clang  16.0.0git
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/IR/Instruction.h"
26 #include "llvm/Support/SaveAndRestore.h"
27 
28 using namespace clang;
29 using namespace CodeGen;
30 
32  const ObjCInterfaceDecl *OID,
33  const ObjCIvarDecl *Ivar) {
34  return CGM.getContext().lookupFieldBitOffset(OID, nullptr, Ivar) /
36 }
37 
39  const ObjCImplementationDecl *OID,
40  const ObjCIvarDecl *Ivar) {
42  Ivar) /
44 }
45 
48  const ObjCInterfaceDecl *ID,
49  const ObjCIvarDecl *Ivar) {
50  return CGM.getContext().lookupFieldBitOffset(ID, ID->getImplementation(),
51  Ivar);
52 }
53 
55  const ObjCInterfaceDecl *OID,
56  llvm::Value *BaseValue,
57  const ObjCIvarDecl *Ivar,
58  unsigned CVRQualifiers,
59  llvm::Value *Offset) {
60  // Compute (type*) ( (char *) BaseValue + Offset)
61  QualType InterfaceTy{OID->getTypeForDecl(), 0};
62  QualType ObjectPtrTy =
63  CGF.CGM.getContext().getObjCObjectPointerType(InterfaceTy);
64  QualType IvarTy =
65  Ivar->getUsageType(ObjectPtrTy).withCVRQualifiers(CVRQualifiers);
66  llvm::Type *LTy = CGF.CGM.getTypes().ConvertTypeForMem(IvarTy);
67  llvm::Value *V = CGF.Builder.CreateBitCast(BaseValue, CGF.Int8PtrTy);
68  V = CGF.Builder.CreateInBoundsGEP(CGF.Int8Ty, V, Offset, "add.ptr");
69 
70  if (!Ivar->isBitField()) {
71  V = CGF.Builder.CreateBitCast(V, llvm::PointerType::getUnqual(LTy));
72  LValue LV = CGF.MakeNaturalAlignAddrLValue(V, IvarTy);
73  return LV;
74  }
75 
76  // We need to compute an access strategy for this bit-field. We are given the
77  // offset to the first byte in the bit-field, the sub-byte offset is taken
78  // from the original layout. We reuse the normal bit-field access strategy by
79  // treating this as an access to a struct where the bit-field is in byte 0,
80  // and adjust the containing type size as appropriate.
81  //
82  // FIXME: Note that currently we make a very conservative estimate of the
83  // alignment of the bit-field, because (a) it is not clear what guarantees the
84  // runtime makes us, and (b) we don't have a way to specify that the struct is
85  // at an alignment plus offset.
86  //
87  // Note, there is a subtle invariant here: we can only call this routine on
88  // non-synthesized ivars but we may be called for synthesized ivars. However,
89  // a synthesized ivar can never be a bit-field, so this is safe.
90  uint64_t FieldBitOffset =
91  CGF.CGM.getContext().lookupFieldBitOffset(OID, nullptr, Ivar);
92  uint64_t BitOffset = FieldBitOffset % CGF.CGM.getContext().getCharWidth();
93  uint64_t AlignmentBits = CGF.CGM.getTarget().getCharAlign();
94  uint64_t BitFieldSize = Ivar->getBitWidthValue(CGF.getContext());
95  CharUnits StorageSize = CGF.CGM.getContext().toCharUnitsFromBits(
96  llvm::alignTo(BitOffset + BitFieldSize, AlignmentBits));
97  CharUnits Alignment = CGF.CGM.getContext().toCharUnitsFromBits(AlignmentBits);
98 
99  // Allocate a new CGBitFieldInfo object to describe this access.
100  //
101  // FIXME: This is incredibly wasteful, these should be uniqued or part of some
102  // layout object. However, this is blocked on other cleanups to the
103  // Objective-C code, so for now we just live with allocating a bunch of these
104  // objects.
