Bug Summary

File:tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
Warning:line 1346, column 16
Called C++ object pointer is null

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name RewriteModernObjC.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn374814/build-llvm/tools/clang/lib/Frontend/Rewrite -I /build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite -I /build/llvm-toolchain-snapshot-10~svn374814/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn374814/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-10~svn374814/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn374814/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn374814/build-llvm/tools/clang/lib/Frontend/Rewrite -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn374814=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-10-15-035155-28452-1 -x c++ /build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
1//===-- RewriteModernObjC.cpp - Playground for the code rewriter ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Hacks and fun related to the code rewriter.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/Rewrite/Frontend/ASTConsumers.h"
14#include "clang/AST/AST.h"
15#include "clang/AST/ASTConsumer.h"
16#include "clang/AST/Attr.h"
17#include "clang/AST/ParentMap.h"
18#include "clang/Basic/CharInfo.h"
19#include "clang/Basic/Diagnostic.h"
20#include "clang/Basic/IdentifierTable.h"
21#include "clang/Basic/SourceManager.h"
22#include "clang/Basic/TargetInfo.h"
23#include "clang/Config/config.h"
24#include "clang/Lex/Lexer.h"
25#include "clang/Rewrite/Core/Rewriter.h"
26#include "llvm/ADT/DenseSet.h"
27#include "llvm/ADT/SmallPtrSet.h"
28#include "llvm/ADT/StringExtras.h"
29#include "llvm/Support/MemoryBuffer.h"
30#include "llvm/Support/raw_ostream.h"
31#include <memory>
32
33#if CLANG_ENABLE_OBJC_REWRITER1
34
35using namespace clang;
36using llvm::utostr;
37
38namespace {
39 class RewriteModernObjC : public ASTConsumer {
40 protected:
41
42 enum {
43 BLOCK_FIELD_IS_OBJECT = 3, /* id, NSObject, __attribute__((NSObject)),
44 block, ... */
45 BLOCK_FIELD_IS_BLOCK = 7, /* a block variable */
46 BLOCK_FIELD_IS_BYREF = 8, /* the on stack structure holding the
47 __block variable */
48 BLOCK_FIELD_IS_WEAK = 16, /* declared __weak, only used in byref copy
49 helpers */
50 BLOCK_BYREF_CALLER = 128, /* called from __block (byref) copy/dispose
51 support routines */
52 BLOCK_BYREF_CURRENT_MAX = 256
53 };
54
55 enum {
56 BLOCK_NEEDS_FREE = (1 << 24),
57 BLOCK_HAS_COPY_DISPOSE = (1 << 25),
58 BLOCK_HAS_CXX_OBJ = (1 << 26),
59 BLOCK_IS_GC = (1 << 27),
60 BLOCK_IS_GLOBAL = (1 << 28),
61 BLOCK_HAS_DESCRIPTOR = (1 << 29)
62 };
63
64 Rewriter Rewrite;
65 DiagnosticsEngine &Diags;
66 const LangOptions &LangOpts;
67 ASTContext *Context;
68 SourceManager *SM;
69 TranslationUnitDecl *TUDecl;
70 FileID MainFileID;
71 const char *MainFileStart, *MainFileEnd;
72 Stmt *CurrentBody;
73 ParentMap *PropParentMap; // created lazily.
74 std::string InFileName;
75 std::unique_ptr<raw_ostream> OutFile;
76 std::string Preamble;
77
78 TypeDecl *ProtocolTypeDecl;
79 VarDecl *GlobalVarDecl;
80 Expr *GlobalConstructionExp;
81 unsigned RewriteFailedDiag;
82 unsigned GlobalBlockRewriteFailedDiag;
83 // ObjC string constant support.
84 unsigned NumObjCStringLiterals;
85 VarDecl *ConstantStringClassReference;
86 RecordDecl *NSStringRecord;
87
88 // ObjC foreach break/continue generation support.
89 int BcLabelCount;
90
91 unsigned TryFinallyContainsReturnDiag;
92 // Needed for super.
93 ObjCMethodDecl *CurMethodDef;
94 RecordDecl *SuperStructDecl;
95 RecordDecl *ConstantStringDecl;
96
97 FunctionDecl *MsgSendFunctionDecl;
98 FunctionDecl *MsgSendSuperFunctionDecl;
99 FunctionDecl *MsgSendStretFunctionDecl;
100 FunctionDecl *MsgSendSuperStretFunctionDecl;
101 FunctionDecl *MsgSendFpretFunctionDecl;
102 FunctionDecl *GetClassFunctionDecl;
103 FunctionDecl *GetMetaClassFunctionDecl;
104 FunctionDecl *GetSuperClassFunctionDecl;
105 FunctionDecl *SelGetUidFunctionDecl;
106 FunctionDecl *CFStringFunctionDecl;
107 FunctionDecl *SuperConstructorFunctionDecl;
108 FunctionDecl *CurFunctionDef;
109
110 /* Misc. containers needed for meta-data rewrite. */
111 SmallVector<ObjCImplementationDecl *, 8> ClassImplementation;
112 SmallVector<ObjCCategoryImplDecl *, 8> CategoryImplementation;
113 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCSynthesizedStructs;
114 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> ObjCSynthesizedProtocols;
115 llvm::SmallPtrSet<ObjCInterfaceDecl*, 8> ObjCWrittenInterfaces;
116 llvm::SmallPtrSet<TagDecl*, 32> GlobalDefinedTags;
117 SmallVector<ObjCInterfaceDecl*, 32> ObjCInterfacesSeen;
118 /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
119 SmallVector<ObjCInterfaceDecl*, 8> DefinedNonLazyClasses;
120
121 /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
122 SmallVector<ObjCCategoryDecl *, 8> DefinedNonLazyCategories;
123
124 SmallVector<Stmt *, 32> Stmts;
125 SmallVector<int, 8> ObjCBcLabelNo;
126 // Remember all the @protocol(<expr>) expressions.
127 llvm::SmallPtrSet<ObjCProtocolDecl *, 32> ProtocolExprDecls;
128
129 llvm::DenseSet<uint64_t> CopyDestroyCache;
130
131 // Block expressions.
132 SmallVector<BlockExpr *, 32> Blocks;
133 SmallVector<int, 32> InnerDeclRefsCount;
134 SmallVector<DeclRefExpr *, 32> InnerDeclRefs;
135
136 SmallVector<DeclRefExpr *, 32> BlockDeclRefs;
137
138 // Block related declarations.
139 SmallVector<ValueDecl *, 8> BlockByCopyDecls;
140 llvm::SmallPtrSet<ValueDecl *, 8> BlockByCopyDeclsPtrSet;
141 SmallVector<ValueDecl *, 8> BlockByRefDecls;
142 llvm::SmallPtrSet<ValueDecl *, 8> BlockByRefDeclsPtrSet;
143 llvm::DenseMap<ValueDecl *, unsigned> BlockByRefDeclNo;
144 llvm::SmallPtrSet<ValueDecl *, 8> ImportedBlockDecls;
145 llvm::SmallPtrSet<VarDecl *, 8> ImportedLocalExternalDecls;
146
147 llvm::DenseMap<BlockExpr *, std::string> RewrittenBlockExprs;
148 llvm::DenseMap<ObjCInterfaceDecl *,
149 llvm::SmallSetVector<ObjCIvarDecl *, 8> > ReferencedIvars;
150
151 // ivar bitfield grouping containers
152 llvm::DenseSet<const ObjCInterfaceDecl *> ObjCInterefaceHasBitfieldGroups;
153 llvm::DenseMap<const ObjCIvarDecl* , unsigned> IvarGroupNumber;
154 // This container maps an <class, group number for ivar> tuple to the type
155 // of the struct where the bitfield belongs.
156 llvm::DenseMap<std::pair<const ObjCInterfaceDecl*, unsigned>, QualType> GroupRecordType;
157 SmallVector<FunctionDecl*, 32> FunctionDefinitionsSeen;
158
159 // This maps an original source AST to it's rewritten form. This allows
160 // us to avoid rewriting the same node twice (which is very uncommon).
161 // This is needed to support some of the exotic property rewriting.
162 llvm::DenseMap<Stmt *, Stmt *> ReplacedNodes;
163
164 // Needed for header files being rewritten
165 bool IsHeader;
166 bool SilenceRewriteMacroWarning;
167 bool GenerateLineInfo;
168 bool objc_impl_method;
169
170 bool DisableReplaceStmt;
171 class DisableReplaceStmtScope {
172 RewriteModernObjC &R;
173 bool SavedValue;
174
175 public:
176 DisableReplaceStmtScope(RewriteModernObjC &R)
177 : R(R), SavedValue(R.DisableReplaceStmt) {
178 R.DisableReplaceStmt = true;
179 }
180 ~DisableReplaceStmtScope() {
181 R.DisableReplaceStmt = SavedValue;
182 }
183 };
184 void InitializeCommon(ASTContext &context);
185
186 public:
187 llvm::DenseMap<ObjCMethodDecl*, std::string> MethodInternalNames;
188
189 // Top Level Driver code.
190 bool HandleTopLevelDecl(DeclGroupRef D) override {
191 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
192 if (ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(*I)) {
193 if (!Class->isThisDeclarationADefinition()) {
194 RewriteForwardClassDecl(D);
195 break;
196 } else {
197 // Keep track of all interface declarations seen.
198 ObjCInterfacesSeen.push_back(Class);
199 break;
200 }
201 }
202
203 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>(*I)) {
204 if (!Proto->isThisDeclarationADefinition()) {
205 RewriteForwardProtocolDecl(D);
206 break;
207 }
208 }
209
210 if (FunctionDecl *FDecl = dyn_cast<FunctionDecl>(*I)) {
211 // Under modern abi, we cannot translate body of the function
212 // yet until all class extensions and its implementation is seen.
213 // This is because they may introduce new bitfields which must go
214 // into their grouping struct.
215 if (FDecl->isThisDeclarationADefinition() &&
216 // Not c functions defined inside an objc container.
217 !FDecl->isTopLevelDeclInObjCContainer()) {
218 FunctionDefinitionsSeen.push_back(FDecl);
219 break;
220 }
221 }
222 HandleTopLevelSingleDecl(*I);
223 }
224 return true;
225 }
226
227 void HandleTopLevelDeclInObjCContainer(DeclGroupRef D) override {
228 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
229 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(*I)) {
230 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
231 RewriteBlockPointerDecl(TD);
232 else if (TD->getUnderlyingType()->isFunctionPointerType())
233 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
234 else
235 RewriteObjCQualifiedInterfaceTypes(TD);
236 }
237 }
238 }
239
240 void HandleTopLevelSingleDecl(Decl *D);
241 void HandleDeclInMainFile(Decl *D);
242 RewriteModernObjC(std::string inFile, std::unique_ptr<raw_ostream> OS,
243 DiagnosticsEngine &D, const LangOptions &LOpts,
244 bool silenceMacroWarn, bool LineInfo);
245
246 ~RewriteModernObjC() override {}
247
248 void HandleTranslationUnit(ASTContext &C) override;
249
250 void ReplaceStmt(Stmt *Old, Stmt *New) {
251 ReplaceStmtWithRange(Old, New, Old->getSourceRange());
252 }
253
254 void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
255 assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's")((Old != nullptr && New != nullptr && "Expected non-null Stmt's"
) ? static_cast<void> (0) : __assert_fail ("Old != nullptr && New != nullptr && \"Expected non-null Stmt's\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 255, __PRETTY_FUNCTION__))
;
256
257 Stmt *ReplacingStmt = ReplacedNodes[Old];
258 if (ReplacingStmt)
259 return; // We can't rewrite the same node twice.
260
261 if (DisableReplaceStmt)
262 return;
263
264 // Measure the old text.
265 int Size = Rewrite.getRangeSize(SrcRange);
266 if (Size == -1) {
267 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
268 << Old->getSourceRange();
269 return;
270 }
271 // Get the new text.
272 std::string SStr;
273 llvm::raw_string_ostream S(SStr);
274 New->printPretty(S, nullptr, PrintingPolicy(LangOpts));
275 const std::string &Str = S.str();
276
277 // If replacement succeeded or warning disabled return with no warning.
278 if (!Rewrite.ReplaceText(SrcRange.getBegin(), Size, Str)) {
279 ReplacedNodes[Old] = New;
280 return;
281 }
282 if (SilenceRewriteMacroWarning)
283 return;
284 Diags.Report(Context->getFullLoc(Old->getBeginLoc()), RewriteFailedDiag)
285 << Old->getSourceRange();
286 }
287
288 void InsertText(SourceLocation Loc, StringRef Str,
289 bool InsertAfter = true) {
290 // If insertion succeeded or warning disabled return with no warning.
291 if (!Rewrite.InsertText(Loc, Str, InsertAfter) ||
292 SilenceRewriteMacroWarning)
293 return;
294
295 Diags.Report(Context->getFullLoc(Loc), RewriteFailedDiag);
296 }
297
298 void ReplaceText(SourceLocation Start, unsigned OrigLength,
299 StringRef Str) {
300 // If removal succeeded or warning disabled return with no warning.
301 if (!Rewrite.ReplaceText(Start, OrigLength, Str) ||
302 SilenceRewriteMacroWarning)
303 return;
304
305 Diags.Report(Context->getFullLoc(Start), RewriteFailedDiag);
306 }
307
308 // Syntactic Rewriting.
309 void RewriteRecordBody(RecordDecl *RD);
310 void RewriteInclude();
311 void RewriteLineDirective(const Decl *D);
312 void ConvertSourceLocationToLineDirective(SourceLocation Loc,
313 std::string &LineString);
314 void RewriteForwardClassDecl(DeclGroupRef D);
315 void RewriteForwardClassDecl(const SmallVectorImpl<Decl *> &DG);
316 void RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
317 const std::string &typedefString);
318 void RewriteImplementations();
319 void RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
320 ObjCImplementationDecl *IMD,
321 ObjCCategoryImplDecl *CID);
322 void RewriteInterfaceDecl(ObjCInterfaceDecl *Dcl);
323 void RewriteImplementationDecl(Decl *Dcl);
324 void RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
325 ObjCMethodDecl *MDecl, std::string &ResultStr);
326 void RewriteTypeIntoString(QualType T, std::string &ResultStr,
327 const FunctionType *&FPRetType);
328 void RewriteByRefString(std::string &ResultStr, const std::string &Name,
329 ValueDecl *VD, bool def=false);
330 void RewriteCategoryDecl(ObjCCategoryDecl *Dcl);
331 void RewriteProtocolDecl(ObjCProtocolDecl *Dcl);
332 void RewriteForwardProtocolDecl(DeclGroupRef D);
333 void RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG);
334 void RewriteMethodDeclaration(ObjCMethodDecl *Method);
335 void RewriteProperty(ObjCPropertyDecl *prop);
336 void RewriteFunctionDecl(FunctionDecl *FD);
337 void RewriteBlockPointerType(std::string& Str, QualType Type);
338 void RewriteBlockPointerTypeVariable(std::string& Str, ValueDecl *VD);
339 void RewriteBlockLiteralFunctionDecl(FunctionDecl *FD);
340 void RewriteObjCQualifiedInterfaceTypes(Decl *Dcl);
341 void RewriteTypeOfDecl(VarDecl *VD);
342 void RewriteObjCQualifiedInterfaceTypes(Expr *E);
343
344 std::string getIvarAccessString(ObjCIvarDecl *D);
345
346 // Expression Rewriting.
347 Stmt *RewriteFunctionBodyOrGlobalInitializer(Stmt *S);
348 Stmt *RewriteAtEncode(ObjCEncodeExpr *Exp);
349 Stmt *RewritePropertyOrImplicitGetter(PseudoObjectExpr *Pseudo);
350 Stmt *RewritePropertyOrImplicitSetter(PseudoObjectExpr *Pseudo);
351 Stmt *RewriteAtSelector(ObjCSelectorExpr *Exp);
352 Stmt *RewriteMessageExpr(ObjCMessageExpr *Exp);
353 Stmt *RewriteObjCStringLiteral(ObjCStringLiteral *Exp);
354 Stmt *RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp);
355 Stmt *RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp);
356 Stmt *RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp);
357 Stmt *RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp);
358 Stmt *RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp);
359 Stmt *RewriteObjCTryStmt(ObjCAtTryStmt *S);
360 Stmt *RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S);
361 Stmt *RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S);
362 Stmt *RewriteObjCThrowStmt(ObjCAtThrowStmt *S);
363 Stmt *RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
364 SourceLocation OrigEnd);
365 Stmt *RewriteBreakStmt(BreakStmt *S);
366 Stmt *RewriteContinueStmt(ContinueStmt *S);
367 void RewriteCastExpr(CStyleCastExpr *CE);
368 void RewriteImplicitCastObjCExpr(CastExpr *IE);
369
370 // Computes ivar bitfield group no.
371 unsigned ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV);
372 // Names field decl. for ivar bitfield group.
373 void ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV, std::string &Result);
374 // Names struct type for ivar bitfield group.
375 void ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV, std::string &Result);
376 // Names symbol for ivar bitfield group field offset.
377 void ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV, std::string &Result);
378 // Given an ivar bitfield, it builds (or finds) its group record type.
379 QualType GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV);
380 QualType SynthesizeBitfieldGroupStructType(
381 ObjCIvarDecl *IV,
382 SmallVectorImpl<ObjCIvarDecl *> &IVars);
383
384 // Block rewriting.
385 void RewriteBlocksInFunctionProtoType(QualType funcType, NamedDecl *D);
386
387 // Block specific rewrite rules.
388 void RewriteBlockPointerDecl(NamedDecl *VD);
389 void RewriteByRefVar(VarDecl *VD, bool firstDecl, bool lastDecl);
390 Stmt *RewriteBlockDeclRefExpr(DeclRefExpr *VD);
391 Stmt *RewriteLocalVariableExternalStorage(DeclRefExpr *DRE);
392 void RewriteBlockPointerFunctionArgs(FunctionDecl *FD);
393
394 void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
395 std::string &Result);
396
397 void RewriteObjCFieldDecl(FieldDecl *fieldDecl, std::string &Result);
398 bool IsTagDefinedInsideClass(ObjCContainerDecl *IDecl, TagDecl *Tag,
399 bool &IsNamedDefinition);
400 void RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
401 std::string &Result);
402
403 bool RewriteObjCFieldDeclType(QualType &Type, std::string &Result);
404
405 void RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
406 std::string &Result);
407
408 void Initialize(ASTContext &context) override;
409
410 // Misc. AST transformation routines. Sometimes they end up calling
411 // rewriting routines on the new ASTs.
412 CallExpr *SynthesizeCallToFunctionDecl(FunctionDecl *FD,
413 ArrayRef<Expr *> Args,
414 SourceLocation StartLoc=SourceLocation(),
415 SourceLocation EndLoc=SourceLocation());
416
417 Expr *SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
418 QualType returnType,
419 SmallVectorImpl<QualType> &ArgTypes,
420 SmallVectorImpl<Expr*> &MsgExprs,
421 ObjCMethodDecl *Method);
422
423 Stmt *SynthMessageExpr(ObjCMessageExpr *Exp,
424 SourceLocation StartLoc=SourceLocation(),
425 SourceLocation EndLoc=SourceLocation());
426
427 void SynthCountByEnumWithState(std::string &buf);
428 void SynthMsgSendFunctionDecl();
429 void SynthMsgSendSuperFunctionDecl();
430 void SynthMsgSendStretFunctionDecl();
431 void SynthMsgSendFpretFunctionDecl();
432 void SynthMsgSendSuperStretFunctionDecl();
433 void SynthGetClassFunctionDecl();
434 void SynthGetMetaClassFunctionDecl();
435 void SynthGetSuperClassFunctionDecl();
436 void SynthSelGetUidFunctionDecl();
437 void SynthSuperConstructorFunctionDecl();
438
439 // Rewriting metadata
440 template<typename MethodIterator>
441 void RewriteObjCMethodsMetaData(MethodIterator MethodBegin,
442 MethodIterator MethodEnd,
443 bool IsInstanceMethod,
444 StringRef prefix,
445 StringRef ClassName,
446 std::string &Result);
447 void RewriteObjCProtocolMetaData(ObjCProtocolDecl *Protocol,
448 std::string &Result);
449 void RewriteObjCClassMetaData(ObjCImplementationDecl *IDecl,
450 std::string &Result);
451 void RewriteClassSetupInitHook(std::string &Result);
452
453 void RewriteMetaDataIntoBuffer(std::string &Result);
454 void WriteImageInfo(std::string &Result);
455 void RewriteObjCCategoryImplDecl(ObjCCategoryImplDecl *CDecl,
456 std::string &Result);
457 void RewriteCategorySetupInitHook(std::string &Result);
458
459 // Rewriting ivar
460 void RewriteIvarOffsetComputation(ObjCIvarDecl *ivar,
461 std::string &Result);
462 Stmt *RewriteObjCIvarRefExpr(ObjCIvarRefExpr *IV);
463
464
465 std::string SynthesizeByrefCopyDestroyHelper(VarDecl *VD, int flag);
466 std::string SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
467 StringRef funcName, std::string Tag);
468 std::string SynthesizeBlockFunc(BlockExpr *CE, int i,
469 StringRef funcName, std::string Tag);
470 std::string SynthesizeBlockImpl(BlockExpr *CE,
471 std::string Tag, std::string Desc);
472 std::string SynthesizeBlockDescriptor(std::string DescTag,
473 std::string ImplTag,
474 int i, StringRef funcName,
475 unsigned hasCopy);
476 Stmt *SynthesizeBlockCall(CallExpr *Exp, const Expr* BlockExp);
477 void SynthesizeBlockLiterals(SourceLocation FunLocStart,
478 StringRef FunName);
479 FunctionDecl *SynthBlockInitFunctionDecl(StringRef name);
480 Stmt *SynthBlockInitExpr(BlockExpr *Exp,
481 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs);
482
483 // Misc. helper routines.
484 QualType getProtocolType();
485 void WarnAboutReturnGotoStmts(Stmt *S);
486 void CheckFunctionPointerDecl(QualType dType, NamedDecl *ND);
487 void InsertBlockLiteralsWithinFunction(FunctionDecl *FD);
488 void InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD);
489
490 bool IsDeclStmtInForeachHeader(DeclStmt *DS);
491 void CollectBlockDeclRefInfo(BlockExpr *Exp);
492 void GetBlockDeclRefExprs(Stmt *S);
493 void GetInnerBlockDeclRefExprs(Stmt *S,
494 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
495 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
496
497 // We avoid calling Type::isBlockPointerType(), since it operates on the
498 // canonical type. We only care if the top-level type is a closure pointer.
499 bool isTopLevelBlockPointerType(QualType T) {
500 return isa<BlockPointerType>(T);
501 }
502
503 /// convertBlockPointerToFunctionPointer - Converts a block-pointer type
504 /// to a function pointer type and upon success, returns true; false
505 /// otherwise.
506 bool convertBlockPointerToFunctionPointer(QualType &T) {
507 if (isTopLevelBlockPointerType(T)) {
508 const BlockPointerType *BPT = T->getAs<BlockPointerType>();
509 T = Context->getPointerType(BPT->getPointeeType());
510 return true;
511 }
512 return false;
513 }
514
515 bool convertObjCTypeToCStyleType(QualType &T);
516
517 bool needToScanForQualifiers(QualType T);
518 QualType getSuperStructType();
519 QualType getConstantStringStructType();
520 QualType convertFunctionTypeOfBlocks(const FunctionType *FT);
521
522 void convertToUnqualifiedObjCType(QualType &T) {
523 if (T->isObjCQualifiedIdType()) {
524 bool isConst = T.isConstQualified();
525 T = isConst ? Context->getObjCIdType().withConst()
526 : Context->getObjCIdType();
527 }
528 else if (T->isObjCQualifiedClassType())
529 T = Context->getObjCClassType();
530 else if (T->isObjCObjectPointerType() &&
531 T->getPointeeType()->isObjCQualifiedInterfaceType()) {
532 if (const ObjCObjectPointerType * OBJPT =
533 T->getAsObjCInterfacePointerType()) {
534 const ObjCInterfaceType *IFaceT = OBJPT->getInterfaceType();
535 T = QualType(IFaceT, 0);
536 T = Context->getPointerType(T);
537 }
538 }
539 }
540
541 // FIXME: This predicate seems like it would be useful to add to ASTContext.
542 bool isObjCType(QualType T) {
543 if (!LangOpts.ObjC)
544 return false;
545
546 QualType OCT = Context->getCanonicalType(T).getUnqualifiedType();
547
548 if (OCT == Context->getCanonicalType(Context->getObjCIdType()) ||
549 OCT == Context->getCanonicalType(Context->getObjCClassType()))
550 return true;
551
552 if (const PointerType *PT = OCT->getAs<PointerType>()) {
553 if (isa<ObjCInterfaceType>(PT->getPointeeType()) ||
554 PT->getPointeeType()->isObjCQualifiedIdType())
555 return true;
556 }
557 return false;
558 }
559
560 bool PointerTypeTakesAnyBlockArguments(QualType QT);
561 bool PointerTypeTakesAnyObjCQualifiedType(QualType QT);
562 void GetExtentOfArgList(const char *Name, const char *&LParen,
563 const char *&RParen);
564
565 void QuoteDoublequotes(std::string &From, std::string &To) {
566 for (unsigned i = 0; i < From.length(); i++) {
567 if (From[i] == '"')
568 To += "\\\"";
569 else
570 To += From[i];
571 }
572 }
573
574 QualType getSimpleFunctionType(QualType result,
575 ArrayRef<QualType> args,
576 bool variadic = false) {
577 if (result == Context->getObjCInstanceType())
578 result = Context->getObjCIdType();
579 FunctionProtoType::ExtProtoInfo fpi;
580 fpi.Variadic = variadic;
581 return Context->getFunctionType(result, args, fpi);
582 }
583
584 // Helper function: create a CStyleCastExpr with trivial type source info.
585 CStyleCastExpr* NoTypeInfoCStyleCastExpr(ASTContext *Ctx, QualType Ty,
586 CastKind Kind, Expr *E) {
587 TypeSourceInfo *TInfo = Ctx->getTrivialTypeSourceInfo(Ty, SourceLocation());
588 return CStyleCastExpr::Create(*Ctx, Ty, VK_RValue, Kind, E, nullptr,
589 TInfo, SourceLocation(), SourceLocation());
590 }
591
592 bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
593 IdentifierInfo* II = &Context->Idents.get("load");
594 Selector LoadSel = Context->Selectors.getSelector(0, &II);
595 return OD->getClassMethod(LoadSel) != nullptr;
596 }
597
598 StringLiteral *getStringLiteral(StringRef Str) {
599 QualType StrType = Context->getConstantArrayType(
600 Context->CharTy, llvm::APInt(32, Str.size() + 1), nullptr,
601 ArrayType::Normal, 0);
602 return StringLiteral::Create(*Context, Str, StringLiteral::Ascii,
603 /*Pascal=*/false, StrType, SourceLocation());
604 }
605 };
606} // end anonymous namespace
607
608void RewriteModernObjC::RewriteBlocksInFunctionProtoType(QualType funcType,
609 NamedDecl *D) {
610 if (const FunctionProtoType *fproto
611 = dyn_cast<FunctionProtoType>(funcType.IgnoreParens())) {
612 for (const auto &I : fproto->param_types())
613 if (isTopLevelBlockPointerType(I)) {
614 // All the args are checked/rewritten. Don't call twice!
615 RewriteBlockPointerDecl(D);
616 break;
617 }
618 }
619}
620
621void RewriteModernObjC::CheckFunctionPointerDecl(QualType funcType, NamedDecl *ND) {
622 const PointerType *PT = funcType->getAs<PointerType>();
623 if (PT && PointerTypeTakesAnyBlockArguments(funcType))
624 RewriteBlocksInFunctionProtoType(PT->getPointeeType(), ND);
625}
626
627static bool IsHeaderFile(const std::string &Filename) {
628 std::string::size_type DotPos = Filename.rfind('.');
629
630 if (DotPos == std::string::npos) {
631 // no file extension
632 return false;
633 }
634
635 std::string Ext = std::string(Filename.begin()+DotPos+1, Filename.end());
636 // C header: .h
637 // C++ header: .hh or .H;
638 return Ext == "h" || Ext == "hh" || Ext == "H";
639}
640
641RewriteModernObjC::RewriteModernObjC(std::string inFile,
642 std::unique_ptr<raw_ostream> OS,
643 DiagnosticsEngine &D,
644 const LangOptions &LOpts,
645 bool silenceMacroWarn, bool LineInfo)
646 : Diags(D), LangOpts(LOpts), InFileName(inFile), OutFile(std::move(OS)),
647 SilenceRewriteMacroWarning(silenceMacroWarn), GenerateLineInfo(LineInfo) {
648 IsHeader = IsHeaderFile(inFile);
649 RewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
650 "rewriting sub-expression within a macro (may not be correct)");
651 // FIXME. This should be an error. But if block is not called, it is OK. And it
652 // may break including some headers.
653 GlobalBlockRewriteFailedDiag = Diags.getCustomDiagID(DiagnosticsEngine::Warning,
654 "rewriting block literal declared in global scope is not implemented");
655
656 TryFinallyContainsReturnDiag = Diags.getCustomDiagID(
657 DiagnosticsEngine::Warning,
658 "rewriter doesn't support user-specified control flow semantics "
659 "for @try/@finally (code may not execute properly)");
660}
661
662std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
663 const std::string &InFile, std::unique_ptr<raw_ostream> OS,
664 DiagnosticsEngine &Diags, const LangOptions &LOpts,
665 bool SilenceRewriteMacroWarning, bool LineInfo) {
666 return std::make_unique<RewriteModernObjC>(InFile, std::move(OS), Diags,
667 LOpts, SilenceRewriteMacroWarning,
668 LineInfo);
669}
670
671void RewriteModernObjC::InitializeCommon(ASTContext &context) {
672 Context = &context;
673 SM = &Context->getSourceManager();
674 TUDecl = Context->getTranslationUnitDecl();
675 MsgSendFunctionDecl = nullptr;
676 MsgSendSuperFunctionDecl = nullptr;
677 MsgSendStretFunctionDecl = nullptr;
678 MsgSendSuperStretFunctionDecl = nullptr;
679 MsgSendFpretFunctionDecl = nullptr;
680 GetClassFunctionDecl = nullptr;
681 GetMetaClassFunctionDecl = nullptr;
682 GetSuperClassFunctionDecl = nullptr;
683 SelGetUidFunctionDecl = nullptr;
684 CFStringFunctionDecl = nullptr;
685 ConstantStringClassReference = nullptr;
686 NSStringRecord = nullptr;
687 CurMethodDef = nullptr;
688 CurFunctionDef = nullptr;
689 GlobalVarDecl = nullptr;
690 GlobalConstructionExp = nullptr;
691 SuperStructDecl = nullptr;
692 ProtocolTypeDecl = nullptr;
693 ConstantStringDecl = nullptr;
694 BcLabelCount = 0;
695 SuperConstructorFunctionDecl = nullptr;
696 NumObjCStringLiterals = 0;
697 PropParentMap = nullptr;
698 CurrentBody = nullptr;
699 DisableReplaceStmt = false;
700 objc_impl_method = false;
701
702 // Get the ID and start/end of the main file.
703 MainFileID = SM->getMainFileID();
704 const llvm::MemoryBuffer *MainBuf = SM->getBuffer(MainFileID);
705 MainFileStart = MainBuf->getBufferStart();
706 MainFileEnd = MainBuf->getBufferEnd();
707
708 Rewrite.setSourceMgr(Context->getSourceManager(), Context->getLangOpts());
709}
710
711//===----------------------------------------------------------------------===//
712// Top Level Driver Code
713//===----------------------------------------------------------------------===//
714
715void RewriteModernObjC::HandleTopLevelSingleDecl(Decl *D) {
716 if (Diags.hasErrorOccurred())
717 return;
718
719 // Two cases: either the decl could be in the main file, or it could be in a
720 // #included file. If the former, rewrite it now. If the later, check to see
721 // if we rewrote the #include/#import.
722 SourceLocation Loc = D->getLocation();
723 Loc = SM->getExpansionLoc(Loc);
724
725 // If this is for a builtin, ignore it.
726 if (Loc.isInvalid()) return;
727
728 // Look for built-in declarations that we need to refer during the rewrite.
729 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
730 RewriteFunctionDecl(FD);
731 } else if (VarDecl *FVD = dyn_cast<VarDecl>(D)) {
732 // declared in <Foundation/NSString.h>
733 if (FVD->getName() == "_NSConstantStringClassReference") {
734 ConstantStringClassReference = FVD;
735 return;
736 }
737 } else if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(D)) {
738 RewriteCategoryDecl(CD);
739 } else if (ObjCProtocolDecl *PD = dyn_cast<ObjCProtocolDecl>(D)) {
740 if (PD->isThisDeclarationADefinition())
741 RewriteProtocolDecl(PD);
742 } else if (LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(D)) {
743 // Recurse into linkage specifications
744 for (DeclContext::decl_iterator DI = LSD->decls_begin(),
745 DIEnd = LSD->decls_end();
746 DI != DIEnd; ) {
747 if (ObjCInterfaceDecl *IFace = dyn_cast<ObjCInterfaceDecl>((*DI))) {
748 if (!IFace->isThisDeclarationADefinition()) {
749 SmallVector<Decl *, 8> DG;
750 SourceLocation StartLoc = IFace->getBeginLoc();
751 do {
752 if (isa<ObjCInterfaceDecl>(*DI) &&
753 !cast<ObjCInterfaceDecl>(*DI)->isThisDeclarationADefinition() &&
754 StartLoc == (*DI)->getBeginLoc())
755 DG.push_back(*DI);
756 else
757 break;
758
759 ++DI;
760 } while (DI != DIEnd);
761 RewriteForwardClassDecl(DG);
762 continue;
763 }
764 else {
765 // Keep track of all interface declarations seen.
766 ObjCInterfacesSeen.push_back(IFace);
767 ++DI;
768 continue;
769 }
770 }
771
772 if (ObjCProtocolDecl *Proto = dyn_cast<ObjCProtocolDecl>((*DI))) {
773 if (!Proto->isThisDeclarationADefinition()) {
774 SmallVector<Decl *, 8> DG;
775 SourceLocation StartLoc = Proto->getBeginLoc();
776 do {
777 if (isa<ObjCProtocolDecl>(*DI) &&
778 !cast<ObjCProtocolDecl>(*DI)->isThisDeclarationADefinition() &&
779 StartLoc == (*DI)->getBeginLoc())
780 DG.push_back(*DI);
781 else
782 break;
783
784 ++DI;
785 } while (DI != DIEnd);
786 RewriteForwardProtocolDecl(DG);
787 continue;
788 }
789 }
790
791 HandleTopLevelSingleDecl(*DI);
792 ++DI;
793 }
794 }
795 // If we have a decl in the main file, see if we should rewrite it.
