clang 19.0.0git
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::Value *V = BaseValue;
67 V = CGF.Builder.CreateInBoundsGEP(CGF.Int8Ty, V, Offset, "add.ptr");
68
69 if (!Ivar->isBitField()) {
70 LValue LV = CGF.MakeNaturalAlignRawAddrLValue(V, IvarTy);
71 return LV;
72 }
73
74 // We need to compute an access strategy for this bit-field. We are given the
75 // offset to the first byte in the bit-field, the sub-byte offset is taken
76 // from the original layout. We reuse the normal bit-field access strategy by
77 // treating this as an access to a struct where the bit-field is in byte 0,
78 // and adjust the containing type size as appropriate.
79 //
80 // FIXME: Note that currently we make a very conservative estimate of the
81 // alignment of the bit-field, because (a) it is not clear what guarantees the
82 // runtime makes us, and (b) we don't have a way to specify that the struct is
83 // at an alignment plus offset.
84 //
85 // Note, there is a subtle invariant here: we can only call this routine on
86 // non-synthesized ivars but we may be called for synthesized ivars. However,
87 // a synthesized ivar can never be a bit-field, so this is safe.
88 uint64_t FieldBitOffset =
89 CGF.CGM.getContext().lookupFieldBitOffset(OID, nullptr, Ivar);
90 uint64_t BitOffset = FieldBitOffset % CGF.CGM.getContext().getCharWidth();
91 uint64_t AlignmentBits = CGF.CGM.getTarget().getCharAlign();
92 uint64_t BitFieldSize = Ivar->getBitWidthValue(CGF.getContext());
93 CharUnits StorageSize = CGF.CGM.getContext().toCharUnitsFromBits(
94 llvm::alignTo(BitOffset + BitFieldSize, AlignmentBits));
95 CharUnits Alignment = CGF.CGM.getContext().toCharUnitsFromBits(AlignmentBits);
96
97 // Allocate a new CGBitFieldInfo object to describe this access.
98 //
99 // FIXME: This is incredibly wasteful, these should be uniqued or part of some
100 // layout object. However, this is blocked on other cleanups to the
101 // Objective-C code, so for now we just live with allocating a bunch of these
102 // objects.
103 CGBitFieldInfo *Info = new (CGF.CGM.getContext()) CGBitFieldInfo(
104 CGBitFieldInfo::MakeInfo(CGF.CGM.getTypes(), Ivar, BitOffset, BitFieldSize,
105 CGF.CGM.getContext().toBits(StorageSize),
107
108 Address Addr =
109 Address(V, llvm::Type::getIntNTy(CGF.getLLVMContext(), Info->StorageSize),
110 Alignment);
111
112 return LValue::MakeBitfield(Addr, *Info, IvarTy,
115}
116
117namespace {
118 struct CatchHandler {
119 const VarDecl *Variable;
120 const Stmt *Body;
121 llvm::BasicBlock *Block;
122 llvm::Constant *TypeInfo;
123 /// Flags used to differentiate cleanups and catchalls in Windows SEH
124 unsigned Flags;
125 };
126
127 struct CallObjCEndCatch final : EHScopeStack::Cleanup {
128 CallObjCEndCatch(bool MightThrow, llvm::FunctionCallee Fn)
129 : MightThrow(MightThrow), Fn(Fn) {}
130 bool MightThrow;
131 llvm::FunctionCallee Fn;
132
133 void Emit(CodeGenFunction &CGF, Flags flags) override {
134 if (MightThrow)
136 else
138 }
139 };
140}
141
143 const ObjCAtTryStmt &S,
144 llvm::FunctionCallee beginCatchFn,
145 llvm::FunctionCallee endCatchFn,
146 llvm::FunctionCallee exceptionRethrowFn) {
147 // Jump destination for falling out of catch bodies.
149 if (S.getNumCatchStmts())
150 Cont = CGF.getJumpDestInCurrentScope("eh.cont");
151
152 bool useFunclets = EHPersonality::get(CGF).usesFuncletPads();
153
155 if (!useFunclets)
156 if (const ObjCAtFinallyStmt *Finally = S.getFinallyStmt())
157 FinallyInfo.enter(CGF, Finally->getFinallyBody(),
158 beginCatchFn, endCatchFn, exceptionRethrowFn);
159
161
162
163 // Enter the catch, if there is one.