105  CGBitFieldInfo *Info = new (CGF.CGM.getContext()) CGBitFieldInfo(
106  CGBitFieldInfo::MakeInfo(CGF.CGM.getTypes(), Ivar, BitOffset, BitFieldSize,
107  CGF.CGM.getContext().toBits(StorageSize),
109 
110  Address Addr = Address(V, CGF.Int8Ty, Alignment);
111  Addr = CGF.Builder.CreateElementBitCast(Addr,
112  llvm::Type::getIntNTy(CGF.getLLVMContext(),
113  Info->StorageSize));
114  return LValue::MakeBitfield(Addr, *Info, IvarTy,
116  TBAAAccessInfo());
117 }
118 
119 namespace {
120  struct CatchHandler {
121  const VarDecl *Variable;
122  const Stmt *Body;
123  llvm::BasicBlock *Block;
124  llvm::Constant *TypeInfo;
125  /// Flags used to differentiate cleanups and catchalls in Windows SEH
126  unsigned Flags;
127  };
128 
129  struct CallObjCEndCatch final : EHScopeStack::Cleanup {
130  CallObjCEndCatch(bool MightThrow, llvm::FunctionCallee Fn)
131  : MightThrow(MightThrow), Fn(Fn) {}
132  bool MightThrow;
133  llvm::FunctionCallee Fn;
134 
135  void Emit(CodeGenFunction &CGF, Flags flags) override {
136  if (MightThrow)
137  CGF.EmitRuntimeCallOrInvoke(Fn);
138  else
139  CGF.EmitNounwindRuntimeCall(Fn);
140  }
141  };
142 }
143 
145  const ObjCAtTryStmt &S,
146  llvm::FunctionCallee beginCatchFn,
147  llvm::FunctionCallee endCatchFn,
148  llvm::FunctionCallee exceptionRethrowFn) {
149  // Jump destination for falling out of catch bodies.
151  if (S.getNumCatchStmts())
152  Cont = CGF.getJumpDestInCurrentScope("eh.cont");
153 
154  bool useFunclets = EHPersonality::get(CGF).usesFuncletPads();
155 
156  CodeGenFunction::FinallyInfo FinallyInfo;
157  if (!useFunclets)
158  if (const ObjCAtFinallyStmt *Finally = S.getFinallyStmt())
159  FinallyInfo.enter(CGF, Finally->getFinallyBody(),
160  beginCatchFn, endCatchFn, exceptionRethrowFn);
161 
163 
164 
165  // Enter the catch, if there is one.
166  if (S.getNumCatchStmts()) {
167  for (const ObjCAtCatchStmt *CatchStmt : S.catch_stmts()) {
168  const VarDecl *CatchDecl = CatchStmt->getCatchParamDecl();
169 
170  Handlers.push_back(CatchHandler());
171  CatchHandler &Handler = Handlers.back();
172  Handler.Variable = CatchDecl;
173  Handler.Body = CatchStmt->getCatchBody();
174  Handler.Block = CGF.createBasicBlock("catch");
175  Handler.Flags = 0;
176 
177  // @catch(...) always matches.
178  if (!CatchDecl) {
179  auto catchAll = getCatchAllTypeInfo();
180  Handler.TypeInfo = catchAll.RTTI;
181  Handler.Flags = catchAll.Flags;
182  // Don't consider any other catches.
183  break;
184  }
185 
186  Handler.TypeInfo = GetEHType(CatchDecl->getType());
187  }
188 
189  EHCatchScope *Catch = CGF.EHStack.pushCatch(Handlers.size());
190  for (unsigned I = 0, E = Handlers.size(); I != E; ++I)
191  Catch->setHandler(I, { Handlers[I].TypeInfo, Handlers[I].Flags }, Handlers[I].Block);
192  }
193 
194  if (useFunclets)
195  if (const ObjCAtFinallyStmt *Finally = S.getFinallyStmt()) {
196  CodeGenFunction HelperCGF(CGM, /*suppressNewContext=*/true);
197  if (!CGF.CurSEHParent)
198  CGF.CurSEHParent = cast<NamedDecl>(CGF.CurFuncDecl);
199  // Outline the finally block.
200  const Stmt *FinallyBlock = Finally->getFinallyBody();
201  HelperCGF.startOutlinedSEHHelper(CGF, /*isFilter*/false, FinallyBlock);
202 
203  // Emit the original filter expression, convert to i32, and return.
204  HelperCGF.EmitStmt(FinallyBlock);
205 
206  HelperCGF.FinishFunction(FinallyBlock->getEndLoc());
207 
208  llvm::Function *FinallyFunc = HelperCGF.CurFn;
209 
210 
211  // Push a cleanup for __finally blocks.
212  CGF.pushSEHCleanup(NormalAndEHCleanup, FinallyFunc);
213  }
214 
215 
216  // Emit the try body.
217  CGF.EmitStmt(S.getTryBody());
218 
219  // Leave the try.
220  if (S.getNumCatchStmts())
221  CGF.popCatchScope();
222 
223  // Remember where we were.
