John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 1 | //===--- Tranforms.cpp - Tranformations to ARC mode -----------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 9 | |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 10 | #include "Transforms.h" |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 11 | #include "Internals.h" |
Benjamin Kramer | 471c8b4 | 2012-07-04 20:19:54 +0000 | [diff] [blame] | 12 | #include "clang/Analysis/DomainSpecific/CocoaConventions.h" |
| 13 | #include "clang/AST/ASTContext.h" |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 14 | #include "clang/AST/RecursiveASTVisitor.h" |
| 15 | #include "clang/AST/StmtVisitor.h" |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 16 | #include "clang/Basic/SourceManager.h" |
Benjamin Kramer | 471c8b4 | 2012-07-04 20:19:54 +0000 | [diff] [blame] | 17 | #include "clang/Lex/Lexer.h" |
| 18 | #include "clang/Sema/Sema.h" |
| 19 | #include "clang/Sema/SemaDiagnostic.h" |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 20 | #include "llvm/ADT/StringSwitch.h" |
| 21 | #include "llvm/ADT/DenseSet.h" |
| 22 | #include <map> |
| 23 | |
| 24 | using namespace clang; |
| 25 | using namespace arcmt; |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 26 | using namespace trans; |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 27 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 28 | ASTTraverser::~ASTTraverser() { } |
| 29 | |
Argyrios Kyrtzidis | 684190b | 2012-06-01 00:10:47 +0000 | [diff] [blame] | 30 | bool MigrationPass::CFBridgingFunctionsDefined() { |
| 31 | if (!EnableCFBridgeFns.hasValue()) |
| 32 | EnableCFBridgeFns = SemaRef.isKnownName("CFBridgingRetain") && |
| 33 | SemaRef.isKnownName("CFBridgingRelease"); |
| 34 | return *EnableCFBridgeFns; |
| 35 | } |
| 36 | |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 37 | //===----------------------------------------------------------------------===// |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 38 | // Helpers. |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 39 | //===----------------------------------------------------------------------===// |
| 40 | |
Argyrios Kyrtzidis | 12192cf | 2011-11-07 18:40:29 +0000 | [diff] [blame] | 41 | bool trans::canApplyWeak(ASTContext &Ctx, QualType type, |
| 42 | bool AllowOnUnknownClass) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 43 | if (!Ctx.getLangOpts().ObjCRuntimeHasWeak) |
Argyrios Kyrtzidis | 86625b5 | 2011-07-12 22:05:17 +0000 | [diff] [blame] | 44 | return false; |
| 45 | |
| 46 | QualType T = type; |
Argyrios Kyrtzidis | b0e1e12 | 2011-11-07 18:46:46 +0000 | [diff] [blame] | 47 | if (T.isNull()) |
| 48 | return false; |
| 49 | |
Argyrios Kyrtzidis | 2af504b | 2012-03-16 00:10:35 +0000 | [diff] [blame] | 50 | // iOS is always safe to use 'weak'. |
| 51 | if (Ctx.getTargetInfo().getTriple().getOS() == llvm::Triple::IOS) |
| 52 | AllowOnUnknownClass = true; |
| 53 | |
Argyrios Kyrtzidis | 86625b5 | 2011-07-12 22:05:17 +0000 | [diff] [blame] | 54 | while (const PointerType *ptr = T->getAs<PointerType>()) |
| 55 | T = ptr->getPointeeType(); |
| 56 | if (const ObjCObjectPointerType *ObjT = T->getAs<ObjCObjectPointerType>()) { |
| 57 | ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl(); |
Argyrios Kyrtzidis | 12192cf | 2011-11-07 18:40:29 +0000 | [diff] [blame] | 58 | if (!AllowOnUnknownClass && (!Class || Class->getName() == "NSObject")) |
Argyrios Kyrtzidis | 86625b5 | 2011-07-12 22:05:17 +0000 | [diff] [blame] | 59 | return false; // id/NSObject is not safe for weak. |
