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usr / src / contrib / llvm-project / clang / lib / CodeGen /

📁 ..
📄 ABIInfo.h(5.01 KB)
📄 Address.h(3.28 KB)
📄 BackendUtil.cpp(67.92 KB)
📄 CGAtomic.cpp(85.95 KB)
📄 CGBlocks.cpp(111.14 KB)
📄 CGBlocks.h(8.94 KB)
📄 CGBuilder.h(13.78 KB)
📄 CGBuiltin.cpp(695.8 KB)
📄 CGCUDANV.cpp(35.16 KB)
📄 CGCUDARuntime.cpp(1.53 KB)
📄 CGCUDARuntime.h(3.4 KB)
📄 CGCXX.cpp(11.8 KB)
📄 CGCXXABI.cpp(12.47 KB)
📄 CGCXXABI.h(27.9 KB)
📄 CGCall.cpp(197.3 KB)
📄 CGCall.h(11.62 KB)
📄 CGClass.cpp(113.54 KB)
📄 CGCleanup.cpp(46.97 KB)
📄 CGCleanup.h(19.28 KB)
📄 CGCoroutine.cpp(27.82 KB)
📄 CGDebugInfo.cpp(191.42 KB)
📄 CGDebugInfo.h(34.73 KB)
📄 CGDecl.cpp(97.98 KB)
📄 CGDeclCXX.cpp(34.73 KB)
📄 CGException.cpp(80.38 KB)
📄 CGExpr.cpp(209.78 KB)
📄 CGExprAgg.cpp(77.04 KB)
📄 CGExprCXX.cpp(90.39 KB)
📄 CGExprComplex.cpp(44.9 KB)
📄 CGExprConstant.cpp(86.17 KB)
📄 CGExprScalar.cpp(196.29 KB)
📄 CGGPUBuiltin.cpp(6.17 KB)
📄 CGLoopInfo.cpp(29.17 KB)
📄 CGLoopInfo.h(10.5 KB)
📄 CGNonTrivialStruct.cpp(41.4 KB)
📄 CGObjC.cpp(142.79 KB)
📄 CGObjCGNU.cpp(168.38 KB)
📄 CGObjCMac.cpp(304.84 KB)
📄 CGObjCRuntime.cpp(14.68 KB)
📄 CGObjCRuntime.h(14.81 KB)
📄 CGOpenCLRuntime.cpp(7.08 KB)
📄 CGOpenCLRuntime.h(3.44 KB)
📄 CGOpenMPRuntime.cpp(501.86 KB)
📄 CGOpenMPRuntime.h(111.87 KB)
📄 CGOpenMPRuntimeNVPTX.cpp(215.42 KB)
📄 CGOpenMPRuntimeNVPTX.h(22.59 KB)
📄 CGRecordLayout.h(7.84 KB)
📄 CGRecordLayoutBuilder.cpp(38.24 KB)
📄 CGStmt.cpp(92.92 KB)
📄 CGStmtOpenMP.cpp(278.04 KB)
📄 CGVTT.cpp(6.81 KB)
📄 CGVTables.cpp(55.02 KB)
📄 CGVTables.h(6.38 KB)
📄 CGValue.h(21.24 KB)
📄 CodeGenABITypes.cpp(5 KB)
📄 CodeGenAction.cpp(46.2 KB)
📄 CodeGenFunction.cpp(95.34 KB)
📄 CodeGenFunction.h(200.94 KB)
📄 CodeGenModule.cpp(228.13 KB)
📄 CodeGenModule.h(60.91 KB)
📄 CodeGenPGO.cpp(36.17 KB)
📄 CodeGenPGO.h(4.36 KB)
📄 CodeGenTBAA.cpp(16.92 KB)
📄 CodeGenTBAA.h(9.19 KB)
📄 CodeGenTypeCache.h(3.28 KB)
📄 CodeGenTypes.cpp(32.35 KB)
📄 CodeGenTypes.h(13.42 KB)
📄 ConstantEmitter.h(6.65 KB)
📄 ConstantInitBuilder.cpp(10.29 KB)
📄 CoverageMappingGen.cpp(54.64 KB)
📄 CoverageMappingGen.h(4.04 KB)
📄 EHScopeStack.h(14.38 KB)
📄 ItaniumCXXABI.cpp(176.66 KB)
📄 MacroPPCallbacks.cpp(6.41 KB)
📄 MacroPPCallbacks.h(4.54 KB)
📄 MicrosoftCXXABI.cpp(175.41 KB)
📄 ModuleBuilder.cpp(11.79 KB)
📄 ObjectFilePCHContainerOperations.cpp(12.93 KB)
📄 PatternInit.cpp(4.1 KB)
📄 PatternInit.h(722 B)
📄 SanitizerMetadata.cpp(4.21 KB)
📄 SanitizerMetadata.h(1.63 KB)
📄 SwiftCallingConv.cpp(29.76 KB)
📄 TargetInfo.cpp(403.11 KB)
📄 TargetInfo.h(15.43 KB)
📄 VarBypassDetector.cpp(5.1 KB)
📄 VarBypassDetector.h(2.29 KB)