224  CGBuilderTy::InsertPoint SavedIP = CGF.Builder.saveAndClearIP();
225 
226  // Emit the handlers.
227  for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
228  CatchHandler &Handler = Handlers[I];
229 
230  CGF.EmitBlock(Handler.Block);
231 
232  CodeGenFunction::LexicalScope Cleanups(CGF, Handler.Body->getSourceRange());
233  SaveAndRestore RevertAfterScope(CGF.CurrentFuncletPad);
234  if (useFunclets) {
235  llvm::Instruction *CPICandidate = Handler.Block->getFirstNonPHI();
236  if (auto *CPI = dyn_cast_or_null<llvm::CatchPadInst>(CPICandidate)) {
237  CGF.CurrentFuncletPad = CPI;
238  CPI->setOperand(2, CGF.getExceptionSlot().getPointer());
239  CGF.EHStack.pushCleanup<CatchRetScope>(NormalCleanup, CPI);
240  }
241  }
242 
243  llvm::Value *RawExn = CGF.getExceptionFromSlot();
244 
245  // Enter the catch.
246  llvm::Value *Exn = RawExn;
247  if (beginCatchFn)
248  Exn = CGF.EmitNounwindRuntimeCall(beginCatchFn, RawExn, "exn.adjusted");
249 
250  if (endCatchFn) {
251  // Add a cleanup to leave the catch.
252  bool EndCatchMightThrow = (Handler.Variable == nullptr);
253 
254  CGF.EHStack.pushCleanup<CallObjCEndCatch>(NormalAndEHCleanup,
255  EndCatchMightThrow,
256  endCatchFn);
257  }
258 
259  // Bind the catch parameter if it exists.
260  if (const VarDecl *CatchParam = Handler.Variable) {
261  llvm::Type *CatchType = CGF.ConvertType(CatchParam->getType());
262  llvm::Value *CastExn = CGF.Builder.CreateBitCast(Exn, CatchType);
263 
264  CGF.EmitAutoVarDecl(*CatchParam);
265  EmitInitOfCatchParam(CGF, CastExn, CatchParam);
266  }
267 
268  CGF.ObjCEHValueStack.push_back(Exn);
269  CGF.EmitStmt(Handler.Body);
270  CGF.ObjCEHValueStack.pop_back();
271 
272  // Leave any cleanups associated with the catch.
273  Cleanups.ForceCleanup();
274 
275  CGF.EmitBranchThroughCleanup(Cont);
276  }
277 
278  // Go back to the try-statement fallthrough.
279  CGF.Builder.restoreIP(SavedIP);
280 
281  // Pop out of the finally.
282  if (!useFunclets && S.getFinallyStmt())
283  FinallyInfo.exit(CGF);
284 
285  if (Cont.isValid())
286  CGF.EmitBlock(Cont.getBlock());
287 }
288 
290  llvm::Value *exn,
291  const VarDecl *paramDecl) {
292 
293  Address paramAddr = CGF.GetAddrOfLocalVar(paramDecl);
294 
295  switch (paramDecl->getType().getQualifiers().getObjCLifetime()) {
297  exn = CGF.EmitARCRetainNonBlock(exn);
298  [[fallthrough]];
299 
303  CGF.Builder.CreateStore(exn, paramAddr);
304  return;
305 
307  CGF.EmitARCInitWeak(paramAddr, exn);
308  return;
309  }
310  llvm_unreachable("invalid ownership qualifier");
311 }
312 
313 namespace {
314  struct CallSyncExit final : EHScopeStack::Cleanup {
315  llvm::FunctionCallee SyncExitFn;
316  llvm::Value *SyncArg;
317  CallSyncExit(llvm::FunctionCallee SyncExitFn, llvm::Value *SyncArg)
318  : SyncExitFn(SyncExitFn), SyncArg(SyncArg) {}
319 
320  void Emit(CodeGenFunction &CGF, Flags flags) override {
321  CGF.EmitNounwindRuntimeCall(SyncExitFn, SyncArg);
322  }
323  };
324 }
325 
327  const ObjCAtSynchronizedStmt &S,
328  llvm::FunctionCallee syncEnterFn,
329  llvm::FunctionCallee syncExitFn) {
330  CodeGenFunction::RunCleanupsScope cleanups(CGF);
331 
332  // Evaluate the lock operand. This is guaranteed to dominate the
333  // ARC release and lock-release cleanups.