796 if (SM->isWrittenInMainFile(Loc))
797 return HandleDeclInMainFile(D);
798}
799
800//===----------------------------------------------------------------------===//
801// Syntactic (non-AST) Rewriting Code
802//===----------------------------------------------------------------------===//
803
804void RewriteModernObjC::RewriteInclude() {
805 SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
806 StringRef MainBuf = SM->getBufferData(MainFileID);
807 const char *MainBufStart = MainBuf.begin();
808 const char *MainBufEnd = MainBuf.end();
809 size_t ImportLen = strlen("import");
810
811 // Loop over the whole file, looking for includes.
812 for (const char *BufPtr = MainBufStart; BufPtr < MainBufEnd; ++BufPtr) {
813 if (*BufPtr == '#') {
814 if (++BufPtr == MainBufEnd)
815 return;
816 while (*BufPtr == ' ' || *BufPtr == '\t')
817 if (++BufPtr == MainBufEnd)
818 return;
819 if (!strncmp(BufPtr, "import", ImportLen)) {
820 // replace import with include
821 SourceLocation ImportLoc =
822 LocStart.getLocWithOffset(BufPtr-MainBufStart);
823 ReplaceText(ImportLoc, ImportLen, "include");
824 BufPtr += ImportLen;
825 }
826 }
827 }
828}
829
830static void WriteInternalIvarName(const ObjCInterfaceDecl *IDecl,
831 ObjCIvarDecl *IvarDecl, std::string &Result) {
832 Result += "OBJC_IVAR_$_";
833 Result += IDecl->getName();
834 Result += "$";
835 Result += IvarDecl->getName();
836}
837
838std::string
839RewriteModernObjC::getIvarAccessString(ObjCIvarDecl *D) {
840 const ObjCInterfaceDecl *ClassDecl = D->getContainingInterface();
841
842 // Build name of symbol holding ivar offset.
843 std::string IvarOffsetName;
844 if (D->isBitField())
845 ObjCIvarBitfieldGroupOffset(D, IvarOffsetName);
846 else
847 WriteInternalIvarName(ClassDecl, D, IvarOffsetName);
848
849 std::string S = "(*(";
850 QualType IvarT = D->getType();
851 if (D->isBitField())
852 IvarT = GetGroupRecordTypeForObjCIvarBitfield(D);
853
854 if (!isa<TypedefType>(IvarT) && IvarT->isRecordType()) {
855 RecordDecl *RD = IvarT->castAs<RecordType>()->getDecl();
856 RD = RD->getDefinition();
857 if (RD && !RD->getDeclName().getAsIdentifierInfo()) {
858 // decltype(((Foo_IMPL*)0)->bar) *
859 ObjCContainerDecl *CDecl =
860 dyn_cast<ObjCContainerDecl>(D->getDeclContext());
861 // ivar in class extensions requires special treatment.
862 if (ObjCCategoryDecl *CatDecl = dyn_cast<ObjCCategoryDecl>(CDecl))
863 CDecl = CatDecl->getClassInterface();
864 std::string RecName = CDecl->getName();
865 RecName += "_IMPL";
866 RecordDecl *RD =
867 RecordDecl::Create(*Context, TTK_Struct, TUDecl, SourceLocation(),
868 SourceLocation(), &Context->Idents.get(RecName));
869 QualType PtrStructIMPL = Context->getPointerType(Context->getTagDeclType(RD));
870 unsigned UnsignedIntSize =
871 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
872 Expr *Zero = IntegerLiteral::Create(*Context,
873 llvm::APInt(UnsignedIntSize, 0),
874 Context->UnsignedIntTy, SourceLocation());
875 Zero = NoTypeInfoCStyleCastExpr(Context, PtrStructIMPL, CK_BitCast, Zero);
876 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
877 Zero);
878 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
879 SourceLocation(),
880 &Context->Idents.get(D->getNameAsString()),
881 IvarT, nullptr,
882 /*BitWidth=*/nullptr, /*Mutable=*/true,
883 ICIS_NoInit);
884 MemberExpr *ME = MemberExpr::CreateImplicit(
885 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
886 IvarT = Context->getDecltypeType(ME, ME->getType());
887 }
888 }
889 convertObjCTypeToCStyleType(IvarT);
890 QualType castT = Context->getPointerType(IvarT);
891 std::string TypeString(castT.getAsString(Context->getPrintingPolicy()));
892 S += TypeString;
893 S += ")";
894
895 // ((char *)self + IVAR_OFFSET_SYMBOL_NAME)
896 S += "((char *)self + ";
897 S += IvarOffsetName;
898 S += "))";
899 if (D->isBitField()) {
900 S += ".";
901 S += D->getNameAsString();
902 }
903 ReferencedIvars[const_cast<ObjCInterfaceDecl *>(ClassDecl)].insert(D);
904 return S;
905}
906
907/// mustSynthesizeSetterGetterMethod - returns true if setter or getter has not
908/// been found in the class implementation. In this case, it must be synthesized.
909static bool mustSynthesizeSetterGetterMethod(ObjCImplementationDecl *IMP,
910 ObjCPropertyDecl *PD,
911 bool getter) {
912 return getter ? !IMP->getInstanceMethod(PD->getGetterName())
913 : !IMP->getInstanceMethod(PD->getSetterName());
914
915}
916
917void RewriteModernObjC::RewritePropertyImplDecl(ObjCPropertyImplDecl *PID,
918 ObjCImplementationDecl *IMD,
919 ObjCCategoryImplDecl *CID) {
920 static bool objcGetPropertyDefined = false;
921 static bool objcSetPropertyDefined = false;
922 SourceLocation startGetterSetterLoc;
923
924 if (PID->getBeginLoc().isValid()) {
925 SourceLocation startLoc = PID->getBeginLoc();
926 InsertText(startLoc, "// ");
927 const char *startBuf = SM->getCharacterData(startLoc);
928 assert((*startBuf == '@') && "bogus @synthesize location")(((*startBuf == '@') && "bogus @synthesize location")
? static_cast<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @synthesize location\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 928, __PRETTY_FUNCTION__))
;
929 const char *semiBuf = strchr(startBuf, ';');
930 assert((*semiBuf == ';') && "@synthesize: can't find ';'")(((*semiBuf == ';') && "@synthesize: can't find ';'")
? static_cast<void> (0) : __assert_fail ("(*semiBuf == ';') && \"@synthesize: can't find ';'\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 930, __PRETTY_FUNCTION__))
;
931 startGetterSetterLoc = startLoc.getLocWithOffset(semiBuf-startBuf+1);
932 } else
933 startGetterSetterLoc = IMD ? IMD->getEndLoc() : CID->getEndLoc();
934
935 if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Dynamic)
936 return; // FIXME: is this correct?
937
938 // Generate the 'getter' function.
939 ObjCPropertyDecl *PD = PID->getPropertyDecl();
940 ObjCIvarDecl *OID = PID->getPropertyIvarDecl();
941 assert(IMD && OID && "Synthesized ivars must be attached to @implementation")((IMD && OID && "Synthesized ivars must be attached to @implementation"
) ? static_cast<void> (0) : __assert_fail ("IMD && OID && \"Synthesized ivars must be attached to @implementation\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 941, __PRETTY_FUNCTION__))
;
942
943 unsigned Attributes = PD->getPropertyAttributes();
944 if (mustSynthesizeSetterGetterMethod(IMD, PD, true /*getter*/)) {
945 bool GenGetProperty = !(Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic) &&
946 (Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
947 ObjCPropertyDecl::OBJC_PR_copy));
948 std::string Getr;
949 if (GenGetProperty && !objcGetPropertyDefined) {
950 objcGetPropertyDefined = true;
951 // FIXME. Is this attribute correct in all cases?
952 Getr = "\nextern \"C\" __declspec(dllimport) "
953 "id objc_getProperty(id, SEL, long, bool);\n";
954 }
955 RewriteObjCMethodDecl(OID->getContainingInterface(),
956 PD->getGetterMethodDecl(), Getr);
957 Getr += "{ ";
958 // Synthesize an explicit cast to gain access to the ivar.
959 // See objc-act.c:objc_synthesize_new_getter() for details.
960 if (GenGetProperty) {
961 // return objc_getProperty(self, _cmd, offsetof(ClassDecl, OID), 1)
962 Getr += "typedef ";
963 const FunctionType *FPRetType = nullptr;
964 RewriteTypeIntoString(PD->getGetterMethodDecl()->getReturnType(), Getr,
965 FPRetType);
966 Getr += " _TYPE";
967 if (FPRetType) {
968 Getr += ")"; // close the precedence "scope" for "*".
969
970 // Now, emit the argument types (if any).
971 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)){
972 Getr += "(";
973 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
974 if (i) Getr += ", ";
975 std::string ParamStr =
976 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
977 Getr += ParamStr;
978 }
979 if (FT->isVariadic()) {
980 if (FT->getNumParams())
981 Getr += ", ";
982 Getr += "...";
983 }
984 Getr += ")";
985 } else
986 Getr += "()";
987 }
988 Getr += ";\n";
989 Getr += "return (_TYPE)";
990 Getr += "objc_getProperty(self, _cmd, ";
991 RewriteIvarOffsetComputation(OID, Getr);
992 Getr += ", 1)";
993 }
994 else
995 Getr += "return " + getIvarAccessString(OID);
996 Getr += "; }";
997 InsertText(startGetterSetterLoc, Getr);
998 }
999
1000 if (PD->isReadOnly() ||
1001 !mustSynthesizeSetterGetterMethod(IMD, PD, false /*setter*/))
1002 return;
1003
1004 // Generate the 'setter' function.
1005 std::string Setr;
1006 bool GenSetProperty = Attributes & (ObjCPropertyDecl::OBJC_PR_retain |
1007 ObjCPropertyDecl::OBJC_PR_copy);
1008 if (GenSetProperty && !objcSetPropertyDefined) {
1009 objcSetPropertyDefined = true;
1010 // FIXME. Is this attribute correct in all cases?
1011 Setr = "\nextern \"C\" __declspec(dllimport) "
1012 "void objc_setProperty (id, SEL, long, id, bool, bool);\n";
1013 }
1014
1015 RewriteObjCMethodDecl(OID->getContainingInterface(),
1016 PD->getSetterMethodDecl(), Setr);
1017 Setr += "{ ";
1018 // Synthesize an explicit cast to initialize the ivar.
1019 // See objc-act.c:objc_synthesize_new_setter() for details.
1020 if (GenSetProperty) {
1021 Setr += "objc_setProperty (self, _cmd, ";
1022 RewriteIvarOffsetComputation(OID, Setr);
1023 Setr += ", (id)";
1024 Setr += PD->getName();
1025 Setr += ", ";
1026 if (Attributes & ObjCPropertyDecl::OBJC_PR_nonatomic)
1027 Setr += "0, ";
1028 else
1029 Setr += "1, ";
1030 if (Attributes & ObjCPropertyDecl::OBJC_PR_copy)
1031 Setr += "1)";
1032 else
1033 Setr += "0)";
1034 }
1035 else {
1036 Setr += getIvarAccessString(OID) + " = ";
1037 Setr += PD->getName();
1038 }
1039 Setr += "; }\n";
1040 InsertText(startGetterSetterLoc, Setr);
1041}
1042
1043static void RewriteOneForwardClassDecl(ObjCInterfaceDecl *ForwardDecl,
1044 std::string &typedefString) {
1045 typedefString += "\n#ifndef _REWRITER_typedef_";
1046 typedefString += ForwardDecl->getNameAsString();
1047 typedefString += "\n";
1048 typedefString += "#define _REWRITER_typedef_";
1049 typedefString += ForwardDecl->getNameAsString();
1050 typedefString += "\n";
1051 typedefString += "typedef struct objc_object ";
1052 typedefString += ForwardDecl->getNameAsString();
1053 // typedef struct { } _objc_exc_Classname;
1054 typedefString += ";\ntypedef struct {} _objc_exc_";
1055 typedefString += ForwardDecl->getNameAsString();
1056 typedefString += ";\n#endif\n";
1057}
1058
1059void RewriteModernObjC::RewriteForwardClassEpilogue(ObjCInterfaceDecl *ClassDecl,
1060 const std::string &typedefString) {
1061 SourceLocation startLoc = ClassDecl->getBeginLoc();
1062 const char *startBuf = SM->getCharacterData(startLoc);
1063 const char *semiPtr = strchr(startBuf, ';');
1064 // Replace the @class with typedefs corresponding to the classes.
1065 ReplaceText(startLoc, semiPtr-startBuf+1, typedefString);
1066}
1067
1068void RewriteModernObjC::RewriteForwardClassDecl(DeclGroupRef D) {
1069 std::string typedefString;
1070 for (DeclGroupRef::iterator I = D.begin(), E = D.end(); I != E; ++I) {
1071 if (ObjCInterfaceDecl *ForwardDecl = dyn_cast<ObjCInterfaceDecl>(*I)) {
1072 if (I == D.begin()) {
1073 // Translate to typedef's that forward reference structs with the same name
1074 // as the class. As a convenience, we include the original declaration
1075 // as a comment.
1076 typedefString += "// @class ";
1077 typedefString += ForwardDecl->getNameAsString();
1078 typedefString += ";";
1079 }
1080 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1081 }
1082 else
1083 HandleTopLevelSingleDecl(*I);
1084 }
1085 DeclGroupRef::iterator I = D.begin();
1086 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(*I), typedefString);
1087}
1088
1089void RewriteModernObjC::RewriteForwardClassDecl(
1090 const SmallVectorImpl<Decl *> &D) {
1091 std::string typedefString;
1092 for (unsigned i = 0; i < D.size(); i++) {
1093 ObjCInterfaceDecl *ForwardDecl = cast<ObjCInterfaceDecl>(D[i]);
1094 if (i == 0) {
1095 typedefString += "// @class ";
1096 typedefString += ForwardDecl->getNameAsString();
1097 typedefString += ";";
1098 }
1099 RewriteOneForwardClassDecl(ForwardDecl, typedefString);
1100 }
1101 RewriteForwardClassEpilogue(cast<ObjCInterfaceDecl>(D[0]), typedefString);
1102}
1103
1104void RewriteModernObjC::RewriteMethodDeclaration(ObjCMethodDecl *Method) {
1105 // When method is a synthesized one, such as a getter/setter there is
1106 // nothing to rewrite.
1107 if (Method->isImplicit())
1108 return;
1109 SourceLocation LocStart = Method->getBeginLoc();
1110 SourceLocation LocEnd = Method->getEndLoc();
1111
1112 if (SM->getExpansionLineNumber(LocEnd) >
1113 SM->getExpansionLineNumber(LocStart)) {
1114 InsertText(LocStart, "#if 0\n");
1115 ReplaceText(LocEnd, 1, ";\n#endif\n");
1116 } else {
1117 InsertText(LocStart, "// ");
1118 }
1119}
1120
1121void RewriteModernObjC::RewriteProperty(ObjCPropertyDecl *prop) {
1122 SourceLocation Loc = prop->getAtLoc();
1123
1124 ReplaceText(Loc, 0, "// ");
1125 // FIXME: handle properties that are declared across multiple lines.
1126}
1127
1128void RewriteModernObjC::RewriteCategoryDecl(ObjCCategoryDecl *CatDecl) {
1129 SourceLocation LocStart = CatDecl->getBeginLoc();
1130
1131 // FIXME: handle category headers that are declared across multiple lines.
1132 if (CatDecl->getIvarRBraceLoc().isValid()) {
1133 ReplaceText(LocStart, 1, "/** ");
1134 ReplaceText(CatDecl->getIvarRBraceLoc(), 1, "**/ ");
1135 }
1136 else {
1137 ReplaceText(LocStart, 0, "// ");
1138 }
1139
1140 for (auto *I : CatDecl->instance_properties())
1141 RewriteProperty(I);
1142
1143 for (auto *I : CatDecl->instance_methods())
1144 RewriteMethodDeclaration(I);
1145 for (auto *I : CatDecl->class_methods())
1146 RewriteMethodDeclaration(I);
1147
1148 // Lastly, comment out the @end.
1149 ReplaceText(CatDecl->getAtEndRange().getBegin(),
1150 strlen("@end"), "/* @end */\n");
1151}
1152
1153void RewriteModernObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
1154 SourceLocation LocStart = PDecl->getBeginLoc();
1155 assert(PDecl->isThisDeclarationADefinition())((PDecl->isThisDeclarationADefinition()) ? static_cast<
void> (0) : __assert_fail ("PDecl->isThisDeclarationADefinition()"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1155, __PRETTY_FUNCTION__))
;
1156
1157 // FIXME: handle protocol headers that are declared across multiple lines.
1158 ReplaceText(LocStart, 0, "// ");
1159
1160 for (auto *I : PDecl->instance_methods())
1161 RewriteMethodDeclaration(I);
1162 for (auto *I : PDecl->class_methods())
1163 RewriteMethodDeclaration(I);
1164 for (auto *I : PDecl->instance_properties())
1165 RewriteProperty(I);
1166
1167 // Lastly, comment out the @end.
1168 SourceLocation LocEnd = PDecl->getAtEndRange().getBegin();
1169 ReplaceText(LocEnd, strlen("@end"), "/* @end */\n");
1170
1171 // Must comment out @optional/@required
1172 const char *startBuf = SM->getCharacterData(LocStart);
1173 const char *endBuf = SM->getCharacterData(LocEnd);
1174 for (const char *p = startBuf; p < endBuf; p++) {
1175 if (*p == '@' && !strncmp(p+1, "optional", strlen("optional"))) {
1176 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1177 ReplaceText(OptionalLoc, strlen("@optional"), "/* @optional */");
1178
1179 }
1180 else if (*p == '@' && !strncmp(p+1, "required", strlen("required"))) {
1181 SourceLocation OptionalLoc = LocStart.getLocWithOffset(p-startBuf);
1182 ReplaceText(OptionalLoc, strlen("@required"), "/* @required */");
1183
1184 }
1185 }
1186}
1187
1188void RewriteModernObjC::RewriteForwardProtocolDecl(DeclGroupRef D) {
1189 SourceLocation LocStart = (*D.begin())->getBeginLoc();
1190 if (LocStart.isInvalid())
1191 llvm_unreachable("Invalid SourceLocation")::llvm::llvm_unreachable_internal("Invalid SourceLocation", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1191)
;
1192 // FIXME: handle forward protocol that are declared across multiple lines.
1193 ReplaceText(LocStart, 0, "// ");
1194}
1195
1196void
1197RewriteModernObjC::RewriteForwardProtocolDecl(const SmallVectorImpl<Decl *> &DG) {
1198 SourceLocation LocStart = DG[0]->getBeginLoc();
1199 if (LocStart.isInvalid())
1200 llvm_unreachable("Invalid SourceLocation")::llvm::llvm_unreachable_internal("Invalid SourceLocation", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1200)
;
1201 // FIXME: handle forward protocol that are declared across multiple lines.
1202 ReplaceText(LocStart, 0, "// ");
1203}
1204
1205void RewriteModernObjC::RewriteTypeIntoString(QualType T, std::string &ResultStr,
1206 const FunctionType *&FPRetType) {
1207 if (T->isObjCQualifiedIdType())
1208 ResultStr += "id";
1209 else if (T->isFunctionPointerType() ||
1210 T->isBlockPointerType()) {
1211 // needs special handling, since pointer-to-functions have special
1212 // syntax (where a decaration models use).
1213 QualType retType = T;
1214 QualType PointeeTy;
1215 if (const PointerType* PT = retType->getAs<PointerType>())
1216 PointeeTy = PT->getPointeeType();
1217 else if (const BlockPointerType *BPT = retType->getAs<BlockPointerType>())
1218 PointeeTy = BPT->getPointeeType();
1219 if ((FPRetType = PointeeTy->getAs<FunctionType>())) {
1220 ResultStr +=
1221 FPRetType->getReturnType().getAsString(Context->getPrintingPolicy());
1222 ResultStr += "(*";
1223 }
1224 } else
1225 ResultStr += T.getAsString(Context->getPrintingPolicy());
1226}
1227
1228void RewriteModernObjC::RewriteObjCMethodDecl(const ObjCInterfaceDecl *IDecl,
1229 ObjCMethodDecl *OMD,
1230 std::string &ResultStr) {
1231 //fprintf(stderr,"In RewriteObjCMethodDecl\n");
1232 const FunctionType *FPRetType = nullptr;
1233 ResultStr += "\nstatic ";
1234 RewriteTypeIntoString(OMD->getReturnType(), ResultStr, FPRetType);
1235 ResultStr += " ";
1236
1237 // Unique method name
1238 std::string NameStr;
1239
1240 if (OMD->isInstanceMethod())
1241 NameStr += "_I_";
1242 else
1243 NameStr += "_C_";
1244
1245 NameStr += IDecl->getNameAsString();
1246 NameStr += "_";
1247
1248 if (ObjCCategoryImplDecl *CID =
1249 dyn_cast<ObjCCategoryImplDecl>(OMD->getDeclContext())) {
1250 NameStr += CID->getNameAsString();
1251 NameStr += "_";
1252 }
1253 // Append selector names, replacing ':' with '_'
1254 {
1255 std::string selString = OMD->getSelector().getAsString();
1256 int len = selString.size();
1257 for (int i = 0; i < len; i++)
1258 if (selString[i] == ':')
1259 selString[i] = '_';
1260 NameStr += selString;
1261 }
1262 // Remember this name for metadata emission
1263 MethodInternalNames[OMD] = NameStr;
1264 ResultStr += NameStr;
1265
1266 // Rewrite arguments
1267 ResultStr += "(";
1268
1269 // invisible arguments
1270 if (OMD->isInstanceMethod()) {
1271 QualType selfTy = Context->getObjCInterfaceType(IDecl);
1272 selfTy = Context->getPointerType(selfTy);
1273 if (!LangOpts.MicrosoftExt) {
1274 if (ObjCSynthesizedStructs.count(const_cast<ObjCInterfaceDecl*>(IDecl)))
1275 ResultStr += "struct ";
1276 }
1277 // When rewriting for Microsoft, explicitly omit the structure name.
1278 ResultStr += IDecl->getNameAsString();
1279 ResultStr += " *";
1280 }
1281 else
1282 ResultStr += Context->getObjCClassType().getAsString(
1283 Context->getPrintingPolicy());
1284
1285 ResultStr += " self, ";
1286 ResultStr += Context->getObjCSelType().getAsString(Context->getPrintingPolicy());
1287 ResultStr += " _cmd";
1288
1289 // Method arguments.
1290 for (const auto *PDecl : OMD->parameters()) {
1291 ResultStr += ", ";
1292 if (PDecl->getType()->isObjCQualifiedIdType()) {
1293 ResultStr += "id ";
1294 ResultStr += PDecl->getNameAsString();
1295 } else {
1296 std::string Name = PDecl->getNameAsString();
1297 QualType QT = PDecl->getType();
1298 // Make sure we convert "t (^)(...)" to "t (*)(...)".
1299 (void)convertBlockPointerToFunctionPointer(QT);
1300 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
1301 ResultStr += Name;
1302 }
1303 }
1304 if (OMD->isVariadic())
1305 ResultStr += ", ...";
1306 ResultStr += ") ";
1307
1308 if (FPRetType) {
1309 ResultStr += ")"; // close the precedence "scope" for "*".
1310
1311 // Now, emit the argument types (if any).
1312 if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(FPRetType)) {
1313 ResultStr += "(";
1314 for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) {
1315 if (i) ResultStr += ", ";
1316 std::string ParamStr =
1317 FT->getParamType(i).getAsString(Context->getPrintingPolicy());
1318 ResultStr += ParamStr;
1319 }
1320 if (FT->isVariadic()) {
1321 if (FT->getNumParams())
1322 ResultStr += ", ";
1323 ResultStr += "...";
1324 }
1325 ResultStr += ")";
1326 } else {
1327 ResultStr += "()";
1328 }
1329 }
1330}
1331
1332void RewriteModernObjC::RewriteImplementationDecl(Decl *OID) {
1333 ObjCImplementationDecl *IMD = dyn_cast<ObjCImplementationDecl>(OID);
14
Assuming 'OID' is not a 'ObjCImplementationDecl'
1334 ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(OID);
15
Assuming 'OID' is not a 'ObjCCategoryImplDecl'
16
'CID' initialized to a null pointer value
1335
1336 if (IMD
16.1
'IMD' is null
) {
17
Taking false branch
1337 if (IMD->getIvarRBraceLoc().isValid()) {
1338 ReplaceText(IMD->getBeginLoc(), 1, "/** ");
1339 ReplaceText(IMD->getIvarRBraceLoc(), 1, "**/ ");
1340 }
1341 else {
1342 InsertText(IMD->getBeginLoc(), "// ");
1343 }
1344 }
1345 else
1346 InsertText(CID->getBeginLoc(), "// ");
18
Called C++ object pointer is null
1347
1348 for (auto *OMD : IMD ? IMD->instance_methods() : CID->instance_methods()) {
1349 std::string ResultStr;
1350 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1351 SourceLocation LocStart = OMD->getBeginLoc();
1352 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1353
1354 const char *startBuf = SM->getCharacterData(LocStart);
1355 const char *endBuf = SM->getCharacterData(LocEnd);
1356 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1357 }
1358
1359 for (auto *OMD : IMD ? IMD->class_methods() : CID->class_methods()) {
1360 std::string ResultStr;
1361 RewriteObjCMethodDecl(OMD->getClassInterface(), OMD, ResultStr);
1362 SourceLocation LocStart = OMD->getBeginLoc();
1363 SourceLocation LocEnd = OMD->getCompoundBody()->getBeginLoc();
1364
1365 const char *startBuf = SM->getCharacterData(LocStart);
1366 const char *endBuf = SM->getCharacterData(LocEnd);
1367 ReplaceText(LocStart, endBuf-startBuf, ResultStr);
1368 }
1369 for (auto *I : IMD ? IMD->property_impls() : CID->property_impls())
1370 RewritePropertyImplDecl(I, IMD, CID);
1371
1372 InsertText(IMD ? IMD->getEndLoc() : CID->getEndLoc(), "// ");
1373}
1374
1375void RewriteModernObjC::RewriteInterfaceDecl(ObjCInterfaceDecl *ClassDecl) {
1376 // Do not synthesize more than once.
1377 if (ObjCSynthesizedStructs.count(ClassDecl))
1378 return;
1379 // Make sure super class's are written before current class is written.
1380 ObjCInterfaceDecl *SuperClass = ClassDecl->getSuperClass();
1381 while (SuperClass) {
1382 RewriteInterfaceDecl(SuperClass);
1383 SuperClass = SuperClass->getSuperClass();
1384 }
1385 std::string ResultStr;
1386 if (!ObjCWrittenInterfaces.count(ClassDecl->getCanonicalDecl())) {
1387 // we haven't seen a forward decl - generate a typedef.
1388 RewriteOneForwardClassDecl(ClassDecl, ResultStr);
1389 RewriteIvarOffsetSymbols(ClassDecl, ResultStr);
1390
1391 RewriteObjCInternalStruct(ClassDecl, ResultStr);
1392 // Mark this typedef as having been written into its c++ equivalent.
1393 ObjCWrittenInterfaces.insert(ClassDecl->getCanonicalDecl());
1394
1395 for (auto *I : ClassDecl->instance_properties())
1396 RewriteProperty(I);
1397 for (auto *I : ClassDecl->instance_methods())
1398 RewriteMethodDeclaration(I);
1399 for (auto *I : ClassDecl->class_methods())
1400 RewriteMethodDeclaration(I);
1401
1402 // Lastly, comment out the @end.
1403 ReplaceText(ClassDecl->getAtEndRange().getBegin(), strlen("@end"),
1404 "/* @end */\n");
1405 }
1406}
1407
1408Stmt *RewriteModernObjC::RewritePropertyOrImplicitSetter(PseudoObjectExpr *PseudoOp) {
1409 SourceRange OldRange = PseudoOp->getSourceRange();
1410
1411 // We just magically know some things about the structure of this
1412 // expression.
1413 ObjCMessageExpr *OldMsg =
1414 cast<ObjCMessageExpr>(PseudoOp->getSemanticExpr(
1415 PseudoOp->getNumSemanticExprs() - 1));
1416
1417 // Because the rewriter doesn't allow us to rewrite rewritten code,
1418 // we need to suppress rewriting the sub-statements.
1419 Expr *Base;
1420 SmallVector<Expr*, 2> Args;
1421 {
1422 DisableReplaceStmtScope S(*this);
1423
1424 // Rebuild the base expression if we have one.
1425 Base = nullptr;
1426 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1427 Base = OldMsg->getInstanceReceiver();
1428 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1429 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1430 }
1431
1432 unsigned numArgs = OldMsg->getNumArgs();
1433 for (unsigned i = 0; i < numArgs; i++) {
1434 Expr *Arg = OldMsg->getArg(i);
1435 if (isa<OpaqueValueExpr>(Arg))
1436 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1437 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1438 Args.push_back(Arg);
1439 }
1440 }
1441
1442 // TODO: avoid this copy.
1443 SmallVector<SourceLocation, 1> SelLocs;
1444 OldMsg->getSelectorLocs(SelLocs);
1445
1446 ObjCMessageExpr *NewMsg = nullptr;
1447 switch (OldMsg->getReceiverKind()) {
1448 case ObjCMessageExpr::Class:
1449 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1450 OldMsg->getValueKind(),
1451 OldMsg->getLeftLoc(),
1452 OldMsg->getClassReceiverTypeInfo(),
1453 OldMsg->getSelector(),
1454 SelLocs,
1455 OldMsg->getMethodDecl(),
1456 Args,
1457 OldMsg->getRightLoc(),
1458 OldMsg->isImplicit());
1459 break;
1460
1461 case ObjCMessageExpr::Instance:
1462 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1463 OldMsg->getValueKind(),
1464 OldMsg->getLeftLoc(),
1465 Base,
1466 OldMsg->getSelector(),
1467 SelLocs,
1468 OldMsg->getMethodDecl(),
1469 Args,
1470 OldMsg->getRightLoc(),
1471 OldMsg->isImplicit());
1472 break;
1473
1474 case ObjCMessageExpr::SuperClass:
1475 case ObjCMessageExpr::SuperInstance:
1476 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1477 OldMsg->getValueKind(),
1478 OldMsg->getLeftLoc(),
1479 OldMsg->getSuperLoc(),
1480 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1481 OldMsg->getSuperType(),
1482 OldMsg->getSelector(),
1483 SelLocs,
1484 OldMsg->getMethodDecl(),
1485 Args,
1486 OldMsg->getRightLoc(),
1487 OldMsg->isImplicit());
1488 break;
1489 }
1490
1491 Stmt *Replacement = SynthMessageExpr(NewMsg);
1492 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1493 return Replacement;
1494}
1495
1496Stmt *RewriteModernObjC::RewritePropertyOrImplicitGetter(PseudoObjectExpr *PseudoOp) {
1497 SourceRange OldRange = PseudoOp->getSourceRange();
1498
1499 // We just magically know some things about the structure of this
1500 // expression.
1501 ObjCMessageExpr *OldMsg =
1502 cast<ObjCMessageExpr>(PseudoOp->getResultExpr()->IgnoreImplicit());
1503
1504 // Because the rewriter doesn't allow us to rewrite rewritten code,
1505 // we need to suppress rewriting the sub-statements.
1506 Expr *Base = nullptr;
1507 SmallVector<Expr*, 1> Args;
1508 {
1509 DisableReplaceStmtScope S(*this);
1510 // Rebuild the base expression if we have one.
1511 if (OldMsg->getReceiverKind() == ObjCMessageExpr::Instance) {
1512 Base = OldMsg->getInstanceReceiver();
1513 Base = cast<OpaqueValueExpr>(Base)->getSourceExpr();
1514 Base = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Base));
1515 }
1516 unsigned numArgs = OldMsg->getNumArgs();
1517 for (unsigned i = 0; i < numArgs; i++) {
1518 Expr *Arg = OldMsg->getArg(i);
1519 if (isa<OpaqueValueExpr>(Arg))
1520 Arg = cast<OpaqueValueExpr>(Arg)->getSourceExpr();
1521 Arg = cast<Expr>(RewriteFunctionBodyOrGlobalInitializer(Arg));
1522 Args.push_back(Arg);
1523 }
1524 }
1525
1526 // Intentionally empty.
1527 SmallVector<SourceLocation, 1> SelLocs;
1528
1529 ObjCMessageExpr *NewMsg = nullptr;
1530 switch (OldMsg->getReceiverKind()) {
1531 case ObjCMessageExpr::Class:
1532 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1533 OldMsg->getValueKind(),
1534 OldMsg->getLeftLoc(),
1535 OldMsg->getClassReceiverTypeInfo(),
1536 OldMsg->getSelector(),
1537 SelLocs,
1538 OldMsg->getMethodDecl(),
1539 Args,
1540 OldMsg->getRightLoc(),
1541 OldMsg->isImplicit());
1542 break;
1543
1544 case ObjCMessageExpr::Instance:
1545 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1546 OldMsg->getValueKind(),
1547 OldMsg->getLeftLoc(),
1548 Base,
1549 OldMsg->getSelector(),
1550 SelLocs,
1551 OldMsg->getMethodDecl(),
1552 Args,
1553 OldMsg->getRightLoc(),
1554 OldMsg->isImplicit());
1555 break;
1556
1557 case ObjCMessageExpr::SuperClass:
1558 case ObjCMessageExpr::SuperInstance:
1559 NewMsg = ObjCMessageExpr::Create(*Context, OldMsg->getType(),
1560 OldMsg->getValueKind(),
1561 OldMsg->getLeftLoc(),
1562 OldMsg->getSuperLoc(),
1563 OldMsg->getReceiverKind() == ObjCMessageExpr::SuperInstance,
1564 OldMsg->getSuperType(),
1565 OldMsg->getSelector(),
1566 SelLocs,
1567 OldMsg->getMethodDecl(),
1568 Args,
1569 OldMsg->getRightLoc(),
1570 OldMsg->isImplicit());
1571 break;
1572 }
1573
1574 Stmt *Replacement = SynthMessageExpr(NewMsg);
1575 ReplaceStmtWithRange(PseudoOp, Replacement, OldRange);
1576 return Replacement;
1577}
1578
1579/// SynthCountByEnumWithState - To print:
1580/// ((NSUInteger (*)
1581/// (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1582/// (void *)objc_msgSend)((id)l_collection,
1583/// sel_registerName(
1584/// "countByEnumeratingWithState:objects:count:"),
1585/// &enumState,
1586/// (id *)__rw_items, (NSUInteger)16)
1587///
1588void RewriteModernObjC::SynthCountByEnumWithState(std::string &buf) {
1589 buf += "((_WIN_NSUInteger (*) (id, SEL, struct __objcFastEnumerationState *, "
1590 "id *, _WIN_NSUInteger))(void *)objc_msgSend)";
1591 buf += "\n\t\t";
1592 buf += "((id)l_collection,\n\t\t";
1593 buf += "sel_registerName(\"countByEnumeratingWithState:objects:count:\"),";
1594 buf += "\n\t\t";
1595 buf += "&enumState, "
1596 "(id *)__rw_items, (_WIN_NSUInteger)16)";
1597}
1598
1599/// RewriteBreakStmt - Rewrite for a break-stmt inside an ObjC2's foreach
1600/// statement to exit to its outer synthesized loop.