Editing: CGVTT.cpp

//===--- CGVTT.cpp - Emit LLVM Code for C++ VTTs --------------------------===//
//
// 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 contains code dealing with C++ code generation of VTTs (vtable tables).
//
//===----------------------------------------------------------------------===//

#include "CodeGenModule.h"
#include "CGCXXABI.h"
#include "clang/AST/RecordLayout.h"
#include "clang/AST/VTTBuilder.h"
using namespace clang;
using namespace CodeGen;

static llvm::GlobalVariable *
GetAddrOfVTTVTable(CodeGenVTables &CGVT, CodeGenModule &CGM,
                   const CXXRecordDecl *MostDerivedClass,
                   const VTTVTable &VTable,
                   llvm::GlobalVariable::LinkageTypes Linkage,
                   VTableLayout::AddressPointsMapTy &AddressPoints) {
  if (VTable.getBase() == MostDerivedClass) {
    assert(VTable.getBaseOffset().isZero() &&
           "Most derived class vtable must have a zero offset!");
    // This is a regular vtable.
    return CGM.getCXXABI().getAddrOfVTable(MostDerivedClass, CharUnits());
  }

return CGVT.GenerateConstructionVTable(MostDerivedClass,
                                         VTable.getBaseSubobject(),
                                         VTable.isVirtual(),
                                         Linkage,
                                         AddressPoints);
}

void
CodeGenVTables::EmitVTTDefinition(llvm::GlobalVariable *VTT,
                                  llvm::GlobalVariable::LinkageTypes Linkage,
                                  const CXXRecordDecl *RD) {
  VTTBuilder Builder(CGM.getContext(), RD, /*GenerateDefinition=*/true);

llvm::Type *Int8PtrTy = CGM.Int8PtrTy, *Int32Ty = CGM.Int32Ty;
  llvm::ArrayType *ArrayType =
    llvm::ArrayType::get(Int8PtrTy, Builder.getVTTComponents().size());

SmallVector<llvm::GlobalVariable *, 8> VTables;
  SmallVector<VTableAddressPointsMapTy, 8> VTableAddressPoints;
  for (const VTTVTable *i = Builder.getVTTVTables().begin(),
                       *e = Builder.getVTTVTables().end(); i != e; ++i) {
    VTableAddressPoints.push_back(VTableAddressPointsMapTy());
    VTables.push_back(GetAddrOfVTTVTable(*this, CGM, RD, *i, Linkage,
                                         VTableAddressPoints.back()));
  }

SmallVector<llvm::Constant *, 8> VTTComponents;
  for (const VTTComponent *i = Builder.getVTTComponents().begin(),
                          *e = Builder.getVTTComponents().end(); i != e; ++i) {
    const VTTVTable &VTTVT = Builder.getVTTVTables()[i->VTableIndex];
    llvm::GlobalVariable *VTable = VTables[i->VTableIndex];
    VTableLayout::AddressPointLocation AddressPoint;
    if (VTTVT.getBase() == RD) {
      // Just get the address point for the regular vtable.
      AddressPoint =
          getItaniumVTableContext().getVTableLayout(RD).getAddressPoint(
              i->VTableBase);
    } else {
      AddressPoint = VTableAddressPoints[i->VTableIndex].lookup(i->VTableBase);
      assert(AddressPoint.AddressPointIndex != 0 &&
             "Did not find ctor vtable address point!");
    }

llvm::Value *Idxs[] = {
       llvm::ConstantInt::get(Int32Ty, 0),
       llvm::ConstantInt::get(Int32Ty, AddressPoint.VTableIndex),
       llvm::ConstantInt::get(Int32Ty, AddressPoint.AddressPointIndex),
     };

llvm::Constant *Init = llvm::ConstantExpr::getGetElementPtr(
         VTable->getValueType(), VTable, Idxs, /*InBounds=*/true,
         /*InRangeIndex=*/1);

