| //===--- CGNonTrivialStruct.cpp - Emit Special Functions for C Structs ----===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines functions to generate various special functions for C |
| // structs. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CodeGenFunction.h" |
| #include "CodeGenModule.h" |
| #include "clang/AST/NonTrivialTypeVisitor.h" |
| #include "clang/CodeGen/CodeGenABITypes.h" |
| #include "llvm/Support/ScopedPrinter.h" |
| #include <array> |
| |
| using namespace clang; |
| using namespace CodeGen; |
| |
| // Return the size of a field in number of bits. |
| static uint64_t getFieldSize(const FieldDecl *FD, QualType FT, |
| ASTContext &Ctx) { |
| if (FD && FD->isBitField()) |
| return FD->getBitWidthValue(Ctx); |
| return Ctx.getTypeSize(FT); |
| } |
| |
| namespace { |
| enum { DstIdx = 0, SrcIdx = 1 }; |
| const char *ValNameStr[2] = {"dst", "src"}; |
| |
| template <class Derived> struct StructVisitor { |
| StructVisitor(ASTContext &Ctx) : Ctx(Ctx) {} |
| |
| template <class... Ts> |
| void visitStructFields(QualType QT, CharUnits CurStructOffset, Ts... Args) { |
| const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); |
| |
| // Iterate over the fields of the struct. |
| for (const FieldDecl *FD : RD->fields()) { |
| QualType FT = FD->getType(); |
| FT = QT.isVolatileQualified() ? FT.withVolatile() : FT; |
| asDerived().visit(FT, FD, CurStructOffset, Args...); |
| } |
| |
| asDerived().flushTrivialFields(Args...); |
| } |
| |
| template <class... Ts> void visitTrivial(Ts... Args) {} |
| |
| template <class... Ts> void visitCXXDestructor(Ts... Args) { |
| llvm_unreachable("field of a C++ struct type is not expected"); |
| } |
| |
| template <class... Ts> void flushTrivialFields(Ts... Args) {} |
| |
| uint64_t getFieldOffsetInBits(const FieldDecl *FD) { |
| return FD ? Ctx.getASTRecordLayout(FD->getParent()) |
| .getFieldOffset(FD->getFieldIndex()) |
| : 0; |
| } |
| |
| CharUnits getFieldOffset(const FieldDecl *FD) { |
| return Ctx.toCharUnitsFromBits(getFieldOffsetInBits(FD)); |
| } |
| |
| Derived &asDerived() { return static_cast<Derived &>(*this); } |
| |
| ASTContext &getContext() { return Ctx; } |
| ASTContext &Ctx; |
| }; |
| |
| template <class Derived, bool IsMove> |
| struct CopyStructVisitor : StructVisitor<Derived>, |
| CopiedTypeVisitor<Derived, IsMove> { |
| using StructVisitor<Derived>::asDerived; |
| using Super = CopiedTypeVisitor<Derived, IsMove>; |
| |
| CopyStructVisitor(ASTContext &Ctx) : StructVisitor<Derived>(Ctx) {} |
| |
| template <class... Ts> |
| void preVisit(QualType::PrimitiveCopyKind PCK, QualType FT, |
| const FieldDecl *FD, CharUnits CurStructOffset, Ts &&... Args) { |
| if (PCK) |
| asDerived().flushTrivialFields(std::forward<Ts>(Args)...); |
| } |
| |
| template <class... Ts> |
| void visitWithKind(QualType::PrimitiveCopyKind PCK, QualType FT, |
| const FieldDecl *FD, CharUnits CurStructOffset, |
| Ts &&... Args) { |
| if (const auto *AT = asDerived().getContext().getAsArrayType(FT)) { |
| asDerived().visitArray(PCK, AT, FT.isVolatileQualified(), FD, |
| CurStructOffset, std::forward<Ts>(Args)...); |
| return; |
| } |
| |
| Super::visitWithKind(PCK, FT, FD, CurStructOffset, |
| std::forward<Ts>(Args)...); |
| } |
| |
| template <class... Ts> |
| void visitTrivial(QualType FT, const FieldDecl *FD, CharUnits CurStructOffset, |
| Ts... Args) { |
| assert(!FT.isVolatileQualified() && "volatile field not expected"); |
| ASTContext &Ctx = asDerived().getContext(); |
| uint64_t FieldSize = getFieldSize(FD, FT, Ctx); |
| |
| // Ignore zero-sized fields. |
| if (FieldSize == 0) |
| return; |
| |
| uint64_t FStartInBits = asDerived().getFieldOffsetInBits(FD); |
| uint64_t FEndInBits = FStartInBits + FieldSize; |
| uint64_t RoundedFEnd = llvm::alignTo(FEndInBits, Ctx.getCharWidth()); |
| |
| // Set Start if this is the first field of a sequence of trivial fields. |
| if (Start == End) |
| Start = CurStructOffset + Ctx.toCharUnitsFromBits(FStartInBits); |
| End = CurStructOffset + Ctx.toCharUnitsFromBits(RoundedFEnd); |
| } |
| |
| CharUnits Start = CharUnits::Zero(), End = CharUnits::Zero(); |
| }; |
| |
| // This function creates the mangled name of a special function of a non-trivial |
| // C struct. Since there is no ODR in C, the function is mangled based on the |
| // struct contents and not the name. The mangled name has the following |
| // structure: |
| // |
| // <function-name> ::= <prefix> <alignment-info> "_" <struct-field-info> |
| // <prefix> ::= "__destructor_" | "__default_constructor_" | |
| // "__copy_constructor_" | "__move_constructor_" | |
| // "__copy_assignment_" | "__move_assignment_" |
| // <alignment-info> ::= <dst-alignment> ["_" <src-alignment>] |
| // <struct-field-info> ::= <field-info>+ |
| // <field-info> ::= <struct-or-scalar-field-info> | <array-field-info> |
| // <struct-or-scalar-field-info> ::= "_S" <struct-field-info> | |
