2123 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2124 | if (Helper) Helper->setBlockID(-1); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2125 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2126 | CFGBlockTerminatorPrint TPrinter(OS, Helper, |
| 2127 | PrintingPolicy(Helper->getLangOpts())); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2128 | TPrinter.Visit(const_cast<Stmt*>(B.getTerminator())); |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 2129 | OS << '\n'; |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 2130 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2131 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2132 | if (print_edges) { |
| 2133 | // Print the predecessors of this block. |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2134 | OS << " Predecessors (" << B.pred_size() << "):"; |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2135 | unsigned i = 0; |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2136 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2137 | for (CFGBlock::const_pred_iterator I = B.pred_begin(), E = B.pred_end(); |
| 2138 | I != E; ++I, ++i) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2139 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2140 | if (i == 8 || (i-8) == 0) |
| 2141 | OS << "\n "; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2142 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2143 | OS << " B" << (*I)->getBlockID(); |
| 2144 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2145 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2146 | OS << '\n'; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2147 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2148 | // Print the successors of this block. |
| 2149 | OS << " Successors (" << B.succ_size() << "):"; |
| 2150 | i = 0; |
| 2151 | |
| 2152 | for (CFGBlock::const_succ_iterator I = B.succ_begin(), E = B.succ_end(); |
| 2153 | I != E; ++I, ++i) { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2154 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2155 | if (i == 8 || (i-8) % 10 == 0) |
| 2156 | OS << "\n "; |
| 2157 | |
Mike Stump | e5af3ce | 2009-07-20 23:24:15 +0000 | [diff] [blame] | 2158 | if (*I) |
| 2159 | OS << " B" << (*I)->getBlockID(); |
| 2160 | else |
| 2161 | OS << " NULL"; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2162 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2163 | |
Ted Kremenek | 9cffe73 | 2007-08-29 23:20:49 +0000 | [diff] [blame] | 2164 | OS << '\n'; |
Ted Kremenek | fddd518 | 2007-08-21 21:42:03 +0000 | [diff] [blame] | 2165 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2166 | } |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2167 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2168 | |
| 2169 | /// dump - A simple pretty printer of a CFG that outputs to stderr. |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2170 | void CFG::dump(const LangOptions &LO) const { print(llvm::errs(), LO); } |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2171 | |
| 2172 | /// print - A simple pretty printer of a CFG that outputs to an ostream. |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2173 | void CFG::print(llvm::raw_ostream &OS, const LangOptions &LO) const { |
| 2174 | StmtPrinterHelper Helper(this, LO); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2175 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2176 | // Print the entry block. |
| 2177 | print_block(OS, this, getEntry(), &Helper, true); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2178 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2179 | // Iterate through the CFGBlocks and print them one by one. |
| 2180 | for (const_iterator I = Blocks.begin(), E = Blocks.end() ; I != E ; ++I) { |
| 2181 | // Skip the entry block, because we already printed it. |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 2182 | if (&(**I) == &getEntry() || &(**I) == &getExit()) |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2183 | continue; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2184 | |
Ted Kremenek | ee82d9b | 2009-10-12 20:55:07 +0000 | [diff] [blame] | 2185 | print_block(OS, this, **I, &Helper, true); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2186 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2187 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2188 | // Print the exit block. |
| 2189 | print_block(OS, this, getExit(), &Helper, true); |
Ted Kremenek | d017243 | 2008-11-24 20:50:24 +0000 | [diff] [blame] | 2190 | OS.flush(); |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2191 | } |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2192 | |
| 2193 | /// dump - A simply pretty printer of a CFGBlock that outputs to stderr. |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2194 | void CFGBlock::dump(const CFG* cfg, const LangOptions &LO) const { |
| 2195 | print(llvm::errs(), cfg, LO); |
| 2196 | } |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2197 | |
| 2198 | /// print - A simple pretty printer of a CFGBlock that outputs to an ostream. |
| 2199 | /// Generally this will only be called from CFG::print. |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2200 | void CFGBlock::print(llvm::raw_ostream& OS, const CFG* cfg, |
| 2201 | const LangOptions &LO) const { |
| 2202 | StmtPrinterHelper Helper(cfg, LO); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2203 | print_block(OS, cfg, *this, &Helper, true); |
Ted Kremenek | 026473c | 2007-08-23 16:51:22 +0000 | [diff] [blame] | 2204 | } |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2205 | |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 2206 | /// printTerminator - A simple pretty printer of the terminator of a CFGBlock. |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2207 | void CFGBlock::printTerminator(llvm::raw_ostream &OS, |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2208 | const LangOptions &LO) const { |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2209 | CFGBlockTerminatorPrint TPrinter(OS, NULL, PrintingPolicy(LO)); |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 2210 | TPrinter.Visit(const_cast<Stmt*>(getTerminator())); |
| 2211 | } |
| 2212 | |
Ted Kremenek | 390e48b | 2008-11-12 21:11:49 +0000 | [diff] [blame] | 2213 | Stmt* CFGBlock::getTerminatorCondition() { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2214 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2215 | if (!Terminator) |
| 2216 | return NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2217 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2218 | Expr* E = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2219 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2220 | switch (Terminator->getStmtClass()) { |