Init = llvm::ConstantExpr::getBitCast(Init, Int8PtrTy);

VTTComponents.push_back(Init);
  }

llvm::Constant *Init = llvm::ConstantArray::get(ArrayType, VTTComponents);

VTT->setInitializer(Init);

// Set the correct linkage.
  VTT->setLinkage(Linkage);

if (CGM.supportsCOMDAT() && VTT->isWeakForLinker())
    VTT->setComdat(CGM.getModule().getOrInsertComdat(VTT->getName()));

// Set the right visibility.
  CGM.setGVProperties(VTT, RD);
}

llvm::GlobalVariable *CodeGenVTables::GetAddrOfVTT(const CXXRecordDecl *RD) {
  assert(RD->getNumVBases() && "Only classes with virtual bases need a VTT");

SmallString<256> OutName;
  llvm::raw_svector_ostream Out(OutName);
  cast<ItaniumMangleContext>(CGM.getCXXABI().getMangleContext())
      .mangleCXXVTT(RD, Out);
  StringRef Name = OutName.str();

// This will also defer the definition of the VTT.
  (void) CGM.getCXXABI().getAddrOfVTable(RD, CharUnits());

VTTBuilder Builder(CGM.getContext(), RD, /*GenerateDefinition=*/false);

llvm::ArrayType *ArrayType =
    llvm::ArrayType::get(CGM.Int8PtrTy, Builder.getVTTComponents().size());
  unsigned Align = CGM.getDataLayout().getABITypeAlignment(CGM.Int8PtrTy);

llvm::GlobalVariable *GV = CGM.CreateOrReplaceCXXRuntimeVariable(
      Name, ArrayType, llvm::GlobalValue::ExternalLinkage, Align);
  GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
  return GV;
}

uint64_t CodeGenVTables::getSubVTTIndex(const CXXRecordDecl *RD,
                                        BaseSubobject Base) {
  BaseSubobjectPairTy ClassSubobjectPair(RD, Base);

SubVTTIndiciesMapTy::iterator I = SubVTTIndicies.find(ClassSubobjectPair);
  if (I != SubVTTIndicies.end())
    return I->second;

VTTBuilder Builder(CGM.getContext(), RD, /*GenerateDefinition=*/false);

for (llvm::DenseMap<BaseSubobject, uint64_t>::const_iterator I =
       Builder.getSubVTTIndicies().begin(),
       E = Builder.getSubVTTIndicies().end(); I != E; ++I) {
    // Insert all indices.
    BaseSubobjectPairTy ClassSubobjectPair(RD, I->first);

SubVTTIndicies.insert(std::make_pair(ClassSubobjectPair, I->second));
  }

I = SubVTTIndicies.find(ClassSubobjectPair);
  assert(I != SubVTTIndicies.end() && "Did not find index!");

return I->second;
}

uint64_t
CodeGenVTables::getSecondaryVirtualPointerIndex(const CXXRecordDecl *RD,
                                                BaseSubobject Base) {
  SecondaryVirtualPointerIndicesMapTy::iterator I =
    SecondaryVirtualPointerIndices.find(std::make_pair(RD, Base));

if (I != SecondaryVirtualPointerIndices.end())
    return I->second;

VTTBuilder Builder(CGM.getContext(), RD, /*GenerateDefinition=*/false);

// Insert all secondary vpointer indices.
  for (llvm::DenseMap<BaseSubobject, uint64_t>::const_iterator I =
       Builder.getSecondaryVirtualPointerIndices().begin(),
       E = Builder.getSecondaryVirtualPointerIndices().end(); I != E; ++I) {
    std::pair<const CXXRecordDecl *, BaseSubobject> Pair =
      std::make_pair(RD, I->first);

SecondaryVirtualPointerIndices.insert(std::make_pair(Pair, I->second));
  }

I = SecondaryVirtualPointerIndices.find(std::make_pair(RD, Base));
  assert(I != SecondaryVirtualPointerIndices.end() && "Did not find index!");

return I->second;
}

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Editing: CGVTT.cpp

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