1601///
1602Stmt *RewriteModernObjC::RewriteBreakStmt(BreakStmt *S) {
1603 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1604 return S;
1605 // replace break with goto __break_label
1606 std::string buf;
1607
1608 SourceLocation startLoc = S->getBeginLoc();
1609 buf = "goto __break_label_";
1610 buf += utostr(ObjCBcLabelNo.back());
1611 ReplaceText(startLoc, strlen("break"), buf);
1612
1613 return nullptr;
1614}
1615
1616void RewriteModernObjC::ConvertSourceLocationToLineDirective(
1617 SourceLocation Loc,
1618 std::string &LineString) {
1619 if (Loc.isFileID() && GenerateLineInfo) {
1620 LineString += "\n#line ";
1621 PresumedLoc PLoc = SM->getPresumedLoc(Loc);
1622 LineString += utostr(PLoc.getLine());
1623 LineString += " \"";
1624 LineString += Lexer::Stringify(PLoc.getFilename());
1625 LineString += "\"\n";
1626 }
1627}
1628
1629/// RewriteContinueStmt - Rewrite for a continue-stmt inside an ObjC2's foreach
1630/// statement to continue with its inner synthesized loop.
1631///
1632Stmt *RewriteModernObjC::RewriteContinueStmt(ContinueStmt *S) {
1633 if (Stmts.empty() || !isa<ObjCForCollectionStmt>(Stmts.back()))
1634 return S;
1635 // replace continue with goto __continue_label
1636 std::string buf;
1637
1638 SourceLocation startLoc = S->getBeginLoc();
1639 buf = "goto __continue_label_";
1640 buf += utostr(ObjCBcLabelNo.back());
1641 ReplaceText(startLoc, strlen("continue"), buf);
1642
1643 return nullptr;
1644}
1645
1646/// RewriteObjCForCollectionStmt - Rewriter for ObjC2's foreach statement.
1647/// It rewrites:
1648/// for ( type elem in collection) { stmts; }
1649
1650/// Into:
1651/// {
1652/// type elem;
1653/// struct __objcFastEnumerationState enumState = { 0 };
1654/// id __rw_items[16];
1655/// id l_collection = (id)collection;
1656/// NSUInteger limit = [l_collection countByEnumeratingWithState:&enumState
1657/// objects:__rw_items count:16];
1658/// if (limit) {
1659/// unsigned long startMutations = *enumState.mutationsPtr;
1660/// do {
1661/// unsigned long counter = 0;
1662/// do {
1663/// if (startMutations != *enumState.mutationsPtr)
1664/// objc_enumerationMutation(l_collection);
1665/// elem = (type)enumState.itemsPtr[counter++];
1666/// stmts;
1667/// __continue_label: ;
1668/// } while (counter < limit);
1669/// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1670/// objects:__rw_items count:16]));
1671/// elem = nil;
1672/// __break_label: ;
1673/// }
1674/// else
1675/// elem = nil;
1676/// }
1677///
1678Stmt *RewriteModernObjC::RewriteObjCForCollectionStmt(ObjCForCollectionStmt *S,
1679 SourceLocation OrigEnd) {
1680 assert(!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty")((!Stmts.empty() && "ObjCForCollectionStmt - Statement stack empty"
) ? static_cast<void> (0) : __assert_fail ("!Stmts.empty() && \"ObjCForCollectionStmt - Statement stack empty\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1680, __PRETTY_FUNCTION__))
;
1681 assert(isa<ObjCForCollectionStmt>(Stmts.back()) &&((isa<ObjCForCollectionStmt>(Stmts.back()) && "ObjCForCollectionStmt Statement stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCForCollectionStmt>(Stmts.back()) && \"ObjCForCollectionStmt Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1682, __PRETTY_FUNCTION__))
1682 "ObjCForCollectionStmt Statement stack mismatch")((isa<ObjCForCollectionStmt>(Stmts.back()) && "ObjCForCollectionStmt Statement stack mismatch"
) ? static_cast<void> (0) : __assert_fail ("isa<ObjCForCollectionStmt>(Stmts.back()) && \"ObjCForCollectionStmt Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1682, __PRETTY_FUNCTION__))
;
1683 assert(!ObjCBcLabelNo.empty() &&((!ObjCBcLabelNo.empty() && "ObjCForCollectionStmt - Label No stack empty"
) ? static_cast<void> (0) : __assert_fail ("!ObjCBcLabelNo.empty() && \"ObjCForCollectionStmt - Label No stack empty\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1684, __PRETTY_FUNCTION__))
1684 "ObjCForCollectionStmt - Label No stack empty")((!ObjCBcLabelNo.empty() && "ObjCForCollectionStmt - Label No stack empty"
) ? static_cast<void> (0) : __assert_fail ("!ObjCBcLabelNo.empty() && \"ObjCForCollectionStmt - Label No stack empty\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1684, __PRETTY_FUNCTION__))
;
1685
1686 SourceLocation startLoc = S->getBeginLoc();
1687 const char *startBuf = SM->getCharacterData(startLoc);
1688 StringRef elementName;
1689 std::string elementTypeAsString;
1690 std::string buf;
1691 // line directive first.
1692 SourceLocation ForEachLoc = S->getForLoc();
1693 ConvertSourceLocationToLineDirective(ForEachLoc, buf);
1694 buf += "{\n\t";
1695 if (DeclStmt *DS = dyn_cast<DeclStmt>(S->getElement())) {
1696 // type elem;
1697 NamedDecl* D = cast<NamedDecl>(DS->getSingleDecl());
1698 QualType ElementType = cast<ValueDecl>(D)->getType();
1699 if (ElementType->isObjCQualifiedIdType() ||
1700 ElementType->isObjCQualifiedInterfaceType())
1701 // Simply use 'id' for all qualified types.
1702 elementTypeAsString = "id";
1703 else
1704 elementTypeAsString = ElementType.getAsString(Context->getPrintingPolicy());
1705 buf += elementTypeAsString;
1706 buf += " ";
1707 elementName = D->getName();
1708 buf += elementName;
1709 buf += ";\n\t";
1710 }
1711 else {
1712 DeclRefExpr *DR = cast<DeclRefExpr>(S->getElement());
1713 elementName = DR->getDecl()->getName();
1714 ValueDecl *VD = DR->getDecl();
1715 if (VD->getType()->isObjCQualifiedIdType() ||
1716 VD->getType()->isObjCQualifiedInterfaceType())
1717 // Simply use 'id' for all qualified types.
1718 elementTypeAsString = "id";
1719 else
1720 elementTypeAsString = VD->getType().getAsString(Context->getPrintingPolicy());
1721 }
1722
1723 // struct __objcFastEnumerationState enumState = { 0 };
1724 buf += "struct __objcFastEnumerationState enumState = { 0 };\n\t";
1725 // id __rw_items[16];
1726 buf += "id __rw_items[16];\n\t";
1727 // id l_collection = (id)
1728 buf += "id l_collection = (id)";
1729 // Find start location of 'collection' the hard way!
1730 const char *startCollectionBuf = startBuf;
1731 startCollectionBuf += 3; // skip 'for'
1732 startCollectionBuf = strchr(startCollectionBuf, '(');
1733 startCollectionBuf++; // skip '('
1734 // find 'in' and skip it.
1735 while (*startCollectionBuf != ' ' ||
1736 *(startCollectionBuf+1) != 'i' || *(startCollectionBuf+2) != 'n' ||
1737 (*(startCollectionBuf+3) != ' ' &&
1738 *(startCollectionBuf+3) != '[' && *(startCollectionBuf+3) != '('))
1739 startCollectionBuf++;
1740 startCollectionBuf += 3;
1741
1742 // Replace: "for (type element in" with string constructed thus far.
1743 ReplaceText(startLoc, startCollectionBuf - startBuf, buf);
1744 // Replace ')' in for '(' type elem in collection ')' with ';'
1745 SourceLocation rightParenLoc = S->getRParenLoc();
1746 const char *rparenBuf = SM->getCharacterData(rightParenLoc);
1747 SourceLocation lparenLoc = startLoc.getLocWithOffset(rparenBuf-startBuf);
1748 buf = ";\n\t";
1749
1750 // unsigned long limit = [l_collection countByEnumeratingWithState:&enumState
1751 // objects:__rw_items count:16];
1752 // which is synthesized into:
1753 // NSUInteger limit =
1754 // ((NSUInteger (*)
1755 // (id, SEL, struct __objcFastEnumerationState *, id *, NSUInteger))
1756 // (void *)objc_msgSend)((id)l_collection,
1757 // sel_registerName(
1758 // "countByEnumeratingWithState:objects:count:"),
1759 // (struct __objcFastEnumerationState *)&state,
1760 // (id *)__rw_items, (NSUInteger)16);
1761 buf += "_WIN_NSUInteger limit =\n\t\t";
1762 SynthCountByEnumWithState(buf);
1763 buf += ";\n\t";
1764 /// if (limit) {
1765 /// unsigned long startMutations = *enumState.mutationsPtr;
1766 /// do {
1767 /// unsigned long counter = 0;
1768 /// do {
1769 /// if (startMutations != *enumState.mutationsPtr)
1770 /// objc_enumerationMutation(l_collection);
1771 /// elem = (type)enumState.itemsPtr[counter++];
1772 buf += "if (limit) {\n\t";
1773 buf += "unsigned long startMutations = *enumState.mutationsPtr;\n\t";
1774 buf += "do {\n\t\t";
1775 buf += "unsigned long counter = 0;\n\t\t";
1776 buf += "do {\n\t\t\t";
1777 buf += "if (startMutations != *enumState.mutationsPtr)\n\t\t\t\t";
1778 buf += "objc_enumerationMutation(l_collection);\n\t\t\t";
1779 buf += elementName;
1780 buf += " = (";
1781 buf += elementTypeAsString;
1782 buf += ")enumState.itemsPtr[counter++];";
1783 // Replace ')' in for '(' type elem in collection ')' with all of these.
1784 ReplaceText(lparenLoc, 1, buf);
1785
1786 /// __continue_label: ;
1787 /// } while (counter < limit);
1788 /// } while ((limit = [l_collection countByEnumeratingWithState:&enumState
1789 /// objects:__rw_items count:16]));
1790 /// elem = nil;
1791 /// __break_label: ;
1792 /// }
1793 /// else
1794 /// elem = nil;
1795 /// }
1796 ///
1797 buf = ";\n\t";
1798 buf += "__continue_label_";
1799 buf += utostr(ObjCBcLabelNo.back());
1800 buf += ": ;";
1801 buf += "\n\t\t";
1802 buf += "} while (counter < limit);\n\t";
1803 buf += "} while ((limit = ";
1804 SynthCountByEnumWithState(buf);
1805 buf += "));\n\t";
1806 buf += elementName;
1807 buf += " = ((";
1808 buf += elementTypeAsString;
1809 buf += ")0);\n\t";
1810 buf += "__break_label_";
1811 buf += utostr(ObjCBcLabelNo.back());
1812 buf += ": ;\n\t";
1813 buf += "}\n\t";
1814 buf += "else\n\t\t";
1815 buf += elementName;
1816 buf += " = ((";
1817 buf += elementTypeAsString;
1818 buf += ")0);\n\t";
1819 buf += "}\n";
1820
1821 // Insert all these *after* the statement body.
1822 // FIXME: If this should support Obj-C++, support CXXTryStmt
1823 if (isa<CompoundStmt>(S->getBody())) {
1824 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(1);
1825 InsertText(endBodyLoc, buf);
1826 } else {
1827 /* Need to treat single statements specially. For example:
1828 *
1829 * for (A *a in b) if (stuff()) break;
1830 * for (A *a in b) xxxyy;
1831 *
1832 * The following code simply scans ahead to the semi to find the actual end.
1833 */
1834 const char *stmtBuf = SM->getCharacterData(OrigEnd);
1835 const char *semiBuf = strchr(stmtBuf, ';');
1836 assert(semiBuf && "Can't find ';'")((semiBuf && "Can't find ';'") ? static_cast<void>
(0) : __assert_fail ("semiBuf && \"Can't find ';'\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1836, __PRETTY_FUNCTION__))
;
1837 SourceLocation endBodyLoc = OrigEnd.getLocWithOffset(semiBuf-stmtBuf+1);
1838 InsertText(endBodyLoc, buf);
1839 }
1840 Stmts.pop_back();
1841 ObjCBcLabelNo.pop_back();
1842 return nullptr;
1843}
1844
1845static void Write_RethrowObject(std::string &buf) {
1846 buf += "{ struct _FIN { _FIN(id reth) : rethrow(reth) {}\n";
1847 buf += "\t~_FIN() { if (rethrow) objc_exception_throw(rethrow); }\n";
1848 buf += "\tid rethrow;\n";
1849 buf += "\t} _fin_force_rethow(_rethrow);";
1850}
1851
1852/// RewriteObjCSynchronizedStmt -
1853/// This routine rewrites @synchronized(expr) stmt;
1854/// into:
1855/// objc_sync_enter(expr);
1856/// @try stmt @finally { objc_sync_exit(expr); }
1857///
1858Stmt *RewriteModernObjC::RewriteObjCSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
1859 // Get the start location and compute the semi location.
1860 SourceLocation startLoc = S->getBeginLoc();
1861 const char *startBuf = SM->getCharacterData(startLoc);
1862
1863 assert((*startBuf == '@') && "bogus @synchronized location")(((*startBuf == '@') && "bogus @synchronized location"
) ? static_cast<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @synchronized location\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1863, __PRETTY_FUNCTION__))
;
1864
1865 std::string buf;
1866 SourceLocation SynchLoc = S->getAtSynchronizedLoc();
1867 ConvertSourceLocationToLineDirective(SynchLoc, buf);
1868 buf += "{ id _rethrow = 0; id _sync_obj = (id)";
1869
1870 const char *lparenBuf = startBuf;
1871 while (*lparenBuf != '(') lparenBuf++;
1872 ReplaceText(startLoc, lparenBuf-startBuf+1, buf);
1873
1874 buf = "; objc_sync_enter(_sync_obj);\n";
1875 buf += "try {\n\tstruct _SYNC_EXIT { _SYNC_EXIT(id arg) : sync_exit(arg) {}";
1876 buf += "\n\t~_SYNC_EXIT() {objc_sync_exit(sync_exit);}";
1877 buf += "\n\tid sync_exit;";
1878 buf += "\n\t} _sync_exit(_sync_obj);\n";
1879
1880 // We can't use S->getSynchExpr()->getEndLoc() to find the end location, since
1881 // the sync expression is typically a message expression that's already
1882 // been rewritten! (which implies the SourceLocation's are invalid).
1883 SourceLocation RParenExprLoc = S->getSynchBody()->getBeginLoc();
1884 const char *RParenExprLocBuf = SM->getCharacterData(RParenExprLoc);
1885 while (*RParenExprLocBuf != ')') RParenExprLocBuf--;
1886 RParenExprLoc = startLoc.getLocWithOffset(RParenExprLocBuf-startBuf);
1887
1888 SourceLocation LBranceLoc = S->getSynchBody()->getBeginLoc();
1889 const char *LBraceLocBuf = SM->getCharacterData(LBranceLoc);
1890 assert (*LBraceLocBuf == '{')((*LBraceLocBuf == '{') ? static_cast<void> (0) : __assert_fail
("*LBraceLocBuf == '{'", "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1890, __PRETTY_FUNCTION__))
;
1891 ReplaceText(RParenExprLoc, (LBraceLocBuf - SM->getCharacterData(RParenExprLoc) + 1), buf);
1892
1893 SourceLocation startRBraceLoc = S->getSynchBody()->getEndLoc();
1894 assert((*SM->getCharacterData(startRBraceLoc) == '}') &&(((*SM->getCharacterData(startRBraceLoc) == '}') &&
"bogus @synchronized block") ? static_cast<void> (0) :
__assert_fail ("(*SM->getCharacterData(startRBraceLoc) == '}') && \"bogus @synchronized block\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1895, __PRETTY_FUNCTION__))
1895 "bogus @synchronized block")(((*SM->getCharacterData(startRBraceLoc) == '}') &&
"bogus @synchronized block") ? static_cast<void> (0) :
__assert_fail ("(*SM->getCharacterData(startRBraceLoc) == '}') && \"bogus @synchronized block\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1895, __PRETTY_FUNCTION__))
;
1896
1897 buf = "} catch (id e) {_rethrow = e;}\n";
1898 Write_RethrowObject(buf);
1899 buf += "}\n";
1900 buf += "}\n";
1901
1902 ReplaceText(startRBraceLoc, 1, buf);
1903
1904 return nullptr;
1905}
1906
1907void RewriteModernObjC::WarnAboutReturnGotoStmts(Stmt *S)
1908{
1909 // Perform a bottom up traversal of all children.
1910 for (Stmt *SubStmt : S->children())
1911 if (SubStmt)
1912 WarnAboutReturnGotoStmts(SubStmt);
1913
1914 if (isa<ReturnStmt>(S) || isa<GotoStmt>(S)) {
1915 Diags.Report(Context->getFullLoc(S->getBeginLoc()),
1916 TryFinallyContainsReturnDiag);
1917 }
1918}
1919
1920Stmt *RewriteModernObjC::RewriteObjCAutoreleasePoolStmt(ObjCAutoreleasePoolStmt *S) {
1921 SourceLocation startLoc = S->getAtLoc();
1922 ReplaceText(startLoc, strlen("@autoreleasepool"), "/* @autoreleasepool */");
1923 ReplaceText(S->getSubStmt()->getBeginLoc(), 1,
1924 "{ __AtAutoreleasePool __autoreleasepool; ");
1925
1926 return nullptr;
1927}
1928
1929Stmt *RewriteModernObjC::RewriteObjCTryStmt(ObjCAtTryStmt *S) {
1930 ObjCAtFinallyStmt *finalStmt = S->getFinallyStmt();
1931 bool noCatch = S->getNumCatchStmts() == 0;
1932 std::string buf;
1933 SourceLocation TryLocation = S->getAtTryLoc();
1934 ConvertSourceLocationToLineDirective(TryLocation, buf);
1935
1936 if (finalStmt) {
1937 if (noCatch)
1938 buf += "{ id volatile _rethrow = 0;\n";
1939 else {
1940 buf += "{ id volatile _rethrow = 0;\ntry {\n";
1941 }
1942 }
1943 // Get the start location and compute the semi location.
1944 SourceLocation startLoc = S->getBeginLoc();
1945 const char *startBuf = SM->getCharacterData(startLoc);
1946
1947 assert((*startBuf == '@') && "bogus @try location")(((*startBuf == '@') && "bogus @try location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @try location\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1947, __PRETTY_FUNCTION__))
;
1948 if (finalStmt)
1949 ReplaceText(startLoc, 1, buf);
1950 else
1951 // @try -> try
1952 ReplaceText(startLoc, 1, "");
1953
1954 for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
1955 ObjCAtCatchStmt *Catch = S->getCatchStmt(I);
1956 VarDecl *catchDecl = Catch->getCatchParamDecl();
1957
1958 startLoc = Catch->getBeginLoc();
1959 bool AtRemoved = false;
1960 if (catchDecl) {
1961 QualType t = catchDecl->getType();
1962 if (const ObjCObjectPointerType *Ptr = t->getAs<ObjCObjectPointerType>()) {
1963 // Should be a pointer to a class.
1964 ObjCInterfaceDecl *IDecl = Ptr->getObjectType()->getInterface();
1965 if (IDecl) {
1966 std::string Result;
1967 ConvertSourceLocationToLineDirective(Catch->getBeginLoc(), Result);
1968
1969 startBuf = SM->getCharacterData(startLoc);
1970 assert((*startBuf == '@') && "bogus @catch location")(((*startBuf == '@') && "bogus @catch location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @catch location\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 1970, __PRETTY_FUNCTION__))
;
1971 SourceLocation rParenLoc = Catch->getRParenLoc();
1972 const char *rParenBuf = SM->getCharacterData(rParenLoc);
1973
1974 // _objc_exc_Foo *_e as argument to catch.
1975 Result += "catch (_objc_exc_"; Result += IDecl->getNameAsString();
1976 Result += " *_"; Result += catchDecl->getNameAsString();
1977 Result += ")";
1978 ReplaceText(startLoc, rParenBuf-startBuf+1, Result);
1979 // Foo *e = (Foo *)_e;
1980 Result.clear();
1981 Result = "{ ";
1982 Result += IDecl->getNameAsString();
1983 Result += " *"; Result += catchDecl->getNameAsString();
1984 Result += " = ("; Result += IDecl->getNameAsString(); Result += "*)";
1985 Result += "_"; Result += catchDecl->getNameAsString();
1986
1987 Result += "; ";
1988 SourceLocation lBraceLoc = Catch->getCatchBody()->getBeginLoc();
1989 ReplaceText(lBraceLoc, 1, Result);
1990 AtRemoved = true;
1991 }
1992 }
1993 }
1994 if (!AtRemoved)
1995 // @catch -> catch
1996 ReplaceText(startLoc, 1, "");
1997
1998 }
1999 if (finalStmt) {
2000 buf.clear();
2001 SourceLocation FinallyLoc = finalStmt->getBeginLoc();
2002
2003 if (noCatch) {
2004 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2005 buf += "catch (id e) {_rethrow = e;}\n";
2006 }
2007 else {
2008 buf += "}\n";
2009 ConvertSourceLocationToLineDirective(FinallyLoc, buf);
2010 buf += "catch (id e) {_rethrow = e;}\n";
2011 }
2012
2013 SourceLocation startFinalLoc = finalStmt->getBeginLoc();
2014 ReplaceText(startFinalLoc, 8, buf);
2015 Stmt *body = finalStmt->getFinallyBody();
2016 SourceLocation startFinalBodyLoc = body->getBeginLoc();
2017 buf.clear();
2018 Write_RethrowObject(buf);
2019 ReplaceText(startFinalBodyLoc, 1, buf);
2020
2021 SourceLocation endFinalBodyLoc = body->getEndLoc();
2022 ReplaceText(endFinalBodyLoc, 1, "}\n}");
2023 // Now check for any return/continue/go statements within the @try.
2024 WarnAboutReturnGotoStmts(S->getTryBody());
2025 }
2026
2027 return nullptr;
2028}
2029
2030// This can't be done with ReplaceStmt(S, ThrowExpr), since
2031// the throw expression is typically a message expression that's already
2032// been rewritten! (which implies the SourceLocation's are invalid).
2033Stmt *RewriteModernObjC::RewriteObjCThrowStmt(ObjCAtThrowStmt *S) {
2034 // Get the start location and compute the semi location.
2035 SourceLocation startLoc = S->getBeginLoc();
2036 const char *startBuf = SM->getCharacterData(startLoc);
2037
2038 assert((*startBuf == '@') && "bogus @throw location")(((*startBuf == '@') && "bogus @throw location") ? static_cast
<void> (0) : __assert_fail ("(*startBuf == '@') && \"bogus @throw location\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2038, __PRETTY_FUNCTION__))
;
2039
2040 std::string buf;
2041 /* void objc_exception_throw(id) __attribute__((noreturn)); */
2042 if (S->getThrowExpr())
2043 buf = "objc_exception_throw(";
2044 else
2045 buf = "throw";
2046
2047 // handle "@ throw" correctly.
2048 const char *wBuf = strchr(startBuf, 'w');
2049 assert((*wBuf == 'w') && "@throw: can't find 'w'")(((*wBuf == 'w') && "@throw: can't find 'w'") ? static_cast
<void> (0) : __assert_fail ("(*wBuf == 'w') && \"@throw: can't find 'w'\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2049, __PRETTY_FUNCTION__))
;
2050 ReplaceText(startLoc, wBuf-startBuf+1, buf);
2051
2052 SourceLocation endLoc = S->getEndLoc();
2053 const char *endBuf = SM->getCharacterData(endLoc);
2054 const char *semiBuf = strchr(endBuf, ';');
2055 assert((*semiBuf == ';') && "@throw: can't find ';'")(((*semiBuf == ';') && "@throw: can't find ';'") ? static_cast
<void> (0) : __assert_fail ("(*semiBuf == ';') && \"@throw: can't find ';'\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2055, __PRETTY_FUNCTION__))
;
2056 SourceLocation semiLoc = startLoc.getLocWithOffset(semiBuf-startBuf);
2057 if (S->getThrowExpr())
2058 ReplaceText(semiLoc, 1, ");");
2059 return nullptr;
2060}
2061
2062Stmt *RewriteModernObjC::RewriteAtEncode(ObjCEncodeExpr *Exp) {
2063 // Create a new string expression.
2064 std::string StrEncoding;
2065 Context->getObjCEncodingForType(Exp->getEncodedType(), StrEncoding);
2066 Expr *Replacement = getStringLiteral(StrEncoding);
2067 ReplaceStmt(Exp, Replacement);
2068
2069 // Replace this subexpr in the parent.
2070 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2071 return Replacement;
2072}
2073
2074Stmt *RewriteModernObjC::RewriteAtSelector(ObjCSelectorExpr *Exp) {
2075 if (!SelGetUidFunctionDecl)
2076 SynthSelGetUidFunctionDecl();
2077 assert(SelGetUidFunctionDecl && "Can't find sel_registerName() decl")((SelGetUidFunctionDecl && "Can't find sel_registerName() decl"
) ? static_cast<void> (0) : __assert_fail ("SelGetUidFunctionDecl && \"Can't find sel_registerName() decl\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2077, __PRETTY_FUNCTION__))
;
2078 // Create a call to sel_registerName("selName").
2079 SmallVector<Expr*, 8> SelExprs;
2080 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
2081 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2082 SelExprs);
2083 ReplaceStmt(Exp, SelExp);
2084 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2085 return SelExp;
2086}
2087
2088CallExpr *
2089RewriteModernObjC::SynthesizeCallToFunctionDecl(FunctionDecl *FD,
2090 ArrayRef<Expr *> Args,
2091 SourceLocation StartLoc,
2092 SourceLocation EndLoc) {
2093 // Get the type, we will need to reference it in a couple spots.
2094 QualType msgSendType = FD->getType();
2095
2096 // Create a reference to the objc_msgSend() declaration.
2097 DeclRefExpr *DRE = new (Context) DeclRefExpr(*Context, FD, false, msgSendType,
2098 VK_LValue, SourceLocation());
2099
2100 // Now, we cast the reference to a pointer to the objc_msgSend type.
2101 QualType pToFunc = Context->getPointerType(msgSendType);
2102 ImplicitCastExpr *ICE =
2103 ImplicitCastExpr::Create(*Context, pToFunc, CK_FunctionToPointerDecay,
2104 DRE, nullptr, VK_RValue);
2105
2106 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2107
2108 CallExpr *Exp = CallExpr::Create(
2109 *Context, ICE, Args, FT->getCallResultType(*Context), VK_RValue, EndLoc);
2110 return Exp;
2111}
2112
2113static bool scanForProtocolRefs(const char *startBuf, const char *endBuf,
2114 const char *&startRef, const char *&endRef) {
2115 while (startBuf < endBuf) {
2116 if (*startBuf == '<')
2117 startRef = startBuf; // mark the start.
2118 if (*startBuf == '>') {
2119 if (startRef && *startRef == '<') {
2120 endRef = startBuf; // mark the end.
2121 return true;
2122 }
2123 return false;
2124 }
2125 startBuf++;
2126 }
2127 return false;
2128}
2129
2130static void scanToNextArgument(const char *&argRef) {
2131 int angle = 0;
2132 while (*argRef != ')' && (*argRef != ',' || angle > 0)) {
2133 if (*argRef == '<')
2134 angle++;
2135 else if (*argRef == '>')
2136 angle--;
2137 argRef++;
2138 }
2139 assert(angle == 0 && "scanToNextArgument - bad protocol type syntax")((angle == 0 && "scanToNextArgument - bad protocol type syntax"
) ? static_cast<void> (0) : __assert_fail ("angle == 0 && \"scanToNextArgument - bad protocol type syntax\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2139, __PRETTY_FUNCTION__))
;
2140}
2141
2142bool RewriteModernObjC::needToScanForQualifiers(QualType T) {
2143 if (T->isObjCQualifiedIdType())
2144 return true;
2145 if (const PointerType *PT = T->getAs<PointerType>()) {
2146 if (PT->getPointeeType()->isObjCQualifiedIdType())
2147 return true;
2148 }
2149 if (T->isObjCObjectPointerType()) {
2150 T = T->getPointeeType();
2151 return T->isObjCQualifiedInterfaceType();
2152 }
2153 if (T->isArrayType()) {
2154 QualType ElemTy = Context->getBaseElementType(T);
2155 return needToScanForQualifiers(ElemTy);
2156 }
2157 return false;
2158}
2159
2160void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Expr *E) {
2161 QualType Type = E->getType();
2162 if (needToScanForQualifiers(Type)) {
2163 SourceLocation Loc, EndLoc;
2164
2165 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E)) {
2166 Loc = ECE->getLParenLoc();
2167 EndLoc = ECE->getRParenLoc();
2168 } else {
2169 Loc = E->getBeginLoc();
2170 EndLoc = E->getEndLoc();
2171 }
2172 // This will defend against trying to rewrite synthesized expressions.
2173 if (Loc.isInvalid() || EndLoc.isInvalid())
2174 return;
2175
2176 const char *startBuf = SM->getCharacterData(Loc);
2177 const char *endBuf = SM->getCharacterData(EndLoc);
2178 const char *startRef = nullptr, *endRef = nullptr;
2179 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2180 // Get the locations of the startRef, endRef.
2181 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-startBuf);
2182 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-startBuf+1);
2183 // Comment out the protocol references.
2184 InsertText(LessLoc, "/*");
2185 InsertText(GreaterLoc, "*/");
2186 }
2187 }
2188}
2189
2190void RewriteModernObjC::RewriteObjCQualifiedInterfaceTypes(Decl *Dcl) {
2191 SourceLocation Loc;
2192 QualType Type;
2193 const FunctionProtoType *proto = nullptr;
2194 if (VarDecl *VD = dyn_cast<VarDecl>(Dcl)) {
2195 Loc = VD->getLocation();
2196 Type = VD->getType();
2197 }
2198 else if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Dcl)) {
2199 Loc = FD->getLocation();
2200 // Check for ObjC 'id' and class types that have been adorned with protocol
2201 // information (id<p>, C<p>*). The protocol references need to be rewritten!
2202 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2203 assert(funcType && "missing function type")((funcType && "missing function type") ? static_cast<
void> (0) : __assert_fail ("funcType && \"missing function type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2203, __PRETTY_FUNCTION__))
;
2204 proto = dyn_cast<FunctionProtoType>(funcType);
2205 if (!proto)
2206 return;
2207 Type = proto->getReturnType();
2208 }
2209 else if (FieldDecl *FD = dyn_cast<FieldDecl>(Dcl)) {
2210 Loc = FD->getLocation();
2211 Type = FD->getType();
2212 }
2213 else if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(Dcl)) {
2214 Loc = TD->getLocation();
2215 Type = TD->getUnderlyingType();
2216 }
2217 else
2218 return;
2219
2220 if (needToScanForQualifiers(Type)) {
2221 // Since types are unique, we need to scan the buffer.
2222
2223 const char *endBuf = SM->getCharacterData(Loc);
2224 const char *startBuf = endBuf;
2225 while (*startBuf != ';' && *startBuf != '<' && startBuf != MainFileStart)
2226 startBuf--; // scan backward (from the decl location) for return type.
2227 const char *startRef = nullptr, *endRef = nullptr;
2228 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2229 // Get the locations of the startRef, endRef.
2230 SourceLocation LessLoc = Loc.getLocWithOffset(startRef-endBuf);
2231 SourceLocation GreaterLoc = Loc.getLocWithOffset(endRef-endBuf+1);
2232 // Comment out the protocol references.
2233 InsertText(LessLoc, "/*");
2234 InsertText(GreaterLoc, "*/");
2235 }
2236 }
2237 if (!proto)
2238 return; // most likely, was a variable
2239 // Now check arguments.
2240 const char *startBuf = SM->getCharacterData(Loc);
2241 const char *startFuncBuf = startBuf;
2242 for (unsigned i = 0; i < proto->getNumParams(); i++) {
2243 if (needToScanForQualifiers(proto->getParamType(i))) {
2244 // Since types are unique, we need to scan the buffer.
2245
2246 const char *endBuf = startBuf;
2247 // scan forward (from the decl location) for argument types.
2248 scanToNextArgument(endBuf);
2249 const char *startRef = nullptr, *endRef = nullptr;
2250 if (scanForProtocolRefs(startBuf, endBuf, startRef, endRef)) {
2251 // Get the locations of the startRef, endRef.
2252 SourceLocation LessLoc =
2253 Loc.getLocWithOffset(startRef-startFuncBuf);
2254 SourceLocation GreaterLoc =
2255 Loc.getLocWithOffset(endRef-startFuncBuf+1);
2256 // Comment out the protocol references.
2257 InsertText(LessLoc, "/*");
2258 InsertText(GreaterLoc, "*/");
2259 }
2260 startBuf = ++endBuf;
2261 }
2262 else {
2263 // If the function name is derived from a macro expansion, then the
2264 // argument buffer will not follow the name. Need to speak with Chris.
2265 while (*startBuf && *startBuf != ')' && *startBuf != ',')
2266 startBuf++; // scan forward (from the decl location) for argument types.