| // <strong-field-info> | <trivial-field-info> |
| // <array-field-info> ::= "_AB" <array-offset> "s" <element-size> "n" |
| // <num-elements> <innermost-element-info> "_AE" |
| // <innermost-element-info> ::= <struct-or-scalar-field-info> |
| // <strong-field-info> ::= "_s" ["b"] ["v"] <field-offset> |
| // <trivial-field-info> ::= "_t" ["v"] <field-offset> "_" <field-size> |
| |
| template <class Derived> struct GenFuncNameBase { |
| std::string getVolatileOffsetStr(bool IsVolatile, CharUnits Offset) { |
| std::string S; |
| if (IsVolatile) |
| S = "v"; |
| S += llvm::to_string(Offset.getQuantity()); |
| return S; |
| } |
| |
| void visitARCStrong(QualType FT, const FieldDecl *FD, |
| CharUnits CurStructOffset) { |
| appendStr("_s"); |
| if (FT->isBlockPointerType()) |
| appendStr("b"); |
| CharUnits FieldOffset = CurStructOffset + asDerived().getFieldOffset(FD); |
| appendStr(getVolatileOffsetStr(FT.isVolatileQualified(), FieldOffset)); |
| } |
| |
| void visitARCWeak(QualType FT, const FieldDecl *FD, |
| CharUnits CurStructOffset) { |
| appendStr("_w"); |
| CharUnits FieldOffset = CurStructOffset + asDerived().getFieldOffset(FD); |
| appendStr(getVolatileOffsetStr(FT.isVolatileQualified(), FieldOffset)); |
| } |
| |
| void visitStruct(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset) { |
| CharUnits FieldOffset = CurStructOffset + asDerived().getFieldOffset(FD); |
| appendStr("_S"); |
| asDerived().visitStructFields(QT, FieldOffset); |
| } |
| |
| template <class FieldKind> |
| void visitArray(FieldKind FK, const ArrayType *AT, bool IsVolatile, |
| const FieldDecl *FD, CharUnits CurStructOffset) { |
| // String for non-volatile trivial fields is emitted when |
| // flushTrivialFields is called. |
| if (!FK) |
| return asDerived().visitTrivial(QualType(AT, 0), FD, CurStructOffset); |
| |
| asDerived().flushTrivialFields(); |
| CharUnits FieldOffset = CurStructOffset + asDerived().getFieldOffset(FD); |
| ASTContext &Ctx = asDerived().getContext(); |
| const ConstantArrayType *CAT = cast<ConstantArrayType>(AT); |
| unsigned NumElts = Ctx.getConstantArrayElementCount(CAT); |
| QualType EltTy = Ctx.getBaseElementType(CAT); |
| CharUnits EltSize = Ctx.getTypeSizeInChars(EltTy); |
| appendStr("_AB" + llvm::to_string(FieldOffset.getQuantity()) + "s" + |
| llvm::to_string(EltSize.getQuantity()) + "n" + |
| llvm::to_string(NumElts)); |
| EltTy = IsVolatile ? EltTy.withVolatile() : EltTy; |
| asDerived().visitWithKind(FK, EltTy, nullptr, FieldOffset); |
| appendStr("_AE"); |
| } |
| |
| void appendStr(StringRef Str) { Name += Str; } |
| |
| std::string getName(QualType QT, bool IsVolatile) { |
| QT = IsVolatile ? QT.withVolatile() : QT; |
| asDerived().visitStructFields(QT, CharUnits::Zero()); |
| return Name; |
| } |
| |
| Derived &asDerived() { return static_cast<Derived &>(*this); } |
| |
| std::string Name; |
| }; |
| |
| template <class Derived> |
| struct GenUnaryFuncName : StructVisitor<Derived>, GenFuncNameBase<Derived> { |
| GenUnaryFuncName(StringRef Prefix, CharUnits DstAlignment, ASTContext &Ctx) |
| : StructVisitor<Derived>(Ctx) { |
| this->appendStr(Prefix); |
| this->appendStr(llvm::to_string(DstAlignment.getQuantity())); |
| } |
| }; |
| |
| // Helper function to create a null constant. |
| static llvm::Constant *getNullForVariable(Address Addr) { |
| llvm::Type *Ty = Addr.getElementType(); |
| return llvm::ConstantPointerNull::get(cast<llvm::PointerType>(Ty)); |
| } |
| |
| template <bool IsMove> |
| struct GenBinaryFuncName : CopyStructVisitor<GenBinaryFuncName<IsMove>, IsMove>, |
| GenFuncNameBase<GenBinaryFuncName<IsMove>> { |
| |
| GenBinaryFuncName(StringRef Prefix, CharUnits DstAlignment, |
| CharUnits SrcAlignment, ASTContext &Ctx) |
| : CopyStructVisitor<GenBinaryFuncName<IsMove>, IsMove>(Ctx) { |
| this->appendStr(Prefix); |
| this->appendStr(llvm::to_string(DstAlignment.getQuantity())); |
| this->appendStr("_" + llvm::to_string(SrcAlignment.getQuantity())); |
| } |
| |
| void flushTrivialFields() { |
| if (this->Start == this->End) |
| return; |
| |
| this->appendStr("_t" + llvm::to_string(this->Start.getQuantity()) + "w" + |
| llvm::to_string((this->End - this->Start).getQuantity())); |
| |
| this->Start = this->End = CharUnits::Zero(); |
| } |
| |
| void visitVolatileTrivial(QualType FT, const FieldDecl *FD, |
| CharUnits CurStructOffset) { |
| // Zero-length bit-fields don't need to be copied/assigned. |
| if (FD && FD->isZeroLengthBitField(this->Ctx)) |
| return; |
| |
| // Because volatile fields can be bit-fields and are individually copied, |
| // their offset and width are in bits. |
| uint64_t OffsetInBits = |
| this->Ctx.toBits(CurStructOffset) + this->getFieldOffsetInBits(FD); |
| this->appendStr("_tv" + llvm::to_string(OffsetInBits) + "w" + |
| llvm::to_string(getFieldSize(FD, FT, this->Ctx))); |
| } |
| }; |
| |
| struct GenDefaultInitializeFuncName |
