clang  15.0.0git
CGObjCRuntime.cpp
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1 //==- CGObjCRuntime.cpp - Interface to Shared Objective-C Runtime Features ==//
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 // This abstract class defines the interface for Objective-C runtime-specific
10 // code generation. It provides some concrete helper methods for functionality
11 // shared between all (or most) of the Objective-C runtimes supported by clang.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #include "CGObjCRuntime.h"
16 #include "CGCXXABI.h"
17 #include "CGCleanup.h"
18 #include "CGRecordLayout.h"
19 #include "CodeGenFunction.h"
20 #include "CodeGenModule.h"
21 #include "clang/AST/RecordLayout.h"
22 #include "clang/AST/StmtObjC.h"
25 #include "llvm/Support/SaveAndRestore.h"
26 
27 using namespace clang;
28 using namespace CodeGen;
29 
31  const ObjCInterfaceDecl *OID,
32  const ObjCIvarDecl *Ivar) {
33  return CGM.getContext().lookupFieldBitOffset(OID, nullptr, Ivar) /
35 }
36 
38  const ObjCImplementationDecl *OID,
39  const ObjCIvarDecl *Ivar) {
41  Ivar) /
43 }
44 
47  const ObjCInterfaceDecl *ID,
48  const ObjCIvarDecl *Ivar) {
49  return CGM.getContext().lookupFieldBitOffset(ID, ID->getImplementation(),
50  Ivar);
51 }
52 
54  const ObjCInterfaceDecl *OID,
55  llvm::Value *BaseValue,
56  const ObjCIvarDecl *Ivar,
57  unsigned CVRQualifiers,
58  llvm::Value *Offset) {
59  // Compute (type*) ( (char *) BaseValue + Offset)
60  QualType InterfaceTy{OID->getTypeForDecl(), 0};
61  QualType ObjectPtrTy =
62  CGF.CGM.getContext().getObjCObjectPointerType(InterfaceTy);
63  QualType IvarTy =
64  Ivar->getUsageType(ObjectPtrTy).withCVRQualifiers(CVRQualifiers);
65  llvm::Type *LTy = CGF.CGM.getTypes().ConvertTypeForMem(IvarTy);
66  llvm::Value *V = CGF.Builder.CreateBitCast(BaseValue, CGF.Int8PtrTy);
67  V = CGF.Builder.CreateInBoundsGEP(CGF.Int8Ty, V, Offset, "add.ptr");
68 
69  if (!Ivar->isBitField()) {
70  V = CGF.Builder.CreateBitCast(V, llvm::PointerType::getUnqual(LTy));
71  LValue LV = CGF.MakeNaturalAlignAddrLValue(V, IvarTy);
72  return LV;
73  }
74 
75  // We need to compute an access strategy for this bit-field. We are given the
76  // offset to the first byte in the bit-field, the sub-byte offset is taken
77  // from the original layout. We reuse the normal bit-field access strategy by
78  // treating this as an access to a struct where the bit-field is in byte 0,
79  // and adjust the containing type size as appropriate.
80  //
81  // FIXME: Note that currently we make a very conservative estimate of the
82  // alignment of the bit-field, because (a) it is not clear what guarantees the
83  // runtime makes us, and (b) we don't have a way to specify that the struct is
84  // at an alignment plus offset.
85  //
86  // Note, there is a subtle invariant here: we can only call this routine on
87  // non-synthesized ivars but we may be called for synthesized ivars. However,
88  // a synthesized ivar can never be a bit-field, so this is safe.
89  uint64_t FieldBitOffset =
90  CGF.CGM.getContext().lookupFieldBitOffset(OID, nullptr, Ivar);
91  uint64_t BitOffset = FieldBitOffset % CGF.CGM.getContext().getCharWidth();
92  uint64_t AlignmentBits = CGF.CGM.getTarget().getCharAlign();
93  uint64_t BitFieldSize = Ivar->getBitWidthValue(CGF.getContext());
94  CharUnits StorageSize = CGF.CGM.getContext().toCharUnitsFromBits(
95  llvm::alignTo(BitOffset + BitFieldSize, AlignmentBits));
96  CharUnits Alignment = CGF.CGM.getContext().toCharUnitsFromBits(AlignmentBits);
97 
98  // Allocate a new CGBitFieldInfo object to describe this access.
99  //
100  // FIXME: This is incredibly wasteful, these should be uniqued or part of some
101  // layout object. However, this is blocked on other cleanups to the
102  // Objective-C code, so for now we just live with allocating a bunch of these
103  // objects.
104  CGBitFieldInfo *Info = new (CGF.CGM.getContext()) CGBitFieldInfo(
105  CGBitFieldInfo::MakeInfo(CGF.CGM.getTypes(), Ivar, BitOffset, BitFieldSize,
106  CGF.CGM.getContext().toBits(StorageSize),
108 
109  Address Addr = Address(V, CGF.Int8Ty, Alignment);
110  Addr = CGF.Builder.CreateElementBitCast(Addr,
111  llvm::Type::getIntNTy(CGF.getLLVMContext(),
112  Info->StorageSize));
113  return LValue::MakeBitfield(Addr, *Info, IvarTy,
115  TBAAAccessInfo());
116 }
117 
118 namespace {
119  struct CatchHandler {
120  const VarDecl *Variable;
121  const Stmt *Body;
122  llvm::BasicBlock *Block;
123  llvm::Constant *TypeInfo;
124  /// Flags used to differentiate cleanups and catchalls in Windows SEH
125  unsigned Flags;
126  };
127 
128  struct CallObjCEndCatch final : EHScopeStack::Cleanup {
129  CallObjCEndCatch(bool MightThrow, llvm::FunctionCallee Fn)
130  : MightThrow(MightThrow), Fn(Fn) {}
131  bool MightThrow;
132  llvm::FunctionCallee Fn;
133 
134  void Emit(CodeGenFunction &CGF, Flags flags) override {
135  if (MightThrow)
136  CGF.EmitRuntimeCallOrInvoke(Fn);
137  else
138  CGF.EmitNounwindRuntimeCall(Fn);
139  }
140  };
141 }
142 
144  const ObjCAtTryStmt &S,
145  llvm::FunctionCallee beginCatchFn,
146  llvm::FunctionCallee endCatchFn,
147  llvm::FunctionCallee exceptionRethrowFn) {
148  // Jump destination for falling out of catch bodies.