2267 startBuf++;
2268 }
2269 }
2270}
2271
2272void RewriteModernObjC::RewriteTypeOfDecl(VarDecl *ND) {
2273 QualType QT = ND->getType();
2274 const Type* TypePtr = QT->getAs<Type>();
2275 if (!isa<TypeOfExprType>(TypePtr))
2276 return;
2277 while (isa<TypeOfExprType>(TypePtr)) {
2278 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
2279 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
2280 TypePtr = QT->getAs<Type>();
2281 }
2282 // FIXME. This will not work for multiple declarators; as in:
2283 // __typeof__(a) b,c,d;
2284 std::string TypeAsString(QT.getAsString(Context->getPrintingPolicy()));
2285 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
2286 const char *startBuf = SM->getCharacterData(DeclLoc);
2287 if (ND->getInit()) {
2288 std::string Name(ND->getNameAsString());
2289 TypeAsString += " " + Name + " = ";
2290 Expr *E = ND->getInit();
2291 SourceLocation startLoc;
2292 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
2293 startLoc = ECE->getLParenLoc();
2294 else
2295 startLoc = E->getBeginLoc();
2296 startLoc = SM->getExpansionLoc(startLoc);
2297 const char *endBuf = SM->getCharacterData(startLoc);
2298 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2299 }
2300 else {
2301 SourceLocation X = ND->getEndLoc();
2302 X = SM->getExpansionLoc(X);
2303 const char *endBuf = SM->getCharacterData(X);
2304 ReplaceText(DeclLoc, endBuf-startBuf-1, TypeAsString);
2305 }
2306}
2307
2308// SynthSelGetUidFunctionDecl - SEL sel_registerName(const char *str);
2309void RewriteModernObjC::SynthSelGetUidFunctionDecl() {
2310 IdentifierInfo *SelGetUidIdent = &Context->Idents.get("sel_registerName");
2311 SmallVector<QualType, 16> ArgTys;
2312 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2313 QualType getFuncType =
2314 getSimpleFunctionType(Context->getObjCSelType(), ArgTys);
2315 SelGetUidFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2316 SourceLocation(),
2317 SourceLocation(),
2318 SelGetUidIdent, getFuncType,
2319 nullptr, SC_Extern);
2320}
2321
2322void RewriteModernObjC::RewriteFunctionDecl(FunctionDecl *FD) {
2323 // declared in <objc/objc.h>
2324 if (FD->getIdentifier() &&
2325 FD->getName() == "sel_registerName") {
2326 SelGetUidFunctionDecl = FD;
2327 return;
2328 }
2329 RewriteObjCQualifiedInterfaceTypes(FD);
2330}
2331
2332void RewriteModernObjC::RewriteBlockPointerType(std::string& Str, QualType Type) {
2333 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2334 const char *argPtr = TypeString.c_str();
2335 if (!strchr(argPtr, '^')) {
2336 Str += TypeString;
2337 return;
2338 }
2339 while (*argPtr) {
2340 Str += (*argPtr == '^' ? '*' : *argPtr);
2341 argPtr++;
2342 }
2343}
2344
2345// FIXME. Consolidate this routine with RewriteBlockPointerType.
2346void RewriteModernObjC::RewriteBlockPointerTypeVariable(std::string& Str,
2347 ValueDecl *VD) {
2348 QualType Type = VD->getType();
2349 std::string TypeString(Type.getAsString(Context->getPrintingPolicy()));
2350 const char *argPtr = TypeString.c_str();
2351 int paren = 0;
2352 while (*argPtr) {
2353 switch (*argPtr) {
2354 case '(':
2355 Str += *argPtr;
2356 paren++;
2357 break;
2358 case ')':
2359 Str += *argPtr;
2360 paren--;
2361 break;
2362 case '^':
2363 Str += '*';
2364 if (paren == 1)
2365 Str += VD->getNameAsString();
2366 break;
2367 default:
2368 Str += *argPtr;
2369 break;
2370 }
2371 argPtr++;
2372 }
2373}
2374
2375void RewriteModernObjC::RewriteBlockLiteralFunctionDecl(FunctionDecl *FD) {
2376 SourceLocation FunLocStart = FD->getTypeSpecStartLoc();
2377 const FunctionType *funcType = FD->getType()->getAs<FunctionType>();
2378 const FunctionProtoType *proto = dyn_cast<FunctionProtoType>(funcType);
2379 if (!proto)
2380 return;
2381 QualType Type = proto->getReturnType();
2382 std::string FdStr = Type.getAsString(Context->getPrintingPolicy());
2383 FdStr += " ";
2384 FdStr += FD->getName();
2385 FdStr += "(";
2386 unsigned numArgs = proto->getNumParams();
2387 for (unsigned i = 0; i < numArgs; i++) {
2388 QualType ArgType = proto->getParamType(i);
2389 RewriteBlockPointerType(FdStr, ArgType);
2390 if (i+1 < numArgs)
2391 FdStr += ", ";
2392 }
2393 if (FD->isVariadic()) {
2394 FdStr += (numArgs > 0) ? ", ...);\n" : "...);\n";
2395 }
2396 else
2397 FdStr += ");\n";
2398 InsertText(FunLocStart, FdStr);
2399}
2400
2401// SynthSuperConstructorFunctionDecl - id __rw_objc_super(id obj, id super);
2402void RewriteModernObjC::SynthSuperConstructorFunctionDecl() {
2403 if (SuperConstructorFunctionDecl)
2404 return;
2405 IdentifierInfo *msgSendIdent = &Context->Idents.get("__rw_objc_super");
2406 SmallVector<QualType, 16> ArgTys;
2407 QualType argT = Context->getObjCIdType();
2408 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2408, __PRETTY_FUNCTION__))
;
2409 ArgTys.push_back(argT);
2410 ArgTys.push_back(argT);
2411 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2412 ArgTys);
2413 SuperConstructorFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2414 SourceLocation(),
2415 SourceLocation(),
2416 msgSendIdent, msgSendType,
2417 nullptr, SC_Extern);
2418}
2419
2420// SynthMsgSendFunctionDecl - id objc_msgSend(id self, SEL op, ...);
2421void RewriteModernObjC::SynthMsgSendFunctionDecl() {
2422 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend");
2423 SmallVector<QualType, 16> ArgTys;
2424 QualType argT = Context->getObjCIdType();
2425 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2425, __PRETTY_FUNCTION__))
;
2426 ArgTys.push_back(argT);
2427 argT = Context->getObjCSelType();
2428 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2428, __PRETTY_FUNCTION__))
;
2429 ArgTys.push_back(argT);
2430 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2431 ArgTys, /*variadic=*/true);
2432 MsgSendFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2433 SourceLocation(),
2434 SourceLocation(),
2435 msgSendIdent, msgSendType, nullptr,
2436 SC_Extern);
2437}
2438
2439// SynthMsgSendSuperFunctionDecl - id objc_msgSendSuper(void);
2440void RewriteModernObjC::SynthMsgSendSuperFunctionDecl() {
2441 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSendSuper");
2442 SmallVector<QualType, 2> ArgTys;
2443 ArgTys.push_back(Context->VoidTy);
2444 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2445 ArgTys, /*variadic=*/true);
2446 MsgSendSuperFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2447 SourceLocation(),
2448 SourceLocation(),
2449 msgSendIdent, msgSendType,
2450 nullptr, SC_Extern);
2451}
2452
2453// SynthMsgSendStretFunctionDecl - id objc_msgSend_stret(id self, SEL op, ...);
2454void RewriteModernObjC::SynthMsgSendStretFunctionDecl() {
2455 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_stret");
2456 SmallVector<QualType, 16> ArgTys;
2457 QualType argT = Context->getObjCIdType();
2458 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2458, __PRETTY_FUNCTION__))
;
2459 ArgTys.push_back(argT);
2460 argT = Context->getObjCSelType();
2461 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2461, __PRETTY_FUNCTION__))
;
2462 ArgTys.push_back(argT);
2463 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2464 ArgTys, /*variadic=*/true);
2465 MsgSendStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2466 SourceLocation(),
2467 SourceLocation(),
2468 msgSendIdent, msgSendType,
2469 nullptr, SC_Extern);
2470}
2471
2472// SynthMsgSendSuperStretFunctionDecl -
2473// id objc_msgSendSuper_stret(void);
2474void RewriteModernObjC::SynthMsgSendSuperStretFunctionDecl() {
2475 IdentifierInfo *msgSendIdent =
2476 &Context->Idents.get("objc_msgSendSuper_stret");
2477 SmallVector<QualType, 2> ArgTys;
2478 ArgTys.push_back(Context->VoidTy);
2479 QualType msgSendType = getSimpleFunctionType(Context->getObjCIdType(),
2480 ArgTys, /*variadic=*/true);
2481 MsgSendSuperStretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2482 SourceLocation(),
2483 SourceLocation(),
2484 msgSendIdent,
2485 msgSendType, nullptr,
2486 SC_Extern);
2487}
2488
2489// SynthMsgSendFpretFunctionDecl - double objc_msgSend_fpret(id self, SEL op, ...);
2490void RewriteModernObjC::SynthMsgSendFpretFunctionDecl() {
2491 IdentifierInfo *msgSendIdent = &Context->Idents.get("objc_msgSend_fpret");
2492 SmallVector<QualType, 16> ArgTys;
2493 QualType argT = Context->getObjCIdType();
2494 assert(!argT.isNull() && "Can't find 'id' type")((!argT.isNull() && "Can't find 'id' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'id' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2494, __PRETTY_FUNCTION__))
;
2495 ArgTys.push_back(argT);
2496 argT = Context->getObjCSelType();
2497 assert(!argT.isNull() && "Can't find 'SEL' type")((!argT.isNull() && "Can't find 'SEL' type") ? static_cast
<void> (0) : __assert_fail ("!argT.isNull() && \"Can't find 'SEL' type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2497, __PRETTY_FUNCTION__))
;
2498 ArgTys.push_back(argT);
2499 QualType msgSendType = getSimpleFunctionType(Context->DoubleTy,
2500 ArgTys, /*variadic=*/true);
2501 MsgSendFpretFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2502 SourceLocation(),
2503 SourceLocation(),
2504 msgSendIdent, msgSendType,
2505 nullptr, SC_Extern);
2506}
2507
2508// SynthGetClassFunctionDecl - Class objc_getClass(const char *name);
2509void RewriteModernObjC::SynthGetClassFunctionDecl() {
2510 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getClass");
2511 SmallVector<QualType, 16> ArgTys;
2512 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2513 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2514 ArgTys);
2515 GetClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2516 SourceLocation(),
2517 SourceLocation(),
2518 getClassIdent, getClassType,
2519 nullptr, SC_Extern);
2520}
2521
2522// SynthGetSuperClassFunctionDecl - Class class_getSuperclass(Class cls);
2523void RewriteModernObjC::SynthGetSuperClassFunctionDecl() {
2524 IdentifierInfo *getSuperClassIdent =
2525 &Context->Idents.get("class_getSuperclass");
2526 SmallVector<QualType, 16> ArgTys;
2527 ArgTys.push_back(Context->getObjCClassType());
2528 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2529 ArgTys);
2530 GetSuperClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2531 SourceLocation(),
2532 SourceLocation(),
2533 getSuperClassIdent,
2534 getClassType, nullptr,
2535 SC_Extern);
2536}
2537
2538// SynthGetMetaClassFunctionDecl - Class objc_getMetaClass(const char *name);
2539void RewriteModernObjC::SynthGetMetaClassFunctionDecl() {
2540 IdentifierInfo *getClassIdent = &Context->Idents.get("objc_getMetaClass");
2541 SmallVector<QualType, 16> ArgTys;
2542 ArgTys.push_back(Context->getPointerType(Context->CharTy.withConst()));
2543 QualType getClassType = getSimpleFunctionType(Context->getObjCClassType(),
2544 ArgTys);
2545 GetMetaClassFunctionDecl = FunctionDecl::Create(*Context, TUDecl,
2546 SourceLocation(),
2547 SourceLocation(),
2548 getClassIdent, getClassType,
2549 nullptr, SC_Extern);
2550}
2551
2552Stmt *RewriteModernObjC::RewriteObjCStringLiteral(ObjCStringLiteral *Exp) {
2553 assert (Exp != nullptr && "Expected non-null ObjCStringLiteral")((Exp != nullptr && "Expected non-null ObjCStringLiteral"
) ? static_cast<void> (0) : __assert_fail ("Exp != nullptr && \"Expected non-null ObjCStringLiteral\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 2553, __PRETTY_FUNCTION__))
;
2554 QualType strType = getConstantStringStructType();
2555
2556 std::string S = "__NSConstantStringImpl_";
2557
2558 std::string tmpName = InFileName;
2559 unsigned i;
2560 for (i=0; i < tmpName.length(); i++) {
2561 char c = tmpName.at(i);
2562 // replace any non-alphanumeric characters with '_'.
2563 if (!isAlphanumeric(c))
2564 tmpName[i] = '_';
2565 }
2566 S += tmpName;
2567 S += "_";
2568 S += utostr(NumObjCStringLiterals++);
2569
2570 Preamble += "static __NSConstantStringImpl " + S;
2571 Preamble += " __attribute__ ((section (\"__DATA, __cfstring\"))) = {__CFConstantStringClassReference,";
2572 Preamble += "0x000007c8,"; // utf8_str
2573 // The pretty printer for StringLiteral handles escape characters properly.
2574 std::string prettyBufS;
2575 llvm::raw_string_ostream prettyBuf(prettyBufS);
2576 Exp->getString()->printPretty(prettyBuf, nullptr, PrintingPolicy(LangOpts));
2577 Preamble += prettyBuf.str();
2578 Preamble += ",";
2579 Preamble += utostr(Exp->getString()->getByteLength()) + "};\n";
2580
2581 VarDecl *NewVD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
2582 SourceLocation(), &Context->Idents.get(S),
2583 strType, nullptr, SC_Static);
2584 DeclRefExpr *DRE = new (Context)
2585 DeclRefExpr(*Context, NewVD, false, strType, VK_LValue, SourceLocation());
2586 Expr *Unop = new (Context)
2587 UnaryOperator(DRE, UO_AddrOf, Context->getPointerType(DRE->getType()),
2588 VK_RValue, OK_Ordinary, SourceLocation(), false);
2589 // cast to NSConstantString *
2590 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Exp->getType(),
2591 CK_CPointerToObjCPointerCast, Unop);
2592 ReplaceStmt(Exp, cast);
2593 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
2594 return cast;
2595}
2596
2597Stmt *RewriteModernObjC::RewriteObjCBoolLiteralExpr(ObjCBoolLiteralExpr *Exp) {
2598 unsigned IntSize =
2599 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
2600
2601 Expr *FlagExp = IntegerLiteral::Create(*Context,
2602 llvm::APInt(IntSize, Exp->getValue()),
2603 Context->IntTy, Exp->getLocation());
2604 CastExpr *cast = NoTypeInfoCStyleCastExpr(Context, Context->ObjCBuiltinBoolTy,
2605 CK_BitCast, FlagExp);
2606 ParenExpr *PE = new (Context) ParenExpr(Exp->getLocation(), Exp->getExprLoc(),
2607 cast);
2608 ReplaceStmt(Exp, PE);
2609 return PE;
2610}
2611
2612Stmt *RewriteModernObjC::RewriteObjCBoxedExpr(ObjCBoxedExpr *Exp) {
2613 // synthesize declaration of helper functions needed in this routine.
2614 if (!SelGetUidFunctionDecl)
2615 SynthSelGetUidFunctionDecl();
2616 // use objc_msgSend() for all.
2617 if (!MsgSendFunctionDecl)
2618 SynthMsgSendFunctionDecl();
2619 if (!GetClassFunctionDecl)
2620 SynthGetClassFunctionDecl();
2621
2622 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2623 SourceLocation StartLoc = Exp->getBeginLoc();
2624 SourceLocation EndLoc = Exp->getEndLoc();
2625
2626 // Synthesize a call to objc_msgSend().
2627 SmallVector<Expr*, 4> MsgExprs;
2628 SmallVector<Expr*, 4> ClsExprs;
2629
2630 // Create a call to objc_getClass("<BoxingClass>"). It will be the 1st argument.
2631 ObjCMethodDecl *BoxingMethod = Exp->getBoxingMethod();
2632 ObjCInterfaceDecl *BoxingClass = BoxingMethod->getClassInterface();
2633
2634 IdentifierInfo *clsName = BoxingClass->getIdentifier();
2635 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2636 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2637 StartLoc, EndLoc);
2638 MsgExprs.push_back(Cls);
2639
2640 // Create a call to sel_registerName("<BoxingMethod>:"), etc.
2641 // it will be the 2nd argument.
2642 SmallVector<Expr*, 4> SelExprs;
2643 SelExprs.push_back(
2644 getStringLiteral(BoxingMethod->getSelector().getAsString()));
2645 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2646 SelExprs, StartLoc, EndLoc);
2647 MsgExprs.push_back(SelExp);
2648
2649 // User provided sub-expression is the 3rd, and last, argument.
2650 Expr *subExpr = Exp->getSubExpr();
2651 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(subExpr)) {
2652 QualType type = ICE->getType();
2653 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
2654 CastKind CK = CK_BitCast;
2655 if (SubExpr->getType()->isIntegralType(*Context) && type->isBooleanType())
2656 CK = CK_IntegralToBoolean;
2657 subExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, subExpr);
2658 }
2659 MsgExprs.push_back(subExpr);
2660
2661 SmallVector<QualType, 4> ArgTypes;
2662 ArgTypes.push_back(Context->getObjCClassType());
2663 ArgTypes.push_back(Context->getObjCSelType());
2664 for (const auto PI : BoxingMethod->parameters())
2665 ArgTypes.push_back(PI->getType());
2666
2667 QualType returnType = Exp->getType();
2668 // Get the type, we will need to reference it in a couple spots.
2669 QualType msgSendType = MsgSendFlavor->getType();
2670
2671 // Create a reference to the objc_msgSend() declaration.
2672 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2673 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2674
2675 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2676 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2677
2678 // Now do the "normal" pointer to function cast.
2679 QualType castType =
2680 getSimpleFunctionType(returnType, ArgTypes, BoxingMethod->isVariadic());
2681 castType = Context->getPointerType(castType);
2682 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2683 cast);
2684
2685 // Don't forget the parens to enforce the proper binding.
2686 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2687
2688 const FunctionType *FT = msgSendType->getAs<FunctionType>();
2689 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2690 VK_RValue, EndLoc);
2691 ReplaceStmt(Exp, CE);
2692 return CE;
2693}
2694
2695Stmt *RewriteModernObjC::RewriteObjCArrayLiteralExpr(ObjCArrayLiteral *Exp) {
2696 // synthesize declaration of helper functions needed in this routine.
2697 if (!SelGetUidFunctionDecl)
2698 SynthSelGetUidFunctionDecl();
2699 // use objc_msgSend() for all.
2700 if (!MsgSendFunctionDecl)
2701 SynthMsgSendFunctionDecl();
2702 if (!GetClassFunctionDecl)
2703 SynthGetClassFunctionDecl();
2704
2705 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2706 SourceLocation StartLoc = Exp->getBeginLoc();
2707 SourceLocation EndLoc = Exp->getEndLoc();
2708
2709 // Build the expression: __NSContainer_literal(int, ...).arr
2710 QualType IntQT = Context->IntTy;
2711 QualType NSArrayFType =
2712 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2713 std::string NSArrayFName("__NSContainer_literal");
2714 FunctionDecl *NSArrayFD = SynthBlockInitFunctionDecl(NSArrayFName);
2715 DeclRefExpr *NSArrayDRE = new (Context) DeclRefExpr(
2716 *Context, NSArrayFD, false, NSArrayFType, VK_RValue, SourceLocation());
2717
2718 SmallVector<Expr*, 16> InitExprs;
2719 unsigned NumElements = Exp->getNumElements();
2720 unsigned UnsignedIntSize =
2721 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2722 Expr *count = IntegerLiteral::Create(*Context,
2723 llvm::APInt(UnsignedIntSize, NumElements),
2724 Context->UnsignedIntTy, SourceLocation());
2725 InitExprs.push_back(count);
2726 for (unsigned i = 0; i < NumElements; i++)
2727 InitExprs.push_back(Exp->getElement(i));
2728 Expr *NSArrayCallExpr =
2729 CallExpr::Create(*Context, NSArrayDRE, InitExprs, NSArrayFType, VK_LValue,
2730 SourceLocation());
2731
2732 FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2733 SourceLocation(),
2734 &Context->Idents.get("arr"),
2735 Context->getPointerType(Context->VoidPtrTy),
2736 nullptr, /*BitWidth=*/nullptr,
2737 /*Mutable=*/true, ICIS_NoInit);
2738 MemberExpr *ArrayLiteralME =
2739 MemberExpr::CreateImplicit(*Context, NSArrayCallExpr, false, ARRFD,
2740 ARRFD->getType(), VK_LValue, OK_Ordinary);
2741 QualType ConstIdT = Context->getObjCIdType().withConst();
2742 CStyleCastExpr * ArrayLiteralObjects =
2743 NoTypeInfoCStyleCastExpr(Context,
2744 Context->getPointerType(ConstIdT),
2745 CK_BitCast,
2746 ArrayLiteralME);
2747
2748 // Synthesize a call to objc_msgSend().
2749 SmallVector<Expr*, 32> MsgExprs;
2750 SmallVector<Expr*, 4> ClsExprs;
2751 QualType expType = Exp->getType();
2752
2753 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2754 ObjCInterfaceDecl *Class =
2755 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2756
2757 IdentifierInfo *clsName = Class->getIdentifier();
2758 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2759 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2760 StartLoc, EndLoc);
2761 MsgExprs.push_back(Cls);
2762
2763 // Create a call to sel_registerName("arrayWithObjects:count:").
2764 // it will be the 2nd argument.
2765 SmallVector<Expr*, 4> SelExprs;
2766 ObjCMethodDecl *ArrayMethod = Exp->getArrayWithObjectsMethod();
2767 SelExprs.push_back(
2768 getStringLiteral(ArrayMethod->getSelector().getAsString()));
2769 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2770 SelExprs, StartLoc, EndLoc);
2771 MsgExprs.push_back(SelExp);
2772
2773 // (const id [])objects
2774 MsgExprs.push_back(ArrayLiteralObjects);
2775
2776 // (NSUInteger)cnt
2777 Expr *cnt = IntegerLiteral::Create(*Context,
2778 llvm::APInt(UnsignedIntSize, NumElements),
2779 Context->UnsignedIntTy, SourceLocation());
2780 MsgExprs.push_back(cnt);
2781
2782 SmallVector<QualType, 4> ArgTypes;
2783 ArgTypes.push_back(Context->getObjCClassType());
2784 ArgTypes.push_back(Context->getObjCSelType());
2785 for (const auto *PI : ArrayMethod->parameters())
2786 ArgTypes.push_back(PI->getType());
2787
2788 QualType returnType = Exp->getType();
2789 // Get the type, we will need to reference it in a couple spots.
2790 QualType msgSendType = MsgSendFlavor->getType();
2791
2792 // Create a reference to the objc_msgSend() declaration.
2793 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2794 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2795
2796 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2797 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2798
2799 // Now do the "normal" pointer to function cast.
2800 QualType castType =
2801 getSimpleFunctionType(returnType, ArgTypes, ArrayMethod->isVariadic());
2802 castType = Context->getPointerType(castType);
2803 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2804 cast);
2805
2806 // Don't forget the parens to enforce the proper binding.
2807 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2808
2809 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2810 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2811 VK_RValue, EndLoc);
2812 ReplaceStmt(Exp, CE);
2813 return CE;
2814}
2815
2816Stmt *RewriteModernObjC::RewriteObjCDictionaryLiteralExpr(ObjCDictionaryLiteral *Exp) {
2817 // synthesize declaration of helper functions needed in this routine.
2818 if (!SelGetUidFunctionDecl)
2819 SynthSelGetUidFunctionDecl();
2820 // use objc_msgSend() for all.
2821 if (!MsgSendFunctionDecl)
2822 SynthMsgSendFunctionDecl();
2823 if (!GetClassFunctionDecl)
2824 SynthGetClassFunctionDecl();
2825
2826 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
2827 SourceLocation StartLoc = Exp->getBeginLoc();
2828 SourceLocation EndLoc = Exp->getEndLoc();
2829
2830 // Build the expression: __NSContainer_literal(int, ...).arr
2831 QualType IntQT = Context->IntTy;
2832 QualType NSDictFType =
2833 getSimpleFunctionType(Context->VoidTy, IntQT, true);
2834 std::string NSDictFName("__NSContainer_literal");
2835 FunctionDecl *NSDictFD = SynthBlockInitFunctionDecl(NSDictFName);
2836 DeclRefExpr *NSDictDRE = new (Context) DeclRefExpr(
2837 *Context, NSDictFD, false, NSDictFType, VK_RValue, SourceLocation());
2838
2839 SmallVector<Expr*, 16> KeyExprs;
2840 SmallVector<Expr*, 16> ValueExprs;
2841
2842 unsigned NumElements = Exp->getNumElements();
2843 unsigned UnsignedIntSize =
2844 static_cast<unsigned>(Context->getTypeSize(Context->UnsignedIntTy));
2845 Expr *count = IntegerLiteral::Create(*Context,
2846 llvm::APInt(UnsignedIntSize, NumElements),
2847 Context->UnsignedIntTy, SourceLocation());
2848 KeyExprs.push_back(count);
2849 ValueExprs.push_back(count);
2850 for (unsigned i = 0; i < NumElements; i++) {
2851 ObjCDictionaryElement Element = Exp->getKeyValueElement(i);
2852 KeyExprs.push_back(Element.Key);
2853 ValueExprs.push_back(Element.Value);
2854 }
2855
2856 // (const id [])objects
2857 Expr *NSValueCallExpr =
2858 CallExpr::Create(*Context, NSDictDRE, ValueExprs, NSDictFType, VK_LValue,
2859 SourceLocation());
2860
2861 FieldDecl *ARRFD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
2862 SourceLocation(),
2863 &Context->Idents.get("arr"),
2864 Context->getPointerType(Context->VoidPtrTy),
2865 nullptr, /*BitWidth=*/nullptr,
2866 /*Mutable=*/true, ICIS_NoInit);
2867 MemberExpr *DictLiteralValueME =
2868 MemberExpr::CreateImplicit(*Context, NSValueCallExpr, false, ARRFD,
2869 ARRFD->getType(), VK_LValue, OK_Ordinary);
2870 QualType ConstIdT = Context->getObjCIdType().withConst();
2871 CStyleCastExpr * DictValueObjects =
2872 NoTypeInfoCStyleCastExpr(Context,
2873 Context->getPointerType(ConstIdT),
2874 CK_BitCast,
2875 DictLiteralValueME);
2876 // (const id <NSCopying> [])keys
2877 Expr *NSKeyCallExpr = CallExpr::Create(
2878 *Context, NSDictDRE, KeyExprs, NSDictFType, VK_LValue, SourceLocation());
2879
2880 MemberExpr *DictLiteralKeyME =
2881 MemberExpr::CreateImplicit(*Context, NSKeyCallExpr, false, ARRFD,
2882 ARRFD->getType(), VK_LValue, OK_Ordinary);
2883
2884 CStyleCastExpr * DictKeyObjects =
2885 NoTypeInfoCStyleCastExpr(Context,
2886 Context->getPointerType(ConstIdT),
2887 CK_BitCast,
2888 DictLiteralKeyME);
2889
2890 // Synthesize a call to objc_msgSend().
2891 SmallVector<Expr*, 32> MsgExprs;
2892 SmallVector<Expr*, 4> ClsExprs;
2893 QualType expType = Exp->getType();
2894
2895 // Create a call to objc_getClass("NSArray"). It will be th 1st argument.
2896 ObjCInterfaceDecl *Class =
2897 expType->getPointeeType()->castAs<ObjCObjectType>()->getInterface();
2898
2899 IdentifierInfo *clsName = Class->getIdentifier();
2900 ClsExprs.push_back(getStringLiteral(clsName->getName()));
2901 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
2902 StartLoc, EndLoc);
2903 MsgExprs.push_back(Cls);
2904
2905 // Create a call to sel_registerName("arrayWithObjects:count:").
2906 // it will be the 2nd argument.
2907 SmallVector<Expr*, 4> SelExprs;
2908 ObjCMethodDecl *DictMethod = Exp->getDictWithObjectsMethod();
2909 SelExprs.push_back(getStringLiteral(DictMethod->getSelector().getAsString()));
2910 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
2911 SelExprs, StartLoc, EndLoc);
2912 MsgExprs.push_back(SelExp);
2913
2914 // (const id [])objects
2915 MsgExprs.push_back(DictValueObjects);
2916
2917 // (const id <NSCopying> [])keys
2918 MsgExprs.push_back(DictKeyObjects);
2919
2920 // (NSUInteger)cnt
2921 Expr *cnt = IntegerLiteral::Create(*Context,
2922 llvm::APInt(UnsignedIntSize, NumElements),
2923 Context->UnsignedIntTy, SourceLocation());
2924 MsgExprs.push_back(cnt);
2925
2926 SmallVector<QualType, 8> ArgTypes;
2927 ArgTypes.push_back(Context->getObjCClassType());
2928 ArgTypes.push_back(Context->getObjCSelType());
2929 for (const auto *PI : DictMethod->parameters()) {
2930 QualType T = PI->getType();
2931 if (const PointerType* PT = T->getAs<PointerType>()) {
2932 QualType PointeeTy = PT->getPointeeType();
2933 convertToUnqualifiedObjCType(PointeeTy);
2934 T = Context->getPointerType(PointeeTy);
2935 }
2936 ArgTypes.push_back(T);
2937 }
2938
2939 QualType returnType = Exp->getType();
2940 // Get the type, we will need to reference it in a couple spots.
2941 QualType msgSendType = MsgSendFlavor->getType();
2942
2943 // Create a reference to the objc_msgSend() declaration.
2944 DeclRefExpr *DRE = new (Context) DeclRefExpr(
2945 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
2946
2947 CastExpr *cast = NoTypeInfoCStyleCastExpr(
2948 Context, Context->getPointerType(Context->VoidTy), CK_BitCast, DRE);
2949
2950 // Now do the "normal" pointer to function cast.
2951 QualType castType =
2952 getSimpleFunctionType(returnType, ArgTypes, DictMethod->isVariadic());
2953 castType = Context->getPointerType(castType);
2954 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
2955 cast);
2956
2957 // Don't forget the parens to enforce the proper binding.
2958 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
2959
2960 const FunctionType *FT = msgSendType->castAs<FunctionType>();
2961 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
2962 VK_RValue, EndLoc);
2963 ReplaceStmt(Exp, CE);
2964 return CE;
2965}
2966
2967// struct __rw_objc_super {
2968// struct objc_object *object; struct objc_object *superClass;
2969// };
2970QualType RewriteModernObjC::getSuperStructType() {
2971 if (!SuperStructDecl) {
2972 SuperStructDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
2973 SourceLocation(), SourceLocation(),
2974 &Context->Idents.get("__rw_objc_super"));
2975 QualType FieldTypes[2];
2976
2977 // struct objc_object *object;
2978 FieldTypes[0] = Context->getObjCIdType();
2979 // struct objc_object *superClass;
2980 FieldTypes[1] = Context->getObjCIdType();
2981
2982 // Create fields
2983 for (unsigned i = 0; i < 2; ++i) {
2984 SuperStructDecl->addDecl(FieldDecl::Create(*Context, SuperStructDecl,
2985 SourceLocation(),
2986 SourceLocation(), nullptr,
2987 FieldTypes[i], nullptr,
2988 /*BitWidth=*/nullptr,
2989 /*Mutable=*/false,
2990 ICIS_NoInit));
2991 }
2992
2993 SuperStructDecl->completeDefinition();
2994 }
2995 return Context->getTagDeclType(SuperStructDecl);
2996}
2997
2998QualType RewriteModernObjC::getConstantStringStructType() {
2999 if (!ConstantStringDecl) {
3000 ConstantStringDecl = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
3001 SourceLocation(), SourceLocation(),
3002 &Context->Idents.get("__NSConstantStringImpl"));
3003 QualType FieldTypes[4];
3004
3005 // struct objc_object *receiver;
3006 FieldTypes[0] = Context->getObjCIdType();
3007 // int flags;
3008 FieldTypes[1] = Context->IntTy;
3009 // char *str;
3010 FieldTypes[2] = Context->getPointerType(Context->CharTy);
3011 // long length;
3012 FieldTypes[3] = Context->LongTy;
3013
3014 // Create fields
3015 for (unsigned i = 0; i < 4; ++i) {
3016 ConstantStringDecl->addDecl(FieldDecl::Create(*Context,
3017 ConstantStringDecl,
3018 SourceLocation(),
3019 SourceLocation(), nullptr,
3020 FieldTypes[i], nullptr,
3021 /*BitWidth=*/nullptr,
3022 /*Mutable=*/true,
3023 ICIS_NoInit));
3024 }
3025
3026 ConstantStringDecl->completeDefinition();
3027 }
3028 return Context->getTagDeclType(ConstantStringDecl);
3029}
3030
3031/// getFunctionSourceLocation - returns start location of a function
3032/// definition. Complication arises when function has declared as
3033/// extern "C" or extern "C" {...}
3034static SourceLocation getFunctionSourceLocation (RewriteModernObjC &R,
3035 FunctionDecl *FD) {
3036 if (FD->isExternC() && !FD->isMain()) {
3037 const DeclContext *DC = FD->getDeclContext();
3038 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3039 // if it is extern "C" {...}, return function decl's own location.
3040 if (!LSD->getRBraceLoc().isValid())
3041 return LSD->getExternLoc();
3042 }
3043 if (FD->getStorageClass() != SC_None)
3044 R.RewriteBlockLiteralFunctionDecl(FD);
3045 return FD->getTypeSpecStartLoc();
3046}
3047
3048void RewriteModernObjC::RewriteLineDirective(const Decl *D) {
3049
3050 SourceLocation Location = D->getLocation();
3051
3052 if (Location.isFileID() && GenerateLineInfo) {
3053 std::string LineString("\n#line ");
3054 PresumedLoc PLoc = SM->getPresumedLoc(Location);
3055 LineString += utostr(PLoc.getLine());
3056 LineString += " \"";
3057 LineString += Lexer::Stringify(PLoc.getFilename());
3058 if (isa<ObjCMethodDecl>(D))
3059 LineString += "\"";
3060 else LineString += "\"\n";
3061
3062 Location = D->getBeginLoc();
3063 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
3064 if (FD->isExternC() && !FD->isMain()) {
3065 const DeclContext *DC = FD->getDeclContext();
3066 if (const LinkageSpecDecl *LSD = dyn_cast<LinkageSpecDecl>(DC))
3067 // if it is extern "C" {...}, return function decl's own location.
3068 if (!LSD->getRBraceLoc().isValid())
3069 Location = LSD->getExternLoc();
3070 }
3071 }
3072 InsertText(Location, LineString);
3073 }
3074}
3075
3076/// SynthMsgSendStretCallExpr - This routine translates message expression
3077/// into a call to objc_msgSend_stret() entry point. Tricky part is that
3078/// nil check on receiver must be performed before calling objc_msgSend_stret.
3079/// MsgSendStretFlavor - function declaration objc_msgSend_stret(...)
3080/// msgSendType - function type of objc_msgSend_stret(...)
3081/// returnType - Result type of the method being synthesized.
3082/// ArgTypes - type of the arguments passed to objc_msgSend_stret, starting with receiver type.