| 2221 | default: |
| 2222 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2223 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2224 | case Stmt::ForStmtClass: |
| 2225 | E = cast<ForStmt>(Terminator)->getCond(); |
| 2226 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2227 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2228 | case Stmt::WhileStmtClass: |
| 2229 | E = cast<WhileStmt>(Terminator)->getCond(); |
| 2230 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2231 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2232 | case Stmt::DoStmtClass: |
| 2233 | E = cast<DoStmt>(Terminator)->getCond(); |
| 2234 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2235 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2236 | case Stmt::IfStmtClass: |
| 2237 | E = cast<IfStmt>(Terminator)->getCond(); |
| 2238 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2239 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2240 | case Stmt::ChooseExprClass: |
| 2241 | E = cast<ChooseExpr>(Terminator)->getCond(); |
| 2242 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2243 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2244 | case Stmt::IndirectGotoStmtClass: |
| 2245 | E = cast<IndirectGotoStmt>(Terminator)->getTarget(); |
| 2246 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2247 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2248 | case Stmt::SwitchStmtClass: |
| 2249 | E = cast<SwitchStmt>(Terminator)->getCond(); |
| 2250 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2251 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2252 | case Stmt::ConditionalOperatorClass: |
| 2253 | E = cast<ConditionalOperator>(Terminator)->getCond(); |
| 2254 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2255 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2256 | case Stmt::BinaryOperatorClass: // '&&' and '||' |
| 2257 | E = cast<BinaryOperator>(Terminator)->getLHS(); |
Ted Kremenek | 390e48b | 2008-11-12 21:11:49 +0000 | [diff] [blame] | 2258 | break; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2259 | |
Ted Kremenek | 390e48b | 2008-11-12 21:11:49 +0000 | [diff] [blame] | 2260 | case Stmt::ObjCForCollectionStmtClass: |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2261 | return Terminator; |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2262 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2263 | |
Ted Kremenek | 411cdee | 2008-04-16 21:10:48 +0000 | [diff] [blame] | 2264 | return E ? E->IgnoreParens() : NULL; |
| 2265 | } |
| 2266 | |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2267 | bool CFGBlock::hasBinaryBranchTerminator() const { |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2268 | |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2269 | if (!Terminator) |
| 2270 | return false; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2271 | |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2272 | Expr* E = NULL; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2273 | |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2274 | switch (Terminator->getStmtClass()) { |
| 2275 | default: |
| 2276 | return false; |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2277 | |
| 2278 | case Stmt::ForStmtClass: |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2279 | case Stmt::WhileStmtClass: |
| 2280 | case Stmt::DoStmtClass: |
| 2281 | case Stmt::IfStmtClass: |
| 2282 | case Stmt::ChooseExprClass: |
| 2283 | case Stmt::ConditionalOperatorClass: |
| 2284 | case Stmt::BinaryOperatorClass: |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2285 | return true; |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2286 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2287 | |
Ted Kremenek | 9c2535a | 2008-05-16 16:06:00 +0000 | [diff] [blame] | 2288 | return E ? E->IgnoreParens() : NULL; |
| 2289 | } |
| 2290 | |
Ted Kremenek | a292585 | 2008-01-30 23:02:42 +0000 | [diff] [blame] | 2291 | |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2292 | //===----------------------------------------------------------------------===// |
| 2293 | // CFG Graphviz Visualization |
| 2294 | //===----------------------------------------------------------------------===// |
| 2295 | |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2296 | |
| 2297 | #ifndef NDEBUG |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2298 | static StmtPrinterHelper* GraphHelper; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2299 | #endif |
| 2300 | |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2301 | void CFG::viewCFG(const LangOptions &LO) const { |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2302 | #ifndef NDEBUG |
Chris Lattner | e4f2142 | 2009-06-30 01:26:17 +0000 | [diff] [blame] | 2303 | StmtPrinterHelper H(this, LO); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2304 | GraphHelper = &H; |
| 2305 | llvm::ViewGraph(this,"CFG"); |
| 2306 | GraphHelper = NULL; |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2307 | #endif |
| 2308 | } |
| 2309 | |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2310 | namespace llvm { |
| 2311 | template<> |
| 2312 | struct DOTGraphTraits<const CFG*> : public DefaultDOTGraphTraits { |
Tobias Grosser | 006b0eb | 2009-11-30 14:16:05 +0000 | [diff] [blame] | 2313 | |
| 2314 | DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {} |
| 2315 | |
| 2316 | static std::string getNodeLabel(const CFGBlock* Node, const CFG* Graph) { |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2317 | |
Hartmut Kaiser | bd250b4 | 2007-09-16 00:28:28 +0000 | [diff] [blame] | 2318 | #ifndef NDEBUG |
Ted Kremenek | a95d375 | 2008-09-13 05:16:45 +0000 | [diff] [blame] | 2319 | std::string OutSStr; |
| 2320 | llvm::raw_string_ostream Out(OutSStr); |
Ted Kremenek | 42a509f | 2007-08-31 21:30:12 +0000 | [diff] [blame] | 2321 | print_block(Out,Graph, *Node, GraphHelper, false); |
Ted Kremenek | a95d375 | 2008-09-13 05:16:45 +0000 | [diff] [blame] | 2322 | std::string& OutStr = Out.str(); |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2323 | |
| 2324 | if (OutStr[0] == '\n') OutStr.erase(OutStr.begin()); |
| 2325 | |
| 2326 | // Process string output to make it nicer... |
| 2327 | for (unsigned i = 0; i != OutStr.length(); ++i) |
| 2328 | if (OutStr[i] == '\n') { // Left justify |
| 2329 | OutStr[i] = '\\'; |
| 2330 | OutStr.insert(OutStr.begin()+i+1, 'l'); |
| 2331 | } |
Mike Stump | 6d9828c | 2009-07-17 01:31:16 +0000 | [diff] [blame] | 2332 | |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2333 | return OutStr; |
Hartmut Kaiser | bd250b4 | 2007-09-16 00:28:28 +0000 | [diff] [blame] | 2334 | #else |
| 2335 | return ""; |
| 2336 | #endif |
Ted Kremenek | 7dba860 | 2007-08-29 21:56:09 +0000 | [diff] [blame] | 2337 | } |
| 2338 | }; |
| 2339 | } // end namespace llvm |