clang 17.0.0git
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"
22#include "clang/AST/StmtObjC.h"
25#include "llvm/IR/Instruction.h"
26#include "llvm/Support/SaveAndRestore.h"
27
28using namespace clang;
29using 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,
117}
118
119namespace {
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)
138 else
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
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
313namespace {
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) {
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,
364 CallArgList &callArgs) {
365 unsigned ProgramAS = CGM.getDataLayout().getProgramAddressSpace();
366
367 // If there's a method, use information from that.
368 if (method) {
369 const CGFunctionInfo &signature =
370 CGM.getTypes().arrangeObjCMessageSendSignature(method, callArgs[0].Ty);
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 =
383 CGM.getTypes().arrangeUnprototypedObjCMessageSend(resultType, callArgs);
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
468llvm::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}
#define V(N, I)
Definition: ASTContext.h:3217
unsigned Offset
Definition: Format.cpp:2778
Defines the Objective-C statement AST node classes.
QualType getObjCObjectPointerType(QualType OIT) const
Return a ObjCObjectPointerType type for the given ObjCObjectType.
int64_t toBits(CharUnits CharSize) const
Convert a size in characters to a size in bits.
uint64_t lookupFieldBitOffset(const ObjCInterfaceDecl *OID, const ObjCImplementationDecl *ID, const ObjCIvarDecl *Ivar) const
Get the offset of an ObjCIvarDecl in bits.
CharUnits toCharUnitsFromBits(int64_t BitSize) const
Convert a size in bits to a size in characters.
uint64_t getCharWidth() const
Return the size of the character type, in bits.
Definition: ASTContext.h:2283
CharUnits - This is an opaque type for sizes expressed in character units.
Definition: CharUnits.h:38
static CharUnits fromQuantity(QuantityType Quantity)
fromQuantity - Construct a CharUnits quantity from a raw integer type.
Definition: CharUnits.h:63
An aligned address.
Definition: Address.h:29
llvm::Value * getPointer() const
Definition: Address.h:54
llvm::StoreInst * CreateStore(llvm::Value *Val, Address Addr, bool IsVolatile=false)
Definition: CGBuilder.h:99
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:169
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:117
CGFunctionInfo - Class to encapsulate the information about a function definition.
virtual llvm::Constant * GetEHType(QualType T)=0
Get the type constant to catch for the given ObjC pointer type.
virtual CatchTypeInfo getCatchAllTypeInfo()
void EmitInitOfCatchParam(CodeGenFunction &CGF, llvm::Value *exn, const VarDecl *paramDecl)
bool canMessageReceiverBeNull(CodeGenFunction &CGF, const ObjCMethodDecl *method, bool isSuper, const ObjCInterfaceDecl *classReceiver, llvm::Value *receiver)
std::string getSymbolNameForMethod(const ObjCMethodDecl *method, bool includeCategoryName=true)
static void destroyCalleeDestroyedArguments(CodeGenFunction &CGF, const ObjCMethodDecl *method, const CallArgList &callArgs)
Destroy the callee-destroyed arguments of the given method, if it has any.
LValue EmitValueForIvarAtOffset(CodeGen::CodeGenFunction &CGF, const ObjCInterfaceDecl *OID, llvm::Value *BaseValue, const ObjCIvarDecl *Ivar, unsigned CVRQualifiers, llvm::Value *Offset)
uint64_t ComputeIvarBaseOffset(CodeGen::CodeGenModule &CGM, const ObjCInterfaceDecl *OID, const ObjCIvarDecl *Ivar)
Compute an offset to the given ivar, suitable for passing to EmitValueForIvarAtOffset.
static bool isWeakLinkedClass(const ObjCInterfaceDecl *cls)
virtual llvm::Constant * GetOrEmitProtocol(const ObjCProtocolDecl *PD)=0
GetOrEmitProtocol - Get the protocol object for the given declaration, emitting it if necessary.
void EmitTryCatchStmt(CodeGenFunction &CGF, const ObjCAtTryStmt &S, llvm::FunctionCallee beginCatchFn, llvm::FunctionCallee endCatchFn, llvm::FunctionCallee exceptionRethrowFn)
Emits a try / catch statement.
CodeGen::CodeGenModule & CGM
Definition: CGObjCRuntime.h:67
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...
