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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: Context.h

//===--- Context.h - 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
//
//===----------------------------------------------------------------------===//
//
// Defines the constexpr execution context.
//
// The execution context manages cached bytecode and the global context.
// It invokes the compiler and interpreter, propagating errors.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_INTERP_CONTEXT_H
#define LLVM_CLANG_AST_INTERP_CONTEXT_H

#include "Context.h"
#include "InterpStack.h"
#include "clang/AST/APValue.h"
#include "llvm/ADT/PointerIntPair.h"

namespace clang {
class ASTContext;
class LangOptions;
class Stmt;
class FunctionDecl;
class VarDecl;

namespace interp {
class Function;
class Program;
class State;
enum PrimType : unsigned;

/// Holds all information required to evaluate constexpr code in a module.
class Context {
public:
  /// Initialises the constexpr VM.
  Context(ASTContext &Ctx);

/// Cleans up the constexpr VM.
  ~Context();

/// Checks if a function is a potential constant expression.
  bool isPotentialConstantExpr(State &Parent, const FunctionDecl *FnDecl);

/// Evaluates a toplevel expression as an rvalue.
  bool evaluateAsRValue(State &Parent, const Expr *E, APValue &Result);

/// Evaluates a toplevel initializer.
  bool evaluateAsInitializer(State &Parent, const VarDecl *VD, APValue &Result);

/// Returns the AST context.
  ASTContext &getASTContext() const { return Ctx; }
  /// Returns the language options.
  const LangOptions &getLangOpts() const;
  /// Returns the interpreter stack.
  InterpStack &getStack() { return Stk; }
  /// Returns CHAR_BIT.
  unsigned getCharBit() const;

/// Classifies an expression.
  llvm::Optional<PrimType> classify(QualType T);

private:
  /// Runs a function.
  bool Run(State &Parent, Function *Func, APValue &Result);

/// Checks a result fromt the interpreter.
  bool Check(State &Parent, llvm::Expected<bool> &&R);

private:
  /// Current compilation context.
  ASTContext &Ctx;
  /// Interpreter stack, shared across invocations.
  InterpStack Stk;
  /// Constexpr program.
  std::unique_ptr<Program> P;
};

} // namespace interp
} // namespace clang

#endif

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