164 if (S.getNumCatchStmts()) {
165 for (const ObjCAtCatchStmt *CatchStmt : S.catch_stmts()) {
166 const VarDecl *CatchDecl = CatchStmt->getCatchParamDecl();
167
168 Handlers.push_back(CatchHandler());
169 CatchHandler &Handler = Handlers.back();
170 Handler.Variable = CatchDecl;
171 Handler.Body = CatchStmt->getCatchBody();
172 Handler.Block = CGF.createBasicBlock("catch");
173 Handler.Flags = 0;
174
175 // @catch(...) always matches.
176 if (!CatchDecl) {
177 auto catchAll = getCatchAllTypeInfo();
178 Handler.TypeInfo = catchAll.RTTI;
179 Handler.Flags = catchAll.Flags;
180 // Don't consider any other catches.
181 break;
182 }
183
184 Handler.TypeInfo = GetEHType(CatchDecl->getType());
185 }
186
187 EHCatchScope *Catch = CGF.EHStack.pushCatch(Handlers.size());
188 for (unsigned I = 0, E = Handlers.size(); I != E; ++I)
189 Catch->setHandler(I, { Handlers[I].TypeInfo, Handlers[I].Flags }, Handlers[I].Block);
190 }
191
192 if (useFunclets)
193 if (const ObjCAtFinallyStmt *Finally = S.getFinallyStmt()) {
194 CodeGenFunction HelperCGF(CGM, /*suppressNewContext=*/true);
195 if (!CGF.CurSEHParent)
196 CGF.CurSEHParent = cast<NamedDecl>(CGF.CurFuncDecl);
197 // Outline the finally block.
198 const Stmt *FinallyBlock = Finally->getFinallyBody();
199 HelperCGF.startOutlinedSEHHelper(CGF, /*isFilter*/false, FinallyBlock);
200
201 // Emit the original filter expression, convert to i32, and return.
202 HelperCGF.EmitStmt(FinallyBlock);
203
204 HelperCGF.FinishFunction(FinallyBlock->getEndLoc());
205
206 llvm::Function *FinallyFunc = HelperCGF.CurFn;
207
208
209 // Push a cleanup for __finally blocks.
210 CGF.pushSEHCleanup(NormalAndEHCleanup, FinallyFunc);
211 }
212
213
214 // Emit the try body.
215 CGF.EmitStmt(S.getTryBody());
216
217 // Leave the try.
218 if (S.getNumCatchStmts())
219 CGF.popCatchScope();
220
221 // Remember where we were.
222 CGBuilderTy::InsertPoint SavedIP = CGF.Builder.saveAndClearIP();
223
224 // Emit the handlers.
225 for (unsigned I = 0, E = Handlers.size(); I != E; ++I) {
226 CatchHandler &Handler = Handlers[I];
227
228 CGF.EmitBlock(Handler.Block);
229
230 CodeGenFunction::LexicalScope Cleanups(CGF, Handler.Body->getSourceRange());
231 SaveAndRestore RevertAfterScope(CGF.CurrentFuncletPad);
232 if (useFunclets) {
233 llvm::Instruction *CPICandidate = Handler.Block->getFirstNonPHI();
234 if (auto *CPI = dyn_cast_or_null<llvm::CatchPadInst>(CPICandidate)) {
235 CGF.CurrentFuncletPad = CPI;
236 CPI->setOperand(2, CGF.getExceptionSlot().emitRawPointer(CGF));
237 CGF.EHStack.pushCleanup<CatchRetScope>(NormalCleanup, CPI);
238 }
239 }
240
241 llvm::Value *RawExn = CGF.getExceptionFromSlot();
242
243 // Enter the catch.
244 llvm::Value *Exn = RawExn;
245 if (beginCatchFn)
246 Exn = CGF.EmitNounwindRuntimeCall(beginCatchFn, RawExn, "exn.adjusted");
247
248 if (endCatchFn) {
249 // Add a cleanup to leave the catch.
250 bool EndCatchMightThrow = (Handler.Variable == nullptr);
251
252 CGF.EHStack.pushCleanup<CallObjCEndCatch>(NormalAndEHCleanup,
253 EndCatchMightThrow,
254 endCatchFn);
255 }
256
257 // Bind the catch parameter if it exists.
258 if (const VarDecl *CatchParam = Handler.Variable) {
259 llvm::Type *CatchType = CGF.ConvertType(CatchParam->getType());
260 llvm::Value *CastExn = CGF.Builder.CreateBitCast(Exn, CatchType);
261
262 CGF.EmitAutoVarDecl(*CatchParam);
263 EmitInitOfCatchParam(CGF, CastExn, CatchParam);
264 }
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 [[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
311namespace {
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) {
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,
362 CallArgList &callArgs) {
363 unsigned ProgramAS = CGM.getDataLayout().getProgramAddressSpace();
364
365 llvm::PointerType *signatureType =
366 llvm::PointerType::get(CGM.getLLVMContext(), ProgramAS);
367
368 // If there's a method, use information from that.