3083/// MsgExprs - list of argument expressions being passed to objc_msgSend_stret,
3084/// starting with receiver.
3085/// Method - Method being rewritten.
3086Expr *RewriteModernObjC::SynthMsgSendStretCallExpr(FunctionDecl *MsgSendStretFlavor,
3087 QualType returnType,
3088 SmallVectorImpl<QualType> &ArgTypes,
3089 SmallVectorImpl<Expr*> &MsgExprs,
3090 ObjCMethodDecl *Method) {
3091 // Now do the "normal" pointer to function cast.
3092 QualType FuncType = getSimpleFunctionType(
3093 returnType, ArgTypes, Method ? Method->isVariadic() : false);
3094 QualType castType = Context->getPointerType(FuncType);
3095
3096 // build type for containing the objc_msgSend_stret object.
3097 static unsigned stretCount=0;
3098 std::string name = "__Stret"; name += utostr(stretCount);
3099 std::string str =
3100 "extern \"C\" void * __cdecl memset(void *_Dst, int _Val, size_t _Size);\n";
3101 str += "namespace {\n";
3102 str += "struct "; str += name;
3103 str += " {\n\t";
3104 str += name;
3105 str += "(id receiver, SEL sel";
3106 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3107 std::string ArgName = "arg"; ArgName += utostr(i);
3108 ArgTypes[i].getAsStringInternal(ArgName, Context->getPrintingPolicy());
3109 str += ", "; str += ArgName;
3110 }
3111 // could be vararg.
3112 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3113 std::string ArgName = "arg"; ArgName += utostr(i);
3114 MsgExprs[i]->getType().getAsStringInternal(ArgName,
3115 Context->getPrintingPolicy());
3116 str += ", "; str += ArgName;
3117 }
3118
3119 str += ") {\n";
3120 str += "\t unsigned size = sizeof(";
3121 str += returnType.getAsString(Context->getPrintingPolicy()); str += ");\n";
3122
3123 str += "\t if (size == 1 || size == 2 || size == 4 || size == 8)\n";
3124
3125 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3126 str += ")(void *)objc_msgSend)(receiver, sel";
3127 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3128 str += ", arg"; str += utostr(i);
3129 }
3130 // could be vararg.
3131 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3132 str += ", arg"; str += utostr(i);
3133 }
3134 str+= ");\n";
3135
3136 str += "\t else if (receiver == 0)\n";
3137 str += "\t memset((void*)&s, 0, sizeof(s));\n";
3138 str += "\t else\n";
3139
3140 str += "\t s = (("; str += castType.getAsString(Context->getPrintingPolicy());
3141 str += ")(void *)objc_msgSend_stret)(receiver, sel";
3142 for (unsigned i = 2; i < ArgTypes.size(); i++) {
3143 str += ", arg"; str += utostr(i);
3144 }
3145 // could be vararg.
3146 for (unsigned i = ArgTypes.size(); i < MsgExprs.size(); i++) {
3147 str += ", arg"; str += utostr(i);
3148 }
3149 str += ");\n";
3150
3151 str += "\t}\n";
3152 str += "\t"; str += returnType.getAsString(Context->getPrintingPolicy());
3153 str += " s;\n";
3154 str += "};\n};\n\n";
3155 SourceLocation FunLocStart;
3156 if (CurFunctionDef)
3157 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
3158 else {
3159 assert(CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null")((CurMethodDef && "SynthMsgSendStretCallExpr - CurMethodDef is null"
) ? static_cast<void> (0) : __assert_fail ("CurMethodDef && \"SynthMsgSendStretCallExpr - CurMethodDef is null\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3159, __PRETTY_FUNCTION__))
;
3160 FunLocStart = CurMethodDef->getBeginLoc();
3161 }
3162
3163 InsertText(FunLocStart, str);
3164 ++stretCount;
3165
3166 // AST for __Stretn(receiver, args).s;
3167 IdentifierInfo *ID = &Context->Idents.get(name);
3168 FunctionDecl *FD =
3169 FunctionDecl::Create(*Context, TUDecl, SourceLocation(), SourceLocation(),
3170 ID, FuncType, nullptr, SC_Extern, false, false);
3171 DeclRefExpr *DRE = new (Context)
3172 DeclRefExpr(*Context, FD, false, castType, VK_RValue, SourceLocation());
3173 CallExpr *STCE = CallExpr::Create(*Context, DRE, MsgExprs, castType,
3174 VK_LValue, SourceLocation());
3175
3176 FieldDecl *FieldD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
3177 SourceLocation(),
3178 &Context->Idents.get("s"),
3179 returnType, nullptr,
3180 /*BitWidth=*/nullptr,
3181 /*Mutable=*/true, ICIS_NoInit);
3182 MemberExpr *ME = MemberExpr::CreateImplicit(
3183 *Context, STCE, false, FieldD, FieldD->getType(), VK_LValue, OK_Ordinary);
3184
3185 return ME;
3186}
3187
3188Stmt *RewriteModernObjC::SynthMessageExpr(ObjCMessageExpr *Exp,
3189 SourceLocation StartLoc,
3190 SourceLocation EndLoc) {
3191 if (!SelGetUidFunctionDecl)
3192 SynthSelGetUidFunctionDecl();
3193 if (!MsgSendFunctionDecl)
3194 SynthMsgSendFunctionDecl();
3195 if (!MsgSendSuperFunctionDecl)
3196 SynthMsgSendSuperFunctionDecl();
3197 if (!MsgSendStretFunctionDecl)
3198 SynthMsgSendStretFunctionDecl();
3199 if (!MsgSendSuperStretFunctionDecl)
3200 SynthMsgSendSuperStretFunctionDecl();
3201 if (!MsgSendFpretFunctionDecl)
3202 SynthMsgSendFpretFunctionDecl();
3203 if (!GetClassFunctionDecl)
3204 SynthGetClassFunctionDecl();
3205 if (!GetSuperClassFunctionDecl)
3206 SynthGetSuperClassFunctionDecl();
3207 if (!GetMetaClassFunctionDecl)
3208 SynthGetMetaClassFunctionDecl();
3209
3210 // default to objc_msgSend().
3211 FunctionDecl *MsgSendFlavor = MsgSendFunctionDecl;
3212 // May need to use objc_msgSend_stret() as well.
3213 FunctionDecl *MsgSendStretFlavor = nullptr;
3214 if (ObjCMethodDecl *mDecl = Exp->getMethodDecl()) {
3215 QualType resultType = mDecl->getReturnType();
3216 if (resultType->isRecordType())
3217 MsgSendStretFlavor = MsgSendStretFunctionDecl;
3218 else if (resultType->isRealFloatingType())
3219 MsgSendFlavor = MsgSendFpretFunctionDecl;
3220 }
3221
3222 // Synthesize a call to objc_msgSend().
3223 SmallVector<Expr*, 8> MsgExprs;
3224 switch (Exp->getReceiverKind()) {
3225 case ObjCMessageExpr::SuperClass: {
3226 MsgSendFlavor = MsgSendSuperFunctionDecl;
3227 if (MsgSendStretFlavor)
3228 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3229 assert(MsgSendFlavor && "MsgSendFlavor is NULL!")((MsgSendFlavor && "MsgSendFlavor is NULL!") ? static_cast
<void> (0) : __assert_fail ("MsgSendFlavor && \"MsgSendFlavor is NULL!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3229, __PRETTY_FUNCTION__))
;
3230
3231 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3232
3233 SmallVector<Expr*, 4> InitExprs;
3234
3235 // set the receiver to self, the first argument to all methods.
3236 InitExprs.push_back(
3237 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3238 CK_BitCast,
3239 new (Context) DeclRefExpr(*Context,
3240 CurMethodDef->getSelfDecl(),
3241 false,
3242 Context->getObjCIdType(),
3243 VK_RValue,
3244 SourceLocation()))
3245 ); // set the 'receiver'.
3246
3247 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3248 SmallVector<Expr*, 8> ClsExprs;
3249 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3250 // (Class)objc_getClass("CurrentClass")
3251 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetMetaClassFunctionDecl,
3252 ClsExprs, StartLoc, EndLoc);
3253 ClsExprs.clear();
3254 ClsExprs.push_back(Cls);
3255 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3256 StartLoc, EndLoc);
3257
3258 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3259 // To turn off a warning, type-cast to 'id'
3260 InitExprs.push_back( // set 'super class', using class_getSuperclass().
3261 NoTypeInfoCStyleCastExpr(Context,
3262 Context->getObjCIdType(),
3263 CK_BitCast, Cls));
3264 // struct __rw_objc_super
3265 QualType superType = getSuperStructType();
3266 Expr *SuperRep;
3267
3268 if (LangOpts.MicrosoftExt) {
3269 SynthSuperConstructorFunctionDecl();
3270 // Simulate a constructor call...
3271 DeclRefExpr *DRE = new (Context)
3272 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3273 VK_LValue, SourceLocation());
3274 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3275 VK_LValue, SourceLocation());
3276 // The code for super is a little tricky to prevent collision with
3277 // the structure definition in the header. The rewriter has it's own
3278 // internal definition (__rw_objc_super) that is uses. This is why
3279 // we need the cast below. For example:
3280 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3281 //
3282 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3283 Context->getPointerType(SuperRep->getType()),
3284 VK_RValue, OK_Ordinary,
3285 SourceLocation(), false);
3286 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3287 Context->getPointerType(superType),
3288 CK_BitCast, SuperRep);
3289 } else {
3290 // (struct __rw_objc_super) { <exprs from above> }
3291 InitListExpr *ILE =
3292 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3293 SourceLocation());
3294 TypeSourceInfo *superTInfo
3295 = Context->getTrivialTypeSourceInfo(superType);
3296 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3297 superType, VK_LValue,
3298 ILE, false);
3299 // struct __rw_objc_super *
3300 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3301 Context->getPointerType(SuperRep->getType()),
3302 VK_RValue, OK_Ordinary,
3303 SourceLocation(), false);
3304 }
3305 MsgExprs.push_back(SuperRep);
3306 break;
3307 }
3308
3309 case ObjCMessageExpr::Class: {
3310 SmallVector<Expr*, 8> ClsExprs;
3311 ObjCInterfaceDecl *Class
3312 = Exp->getClassReceiver()->castAs<ObjCObjectType>()->getInterface();
3313 IdentifierInfo *clsName = Class->getIdentifier();
3314 ClsExprs.push_back(getStringLiteral(clsName->getName()));
3315 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3316 StartLoc, EndLoc);
3317 CastExpr *ArgExpr = NoTypeInfoCStyleCastExpr(Context,
3318 Context->getObjCIdType(),
3319 CK_BitCast, Cls);
3320 MsgExprs.push_back(ArgExpr);
3321 break;
3322 }
3323
3324 case ObjCMessageExpr::SuperInstance:{
3325 MsgSendFlavor = MsgSendSuperFunctionDecl;
3326 if (MsgSendStretFlavor)
3327 MsgSendStretFlavor = MsgSendSuperStretFunctionDecl;
3328 assert(MsgSendFlavor && "MsgSendFlavor is NULL!")((MsgSendFlavor && "MsgSendFlavor is NULL!") ? static_cast
<void> (0) : __assert_fail ("MsgSendFlavor && \"MsgSendFlavor is NULL!\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3328, __PRETTY_FUNCTION__))
;
3329 ObjCInterfaceDecl *ClassDecl = CurMethodDef->getClassInterface();
3330 SmallVector<Expr*, 4> InitExprs;
3331
3332 InitExprs.push_back(
3333 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3334 CK_BitCast,
3335 new (Context) DeclRefExpr(*Context,
3336 CurMethodDef->getSelfDecl(),
3337 false,
3338 Context->getObjCIdType(),
3339 VK_RValue, SourceLocation()))
3340 ); // set the 'receiver'.
3341
3342 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3343 SmallVector<Expr*, 8> ClsExprs;
3344 ClsExprs.push_back(getStringLiteral(ClassDecl->getIdentifier()->getName()));
3345 // (Class)objc_getClass("CurrentClass")
3346 CallExpr *Cls = SynthesizeCallToFunctionDecl(GetClassFunctionDecl, ClsExprs,
3347 StartLoc, EndLoc);
3348 ClsExprs.clear();
3349 ClsExprs.push_back(Cls);
3350 Cls = SynthesizeCallToFunctionDecl(GetSuperClassFunctionDecl, ClsExprs,
3351 StartLoc, EndLoc);
3352
3353 // (id)class_getSuperclass((Class)objc_getClass("CurrentClass"))
3354 // To turn off a warning, type-cast to 'id'
3355 InitExprs.push_back(
3356 // set 'super class', using class_getSuperclass().
3357 NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3358 CK_BitCast, Cls));
3359 // struct __rw_objc_super
3360 QualType superType = getSuperStructType();
3361 Expr *SuperRep;
3362
3363 if (LangOpts.MicrosoftExt) {
3364 SynthSuperConstructorFunctionDecl();
3365 // Simulate a constructor call...
3366 DeclRefExpr *DRE = new (Context)
3367 DeclRefExpr(*Context, SuperConstructorFunctionDecl, false, superType,
3368 VK_LValue, SourceLocation());
3369 SuperRep = CallExpr::Create(*Context, DRE, InitExprs, superType,
3370 VK_LValue, SourceLocation());
3371 // The code for super is a little tricky to prevent collision with
3372 // the structure definition in the header. The rewriter has it's own
3373 // internal definition (__rw_objc_super) that is uses. This is why
3374 // we need the cast below. For example:
3375 // (struct __rw_objc_super *)&__rw_objc_super((id)self, (id)objc_getClass("SUPER"))
3376 //
3377 SuperRep = new (Context) UnaryOperator(SuperRep, UO_AddrOf,
3378 Context->getPointerType(SuperRep->getType()),
3379 VK_RValue, OK_Ordinary,
3380 SourceLocation(), false);
3381 SuperRep = NoTypeInfoCStyleCastExpr(Context,
3382 Context->getPointerType(superType),
3383 CK_BitCast, SuperRep);
3384 } else {
3385 // (struct __rw_objc_super) { <exprs from above> }
3386 InitListExpr *ILE =
3387 new (Context) InitListExpr(*Context, SourceLocation(), InitExprs,
3388 SourceLocation());
3389 TypeSourceInfo *superTInfo
3390 = Context->getTrivialTypeSourceInfo(superType);
3391 SuperRep = new (Context) CompoundLiteralExpr(SourceLocation(), superTInfo,
3392 superType, VK_RValue, ILE,
3393 false);
3394 }
3395 MsgExprs.push_back(SuperRep);
3396 break;
3397 }
3398
3399 case ObjCMessageExpr::Instance: {
3400 // Remove all type-casts because it may contain objc-style types; e.g.
3401 // Foo<Proto> *.
3402 Expr *recExpr = Exp->getInstanceReceiver();
3403 while (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(recExpr))
3404 recExpr = CE->getSubExpr();
3405 CastKind CK = recExpr->getType()->isObjCObjectPointerType()
3406 ? CK_BitCast : recExpr->getType()->isBlockPointerType()
3407 ? CK_BlockPointerToObjCPointerCast
3408 : CK_CPointerToObjCPointerCast;
3409
3410 recExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3411 CK, recExpr);
3412 MsgExprs.push_back(recExpr);
3413 break;
3414 }
3415 }
3416
3417 // Create a call to sel_registerName("selName"), it will be the 2nd argument.
3418 SmallVector<Expr*, 8> SelExprs;
3419 SelExprs.push_back(getStringLiteral(Exp->getSelector().getAsString()));
3420 CallExpr *SelExp = SynthesizeCallToFunctionDecl(SelGetUidFunctionDecl,
3421 SelExprs, StartLoc, EndLoc);
3422 MsgExprs.push_back(SelExp);
3423
3424 // Now push any user supplied arguments.
3425 for (unsigned i = 0; i < Exp->getNumArgs(); i++) {
3426 Expr *userExpr = Exp->getArg(i);
3427 // Make all implicit casts explicit...ICE comes in handy:-)
3428 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(userExpr)) {
3429 // Reuse the ICE type, it is exactly what the doctor ordered.
3430 QualType type = ICE->getType();
3431 if (needToScanForQualifiers(type))
3432 type = Context->getObjCIdType();
3433 // Make sure we convert "type (^)(...)" to "type (*)(...)".
3434 (void)convertBlockPointerToFunctionPointer(type);
3435 const Expr *SubExpr = ICE->IgnoreParenImpCasts();
3436 CastKind CK;
3437 if (SubExpr->getType()->isIntegralType(*Context) &&
3438 type->isBooleanType()) {
3439 CK = CK_IntegralToBoolean;
3440 } else if (type->isObjCObjectPointerType()) {
3441 if (SubExpr->getType()->isBlockPointerType()) {
3442 CK = CK_BlockPointerToObjCPointerCast;
3443 } else if (SubExpr->getType()->isPointerType()) {
3444 CK = CK_CPointerToObjCPointerCast;
3445 } else {
3446 CK = CK_BitCast;
3447 }
3448 } else {
3449 CK = CK_BitCast;
3450 }
3451
3452 userExpr = NoTypeInfoCStyleCastExpr(Context, type, CK, userExpr);
3453 }
3454 // Make id<P...> cast into an 'id' cast.
3455 else if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(userExpr)) {
3456 if (CE->getType()->isObjCQualifiedIdType()) {
3457 while ((CE = dyn_cast<CStyleCastExpr>(userExpr)))
3458 userExpr = CE->getSubExpr();
3459 CastKind CK;
3460 if (userExpr->getType()->isIntegralType(*Context)) {
3461 CK = CK_IntegralToPointer;
3462 } else if (userExpr->getType()->isBlockPointerType()) {
3463 CK = CK_BlockPointerToObjCPointerCast;
3464 } else if (userExpr->getType()->isPointerType()) {
3465 CK = CK_CPointerToObjCPointerCast;
3466 } else {
3467 CK = CK_BitCast;
3468 }
3469 userExpr = NoTypeInfoCStyleCastExpr(Context, Context->getObjCIdType(),
3470 CK, userExpr);
3471 }
3472 }
3473 MsgExprs.push_back(userExpr);
3474 // We've transferred the ownership to MsgExprs. For now, we *don't* null
3475 // out the argument in the original expression (since we aren't deleting
3476 // the ObjCMessageExpr). See RewritePropertyOrImplicitSetter() usage for more info.
3477 //Exp->setArg(i, 0);
3478 }
3479 // Generate the funky cast.
3480 CastExpr *cast;
3481 SmallVector<QualType, 8> ArgTypes;
3482 QualType returnType;
3483
3484 // Push 'id' and 'SEL', the 2 implicit arguments.
3485 if (MsgSendFlavor == MsgSendSuperFunctionDecl)
3486 ArgTypes.push_back(Context->getPointerType(getSuperStructType()));
3487 else
3488 ArgTypes.push_back(Context->getObjCIdType());
3489 ArgTypes.push_back(Context->getObjCSelType());
3490 if (ObjCMethodDecl *OMD = Exp->getMethodDecl()) {
3491 // Push any user argument types.
3492 for (const auto *PI : OMD->parameters()) {
3493 QualType t = PI->getType()->isObjCQualifiedIdType()
3494 ? Context->getObjCIdType()
3495 : PI->getType();
3496 // Make sure we convert "t (^)(...)" to "t (*)(...)".
3497 (void)convertBlockPointerToFunctionPointer(t);
3498 ArgTypes.push_back(t);
3499 }
3500 returnType = Exp->getType();
3501 convertToUnqualifiedObjCType(returnType);
3502 (void)convertBlockPointerToFunctionPointer(returnType);
3503 } else {
3504 returnType = Context->getObjCIdType();
3505 }
3506 // Get the type, we will need to reference it in a couple spots.
3507 QualType msgSendType = MsgSendFlavor->getType();
3508
3509 // Create a reference to the objc_msgSend() declaration.
3510 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3511 *Context, MsgSendFlavor, false, msgSendType, VK_LValue, SourceLocation());
3512
3513 // Need to cast objc_msgSend to "void *" (to workaround a GCC bandaid).
3514 // If we don't do this cast, we get the following bizarre warning/note:
3515 // xx.m:13: warning: function called through a non-compatible type
3516 // xx.m:13: note: if this code is reached, the program will abort
3517 cast = NoTypeInfoCStyleCastExpr(Context,
3518 Context->getPointerType(Context->VoidTy),
3519 CK_BitCast, DRE);
3520
3521 // Now do the "normal" pointer to function cast.
3522 // If we don't have a method decl, force a variadic cast.
3523 const ObjCMethodDecl *MD = Exp->getMethodDecl();
3524 QualType castType =
3525 getSimpleFunctionType(returnType, ArgTypes, MD ? MD->isVariadic() : true);
3526 castType = Context->getPointerType(castType);
3527 cast = NoTypeInfoCStyleCastExpr(Context, castType, CK_BitCast,
3528 cast);
3529
3530 // Don't forget the parens to enforce the proper binding.
3531 ParenExpr *PE = new (Context) ParenExpr(StartLoc, EndLoc, cast);
3532
3533 const FunctionType *FT = msgSendType->castAs<FunctionType>();
3534 CallExpr *CE = CallExpr::Create(*Context, PE, MsgExprs, FT->getReturnType(),
3535 VK_RValue, EndLoc);
3536 Stmt *ReplacingStmt = CE;
3537 if (MsgSendStretFlavor) {
3538 // We have the method which returns a struct/union. Must also generate
3539 // call to objc_msgSend_stret and hang both varieties on a conditional
3540 // expression which dictate which one to envoke depending on size of
3541 // method's return type.
3542
3543 Expr *STCE = SynthMsgSendStretCallExpr(MsgSendStretFlavor,
3544 returnType,
3545 ArgTypes, MsgExprs,
3546 Exp->getMethodDecl());
3547 ReplacingStmt = STCE;
3548 }
3549 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3550 return ReplacingStmt;
3551}
3552
3553Stmt *RewriteModernObjC::RewriteMessageExpr(ObjCMessageExpr *Exp) {
3554 Stmt *ReplacingStmt =
3555 SynthMessageExpr(Exp, Exp->getBeginLoc(), Exp->getEndLoc());
3556
3557 // Now do the actual rewrite.
3558 ReplaceStmt(Exp, ReplacingStmt);
3559
3560 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3561 return ReplacingStmt;
3562}
3563
3564// typedef struct objc_object Protocol;
3565QualType RewriteModernObjC::getProtocolType() {
3566 if (!ProtocolTypeDecl) {
3567 TypeSourceInfo *TInfo
3568 = Context->getTrivialTypeSourceInfo(Context->getObjCIdType());
3569 ProtocolTypeDecl = TypedefDecl::Create(*Context, TUDecl,
3570 SourceLocation(), SourceLocation(),
3571 &Context->Idents.get("Protocol"),
3572 TInfo);
3573 }
3574 return Context->getTypeDeclType(ProtocolTypeDecl);
3575}
3576
3577/// RewriteObjCProtocolExpr - Rewrite a protocol expression into
3578/// a synthesized/forward data reference (to the protocol's metadata).
3579/// The forward references (and metadata) are generated in
3580/// RewriteModernObjC::HandleTranslationUnit().
3581Stmt *RewriteModernObjC::RewriteObjCProtocolExpr(ObjCProtocolExpr *Exp) {
3582 std::string Name = "_OBJC_PROTOCOL_REFERENCE_$_" +
3583 Exp->getProtocol()->getNameAsString();
3584 IdentifierInfo *ID = &Context->Idents.get(Name);
3585 VarDecl *VD = VarDecl::Create(*Context, TUDecl, SourceLocation(),
3586 SourceLocation(), ID, getProtocolType(),
3587 nullptr, SC_Extern);
3588 DeclRefExpr *DRE = new (Context) DeclRefExpr(
3589 *Context, VD, false, getProtocolType(), VK_LValue, SourceLocation());
3590 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(
3591 Context, Context->getPointerType(DRE->getType()), CK_BitCast, DRE);
3592 ReplaceStmt(Exp, castExpr);
3593 ProtocolExprDecls.insert(Exp->getProtocol()->getCanonicalDecl());
3594 // delete Exp; leak for now, see RewritePropertyOrImplicitSetter() usage for more info.
3595 return castExpr;
3596}
3597
3598/// IsTagDefinedInsideClass - This routine checks that a named tagged type
3599/// is defined inside an objective-c class. If so, it returns true.
3600bool RewriteModernObjC::IsTagDefinedInsideClass(ObjCContainerDecl *IDecl,
3601 TagDecl *Tag,
3602 bool &IsNamedDefinition) {
3603 if (!IDecl)
3604 return false;
3605 SourceLocation TagLocation;
3606 if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) {
3607 RD = RD->getDefinition();
3608 if (!RD || !RD->getDeclName().getAsIdentifierInfo())
3609 return false;
3610 IsNamedDefinition = true;
3611 TagLocation = RD->getLocation();
3612 return Context->getSourceManager().isBeforeInTranslationUnit(
3613 IDecl->getLocation(), TagLocation);
3614 }
3615 if (EnumDecl *ED = dyn_cast<EnumDecl>(Tag)) {
3616 if (!ED || !ED->getDeclName().getAsIdentifierInfo())
3617 return false;
3618 IsNamedDefinition = true;
3619 TagLocation = ED->getLocation();
3620 return Context->getSourceManager().isBeforeInTranslationUnit(
3621 IDecl->getLocation(), TagLocation);
3622 }
3623 return false;
3624}
3625
3626/// RewriteObjCFieldDeclType - This routine rewrites a type into the buffer.
3627/// It handles elaborated types, as well as enum types in the process.
3628bool RewriteModernObjC::RewriteObjCFieldDeclType(QualType &Type,
3629 std::string &Result) {
3630 if (isa<TypedefType>(Type)) {
3631 Result += "\t";
3632 return false;
3633 }
3634
3635 if (Type->isArrayType()) {
3636 QualType ElemTy = Context->getBaseElementType(Type);
3637 return RewriteObjCFieldDeclType(ElemTy, Result);
3638 }
3639 else if (Type->isRecordType()) {
3640 RecordDecl *RD = Type->castAs<RecordType>()->getDecl();
3641 if (RD->isCompleteDefinition()) {
3642 if (RD->isStruct())
3643 Result += "\n\tstruct ";
3644 else if (RD->isUnion())
3645 Result += "\n\tunion ";
3646 else
3647 assert(false && "class not allowed as an ivar type")((false && "class not allowed as an ivar type") ? static_cast
<void> (0) : __assert_fail ("false && \"class not allowed as an ivar type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3647, __PRETTY_FUNCTION__))
;
3648
3649 Result += RD->getName();
3650 if (GlobalDefinedTags.count(RD)) {
3651 // struct/union is defined globally, use it.
3652 Result += " ";
3653 return true;
3654 }
3655 Result += " {\n";
3656 for (auto *FD : RD->fields())
3657 RewriteObjCFieldDecl(FD, Result);
3658 Result += "\t} ";
3659 return true;
3660 }
3661 }
3662 else if (Type->isEnumeralType()) {
3663 EnumDecl *ED = Type->castAs<EnumType>()->getDecl();
3664 if (ED->isCompleteDefinition()) {
3665 Result += "\n\tenum ";
3666 Result += ED->getName();
3667 if (GlobalDefinedTags.count(ED)) {
3668 // Enum is globall defined, use it.
3669 Result += " ";
3670 return true;
3671 }
3672
3673 Result += " {\n";
3674 for (const auto *EC : ED->enumerators()) {
3675 Result += "\t"; Result += EC->getName(); Result += " = ";
3676 llvm::APSInt Val = EC->getInitVal();
3677 Result += Val.toString(10);
3678 Result += ",\n";
3679 }
3680 Result += "\t} ";
3681 return true;
3682 }
3683 }
3684
3685 Result += "\t";
3686 convertObjCTypeToCStyleType(Type);
3687 return false;
3688}
3689
3690
3691/// RewriteObjCFieldDecl - This routine rewrites a field into the buffer.
3692/// It handles elaborated types, as well as enum types in the process.
3693void RewriteModernObjC::RewriteObjCFieldDecl(FieldDecl *fieldDecl,
3694 std::string &Result) {
3695 QualType Type = fieldDecl->getType();
3696 std::string Name = fieldDecl->getNameAsString();
3697
3698 bool EleboratedType = RewriteObjCFieldDeclType(Type, Result);
3699 if (!EleboratedType)
3700 Type.getAsStringInternal(Name, Context->getPrintingPolicy());
3701 Result += Name;
3702 if (fieldDecl->isBitField()) {
3703 Result += " : "; Result += utostr(fieldDecl->getBitWidthValue(*Context));
3704 }
3705 else if (EleboratedType && Type->isArrayType()) {
3706 const ArrayType *AT = Context->getAsArrayType(Type);
3707 do {
3708 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
3709 Result += "[";
3710 llvm::APInt Dim = CAT->getSize();
3711 Result += utostr(Dim.getZExtValue());
3712 Result += "]";
3713 }
3714 AT = Context->getAsArrayType(AT->getElementType());
3715 } while (AT);
3716 }
3717
3718 Result += ";\n";
3719}
3720
3721/// RewriteLocallyDefinedNamedAggregates - This routine rewrites locally defined
3722/// named aggregate types into the input buffer.
3723void RewriteModernObjC::RewriteLocallyDefinedNamedAggregates(FieldDecl *fieldDecl,
3724 std::string &Result) {
3725 QualType Type = fieldDecl->getType();
3726 if (isa<TypedefType>(Type))
3727 return;
3728 if (Type->isArrayType())
3729 Type = Context->getBaseElementType(Type);
3730
3731 auto *IDecl = dyn_cast<ObjCContainerDecl>(fieldDecl->getDeclContext());
3732
3733 TagDecl *TD = nullptr;
3734 if (Type->isRecordType()) {
3735 TD = Type->castAs<RecordType>()->getDecl();
3736 }
3737 else if (Type->isEnumeralType()) {
3738 TD = Type->castAs<EnumType>()->getDecl();
3739 }
3740
3741 if (TD) {
3742 if (GlobalDefinedTags.count(TD))
3743 return;
3744
3745 bool IsNamedDefinition = false;
3746 if (IsTagDefinedInsideClass(IDecl, TD, IsNamedDefinition)) {
3747 RewriteObjCFieldDeclType(Type, Result);
3748 Result += ";";
3749 }
3750 if (IsNamedDefinition)
3751 GlobalDefinedTags.insert(TD);
3752 }
3753}
3754
3755unsigned RewriteModernObjC::ObjCIvarBitfieldGroupNo(ObjCIvarDecl *IV) {
3756 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3757 if (ObjCInterefaceHasBitfieldGroups.count(CDecl)) {
3758 return IvarGroupNumber[IV];
3759 }
3760 unsigned GroupNo = 0;
3761 SmallVector<const ObjCIvarDecl *, 8> IVars;
3762 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3763 IVD; IVD = IVD->getNextIvar())
3764 IVars.push_back(IVD);
3765
3766 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3767 if (IVars[i]->isBitField()) {
3768 IvarGroupNumber[IVars[i++]] = ++GroupNo;
3769 while (i < e && IVars[i]->isBitField())
3770 IvarGroupNumber[IVars[i++]] = GroupNo;
3771 if (i < e)
3772 --i;
3773 }
3774
3775 ObjCInterefaceHasBitfieldGroups.insert(CDecl);
3776 return IvarGroupNumber[IV];
3777}
3778
3779QualType RewriteModernObjC::SynthesizeBitfieldGroupStructType(
3780 ObjCIvarDecl *IV,
3781 SmallVectorImpl<ObjCIvarDecl *> &IVars) {
3782 std::string StructTagName;
3783 ObjCIvarBitfieldGroupType(IV, StructTagName);
3784 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct,
3785 Context->getTranslationUnitDecl(),
3786 SourceLocation(), SourceLocation(),
3787 &Context->Idents.get(StructTagName));
3788 for (unsigned i=0, e = IVars.size(); i < e; i++) {
3789 ObjCIvarDecl *Ivar = IVars[i];
3790 RD->addDecl(FieldDecl::Create(*Context, RD, SourceLocation(), SourceLocation(),
3791 &Context->Idents.get(Ivar->getName()),
3792 Ivar->getType(),
3793 nullptr, /*Expr *BW */Ivar->getBitWidth(),
3794 false, ICIS_NoInit));
3795 }
3796 RD->completeDefinition();
3797 return Context->getTagDeclType(RD);
3798}
3799
3800QualType RewriteModernObjC::GetGroupRecordTypeForObjCIvarBitfield(ObjCIvarDecl *IV) {
3801 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3802 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3803 std::pair<const ObjCInterfaceDecl*, unsigned> tuple = std::make_pair(CDecl, GroupNo);
3804 if (GroupRecordType.count(tuple))
3805 return GroupRecordType[tuple];
3806
3807 SmallVector<ObjCIvarDecl *, 8> IVars;
3808 for (const ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3809 IVD; IVD = IVD->getNextIvar()) {
3810 if (IVD->isBitField())
3811 IVars.push_back(const_cast<ObjCIvarDecl *>(IVD));
3812 else {
3813 if (!IVars.empty()) {
3814 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3815 // Generate the struct type for this group of bitfield ivars.
3816 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3817 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3818 IVars.clear();
3819 }
3820 }
3821 }
3822 if (!IVars.empty()) {
3823 // Do the last one.
3824 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IVars[0]);
3825 GroupRecordType[std::make_pair(CDecl, GroupNo)] =
3826 SynthesizeBitfieldGroupStructType(IVars[0], IVars);
3827 }
3828 QualType RetQT = GroupRecordType[tuple];
3829 assert(!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL")((!RetQT.isNull() && "GetGroupRecordTypeForObjCIvarBitfield struct type is NULL"
) ? static_cast<void> (0) : __assert_fail ("!RetQT.isNull() && \"GetGroupRecordTypeForObjCIvarBitfield struct type is NULL\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3829, __PRETTY_FUNCTION__))
;
3830
3831 return RetQT;
3832}
3833
3834/// ObjCIvarBitfieldGroupDecl - Names field decl. for ivar bitfield group.
3835/// Name would be: classname__GRBF_n where n is the group number for this ivar.
3836void RewriteModernObjC::ObjCIvarBitfieldGroupDecl(ObjCIvarDecl *IV,
3837 std::string &Result) {
3838 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3839 Result += CDecl->getName();
3840 Result += "__GRBF_";
3841 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3842 Result += utostr(GroupNo);
3843}
3844
3845/// ObjCIvarBitfieldGroupType - Names struct type for ivar bitfield group.
3846/// Name of the struct would be: classname__T_n where n is the group number for
3847/// this ivar.
3848void RewriteModernObjC::ObjCIvarBitfieldGroupType(ObjCIvarDecl *IV,
3849 std::string &Result) {
3850 const ObjCInterfaceDecl *CDecl = IV->getContainingInterface();
3851 Result += CDecl->getName();
3852 Result += "__T_";
3853 unsigned GroupNo = ObjCIvarBitfieldGroupNo(IV);
3854 Result += utostr(GroupNo);
3855}
3856
3857/// ObjCIvarBitfieldGroupOffset - Names symbol for ivar bitfield group field offset.