150  if (S.getNumCatchStmts())
151  Cont = CGF.getJumpDestInCurrentScope("eh.cont");
152 
153  bool useFunclets = EHPersonality::get(CGF).usesFuncletPads();
154 
155  CodeGenFunction::FinallyInfo FinallyInfo;
156  if (!useFunclets)
157  if (const ObjCAtFinallyStmt *Finally = S.getFinallyStmt())
158  FinallyInfo.enter(CGF, Finally->getFinallyBody(),
159  beginCatchFn, endCatchFn, exceptionRethrowFn);
160 
162 
163 
164  // Enter the catch, if there is one.
165  if (S.getNumCatchStmts()) {
166  for (const ObjCAtCatchStmt *CatchStmt : S.catch_stmts()) {
167  const VarDecl *CatchDecl = CatchStmt->getCatchParamDecl();
168 
169  Handlers.push_back(CatchHandler());
170  CatchHandler &Handler = Handlers.back();
171  Handler.Variable = CatchDecl;
172  Handler.Body = CatchStmt->getCatchBody();
173  Handler.Block = CGF.createBasicBlock("catch");
174  Handler.Flags = 0;
175 
176  // @catch(...) always matches.
177  if (!CatchDecl) {
178  auto catchAll = getCatchAllTypeInfo();
179  Handler.TypeInfo = catchAll.RTTI;
180  Handler.Flags = catchAll.Flags;
181  // Don't consider any other catches.
182  break;
183  }
184 
185  Handler.TypeInfo = GetEHType(CatchDecl->getType());
186  }
187 
188  EHCatchScope *Catch = CGF.EHStack.pushCatch(Handlers.size());
189  for (unsigned I = 0, E = Handlers.size(); I != E; ++I)
190  Catch->setHandler(I, { Handlers[I].TypeInfo, Handlers[I].Flags }, Handlers[I].Block);
191  }
192 
193  if (useFunclets)
194  if (const ObjCAtFinallyStmt *Finally = S.getFinallyStmt()) {
195  CodeGenFunction HelperCGF(CGM, /*suppressNewContext=*/true);
196  if (!CGF.CurSEHParent)
197  CGF.CurSEHParent = cast<NamedDecl>(CGF.CurFuncDecl);
198  // Outline the finally block.
199  const Stmt *FinallyBlock = Finally->getFinallyBody();
200  HelperCGF.startOutlinedSEHHelper(CGF, /*isFilter*/false, FinallyBlock);
201 
202  // Emit the original filter expression, convert to i32, and return.
203  HelperCGF.EmitStmt(FinallyBlock);
204 
205  HelperCGF.FinishFunction(FinallyBlock->getEndLoc());
206 
207  llvm::Function *FinallyFunc = HelperCGF.CurFn;
208 
209 
210  // Push a cleanup for __finally blocks.
211  CGF.pushSEHCleanup(NormalAndEHCleanup, FinallyFunc);
212  }
213 
214 
215  // Emit the try body.
216  CGF.EmitStmt(S.getTryBody());
217 
218  // Leave the try.
219  if (S.getNumCatchStmts())
220  CGF.popCatchScope();
221 
222  // Remember where we were.
223  CGBuilderTy::InsertPoint SavedIP = CGF.Builder.saveAndClearIP();
224 
225  // Emit the handlers.
226  for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
227  CatchHandler &Handler = Handlers[I];
228 
229  CGF.EmitBlock(Handler.Block);
230  llvm::CatchPadInst *CPI = nullptr;
231  SaveAndRestore<llvm::Instruction *> RestoreCurrentFuncletPad(CGF.CurrentFuncletPad);
232  if (useFunclets)
233  if ((CPI = dyn_cast_or_null<llvm::CatchPadInst>(Handler.Block->getFirstNonPHI()))) {
234  CGF.CurrentFuncletPad = CPI;
235  CPI->setOperand(2, CGF.getExceptionSlot().getPointer());
236  }
237  llvm::Value *RawExn = CGF.getExceptionFromSlot();
238 
239  // Enter the catch.
240  llvm::Value *Exn = RawExn;
241  if (beginCatchFn)
242  Exn = CGF.EmitNounwindRuntimeCall(beginCatchFn, RawExn, "exn.adjusted");
243 
244  CodeGenFunction::LexicalScope cleanups(CGF, Handler.Body->getSourceRange());
245 
246  if (endCatchFn) {
247  // Add a cleanup to leave the catch.
248  bool EndCatchMightThrow = (Handler.Variable == nullptr);
249 
250  CGF.EHStack.pushCleanup<CallObjCEndCatch>(NormalAndEHCleanup,
251  EndCatchMightThrow,
252  endCatchFn);
253  }
254 
255  // Bind the catch parameter if it exists.
256  if (const VarDecl *CatchParam = Handler.Variable) {
257  llvm::Type *CatchType = CGF.ConvertType(CatchParam->getType());
258  llvm::Value *CastExn = CGF.Builder.CreateBitCast(Exn, CatchType);
259 
260  CGF.EmitAutoVarDecl(*CatchParam);
261  EmitInitOfCatchParam(CGF, CastExn, CatchParam);
262  }
263  if (CPI)
264  CGF.EHStack.pushCleanup<CatchRetScope>(NormalCleanup, CPI);
265 
266  CGF.ObjCEHValueStack.push_back(Exn);
267  CGF.EmitStmt(Handler.Body);
268  CGF.ObjCEHValueStack.pop_back();
269 
270  // Leave any cleanups associated with the catch.