369 if (method) {
370 const CGFunctionInfo &signature =
371 CGM.getTypes().arrangeObjCMessageSendSignature(method, callArgs[0].Ty);
372
373 const CGFunctionInfo &signatureForCall =
374 CGM.getTypes().arrangeCall(signature, callArgs);
375
376 return MessageSendInfo(signatureForCall, signatureType);
377 }
378
379 // There's no method; just use a default CC.
380 const CGFunctionInfo &argsInfo =
381 CGM.getTypes().arrangeUnprototypedObjCMessageSend(resultType, callArgs);
382
383 return MessageSendInfo(argsInfo, signatureType);
384}
385
387 const ObjCMethodDecl *method,
388 bool isSuper,
389 const ObjCInterfaceDecl *classReceiver,
390 llvm::Value *receiver) {
391 // Super dispatch assumes that self is non-null; even the messenger
392 // doesn't have a null check internally.
393 if (isSuper)
394 return false;
395
396 // If this is a direct dispatch of a class method, check whether the class,
397 // or anything in its hierarchy, was weak-linked.
398 if (classReceiver && method && method->isClassMethod())
399 return isWeakLinkedClass(classReceiver);
400
401 // If we're emitting a method, and self is const (meaning just ARC, for now),
402 // and the receiver is a load of self, then self is a valid object.
403 if (auto curMethod =
404 dyn_cast_or_null<ObjCMethodDecl>(CGF.CurCodeDecl)) {
405 auto self = curMethod->getSelfDecl();
406 if (self->getType().isConstQualified()) {
407 if (auto LI = dyn_cast<llvm::LoadInst>(receiver->stripPointerCasts())) {
408 llvm::Value *selfAddr = CGF.GetAddrOfLocalVar(self).emitRawPointer(CGF);
409 if (selfAddr == LI->getPointerOperand()) {
410 return false;
411 }
412 }
413 }
414 }
415
416 // Otherwise, assume it can be null.
417 return true;
418}
419
421 do {
422 if (ID->isWeakImported())
423 return true;
424 } while ((ID = ID->getSuperClass()));
425
426 return false;
427}
428
430 const ObjCMethodDecl *method,
431 const CallArgList &callArgs) {
432 CallArgList::const_iterator I = callArgs.begin();
433 for (auto i = method->param_begin(), e = method->param_end();
434 i != e; ++i, ++I) {
435 const ParmVarDecl *param = (*i);
436 if (param->hasAttr<NSConsumedAttr>()) {
437 RValue RV = I->getRValue(CGF);
438 assert(RV.isScalar() &&
439 "NullReturnState::complete - arg not on object");
441 } else {
442 QualType QT = param->getType();
443 auto *RT = QT->getAs<RecordType>();
444 if (RT && RT->getDecl()->isParamDestroyedInCallee()) {
445 RValue RV = I->getRValue(CGF);
447 switch (DtorKind) {
449 CGF.destroyCXXObject(CGF, RV.getAggregateAddress(), QT);
450 break;
453 break;
454 default:
455 llvm_unreachable("unexpected dtor kind");
456 break;
457 }
458 }
459 }
460 }
461}
462
463llvm::Constant *
465 const ObjCProtocolDecl *protocol) {
466 return CGM.getObjCRuntime().GetOrEmitProtocol(protocol);
467}
468
470 bool includeCategoryName) {
471 std::string buffer;
472 llvm::raw_string_ostream out(buffer);
474 /*includePrefixByte=*/true,
475 includeCategoryName);
476 return buffer;
477}
#define V(N, I)
Definition: ASTContext.h:3323
Expr * E
const CFGBlock * Block
Definition: HTMLLogger.cpp:153
VarDecl * Variable
Definition: SemaObjC.cpp:756
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:2386
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
Like RawAddress, an abstract representation of an aligned address, but the pointer contained in this ...
Definition: Address.h:111
llvm::Value * emitRawPointer(CodeGenFunction &CGF) const
Return the pointer contained in this class after authenticating it and adding offset to it if necessa...
Definition: Address.h:220
llvm::StoreInst * CreateStore(llvm::Value *Val, Address Addr, bool IsVolatile=false)
Definition: CGBuilder.h:135
Address CreateInBoundsGEP(Address Addr, ArrayRef< llvm::Value * > IdxList, llvm::Type *ElementType, CharUnits Align, const Twine &Name="")
Definition: CGBuilder.h:344
MangleContext & getMangleContext()
Gets the mangle context.
