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📄 Boolean.h(4.12 KB)
📄 ByteCodeEmitter.cpp(5.38 KB)
📄 ByteCodeEmitter.h(3.13 KB)
📄 ByteCodeExprGen.cpp(16.6 KB)
📄 ByteCodeExprGen.h(10.2 KB)
📄 ByteCodeGenError.cpp(483 B)
📄 ByteCodeGenError.h(1.36 KB)
📄 ByteCodeStmtGen.cpp(7.21 KB)
📄 ByteCodeStmtGen.h(2.39 KB)
📄 Context.cpp(3.28 KB)
📄 Context.h(2.39 KB)
📄 Descriptor.cpp(10.31 KB)
📄 Descriptor.h(7.82 KB)
📄 Disasm.cpp(1.95 KB)
📄 EvalEmitter.cpp(7.6 KB)
📄 EvalEmitter.h(3.7 KB)
📄 Frame.cpp(464 B)
📄 Frame.h(1.28 KB)
📄 Function.cpp(1.73 KB)
📄 Function.h(4.91 KB)
📄 Integral.h(8.38 KB)
📄 Interp.cpp(11.54 KB)
📄 Interp.h(30.64 KB)
📄 InterpBlock.cpp(1.91 KB)
📄 InterpBlock.h(4.11 KB)
📄 InterpFrame.cpp(5.32 KB)
📄 InterpFrame.h(4.54 KB)
📄 InterpStack.cpp(1.81 KB)
📄 InterpStack.h(3.43 KB)
📄 InterpState.cpp(2.03 KB)
📄 InterpState.h(3.29 KB)
📄 Opcode.h(817 B)
📄 Opcodes.td(11.02 KB)
📄 Pointer.cpp(4.97 KB)
📄 Pointer.h(11.08 KB)
📄 PrimType.cpp(648 B)
📄 PrimType.h(4.66 KB)
📄 Program.cpp(11.29 KB)
📄 Program.h(6.66 KB)
📄 Record.cpp(1.54 KB)
📄 Record.h(3.76 KB)
📄 Source.cpp(1.15 KB)
📄 Source.h(3.25 KB)
📄 State.cpp(5.34 KB)
📄 State.h(4.01 KB)

Editing: Pointer.cpp

//===--- Pointer.cpp - Types for the constexpr VM ---------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//

#include "Pointer.h"
#include "Function.h"
#include "InterpBlock.h"
#include "PrimType.h"

using namespace clang;
using namespace clang::interp;

Pointer::Pointer(Block *Pointee) : Pointer(Pointee, 0, 0) {}

Pointer::Pointer(const Pointer &P) : Pointer(P.Pointee, P.Base, P.Offset) {}

Pointer::Pointer(Pointer &&P)
    : Pointee(P.Pointee), Base(P.Base), Offset(P.Offset) {
  if (Pointee)
    Pointee->movePointer(&P, this);
}

Pointer::Pointer(Block *Pointee, unsigned Base, unsigned Offset)
    : Pointee(Pointee), Base(Base), Offset(Offset) {
  assert((Base == RootPtrMark || Base % alignof(void *) == 0) && "wrong base");
  if (Pointee)
    Pointee->addPointer(this);
}

Pointer::~Pointer() {
  if (Pointee) {
    Pointee->removePointer(this);
    Pointee->cleanup();
  }
}

void Pointer::operator=(const Pointer &P) {
  Block *Old = Pointee;

if (Pointee)
    Pointee->removePointer(this);

Offset = P.Offset;
  Base = P.Base;

Pointee = P.Pointee;
  if (Pointee)
    Pointee->addPointer(this);

if (Old)
    Old->cleanup();
}

void Pointer::operator=(Pointer &&P) {
  Block *Old = Pointee;

if (Pointee)
    Pointee->removePointer(this);

Offset = P.Offset;
  Base = P.Base;

