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usr / src / contrib / llvm-project / clang / lib / AST / Interp /

📁 ..
📄 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: Context.cpp

//===--- Context.cpp - Context 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 "Context.h"
#include "ByteCodeEmitter.h"
#include "ByteCodeExprGen.h"
#include "ByteCodeStmtGen.h"
#include "EvalEmitter.h"
#include "Interp.h"
#include "InterpFrame.h"
#include "InterpStack.h"
#include "PrimType.h"
#include "Program.h"
#include "clang/AST/Expr.h"
#include "clang/Basic/TargetInfo.h"

using namespace clang;
using namespace clang::interp;

Context::Context(ASTContext &Ctx) : Ctx(Ctx), P(new Program(*this)) {}

Context::~Context() {}

bool Context::isPotentialConstantExpr(State &Parent, const FunctionDecl *FD) {
  Function *Func = P->getFunction(FD);
  if (!Func) {
    if (auto R = ByteCodeStmtGen<ByteCodeEmitter>(*this, *P).compileFunc(FD)) {
      Func = *R;
    } else {
      handleAllErrors(R.takeError(), [&Parent](ByteCodeGenError &Err) {
        Parent.FFDiag(Err.getLoc(), diag::err_experimental_clang_interp_failed);
      });
      return false;
    }
  }

if (!Func->isConstexpr())
    return false;

APValue Dummy;
  return Run(Parent, Func, Dummy);
}

bool Context::evaluateAsRValue(State &Parent, const Expr *E, APValue &Result) {
  ByteCodeExprGen<EvalEmitter> C(*this, *P, Parent, Stk, Result);
  return Check(Parent, C.interpretExpr(E));
}

bool Context::evaluateAsInitializer(State &Parent, const VarDecl *VD,
                                    APValue &Result) {
  ByteCodeExprGen<EvalEmitter> C(*this, *P, Parent, Stk, Result);
  return Check(Parent, C.interpretDecl(VD));
}

const LangOptions &Context::getLangOpts() const { return Ctx.getLangOpts(); }

llvm::Optional<PrimType> Context::classify(QualType T) {
  if (T->isReferenceType() || T->isPointerType()) {
    return PT_Ptr;
  }

if (T->isBooleanType())
    return PT_Bool;

if (T->isSignedIntegerOrEnumerationType()) {
    switch (Ctx.getIntWidth(T)) {
    case 64:
      return PT_Sint64;
    case 32:
      return PT_Sint32;
    case 16:
      return PT_Sint16;
    case 8:
      return PT_Sint8;
    default:
      return {};
    }
  }

if (T->isUnsignedIntegerOrEnumerationType()) {
    switch (Ctx.getIntWidth(T)) {
    case 64:
      return PT_Uint64;
    case 32:
      return PT_Uint32;
    case 16:
      return PT_Uint16;
    case 8:
      return PT_Uint8;
    default:
      return {};
    }
  }

if (T->isNullPtrType())
    return PT_Ptr;

if (auto *AT = dyn_cast<AtomicType>(T))
    return classify(AT->getValueType());

return {};
}

unsigned Context::getCharBit() const {
  return Ctx.getTargetInfo().getCharWidth();
}

bool Context::Run(State &Parent, Function *Func, APValue &Result) {
  InterpState State(Parent, *P, Stk, *this);
  State.Current = new InterpFrame(State, Func, nullptr, {}, {});
  if (Interpret(State, Result))
    return true;
  Stk.clear();
  return false;
}

bool Context::Check(State &Parent, llvm::Expected<bool> &&Flag) {
  if (Flag)
    return *Flag;
  handleAllErrors(Flag.takeError(), [&Parent](ByteCodeGenError &Err) {
    Parent.FFDiag(Err.getLoc(), diag::err_experimental_clang_interp_failed);
  });
  return false;
}

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Editing: Context.cpp

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