Douglas Gregor | 7723fec | 2011-12-15 20:29:51 +0000 | [diff] [blame] | 60 | if (!AllowOnUnknownClass && !Class->hasDefinition()) |
Argyrios Kyrtzidis | 5363e8d | 2011-07-12 22:16:25 +0000 | [diff] [blame] | 61 | return false; // forward classes are not verifiable, therefore not safe. |
Argyrios Kyrtzidis | 86625b5 | 2011-07-12 22:05:17 +0000 | [diff] [blame] | 62 | if (Class->isArcWeakrefUnavailable()) |
| 63 | return false; |
Argyrios Kyrtzidis | 86625b5 | 2011-07-12 22:05:17 +0000 | [diff] [blame] | 64 | } |
| 65 | |
| 66 | return true; |
| 67 | } |
| 68 | |
Argyrios Kyrtzidis | 1b8fbd3 | 2012-05-23 21:50:04 +0000 | [diff] [blame] | 69 | bool trans::isPlusOneAssign(const BinaryOperator *E) { |
| 70 | if (E->getOpcode() != BO_Assign) |
| 71 | return false; |
| 72 | |
| 73 | if (const ObjCMessageExpr * |
| 74 | ME = dyn_cast<ObjCMessageExpr>(E->getRHS()->IgnoreParenCasts())) |
| 75 | if (ME->getMethodFamily() == OMF_retain) |
| 76 | return true; |
| 77 | |
| 78 | if (const CallExpr * |
| 79 | callE = dyn_cast<CallExpr>(E->getRHS()->IgnoreParenCasts())) { |
| 80 | if (const FunctionDecl *FD = callE->getDirectCallee()) { |
| 81 | if (FD->getAttr<CFReturnsRetainedAttr>()) |
| 82 | return true; |
| 83 | |
| 84 | if (FD->isGlobal() && |
| 85 | FD->getIdentifier() && |
| 86 | FD->getParent()->isTranslationUnit() && |
| 87 | FD->getLinkage() == ExternalLinkage && |
| 88 | ento::cocoa::isRefType(callE->getType(), "CF", |
| 89 | FD->getIdentifier()->getName())) { |
| 90 | StringRef fname = FD->getIdentifier()->getName(); |
| 91 | if (fname.endswith("Retain") || |
| 92 | fname.find("Create") != StringRef::npos || |
| 93 | fname.find("Copy") != StringRef::npos) { |
| 94 | return true; |
| 95 | } |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | const ImplicitCastExpr *implCE = dyn_cast<ImplicitCastExpr>(E->getRHS()); |
| 101 | while (implCE && implCE->getCastKind() == CK_BitCast) |
| 102 | implCE = dyn_cast<ImplicitCastExpr>(implCE->getSubExpr()); |
| 103 | |
| 104 | if (implCE && implCE->getCastKind() == CK_ARCConsumeObject) |
| 105 | return true; |
| 106 | |
| 107 | return false; |
| 108 | } |
| 109 | |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 110 | /// \brief 'Loc' is the end of a statement range. This returns the location |
| 111 | /// immediately after the semicolon following the statement. |
| 112 | /// If no semicolon is found or the location is inside a macro, the returned |
| 113 | /// source location will be invalid. |
| 114 | SourceLocation trans::findLocationAfterSemi(SourceLocation loc, |
| 115 | ASTContext &Ctx) { |
Argyrios Kyrtzidis | aec230d | 2011-09-01 20:53:18 +0000 | [diff] [blame] | 116 | SourceLocation SemiLoc = findSemiAfterLocation(loc, Ctx); |
| 117 | if (SemiLoc.isInvalid()) |
| 118 | return SourceLocation(); |
Argyrios Kyrtzidis | a64ccef | 2011-09-19 20:40:19 +0000 | [diff] [blame] | 119 | return SemiLoc.getLocWithOffset(1); |
Argyrios Kyrtzidis | aec230d | 2011-09-01 20:53:18 +0000 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | /// \brief \arg Loc is the end of a statement range. This returns the location |
| 123 | /// of the semicolon following the statement. |
| 124 | /// If no semicolon is found or the location is inside a macro, the returned |
| 125 | /// source location will be invalid. |
| 126 | SourceLocation trans::findSemiAfterLocation(SourceLocation loc, |
| 127 | ASTContext &Ctx) { |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 128 | SourceManager &SM = Ctx.getSourceManager(); |
