c22a2fdf4d
Remove incorrect comments, unused includes, an unused function and make the Ctx member debug-build-only.
111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
//===------ EvaluationResult.h - Result class for the 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CLANG_AST_INTERP_EVALUATION_RESULT_H
|
|
#define LLVM_CLANG_AST_INTERP_EVALUATION_RESULT_H
|
|
|
|
#include "clang/AST/APValue.h"
|
|
#include "clang/AST/Decl.h"
|
|
#include "clang/AST/Expr.h"
|
|
|
|
namespace clang {
|
|
namespace interp {
|
|
class EvalEmitter;
|
|
class Context;
|
|
class Pointer;
|
|
class SourceInfo;
|
|
class InterpState;
|
|
|
|
/// Defines the result of an evaluation.
|
|
///
|
|
/// The Kind defined if the evaluation was invalid, valid (but empty, e.g. for
|
|
/// void expressions) or if we have a valid evaluation result.
|
|
///
|
|
/// We use this class to inspect and diagnose the result, as well as
|
|
/// convert it to the requested form.
|
|
class EvaluationResult final {
|
|
public:
|
|
enum ResultKind {
|
|
Empty, // Initial state.
|
|
Invalid, // Result is invalid.
|
|
Valid, // Result is valid and empty.
|
|
};
|
|
|
|
using DeclTy = llvm::PointerUnion<const Decl *, const Expr *>;
|
|
|
|
private:
|
|
#ifndef NDEBUG
|
|
const Context *Ctx = nullptr;
|
|
#endif
|
|
APValue Value;
|
|
ResultKind Kind = Empty;
|
|
DeclTy Source = nullptr;
|
|
|
|
void setSource(DeclTy D) { Source = D; }
|
|
|
|
void takeValue(APValue &&V) {
|
|
assert(empty());
|
|
Value = std::move(V);
|
|
}
|
|
void setInvalid() {
|
|
// We are NOT asserting empty() here, since setting it to invalid
|
|
// is allowed even if there is already a result.
|
|
Kind = Invalid;
|
|
}
|
|
void setValid() {
|
|
assert(empty());
|
|
Kind = Valid;
|
|
}
|
|
|
|
public:
|
|
#ifndef NDEBUG
|
|
EvaluationResult(const Context *Ctx) : Ctx(Ctx) {}
|
|
#else
|
|
EvaluationResult(const Context *Ctx) {}
|
|
#endif
|
|
|
|
bool empty() const { return Kind == Empty; }
|
|
bool isInvalid() const { return Kind == Invalid; }
|
|
|
|
/// Returns an APValue for the evaluation result.
|
|
APValue toAPValue() const {
|
|
assert(!empty());
|
|
assert(!isInvalid());
|
|
return Value;
|
|
}
|
|
|
|
APValue stealAPValue() { return std::move(Value); }
|
|
|
|
/// Check that all subobjects of the given pointer have been initialized.
|
|
bool checkFullyInitialized(InterpState &S, const Pointer &Ptr) const;
|
|
/// Check that none of the blocks the given pointer (transitively) points
|
|
/// to are dynamically allocated.
|
|
bool checkReturnValue(InterpState &S, const Context &Ctx, const Pointer &Ptr,
|
|
const SourceInfo &Info);
|
|
|
|
QualType getSourceType() const {
|
|
if (const auto *D =
|
|
dyn_cast_if_present<ValueDecl>(Source.dyn_cast<const Decl *>()))
|
|
return D->getType();
|
|
if (const auto *E = Source.dyn_cast<const Expr *>())
|
|
return E->getType();
|
|
return QualType();
|
|
}
|
|
|
|
/// Dump to stderr.
|
|
void dump() const;
|
|
|
|
friend class EvalEmitter;
|
|
friend class InterpState;
|
|
};
|
|
|
|
} // namespace interp
|
|
} // namespace clang
|
|
|
|
#endif
|