334  const Expr *lockExpr = S.getSynchExpr();
335  llvm::Value *lock;
336  if (CGF.getLangOpts().ObjCAutoRefCount) {
337  lock = CGF.EmitARCRetainScalarExpr(lockExpr);
338  lock = CGF.EmitObjCConsumeObject(lockExpr->getType(), lock);
339  } else {
340  lock = CGF.EmitScalarExpr(lockExpr);
341  }
342  lock = CGF.Builder.CreateBitCast(lock, CGF.VoidPtrTy);
343 
344  // Acquire the lock.
345  CGF.Builder.CreateCall(syncEnterFn, lock)->setDoesNotThrow();
346 
347  // Register an all-paths cleanup to release the lock.
348  CGF.EHStack.pushCleanup<CallSyncExit>(NormalAndEHCleanup, syncExitFn, lock);
349 
350  // Emit the body of the statement.
351  CGF.EmitStmt(S.getSynchBody());
352 }
353 
354 /// Compute the pointer-to-function type to which a message send
355 /// should be casted in order to correctly call the given method
356 /// with the given arguments.
357 ///
358 /// \param method - may be null
359 /// \param resultType - the result type to use if there's no method
360 /// \param callArgs - the actual arguments, including implicit ones
363  QualType resultType,
365  unsigned ProgramAS = CGM.getDataLayout().getProgramAddressSpace();
366 
367  // If there's a method, use information from that.
368  if (method) {
369  const CGFunctionInfo &signature =
371 
372  llvm::PointerType *signatureType =
373  CGM.getTypes().GetFunctionType(signature)->getPointerTo(ProgramAS);
374 
375  const CGFunctionInfo &signatureForCall =
376  CGM.getTypes().arrangeCall(signature, callArgs);
377 
378  return MessageSendInfo(signatureForCall, signatureType);
379  }
380 
381  // There's no method; just use a default CC.
382  const CGFunctionInfo &argsInfo =
384 
385  // Derive the signature to call from that.
386  llvm::PointerType *signatureType =
387  CGM.getTypes().GetFunctionType(argsInfo)->getPointerTo(ProgramAS);
388  return MessageSendInfo(argsInfo, signatureType);
389 }
390 
392  const ObjCMethodDecl *method,
393  bool isSuper,
394  const ObjCInterfaceDecl *classReceiver,
395  llvm::Value *receiver) {
396  // Super dispatch assumes that self is non-null; even the messenger
397  // doesn't have a null check internally.
398  if (isSuper)
399  return false;
400 
401  // If this is a direct dispatch of a class method, check whether the class,
402  // or anything in its hierarchy, was weak-linked.
403  if (classReceiver && method && method->isClassMethod())
404  return isWeakLinkedClass(classReceiver);
405 
406  // If we're emitting a method, and self is const (meaning just ARC, for now),
407  // and the receiver is a load of self, then self is a valid object.
408  if (auto curMethod =
409  dyn_cast_or_null<ObjCMethodDecl>(CGF.CurCodeDecl)) {
410  auto self = curMethod->getSelfDecl();
411  if (self->getType().isConstQualified()) {
412  if (auto LI = dyn_cast<llvm::LoadInst>(receiver->stripPointerCasts())) {
413  llvm::Value *selfAddr = CGF.GetAddrOfLocalVar(self).getPointer();
414  if (selfAddr == LI->getPointerOperand()) {
415  return false;
416  }
417  }
418  }
419  }
420 
421  // Otherwise, assume it can be null.
422  return true;
423 }
424 
426  do {
427  if (ID->isWeakImported())
428  return true;
429  } while ((ID = ID->getSuperClass()));
430 
431  return false;
432 }
433 
435  const ObjCMethodDecl *method,
436  const CallArgList &callArgs) {
437  CallArgList::const_iterator I = callArgs.begin();
438  for (auto i = method->param_begin(), e = method->param_end();
439  i != e; ++i, ++I) {
440  const ParmVarDecl *param = (*i);
441  if (param->hasAttr<NSConsumedAttr>()) {
442  RValue RV = I->getRValue(CGF);
443  assert(RV.isScalar() &&
444  "NullReturnState::complete - arg not on object");
446  } else {
447  QualType QT = param->getType();
448  auto *RT = QT->getAs<RecordType>();
449  if (RT && RT->getDecl()->isParamDestroyedInCallee()) {
450  RValue RV = I->getRValue(CGF);
452  switch (DtorKind) {
454  CGF.destroyCXXObject(CGF, RV.getAggregateAddress(), QT);
455  break;
458  break;
459  default:
460  llvm_unreachable("unexpected dtor kind");
461  break;
462  }
463  }
464  }
465  }
466 }
467 
468 llvm::Constant *
470  const ObjCProtocolDecl *protocol) {
471  return CGM.getObjCRuntime().GetOrEmitProtocol(protocol);
472 }
473 
475  bool includeCategoryName) {
476  std::string buffer;
477  llvm::raw_string_ostream out(buffer);
479  /*includePrefixByte=*/true,
480  includeCategoryName);
481  return buffer;
482 }
clang::ObjCInterfaceDecl
Represents an ObjC class declaration.