271  cleanups.ForceCleanup();
272 
273  CGF.EmitBranchThroughCleanup(Cont);
274  }
275 
276  // Go back to the try-statement fallthrough.
277  CGF.Builder.restoreIP(SavedIP);
278 
279  // Pop out of the finally.
280  if (!useFunclets && S.getFinallyStmt())
281  FinallyInfo.exit(CGF);
282 
283  if (Cont.isValid())
284  CGF.EmitBlock(Cont.getBlock());
285 }
286 
288  llvm::Value *exn,
289  const VarDecl *paramDecl) {
290 
291  Address paramAddr = CGF.GetAddrOfLocalVar(paramDecl);
292 
293  switch (paramDecl->getType().getQualifiers().getObjCLifetime()) {
295  exn = CGF.EmitARCRetainNonBlock(exn);
296  LLVM_FALLTHROUGH;
297 
301  CGF.Builder.CreateStore(exn, paramAddr);
302  return;
303 
305  CGF.EmitARCInitWeak(paramAddr, exn);
306  return;
307  }
308  llvm_unreachable("invalid ownership qualifier");
309 }
310 
311 namespace {
312  struct CallSyncExit final : EHScopeStack::Cleanup {
313  llvm::FunctionCallee SyncExitFn;
314  llvm::Value *SyncArg;
315  CallSyncExit(llvm::FunctionCallee SyncExitFn, llvm::Value *SyncArg)
316  : SyncExitFn(SyncExitFn), SyncArg(SyncArg) {}
317 
318  void Emit(CodeGenFunction &CGF, Flags flags) override {
319  CGF.EmitNounwindRuntimeCall(SyncExitFn, SyncArg);
320  }
321  };
322 }
323 
325  const ObjCAtSynchronizedStmt &S,
326  llvm::FunctionCallee syncEnterFn,
327  llvm::FunctionCallee syncExitFn) {
328  CodeGenFunction::RunCleanupsScope cleanups(CGF);
329 
330  // Evaluate the lock operand. This is guaranteed to dominate the
331  // ARC release and lock-release cleanups.
332  const Expr *lockExpr = S.getSynchExpr();
333  llvm::Value *lock;
334  if (CGF.getLangOpts().ObjCAutoRefCount) {
335  lock = CGF.EmitARCRetainScalarExpr(lockExpr);
336  lock = CGF.EmitObjCConsumeObject(lockExpr->getType(), lock);
337  } else {
338  lock = CGF.EmitScalarExpr(lockExpr);
339  }
340  lock = CGF.Builder.CreateBitCast(lock, CGF.VoidPtrTy);
341 
342  // Acquire the lock.
343  CGF.Builder.CreateCall(syncEnterFn, lock)->setDoesNotThrow();
344 
345  // Register an all-paths cleanup to release the lock.
346  CGF.EHStack.pushCleanup<CallSyncExit>(NormalAndEHCleanup, syncExitFn, lock);
347 
348  // Emit the body of the statement.
349  CGF.EmitStmt(S.getSynchBody());
350 }
351 
352 /// Compute the pointer-to-function type to which a message send
353 /// should be casted in order to correctly call the given method
354 /// with the given arguments.
355 ///
356 /// \param method - may be null
357 /// \param resultType - the result type to use if there's no method
358 /// \param callArgs - the actual arguments, including implicit ones
361  QualType resultType,
363  // If there's a method, use information from that.
364  if (method) {
365  const CGFunctionInfo &signature =
367 
368  llvm::PointerType *signatureType =
369  CGM.getTypes().GetFunctionType(signature)->getPointerTo();
370 
371  const CGFunctionInfo &signatureForCall =
372  CGM.getTypes().arrangeCall(signature, callArgs);
373 
374  return MessageSendInfo(signatureForCall, signatureType);
375  }
376 
377  // There's no method; just use a default CC.
378  const CGFunctionInfo &argsInfo =
380 
381  // Derive the signature to call from that.
382  llvm::PointerType *signatureType =
383  CGM.getTypes().GetFunctionType(argsInfo)->getPointerTo();
384  return MessageSendInfo(argsInfo, signatureType);
385 }
386 
388  const ObjCMethodDecl *method,
389  bool isSuper,
390  const ObjCInterfaceDecl *classReceiver,
391  llvm::Value *receiver) {
392  // Super dispatch assumes that self is non-null; even the messenger
393  // doesn't have a null check internally.
394  if (isSuper)
395  return false;
396 
397  // If this is a direct dispatch of a class method, check whether the class,
398  // or anything in its hierarchy, was weak-linked.
399  if (classReceiver && method && method->isClassMethod())
400  return isWeakLinkedClass(classReceiver);
401 
402  // If we're emitting a method, and self is const (meaning just ARC, for now),
403  // and the receiver is a load of self, then self is a valid object.
404  if (auto curMethod =
405  dyn_cast_or_null<ObjCMethodDecl>(CGF.CurCodeDecl)) {
406  auto self = curMethod->getSelfDecl();
407  if (self->getType().isConstQualified()) {
408  if (auto LI = dyn_cast<llvm::LoadInst>(receiver->stripPointerCasts())) {
409  llvm::Value *selfAddr = CGF.GetAddrOfLocalVar(self).getPointer();
410  if (selfAddr == LI->getPointerOperand()) {
411  return false;
412  }
413  }
414  }
415  }
416 
417  // Otherwise, assume it can be null.