| 129 | if (loc.isMacroID()) { |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 130 | if (!Lexer::isAtEndOfMacroExpansion(loc, SM, Ctx.getLangOpts(), &loc)) |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 131 | return SourceLocation(); |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 132 | } |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 133 | loc = Lexer::getLocForEndOfToken(loc, /*Offset=*/0, SM, Ctx.getLangOpts()); |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 134 | |
| 135 | // Break down the source location. |
| 136 | std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(loc); |
| 137 | |
| 138 | // Try to load the file buffer. |
| 139 | bool invalidTemp = false; |
Chris Lattner | 5f9e272 | 2011-07-23 10:55:15 +0000 | [diff] [blame] | 140 | StringRef file = SM.getBufferData(locInfo.first, &invalidTemp); |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 141 | if (invalidTemp) |
| 142 | return SourceLocation(); |
| 143 | |
| 144 | const char *tokenBegin = file.data() + locInfo.second; |
| 145 | |
| 146 | // Lex from the start of the given location. |
| 147 | Lexer lexer(SM.getLocForStartOfFile(locInfo.first), |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 148 | Ctx.getLangOpts(), |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 149 | file.begin(), tokenBegin, file.end()); |
| 150 | Token tok; |
| 151 | lexer.LexFromRawLexer(tok); |
| 152 | if (tok.isNot(tok::semi)) |
| 153 | return SourceLocation(); |
| 154 | |
Argyrios Kyrtzidis | aec230d | 2011-09-01 20:53:18 +0000 | [diff] [blame] | 155 | return tok.getLocation(); |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | bool trans::hasSideEffects(Expr *E, ASTContext &Ctx) { |
| 159 | if (!E || !E->HasSideEffects(Ctx)) |
| 160 | return false; |
| 161 | |
| 162 | E = E->IgnoreParenCasts(); |
| 163 | ObjCMessageExpr *ME = dyn_cast<ObjCMessageExpr>(E); |
| 164 | if (!ME) |
| 165 | return true; |
| 166 | switch (ME->getMethodFamily()) { |
| 167 | case OMF_autorelease: |
| 168 | case OMF_dealloc: |
| 169 | case OMF_release: |
| 170 | case OMF_retain: |
| 171 | switch (ME->getReceiverKind()) { |
| 172 | case ObjCMessageExpr::SuperInstance: |
| 173 | return false; |
| 174 | case ObjCMessageExpr::Instance: |
| 175 | return hasSideEffects(ME->getInstanceReceiver(), Ctx); |
| 176 | default: |
| 177 | break; |
| 178 | } |
| 179 | break; |
| 180 | default: |
| 181 | break; |
| 182 | } |
| 183 | |
| 184 | return true; |
| 185 | } |
| 186 | |
Argyrios Kyrtzidis | 2c18ca0 | 2011-07-14 23:32:04 +0000 | [diff] [blame] | 187 | bool trans::isGlobalVar(Expr *E) { |
| 188 | E = E->IgnoreParenCasts(); |
| 189 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) |
Argyrios Kyrtzidis | 18fd0c6 | 2011-07-27 05:28:18 +0000 | [diff] [blame] | 190 | return DRE->getDecl()->getDeclContext()->isFileContext() && |
| 191 | DRE->getDecl()->getLinkage() == ExternalLinkage; |
Argyrios Kyrtzidis | 2c18ca0 | 2011-07-14 23:32:04 +0000 | [diff] [blame] | 192 | if (ConditionalOperator *condOp = dyn_cast<ConditionalOperator>(E)) |
| 193 | return isGlobalVar(condOp->getTrueExpr()) && |
| 194 | isGlobalVar(condOp->getFalseExpr()); |
| 195 | |
| 196 | return false; |
| 197 | } |
| 198 | |
Argyrios Kyrtzidis | 18fd0c6 | 2011-07-27 05:28:18 +0000 | [diff] [blame] | 199 | StringRef trans::getNilString(ASTContext &Ctx) { |
| 200 | if (Ctx.Idents.get("nil").hasMacroDefinition()) |
| 201 | return "nil"; |
| 202 | else |
| 203 | return "0"; |
| 204 | } |
| 205 | |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 206 | namespace { |