| : GenUnaryFuncName<GenDefaultInitializeFuncName>, |
| DefaultInitializedTypeVisitor<GenDefaultInitializeFuncName> { |
| using Super = DefaultInitializedTypeVisitor<GenDefaultInitializeFuncName>; |
| GenDefaultInitializeFuncName(CharUnits DstAlignment, ASTContext &Ctx) |
| : GenUnaryFuncName<GenDefaultInitializeFuncName>("__default_constructor_", |
| DstAlignment, Ctx) {} |
| void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType FT, |
| const FieldDecl *FD, CharUnits CurStructOffset) { |
| if (const auto *AT = getContext().getAsArrayType(FT)) { |
| visitArray(PDIK, AT, FT.isVolatileQualified(), FD, CurStructOffset); |
| return; |
| } |
| |
| Super::visitWithKind(PDIK, FT, FD, CurStructOffset); |
| } |
| }; |
| |
| struct GenDestructorFuncName : GenUnaryFuncName<GenDestructorFuncName>, |
| DestructedTypeVisitor<GenDestructorFuncName> { |
| using Super = DestructedTypeVisitor<GenDestructorFuncName>; |
| GenDestructorFuncName(const char *Prefix, CharUnits DstAlignment, |
| ASTContext &Ctx) |
| : GenUnaryFuncName<GenDestructorFuncName>(Prefix, DstAlignment, Ctx) {} |
| void visitWithKind(QualType::DestructionKind DK, QualType FT, |
| const FieldDecl *FD, CharUnits CurStructOffset) { |
| if (const auto *AT = getContext().getAsArrayType(FT)) { |
| visitArray(DK, AT, FT.isVolatileQualified(), FD, CurStructOffset); |
| return; |
| } |
| |
| Super::visitWithKind(DK, FT, FD, CurStructOffset); |
| } |
| }; |
| |
| // Helper function that creates CGFunctionInfo for an N-ary special function. |
| template <size_t N> |
| static const CGFunctionInfo &getFunctionInfo(CodeGenModule &CGM, |
| FunctionArgList &Args) { |
| ASTContext &Ctx = CGM.getContext(); |
| llvm::SmallVector<ImplicitParamDecl *, N> Params; |
| QualType ParamTy = Ctx.getPointerType(Ctx.VoidPtrTy); |
| |
| for (unsigned I = 0; I < N; ++I) |
| Params.push_back(ImplicitParamDecl::Create( |
| Ctx, nullptr, SourceLocation(), &Ctx.Idents.get(ValNameStr[I]), ParamTy, |
| ImplicitParamDecl::Other)); |
| |
| for (auto &P : Params) |
| Args.push_back(P); |
| |
| return CGM.getTypes().arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Args); |
| } |
| |
| template <size_t N, size_t... Ints> |
| static std::array<Address, N> getParamAddrs(std::index_sequence<Ints...> IntSeq, |
| std::array<CharUnits, N> Alignments, |
| FunctionArgList Args, |
| CodeGenFunction *CGF) { |
| return std::array<Address, N>{{ |
| Address(CGF->Builder.CreateLoad(CGF->GetAddrOfLocalVar(Args[Ints])), |
| Alignments[Ints])...}}; |
| } |
| |
| // Template classes that are used as bases for classes that emit special |
| // functions. |
| template <class Derived> struct GenFuncBase { |
| template <size_t N> |
| void visitStruct(QualType FT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, N> Addrs) { |
| this->asDerived().callSpecialFunction( |
| FT, CurStructOffset + asDerived().getFieldOffset(FD), Addrs); |
| } |
| |
| template <class FieldKind, size_t N> |
| void visitArray(FieldKind FK, const ArrayType *AT, bool IsVolatile, |
| const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, N> Addrs) { |
| // Non-volatile trivial fields are copied when flushTrivialFields is called. |
| if (!FK) |
| return asDerived().visitTrivial(QualType(AT, 0), FD, CurStructOffset, |
| Addrs); |
| |
| asDerived().flushTrivialFields(Addrs); |
| CodeGenFunction &CGF = *this->CGF; |
| ASTContext &Ctx = CGF.getContext(); |
| |
| // Compute the end address. |
| QualType BaseEltQT; |
| std::array<Address, N> StartAddrs = Addrs; |
| for (unsigned I = 0; I < N; ++I) |
| StartAddrs[I] = getAddrWithOffset(Addrs[I], CurStructOffset, FD); |
| Address DstAddr = StartAddrs[DstIdx]; |
| llvm::Value *NumElts = CGF.emitArrayLength(AT, BaseEltQT, DstAddr); |
| unsigned BaseEltSize = Ctx.getTypeSizeInChars(BaseEltQT).getQuantity(); |
| llvm::Value *BaseEltSizeVal = |
| llvm::ConstantInt::get(NumElts->getType(), BaseEltSize); |
| llvm::Value *SizeInBytes = |
| CGF.Builder.CreateNUWMul(BaseEltSizeVal, NumElts); |
| Address BC = CGF.Builder.CreateBitCast(DstAddr, CGF.CGM.Int8PtrTy); |
| llvm::Value *DstArrayEnd = |
| CGF.Builder.CreateInBoundsGEP(BC.getPointer(), SizeInBytes); |
| DstArrayEnd = CGF.Builder.CreateBitCast(DstArrayEnd, CGF.CGM.Int8PtrPtrTy, |
| "dstarray.end"); |
| llvm::BasicBlock *PreheaderBB = CGF.Builder.GetInsertBlock(); |
| |
| // Create the header block and insert the phi instructions. |
| llvm::BasicBlock *HeaderBB = CGF.createBasicBlock("loop.header"); |
| CGF.EmitBlock(HeaderBB); |
| llvm::PHINode *PHIs[N]; |
| |
| for (unsigned I = 0; I < N; ++I) { |
| PHIs[I] = CGF.Builder.CreatePHI(CGF.CGM.Int8PtrPtrTy, 2, "addr.cur"); |
| PHIs[I]->addIncoming(StartAddrs[I].getPointer(), PreheaderBB); |
| } |
| |
| // Create the exit and loop body blocks. |
| llvm::BasicBlock *ExitBB = CGF.createBasicBlock("loop.exit"); |
| llvm::BasicBlock *LoopBB = CGF.createBasicBlock("loop.body"); |