3858/// Name would be: OBJC_IVAR_$_classname__GRBF_n where n is the group number for
3859/// this ivar.
3860void RewriteModernObjC::ObjCIvarBitfieldGroupOffset(ObjCIvarDecl *IV,
3861 std::string &Result) {
3862 Result += "OBJC_IVAR_$_";
3863 ObjCIvarBitfieldGroupDecl(IV, Result);
3864}
3865
3866#define SKIP_BITFIELDS(IX, ENDIX, VEC){ while ((IX < ENDIX) && VEC[IX]->isBitField())
++IX; if (IX < ENDIX) --IX; }
{ \
3867 while ((IX < ENDIX) && VEC[IX]->isBitField()) \
3868 ++IX; \
3869 if (IX < ENDIX) \
3870 --IX; \
3871}
3872
3873/// RewriteObjCInternalStruct - Rewrite one internal struct corresponding to
3874/// an objective-c class with ivars.
3875void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
3876 std::string &Result) {
3877 assert(CDecl && "Class missing in SynthesizeObjCInternalStruct")((CDecl && "Class missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl && \"Class missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3877, __PRETTY_FUNCTION__))
;
3878 assert(CDecl->getName() != "" &&((CDecl->getName() != "" && "Name missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl->getName() != \"\" && \"Name missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3879, __PRETTY_FUNCTION__))
3879 "Name missing in SynthesizeObjCInternalStruct")((CDecl->getName() != "" && "Name missing in SynthesizeObjCInternalStruct"
) ? static_cast<void> (0) : __assert_fail ("CDecl->getName() != \"\" && \"Name missing in SynthesizeObjCInternalStruct\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3879, __PRETTY_FUNCTION__))
;
3880 ObjCInterfaceDecl *RCDecl = CDecl->getSuperClass();
3881 SmallVector<ObjCIvarDecl *, 8> IVars;
3882 for (ObjCIvarDecl *IVD = CDecl->all_declared_ivar_begin();
3883 IVD; IVD = IVD->getNextIvar())
3884 IVars.push_back(IVD);
3885
3886 SourceLocation LocStart = CDecl->getBeginLoc();
3887 SourceLocation LocEnd = CDecl->getEndOfDefinitionLoc();
3888
3889 const char *startBuf = SM->getCharacterData(LocStart);
3890 const char *endBuf = SM->getCharacterData(LocEnd);
3891
3892 // If no ivars and no root or if its root, directly or indirectly,
3893 // have no ivars (thus not synthesized) then no need to synthesize this class.
3894 if ((!CDecl->isThisDeclarationADefinition() || IVars.size() == 0) &&
3895 (!RCDecl || !ObjCSynthesizedStructs.count(RCDecl))) {
3896 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3897 ReplaceText(LocStart, endBuf-startBuf, Result);
3898 return;
3899 }
3900
3901 // Insert named struct/union definitions inside class to
3902 // outer scope. This follows semantics of locally defined
3903 // struct/unions in objective-c classes.
3904 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3905 RewriteLocallyDefinedNamedAggregates(IVars[i], Result);
3906
3907 // Insert named structs which are syntheized to group ivar bitfields
3908 // to outer scope as well.
3909 for (unsigned i = 0, e = IVars.size(); i < e; i++)
3910 if (IVars[i]->isBitField()) {
3911 ObjCIvarDecl *IV = IVars[i];
3912 QualType QT = GetGroupRecordTypeForObjCIvarBitfield(IV);
3913 RewriteObjCFieldDeclType(QT, Result);
3914 Result += ";";
3915 // skip over ivar bitfields in this group.
3916 SKIP_BITFIELDS(i , e, IVars){ while ((i < e) && IVars[i]->isBitField()) ++i
; if (i < e) --i; }
;
3917 }
3918
3919 Result += "\nstruct ";
3920 Result += CDecl->getNameAsString();
3921 Result += "_IMPL {\n";
3922
3923 if (RCDecl && ObjCSynthesizedStructs.count(RCDecl)) {
3924 Result += "\tstruct "; Result += RCDecl->getNameAsString();
3925 Result += "_IMPL "; Result += RCDecl->getNameAsString();
3926 Result += "_IVARS;\n";
3927 }
3928
3929 for (unsigned i = 0, e = IVars.size(); i < e; i++) {
3930 if (IVars[i]->isBitField()) {
3931 ObjCIvarDecl *IV = IVars[i];
3932 Result += "\tstruct ";
3933 ObjCIvarBitfieldGroupType(IV, Result); Result += " ";
3934 ObjCIvarBitfieldGroupDecl(IV, Result); Result += ";\n";
3935 // skip over ivar bitfields in this group.
3936 SKIP_BITFIELDS(i , e, IVars){ while ((i < e) && IVars[i]->isBitField()) ++i
; if (i < e) --i; }
;
3937 }
3938 else
3939 RewriteObjCFieldDecl(IVars[i], Result);
3940 }
3941
3942 Result += "};\n";
3943 endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
3944 ReplaceText(LocStart, endBuf-startBuf, Result);
3945 // Mark this struct as having been generated.
3946 if (!ObjCSynthesizedStructs.insert(CDecl).second)
3947 llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct")::llvm::llvm_unreachable_internal("struct already synthesize- RewriteObjCInternalStruct"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 3947)
;
3948}
3949
3950/// RewriteIvarOffsetSymbols - Rewrite ivar offset symbols of those ivars which
3951/// have been referenced in an ivar access expression.
3952void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
3953 std::string &Result) {
3954 // write out ivar offset symbols which have been referenced in an ivar
3955 // access expression.
3956 llvm::SmallSetVector<ObjCIvarDecl *, 8> Ivars = ReferencedIvars[CDecl];
3957
3958 if (Ivars.empty())
3959 return;
3960
3961 llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
3962 for (ObjCIvarDecl *IvarDecl : Ivars) {
3963 const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
3964 unsigned GroupNo = 0;
3965 if (IvarDecl->isBitField()) {
3966 GroupNo = ObjCIvarBitfieldGroupNo(IvarDecl);
3967 if (GroupSymbolOutput.count(std::make_pair(IDecl, GroupNo)))
3968 continue;
3969 }
3970 Result += "\n";
3971 if (LangOpts.MicrosoftExt)
3972 Result += "__declspec(allocate(\".objc_ivar$B\")) ";
3973 Result += "extern \"C\" ";
3974 if (LangOpts.MicrosoftExt &&
3975 IvarDecl->getAccessControl() != ObjCIvarDecl::Private &&
3976 IvarDecl->getAccessControl() != ObjCIvarDecl::Package)
3977 Result += "__declspec(dllimport) ";
3978
3979 Result += "unsigned long ";
3980 if (IvarDecl->isBitField()) {
3981 ObjCIvarBitfieldGroupOffset(IvarDecl, Result);
3982 GroupSymbolOutput.insert(std::make_pair(IDecl, GroupNo));
3983 }
3984 else
3985 WriteInternalIvarName(CDecl, IvarDecl, Result);
3986 Result += ";";
3987 }
3988}
3989
3990//===----------------------------------------------------------------------===//
3991// Meta Data Emission
3992//===----------------------------------------------------------------------===//
3993
3994/// RewriteImplementations - This routine rewrites all method implementations
3995/// and emits meta-data.
3996
3997void RewriteModernObjC::RewriteImplementations() {
3998 int ClsDefCount = ClassImplementation.size();
3999 int CatDefCount = CategoryImplementation.size();
4000
4001 // Rewrite implemented methods
4002 for (int i = 0; i < ClsDefCount; i++) {
9
Loop condition is false. Execution continues on line 4011
4003 ObjCImplementationDecl *OIMP = ClassImplementation[i];
4004 ObjCInterfaceDecl *CDecl = OIMP->getClassInterface();
4005 if (CDecl->isImplicitInterfaceDecl())
4006 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4007, __PRETTY_FUNCTION__))
4007 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4007, __PRETTY_FUNCTION__))
;
4008 RewriteImplementationDecl(OIMP);
4009 }
4010
4011 for (int i = 0; i
9.1
'i' is < 'CatDefCount'
< CatDefCount; i++) {
10
Loop condition is true. Entering loop body
4012 ObjCCategoryImplDecl *CIMP = CategoryImplementation[i];
4013 ObjCInterfaceDecl *CDecl = CIMP->getClassInterface();
4014 if (CDecl->isImplicitInterfaceDecl())
11
Assuming the condition is false
12
Taking false branch
4015 assert(false &&((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4016, __PRETTY_FUNCTION__))
4016 "Legacy implicit interface rewriting not supported in moder abi")((false && "Legacy implicit interface rewriting not supported in moder abi"
) ? static_cast<void> (0) : __assert_fail ("false && \"Legacy implicit interface rewriting not supported in moder abi\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4016, __PRETTY_FUNCTION__))
;
4017 RewriteImplementationDecl(CIMP);
13
Calling 'RewriteModernObjC::RewriteImplementationDecl'
4018 }
4019}
4020
4021void RewriteModernObjC::RewriteByRefString(std::string &ResultStr,
4022 const std::string &Name,
4023 ValueDecl *VD, bool def) {
4024 assert(BlockByRefDeclNo.count(VD) &&((BlockByRefDeclNo.count(VD) && "RewriteByRefString: ByRef decl missing"
) ? static_cast<void> (0) : __assert_fail ("BlockByRefDeclNo.count(VD) && \"RewriteByRefString: ByRef decl missing\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4025, __PRETTY_FUNCTION__))
4025 "RewriteByRefString: ByRef decl missing")((BlockByRefDeclNo.count(VD) && "RewriteByRefString: ByRef decl missing"
) ? static_cast<void> (0) : __assert_fail ("BlockByRefDeclNo.count(VD) && \"RewriteByRefString: ByRef decl missing\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4025, __PRETTY_FUNCTION__))
;
4026 if (def)
4027 ResultStr += "struct ";
4028 ResultStr += "__Block_byref_" + Name +
4029 "_" + utostr(BlockByRefDeclNo[VD]) ;
4030}
4031
4032static bool HasLocalVariableExternalStorage(ValueDecl *VD) {
4033 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4034 return (Var->isFunctionOrMethodVarDecl() && !Var->hasLocalStorage());
4035 return false;
4036}
4037
4038std::string RewriteModernObjC::SynthesizeBlockFunc(BlockExpr *CE, int i,
4039 StringRef funcName,
4040 std::string Tag) {
4041 const FunctionType *AFT = CE->getFunctionType();
4042 QualType RT = AFT->getReturnType();
4043 std::string StructRef = "struct " + Tag;
4044 SourceLocation BlockLoc = CE->getExprLoc();
4045 std::string S;
4046 ConvertSourceLocationToLineDirective(BlockLoc, S);
4047
4048 S += "static " + RT.getAsString(Context->getPrintingPolicy()) + " __" +
4049 funcName.str() + "_block_func_" + utostr(i);
4050
4051 BlockDecl *BD = CE->getBlockDecl();
4052
4053 if (isa<FunctionNoProtoType>(AFT)) {
4054 // No user-supplied arguments. Still need to pass in a pointer to the
4055 // block (to reference imported block decl refs).
4056 S += "(" + StructRef + " *__cself)";
4057 } else if (BD->param_empty()) {
4058 S += "(" + StructRef + " *__cself)";
4059 } else {
4060 const FunctionProtoType *FT = cast<FunctionProtoType>(AFT);
4061 assert(FT && "SynthesizeBlockFunc: No function proto")((FT && "SynthesizeBlockFunc: No function proto") ? static_cast
<void> (0) : __assert_fail ("FT && \"SynthesizeBlockFunc: No function proto\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4061, __PRETTY_FUNCTION__))
;
4062 S += '(';
4063 // first add the implicit argument.
4064 S += StructRef + " *__cself, ";
4065 std::string ParamStr;
4066 for (BlockDecl::param_iterator AI = BD->param_begin(),
4067 E = BD->param_end(); AI != E; ++AI) {
4068 if (AI != BD->param_begin()) S += ", ";
4069 ParamStr = (*AI)->getNameAsString();
4070 QualType QT = (*AI)->getType();
4071 (void)convertBlockPointerToFunctionPointer(QT);
4072 QT.getAsStringInternal(ParamStr, Context->getPrintingPolicy());
4073 S += ParamStr;
4074 }
4075 if (FT->isVariadic()) {
4076 if (!BD->param_empty()) S += ", ";
4077 S += "...";
4078 }
4079 S += ')';
4080 }
4081 S += " {\n";
4082
4083 // Create local declarations to avoid rewriting all closure decl ref exprs.
4084 // First, emit a declaration for all "by ref" decls.
4085 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4086 E = BlockByRefDecls.end(); I != E; ++I) {
4087 S += " ";
4088 std::string Name = (*I)->getNameAsString();
4089 std::string TypeString;
4090 RewriteByRefString(TypeString, Name, (*I));
4091 TypeString += " *";
4092 Name = TypeString + Name;
4093 S += Name + " = __cself->" + (*I)->getNameAsString() + "; // bound by ref\n";
4094 }
4095 // Next, emit a declaration for all "by copy" declarations.
4096 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4097 E = BlockByCopyDecls.end(); I != E; ++I) {
4098 S += " ";
4099 // Handle nested closure invocation. For example:
4100 //
4101 // void (^myImportedClosure)(void);
4102 // myImportedClosure = ^(void) { setGlobalInt(x + y); };
4103 //
4104 // void (^anotherClosure)(void);
4105 // anotherClosure = ^(void) {
4106 // myImportedClosure(); // import and invoke the closure
4107 // };
4108 //
4109 if (isTopLevelBlockPointerType((*I)->getType())) {
4110 RewriteBlockPointerTypeVariable(S, (*I));
4111 S += " = (";
4112 RewriteBlockPointerType(S, (*I)->getType());
4113 S += ")";
4114 S += "__cself->" + (*I)->getNameAsString() + "; // bound by copy\n";
4115 }
4116 else {
4117 std::string Name = (*I)->getNameAsString();
4118 QualType QT = (*I)->getType();
4119 if (HasLocalVariableExternalStorage(*I))
4120 QT = Context->getPointerType(QT);
4121 QT.getAsStringInternal(Name, Context->getPrintingPolicy());
4122 S += Name + " = __cself->" +
4123 (*I)->getNameAsString() + "; // bound by copy\n";
4124 }
4125 }
4126 std::string RewrittenStr = RewrittenBlockExprs[CE];
4127 const char *cstr = RewrittenStr.c_str();
4128 while (*cstr++ != '{') ;
4129 S += cstr;
4130 S += "\n";
4131 return S;
4132}
4133
4134std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
4135 StringRef funcName,
4136 std::string Tag) {
4137 std::string StructRef = "struct " + Tag;
4138 std::string S = "static void __";
4139
4140 S += funcName;
4141 S += "_block_copy_" + utostr(i);
4142 S += "(" + StructRef;
4143 S += "*dst, " + StructRef;
4144 S += "*src) {";
4145 for (ValueDecl *VD : ImportedBlockDecls) {
4146 S += "_Block_object_assign((void*)&dst->";
4147 S += VD->getNameAsString();
4148 S += ", (void*)src->";
4149 S += VD->getNameAsString();
4150 if (BlockByRefDeclsPtrSet.count(VD))
4151 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4152 else if (VD->getType()->isBlockPointerType())
4153 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4154 else
4155 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4156 }
4157 S += "}\n";
4158
4159 S += "\nstatic void __";
4160 S += funcName;
4161 S += "_block_dispose_" + utostr(i);
4162 S += "(" + StructRef;
4163 S += "*src) {";
4164 for (ValueDecl *VD : ImportedBlockDecls) {
4165 S += "_Block_object_dispose((void*)src->";
4166 S += VD->getNameAsString();
4167 if (BlockByRefDeclsPtrSet.count(VD))
4168 S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
4169 else if (VD->getType()->isBlockPointerType())
4170 S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
4171 else
4172 S += ", " + utostr(BLOCK_FIELD_IS_OBJECT) + "/*BLOCK_FIELD_IS_OBJECT*/);";
4173 }
4174 S += "}\n";
4175 return S;
4176}
4177
4178std::string RewriteModernObjC::SynthesizeBlockImpl(BlockExpr *CE, std::string Tag,
4179 std::string Desc) {
4180 std::string S = "\nstruct " + Tag;
4181 std::string Constructor = " " + Tag;
4182
4183 S += " {\n struct __block_impl impl;\n";
4184 S += " struct " + Desc;
4185 S += "* Desc;\n";
4186
4187 Constructor += "(void *fp, "; // Invoke function pointer.
4188 Constructor += "struct " + Desc; // Descriptor pointer.
4189 Constructor += " *desc";
4190
4191 if (BlockDeclRefs.size()) {
4192 // Output all "by copy" declarations.
4193 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4194 E = BlockByCopyDecls.end(); I != E; ++I) {
4195 S += " ";
4196 std::string FieldName = (*I)->getNameAsString();
4197 std::string ArgName = "_" + FieldName;
4198 // Handle nested closure invocation. For example:
4199 //
4200 // void (^myImportedBlock)(void);
4201 // myImportedBlock = ^(void) { setGlobalInt(x + y); };
4202 //
4203 // void (^anotherBlock)(void);
4204 // anotherBlock = ^(void) {
4205 // myImportedBlock(); // import and invoke the closure
4206 // };
4207 //
4208 if (isTopLevelBlockPointerType((*I)->getType())) {
4209 S += "struct __block_impl *";
4210 Constructor += ", void *" + ArgName;
4211 } else {
4212 QualType QT = (*I)->getType();
4213 if (HasLocalVariableExternalStorage(*I))
4214 QT = Context->getPointerType(QT);
4215 QT.getAsStringInternal(FieldName, Context->getPrintingPolicy());
4216 QT.getAsStringInternal(ArgName, Context->getPrintingPolicy());
4217 Constructor += ", " + ArgName;
4218 }
4219 S += FieldName + ";\n";
4220 }
4221 // Output all "by ref" declarations.
4222 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4223 E = BlockByRefDecls.end(); I != E; ++I) {
4224 S += " ";
4225 std::string FieldName = (*I)->getNameAsString();
4226 std::string ArgName = "_" + FieldName;
4227 {
4228 std::string TypeString;
4229 RewriteByRefString(TypeString, FieldName, (*I));
4230 TypeString += " *";
4231 FieldName = TypeString + FieldName;
4232 ArgName = TypeString + ArgName;
4233 Constructor += ", " + ArgName;
4234 }
4235 S += FieldName + "; // by ref\n";
4236 }
4237 // Finish writing the constructor.
4238 Constructor += ", int flags=0)";
4239 // Initialize all "by copy" arguments.
4240 bool firsTime = true;
4241 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
4242 E = BlockByCopyDecls.end(); I != E; ++I) {
4243 std::string Name = (*I)->getNameAsString();
4244 if (firsTime) {
4245 Constructor += " : ";
4246 firsTime = false;
4247 }
4248 else
4249 Constructor += ", ";
4250 if (isTopLevelBlockPointerType((*I)->getType()))
4251 Constructor += Name + "((struct __block_impl *)_" + Name + ")";
4252 else
4253 Constructor += Name + "(_" + Name + ")";
4254 }
4255 // Initialize all "by ref" arguments.
4256 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
4257 E = BlockByRefDecls.end(); I != E; ++I) {
4258 std::string Name = (*I)->getNameAsString();
4259 if (firsTime) {
4260 Constructor += " : ";
4261 firsTime = false;
4262 }
4263 else
4264 Constructor += ", ";
4265 Constructor += Name + "(_" + Name + "->__forwarding)";
4266 }
4267
4268 Constructor += " {\n";
4269 if (GlobalVarDecl)
4270 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4271 else
4272 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4273 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4274
4275 Constructor += " Desc = desc;\n";
4276 } else {
4277 // Finish writing the constructor.
4278 Constructor += ", int flags=0) {\n";
4279 if (GlobalVarDecl)
4280 Constructor += " impl.isa = &_NSConcreteGlobalBlock;\n";
4281 else
4282 Constructor += " impl.isa = &_NSConcreteStackBlock;\n";
4283 Constructor += " impl.Flags = flags;\n impl.FuncPtr = fp;\n";
4284 Constructor += " Desc = desc;\n";
4285 }
4286 Constructor += " ";
4287 Constructor += "}\n";
4288 S += Constructor;
4289 S += "};\n";
4290 return S;
4291}
4292
4293std::string RewriteModernObjC::SynthesizeBlockDescriptor(std::string DescTag,
4294 std::string ImplTag, int i,
4295 StringRef FunName,
4296 unsigned hasCopy) {
4297 std::string S = "\nstatic struct " + DescTag;
4298
4299 S += " {\n size_t reserved;\n";
4300 S += " size_t Block_size;\n";
4301 if (hasCopy) {
4302 S += " void (*copy)(struct ";
4303 S += ImplTag; S += "*, struct ";
4304 S += ImplTag; S += "*);\n";
4305
4306 S += " void (*dispose)(struct ";
4307 S += ImplTag; S += "*);\n";
4308 }
4309 S += "} ";
4310
4311 S += DescTag + "_DATA = { 0, sizeof(struct ";
4312 S += ImplTag + ")";
4313 if (hasCopy) {
4314 S += ", __" + FunName.str() + "_block_copy_" + utostr(i);
4315 S += ", __" + FunName.str() + "_block_dispose_" + utostr(i);
4316 }
4317 S += "};\n";
4318 return S;
4319}
4320
4321void RewriteModernObjC::SynthesizeBlockLiterals(SourceLocation FunLocStart,
4322 StringRef FunName) {
4323 bool RewriteSC = (GlobalVarDecl &&
4324 !Blocks.empty() &&
4325 GlobalVarDecl->getStorageClass() == SC_Static &&
4326 GlobalVarDecl->getType().getCVRQualifiers());
4327 if (RewriteSC) {
4328 std::string SC(" void __");
4329 SC += GlobalVarDecl->getNameAsString();
4330 SC += "() {}";
4331 InsertText(FunLocStart, SC);
4332 }
4333
4334 // Insert closures that were part of the function.
4335 for (unsigned i = 0, count=0; i < Blocks.size(); i++) {
4336 CollectBlockDeclRefInfo(Blocks[i]);
4337 // Need to copy-in the inner copied-in variables not actually used in this
4338 // block.
4339 for (int j = 0; j < InnerDeclRefsCount[i]; j++) {
4340 DeclRefExpr *Exp = InnerDeclRefs[count++];
4341 ValueDecl *VD = Exp->getDecl();
4342 BlockDeclRefs.push_back(Exp);
4343 if (!VD->hasAttr<BlocksAttr>()) {
4344 if (!BlockByCopyDeclsPtrSet.count(VD)) {
4345 BlockByCopyDeclsPtrSet.insert(VD);
4346 BlockByCopyDecls.push_back(VD);
4347 }
4348 continue;
4349 }
4350
4351 if (!BlockByRefDeclsPtrSet.count(VD)) {
4352 BlockByRefDeclsPtrSet.insert(VD);
4353 BlockByRefDecls.push_back(VD);
4354 }
4355
4356 // imported objects in the inner blocks not used in the outer
4357 // blocks must be copied/disposed in the outer block as well.
4358 if (VD->getType()->isObjCObjectPointerType() ||
4359 VD->getType()->isBlockPointerType())
4360 ImportedBlockDecls.insert(VD);
4361 }
4362
4363 std::string ImplTag = "__" + FunName.str() + "_block_impl_" + utostr(i);
4364 std::string DescTag = "__" + FunName.str() + "_block_desc_" + utostr(i);
4365
4366 std::string CI = SynthesizeBlockImpl(Blocks[i], ImplTag, DescTag);
4367
4368 InsertText(FunLocStart, CI);
4369
4370 std::string CF = SynthesizeBlockFunc(Blocks[i], i, FunName, ImplTag);
4371
4372 InsertText(FunLocStart, CF);
4373
4374 if (ImportedBlockDecls.size()) {
4375 std::string HF = SynthesizeBlockHelperFuncs(Blocks[i], i, FunName, ImplTag);
4376 InsertText(FunLocStart, HF);
4377 }
4378 std::string BD = SynthesizeBlockDescriptor(DescTag, ImplTag, i, FunName,
4379 ImportedBlockDecls.size() > 0);
4380 InsertText(FunLocStart, BD);
4381
4382 BlockDeclRefs.clear();
4383 BlockByRefDecls.clear();
4384 BlockByRefDeclsPtrSet.clear();
4385 BlockByCopyDecls.clear();
4386 BlockByCopyDeclsPtrSet.clear();
4387 ImportedBlockDecls.clear();
4388 }
4389 if (RewriteSC) {
4390 // Must insert any 'const/volatile/static here. Since it has been
4391 // removed as result of rewriting of block literals.
4392 std::string SC;
4393 if (GlobalVarDecl->getStorageClass() == SC_Static)
4394 SC = "static ";
4395 if (GlobalVarDecl->getType().isConstQualified())
4396 SC += "const ";
4397 if (GlobalVarDecl->getType().isVolatileQualified())
4398 SC += "volatile ";
4399 if (GlobalVarDecl->getType().isRestrictQualified())
4400 SC += "restrict ";
4401 InsertText(FunLocStart, SC);
4402 }
4403 if (GlobalConstructionExp) {
4404 // extra fancy dance for global literal expression.
4405
4406 // Always the latest block expression on the block stack.
4407 std::string Tag = "__";
4408 Tag += FunName;
4409 Tag += "_block_impl_";
4410 Tag += utostr(Blocks.size()-1);
4411 std::string globalBuf = "static ";
4412 globalBuf += Tag; globalBuf += " ";
4413 std::string SStr;
4414
4415 llvm::raw_string_ostream constructorExprBuf(SStr);
4416 GlobalConstructionExp->printPretty(constructorExprBuf, nullptr,
4417 PrintingPolicy(LangOpts));
4418 globalBuf += constructorExprBuf.str();
4419 globalBuf += ";\n";
4420 InsertText(FunLocStart, globalBuf);
4421 GlobalConstructionExp = nullptr;
4422 }
4423
4424 Blocks.clear();
4425 InnerDeclRefsCount.clear();
4426 InnerDeclRefs.clear();
4427 RewrittenBlockExprs.clear();
4428}
4429
4430void RewriteModernObjC::InsertBlockLiteralsWithinFunction(FunctionDecl *FD) {
4431 SourceLocation FunLocStart =
4432 (!Blocks.empty()) ? getFunctionSourceLocation(*this, FD)
4433 : FD->getTypeSpecStartLoc();
4434 StringRef FuncName = FD->getName();
4435
4436 SynthesizeBlockLiterals(FunLocStart, FuncName);
4437}
4438
4439static void BuildUniqueMethodName(std::string &Name,
4440 ObjCMethodDecl *MD) {
4441 ObjCInterfaceDecl *IFace = MD->getClassInterface();
4442 Name = IFace->getName();
4443 Name += "__" + MD->getSelector().getAsString();
4444 // Convert colons to underscores.
4445 std::string::size_type loc = 0;
4446 while ((loc = Name.find(':', loc)) != std::string::npos)
4447 Name.replace(loc, 1, "_");
4448}
4449
4450void RewriteModernObjC::InsertBlockLiteralsWithinMethod(ObjCMethodDecl *MD) {
4451 // fprintf(stderr,"In InsertBlockLiteralsWitinMethod\n");
4452 // SourceLocation FunLocStart = MD->getBeginLoc();
4453 SourceLocation FunLocStart = MD->getBeginLoc();
4454 std::string FuncName;
4455 BuildUniqueMethodName(FuncName, MD);
4456 SynthesizeBlockLiterals(FunLocStart, FuncName);
4457}
4458
4459void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
4460 for (Stmt *SubStmt : S->children())
4461 if (SubStmt) {
4462 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt))
4463 GetBlockDeclRefExprs(CBE->getBody());
4464 else
4465 GetBlockDeclRefExprs(SubStmt);
4466 }
4467 // Handle specific things.
4468 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
4469 if (DRE->refersToEnclosingVariableOrCapture() ||
4470 HasLocalVariableExternalStorage(DRE->getDecl()))
4471 // FIXME: Handle enums.
4472 BlockDeclRefs.push_back(DRE);
4473}
4474
4475void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
4476 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
4477 llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
4478 for (Stmt *SubStmt : S->children())
4479 if (SubStmt) {
4480 if (BlockExpr *CBE = dyn_cast<BlockExpr>(SubStmt)) {
4481 InnerContexts.insert(cast<DeclContext>(CBE->getBlockDecl()));
4482 GetInnerBlockDeclRefExprs(CBE->getBody(),
4483 InnerBlockDeclRefs,
4484 InnerContexts);
4485 }
4486 else
4487 GetInnerBlockDeclRefExprs(SubStmt, InnerBlockDeclRefs, InnerContexts);
4488 }
4489 // Handle specific things.
4490 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
4491 if (DRE->refersToEnclosingVariableOrCapture() ||
4492 HasLocalVariableExternalStorage(DRE->getDecl())) {
4493 if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
4494 InnerBlockDeclRefs.push_back(DRE);
4495 if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
4496 if (Var->isFunctionOrMethodVarDecl())
4497 ImportedLocalExternalDecls.insert(Var);
4498 }
4499 }
4500}
4501
4502/// convertObjCTypeToCStyleType - This routine converts such objc types
4503/// as qualified objects, and blocks to their closest c/c++ types that
4504/// it can. It returns true if input type was modified.
4505bool RewriteModernObjC::convertObjCTypeToCStyleType(QualType &T) {
4506 QualType oldT = T;
4507 convertBlockPointerToFunctionPointer(T);
4508 if (T->isFunctionPointerType()) {
4509 QualType PointeeTy;
4510 if (const PointerType* PT = T->getAs<PointerType>()) {
4511 PointeeTy = PT->getPointeeType();
4512 if (const FunctionType *FT = PointeeTy->getAs<FunctionType>()) {
4513 T = convertFunctionTypeOfBlocks(FT);
4514 T = Context->getPointerType(T);
4515 }
4516 }
4517 }
4518
4519 convertToUnqualifiedObjCType(T);
4520 return T != oldT;
4521}
4522
4523/// convertFunctionTypeOfBlocks - This routine converts a function type
4524/// whose result type may be a block pointer or whose argument type(s)
4525/// might be block pointers to an equivalent function type replacing
4526/// all block pointers to function pointers.
4527QualType RewriteModernObjC::convertFunctionTypeOfBlocks(const FunctionType *FT) {
4528 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4529 // FTP will be null for closures that don't take arguments.
4530 // Generate a funky cast.
4531 SmallVector<QualType, 8> ArgTypes;
4532 QualType Res = FT->getReturnType();
4533 bool modified = convertObjCTypeToCStyleType(Res);
4534
4535 if (FTP) {
4536 for (auto &I : FTP->param_types()) {
4537 QualType t = I;
4538 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4539 if (convertObjCTypeToCStyleType(t))
4540 modified = true;
4541 ArgTypes.push_back(t);
4542 }
4543 }
4544 QualType FuncType;
4545 if (modified)
4546 FuncType = getSimpleFunctionType(Res, ArgTypes);
4547 else FuncType = QualType(FT, 0);
4548 return FuncType;
4549}
4550
4551Stmt *RewriteModernObjC::SynthesizeBlockCall(CallExpr *Exp, const Expr *BlockExp) {
4552 // Navigate to relevant type information.
4553 const BlockPointerType *CPT = nullptr;
4554
4555 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(BlockExp)) {
4556 CPT = DRE->getType()->getAs<BlockPointerType>();
4557 } else if (const MemberExpr *MExpr = dyn_cast<MemberExpr>(BlockExp)) {
4558 CPT = MExpr->getType()->getAs<BlockPointerType>();
4559 }
4560 else if (const ParenExpr *PRE = dyn_cast<ParenExpr>(BlockExp)) {
4561 return SynthesizeBlockCall(Exp, PRE->getSubExpr());
4562 }
4563 else if (const ImplicitCastExpr *IEXPR = dyn_cast<ImplicitCastExpr>(BlockExp))
4564 CPT = IEXPR->getType()->getAs<BlockPointerType>();
4565 else if (const ConditionalOperator *CEXPR =
4566 dyn_cast<ConditionalOperator>(BlockExp)) {
4567 Expr *LHSExp = CEXPR->getLHS();
4568 Stmt *LHSStmt = SynthesizeBlockCall(Exp, LHSExp);
4569 Expr *RHSExp = CEXPR->getRHS();
4570 Stmt *RHSStmt = SynthesizeBlockCall(Exp, RHSExp);
4571 Expr *CONDExp = CEXPR->getCond();
4572 ConditionalOperator *CondExpr =
4573 new (Context) ConditionalOperator(CONDExp,
4574 SourceLocation(), cast<Expr>(LHSStmt),
4575 SourceLocation(), cast<Expr>(RHSStmt),
4576 Exp->getType(), VK_RValue, OK_Ordinary);
4577 return CondExpr;
4578 } else if (const ObjCIvarRefExpr *IRE = dyn_cast<ObjCIvarRefExpr>(BlockExp)) {
4579 CPT = IRE->getType()->getAs<BlockPointerType>();
4580 } else if (const PseudoObjectExpr *POE
4581 = dyn_cast<PseudoObjectExpr>(BlockExp)) {
4582 CPT = POE->getType()->castAs<BlockPointerType>();
4583 } else {
4584 assert(false && "RewriteBlockClass: Bad type")((false && "RewriteBlockClass: Bad type") ? static_cast
<void> (0) : __assert_fail ("false && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4584, __PRETTY_FUNCTION__))
;
4585 }
4586 assert(CPT && "RewriteBlockClass: Bad type")((CPT && "RewriteBlockClass: Bad type") ? static_cast
<void> (0) : __assert_fail ("CPT && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4586, __PRETTY_FUNCTION__))
;
4587 const FunctionType *FT = CPT->getPointeeType()->getAs<FunctionType>();
4588 assert(FT && "RewriteBlockClass: Bad type")((FT && "RewriteBlockClass: Bad type") ? static_cast<
void> (0) : __assert_fail ("FT && \"RewriteBlockClass: Bad type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4588, __PRETTY_FUNCTION__))
;
4589 const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(FT);
4590 // FTP will be null for closures that don't take arguments.
4591
4592 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
4593 SourceLocation(), SourceLocation(),
4594 &Context->Idents.get("__block_impl"));
4595 QualType PtrBlock = Context->getPointerType(Context->getTagDeclType(RD));
4596
4597 // Generate a funky cast.
4598 SmallVector<QualType, 8> ArgTypes;
4599
4600 // Push the block argument type.