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...
unsigned ComputeBitfieldBitOffset(CodeGen::CodeGenModule &CGM, const ObjCInterfaceDecl *ID, const ObjCIvarDecl *Ivar)
CallArgList - Type for representing both the value and type of arguments in a call.
Definition: CGCall.h:259
A class controlling the emission of a finally block.
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.
void ForceCleanup()
Force the emission of cleanups now, instead of waiting until this object is destroyed.
Enters a new scope for capturing cleanups, all of which will be executed once the scope is exited.
CodeGenFunction - This class organizes the per-function state that is used while generating LLVM code...
void FinishFunction(SourceLocation EndLoc=SourceLocation())
FinishFunction - Complete IR generation of the current function.
Address getExceptionSlot()
Returns a pointer to the function's exception object and selector slot, which is assigned in every la...
static Destroyer destroyNonTrivialCStruct
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...
void startOutlinedSEHHelper(CodeGenFunction &ParentCGF, bool IsFilter, const Stmt *OutlinedStmt)
void EmitAutoVarDecl(const VarDecl &D)
EmitAutoVarDecl - Emit an auto variable declaration.
void popCatchScope()
popCatchScope - Pops the catch scope at the top of the EHScope stack, emitting any required code (oth...
llvm::BasicBlock * createBasicBlock(const Twine &name="", llvm::Function *parent=nullptr, llvm::BasicBlock *before=nullptr)
createBasicBlock - Create an LLVM basic block.
const LangOptions & getLangOpts() const
void EmitBlock(llvm::BasicBlock *BB, bool IsFinished=false)
EmitBlock - Emit the given block.
SmallVector< llvm::Value *, 8 > ObjCEHValueStack
ObjCEHValueStack - Stack of Objective-C exception values, used for rethrows.
const Decl * CurCodeDecl
CurCodeDecl - This is the inner-most code context, which includes blocks.
llvm::Value * EmitObjCConsumeObject(QualType T, llvm::Value *Ptr)
void EmitARCRelease(llvm::Value *value, ARCPreciseLifetime_t precise)
void pushSEHCleanup(CleanupKind kind, llvm::Function *FinallyFunc)
llvm::CallInst * EmitNounwindRuntimeCall(llvm::FunctionCallee callee, const Twine &name="")
const Decl * CurFuncDecl
CurFuncDecl - Holds the Decl for the current outermost non-closure context.
void EmitBranchThroughCleanup(JumpDest Dest)
EmitBranchThroughCleanup - Emit a branch from the current insert block through the normal cleanup han...
llvm::Type * ConvertType(QualType T)
void EmitARCInitWeak(Address addr, llvm::Value *value)
llvm::CallBase * EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee, ArrayRef< llvm::Value * > args, const Twine &name="")
LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T)
llvm::Value * EmitARCRetainNonBlock(llvm::Value *value)
Address GetAddrOfLocalVar(const VarDecl *VD)
GetAddrOfLocalVar - Return the address of a local variable.
llvm::Instruction * CurrentFuncletPad
void EmitStmt(const Stmt *S, ArrayRef< const Attr * > Attrs=std::nullopt)
EmitStmt - Emit the code for the statement.
llvm::LLVMContext & getLLVMContext()
llvm::Value * EmitScalarExpr(const Expr *E, bool IgnoreResultAssign=false)
EmitScalarExpr - Emit the computation of the specified expression of LLVM scalar type,...
llvm::Value * EmitARCRetainScalarExpr(const Expr *expr)
llvm::Value * getExceptionFromSlot()
Returns the contents of the function's exception object and selector slots.
This class organizes the cross-function state that is used while generating LLVM code.
const TargetInfo & getTarget() const
const llvm::DataLayout & getDataLayout() const
CGCXXABI & getCXXABI() const
ASTContext & getContext() const
CGObjCRuntime & getObjCRuntime()
Return a reference to the configured Objective-C runtime.
llvm::FunctionType * GetFunctionType(const CGFunctionInfo &Info)
GetFunctionType - Get the LLVM function type for.
Definition: CGCall.cpp:1618
const CGFunctionInfo & arrangeUnprototypedObjCMessageSend(QualType returnType, const CallArgList &args)
Definition: CGCall.cpp:520
llvm::Type * ConvertTypeForMem(QualType T, bool ForBitField=false)
ConvertTypeForMem - Convert type T into a llvm::Type.
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:487
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:720
A scope which attempts to handle some, possibly all, types of exceptions.