418  return true;
419 }
420 
422  do {
423  if (ID->isWeakImported())
424  return true;
425  } while ((ID = ID->getSuperClass()));
426 
427  return false;
428 }
429 
431  const ObjCMethodDecl *method,
432  const CallArgList &callArgs) {
433  CallArgList::const_iterator I = callArgs.begin();
434  for (auto i = method->param_begin(), e = method->param_end();
435  i != e; ++i, ++I) {
436  const ParmVarDecl *param = (*i);
437  if (param->hasAttr<NSConsumedAttr>()) {
438  RValue RV = I->getRValue(CGF);
439  assert(RV.isScalar() &&
440  "NullReturnState::complete - arg not on object");
442  } else {
443  QualType QT = param->getType();
444  auto *RT = QT->getAs<RecordType>();
445  if (RT && RT->getDecl()->isParamDestroyedInCallee()) {
446  RValue RV = I->getRValue(CGF);
448  switch (DtorKind) {
450  CGF.destroyCXXObject(CGF, RV.getAggregateAddress(), QT);
451  break;
454  break;
455  default:
456  llvm_unreachable("unexpected dtor kind");
457  break;
458  }
459  }
460  }
461  }
462 }
463 
464 llvm::Constant *
466  const ObjCProtocolDecl *protocol) {
467  return CGM.getObjCRuntime().GetOrEmitProtocol(protocol);
468 }
469 
471  bool includeCategoryName) {
472  std::string buffer;
473  llvm::raw_string_ostream out(buffer);
475  /*includePrefixByte=*/true,
476  includeCategoryName);
477  return buffer;
478 }
clang::ObjCInterfaceDecl
Represents an ObjC class declaration.
Definition: DeclObjC.h:1150
clang::CodeGen::CodeGenFunction::destroyCXXObject
static Destroyer destroyCXXObject
Definition: CodeGenFunction.h:2914
clang::MangleContext::mangleObjCMethodName
void mangleObjCMethodName(const ObjCMethodDecl *MD, raw_ostream &OS, bool includePrefixByte=true, bool includeCategoryNamespace=true)
Definition: Mangle.cpp:327
clang::CodeGen::CodeGenFunction::EmitARCRetainNonBlock
llvm::Value * EmitARCRetainNonBlock(llvm::Value *value)
Retain the given object, with normal retain semantics.
Definition: CGObjC.cpp:2263
clang::FieldDecl::getBitWidthValue
unsigned getBitWidthValue(const ASTContext &Ctx) const
Definition: Decl.cpp:4258
clang::QualType::DK_nontrivial_c_struct
@ DK_nontrivial_c_struct
Definition: Type.h:1215
clang::CodeGen::LValueBaseInfo
Definition: CGValue.h:154
clang::CodeGen::CodeGenTypeCache::Int8PtrTy
llvm::PointerType * Int8PtrTy
Definition: CodeGenTypeCache.h:57
clang::CodeGen::CodeGenFunction::FinallyInfo
A class controlling the emission of a finally block.
Definition: CodeGenFunction.h:736
clang::CodeGen::CGObjCRuntime::CGM
CodeGen::CodeGenModule & CGM
Definition: CGObjCRuntime.h:66
clang::CodeGen::RValue
RValue - This trivial value class is used to represent the result of an expression that is evaluated.
Definition: CGValue.h:39
clang::ASTContext::getCharWidth
uint64_t getCharWidth() const
Return the size of the character type, in bits.
Definition: ASTContext.h:2289
clang::CodeGen::CodeGenFunction::EmitObjCConsumeObject
llvm::Value * EmitObjCConsumeObject(QualType T, llvm::Value *Ptr)
Produce the code for a CK_ARCConsumeObject.
Definition: CGObjC.cpp:2065
CodeGenFunction.h
string
string(SUBSTRING ${CMAKE_CURRENT_BINARY_DIR} 0 ${PATH_LIB_START} PATH_HEAD) string(SUBSTRING $
Definition: CMakeLists.txt:22
clang::Decl::hasAttr
bool hasAttr() const
Definition: DeclBase.h:542
clang::CodeGen::CodeGenFunction::CurCodeDecl
const Decl * CurCodeDecl
CurCodeDecl - This is the inner-most code context, which includes blocks.
Definition: CodeGenFunction.h:322
clang::ObjCImplementationDecl
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2548
clang::CodeGen::CodeGenFunction::EmitNounwindRuntimeCall
llvm::CallInst * EmitNounwindRuntimeCall(llvm::FunctionCallee callee, const Twine &name="")
clang::CodeGen::CodeGenTypes::arrangeUnprototypedObjCMessageSend
const CGFunctionInfo & arrangeUnprototypedObjCMessageSend(QualType returnType, const CallArgList &args)
Definition: CGCall.cpp:515
clang::CodeGen::CGObjCRuntime::EmitAtSynchronizedStmt
void EmitAtSynchronizedStmt(CodeGenFunction &CGF, const ObjCAtSynchronizedStmt &S, llvm::FunctionCallee syncEnterFn, llvm::FunctionCallee syncExitFn)
Emits an @synchronize() statement, using the syncEnterFn and syncExitFn arguments as the functions ca...
Definition: CGObjCRuntime.cpp:324
clang::Qualifiers::OCL_Weak
@ OCL_Weak
Reading or writing from this object requires a barrier call.
Definition: Type.h:178
clang::CodeGen::LValue::MakeBitfield
static LValue MakeBitfield(Address Addr, const CGBitFieldInfo &Info, QualType type, LValueBaseInfo BaseInfo, TBAAAccessInfo TBAAInfo)
Create a new object to represent a bit-field access.