| |
| // Emit the comparison and conditional branch instruction that jumps to |
| // either the exit or the loop body. |
| llvm::Value *Done = |
| CGF.Builder.CreateICmpEQ(PHIs[DstIdx], DstArrayEnd, "done"); |
| CGF.Builder.CreateCondBr(Done, ExitBB, LoopBB); |
| |
| // Visit the element of the array in the loop body. |
| CGF.EmitBlock(LoopBB); |
| QualType EltQT = AT->getElementType(); |
| CharUnits EltSize = Ctx.getTypeSizeInChars(EltQT); |
| std::array<Address, N> NewAddrs = Addrs; |
| |
| for (unsigned I = 0; I < N; ++I) |
| NewAddrs[I] = Address( |
| PHIs[I], StartAddrs[I].getAlignment().alignmentAtOffset(EltSize)); |
| |
| EltQT = IsVolatile ? EltQT.withVolatile() : EltQT; |
| this->asDerived().visitWithKind(FK, EltQT, nullptr, CharUnits::Zero(), |
| NewAddrs); |
| |
| LoopBB = CGF.Builder.GetInsertBlock(); |
| |
| for (unsigned I = 0; I < N; ++I) { |
| // Instrs to update the destination and source addresses. |
| // Update phi instructions. |
| NewAddrs[I] = getAddrWithOffset(NewAddrs[I], EltSize); |
| PHIs[I]->addIncoming(NewAddrs[I].getPointer(), LoopBB); |
| } |
| |
| // Insert an unconditional branch to the header block. |
| CGF.Builder.CreateBr(HeaderBB); |
| CGF.EmitBlock(ExitBB); |
| } |
| |
| /// Return an address with the specified offset from the passed address. |
| Address getAddrWithOffset(Address Addr, CharUnits Offset) { |
| assert(Addr.isValid() && "invalid address"); |
| if (Offset.getQuantity() == 0) |
| return Addr; |
| Addr = CGF->Builder.CreateBitCast(Addr, CGF->CGM.Int8PtrTy); |
| Addr = CGF->Builder.CreateConstInBoundsGEP(Addr, Offset.getQuantity()); |
| return CGF->Builder.CreateBitCast(Addr, CGF->CGM.Int8PtrPtrTy); |
| } |
| |
| Address getAddrWithOffset(Address Addr, CharUnits StructFieldOffset, |
| const FieldDecl *FD) { |
| return getAddrWithOffset(Addr, StructFieldOffset + |
| asDerived().getFieldOffset(FD)); |
| } |
| |
| template <size_t N> |
| llvm::Function *getFunction(StringRef FuncName, QualType QT, |
| std::array<CharUnits, N> Alignments, |
| CodeGenModule &CGM) { |
| // If the special function already exists in the module, return it. |
| if (llvm::Function *F = CGM.getModule().getFunction(FuncName)) { |
| bool WrongType = false; |
| if (!F->getReturnType()->isVoidTy()) |
| WrongType = true; |
| else { |
| for (const llvm::Argument &Arg : F->args()) |
| if (Arg.getType() != CGM.Int8PtrPtrTy) |
| WrongType = true; |
| } |
| |
| if (WrongType) { |
| std::string FuncName = std::string(F->getName()); |
| SourceLocation Loc = QT->castAs<RecordType>()->getDecl()->getLocation(); |
| CGM.Error(Loc, "special function " + FuncName + |
| " for non-trivial C struct has incorrect type"); |
| return nullptr; |
| } |
| return F; |
| } |
| |
| ASTContext &Ctx = CGM.getContext(); |
| FunctionArgList Args; |
| const CGFunctionInfo &FI = getFunctionInfo<N>(CGM, Args); |
| llvm::FunctionType *FuncTy = CGM.getTypes().GetFunctionType(FI); |
| llvm::Function *F = |
| llvm::Function::Create(FuncTy, llvm::GlobalValue::LinkOnceODRLinkage, |
| FuncName, &CGM.getModule()); |
| F->setVisibility(llvm::GlobalValue::HiddenVisibility); |
| CGM.SetLLVMFunctionAttributes(GlobalDecl(), FI, F); |
| CGM.SetLLVMFunctionAttributesForDefinition(nullptr, F); |
| IdentifierInfo *II = &Ctx.Idents.get(FuncName); |
| FunctionDecl *FD = FunctionDecl::Create( |
| Ctx, Ctx.getTranslationUnitDecl(), SourceLocation(), SourceLocation(), |
| II, Ctx.getFunctionType(Ctx.VoidTy, llvm::None, {}), nullptr, |
| SC_PrivateExtern, false, false); |
| CodeGenFunction NewCGF(CGM); |
| setCGF(&NewCGF); |
| CGF->StartFunction(FD, Ctx.VoidTy, F, FI, Args); |
| std::array<Address, N> Addrs = |
| getParamAddrs<N>(std::make_index_sequence<N>{}, Alignments, Args, CGF); |
| asDerived().visitStructFields(QT, CharUnits::Zero(), Addrs); |
| CGF->FinishFunction(); |
| return F; |
| } |
| |
| template <size_t N> |
| void callFunc(StringRef FuncName, QualType QT, std::array<Address, N> Addrs, |
| CodeGenFunction &CallerCGF) { |
| std::array<CharUnits, N> Alignments; |
| llvm::Value *Ptrs[N]; |
| |
| for (unsigned I = 0; I < N; ++I) { |
| Alignments[I] = Addrs[I].getAlignment(); |
| Ptrs[I] = |
| CallerCGF.Builder.CreateBitCast(Addrs[I], CallerCGF.CGM.Int8PtrPtrTy) |
| .getPointer(); |
| } |
| |
| if (llvm::Function *F = |
| getFunction(FuncName, QT, Alignments, CallerCGF.CGM)) |
| CallerCGF.EmitNounwindRuntimeCall(F, Ptrs); |
| } |
| |
| Derived &asDerived() { return static_cast<Derived &>(*this); } |
| |
| void setCGF(CodeGenFunction *F) { CGF = F; } |
| |
| CodeGenFunction *CGF = nullptr; |
| }; |
| |
| template <class Derived, bool IsMove> |
| struct GenBinaryFunc : CopyStructVisitor<Derived, IsMove>, |
| GenFuncBase<Derived> { |
| GenBinaryFunc(ASTContext &Ctx) : CopyStructVisitor<Derived, IsMove>(Ctx) {} |
| |
| void flushTrivialFields(std::array<Address, 2> Addrs) { |
| CharUnits Size = this->End - this->Start; |
| |