| 207 | |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 208 | class ReferenceClear : public RecursiveASTVisitor<ReferenceClear> { |
| 209 | ExprSet &Refs; |
| 210 | public: |
| 211 | ReferenceClear(ExprSet &refs) : Refs(refs) { } |
| 212 | bool VisitDeclRefExpr(DeclRefExpr *E) { Refs.erase(E); return true; } |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 213 | }; |
| 214 | |
| 215 | class ReferenceCollector : public RecursiveASTVisitor<ReferenceCollector> { |
| 216 | ValueDecl *Dcl; |
| 217 | ExprSet &Refs; |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 218 | |
| 219 | public: |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 220 | ReferenceCollector(ValueDecl *D, ExprSet &refs) |
| 221 | : Dcl(D), Refs(refs) { } |
| 222 | |
| 223 | bool VisitDeclRefExpr(DeclRefExpr *E) { |
| 224 | if (E->getDecl() == Dcl) |
| 225 | Refs.insert(E); |
| 226 | return true; |
| 227 | } |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 228 | }; |
| 229 | |
| 230 | class RemovablesCollector : public RecursiveASTVisitor<RemovablesCollector> { |
| 231 | ExprSet &Removables; |
| 232 | |
| 233 | public: |
| 234 | RemovablesCollector(ExprSet &removables) |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 235 | : Removables(removables) { } |
| 236 | |
| 237 | bool shouldWalkTypesOfTypeLocs() const { return false; } |
| 238 | |
| 239 | bool TraverseStmtExpr(StmtExpr *E) { |
| 240 | CompoundStmt *S = E->getSubStmt(); |
| 241 | for (CompoundStmt::body_iterator |
| 242 | I = S->body_begin(), E = S->body_end(); I != E; ++I) { |
| 243 | if (I != E - 1) |
| 244 | mark(*I); |
| 245 | TraverseStmt(*I); |
| 246 | } |
| 247 | return true; |
| 248 | } |
| 249 | |
| 250 | bool VisitCompoundStmt(CompoundStmt *S) { |
| 251 | for (CompoundStmt::body_iterator |
| 252 | I = S->body_begin(), E = S->body_end(); I != E; ++I) |
| 253 | mark(*I); |
| 254 | return true; |
| 255 | } |
| 256 | |
| 257 | bool VisitIfStmt(IfStmt *S) { |
| 258 | mark(S->getThen()); |
| 259 | mark(S->getElse()); |
| 260 | return true; |
| 261 | } |
| 262 | |
| 263 | bool VisitWhileStmt(WhileStmt *S) { |
| 264 | mark(S->getBody()); |
| 265 | return true; |
| 266 | } |
| 267 | |
| 268 | bool VisitDoStmt(DoStmt *S) { |
| 269 | mark(S->getBody()); |
| 270 | return true; |
| 271 | } |
| 272 | |
| 273 | bool VisitForStmt(ForStmt *S) { |
| 274 | mark(S->getInit()); |
| 275 | mark(S->getInc()); |
| 276 | mark(S->getBody()); |
| 277 | return true; |
| 278 | } |
| 279 | |
| 280 | private: |
| 281 | void mark(Stmt *S) { |
| 282 | if (!S) return; |
| 283 | |
John McCall | 7e5e5f4 | 2011-07-07 06:58:02 +0000 | [diff] [blame] | 284 | while (LabelStmt *Label = dyn_cast<LabelStmt>(S)) |
| 285 | S = Label->getSubStmt(); |
| 286 | S = S->IgnoreImplicit(); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 287 | if (Expr *E = dyn_cast<Expr>(S)) |
| 288 | Removables.insert(E); |
| 289 | } |
| 290 | }; |
| 291 | |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 292 | } // end anonymous namespace |
| 293 | |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 294 | void trans::clearRefsIn(Stmt *S, ExprSet &refs) { |
| 295 | ReferenceClear(refs).TraverseStmt(S); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 296 | } |
| 297 | |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 298 | void trans::collectRefs(ValueDecl *D, Stmt *S, ExprSet &refs) { |
| 299 | ReferenceCollector(D, refs).TraverseStmt(S); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 300 | } |