Definition: CGValue.h:448
clang::CodeGen::CGObjCRuntime::EmitValueForIvarAtOffset
LValue EmitValueForIvarAtOffset(CodeGen::CodeGenFunction &CGF, const ObjCInterfaceDecl *OID, llvm::Value *BaseValue, const ObjCIvarDecl *Ivar, unsigned CVRQualifiers, llvm::Value *Offset)
Definition: CGObjCRuntime.cpp:53
llvm::SmallVector
Definition: LLVM.h:38
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6527
clang::CodeGen::CGCXXABI::getMangleContext
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:111
clang::CodeGen::EHScopeStack::pushCatch
class EHCatchScope * pushCatch(unsigned NumHandlers)
Push a set of catch handlers on the stack.
Definition: CGCleanup.cpp:259
clang::CodeGen::CodeGenFunction::EmitAutoVarDecl
void EmitAutoVarDecl(const VarDecl &D)
EmitAutoVarDecl - Emit an auto variable declaration.
Definition: CGDecl.cpp:1323
clang::CodeGen::CodeGenFunction::FinallyInfo::enter
void enter(CodeGenFunction &CGF, const Stmt *Finally, llvm::FunctionCallee beginCatchFn, llvm::FunctionCallee endCatchFn, llvm::FunctionCallee rethrowFn)
Enters a finally block for an implementation using zero-cost exceptions.
Definition: CGException.cpp:1416
CGRecordLayout.h
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:675
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:697
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1680
clang::CodeGen::CodeGenFunction::createBasicBlock
llvm::BasicBlock * createBasicBlock(const Twine &name="", llvm::Function *parent=nullptr, llvm::BasicBlock *before=nullptr)
createBasicBlock - Create an LLVM basic block.
Definition: CodeGenFunction.h:2430
clang::ObjCAtTryStmt
Represents Objective-C's @try ... @catch ... @finally statement.
Definition: StmtObjC.h:165
clang::CodeGen::CGObjCRuntime::getMessageSendInfo
MessageSendInfo getMessageSendInfo(const ObjCMethodDecl *method, QualType resultType, CallArgList &callArgs)
Compute the pointer-to-function type to which a message send should be casted in order to correctly c...
Definition: CGObjCRuntime.cpp:360
clang::CodeGen::CGBuilderTy::CreateStore
llvm::StoreInst * CreateStore(llvm::Value *Val, Address Addr, bool IsVolatile=false)
Definition: CGBuilder.h:97
CGObjCRuntime.h
clang::Qualifiers::OCL_ExplicitNone
@ OCL_ExplicitNone
This object can be modified without requiring retains or releases.
Definition: Type.h:168
clang::CodeGen::CodeGenFunction::popCatchScope
void popCatchScope()
popCatchScope - Pops the catch scope at the top of the EHScope stack, emitting any required code (oth...
Definition: CGException.cpp:1179
clang::ObjCMethodDecl::param_end
param_const_iterator param_end() const
Definition: DeclObjC.h:361
clang::CodeGen::CGObjCRuntime::destroyCalleeDestroyedArguments
static void destroyCalleeDestroyedArguments(CodeGenFunction &CGF, const ObjCMethodDecl *method, const CallArgList &callArgs)
Destroy the callee-destroyed arguments of the given method, if it has any.
Definition: CGObjCRuntime.cpp:430
clang::CodeGen::CodeGenTypes::arrangeObjCMessageSendSignature
const CGFunctionInfo & arrangeObjCMessageSendSignature(const ObjCMethodDecl *MD, QualType receiverType)
Arrange the argument and result information for the function type through which to perform a send to ...
Definition: CGCall.cpp:484
clang::CodeGen::CodeGenFunction::EmitStmt
void EmitStmt(const Stmt *S, ArrayRef< const Attr * > Attrs=None)
EmitStmt - Emit the code for the statement.
Definition: CGStmt.cpp:53
clang::ASTContext::toBits
int64_t toBits(CharUnits CharSize) const
Convert a size in characters to a size in bits.
Definition: ASTContext.cpp:2456
clang::CodeGen::CodeGenFunction::JumpDest::getBlock
llvm::BasicBlock * getBlock() const
Definition: CodeGenFunction.h:246
clang::CodeGen::EHPersonality::get
static const EHPersonality & get(CodeGenModule &CGM, const FunctionDecl *FD)
Definition: CGException.cpp:230
clang::CodeGen::CodeGenFunction::Builder
CGBuilderTy Builder
Definition: CodeGenFunction.h:269
CodeGenABITypes.h
clang::ObjCImplDecl::getClassInterface
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2436
clang::CodeGen::CodeGenTypeCache::VoidPtrTy
llvm::PointerType * VoidPtrTy
Definition: CodeGenTypeCache.h:56
clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar
Address GetAddrOfLocalVar(const VarDecl *VD)
GetAddrOfLocalVar - Return the address of a local variable.
Definition: CodeGenFunction.h:2720
Offset
unsigned Offset
Definition: Format.cpp:2553
clang::CodeGen::ARCImpreciseLifetime
@ ARCImpreciseLifetime
Definition: CGValue.h:125
clang::CodeGen::AlignmentSource::Decl
@ Decl
The l-value was an access to a declared entity or something equivalently strong, like the address of ...
clang::CodeGen::CGObjCRuntime::MessageSendInfo
Definition: CGObjCRuntime.h:328
clang::CodeGen::CodeGenTypes::ConvertTypeForMem
llvm::Type * ConvertTypeForMem(QualType T, bool ForBitField=false)
ConvertTypeForMem - Convert type T into a llvm::Type.
Definition: CodeGenTypes.cpp:91
clang::CodeGen::EHPersonality::usesFuncletPads
bool usesFuncletPads() const
Does this personality use landingpads or the family of pad instructions designed to form funclets?
Definition: CGCleanup.h:619
clang::QualType::DK_cxx_destructor
@ DK_cxx_destructor
Definition: Type.h:1212
clang::TypeInfo
Definition: ASTContext.h:178
V
#define V(N, I)
Definition: ASTContext.h:3176
clang::CodeGen::CodeGenFunction::RunCleanupsScope
Enters a new scope for capturing cleanups, all of which will be executed once the scope is exited.