| if (Size.getQuantity() == 0) |
| return; |
| |
| Address DstAddr = this->getAddrWithOffset(Addrs[DstIdx], this->Start); |
| Address SrcAddr = this->getAddrWithOffset(Addrs[SrcIdx], this->Start); |
| |
| // Emit memcpy. |
| if (Size.getQuantity() >= 16 || !llvm::isPowerOf2_32(Size.getQuantity())) { |
| llvm::Value *SizeVal = |
| llvm::ConstantInt::get(this->CGF->SizeTy, Size.getQuantity()); |
| DstAddr = |
| this->CGF->Builder.CreateElementBitCast(DstAddr, this->CGF->Int8Ty); |
| SrcAddr = |
| this->CGF->Builder.CreateElementBitCast(SrcAddr, this->CGF->Int8Ty); |
| this->CGF->Builder.CreateMemCpy(DstAddr, SrcAddr, SizeVal, false); |
| } else { |
| llvm::Type *Ty = llvm::Type::getIntNTy( |
| this->CGF->getLLVMContext(), |
| Size.getQuantity() * this->CGF->getContext().getCharWidth()); |
| DstAddr = this->CGF->Builder.CreateElementBitCast(DstAddr, Ty); |
| SrcAddr = this->CGF->Builder.CreateElementBitCast(SrcAddr, Ty); |
| llvm::Value *SrcVal = this->CGF->Builder.CreateLoad(SrcAddr, false); |
| this->CGF->Builder.CreateStore(SrcVal, DstAddr, false); |
| } |
| |
| this->Start = this->End = CharUnits::Zero(); |
| } |
| |
| template <class... Ts> |
| void visitVolatileTrivial(QualType FT, const FieldDecl *FD, CharUnits Offset, |
| std::array<Address, 2> Addrs) { |
| LValue DstLV, SrcLV; |
| if (FD) { |
| // No need to copy zero-length bit-fields. |
| if (FD->isZeroLengthBitField(this->CGF->getContext())) |
| return; |
| |
| QualType RT = QualType(FD->getParent()->getTypeForDecl(), 0); |
| llvm::PointerType *PtrTy = this->CGF->ConvertType(RT)->getPointerTo(); |
| Address DstAddr = this->getAddrWithOffset(Addrs[DstIdx], Offset); |
| LValue DstBase = this->CGF->MakeAddrLValue( |
| this->CGF->Builder.CreateBitCast(DstAddr, PtrTy), FT); |
| DstLV = this->CGF->EmitLValueForField(DstBase, FD); |
| Address SrcAddr = this->getAddrWithOffset(Addrs[SrcIdx], Offset); |
| LValue SrcBase = this->CGF->MakeAddrLValue( |
| this->CGF->Builder.CreateBitCast(SrcAddr, PtrTy), FT); |
| SrcLV = this->CGF->EmitLValueForField(SrcBase, FD); |
| } else { |
| llvm::PointerType *Ty = this->CGF->ConvertType(FT)->getPointerTo(); |
| Address DstAddr = this->CGF->Builder.CreateBitCast(Addrs[DstIdx], Ty); |
| Address SrcAddr = this->CGF->Builder.CreateBitCast(Addrs[SrcIdx], Ty); |
| DstLV = this->CGF->MakeAddrLValue(DstAddr, FT); |
| SrcLV = this->CGF->MakeAddrLValue(SrcAddr, FT); |
| } |
| RValue SrcVal = this->CGF->EmitLoadOfLValue(SrcLV, SourceLocation()); |
| this->CGF->EmitStoreThroughLValue(SrcVal, DstLV); |
| } |
| }; |
| |
| // These classes that emit the special functions for a non-trivial struct. |
| struct GenDestructor : StructVisitor<GenDestructor>, |
| GenFuncBase<GenDestructor>, |
| DestructedTypeVisitor<GenDestructor> { |
| using Super = DestructedTypeVisitor<GenDestructor>; |
| GenDestructor(ASTContext &Ctx) : StructVisitor<GenDestructor>(Ctx) {} |
| |
| void visitWithKind(QualType::DestructionKind DK, QualType FT, |
| const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 1> Addrs) { |
| if (const auto *AT = getContext().getAsArrayType(FT)) { |
| visitArray(DK, AT, FT.isVolatileQualified(), FD, CurStructOffset, Addrs); |
| return; |
| } |
| |
| Super::visitWithKind(DK, FT, FD, CurStructOffset, Addrs); |
| } |
| |
| void visitARCStrong(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset, std::array<Address, 1> Addrs) { |
| CGF->destroyARCStrongImprecise( |
| *CGF, getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD), QT); |
| } |
| |
| void visitARCWeak(QualType QT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 1> Addrs) { |
| CGF->destroyARCWeak( |
| *CGF, getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD), QT); |
| } |
| |
| void callSpecialFunction(QualType FT, CharUnits Offset, |
| std::array<Address, 1> Addrs) { |
| CGF->callCStructDestructor( |
| CGF->MakeAddrLValue(getAddrWithOffset(Addrs[DstIdx], Offset), FT)); |
| } |
| }; |
| |
| struct GenDefaultInitialize |
| : StructVisitor<GenDefaultInitialize>, |
| GenFuncBase<GenDefaultInitialize>, |
| DefaultInitializedTypeVisitor<GenDefaultInitialize> { |
| using Super = DefaultInitializedTypeVisitor<GenDefaultInitialize>; |
| typedef GenFuncBase<GenDefaultInitialize> GenFuncBaseTy; |
| |
| GenDefaultInitialize(ASTContext &Ctx) |
| : StructVisitor<GenDefaultInitialize>(Ctx) {} |
| |
| void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType FT, |
| const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 1> Addrs) { |
| if (const auto *AT = getContext().getAsArrayType(FT)) { |
| visitArray(PDIK, AT, FT.isVolatileQualified(), FD, CurStructOffset, |
| Addrs); |
| return; |
| } |
| |
| Super::visitWithKind(PDIK, FT, FD, CurStructOffset, Addrs); |
| } |
| |
| void visitARCStrong(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset, std::array<Address, 1> Addrs) { |
| CGF->EmitNullInitialization( |
| getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD), QT); |