Pointee = P.Pointee;
  if (Pointee)
    Pointee->movePointer(&P, this);

if (Old)
    Old->cleanup();
}

APValue Pointer::toAPValue() const {
  APValue::LValueBase Base;
  llvm::SmallVector<APValue::LValuePathEntry, 5> Path;
  CharUnits Offset;
  bool IsNullPtr;
  bool IsOnePastEnd;

if (isZero()) {
    Base = static_cast<const Expr *>(nullptr);
    IsNullPtr = true;
    IsOnePastEnd = false;
    Offset = CharUnits::Zero();
  } else {
    // Build the lvalue base from the block.
    Descriptor *Desc = getDeclDesc();
    if (auto *VD = Desc->asValueDecl())
      Base = VD;
    else if (auto *E = Desc->asExpr())
      Base = E;
    else
      llvm_unreachable("Invalid allocation type");

// Not a null pointer.
    IsNullPtr = false;

if (isUnknownSizeArray()) {
      IsOnePastEnd = false;
      Offset = CharUnits::Zero();
    } else {
      // TODO: compute the offset into the object.
      Offset = CharUnits::Zero();

// Build the path into the object.
      Pointer Ptr = *this;
      while (Ptr.isField()) {
        if (Ptr.isArrayElement()) {
          Path.push_back(APValue::LValuePathEntry::ArrayIndex(Ptr.getIndex()));
          Ptr = Ptr.getArray();
        } else {
          // TODO: figure out if base is virtual
          bool IsVirtual = false;

// Create a path entry for the field.
          Descriptor *Desc = Ptr.getFieldDesc();
          if (auto *BaseOrMember = Desc->asDecl()) {
            Path.push_back(APValue::LValuePathEntry({BaseOrMember, IsVirtual}));
            Ptr = Ptr.getBase();
            continue;
          }
          llvm_unreachable("Invalid field type");
        }
      }

IsOnePastEnd = isOnePastEnd();
    }
  }

return APValue(Base, Offset, Path, IsOnePastEnd, IsNullPtr);
}

bool Pointer::isInitialized() const {
  assert(Pointee && "Cannot check if null pointer was initialized");
  Descriptor *Desc = getFieldDesc();
  if (Desc->isPrimitiveArray()) {
    if (Pointee->IsStatic)
      return true;
    // Primitive array field are stored in a bitset.
    InitMap *Map = getInitMap();
    if (!Map)
      return false;
    if (Map == (InitMap *)-1)
      return true;
    return Map->isInitialized(getIndex());
  } else {
    // Field has its bit in an inline descriptor.
    return Base == 0 || getInlineDesc()->IsInitialized;
  }
}

void Pointer::initialize() const {
  assert(Pointee && "Cannot initialize null pointer");
  Descriptor *Desc = getFieldDesc();
  if (Desc->isPrimitiveArray()) {
    if (!Pointee->IsStatic) {
      // Primitive array initializer.
      InitMap *&Map = getInitMap();
      if (Map == (InitMap *)-1)
        return;
      if (Map == nullptr)
        Map = InitMap::allocate(Desc->getNumElems());
      if (Map->initialize(getIndex())) {
        free(Map);
        Map = (InitMap *)-1;
      }
    }
  } else {
    // Field has its bit in an inline descriptor.
    assert(Base != 0 && "Only composite fields can be initialised");
    getInlineDesc()->IsInitialized = true;
  }
}

void Pointer::activate() const {
  // Field has its bit in an inline descriptor.
  assert(Base != 0 && "Only composite fields can be initialised");
  getInlineDesc()->IsActive = true;
}

void Pointer::deactivate() const {
  // TODO: this only appears in constructors, so nothing to deactivate.
}

bool Pointer::hasSameBase(const Pointer &A, const Pointer &B) {
  return A.Pointee == B.Pointee;
}

bool Pointer::hasSameArray(const Pointer &A, const Pointer &B) {
  return A.Base == B.Base && A.getFieldDesc()->IsArray;
}

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Editing: Pointer.cpp

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