4601 ArgTypes.push_back(PtrBlock);
4602 if (FTP) {
4603 for (auto &I : FTP->param_types()) {
4604 QualType t = I;
4605 // Make sure we convert "t (^)(...)" to "t (*)(...)".
4606 if (!convertBlockPointerToFunctionPointer(t))
4607 convertToUnqualifiedObjCType(t);
4608 ArgTypes.push_back(t);
4609 }
4610 }
4611 // Now do the pointer to function cast.
4612 QualType PtrToFuncCastType = getSimpleFunctionType(Exp->getType(), ArgTypes);
4613
4614 PtrToFuncCastType = Context->getPointerType(PtrToFuncCastType);
4615
4616 CastExpr *BlkCast = NoTypeInfoCStyleCastExpr(Context, PtrBlock,
4617 CK_BitCast,
4618 const_cast<Expr*>(BlockExp));
4619 // Don't forget the parens to enforce the proper binding.
4620 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4621 BlkCast);
4622 //PE->dump();
4623
4624 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4625 SourceLocation(),
4626 &Context->Idents.get("FuncPtr"),
4627 Context->VoidPtrTy, nullptr,
4628 /*BitWidth=*/nullptr, /*Mutable=*/true,
4629 ICIS_NoInit);
4630 MemberExpr *ME = MemberExpr::CreateImplicit(
4631 *Context, PE, true, FD, FD->getType(), VK_LValue, OK_Ordinary);
4632
4633 CastExpr *FunkCast = NoTypeInfoCStyleCastExpr(Context, PtrToFuncCastType,
4634 CK_BitCast, ME);
4635 PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(), FunkCast);
4636
4637 SmallVector<Expr*, 8> BlkExprs;
4638 // Add the implicit argument.
4639 BlkExprs.push_back(BlkCast);
4640 // Add the user arguments.
4641 for (CallExpr::arg_iterator I = Exp->arg_begin(),
4642 E = Exp->arg_end(); I != E; ++I) {
4643 BlkExprs.push_back(*I);
4644 }
4645 CallExpr *CE = CallExpr::Create(*Context, PE, BlkExprs, Exp->getType(),
4646 VK_RValue, SourceLocation());
4647 return CE;
4648}
4649
4650// We need to return the rewritten expression to handle cases where the
4651// DeclRefExpr is embedded in another expression being rewritten.
4652// For example:
4653//
4654// int main() {
4655// __block Foo *f;
4656// __block int i;
4657//
4658// void (^myblock)() = ^() {
4659// [f test]; // f is a DeclRefExpr embedded in a message (which is being rewritten).
4660// i = 77;
4661// };
4662//}
4663Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
4664 // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR
4665 // for each DeclRefExp where BYREFVAR is name of the variable.
4666 ValueDecl *VD = DeclRefExp->getDecl();
4667 bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
4668 HasLocalVariableExternalStorage(DeclRefExp->getDecl());
4669
4670 FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
4671 SourceLocation(),
4672 &Context->Idents.get("__forwarding"),
4673 Context->VoidPtrTy, nullptr,
4674 /*BitWidth=*/nullptr, /*Mutable=*/true,
4675 ICIS_NoInit);
4676 MemberExpr *ME = MemberExpr::CreateImplicit(
4677 *Context, DeclRefExp, isArrow, FD, FD->getType(), VK_LValue, OK_Ordinary);
4678
4679 StringRef Name = VD->getName();
4680 FD = FieldDecl::Create(*Context, nullptr, SourceLocation(), SourceLocation(),
4681 &Context->Idents.get(Name),
4682 Context->VoidPtrTy, nullptr,
4683 /*BitWidth=*/nullptr, /*Mutable=*/true,
4684 ICIS_NoInit);
4685 ME = MemberExpr::CreateImplicit(*Context, ME, true, FD, DeclRefExp->getType(),
4686 VK_LValue, OK_Ordinary);
4687
4688 // Need parens to enforce precedence.
4689 ParenExpr *PE = new (Context) ParenExpr(DeclRefExp->getExprLoc(),
4690 DeclRefExp->getExprLoc(),
4691 ME);
4692 ReplaceStmt(DeclRefExp, PE);
4693 return PE;
4694}
4695
4696// Rewrites the imported local variable V with external storage
4697// (static, extern, etc.) as *V
4698//
4699Stmt *RewriteModernObjC::RewriteLocalVariableExternalStorage(DeclRefExpr *DRE) {
4700 ValueDecl *VD = DRE->getDecl();
4701 if (VarDecl *Var = dyn_cast<VarDecl>(VD))
4702 if (!ImportedLocalExternalDecls.count(Var))
4703 return DRE;
4704 Expr *Exp = new (Context) UnaryOperator(DRE, UO_Deref, DRE->getType(),
4705 VK_LValue, OK_Ordinary,
4706 DRE->getLocation(), false);
4707 // Need parens to enforce precedence.
4708 ParenExpr *PE = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
4709 Exp);
4710 ReplaceStmt(DRE, PE);
4711 return PE;
4712}
4713
4714void RewriteModernObjC::RewriteCastExpr(CStyleCastExpr *CE) {
4715 SourceLocation LocStart = CE->getLParenLoc();
4716 SourceLocation LocEnd = CE->getRParenLoc();
4717
4718 // Need to avoid trying to rewrite synthesized casts.
4719 if (LocStart.isInvalid())
4720 return;
4721 // Need to avoid trying to rewrite casts contained in macros.
4722 if (!Rewriter::isRewritable(LocStart) || !Rewriter::isRewritable(LocEnd))
4723 return;
4724
4725 const char *startBuf = SM->getCharacterData(LocStart);
4726 const char *endBuf = SM->getCharacterData(LocEnd);
4727 QualType QT = CE->getType();
4728 const Type* TypePtr = QT->getAs<Type>();
4729 if (isa<TypeOfExprType>(TypePtr)) {
4730 const TypeOfExprType *TypeOfExprTypePtr = cast<TypeOfExprType>(TypePtr);
4731 QT = TypeOfExprTypePtr->getUnderlyingExpr()->getType();
4732 std::string TypeAsString = "(";
4733 RewriteBlockPointerType(TypeAsString, QT);
4734 TypeAsString += ")";
4735 ReplaceText(LocStart, endBuf-startBuf+1, TypeAsString);
4736 return;
4737 }
4738 // advance the location to startArgList.
4739 const char *argPtr = startBuf;
4740
4741 while (*argPtr++ && (argPtr < endBuf)) {
4742 switch (*argPtr) {
4743 case '^':
4744 // Replace the '^' with '*'.
4745 LocStart = LocStart.getLocWithOffset(argPtr-startBuf);
4746 ReplaceText(LocStart, 1, "*");
4747 break;
4748 }
4749 }
4750}
4751
4752void RewriteModernObjC::RewriteImplicitCastObjCExpr(CastExpr *IC) {
4753 CastKind CastKind = IC->getCastKind();
4754 if (CastKind != CK_BlockPointerToObjCPointerCast &&
4755 CastKind != CK_AnyPointerToBlockPointerCast)
4756 return;
4757
4758 QualType QT = IC->getType();
4759 (void)convertBlockPointerToFunctionPointer(QT);
4760 std::string TypeString(QT.getAsString(Context->getPrintingPolicy()));
4761 std::string Str = "(";
4762 Str += TypeString;
4763 Str += ")";
4764 InsertText(IC->getSubExpr()->getBeginLoc(), Str);
4765}
4766
4767void RewriteModernObjC::RewriteBlockPointerFunctionArgs(FunctionDecl *FD) {
4768 SourceLocation DeclLoc = FD->getLocation();
4769 unsigned parenCount = 0;
4770
4771 // We have 1 or more arguments that have closure pointers.
4772 const char *startBuf = SM->getCharacterData(DeclLoc);
4773 const char *startArgList = strchr(startBuf, '(');
4774
4775 assert((*startArgList == '(') && "Rewriter fuzzy parser confused")(((*startArgList == '(') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*startArgList == '(') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4775, __PRETTY_FUNCTION__))
;
4776
4777 parenCount++;
4778 // advance the location to startArgList.
4779 DeclLoc = DeclLoc.getLocWithOffset(startArgList-startBuf);
4780 assert((DeclLoc.isValid()) && "Invalid DeclLoc")(((DeclLoc.isValid()) && "Invalid DeclLoc") ? static_cast
<void> (0) : __assert_fail ("(DeclLoc.isValid()) && \"Invalid DeclLoc\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4780, __PRETTY_FUNCTION__))
;
4781
4782 const char *argPtr = startArgList;
4783
4784 while (*argPtr++ && parenCount) {
4785 switch (*argPtr) {
4786 case '^':
4787 // Replace the '^' with '*'.
4788 DeclLoc = DeclLoc.getLocWithOffset(argPtr-startArgList);
4789 ReplaceText(DeclLoc, 1, "*");
4790 break;
4791 case '(':
4792 parenCount++;
4793 break;
4794 case ')':
4795 parenCount--;
4796 break;
4797 }
4798 }
4799}
4800
4801bool RewriteModernObjC::PointerTypeTakesAnyBlockArguments(QualType QT) {
4802 const FunctionProtoType *FTP;
4803 const PointerType *PT = QT->getAs<PointerType>();
4804 if (PT) {
4805 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4806 } else {
4807 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4808 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type")((BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"
) ? static_cast<void> (0) : __assert_fail ("BPT && \"BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4808, __PRETTY_FUNCTION__))
;
4809 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4810 }
4811 if (FTP) {
4812 for (const auto &I : FTP->param_types())
4813 if (isTopLevelBlockPointerType(I))
4814 return true;
4815 }
4816 return false;
4817}
4818
4819bool RewriteModernObjC::PointerTypeTakesAnyObjCQualifiedType(QualType QT) {
4820 const FunctionProtoType *FTP;
4821 const PointerType *PT = QT->getAs<PointerType>();
4822 if (PT) {
4823 FTP = PT->getPointeeType()->getAs<FunctionProtoType>();
4824 } else {
4825 const BlockPointerType *BPT = QT->getAs<BlockPointerType>();
4826 assert(BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type")((BPT && "BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type"
) ? static_cast<void> (0) : __assert_fail ("BPT && \"BlockPointerTypeTakeAnyBlockArguments(): not a block pointer type\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4826, __PRETTY_FUNCTION__))
;
4827 FTP = BPT->getPointeeType()->getAs<FunctionProtoType>();
4828 }
4829 if (FTP) {
4830 for (const auto &I : FTP->param_types()) {
4831 if (I->isObjCQualifiedIdType())
4832 return true;
4833 if (I->isObjCObjectPointerType() &&
4834 I->getPointeeType()->isObjCQualifiedInterfaceType())
4835 return true;
4836 }
4837
4838 }
4839 return false;
4840}
4841
4842void RewriteModernObjC::GetExtentOfArgList(const char *Name, const char *&LParen,
4843 const char *&RParen) {
4844 const char *argPtr = strchr(Name, '(');
4845 assert((*argPtr == '(') && "Rewriter fuzzy parser confused")(((*argPtr == '(') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*argPtr == '(') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4845, __PRETTY_FUNCTION__))
;
4846
4847 LParen = argPtr; // output the start.
4848 argPtr++; // skip past the left paren.
4849 unsigned parenCount = 1;
4850
4851 while (*argPtr && parenCount) {
4852 switch (*argPtr) {
4853 case '(': parenCount++; break;
4854 case ')': parenCount--; break;
4855 default: break;
4856 }
4857 if (parenCount) argPtr++;
4858 }
4859 assert((*argPtr == ')') && "Rewriter fuzzy parser confused")(((*argPtr == ')') && "Rewriter fuzzy parser confused"
) ? static_cast<void> (0) : __assert_fail ("(*argPtr == ')') && \"Rewriter fuzzy parser confused\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4859, __PRETTY_FUNCTION__))
;
4860 RParen = argPtr; // output the end
4861}
4862
4863void RewriteModernObjC::RewriteBlockPointerDecl(NamedDecl *ND) {
4864 if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
4865 RewriteBlockPointerFunctionArgs(FD);
4866 return;
4867 }
4868 // Handle Variables and Typedefs.
4869 SourceLocation DeclLoc = ND->getLocation();
4870 QualType DeclT;
4871 if (VarDecl *VD = dyn_cast<VarDecl>(ND))
4872 DeclT = VD->getType();
4873 else if (TypedefNameDecl *TDD = dyn_cast<TypedefNameDecl>(ND))
4874 DeclT = TDD->getUnderlyingType();
4875 else if (FieldDecl *FD = dyn_cast<FieldDecl>(ND))
4876 DeclT = FD->getType();
4877 else
4878 llvm_unreachable("RewriteBlockPointerDecl(): Decl type not yet handled")::llvm::llvm_unreachable_internal("RewriteBlockPointerDecl(): Decl type not yet handled"
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 4878)
;
4879
4880 const char *startBuf = SM->getCharacterData(DeclLoc);
4881 const char *endBuf = startBuf;
4882 // scan backward (from the decl location) for the end of the previous decl.
4883 while (*startBuf != '^' && *startBuf != ';' && startBuf != MainFileStart)
4884 startBuf--;
4885 SourceLocation Start = DeclLoc.getLocWithOffset(startBuf-endBuf);
4886 std::string buf;
4887 unsigned OrigLength=0;
4888 // *startBuf != '^' if we are dealing with a pointer to function that
4889 // may take block argument types (which will be handled below).
4890 if (*startBuf == '^') {
4891 // Replace the '^' with '*', computing a negative offset.
4892 buf = '*';
4893 startBuf++;
4894 OrigLength++;
4895 }
4896 while (*startBuf != ')') {
4897 buf += *startBuf;
4898 startBuf++;
4899 OrigLength++;
4900 }
4901 buf += ')';
4902 OrigLength++;
4903
4904 if (PointerTypeTakesAnyBlockArguments(DeclT) ||
4905 PointerTypeTakesAnyObjCQualifiedType(DeclT)) {
4906 // Replace the '^' with '*' for arguments.
4907 // Replace id<P> with id/*<>*/
4908 DeclLoc = ND->getLocation();
4909 startBuf = SM->getCharacterData(DeclLoc);
4910 const char *argListBegin, *argListEnd;
4911 GetExtentOfArgList(startBuf, argListBegin, argListEnd);
4912 while (argListBegin < argListEnd) {
4913 if (*argListBegin == '^')
4914 buf += '*';
4915 else if (*argListBegin == '<') {
4916 buf += "/*";
4917 buf += *argListBegin++;
4918 OrigLength++;
4919 while (*argListBegin != '>') {
4920 buf += *argListBegin++;
4921 OrigLength++;
4922 }
4923 buf += *argListBegin;
4924 buf += "*/";
4925 }
4926 else
4927 buf += *argListBegin;
4928 argListBegin++;
4929 OrigLength++;
4930 }
4931 buf += ')';
4932 OrigLength++;
4933 }
4934 ReplaceText(Start, OrigLength, buf);
4935}
4936
4937/// SynthesizeByrefCopyDestroyHelper - This routine synthesizes:
4938/// void __Block_byref_id_object_copy(struct Block_byref_id_object *dst,
4939/// struct Block_byref_id_object *src) {
4940/// _Block_object_assign (&_dest->object, _src->object,
4941/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4942/// [|BLOCK_FIELD_IS_WEAK]) // object
4943/// _Block_object_assign(&_dest->object, _src->object,
4944/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4945/// [|BLOCK_FIELD_IS_WEAK]) // block
4946/// }
4947/// And:
4948/// void __Block_byref_id_object_dispose(struct Block_byref_id_object *_src) {
4949/// _Block_object_dispose(_src->object,
4950/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_OBJECT
4951/// [|BLOCK_FIELD_IS_WEAK]) // object
4952/// _Block_object_dispose(_src->object,
4953/// BLOCK_BYREF_CALLER | BLOCK_FIELD_IS_BLOCK
4954/// [|BLOCK_FIELD_IS_WEAK]) // block
4955/// }
4956
4957std::string RewriteModernObjC::SynthesizeByrefCopyDestroyHelper(VarDecl *VD,
4958 int flag) {
4959 std::string S;
4960 if (CopyDestroyCache.count(flag))
4961 return S;
4962 CopyDestroyCache.insert(flag);
4963 S = "static void __Block_byref_id_object_copy_";
4964 S += utostr(flag);
4965 S += "(void *dst, void *src) {\n";
4966
4967 // offset into the object pointer is computed as:
4968 // void * + void* + int + int + void* + void *
4969 unsigned IntSize =
4970 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
4971 unsigned VoidPtrSize =
4972 static_cast<unsigned>(Context->getTypeSize(Context->VoidPtrTy));
4973
4974 unsigned offset = (VoidPtrSize*4 + IntSize + IntSize)/Context->getCharWidth();
4975 S += " _Block_object_assign((char*)dst + ";
4976 S += utostr(offset);
4977 S += ", *(void * *) ((char*)src + ";
4978 S += utostr(offset);
4979 S += "), ";
4980 S += utostr(flag);
4981 S += ");\n}\n";
4982
4983 S += "static void __Block_byref_id_object_dispose_";
4984 S += utostr(flag);
4985 S += "(void *src) {\n";
4986 S += " _Block_object_dispose(*(void * *) ((char*)src + ";
4987 S += utostr(offset);
4988 S += "), ";
4989 S += utostr(flag);
4990 S += ");\n}\n";
4991 return S;
4992}
4993
4994/// RewriteByRefVar - For each __block typex ND variable this routine transforms
4995/// the declaration into:
4996/// struct __Block_byref_ND {
4997/// void *__isa; // NULL for everything except __weak pointers
4998/// struct __Block_byref_ND *__forwarding;
4999/// int32_t __flags;
5000/// int32_t __size;
5001/// void *__Block_byref_id_object_copy; // If variable is __block ObjC object
5002/// void *__Block_byref_id_object_dispose; // If variable is __block ObjC object
5003/// typex ND;
5004/// };
5005///
5006/// It then replaces declaration of ND variable with:
5007/// struct __Block_byref_ND ND = {__isa=0B, __forwarding=&ND, __flags=some_flag,
5008/// __size=sizeof(struct __Block_byref_ND),
5009/// ND=initializer-if-any};
5010///
5011///
5012void RewriteModernObjC::RewriteByRefVar(VarDecl *ND, bool firstDecl,
5013 bool lastDecl) {
5014 int flag = 0;
5015 int isa = 0;
5016 SourceLocation DeclLoc = ND->getTypeSpecStartLoc();
5017 if (DeclLoc.isInvalid())
5018 // If type location is missing, it is because of missing type (a warning).
5019 // Use variable's location which is good for this case.
5020 DeclLoc = ND->getLocation();
5021 const char *startBuf = SM->getCharacterData(DeclLoc);
5022 SourceLocation X = ND->getEndLoc();
5023 X = SM->getExpansionLoc(X);
5024 const char *endBuf = SM->getCharacterData(X);
5025 std::string Name(ND->getNameAsString());
5026 std::string ByrefType;
5027 RewriteByRefString(ByrefType, Name, ND, true);
5028 ByrefType += " {\n";
5029 ByrefType += " void *__isa;\n";
5030 RewriteByRefString(ByrefType, Name, ND);
5031 ByrefType += " *__forwarding;\n";
5032 ByrefType += " int __flags;\n";
5033 ByrefType += " int __size;\n";
5034 // Add void *__Block_byref_id_object_copy;
5035 // void *__Block_byref_id_object_dispose; if needed.
5036 QualType Ty = ND->getType();
5037 bool HasCopyAndDispose = Context->BlockRequiresCopying(Ty, ND);
5038 if (HasCopyAndDispose) {
5039 ByrefType += " void (*__Block_byref_id_object_copy)(void*, void*);\n";
5040 ByrefType += " void (*__Block_byref_id_object_dispose)(void*);\n";
5041 }
5042
5043 QualType T = Ty;
5044 (void)convertBlockPointerToFunctionPointer(T);
5045 T.getAsStringInternal(Name, Context->getPrintingPolicy());
5046
5047 ByrefType += " " + Name + ";\n";
5048 ByrefType += "};\n";
5049 // Insert this type in global scope. It is needed by helper function.
5050 SourceLocation FunLocStart;
5051 if (CurFunctionDef)
5052 FunLocStart = getFunctionSourceLocation(*this, CurFunctionDef);
5053 else {
5054 assert(CurMethodDef && "RewriteByRefVar - CurMethodDef is null")((CurMethodDef && "RewriteByRefVar - CurMethodDef is null"
) ? static_cast<void> (0) : __assert_fail ("CurMethodDef && \"RewriteByRefVar - CurMethodDef is null\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5054, __PRETTY_FUNCTION__))
;
5055 FunLocStart = CurMethodDef->getBeginLoc();
5056 }
5057 InsertText(FunLocStart, ByrefType);
5058
5059 if (Ty.isObjCGCWeak()) {
5060 flag |= BLOCK_FIELD_IS_WEAK;
5061 isa = 1;
5062 }
5063 if (HasCopyAndDispose) {
5064 flag = BLOCK_BYREF_CALLER;
5065 QualType Ty = ND->getType();
5066 // FIXME. Handle __weak variable (BLOCK_FIELD_IS_WEAK) as well.
5067 if (Ty->isBlockPointerType())
5068 flag |= BLOCK_FIELD_IS_BLOCK;
5069 else
5070 flag |= BLOCK_FIELD_IS_OBJECT;
5071 std::string HF = SynthesizeByrefCopyDestroyHelper(ND, flag);
5072 if (!HF.empty())
5073 Preamble += HF;
5074 }
5075
5076 // struct __Block_byref_ND ND =
5077 // {0, &ND, some_flag, __size=sizeof(struct __Block_byref_ND),
5078 // initializer-if-any};
5079 bool hasInit = (ND->getInit() != nullptr);
5080 // FIXME. rewriter does not support __block c++ objects which
5081 // require construction.
5082 if (hasInit)
5083 if (CXXConstructExpr *CExp = dyn_cast<CXXConstructExpr>(ND->getInit())) {
5084 CXXConstructorDecl *CXXDecl = CExp->getConstructor();
5085 if (CXXDecl && CXXDecl->isDefaultConstructor())
5086 hasInit = false;
5087 }
5088
5089 unsigned flags = 0;
5090 if (HasCopyAndDispose)
5091 flags |= BLOCK_HAS_COPY_DISPOSE;
5092 Name = ND->getNameAsString();
5093 ByrefType.clear();
5094 RewriteByRefString(ByrefType, Name, ND);
5095 std::string ForwardingCastType("(");
5096 ForwardingCastType += ByrefType + " *)";
5097 ByrefType += " " + Name + " = {(void*)";
5098 ByrefType += utostr(isa);
5099 ByrefType += "," + ForwardingCastType + "&" + Name + ", ";
5100 ByrefType += utostr(flags);
5101 ByrefType += ", ";
5102 ByrefType += "sizeof(";
5103 RewriteByRefString(ByrefType, Name, ND);
5104 ByrefType += ")";
5105 if (HasCopyAndDispose) {
5106 ByrefType += ", __Block_byref_id_object_copy_";
5107 ByrefType += utostr(flag);
5108 ByrefType += ", __Block_byref_id_object_dispose_";
5109 ByrefType += utostr(flag);
5110 }
5111
5112 if (!firstDecl) {
5113 // In multiple __block declarations, and for all but 1st declaration,
5114 // find location of the separating comma. This would be start location
5115 // where new text is to be inserted.
5116 DeclLoc = ND->getLocation();
5117 const char *startDeclBuf = SM->getCharacterData(DeclLoc);
5118 const char *commaBuf = startDeclBuf;
5119 while (*commaBuf != ',')
5120 commaBuf--;
5121 assert((*commaBuf == ',') && "RewriteByRefVar: can't find ','")(((*commaBuf == ',') && "RewriteByRefVar: can't find ','"
) ? static_cast<void> (0) : __assert_fail ("(*commaBuf == ',') && \"RewriteByRefVar: can't find ','\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5121, __PRETTY_FUNCTION__))
;
5122 DeclLoc = DeclLoc.getLocWithOffset(commaBuf - startDeclBuf);
5123 startBuf = commaBuf;
5124 }
5125
5126 if (!hasInit) {
5127 ByrefType += "};\n";
5128 unsigned nameSize = Name.size();
5129 // for block or function pointer declaration. Name is already
5130 // part of the declaration.
5131 if (Ty->isBlockPointerType() || Ty->isFunctionPointerType())
5132 nameSize = 1;
5133 ReplaceText(DeclLoc, endBuf-startBuf+nameSize, ByrefType);
5134 }
5135 else {
5136 ByrefType += ", ";
5137 SourceLocation startLoc;
5138 Expr *E = ND->getInit();
5139 if (const CStyleCastExpr *ECE = dyn_cast<CStyleCastExpr>(E))
5140 startLoc = ECE->getLParenLoc();
5141 else
5142 startLoc = E->getBeginLoc();
5143 startLoc = SM->getExpansionLoc(startLoc);
5144 endBuf = SM->getCharacterData(startLoc);
5145 ReplaceText(DeclLoc, endBuf-startBuf, ByrefType);
5146
5147 const char separator = lastDecl ? ';' : ',';
5148 const char *startInitializerBuf = SM->getCharacterData(startLoc);
5149 const char *separatorBuf = strchr(startInitializerBuf, separator);
5150 assert((*separatorBuf == separator) &&(((*separatorBuf == separator) && "RewriteByRefVar: can't find ';' or ','"
) ? static_cast<void> (0) : __assert_fail ("(*separatorBuf == separator) && \"RewriteByRefVar: can't find ';' or ','\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5151, __PRETTY_FUNCTION__))
5151 "RewriteByRefVar: can't find ';' or ','")(((*separatorBuf == separator) && "RewriteByRefVar: can't find ';' or ','"
) ? static_cast<void> (0) : __assert_fail ("(*separatorBuf == separator) && \"RewriteByRefVar: can't find ';' or ','\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5151, __PRETTY_FUNCTION__))
;
5152 SourceLocation separatorLoc =
5153 startLoc.getLocWithOffset(separatorBuf-startInitializerBuf);
5154
5155 InsertText(separatorLoc, lastDecl ? "}" : "};\n");
5156 }
5157}
5158
5159void RewriteModernObjC::CollectBlockDeclRefInfo(BlockExpr *Exp) {
5160 // Add initializers for any closure decl refs.
5161 GetBlockDeclRefExprs(Exp->getBody());
5162 if (BlockDeclRefs.size()) {
5163 // Unique all "by copy" declarations.
5164 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5165 if (!BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5166 if (!BlockByCopyDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5167 BlockByCopyDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5168 BlockByCopyDecls.push_back(BlockDeclRefs[i]->getDecl());
5169 }
5170 }
5171 // Unique all "by ref" declarations.
5172 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5173 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>()) {
5174 if (!BlockByRefDeclsPtrSet.count(BlockDeclRefs[i]->getDecl())) {
5175 BlockByRefDeclsPtrSet.insert(BlockDeclRefs[i]->getDecl());
5176 BlockByRefDecls.push_back(BlockDeclRefs[i]->getDecl());
5177 }
5178 }
5179 // Find any imported blocks...they will need special attention.
5180 for (unsigned i = 0; i < BlockDeclRefs.size(); i++)
5181 if (BlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5182 BlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5183 BlockDeclRefs[i]->getType()->isBlockPointerType())
5184 ImportedBlockDecls.insert(BlockDeclRefs[i]->getDecl());
5185 }
5186}
5187
5188FunctionDecl *RewriteModernObjC::SynthBlockInitFunctionDecl(StringRef name) {
5189 IdentifierInfo *ID = &Context->Idents.get(name);
5190 QualType FType = Context->getFunctionNoProtoType(Context->VoidPtrTy);
5191 return FunctionDecl::Create(*Context, TUDecl, SourceLocation(),
5192 SourceLocation(), ID, FType, nullptr, SC_Extern,
5193 false, false);
5194}
5195
5196Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
5197 const SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs) {
5198 const BlockDecl *block = Exp->getBlockDecl();
5199
5200 Blocks.push_back(Exp);
5201
5202 CollectBlockDeclRefInfo(Exp);
5203
5204 // Add inner imported variables now used in current block.
5205 int countOfInnerDecls = 0;
5206 if (!InnerBlockDeclRefs.empty()) {
5207 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++) {
5208 DeclRefExpr *Exp = InnerBlockDeclRefs[i];
5209 ValueDecl *VD = Exp->getDecl();
5210 if (!VD->hasAttr<BlocksAttr>() && !BlockByCopyDeclsPtrSet.count(VD)) {
5211 // We need to save the copied-in variables in nested
5212 // blocks because it is needed at the end for some of the API generations.
5213 // See SynthesizeBlockLiterals routine.
5214 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5215 BlockDeclRefs.push_back(Exp);
5216 BlockByCopyDeclsPtrSet.insert(VD);
5217 BlockByCopyDecls.push_back(VD);
5218 }
5219 if (VD->hasAttr<BlocksAttr>() && !BlockByRefDeclsPtrSet.count(VD)) {
5220 InnerDeclRefs.push_back(Exp); countOfInnerDecls++;
5221 BlockDeclRefs.push_back(Exp);
5222 BlockByRefDeclsPtrSet.insert(VD);
5223 BlockByRefDecls.push_back(VD);
5224 }
5225 }
5226 // Find any imported blocks...they will need special attention.
5227 for (unsigned i = 0; i < InnerBlockDeclRefs.size(); i++)
5228 if (InnerBlockDeclRefs[i]->getDecl()->hasAttr<BlocksAttr>() ||
5229 InnerBlockDeclRefs[i]->getType()->isObjCObjectPointerType() ||
5230 InnerBlockDeclRefs[i]->getType()->isBlockPointerType())
5231 ImportedBlockDecls.insert(InnerBlockDeclRefs[i]->getDecl());
5232 }
5233 InnerDeclRefsCount.push_back(countOfInnerDecls);
5234
5235 std::string FuncName;
5236
5237 if (CurFunctionDef)
5238 FuncName = CurFunctionDef->getNameAsString();
5239 else if (CurMethodDef)
5240 BuildUniqueMethodName(FuncName, CurMethodDef);
5241 else if (GlobalVarDecl)
5242 FuncName = std::string(GlobalVarDecl->getNameAsString());
5243
5244 bool GlobalBlockExpr =
5245 block->getDeclContext()->getRedeclContext()->isFileContext();
5246
5247 if (GlobalBlockExpr && !GlobalVarDecl) {
5248 Diags.Report(block->getLocation(), GlobalBlockRewriteFailedDiag);
5249 GlobalBlockExpr = false;
5250 }
5251
5252 std::string BlockNumber = utostr(Blocks.size()-1);
5253
5254 std::string Func = "__" + FuncName + "_block_func_" + BlockNumber;
5255
5256 // Get a pointer to the function type so we can cast appropriately.
5257 QualType BFT = convertFunctionTypeOfBlocks(Exp->getFunctionType());
5258 QualType FType = Context->getPointerType(BFT);
5259
5260 FunctionDecl *FD;
5261 Expr *NewRep;
5262
5263 // Simulate a constructor call...
5264 std::string Tag;
5265
5266 if (GlobalBlockExpr)
5267 Tag = "__global_";
5268 else
5269 Tag = "__";
5270 Tag += FuncName + "_block_impl_" + BlockNumber;
5271
5272 FD = SynthBlockInitFunctionDecl(Tag);
5273 DeclRefExpr *DRE = new (Context)
5274 DeclRefExpr(*Context, FD, false, FType, VK_RValue, SourceLocation());
5275
5276 SmallVector<Expr*, 4> InitExprs;
5277
5278 // Initialize the block function.
5279 FD = SynthBlockInitFunctionDecl(Func);
5280 DeclRefExpr *Arg = new (Context) DeclRefExpr(
5281 *Context, FD, false, FD->getType(), VK_LValue, SourceLocation());
5282 CastExpr *castExpr = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5283 CK_BitCast, Arg);
5284 InitExprs.push_back(castExpr);
5285
5286 // Initialize the block descriptor.
5287 std::string DescData = "__" + FuncName + "_block_desc_" + BlockNumber + "_DATA";
5288
5289 VarDecl *NewVD = VarDecl::Create(
5290 *Context, TUDecl, SourceLocation(), SourceLocation(),
5291 &Context->Idents.get(DescData), Context->VoidPtrTy, nullptr, SC_Static);
5292 UnaryOperator *DescRefExpr = new (Context) UnaryOperator(
5293 new (Context) DeclRefExpr(*Context, NewVD, false, Context->VoidPtrTy,
5294 VK_LValue, SourceLocation()),
5295 UO_AddrOf, Context->getPointerType(Context->VoidPtrTy), VK_RValue,
5296 OK_Ordinary, SourceLocation(), false);
5297 InitExprs.push_back(DescRefExpr);
5298
5299 // Add initializers for any closure decl refs.
5300 if (BlockDeclRefs.size()) {
5301 Expr *Exp;
5302 // Output all "by copy" declarations.
5303 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByCopyDecls.begin(),
5304 E = BlockByCopyDecls.end(); I != E; ++I) {
5305 if (isObjCType((*I)->getType())) {
5306 // FIXME: Conform to ABI ([[obj retain] autorelease]).
5307 FD = SynthBlockInitFunctionDecl((*I)->getName());
5308 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5309 VK_LValue, SourceLocation());
5310 if (HasLocalVariableExternalStorage(*I)) {
5311 QualType QT = (*I)->getType();
5312 QT = Context->getPointerType(QT);
5313 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5314 OK_Ordinary, SourceLocation(),
5315 false);
5316 }
5317 } else if (isTopLevelBlockPointerType((*I)->getType())) {
5318 FD = SynthBlockInitFunctionDecl((*I)->getName());
5319 Arg = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5320 VK_LValue, SourceLocation());
5321 Exp = NoTypeInfoCStyleCastExpr(Context, Context->VoidPtrTy,
5322 CK_BitCast, Arg);
5323 } else {
5324 FD = SynthBlockInitFunctionDecl((*I)->getName());
5325 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5326 VK_LValue, SourceLocation());
5327 if (HasLocalVariableExternalStorage(*I)) {
5328 QualType QT = (*I)->getType();
5329 QT = Context->getPointerType(QT);
5330 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf, QT, VK_RValue,
5331 OK_Ordinary, SourceLocation(),
5332 false);
5333 }
5334
5335 }
5336 InitExprs.push_back(Exp);
5337 }
5338 // Output all "by ref" declarations.