Definition: DeclObjC.h:1148
clang::CodeGen::CodeGenFunction::destroyCXXObject
static Destroyer destroyCXXObject
Definition: CodeGenFunction.h:2912
clang::MangleContext::mangleObjCMethodName
void mangleObjCMethodName(const ObjCMethodDecl *MD, raw_ostream &OS, bool includePrefixByte=true, bool includeCategoryNamespace=true)
Definition: Mangle.cpp:325
clang::CodeGen::CodeGenFunction::EmitARCRetainNonBlock
llvm::Value * EmitARCRetainNonBlock(llvm::Value *value)
Retain the given object, with normal retain semantics.
Definition: CGObjC.cpp:2316
clang::FieldDecl::getBitWidthValue
unsigned getBitWidthValue(const ASTContext &Ctx) const
Definition: Decl.cpp:4300
clang::QualType::DK_nontrivial_c_struct
@ DK_nontrivial_c_struct
Definition: Type.h:1280
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:67
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:2279
clang::CodeGen::CodeGenFunction::EmitObjCConsumeObject
llvm::Value * EmitObjCConsumeObject(QualType T, llvm::Value *Ptr)
Produce the code for a CK_ARCConsumeObject.
Definition: CGObjC.cpp:2118
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:560
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:2565
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:519
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:326
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:54
llvm::SmallVector
Definition: LLVM.h:38
clang::QualType::getQualifiers
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6662
clang::CodeGen::CGCXXABI::getMangleContext
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:117
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:1326
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:1414
CGRecordLayout.h
clang::QualType
A (possibly-)qualified type.
Definition: Type.h:737
clang::CodeGen::CodeGenModule::getContext
ASTContext & getContext() const
Definition: CodeGenModule.h:728
clang::ParmVarDecl
Represents a parameter to a function.
Definition: Decl.h:1712
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:2428
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:362
clang::CodeGen::CGBuilderTy::CreateStore
llvm::StoreInst * CreateStore(llvm::Value *Val, Address Addr, bool IsVolatile=false)
Definition: CGBuilder.h:99
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:434
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:486
clang::ASTContext::toBits
int64_t toBits(CharUnits CharSize) const
Convert a size in characters to a size in bits.
Definition: ASTContext.cpp:2510
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:2453
clang::CodeGen::CodeGenTypeCache::VoidPtrTy
llvm::PointerType * VoidPtrTy
Definition: CodeGenTypeCache.h:56
clang::CodeGen::CodeGenFunction::CurSEHParent
GlobalDecl CurSEHParent
Definition: CodeGenFunction.h:542
clang::CodeGen::CodeGenFunction::GetAddrOfLocalVar
Address GetAddrOfLocalVar(const VarDecl *VD)
GetAddrOfLocalVar - Return the address of a local variable.
Definition: CodeGenFunction.h:2718
Offset
unsigned Offset
Definition: Format.cpp:2717
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:329
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:1277
clang::TypeInfo
Definition: ASTContext.h:152
V
#define V(N, I)
Definition: ASTContext.h:3208
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:4816
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:469
clang::CodeGen::CodeGenFunction::EmitStmt
void EmitStmt(const Stmt *S, ArrayRef< const Attr * > Attrs=std::nullopt)
EmitStmt - Emit the code for the statement.
Definition: CGStmt.cpp:53
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:618
clang::CodeGen::CodeGenFunction::pushSEHCleanup
void pushSEHCleanup(CleanupKind kind, llvm::Function *FinallyFunc)
Definition: CGException.cpp:2148
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
hlsl::uint64_t
unsigned long uint64_t
Definition: hlsl_basic_types.h:25
clang::CodeGen::CGObjCRuntime::getSymbolNameForMethod
std::string getSymbolNameForMethod(const ObjCMethodDecl *method, bool includeCategoryName=true)
Definition: CGObjCRuntime.cpp:474
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:7386
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:906
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:755
clang::ObjCAtFinallyStmt
Represents Objective-C's @finally statement.