Definition: CGCleanup.h:146
void setHandler(unsigned I, llvm::Constant *Type, llvm::BasicBlock *Block)
Definition: CGCleanup.h:195
Information for lazily generating a cleanup.
Definition: EHScopeStack.h:141
class EHCatchScope * pushCatch(unsigned NumHandlers)
Push a set of catch handlers on the stack.
Definition: CGCleanup.cpp:259
LValue - This represents an lvalue references.
Definition: CGValue.h:171
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:468
RValue - This trivial value class is used to represent the result of an expression that is evaluated.
Definition: CGValue.h:39
bool isScalar() const
Definition: CGValue.h:54
Address getAggregateAddress() const
getAggregateAddr() - Return the Value* of the address of the aggregate.
Definition: CGValue.h:73
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
Definition: CGValue.h:61
bool hasAttr() const
Definition: DeclBase.h:560
This represents one expression.
Definition: Expr.h:110
QualType getType() const
Definition: Expr.h:142
bool isBitField() const
Determines whether this field is a bitfield.
Definition: Decl.h:3019
unsigned getBitWidthValue(const ASTContext &Ctx) const
Definition: Decl.cpp:4324
void mangleObjCMethodName(const ObjCMethodDecl *MD, raw_ostream &OS, bool includePrefixByte=true, bool includeCategoryNamespace=true)
Definition: Mangle.cpp:325
Represents Objective-C's @catch statement.
Definition: StmtObjC.h:77
Represents Objective-C's @finally statement.
Definition: StmtObjC.h:127
Represents Objective-C's @synchronized statement.
Definition: StmtObjC.h:302
Represents Objective-C's @try ... @catch ... @finally statement.
Definition: StmtObjC.h:167
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2472
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2584
Represents an ObjC class declaration.
Definition: DeclObjC.h:1147
const Type * getTypeForDecl() const
Definition: DeclObjC.h:1906
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1939
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:1905
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:138
param_const_iterator param_end() const
Definition: DeclObjC.h:360
param_const_iterator param_begin() const
Definition: DeclObjC.h:356
bool isClassMethod() const
Definition: DeclObjC.h:436
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2069
Represents a parameter to a function.
Definition: Decl.h:1722
A (possibly-)qualified type.
Definition: Type.h:736
@ DK_cxx_destructor
Definition: Type.h:1278
@ DK_nontrivial_c_struct
Definition: Type.h:1281
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:6689
QualType withCVRQualifiers(unsigned CVR) const
Definition: Type.h:935
DestructionKind isDestructedType() const
Returns a nonzero value if objects of this type require non-trivial work to clean up after.
Definition: Type.h:1288
@ OCL_Strong
Assigning into this object requires the old value to be released and the new value to be retained.
Definition: Type.h:174
@ OCL_ExplicitNone
This object can be modified without requiring retains or releases.
Definition: Type.h:167
@ OCL_None
There is no lifetime qualification on this type.
Definition: Type.h:163
@ OCL_Weak
Reading or writing from this object requires a barrier call.
Definition: Type.h:177
@ OCL_Autoreleasing
Assigning into this object requires a lifetime extension.
Definition: Type.h:180
ObjCLifetime getObjCLifetime() const
Definition: Type.h:351
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:4835
Stmt - This represents one statement.
Definition: Stmt.h:72
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:349
unsigned getCharAlign() const
Definition: TargetInfo.h:465
const T * getAs() const
Member-template getAs<specific type>'.
Definition: Type.h:7424
QualType getType() const
Definition: Decl.h:712
Represents a variable declaration or definition.
Definition: Decl.h:913
@ Decl
The l-value was an access to a declared entity or something equivalently strong, like the address of ...
@ NormalCleanup
Denotes a cleanup that should run when a scope is exited using normal control flow (falling off the e...
Definition: EHScopeStack.h:84
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...
@ ARCImpreciseLifetime
Definition: CGValue.h:125
Structure with information about how a bitfield should be accessed.
unsigned StorageSize
The storage size in bits which should be used when accessing this bitfield.
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...
A jump destination is an abstract label, branching to which may require a jump out through normal cle...
llvm::IntegerType * Int8Ty
i8, i16, i32, and i64
static const EHPersonality & get(CodeGenModule &CGM, const FunctionDecl *FD)
bool usesFuncletPads() const
Does this personality use landingpads or the family of pad instructions designed to form funclets?
Definition: CGCleanup.h:619