5339 for (SmallVectorImpl<ValueDecl *>::iterator I = BlockByRefDecls.begin(),
5340 E = BlockByRefDecls.end(); I != E; ++I) {
5341 ValueDecl *ND = (*I);
5342 std::string Name(ND->getNameAsString());
5343 std::string RecName;
5344 RewriteByRefString(RecName, Name, ND, true);
5345 IdentifierInfo *II = &Context->Idents.get(RecName.c_str()
5346 + sizeof("struct"));
5347 RecordDecl *RD = RecordDecl::Create(*Context, TTK_Struct, TUDecl,
5348 SourceLocation(), SourceLocation(),
5349 II);
5350 assert(RD && "SynthBlockInitExpr(): Can't find RecordDecl")((RD && "SynthBlockInitExpr(): Can't find RecordDecl"
) ? static_cast<void> (0) : __assert_fail ("RD && \"SynthBlockInitExpr(): Can't find RecordDecl\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5350, __PRETTY_FUNCTION__))
;
5351 QualType castT = Context->getPointerType(Context->getTagDeclType(RD));
5352
5353 FD = SynthBlockInitFunctionDecl((*I)->getName());
5354 Exp = new (Context) DeclRefExpr(*Context, FD, false, FD->getType(),
5355 VK_LValue, SourceLocation());
5356 bool isNestedCapturedVar = false;
5357 if (block)
5358 for (const auto &CI : block->captures()) {
5359 const VarDecl *variable = CI.getVariable();
5360 if (variable == ND && CI.isNested()) {
5361 assert (CI.isByRef() &&((CI.isByRef() && "SynthBlockInitExpr - captured block variable is not byref"
) ? static_cast<void> (0) : __assert_fail ("CI.isByRef() && \"SynthBlockInitExpr - captured block variable is not byref\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5362, __PRETTY_FUNCTION__))
5362 "SynthBlockInitExpr - captured block variable is not byref")((CI.isByRef() && "SynthBlockInitExpr - captured block variable is not byref"
) ? static_cast<void> (0) : __assert_fail ("CI.isByRef() && \"SynthBlockInitExpr - captured block variable is not byref\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5362, __PRETTY_FUNCTION__))
;
5363 isNestedCapturedVar = true;
5364 break;
5365 }
5366 }
5367 // captured nested byref variable has its address passed. Do not take
5368 // its address again.
5369 if (!isNestedCapturedVar)
5370 Exp = new (Context) UnaryOperator(Exp, UO_AddrOf,
5371 Context->getPointerType(Exp->getType()),
5372 VK_RValue, OK_Ordinary, SourceLocation(),
5373 false);
5374 Exp = NoTypeInfoCStyleCastExpr(Context, castT, CK_BitCast, Exp);
5375 InitExprs.push_back(Exp);
5376 }
5377 }
5378 if (ImportedBlockDecls.size()) {
5379 // generate BLOCK_HAS_COPY_DISPOSE(have helper funcs) | BLOCK_HAS_DESCRIPTOR
5380 int flag = (BLOCK_HAS_COPY_DISPOSE | BLOCK_HAS_DESCRIPTOR);
5381 unsigned IntSize =
5382 static_cast<unsigned>(Context->getTypeSize(Context->IntTy));
5383 Expr *FlagExp = IntegerLiteral::Create(*Context, llvm::APInt(IntSize, flag),
5384 Context->IntTy, SourceLocation());
5385 InitExprs.push_back(FlagExp);
5386 }
5387 NewRep = CallExpr::Create(*Context, DRE, InitExprs, FType, VK_LValue,
5388 SourceLocation());
5389
5390 if (GlobalBlockExpr) {
5391 assert (!GlobalConstructionExp &&((!GlobalConstructionExp && "SynthBlockInitExpr - GlobalConstructionExp must be null"
) ? static_cast<void> (0) : __assert_fail ("!GlobalConstructionExp && \"SynthBlockInitExpr - GlobalConstructionExp must be null\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5392, __PRETTY_FUNCTION__))
5392 "SynthBlockInitExpr - GlobalConstructionExp must be null")((!GlobalConstructionExp && "SynthBlockInitExpr - GlobalConstructionExp must be null"
) ? static_cast<void> (0) : __assert_fail ("!GlobalConstructionExp && \"SynthBlockInitExpr - GlobalConstructionExp must be null\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5392, __PRETTY_FUNCTION__))
;
5393 GlobalConstructionExp = NewRep;
5394 NewRep = DRE;
5395 }
5396
5397 NewRep = new (Context) UnaryOperator(NewRep, UO_AddrOf,
5398 Context->getPointerType(NewRep->getType()),
5399 VK_RValue, OK_Ordinary, SourceLocation(), false);
5400 NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
5401 NewRep);
5402 // Put Paren around the call.
5403 NewRep = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
5404 NewRep);
5405
5406 BlockDeclRefs.clear();
5407 BlockByRefDecls.clear();
5408 BlockByRefDeclsPtrSet.clear();
5409 BlockByCopyDecls.clear();
5410 BlockByCopyDeclsPtrSet.clear();
5411 ImportedBlockDecls.clear();
5412 return NewRep;
5413}
5414
5415bool RewriteModernObjC::IsDeclStmtInForeachHeader(DeclStmt *DS) {
5416 if (const ObjCForCollectionStmt * CS =
5417 dyn_cast<ObjCForCollectionStmt>(Stmts.back()))
5418 return CS->getElement() == DS;
5419 return false;
5420}
5421
5422//===----------------------------------------------------------------------===//
5423// Function Body / Expression rewriting
5424//===----------------------------------------------------------------------===//
5425
5426Stmt *RewriteModernObjC::RewriteFunctionBodyOrGlobalInitializer(Stmt *S) {
5427 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5428 isa<DoStmt>(S) || isa<ForStmt>(S))
5429 Stmts.push_back(S);
5430 else if (isa<ObjCForCollectionStmt>(S)) {
5431 Stmts.push_back(S);
5432 ObjCBcLabelNo.push_back(++BcLabelCount);
5433 }
5434
5435 // Pseudo-object operations and ivar references need special
5436 // treatment because we're going to recursively rewrite them.
5437 if (PseudoObjectExpr *PseudoOp = dyn_cast<PseudoObjectExpr>(S)) {
5438 if (isa<BinaryOperator>(PseudoOp->getSyntacticForm())) {
5439 return RewritePropertyOrImplicitSetter(PseudoOp);
5440 } else {
5441 return RewritePropertyOrImplicitGetter(PseudoOp);
5442 }
5443 } else if (ObjCIvarRefExpr *IvarRefExpr = dyn_cast<ObjCIvarRefExpr>(S)) {
5444 return RewriteObjCIvarRefExpr(IvarRefExpr);
5445 }
5446 else if (isa<OpaqueValueExpr>(S))
5447 S = cast<OpaqueValueExpr>(S)->getSourceExpr();
5448
5449 SourceRange OrigStmtRange = S->getSourceRange();
5450
5451 // Perform a bottom up rewrite of all children.
5452 for (Stmt *&childStmt : S->children())
5453 if (childStmt) {
5454 Stmt *newStmt = RewriteFunctionBodyOrGlobalInitializer(childStmt);
5455 if (newStmt) {
5456 childStmt = newStmt;
5457 }
5458 }
5459
5460 if (BlockExpr *BE = dyn_cast<BlockExpr>(S)) {
5461 SmallVector<DeclRefExpr *, 8> InnerBlockDeclRefs;
5462 llvm::SmallPtrSet<const DeclContext *, 8> InnerContexts;
5463 InnerContexts.insert(BE->getBlockDecl());
5464 ImportedLocalExternalDecls.clear();
5465 GetInnerBlockDeclRefExprs(BE->getBody(),
5466 InnerBlockDeclRefs, InnerContexts);
5467 // Rewrite the block body in place.
5468 Stmt *SaveCurrentBody = CurrentBody;
5469 CurrentBody = BE->getBody();
5470 PropParentMap = nullptr;
5471 // block literal on rhs of a property-dot-sytax assignment
5472 // must be replaced by its synthesize ast so getRewrittenText
5473 // works as expected. In this case, what actually ends up on RHS
5474 // is the blockTranscribed which is the helper function for the
5475 // block literal; as in: self.c = ^() {[ace ARR];};
5476 bool saveDisableReplaceStmt = DisableReplaceStmt;
5477 DisableReplaceStmt = false;
5478 RewriteFunctionBodyOrGlobalInitializer(BE->getBody());
5479 DisableReplaceStmt = saveDisableReplaceStmt;
5480 CurrentBody = SaveCurrentBody;
5481 PropParentMap = nullptr;
5482 ImportedLocalExternalDecls.clear();
5483 // Now we snarf the rewritten text and stash it away for later use.
5484 std::string Str = Rewrite.getRewrittenText(BE->getSourceRange());
5485 RewrittenBlockExprs[BE] = Str;
5486
5487 Stmt *blockTranscribed = SynthBlockInitExpr(BE, InnerBlockDeclRefs);
5488
5489 //blockTranscribed->dump();
5490 ReplaceStmt(S, blockTranscribed);
5491 return blockTranscribed;
5492 }
5493 // Handle specific things.
5494 if (ObjCEncodeExpr *AtEncode = dyn_cast<ObjCEncodeExpr>(S))
5495 return RewriteAtEncode(AtEncode);
5496
5497 if (ObjCSelectorExpr *AtSelector = dyn_cast<ObjCSelectorExpr>(S))
5498 return RewriteAtSelector(AtSelector);
5499
5500 if (ObjCStringLiteral *AtString = dyn_cast<ObjCStringLiteral>(S))
5501 return RewriteObjCStringLiteral(AtString);
5502
5503 if (ObjCBoolLiteralExpr *BoolLitExpr = dyn_cast<ObjCBoolLiteralExpr>(S))
5504 return RewriteObjCBoolLiteralExpr(BoolLitExpr);
5505
5506 if (ObjCBoxedExpr *BoxedExpr = dyn_cast<ObjCBoxedExpr>(S))
5507 return RewriteObjCBoxedExpr(BoxedExpr);
5508
5509 if (ObjCArrayLiteral *ArrayLitExpr = dyn_cast<ObjCArrayLiteral>(S))
5510 return RewriteObjCArrayLiteralExpr(ArrayLitExpr);
5511
5512 if (ObjCDictionaryLiteral *DictionaryLitExpr =
5513 dyn_cast<ObjCDictionaryLiteral>(S))
5514 return RewriteObjCDictionaryLiteralExpr(DictionaryLitExpr);
5515
5516 if (ObjCMessageExpr *MessExpr = dyn_cast<ObjCMessageExpr>(S)) {
5517#if 0
5518 // Before we rewrite it, put the original message expression in a comment.
5519 SourceLocation startLoc = MessExpr->getBeginLoc();
5520 SourceLocation endLoc = MessExpr->getEndLoc();
5521
5522 const char *startBuf = SM->getCharacterData(startLoc);
5523 const char *endBuf = SM->getCharacterData(endLoc);
5524
5525 std::string messString;
5526 messString += "// ";
5527 messString.append(startBuf, endBuf-startBuf+1);
5528 messString += "\n";
5529
5530 // FIXME: Missing definition of
5531 // InsertText(clang::SourceLocation, char const*, unsigned int).
5532 // InsertText(startLoc, messString);
5533 // Tried this, but it didn't work either...
5534 // ReplaceText(startLoc, 0, messString.c_str(), messString.size());
5535#endif
5536 return RewriteMessageExpr(MessExpr);
5537 }
5538
5539 if (ObjCAutoreleasePoolStmt *StmtAutoRelease =
5540 dyn_cast<ObjCAutoreleasePoolStmt>(S)) {
5541 return RewriteObjCAutoreleasePoolStmt(StmtAutoRelease);
5542 }
5543
5544 if (ObjCAtTryStmt *StmtTry = dyn_cast<ObjCAtTryStmt>(S))
5545 return RewriteObjCTryStmt(StmtTry);
5546
5547 if (ObjCAtSynchronizedStmt *StmtTry = dyn_cast<ObjCAtSynchronizedStmt>(S))
5548 return RewriteObjCSynchronizedStmt(StmtTry);
5549
5550 if (ObjCAtThrowStmt *StmtThrow = dyn_cast<ObjCAtThrowStmt>(S))
5551 return RewriteObjCThrowStmt(StmtThrow);
5552
5553 if (ObjCProtocolExpr *ProtocolExp = dyn_cast<ObjCProtocolExpr>(S))
5554 return RewriteObjCProtocolExpr(ProtocolExp);
5555
5556 if (ObjCForCollectionStmt *StmtForCollection =
5557 dyn_cast<ObjCForCollectionStmt>(S))
5558 return RewriteObjCForCollectionStmt(StmtForCollection,
5559 OrigStmtRange.getEnd());
5560 if (BreakStmt *StmtBreakStmt =
5561 dyn_cast<BreakStmt>(S))
5562 return RewriteBreakStmt(StmtBreakStmt);
5563 if (ContinueStmt *StmtContinueStmt =
5564 dyn_cast<ContinueStmt>(S))
5565 return RewriteContinueStmt(StmtContinueStmt);
5566
5567 // Need to check for protocol refs (id <P>, Foo <P> *) in variable decls
5568 // and cast exprs.
5569 if (DeclStmt *DS = dyn_cast<DeclStmt>(S)) {
5570 // FIXME: What we're doing here is modifying the type-specifier that
5571 // precedes the first Decl. In the future the DeclGroup should have
5572 // a separate type-specifier that we can rewrite.
5573 // NOTE: We need to avoid rewriting the DeclStmt if it is within
5574 // the context of an ObjCForCollectionStmt. For example:
5575 // NSArray *someArray;
5576 // for (id <FooProtocol> index in someArray) ;
5577 // This is because RewriteObjCForCollectionStmt() does textual rewriting
5578 // and it depends on the original text locations/positions.
5579 if (Stmts.empty() || !IsDeclStmtInForeachHeader(DS))
5580 RewriteObjCQualifiedInterfaceTypes(*DS->decl_begin());
5581
5582 // Blocks rewrite rules.
5583 for (DeclStmt::decl_iterator DI = DS->decl_begin(), DE = DS->decl_end();
5584 DI != DE; ++DI) {
5585 Decl *SD = *DI;
5586 if (ValueDecl *ND = dyn_cast<ValueDecl>(SD)) {
5587 if (isTopLevelBlockPointerType(ND->getType()))
5588 RewriteBlockPointerDecl(ND);
5589 else if (ND->getType()->isFunctionPointerType())
5590 CheckFunctionPointerDecl(ND->getType(), ND);
5591 if (VarDecl *VD = dyn_cast<VarDecl>(SD)) {
5592 if (VD->hasAttr<BlocksAttr>()) {
5593 static unsigned uniqueByrefDeclCount = 0;
5594 assert(!BlockByRefDeclNo.count(ND) &&((!BlockByRefDeclNo.count(ND) && "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl"
) ? static_cast<void> (0) : __assert_fail ("!BlockByRefDeclNo.count(ND) && \"RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5595, __PRETTY_FUNCTION__))
5595 "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl")((!BlockByRefDeclNo.count(ND) && "RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl"
) ? static_cast<void> (0) : __assert_fail ("!BlockByRefDeclNo.count(ND) && \"RewriteFunctionBodyOrGlobalInitializer: Duplicate byref decl\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5595, __PRETTY_FUNCTION__))
;
5596 BlockByRefDeclNo[ND] = uniqueByrefDeclCount++;
5597 RewriteByRefVar(VD, (DI == DS->decl_begin()), ((DI+1) == DE));
5598 }
5599 else
5600 RewriteTypeOfDecl(VD);
5601 }
5602 }
5603 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(SD)) {
5604 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5605 RewriteBlockPointerDecl(TD);
5606 else if (TD->getUnderlyingType()->isFunctionPointerType())
5607 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5608 }
5609 }
5610 }
5611
5612 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S))
5613 RewriteObjCQualifiedInterfaceTypes(CE);
5614
5615 if (isa<SwitchStmt>(S) || isa<WhileStmt>(S) ||
5616 isa<DoStmt>(S) || isa<ForStmt>(S)) {
5617 assert(!Stmts.empty() && "Statement stack is empty")((!Stmts.empty() && "Statement stack is empty") ? static_cast
<void> (0) : __assert_fail ("!Stmts.empty() && \"Statement stack is empty\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5617, __PRETTY_FUNCTION__))
;
5618 assert ((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) ||(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
5619 isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back()))(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
5620 && "Statement stack mismatch")(((isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>
(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt
>(Stmts.back())) && "Statement stack mismatch") ? static_cast
<void> (0) : __assert_fail ("(isa<SwitchStmt>(Stmts.back()) || isa<WhileStmt>(Stmts.back()) || isa<DoStmt>(Stmts.back()) || isa<ForStmt>(Stmts.back())) && \"Statement stack mismatch\""
, "/build/llvm-toolchain-snapshot-10~svn374814/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp"
, 5620, __PRETTY_FUNCTION__))
;
5621 Stmts.pop_back();
5622 }
5623 // Handle blocks rewriting.
5624 if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
5625 ValueDecl *VD = DRE->getDecl();
5626 if (VD->hasAttr<BlocksAttr>())
5627 return RewriteBlockDeclRefExpr(DRE);
5628 if (HasLocalVariableExternalStorage(VD))
5629 return RewriteLocalVariableExternalStorage(DRE);
5630 }
5631
5632 if (CallExpr *CE = dyn_cast<CallExpr>(S)) {
5633 if (CE->getCallee()->getType()->isBlockPointerType()) {
5634 Stmt *BlockCall = SynthesizeBlockCall(CE, CE->getCallee());
5635 ReplaceStmt(S, BlockCall);
5636 return BlockCall;
5637 }
5638 }
5639 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(S)) {
5640 RewriteCastExpr(CE);
5641 }
5642 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5643 RewriteImplicitCastObjCExpr(ICE);
5644 }
5645#if 0
5646
5647 if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(S)) {
5648 CastExpr *Replacement = new (Context) CastExpr(ICE->getType(),
5649 ICE->getSubExpr(),
5650 SourceLocation());
5651 // Get the new text.
5652 std::string SStr;
5653 llvm::raw_string_ostream Buf(SStr);
5654 Replacement->printPretty(Buf);
5655 const std::string &Str = Buf.str();
5656
5657 printf("CAST = %s\n", &Str[0]);
5658 InsertText(ICE->getSubExpr()->getBeginLoc(), Str);
5659 delete S;
5660 return Replacement;
5661 }
5662#endif
5663 // Return this stmt unmodified.
5664 return S;
5665}
5666
5667void RewriteModernObjC::RewriteRecordBody(RecordDecl *RD) {
5668 for (auto *FD : RD->fields()) {
5669 if (isTopLevelBlockPointerType(FD->getType()))
5670 RewriteBlockPointerDecl(FD);
5671 if (FD->getType()->isObjCQualifiedIdType() ||
5672 FD->getType()->isObjCQualifiedInterfaceType())
5673 RewriteObjCQualifiedInterfaceTypes(FD);
5674 }
5675}
5676
5677/// HandleDeclInMainFile - This is called for each top-level decl defined in the
5678/// main file of the input.
5679void RewriteModernObjC::HandleDeclInMainFile(Decl *D) {
5680 switch (D->getKind()) {
5681 case Decl::Function: {
5682 FunctionDecl *FD = cast<FunctionDecl>(D);
5683 if (FD->isOverloadedOperator())
5684 return;
5685
5686 // Since function prototypes don't have ParmDecl's, we check the function
5687 // prototype. This enables us to rewrite function declarations and
5688 // definitions using the same code.
5689 RewriteBlocksInFunctionProtoType(FD->getType(), FD);
5690
5691 if (!FD->isThisDeclarationADefinition())
5692 break;
5693
5694 // FIXME: If this should support Obj-C++, support CXXTryStmt
5695 if (CompoundStmt *Body = dyn_cast_or_null<CompoundStmt>(FD->getBody())) {
5696 CurFunctionDef = FD;
5697 CurrentBody = Body;
5698 Body =
5699 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5700 FD->setBody(Body);
5701 CurrentBody = nullptr;
5702 if (PropParentMap) {
5703 delete PropParentMap;
5704 PropParentMap = nullptr;
5705 }
5706 // This synthesizes and inserts the block "impl" struct, invoke function,
5707 // and any copy/dispose helper functions.
5708 InsertBlockLiteralsWithinFunction(FD);
5709 RewriteLineDirective(D);
5710 CurFunctionDef = nullptr;
5711 }
5712 break;
5713 }
5714 case Decl::ObjCMethod: {
5715 ObjCMethodDecl *MD = cast<ObjCMethodDecl>(D);
5716 if (CompoundStmt *Body = MD->getCompoundBody()) {
5717 CurMethodDef = MD;
5718 CurrentBody = Body;
5719 Body =
5720 cast_or_null<CompoundStmt>(RewriteFunctionBodyOrGlobalInitializer(Body));
5721 MD->setBody(Body);
5722 CurrentBody = nullptr;
5723 if (PropParentMap) {
5724 delete PropParentMap;
5725 PropParentMap = nullptr;
5726 }
5727 InsertBlockLiteralsWithinMethod(MD);
5728 RewriteLineDirective(D);
5729 CurMethodDef = nullptr;
5730 }
5731 break;
5732 }
5733 case Decl::ObjCImplementation: {
5734 ObjCImplementationDecl *CI = cast<ObjCImplementationDecl>(D);
5735 ClassImplementation.push_back(CI);
5736 break;
5737 }
5738 case Decl::ObjCCategoryImpl: {
5739 ObjCCategoryImplDecl *CI = cast<ObjCCategoryImplDecl>(D);
5740 CategoryImplementation.push_back(CI);
5741 break;
5742 }
5743 case Decl::Var: {
5744 VarDecl *VD = cast<VarDecl>(D);
5745 RewriteObjCQualifiedInterfaceTypes(VD);
5746 if (isTopLevelBlockPointerType(VD->getType()))
5747 RewriteBlockPointerDecl(VD);
5748 else if (VD->getType()->isFunctionPointerType()) {
5749 CheckFunctionPointerDecl(VD->getType(), VD);
5750 if (VD->getInit()) {
5751 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5752 RewriteCastExpr(CE);
5753 }
5754 }
5755 } else if (VD->getType()->isRecordType()) {
5756 RecordDecl *RD = VD->getType()->castAs<RecordType>()->getDecl();
5757 if (RD->isCompleteDefinition())
5758 RewriteRecordBody(RD);
5759 }
5760 if (VD->getInit()) {
5761 GlobalVarDecl = VD;
5762 CurrentBody = VD->getInit();
5763 RewriteFunctionBodyOrGlobalInitializer(VD->getInit());
5764 CurrentBody = nullptr;
5765 if (PropParentMap) {
5766 delete PropParentMap;
5767 PropParentMap = nullptr;
5768 }
5769 SynthesizeBlockLiterals(VD->getTypeSpecStartLoc(), VD->getName());
5770 GlobalVarDecl = nullptr;
5771
5772 // This is needed for blocks.
5773 if (CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(VD->getInit())) {
5774 RewriteCastExpr(CE);
5775 }
5776 }
5777 break;
5778 }
5779 case Decl::TypeAlias:
5780 case Decl::Typedef: {
5781 if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(D)) {
5782 if (isTopLevelBlockPointerType(TD->getUnderlyingType()))
5783 RewriteBlockPointerDecl(TD);
5784 else if (TD->getUnderlyingType()->isFunctionPointerType())
5785 CheckFunctionPointerDecl(TD->getUnderlyingType(), TD);
5786 else
5787 RewriteObjCQualifiedInterfaceTypes(TD);
5788 }
5789 break;
5790 }
5791 case Decl::CXXRecord:
5792 case Decl::Record: {
5793 RecordDecl *RD = cast<RecordDecl>(D);
5794 if (RD->isCompleteDefinition())
5795 RewriteRecordBody(RD);
5796 break;
5797 }
5798 default:
5799 break;
5800 }
5801 // Nothing yet.
5802}
5803
5804/// Write_ProtocolExprReferencedMetadata - This routine writer out the
5805/// protocol reference symbols in the for of:
5806/// struct _protocol_t *PROTOCOL_REF = &PROTOCOL_METADATA.
5807static void Write_ProtocolExprReferencedMetadata(ASTContext *Context,
5808 ObjCProtocolDecl *PDecl,
5809 std::string &Result) {
5810 // Also output .objc_protorefs$B section and its meta-data.
5811 if (Context->getLangOpts().MicrosoftExt)
5812 Result += "static ";
5813 Result += "struct _protocol_t *";
5814 Result += "_OBJC_PROTOCOL_REFERENCE_$_";
5815 Result += PDecl->getNameAsString();
5816 Result += " = &";
5817 Result += "_OBJC_PROTOCOL_"; Result += PDecl->getNameAsString();
5818 Result += ";\n";
5819}
5820
5821void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
5822 if (Diags.hasErrorOccurred())
1
Assuming the condition is false
2
Taking false branch
5823 return;
5824
5825 RewriteInclude();
5826
5827 for (unsigned i = 0, e = FunctionDefinitionsSeen.size(); i < e; i++) {
3
Assuming 'i' is >= 'e'
4
Loop condition is false. Execution continues on line 5837
5828 // translation of function bodies were postponed until all class and
5829 // their extensions and implementations are seen. This is because, we
5830 // cannot build grouping structs for bitfields until they are all seen.
5831 FunctionDecl *FDecl = FunctionDefinitionsSeen[i];
5832 HandleTopLevelSingleDecl(FDecl);
5833 }
5834
5835 // Here's a great place to add any extra declarations that may be needed.
5836 // Write out meta data for each @protocol(<expr>).
5837 for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
5838 RewriteObjCProtocolMetaData(ProtDecl, Preamble);
5839 Write_ProtocolExprReferencedMetadata(Context, ProtDecl, Preamble);
5840 }
5841
5842 InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
5843
5844 if (ClassImplementation.size() || CategoryImplementation.size())
5
Assuming the condition is false
6
Assuming the condition is true
7
Taking true branch
5845 RewriteImplementations();
8
Calling 'RewriteModernObjC::RewriteImplementations'
5846
5847 for (unsigned i = 0, e = ObjCInterfacesSeen.size(); i < e; i++) {
5848 ObjCInterfaceDecl *CDecl = ObjCInterfacesSeen[i];
5849 // Write struct declaration for the class matching its ivar declarations.
5850 // Note that for modern abi, this is postponed until the end of TU
5851 // because class extensions and the implementation might declare their own
5852 // private ivars.
5853 RewriteInterfaceDecl(CDecl);
5854 }
5855
5856 // Get the buffer corresponding to MainFileID. If we haven't changed it, then
5857 // we are done.
5858 if (const RewriteBuffer *RewriteBuf =
5859 Rewrite.getRewriteBufferFor(MainFileID)) {
5860 //printf("Changed:\n");
5861 *OutFile << std::string(RewriteBuf->begin(), RewriteBuf->end());
5862 } else {
5863 llvm::errs() << "No changes\n";
5864 }
5865
5866 if (ClassImplementation.size() || CategoryImplementation.size() ||
5867 ProtocolExprDecls.size()) {
5868 // Rewrite Objective-c meta data*
5869 std::string ResultStr;
5870 RewriteMetaDataIntoBuffer(ResultStr);
5871 // Emit metadata.
5872 *OutFile << ResultStr;
5873 }
5874 // Emit ImageInfo;
5875 {
5876 std::string ResultStr;
5877 WriteImageInfo(ResultStr);
5878 *OutFile << ResultStr;
5879 }
5880 OutFile->flush();
5881}
5882
5883void RewriteModernObjC::Initialize(ASTContext &context) {
5884 InitializeCommon(context);
5885
5886 Preamble += "#ifndef __OBJC2__\n";
5887 Preamble += "#define __OBJC2__\n";
5888 Preamble += "#endif\n";
5889
5890 // declaring objc_selector outside the parameter list removes a silly
5891 // scope related warning...
5892 if (IsHeader)
5893 Preamble = "#pragma once\n";
5894 Preamble += "struct objc_selector; struct objc_class;\n";
5895 Preamble += "struct __rw_objc_super { \n\tstruct objc_object *object; ";
5896 Preamble += "\n\tstruct objc_object *superClass; ";
5897 // Add a constructor for creating temporary objects.
5898 Preamble += "\n\t__rw_objc_super(struct objc_object *o, struct objc_object *s) ";
5899 Preamble += ": object(o), superClass(s) {} ";
5900 Preamble += "\n};\n";
5901
5902 if (LangOpts.MicrosoftExt) {
5903 // Define all sections using syntax that makes sense.
5904 // These are currently generated.
5905 Preamble += "\n#pragma section(\".objc_classlist$B\", long, read, write)\n";
5906 Preamble += "#pragma section(\".objc_catlist$B\", long, read, write)\n";
5907 Preamble += "#pragma section(\".objc_imageinfo$B\", long, read, write)\n";
5908 Preamble += "#pragma section(\".objc_nlclslist$B\", long, read, write)\n";
5909 Preamble += "#pragma section(\".objc_nlcatlist$B\", long, read, write)\n";
5910 // These are generated but not necessary for functionality.
5911 Preamble += "#pragma section(\".cat_cls_meth$B\", long, read, write)\n";
5912 Preamble += "#pragma section(\".inst_meth$B\", long, read, write)\n";
5913 Preamble += "#pragma section(\".cls_meth$B\", long, read, write)\n";
5914 Preamble += "#pragma section(\".objc_ivar$B\", long, read, write)\n";
5915
5916 // These need be generated for performance. Currently they are not,
5917 // using API calls instead.
5918 Preamble += "#pragma section(\".objc_selrefs$B\", long, read, write)\n";
5919 Preamble += "#pragma section(\".objc_classrefs$B\", long, read, write)\n";
5920 Preamble += "#pragma section(\".objc_superrefs$B\", long, read, write)\n";
5921
5922 }
5923 Preamble += "#ifndef _REWRITER_typedef_Protocol\n";
5924 Preamble += "typedef struct objc_object Protocol;\n";
5925 Preamble += "#define _REWRITER_typedef_Protocol\n";
5926 Preamble += "#endif\n";
5927 if (LangOpts.MicrosoftExt) {
5928 Preamble += "#define __OBJC_RW_DLLIMPORT extern \"C\" __declspec(dllimport)\n";
5929 Preamble += "#define __OBJC_RW_STATICIMPORT extern \"C\"\n";
5930 }
5931 else
5932 Preamble += "#define __OBJC_RW_DLLIMPORT extern\n";
5933
5934 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend(void);\n";
5935 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper(void);\n";
5936 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_stret(void);\n";
5937 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSendSuper_stret(void);\n";
5938 Preamble += "__OBJC_RW_DLLIMPORT void objc_msgSend_fpret(void);\n";
5939
5940 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getClass";
5941 Preamble += "(const char *);\n";
5942 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *class_getSuperclass";
5943 Preamble += "(struct objc_class *);\n";
5944 Preamble += "__OBJC_RW_DLLIMPORT struct objc_class *objc_getMetaClass";
5945 Preamble += "(const char *);\n";
5946 Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
5947 // @synchronized hooks.
5948 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_enter( struct objc_object *);\n";
5949 Preamble += "__OBJC_RW_DLLIMPORT int objc_sync_exit( struct objc_object *);\n";
5950 Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
5951 Preamble += "#ifdef _WIN64\n";
5952 Preamble += "typedef unsigned long long _WIN_NSUInteger;\n";
5953 Preamble += "#else\n";
5954 Preamble += "typedef unsigned int _WIN_NSUInteger;\n";
5955 Preamble += "#endif\n";
5956 Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
5957 Preamble += "struct __objcFastEnumerationState {\n\t";
5958 Preamble += "unsigned long state;\n\t";
5959 Preamble += "void **itemsPtr;\n\t";
5960 Preamble += "unsigned long *mutationsPtr;\n\t";
5961 Preamble += "unsigned long extra[5];\n};\n";
5962 Preamble += "__OBJC_RW_DLLIMPORT void objc_enumerationMutation(struct objc_object *);\n";
5963 Preamble += "#define __FASTENUMERATIONSTATE\n";
5964 Preamble += "#endif\n";
5965 Preamble += "#ifndef __NSCONSTANTSTRINGIMPL\n";
5966 Preamble += "struct __NSConstantStringImpl {\n";
5967 Preamble += " int *isa;\n";
5968 Preamble += " int flags;\n";
5969 Preamble += " char *str;\n";
5970 Preamble += "#if _WIN64\n";
5971 Preamble += " long long length;\n";
5972 Preamble += "#else\n";
5973 Preamble += " long length;\n";
5974 Preamble += "#endif\n";
5975 Preamble += "};\n";
5976 Preamble += "#ifdef CF_EXPORT_CONSTANT_STRING\n";
5977 Preamble += "extern \"C\" __declspec(dllexport) int __CFConstantStringClassReference[];\n";
5978 Preamble += "#else\n";
5979 Preamble += "__OBJC_RW_DLLIMPORT int __CFConstantStringClassReference[];\n";
5980 Preamble += "#endif\n";
5981 Preamble += "#define __NSCONSTANTSTRINGIMPL\n";
5982 Preamble += "#endif\n";
5983 // Blocks preamble.
5984 Preamble += "#ifndef BLOCK_IMPL\n";
5985 Preamble += "#define BLOCK_IMPL\n";
5986 Preamble += "struct __block_impl {\n";
5987 Preamble += " void *isa;\n";
5988 Preamble += " int Flags;\n";
5989 Preamble += " int Reserved;\n";
5990 Preamble += " void *FuncPtr;\n";
5991 Preamble += "};\n";
5992 Preamble += "// Runtime copy/destroy helper functions (from Block_private.h)\n";
5993 Preamble += "#ifdef __OBJC_EXPORT_BLOCKS\n";
5994 Preamble += "extern \"C\" __declspec(dllexport) "
5995 "void _Block_object_assign(void *, const void *, const int);\n";
5996 Preamble += "extern \"C\" __declspec(dllexport) void _Block_object_dispose(const void *, const int);\n";
5997 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteGlobalBlock[32];\n";
5998 Preamble += "extern \"C\" __declspec(dllexport) void *_NSConcreteStackBlock[32];\n";
5999 Preamble += "#else\n";
6000 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_assign(void *, const void *, const int);\n";
6001 Preamble += "__OBJC_RW_DLLIMPORT void _Block_object_dispose(const void *, const int);\n";
6002 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteGlobalBlock[32];\n";
6003 Preamble += "__OBJC_RW_DLLIMPORT void *_NSConcreteStackBlock[32];\n";
6004 Preamble += "#endif\n";
6005 Preamble += "#endif\n";
6006 if (LangOpts.MicrosoftExt) {
6007 Preamble += "#undef __OBJC_RW_DLLIMPORT\n";
6008 Preamble += "#undef __OBJC_RW_STATICIMPORT\n";
6009 Preamble += "#ifndef KEEP_ATTRIBUTES\n"; // We use this for clang tests.
6010 Preamble += "#define __attribute__(X)\n";
6011 Preamble += "#endif\n";
6012 Preamble += "#ifndef __weak\n";
6013 Preamble += "#define __weak\n";
6014 Preamble += "#endif\n";
6015 Preamble += "#ifndef __block\n";