Definition: CodeGenFunction.h:872
clang::ObjCAtCatchStmt
Represents Objective-C's @catch statement.
Definition: StmtObjC.h:77
clang::CodeGen::TBAAAccessInfo
Definition: CodeGenTBAA.h:41
clang::CodeGen::EHCatchScope
A scope which attempts to handle some, possibly all, types of exceptions.
Definition: CGCleanup.h:146
clang::RecordType
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4647
clang::CodeGen::emitObjCProtocolObject
llvm::Constant * emitObjCProtocolObject(CodeGenModule &CGM, const ObjCProtocolDecl *p)
Get a pointer to a protocol object for the given declaration, emitting it if it hasn't already been e...
Definition: CGObjCRuntime.cpp:465
clang::CodeGen::EHScopeStack::Cleanup
Information for lazily generating a cleanup.
Definition: EHScopeStack.h:141
clang::CodeGen::CodeGenModule::getObjCRuntime
CGObjCRuntime & getObjCRuntime()
Return a reference to the configured Objective-C runtime.
Definition: CodeGenModule.h:588
clang::CodeGen::CodeGenFunction::pushSEHCleanup
void pushSEHCleanup(CleanupKind kind, llvm::Function *FinallyFunc)
Definition: CGException.cpp:2151
clang::Qualifiers::OCL_Strong
@ OCL_Strong
Assigning into this object requires the old value to be released and the new value to be retained.
Definition: Type.h:175
clang::CodeGen::CodeGenFunction::CurSEHParent
const NamedDecl * CurSEHParent
Definition: CodeGenFunction.h:542
clang::CodeGen::CGObjCRuntime::getSymbolNameForMethod
std::string getSymbolNameForMethod(const ObjCMethodDecl *method, bool includeCategoryName=true)
Definition: CGObjCRuntime.cpp:470
clang::CharUnits::fromQuantity
static CharUnits fromQuantity(QuantityType Quantity)
fromQuantity - Construct a CharUnits quantity from a raw integer type.
Definition: CharUnits.h:63
CGFunctionInfo.h
CGCleanup.h
clang::Type::getAs
const T * getAs() const
Member-template getAs<specific type>'.
Definition: Type.h:7243
clang::CodeGen::CodeGenFunction::getExceptionSlot
Address getExceptionSlot()
Returns a pointer to the function's exception object and selector slot, which is assigned in every la...
Definition: CGException.cpp:421
clang::CodeGen::CodeGenFunction::LexicalScope::ForceCleanup
void ForceCleanup()
Force the emission of cleanups now, instead of waiting until this object is destroyed.
Definition: CodeGenFunction.h:969
clang::ObjCAtSynchronizedStmt
Represents Objective-C's @synchronized statement.
Definition: StmtObjC.h:302
clang::Stmt::getEndLoc
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:348
clang::VarDecl
Represents a variable declaration or definition.
Definition: Decl.h:874
clang::CodeGen::CGBitFieldInfo::MakeInfo
static CGBitFieldInfo MakeInfo(class CodeGenTypes &Types, const FieldDecl *FD, uint64_t Offset, uint64_t Size, uint64_t StorageSize, CharUnits StorageOffset)
Given a bit-field decl, build an appropriate helper object for accessing that field (which is expecte...
Definition: CGRecordLayoutBuilder.cpp:838
clang::CodeGen::CodeGenModule::getTypes
CodeGenTypes & getTypes()
Definition: CodeGenModule.h:721
clang::ObjCAtFinallyStmt
Represents Objective-C's @finally statement.
Definition: StmtObjC.h:127
clang::CodeGen::CodeGenFunction::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenFunction.h:2025
clang::CodeGen::CodeGenFunction::getContext
ASTContext & getContext() const
Definition: CodeGenFunction.h:1982
clang::CodeGen::NormalCleanup
@ NormalCleanup
Denotes a cleanup that should run when a scope is exited using normal control flow (falling off the e...
Definition: EHScopeStack.h:84
clang::CodeGen::CodeGenFunction::FinishFunction
void FinishFunction(SourceLocation EndLoc=SourceLocation())
FinishFunction - Complete IR generation of the current function.
Definition: CodeGenFunction.cpp:325
clang::CodeGen::CGObjCRuntime::EmitInitOfCatchParam
void EmitInitOfCatchParam(CodeGenFunction &CGF, llvm::Value *exn, const VarDecl *paramDecl)
Definition: CGObjCRuntime.cpp:287
clang::CodeGen::Address
An aligned address.
Definition: Address.h:74
clang::CodeGen::CodeGenFunction::getJumpDestInCurrentScope
JumpDest getJumpDestInCurrentScope(llvm::BasicBlock *Target)
The given basic block lies in the current EH scope, but may be a target of a potentially scope-crossi...
Definition: CodeGenFunction.h:1145
CodeGenModule.h
clang::Qualifiers::OCL_Autoreleasing
@ OCL_Autoreleasing
Assigning into this object requires a lifetime extension.
Definition: Type.h:181
StmtObjC.h
clang::CodeGen::CodeGenFunction::EmitARCRetainScalarExpr
llvm::Value * EmitARCRetainScalarExpr(const Expr *expr)
EmitARCRetainScalarExpr - Semantically equivalent to EmitARCRetainObject(e->getType(),...
Definition: CGObjC.cpp:3421
clang::CodeGen::CodeGenModule::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenModule.h:709
clang::QualType::withCVRQualifiers
QualType withCVRQualifiers(unsigned CVR) const
Definition: Type.h:869
clang::CodeGen::CGBitFieldInfo
Structure with information about how a bitfield should be accessed.