Definition: CGCXXABI.h:113
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:274
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)
LValue MakeNaturalAlignRawAddrLValue(llvm::Value *V, QualType T)
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="")
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
llvm::LLVMContext & getLLVMContext()
CGObjCRuntime & getObjCRuntime()
Return a reference to the configured Objective-C runtime.
const CGFunctionInfo & arrangeUnprototypedObjCMessageSend(QualType returnType, const CallArgList &args)
Definition: CGCall.cpp:533
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:500
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:729
A scope which attempts to handle some, possibly all, types of exceptions.
Definition: CGCleanup.h:158
void setHandler(unsigned I, llvm::Constant *Type, llvm::BasicBlock *Block)
Definition: CGCleanup.h:207
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:235
LValue - This represents an lvalue references.
Definition: CGValue.h:181
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:473
RValue - This trivial value class is used to represent the result of an expression that is evaluated.
Definition: CGValue.h:41
bool isScalar() const
Definition: CGValue.h:63
Address getAggregateAddress() const
getAggregateAddr() - Return the Value* of the address of the aggregate.
Definition: CGValue.h:82
llvm::Value * getScalarVal() const
getScalarVal() - Return the Value* of this scalar value.
Definition: CGValue.h:70
bool hasAttr() const
Definition: DeclBase.h:583
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:3160
unsigned getBitWidthValue(const ASTContext &Ctx) const
Computes the bit width of this field, if this is a bit field.
Definition: Decl.cpp:4580
void mangleObjCMethodName(const ObjCMethodDecl *MD, raw_ostream &OS, bool includePrefixByte=true, bool includeCategoryNamespace=true)
Definition: Mangle.cpp:328
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:303
Represents Objective-C's @try ... @catch ... @finally statement.
Definition: StmtObjC.h:167
const ObjCInterfaceDecl * getClassInterface() const
Definition: DeclObjC.h:2483
ObjCImplementationDecl - Represents a class definition - this is where method definitions are specifi...
Definition: DeclObjC.h:2594
Represents an ObjC class declaration.
Definition: DeclObjC.h:1153
const Type * getTypeForDecl() const
Definition: DeclObjC.h:1917
ObjCIvarDecl - Represents an ObjC instance variable.
Definition: DeclObjC.h:1950
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:1899
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:140
param_const_iterator param_end() const
Definition: DeclObjC.h:358
param_const_iterator param_begin() const
Definition: DeclObjC.h:354
bool isClassMethod() const
Definition: DeclObjC.h:434
Represents an Objective-C protocol declaration.
Definition: DeclObjC.h:2082
Represents a parameter to a function.
Definition: Decl.h:1761
A (possibly-)qualified type.
Definition: Type.h:942
@ DK_cxx_destructor
Definition: Type.h:1533
@ DK_nontrivial_c_struct
Definition: Type.h:1536
Qualifiers getQualifiers() const
Retrieve the set of qualifiers applied to this type.
Definition: Type.h:7784
QualType withCVRQualifiers(unsigned CVR) const
Definition: Type.h:1187
DestructionKind isDestructedType() const
Returns a nonzero value if objects of this type require non-trivial work to clean up after.
Definition: Type.h:1543
@ OCL_Strong
Assigning into this object requires the old value to be released and the new value to be retained.
Definition: Type.h:349
@ OCL_ExplicitNone
This object can be modified without requiring retains or releases.
Definition: Type.h:342
@ OCL_None
There is no lifetime qualification on this type.
Definition: Type.h:338
@ OCL_Weak
Reading or writing from this object requires a barrier call.
Definition: Type.h:352
@ OCL_Autoreleasing
Assigning into this object requires a lifetime extension.
Definition: Type.h:355
ObjCLifetime getObjCLifetime() const
Definition: Type.h:533
A helper class that allows the use of isa/cast/dyncast to detect TagType objects of structs/unions/cl...
Definition: Type.h:5937
Stmt - This represents one statement.
Definition: Stmt.h:84
SourceLocation getEndLoc() const LLVM_READONLY
Definition: Stmt.cpp:350
unsigned getCharAlign() const
Definition: TargetInfo.h:497
const T * getAs() const
Member-template getAs<specific type>'.
Definition: Type.h:8517
QualType getType() const
Definition: Decl.h:717
Represents a variable declaration or definition.
Definition: Decl.h:918
@ 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:135
The JSON file list parser is used to communicate input to InstallAPI.
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:684