| } |
| |
| void visitARCWeak(QualType QT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 1> Addrs) { |
| CGF->EmitNullInitialization( |
| getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD), QT); |
| } |
| |
| template <class FieldKind, size_t... Is> |
| void visitArray(FieldKind FK, const ArrayType *AT, bool IsVolatile, |
| const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 1> Addrs) { |
| if (!FK) |
| return visitTrivial(QualType(AT, 0), FD, CurStructOffset, Addrs); |
| |
| ASTContext &Ctx = getContext(); |
| CharUnits Size = Ctx.getTypeSizeInChars(QualType(AT, 0)); |
| QualType EltTy = Ctx.getBaseElementType(QualType(AT, 0)); |
| |
| if (Size < CharUnits::fromQuantity(16) || EltTy->getAs<RecordType>()) { |
| GenFuncBaseTy::visitArray(FK, AT, IsVolatile, FD, CurStructOffset, Addrs); |
| return; |
| } |
| |
| llvm::Constant *SizeVal = CGF->Builder.getInt64(Size.getQuantity()); |
| Address DstAddr = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Address Loc = CGF->Builder.CreateElementBitCast(DstAddr, CGF->Int8Ty); |
| CGF->Builder.CreateMemSet(Loc, CGF->Builder.getInt8(0), SizeVal, |
| IsVolatile); |
| } |
| |
| void callSpecialFunction(QualType FT, CharUnits Offset, |
| std::array<Address, 1> Addrs) { |
| CGF->callCStructDefaultConstructor( |
| CGF->MakeAddrLValue(getAddrWithOffset(Addrs[DstIdx], Offset), FT)); |
| } |
| }; |
| |
| struct GenCopyConstructor : GenBinaryFunc<GenCopyConstructor, false> { |
| GenCopyConstructor(ASTContext &Ctx) |
| : GenBinaryFunc<GenCopyConstructor, false>(Ctx) {} |
| |
| void visitARCStrong(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset, std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| llvm::Value *SrcVal = CGF->EmitLoadOfScalar( |
| Addrs[SrcIdx], QT.isVolatileQualified(), QT, SourceLocation()); |
| llvm::Value *Val = CGF->EmitARCRetain(QT, SrcVal); |
| CGF->EmitStoreOfScalar(Val, CGF->MakeAddrLValue(Addrs[DstIdx], QT), true); |
| } |
| |
| void visitARCWeak(QualType QT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| CGF->EmitARCCopyWeak(Addrs[DstIdx], Addrs[SrcIdx]); |
| } |
| |
| void callSpecialFunction(QualType FT, CharUnits Offset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], Offset); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], Offset); |
| CGF->callCStructCopyConstructor(CGF->MakeAddrLValue(Addrs[DstIdx], FT), |
| CGF->MakeAddrLValue(Addrs[SrcIdx], FT)); |
| } |
| }; |
| |
| struct GenMoveConstructor : GenBinaryFunc<GenMoveConstructor, true> { |
| GenMoveConstructor(ASTContext &Ctx) |
| : GenBinaryFunc<GenMoveConstructor, true>(Ctx) {} |
| |
| void visitARCStrong(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset, std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| LValue SrcLV = CGF->MakeAddrLValue(Addrs[SrcIdx], QT); |
| llvm::Value *SrcVal = |
| CGF->EmitLoadOfLValue(SrcLV, SourceLocation()).getScalarVal(); |
| CGF->EmitStoreOfScalar(getNullForVariable(SrcLV.getAddress(*CGF)), SrcLV); |
| CGF->EmitStoreOfScalar(SrcVal, CGF->MakeAddrLValue(Addrs[DstIdx], QT), |
| /* isInitialization */ true); |
| } |
| |
| void visitARCWeak(QualType QT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| CGF->EmitARCMoveWeak(Addrs[DstIdx], Addrs[SrcIdx]); |
| } |
| |
| void callSpecialFunction(QualType FT, CharUnits Offset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], Offset); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], Offset); |
| CGF->callCStructMoveConstructor(CGF->MakeAddrLValue(Addrs[DstIdx], FT), |
| CGF->MakeAddrLValue(Addrs[SrcIdx], FT)); |
| } |
| }; |
| |
| struct GenCopyAssignment : GenBinaryFunc<GenCopyAssignment, false> { |
| GenCopyAssignment(ASTContext &Ctx) |
| : GenBinaryFunc<GenCopyAssignment, false>(Ctx) {} |
| |
| void visitARCStrong(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset, std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| llvm::Value *SrcVal = CGF->EmitLoadOfScalar( |
| Addrs[SrcIdx], QT.isVolatileQualified(), QT, SourceLocation()); |
| CGF->EmitARCStoreStrong(CGF->MakeAddrLValue(Addrs[DstIdx], QT), SrcVal, |
| false); |
| } |
| |
| void visitARCWeak(QualType QT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| CGF->emitARCCopyAssignWeak(QT, Addrs[DstIdx], Addrs[SrcIdx]); |
| } |
| |
| void callSpecialFunction(QualType FT, CharUnits Offset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], Offset); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], Offset); |
| CGF->callCStructCopyAssignmentOperator( |
| CGF->MakeAddrLValue(Addrs[DstIdx], FT), |
| CGF->MakeAddrLValue(Addrs[SrcIdx], FT)); |
| } |
| }; |
| |
| struct GenMoveAssignment : GenBinaryFunc<GenMoveAssignment, true> { |
| GenMoveAssignment(ASTContext &Ctx) |
| : GenBinaryFunc<GenMoveAssignment, true>(Ctx) {} |
| |
| void visitARCStrong(QualType QT, const FieldDecl *FD, |