Definition: CGRecordLayout.h:65
clang::CodeGen::EHCatchScope::setHandler
void setHandler(unsigned I, llvm::Constant *Type, llvm::BasicBlock *Block)
Definition: CGCleanup.h:195
clang::CodeGen::CodeGenTypes::GetFunctionType
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.
Definition: CGCall.cpp:1613
clang::CodeGen::LValue
LValue - This represents an lvalue references.
Definition: CGValue.h:171
clang::CodeGen::CodeGenFunction::EHStack
EHScopeStack EHStack
Definition: CodeGenFunction.h:619
clang::CodeGen::CodeGenFunction::MakeNaturalAlignAddrLValue
LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T)
Definition: CodeGenFunction.cpp:187
clang::FieldDecl::isBitField
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:2933
clang::CodeGen::Address::getPointer
llvm::Value * getPointer() const
Definition: Address.h:93
clang::CodeGen::CodeGenFunction
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
Definition: CodeGenFunction.h:231
clang::CodeGen::CodeGenModule::getCXXABI
CGCXXABI & getCXXABI() const
Definition: CodeGenModule.h:714
clang::CodeGen::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:275
clang::CodeGen::CodeGenFunction::getExceptionFromSlot
llvm::Value * getExceptionFromSlot()
Returns the contents of the function's exception object and selector slots.
Definition: CGException.cpp:433
clang::CodeGen::CodeGenFunction::EmitARCRelease
void EmitARCRelease(llvm::Value *value, ARCPreciseLifetime_t precise)
Release the given object.
Definition: CGObjC.cpp:2405
clang::CodeGen::CodeGenFunction::LexicalScope
Definition: CodeGenFunction.h:931
clang::QualType::DestructionKind
DestructionKind
Definition: Type.h:1210
clang::CodeGen::CGObjCRuntime::ComputeBitfieldBitOffset
unsigned ComputeBitfieldBitOffset(CodeGen::CodeGenModule &CGM, const ObjCInterfaceDecl *ID, const ObjCIvarDecl *Ivar)
Definition: CGObjCRuntime.cpp:45
llvm::SaveAndRestore
Definition: LLVM.h:44
clang::CodeGen::CodeGenFunction::ConvertType
llvm::Type * ConvertType(QualType T)
Definition: CodeGenFunction.cpp:212
clang::CodeGen::CGBitFieldInfo::StorageSize
unsigned StorageSize
The storage size in bits which should be used when accessing this bitfield.
Definition: CGRecordLayout.h:78
clang::CodeGen::NormalAndEHCleanup
@ NormalAndEHCleanup
Definition: EHScopeStack.h:86
clang::CodeGen::CGObjCRuntime::canMessageReceiverBeNull
bool canMessageReceiverBeNull(CodeGenFunction &CGF, const ObjCMethodDecl *method, bool isSuper, const ObjCInterfaceDecl *classReceiver, llvm::Value *receiver)
Definition: CGObjCRuntime.cpp:387
clang::CodeGen::CGBuilderTy::CreateElementBitCast
Address CreateElementBitCast(Address Addr, llvm::Type *Ty, const llvm::Twine &Name="")
Cast the element type of the given address to a different type, preserving information like the align...
Definition: CGBuilder.h:165
clang::CodeGen::CodeGenFunction::EmitRuntimeCallOrInvoke
llvm::CallBase * EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee, ArrayRef< llvm::Value * > args, const Twine &name="")
Emits a call or invoke instruction to the given runtime function.
Definition: CGCall.cpp:4531
clang::CodeGen::CodeGenFunction::EmitScalarExpr
llvm::Value * EmitScalarExpr(const Expr *E, bool IgnoreResultAssign=false)
EmitScalarExpr - Emit the computation of the specified expression of LLVM scalar type,...
Definition: CGExprScalar.cpp:4869
clang::CodeGen::CodeGenFunction::destroyNonTrivialCStruct
static Destroyer destroyNonTrivialCStruct
Definition: CodeGenFunction.h:4345
clang::CodeGen::CGFunctionInfo
CGFunctionInfo - Class to encapsulate the information about a function definition.
Definition: CGFunctionInfo.h:546
CGCXXABI.h
clang::CodeGen::CodeGenFunction::JumpDest::isValid
bool isValid() const
Definition: CodeGenFunction.h:245
clang::CodeGen::CodeGenFunction::ObjCEHValueStack
SmallVector< llvm::Value *, 8 > ObjCEHValueStack
ObjCEHValueStack - Stack of Objective-C exception values, used for rethrows.
Definition: CodeGenFunction.h:733
clang::ObjCMethodDecl
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
clang::Qualifiers::OCL_None
@ OCL_None
There is no lifetime qualification on this type.
Definition: Type.h:164
clang::CodeGen::CodeGenFunction::CGM
CodeGenModule & CGM
Definition: CodeGenFunction.h:261
clang::ObjCMethodDecl::param_begin
param_const_iterator param_begin() const
Definition: DeclObjC.h:357
clang::CodeGen::CodeGenFunction::CurFn
llvm::Function * CurFn
Definition: CodeGenFunction.h:325
clang::Builtin::ID
ID
Definition: Builtins.h:51
clang::CodeGen::CGObjCRuntime::getCatchAllTypeInfo
virtual CatchTypeInfo getCatchAllTypeInfo()
Definition: CGObjCRuntime.h:147
clang
Definition: CalledOnceCheck.h:17
clang::CodeGen::CodeGenFunction::JumpDest
A jump destination is an abstract label, branching to which may require a jump out through normal cle...