| 301 | |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 302 | void trans::collectRemovables(Stmt *S, ExprSet &exprs) { |
| 303 | RemovablesCollector(exprs).TraverseStmt(S); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 304 | } |
| 305 | |
| 306 | //===----------------------------------------------------------------------===// |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 307 | // MigrationContext |
| 308 | //===----------------------------------------------------------------------===// |
| 309 | |
| 310 | namespace { |
| 311 | |
| 312 | class ASTTransform : public RecursiveASTVisitor<ASTTransform> { |
| 313 | MigrationContext &MigrateCtx; |
Argyrios Kyrtzidis | a33849b | 2011-11-07 18:46:50 +0000 | [diff] [blame] | 314 | typedef RecursiveASTVisitor<ASTTransform> base; |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 315 | |
| 316 | public: |
| 317 | ASTTransform(MigrationContext &MigrateCtx) : MigrateCtx(MigrateCtx) { } |
| 318 | |
Argyrios Kyrtzidis | f38fa73 | 2011-11-06 18:58:03 +0000 | [diff] [blame] | 319 | bool shouldWalkTypesOfTypeLocs() const { return false; } |
| 320 | |
Argyrios Kyrtzidis | b0d5db1 | 2011-11-06 18:57:57 +0000 | [diff] [blame] | 321 | bool TraverseObjCImplementationDecl(ObjCImplementationDecl *D) { |
| 322 | ObjCImplementationContext ImplCtx(MigrateCtx, D); |
| 323 | for (MigrationContext::traverser_iterator |
| 324 | I = MigrateCtx.traversers_begin(), |
| 325 | E = MigrateCtx.traversers_end(); I != E; ++I) |
| 326 | (*I)->traverseObjCImplementation(ImplCtx); |
| 327 | |
Argyrios Kyrtzidis | a33849b | 2011-11-07 18:46:50 +0000 | [diff] [blame] | 328 | return base::TraverseObjCImplementationDecl(D); |
Argyrios Kyrtzidis | b0d5db1 | 2011-11-06 18:57:57 +0000 | [diff] [blame] | 329 | } |
| 330 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 331 | bool TraverseStmt(Stmt *rootS) { |
| 332 | if (!rootS) |
| 333 | return true; |
| 334 | |
| 335 | BodyContext BodyCtx(MigrateCtx, rootS); |
| 336 | for (MigrationContext::traverser_iterator |
| 337 | I = MigrateCtx.traversers_begin(), |
| 338 | E = MigrateCtx.traversers_end(); I != E; ++I) |
| 339 | (*I)->traverseBody(BodyCtx); |
| 340 | |
| 341 | return true; |
| 342 | } |
| 343 | }; |
| 344 | |
| 345 | } |
| 346 | |
| 347 | MigrationContext::~MigrationContext() { |
| 348 | for (traverser_iterator |
| 349 | I = traversers_begin(), E = traversers_end(); I != E; ++I) |
| 350 | delete *I; |
| 351 | } |
| 352 | |
Argyrios Kyrtzidis | 1fe4203 | 2011-11-04 23:43:03 +0000 | [diff] [blame] | 353 | bool MigrationContext::isGCOwnedNonObjC(QualType T) { |
| 354 | while (!T.isNull()) { |
| 355 | if (const AttributedType *AttrT = T->getAs<AttributedType>()) { |
| 356 | if (AttrT->getAttrKind() == AttributedType::attr_objc_ownership) |
| 357 | return !AttrT->getModifiedType()->isObjCRetainableType(); |
| 358 | } |
| 359 | |
| 360 | if (T->isArrayType()) |
| 361 | T = Pass.Ctx.getBaseElementType(T); |
| 362 | else if (const PointerType *PT = T->getAs<PointerType>()) |
| 363 | T = PT->getPointeeType(); |
| 364 | else if (const ReferenceType *RT = T->getAs<ReferenceType>()) |
| 365 | T = RT->getPointeeType(); |
| 366 | else |
| 367 | break; |
| 368 | } |
| 369 | |
| 370 | return false; |
| 371 | } |
| 372 | |
Argyrios Kyrtzidis | b0e1e12 | 2011-11-07 18:46:46 +0000 | [diff] [blame] | 373 | bool MigrationContext::rewritePropertyAttribute(StringRef fromAttr, |
| 374 | StringRef toAttr, |
| 375 | SourceLocation atLoc) { |
| 376 | if (atLoc.isMacroID()) |
| 377 | return false; |
| 378 | |
| 379 | SourceManager &SM = Pass.Ctx.getSourceManager(); |