| CharUnits CurStructOffset, std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| LValue SrcLV = CGF->MakeAddrLValue(Addrs[SrcIdx], QT); |
| llvm::Value *SrcVal = |
| CGF->EmitLoadOfLValue(SrcLV, SourceLocation()).getScalarVal(); |
| CGF->EmitStoreOfScalar(getNullForVariable(SrcLV.getAddress(*CGF)), SrcLV); |
| LValue DstLV = CGF->MakeAddrLValue(Addrs[DstIdx], QT); |
| llvm::Value *DstVal = |
| CGF->EmitLoadOfLValue(DstLV, SourceLocation()).getScalarVal(); |
| CGF->EmitStoreOfScalar(SrcVal, DstLV); |
| CGF->EmitARCRelease(DstVal, ARCImpreciseLifetime); |
| } |
| |
| void visitARCWeak(QualType QT, const FieldDecl *FD, CharUnits CurStructOffset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], CurStructOffset, FD); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], CurStructOffset, FD); |
| CGF->emitARCMoveAssignWeak(QT, Addrs[DstIdx], Addrs[SrcIdx]); |
| } |
| |
| void callSpecialFunction(QualType FT, CharUnits Offset, |
| std::array<Address, 2> Addrs) { |
| Addrs[DstIdx] = getAddrWithOffset(Addrs[DstIdx], Offset); |
| Addrs[SrcIdx] = getAddrWithOffset(Addrs[SrcIdx], Offset); |
| CGF->callCStructMoveAssignmentOperator( |
| CGF->MakeAddrLValue(Addrs[DstIdx], FT), |
| CGF->MakeAddrLValue(Addrs[SrcIdx], FT)); |
| } |
| }; |
| |
| } // namespace |
| |
| void CodeGenFunction::destroyNonTrivialCStruct(CodeGenFunction &CGF, |
| Address Addr, QualType Type) { |
| CGF.callCStructDestructor(CGF.MakeAddrLValue(Addr, Type)); |
| } |
| |
| // Default-initialize a variable that is a non-trivial struct or an array of |
| // such structure. |
| void CodeGenFunction::defaultInitNonTrivialCStructVar(LValue Dst) { |
| GenDefaultInitialize Gen(getContext()); |
| Address DstPtr = |
| Builder.CreateBitCast(Dst.getAddress(*this), CGM.Int8PtrPtrTy); |
| Gen.setCGF(this); |
| QualType QT = Dst.getType(); |
| QT = Dst.isVolatile() ? QT.withVolatile() : QT; |
| Gen.visit(QT, nullptr, CharUnits::Zero(), std::array<Address, 1>({{DstPtr}})); |
| } |
| |
| template <class G, size_t N> |
| static void callSpecialFunction(G &&Gen, StringRef FuncName, QualType QT, |
| bool IsVolatile, CodeGenFunction &CGF, |
| std::array<Address, N> Addrs) { |
| auto SetArtificialLoc = ApplyDebugLocation::CreateArtificial(CGF); |
| for (unsigned I = 0; I < N; ++I) |
| Addrs[I] = CGF.Builder.CreateBitCast(Addrs[I], CGF.CGM.Int8PtrPtrTy); |
| QT = IsVolatile ? QT.withVolatile() : QT; |
| Gen.callFunc(FuncName, QT, Addrs, CGF); |
| } |
| |
| template <class G, size_t N> |
| static llvm::Function * |
| getSpecialFunction(G &&Gen, StringRef FuncName, QualType QT, bool IsVolatile, |
| std::array<CharUnits, N> Alignments, CodeGenModule &CGM) { |
| QT = IsVolatile ? QT.withVolatile() : QT; |
| // The following call requires an array of addresses as arguments, but doesn't |
| // actually use them (it overwrites them with the addresses of the arguments |
| // of the created function). |
| return Gen.getFunction(FuncName, QT, Alignments, CGM); |
| } |
| |
| // Functions to emit calls to the special functions of a non-trivial C struct. |
| void CodeGenFunction::callCStructDefaultConstructor(LValue Dst) { |
| bool IsVolatile = Dst.isVolatile(); |
| Address DstPtr = Dst.getAddress(*this); |
| QualType QT = Dst.getType(); |
| GenDefaultInitializeFuncName GenName(DstPtr.getAlignment(), getContext()); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| callSpecialFunction(GenDefaultInitialize(getContext()), FuncName, QT, |
| IsVolatile, *this, std::array<Address, 1>({{DstPtr}})); |
| } |
| |
| std::string CodeGenFunction::getNonTrivialCopyConstructorStr( |
| QualType QT, CharUnits Alignment, bool IsVolatile, ASTContext &Ctx) { |
| GenBinaryFuncName<false> GenName("", Alignment, Alignment, Ctx); |
| return GenName.getName(QT, IsVolatile); |
| } |
| |
| std::string CodeGenFunction::getNonTrivialDestructorStr(QualType QT, |
| CharUnits Alignment, |
| bool IsVolatile, |
| ASTContext &Ctx) { |
| GenDestructorFuncName GenName("", Alignment, Ctx); |
| return GenName.getName(QT, IsVolatile); |
| } |
| |
| void CodeGenFunction::callCStructDestructor(LValue Dst) { |
| bool IsVolatile = Dst.isVolatile(); |
| Address DstPtr = Dst.getAddress(*this); |
| QualType QT = Dst.getType(); |
| GenDestructorFuncName GenName("__destructor_", DstPtr.getAlignment(), |
| getContext()); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| callSpecialFunction(GenDestructor(getContext()), FuncName, QT, IsVolatile, |
| *this, std::array<Address, 1>({{DstPtr}})); |
| } |
| |
| void CodeGenFunction::callCStructCopyConstructor(LValue Dst, LValue Src) { |
| bool IsVolatile = Dst.isVolatile() || Src.isVolatile(); |
| Address DstPtr = Dst.getAddress(*this), SrcPtr = Src.getAddress(*this); |
| QualType QT = Dst.getType(); |
| GenBinaryFuncName<false> GenName("__copy_constructor_", DstPtr.getAlignment(), |
| SrcPtr.getAlignment(), getContext()); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| callSpecialFunction(GenCopyConstructor(getContext()), FuncName, QT, |