Definition: CodeGenFunction.h:239
clang::ASTContext::toCharUnitsFromBits
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
Definition: ASTContext.cpp:2451
clang::Qualifiers::getObjCLifetime
ObjCLifetime getObjCLifetime() const
Definition: Type.h:337
clang::DeclaratorContext::Block
@ Block
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:69
clang::ObjCIvarDecl
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1923
clang::CodeGen::CGObjCRuntime::GetOrEmitProtocol
virtual llvm::Constant * GetOrEmitProtocol(const ObjCProtocolDecl *PD)=0
GetOrEmitProtocol - Get the protocol object for the given declaration, emitting it if necessary.
clang::CodeGen::CGObjCRuntime::isWeakLinkedClass
static bool isWeakLinkedClass(const ObjCInterfaceDecl *cls)
Definition: CGObjCRuntime.cpp:421
clang::ObjCProtocolDecl
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2052
clang::transformer::callArgs
RangeSelector callArgs(std::string ID)
Definition: RangeSelector.cpp:298
clang::Expr::getType
QualType getType() const
Definition: Expr.h:141
clang::CodeGen::RValue::getScalarVal
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
Definition: CGValue.h:61
clang::CodeGen::CodeGenFunction::startOutlinedSEHHelper
void startOutlinedSEHHelper(CodeGenFunction &ParentCGF, bool IsFilter, const Stmt *OutlinedStmt)
Arrange a function prototype that can be called by Windows exception handling personalities.
Definition: CGException.cpp:1999
clang::CodeGen::RValue::isScalar
bool isScalar() const
Definition: CGValue.h:54
clang::TargetInfo::getCharAlign
unsigned getCharAlign() const
Definition: TargetInfo.h:442
clang::CodeGen::CodeGenFunction::CurrentFuncletPad
llvm::Instruction * CurrentFuncletPad
Definition: CodeGenFunction.h:623
clang::CodeGen::CodeGenTypes::arrangeCall
const CGFunctionInfo & arrangeCall(const CGFunctionInfo &declFI, const CallArgList &args)
Given a function info for a declaration, return the function info for a call with the given arguments...
Definition: CGCall.cpp:715
clang::ASTContext::lookupFieldBitOffset
uint64_t lookupFieldBitOffset(const ObjCInterfaceDecl *OID, const ObjCImplementationDecl *ID, const ObjCIvarDecl *Ivar) const
Get the offset of an ObjCIvarDecl in bits.
Definition: RecordLayoutBuilder.cpp:3426
clang::CodeGen::CodeGenFunction::EmitARCInitWeak
void EmitARCInitWeak(Address addr, llvm::Value *value)
i8* @objc_initWeak(i8** addr, i8* value) Returns value.
Definition: CGObjC.cpp:2588
clang::CodeGen::CatchRetScope
Definition: CGCXXABI.h:659
clang::CharUnits
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
clang::CodeGen::CGObjCRuntime::ComputeIvarBaseOffset
uint64_t ComputeIvarBaseOffset(CodeGen::CodeGenModule &CGM, const ObjCInterfaceDecl *OID, const ObjCIvarDecl *Ivar)
Compute an offset to the given ivar, suitable for passing to EmitValueForIvarAtOffset.
Definition: CGObjCRuntime.cpp:30
clang::CodeGen::CGObjCRuntime::EmitTryCatchStmt
void EmitTryCatchStmt(CodeGenFunction &CGF, const ObjCAtTryStmt &S, llvm::FunctionCallee beginCatchFn, llvm::FunctionCallee endCatchFn, llvm::FunctionCallee exceptionRethrowFn)
Emits a try / catch statement.
Definition: CGObjCRuntime.cpp:143
clang::ObjCIvarDecl::getUsageType
QualType getUsageType(QualType objectType) const
Retrieve the type of this instance variable when viewed as a member of a specific object type.
Definition: DeclObjC.cpp:1870
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:685
clang::Expr
This represents one expression.
Definition: Expr.h:109
clang::CodeGen::CodeGenFunction::FinallyInfo::exit
void exit(CodeGenFunction &CGF)
Definition: CGException.cpp:1469
clang::ObjCInterfaceDecl::getTypeForDecl
const Type * getTypeForDecl() const
Definition: DeclObjC.h:1897
clang::CodeGen::CodeGenFunction::EmitBranchThroughCleanup
void EmitBranchThroughCleanup(JumpDest Dest)
EmitBranchThroughCleanup - Emit a branch from the current insert block through the normal cleanup han...
Definition: CGCleanup.cpp:1087
clang::QualType::isDestructedType
DestructionKind isDestructedType() const
Returns a nonzero value if objects of this type require non-trivial work to clean up after.
Definition: Type.h:1222
clang::CodeGen::CodeGenTypeCache::Int8Ty
llvm::IntegerType * Int8Ty
i8, i16, i32, and i64
Definition: CodeGenTypeCache.h:37
clang::ObjCMethodDecl::isClassMethod
bool isClassMethod() const
Definition: DeclObjC.h:439
clang::ASTContext::getObjCObjectPointerType
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
Definition: ASTContext.cpp:5487
clang::CodeGen::CallArgList
CallArgList - Type for representing both the value and type of arguments in a call.
Definition: CGCall.h:262
clang::CodeGen::CGObjCRuntime::GetEHType
virtual llvm::Constant * GetEHType(QualType T)=0
Get the type constant to catch for the given ObjC pointer type.
clang::CodeGen::CodeGenFunction::EmitBlock
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
Definition: CGStmt.cpp:544
clang::CodeGen::CodeGenFunction::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenFunction.h:1995
RecordLayout.h
clang::CodeGen::CodeGenFunction::CurFuncDecl
const Decl * CurFuncDecl
CurFuncDecl - Holds the Decl for the current outermost non-closure context.
Definition: CodeGenFunction.h:320
clang::CodeGen::RValue::getAggregateAddress
Address getAggregateAddress() const
getAggregateAddr() - Return the Value* of the address of the aggregate.
Definition: CGValue.h:73