| 380 | |
| 381 | // Break down the source location. |
| 382 | std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(atLoc); |
| 383 | |
| 384 | // Try to load the file buffer. |
| 385 | bool invalidTemp = false; |
| 386 | StringRef file = SM.getBufferData(locInfo.first, &invalidTemp); |
| 387 | if (invalidTemp) |
| 388 | return false; |
| 389 | |
| 390 | const char *tokenBegin = file.data() + locInfo.second; |
| 391 | |
| 392 | // Lex from the start of the given location. |
| 393 | Lexer lexer(SM.getLocForStartOfFile(locInfo.first), |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 394 | Pass.Ctx.getLangOpts(), |
Argyrios Kyrtzidis | b0e1e12 | 2011-11-07 18:46:46 +0000 | [diff] [blame] | 395 | file.begin(), tokenBegin, file.end()); |
| 396 | Token tok; |
| 397 | lexer.LexFromRawLexer(tok); |
| 398 | if (tok.isNot(tok::at)) return false; |
| 399 | lexer.LexFromRawLexer(tok); |
| 400 | if (tok.isNot(tok::raw_identifier)) return false; |
| 401 | if (StringRef(tok.getRawIdentifierData(), tok.getLength()) |
| 402 | != "property") |
| 403 | return false; |
| 404 | lexer.LexFromRawLexer(tok); |
| 405 | if (tok.isNot(tok::l_paren)) return false; |
| 406 | |
| 407 | Token BeforeTok = tok; |
| 408 | Token AfterTok; |
| 409 | AfterTok.startToken(); |
| 410 | SourceLocation AttrLoc; |
| 411 | |
| 412 | lexer.LexFromRawLexer(tok); |
| 413 | if (tok.is(tok::r_paren)) |
| 414 | return false; |
| 415 | |
| 416 | while (1) { |
| 417 | if (tok.isNot(tok::raw_identifier)) return false; |
| 418 | StringRef ident(tok.getRawIdentifierData(), tok.getLength()); |
| 419 | if (ident == fromAttr) { |
| 420 | if (!toAttr.empty()) { |
| 421 | Pass.TA.replaceText(tok.getLocation(), fromAttr, toAttr); |
| 422 | return true; |
| 423 | } |
| 424 | // We want to remove the attribute. |
| 425 | AttrLoc = tok.getLocation(); |
| 426 | } |
| 427 | |
| 428 | do { |
| 429 | lexer.LexFromRawLexer(tok); |
| 430 | if (AttrLoc.isValid() && AfterTok.is(tok::unknown)) |
| 431 | AfterTok = tok; |
| 432 | } while (tok.isNot(tok::comma) && tok.isNot(tok::r_paren)); |
| 433 | if (tok.is(tok::r_paren)) |
| 434 | break; |
| 435 | if (AttrLoc.isInvalid()) |
| 436 | BeforeTok = tok; |
| 437 | lexer.LexFromRawLexer(tok); |
| 438 | } |
| 439 | |
| 440 | if (toAttr.empty() && AttrLoc.isValid() && AfterTok.isNot(tok::unknown)) { |
| 441 | // We want to remove the attribute. |
| 442 | if (BeforeTok.is(tok::l_paren) && AfterTok.is(tok::r_paren)) { |
| 443 | Pass.TA.remove(SourceRange(BeforeTok.getLocation(), |
| 444 | AfterTok.getLocation())); |
| 445 | } else if (BeforeTok.is(tok::l_paren) && AfterTok.is(tok::comma)) { |
| 446 | Pass.TA.remove(SourceRange(AttrLoc, AfterTok.getLocation())); |
| 447 | } else { |
| 448 | Pass.TA.remove(SourceRange(BeforeTok.getLocation(), AttrLoc)); |
| 449 | } |
| 450 | |
| 451 | return true; |
| 452 | } |
| 453 | |
| 454 | return false; |
| 455 | } |
| 456 | |
Argyrios Kyrtzidis | 6da4274 | 2011-11-28 02:04:36 +0000 | [diff] [blame] | 457 | bool MigrationContext::addPropertyAttribute(StringRef attr, |
| 458 | SourceLocation atLoc) { |
| 459 | if (atLoc.isMacroID()) |
| 460 | return false; |
| 461 | |
| 462 | SourceManager &SM = Pass.Ctx.getSourceManager(); |
| 463 | |
| 464 | // Break down the source location. |
| 465 | std::pair<FileID, unsigned> locInfo = SM.getDecomposedLoc(atLoc); |
| 466 | |
| 467 | // Try to load the file buffer. |
| 468 | bool invalidTemp = false; |
| 469 | StringRef file = SM.getBufferData(locInfo.first, &invalidTemp); |
| 470 | if (invalidTemp) |