Definition: StmtObjC.h:127
clang::CodeGen::CodeGenFunction::getLLVMContext
llvm::LLVMContext & getLLVMContext()
Definition: CodeGenFunction.h:2027
clang::CodeGen::CodeGenFunction::getContext
ASTContext & getContext() const
Definition: CodeGenFunction.h:1984
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:327
clang::CodeGen::CGObjCRuntime::EmitInitOfCatchParam
void EmitInitOfCatchParam(CodeGenFunction &CGF, llvm::Value *exn, const VarDecl *paramDecl)
Definition: CGObjCRuntime.cpp:289
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:1150
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:3475
clang::CodeGen::CodeGenModule::getTarget
const TargetInfo & getTarget() const
Definition: CodeGenModule.h:743
clang::QualType::withCVRQualifiers
QualType withCVRQualifiers(unsigned CVR) const
Definition: Type.h:934
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:1617
clang::CodeGen::CodeGenModule::getDataLayout
const llvm::DataLayout & getDataLayout() const
Definition: CodeGenModule.h:740
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:189
clang::FieldDecl::isBitField
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:3008
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:748
clang::CodeGen::CodeGenModule
This class organizes the cross-function state that is used while generating LLVM code.
Definition: CodeGenModule.h:279
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:2459
clang::CodeGen::CodeGenFunction::LexicalScope
Definition: CodeGenFunction.h:931
clang::QualType::DestructionKind
DestructionKind
Definition: Type.h:1275
clang::CodeGen::CGObjCRuntime::ComputeBitfieldBitOffset
unsigned ComputeBitfieldBitOffset(CodeGen::CodeGenModule &CGM, const ObjCInterfaceDecl *ID, const ObjCIvarDecl *Ivar)
Definition: CGObjCRuntime.cpp:46
llvm::SaveAndRestore
Definition: LLVM.h:44
clang::CodeGen::CodeGenFunction::ConvertType
llvm::Type * ConvertType(QualType T)
Definition: CodeGenFunction.cpp:214
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:391
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:168
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:4572
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:5041
clang::CodeGen::CodeGenFunction::destroyNonTrivialCStruct
static Destroyer destroyNonTrivialCStruct
Definition: CodeGenFunction.h:4357
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:52
clang::CodeGen::CGObjCRuntime::getCatchAllTypeInfo
virtual CatchTypeInfo getCatchAllTypeInfo()
Definition: CGObjCRuntime.h:148
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:2505
clang::Qualifiers::getObjCLifetime
ObjCLifetime getObjCLifetime() const
Definition: Type.h:352
clang::DeclaratorContext::Block
@ Block
clang::Stmt
Stmt - This represents one statement.
Definition: Stmt.h:71
clang::ObjCIvarDecl
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1920
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:425
clang::ObjCProtocolDecl
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2049
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:1996
clang::CodeGen::RValue::isScalar
bool isScalar() const
Definition: CGValue.h:54
clang::TargetInfo::getCharAlign
unsigned getCharAlign() const
Definition: TargetInfo.h:466
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:719
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:3433
clang::CodeGen::CodeGenFunction::EmitARCInitWeak
void EmitARCInitWeak(Address addr, llvm::Value *value)
i8* @objc_initWeak(i8** addr, i8* value) Returns value.
Definition: CGObjC.cpp:2642
clang::CodeGen::CatchRetScope
Definition: CGCXXABI.h:671
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:31
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:144
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:1868
clang::ValueDecl::getType
QualType getType() const
Definition: Decl.h:712
clang::Expr
This represents one expression.
Definition: Expr.h:109
clang::CodeGen::CodeGenFunction::FinallyInfo::exit
void exit(CodeGenFunction &CGF)
Definition: CGException.cpp:1467
clang::ObjCInterfaceDecl::getTypeForDecl
const Type * getTypeForDecl() const
Definition: DeclObjC.h:1894
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:1086
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:1287
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:438
clang::ASTContext::getObjCObjectPointerType
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
Definition: ASTContext.cpp:5599
clang::CodeGen::CallArgList
CallArgList - Type for representing both the value and type of arguments in a call.
Definition: CGCall.h:259
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:563
clang::CodeGen::CodeGenFunction::getLangOpts
const LangOptions & getLangOpts() const
Definition: CodeGenFunction.h:1997
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