| IsVolatile, *this, |
| std::array<Address, 2>({{DstPtr, SrcPtr}})); |
| } |
| |
| void CodeGenFunction::callCStructCopyAssignmentOperator(LValue Dst, LValue Src |
| |
| ) { |
| bool IsVolatile = Dst.isVolatile() || Src.isVolatile(); |
| Address DstPtr = Dst.getAddress(*this), SrcPtr = Src.getAddress(*this); |
| QualType QT = Dst.getType(); |
| GenBinaryFuncName<false> GenName("__copy_assignment_", DstPtr.getAlignment(), |
| SrcPtr.getAlignment(), getContext()); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| callSpecialFunction(GenCopyAssignment(getContext()), FuncName, QT, IsVolatile, |
| *this, std::array<Address, 2>({{DstPtr, SrcPtr}})); |
| } |
| |
| void CodeGenFunction::callCStructMoveConstructor(LValue Dst, LValue Src) { |
| bool IsVolatile = Dst.isVolatile() || Src.isVolatile(); |
| Address DstPtr = Dst.getAddress(*this), SrcPtr = Src.getAddress(*this); |
| QualType QT = Dst.getType(); |
| GenBinaryFuncName<true> GenName("__move_constructor_", DstPtr.getAlignment(), |
| SrcPtr.getAlignment(), getContext()); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| callSpecialFunction(GenMoveConstructor(getContext()), FuncName, QT, |
| IsVolatile, *this, |
| std::array<Address, 2>({{DstPtr, SrcPtr}})); |
| } |
| |
| void CodeGenFunction::callCStructMoveAssignmentOperator(LValue Dst, LValue Src |
| |
| ) { |
| bool IsVolatile = Dst.isVolatile() || Src.isVolatile(); |
| Address DstPtr = Dst.getAddress(*this), SrcPtr = Src.getAddress(*this); |
| QualType QT = Dst.getType(); |
| GenBinaryFuncName<true> GenName("__move_assignment_", DstPtr.getAlignment(), |
| SrcPtr.getAlignment(), getContext()); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| callSpecialFunction(GenMoveAssignment(getContext()), FuncName, QT, IsVolatile, |
| *this, std::array<Address, 2>({{DstPtr, SrcPtr}})); |
| } |
| |
| llvm::Function *clang::CodeGen::getNonTrivialCStructDefaultConstructor( |
| CodeGenModule &CGM, CharUnits DstAlignment, bool IsVolatile, QualType QT) { |
| ASTContext &Ctx = CGM.getContext(); |
| GenDefaultInitializeFuncName GenName(DstAlignment, Ctx); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| return getSpecialFunction(GenDefaultInitialize(Ctx), FuncName, QT, IsVolatile, |
| std::array<CharUnits, 1>({{DstAlignment}}), CGM); |
| } |
| |
| llvm::Function *clang::CodeGen::getNonTrivialCStructCopyConstructor( |
| CodeGenModule &CGM, CharUnits DstAlignment, CharUnits SrcAlignment, |
| bool IsVolatile, QualType QT) { |
| ASTContext &Ctx = CGM.getContext(); |
| GenBinaryFuncName<false> GenName("__copy_constructor_", DstAlignment, |
| SrcAlignment, Ctx); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| return getSpecialFunction( |
| GenCopyConstructor(Ctx), FuncName, QT, IsVolatile, |
| std::array<CharUnits, 2>({{DstAlignment, SrcAlignment}}), CGM); |
| } |
| |
| llvm::Function *clang::CodeGen::getNonTrivialCStructMoveConstructor( |
| CodeGenModule &CGM, CharUnits DstAlignment, CharUnits SrcAlignment, |
| bool IsVolatile, QualType QT) { |
| ASTContext &Ctx = CGM.getContext(); |
| GenBinaryFuncName<true> GenName("__move_constructor_", DstAlignment, |
| SrcAlignment, Ctx); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| return getSpecialFunction( |
| GenMoveConstructor(Ctx), FuncName, QT, IsVolatile, |
| std::array<CharUnits, 2>({{DstAlignment, SrcAlignment}}), CGM); |
| } |
| |
| llvm::Function *clang::CodeGen::getNonTrivialCStructCopyAssignmentOperator( |
| CodeGenModule &CGM, CharUnits DstAlignment, CharUnits SrcAlignment, |
| bool IsVolatile, QualType QT) { |
| ASTContext &Ctx = CGM.getContext(); |
| GenBinaryFuncName<false> GenName("__copy_assignment_", DstAlignment, |
| SrcAlignment, Ctx); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| return getSpecialFunction( |
| GenCopyAssignment(Ctx), FuncName, QT, IsVolatile, |
| std::array<CharUnits, 2>({{DstAlignment, SrcAlignment}}), CGM); |
| } |
| |
| llvm::Function *clang::CodeGen::getNonTrivialCStructMoveAssignmentOperator( |
| CodeGenModule &CGM, CharUnits DstAlignment, CharUnits SrcAlignment, |
| bool IsVolatile, QualType QT) { |
| ASTContext &Ctx = CGM.getContext(); |
| GenBinaryFuncName<true> GenName("__move_assignment_", DstAlignment, |
| SrcAlignment, Ctx); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| return getSpecialFunction( |
| GenMoveAssignment(Ctx), FuncName, QT, IsVolatile, |
| std::array<CharUnits, 2>({{DstAlignment, SrcAlignment}}), CGM); |
| } |
| |
| llvm::Function *clang::CodeGen::getNonTrivialCStructDestructor( |
| CodeGenModule &CGM, CharUnits DstAlignment, bool IsVolatile, QualType QT) { |
| ASTContext &Ctx = CGM.getContext(); |
| GenDestructorFuncName GenName("__destructor_", DstAlignment, Ctx); |
| std::string FuncName = GenName.getName(QT, IsVolatile); |
| return getSpecialFunction(GenDestructor(Ctx), FuncName, QT, IsVolatile, |
| std::array<CharUnits, 1>({{DstAlignment}}), CGM); |
| } |