| 471 | return false; |
| 472 | |
| 473 | const char *tokenBegin = file.data() + locInfo.second; |
| 474 | |
| 475 | // Lex from the start of the given location. |
| 476 | Lexer lexer(SM.getLocForStartOfFile(locInfo.first), |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 477 | Pass.Ctx.getLangOpts(), |
Argyrios Kyrtzidis | 6da4274 | 2011-11-28 02:04:36 +0000 | [diff] [blame] | 478 | file.begin(), tokenBegin, file.end()); |
| 479 | Token tok; |
| 480 | lexer.LexFromRawLexer(tok); |
| 481 | if (tok.isNot(tok::at)) return false; |
| 482 | lexer.LexFromRawLexer(tok); |
| 483 | if (tok.isNot(tok::raw_identifier)) return false; |
| 484 | if (StringRef(tok.getRawIdentifierData(), tok.getLength()) |
| 485 | != "property") |
| 486 | return false; |
| 487 | lexer.LexFromRawLexer(tok); |
| 488 | |
| 489 | if (tok.isNot(tok::l_paren)) { |
| 490 | Pass.TA.insert(tok.getLocation(), std::string("(") + attr.str() + ") "); |
| 491 | return true; |
| 492 | } |
| 493 | |
| 494 | lexer.LexFromRawLexer(tok); |
| 495 | if (tok.is(tok::r_paren)) { |
| 496 | Pass.TA.insert(tok.getLocation(), attr); |
| 497 | return true; |
| 498 | } |
| 499 | |
| 500 | if (tok.isNot(tok::raw_identifier)) return false; |
| 501 | |
| 502 | Pass.TA.insert(tok.getLocation(), std::string(attr) + ", "); |
| 503 | return true; |
| 504 | } |
| 505 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 506 | void MigrationContext::traverse(TranslationUnitDecl *TU) { |
Argyrios Kyrtzidis | f38fa73 | 2011-11-06 18:58:03 +0000 | [diff] [blame] | 507 | for (traverser_iterator |
| 508 | I = traversers_begin(), E = traversers_end(); I != E; ++I) |
| 509 | (*I)->traverseTU(*this); |
| 510 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 511 | ASTTransform(*this).TraverseDecl(TU); |
| 512 | } |
| 513 | |
Fariborz Jahanian | bbdfad5 | 2012-01-26 20:57:58 +0000 | [diff] [blame] | 514 | static void GCRewriteFinalize(MigrationPass &pass) { |
| 515 | ASTContext &Ctx = pass.Ctx; |
| 516 | TransformActions &TA = pass.TA; |
| 517 | DeclContext *DC = Ctx.getTranslationUnitDecl(); |
| 518 | Selector FinalizeSel = |
| 519 | Ctx.Selectors.getNullarySelector(&pass.Ctx.Idents.get("finalize")); |
| 520 | |
| 521 | typedef DeclContext::specific_decl_iterator<ObjCImplementationDecl> |
| 522 | impl_iterator; |
| 523 | for (impl_iterator I = impl_iterator(DC->decls_begin()), |
| 524 | E = impl_iterator(DC->decls_end()); I != E; ++I) { |
| 525 | for (ObjCImplementationDecl::instmeth_iterator |
David Blaikie | 262bc18 | 2012-04-30 02:36:29 +0000 | [diff] [blame] | 526 | MI = I->instmeth_begin(), |
| 527 | ME = I->instmeth_end(); MI != ME; ++MI) { |
Fariborz Jahanian | bbdfad5 | 2012-01-26 20:57:58 +0000 | [diff] [blame] | 528 | ObjCMethodDecl *MD = *MI; |
| 529 | if (!MD->hasBody()) |
| 530 | continue; |
| 531 | |
| 532 | if (MD->isInstanceMethod() && MD->getSelector() == FinalizeSel) { |
| 533 | ObjCMethodDecl *FinalizeM = MD; |
| 534 | Transaction Trans(TA); |
| 535 | TA.insert(FinalizeM->getSourceRange().getBegin(), |
| 536 | "#if !__has_feature(objc_arc)\n"); |
| 537 | CharSourceRange::getTokenRange(FinalizeM->getSourceRange()); |
| 538 | const SourceManager &SM = pass.Ctx.getSourceManager(); |
David Blaikie | 4e4d084 | 2012-03-11 07:00:24 +0000 | [diff] [blame] | 539 | const LangOptions &LangOpts = pass.Ctx.getLangOpts(); |
Fariborz Jahanian | bbdfad5 | 2012-01-26 20:57:58 +0000 | [diff] [blame] | 540 | bool Invalid; |
| 541 | std::string str = "\n#endif\n"; |
| 542 | str += Lexer::getSourceText( |
| 543 | CharSourceRange::getTokenRange(FinalizeM->getSourceRange()), |
| 544 | SM, LangOpts, &Invalid); |
| 545 | TA.insertAfterToken(FinalizeM->getSourceRange().getEnd(), str); |
| 546 | |
| 547 | break; |
| 548 | } |
| 549 | } |
| 550 | } |
| 551 | } |
| 552 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 553 | //===----------------------------------------------------------------------===// |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 554 | // getAllTransformations. |
| 555 | //===----------------------------------------------------------------------===// |
| 556 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 557 | static void traverseAST(MigrationPass &pass) { |
| 558 | MigrationContext MigrateCtx(pass); |
| 559 | |
| 560 | if (pass.isGCMigration()) { |
| 561 | MigrateCtx.addTraverser(new GCCollectableCallsTraverser); |
Argyrios Kyrtzidis | f38fa73 | 2011-11-06 18:58:03 +0000 | [diff] [blame] | 562 | MigrateCtx.addTraverser(new GCAttrsTraverser()); |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 563 | } |
Argyrios Kyrtzidis | b0d5db1 | 2011-11-06 18:57:57 +0000 | [diff] [blame] | 564 | MigrateCtx.addTraverser(new PropertyRewriteTraverser()); |
Argyrios Kyrtzidis | 2a27818 | 2012-03-05 08:46:24 +0000 | [diff] [blame] | 565 | MigrateCtx.addTraverser(new BlockObjCVariableTraverser()); |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 566 | |
| 567 | MigrateCtx.traverse(pass.Ctx.getTranslationUnitDecl()); |
| 568 | } |
| 569 | |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 570 | static void independentTransforms(MigrationPass &pass) { |
| 571 | rewriteAutoreleasePool(pass); |
Argyrios Kyrtzidis | e7ef855 | 2011-11-04 15:58:22 +0000 | [diff] [blame] | 572 | removeRetainReleaseDeallocFinalize(pass); |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 573 | rewriteUnusedInitDelegate(pass); |
Argyrios Kyrtzidis | e7ef855 | 2011-11-04 15:58:22 +0000 | [diff] [blame] | 574 | removeZeroOutPropsInDeallocFinalize(pass); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 575 | makeAssignARCSafe(pass); |
Argyrios Kyrtzidis | 7196d06 | 2011-06-21 20:20:39 +0000 | [diff] [blame] | 576 | rewriteUnbridgedCasts(pass); |
Argyrios Kyrtzidis | fd10398 | 2011-07-18 07:44:45 +0000 | [diff] [blame] | 577 | checkAPIUses(pass); |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 578 | traverseAST(pass); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 579 | } |
| 580 | |
Argyrios Kyrtzidis | e0ac745 | 2011-11-04 15:58:08 +0000 | [diff] [blame] | 581 | std::vector<TransformFn> arcmt::getAllTransformations( |
Fariborz Jahanian | bbdfad5 | 2012-01-26 20:57:58 +0000 | [diff] [blame] | 582 | LangOptions::GCMode OrigGCMode, |
| 583 | bool NoFinalizeRemoval) { |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 584 | std::vector<TransformFn> transforms; |
| 585 | |
Fariborz Jahanian | bbdfad5 | 2012-01-26 20:57:58 +0000 | [diff] [blame] | 586 | if (OrigGCMode == LangOptions::GCOnly && NoFinalizeRemoval) |
| 587 | transforms.push_back(GCRewriteFinalize); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 588 | transforms.push_back(independentTransforms); |
Argyrios Kyrtzidis | fd3455a | 2011-06-21 20:20:42 +0000 | [diff] [blame] | 589 | // This depends on previous transformations removing various expressions. |
Argyrios Kyrtzidis | e7ef855 | 2011-11-04 15:58:22 +0000 | [diff] [blame] | 590 | transforms.push_back(removeEmptyStatementsAndDeallocFinalize); |
John McCall | 8f0e8d2 | 2011-06-15 23:25:17 +0000 | [diff] [blame] | 591 | |
| 592 | return transforms; |
| 593 | } |