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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: EvalEmitter.h

//===--- EvalEmitter.h - Instruction emitter 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
//
//===----------------------------------------------------------------------===//
//
// Defines the instruction emitters.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_INTERP_EVALEMITTER_H
#define LLVM_CLANG_AST_INTERP_EVALEMITTER_H

#include "ByteCodeGenError.h"
#include "Context.h"
#include "InterpStack.h"
#include "InterpState.h"
#include "PrimType.h"
#include "Program.h"
#include "Source.h"
#include "llvm/Support/Error.h"

namespace clang {
class FunctionDecl;
namespace interp {
class Context;
class Function;
class InterpState;
class Program;
class SourceInfo;
enum Opcode : uint32_t;

/// An emitter which evaluates opcodes as they are emitted.
class EvalEmitter : public SourceMapper {
public:
  using LabelTy = uint32_t;
  using AddrTy = uintptr_t;
  using Local = Scope::Local;

llvm::Expected<bool> interpretExpr(const Expr *E);
  llvm::Expected<bool> interpretDecl(const VarDecl *VD);

protected:
  EvalEmitter(Context &Ctx, Program &P, State &Parent, InterpStack &Stk,
              APValue &Result);

virtual ~EvalEmitter() {}

/// Define a label.
  void emitLabel(LabelTy Label);
  /// Create a label.
  LabelTy getLabel();

/// Methods implemented by the compiler.
  virtual bool visitExpr(const Expr *E) = 0;
  virtual bool visitDecl(const VarDecl *VD) = 0;

bool bail(const Stmt *S) { return bail(S->getBeginLoc()); }
  bool bail(const Decl *D) { return bail(D->getBeginLoc()); }
  bool bail(const SourceLocation &Loc);

/// Emits jumps.
  bool jumpTrue(const LabelTy &Label);
  bool jumpFalse(const LabelTy &Label);
  bool jump(const LabelTy &Label);
  bool fallthrough(const LabelTy &Label);

/// Callback for registering a local.
  Local createLocal(Descriptor *D);

/// Returns the source location of the current opcode.
  SourceInfo getSource(Function *F, CodePtr PC) const override {
    return F ? F->getSource(PC) : CurrentSource;
  }

/// Parameter indices.
  llvm::DenseMap<const ParmVarDecl *, unsigned> Params;
  /// Local descriptors.
  llvm::SmallVector<SmallVector<Local, 8>, 2> Descriptors;

private:
  /// Current compilation context.
  Context &Ctx;
  /// Current program.
  Program &P;
  /// Callee evaluation state.
  InterpState S;
  /// Location to write the result to.
  APValue &Result;

/// Temporaries which require storage.
  llvm::DenseMap<unsigned, std::unique_ptr<char[]>> Locals;

// The emitter always tracks the current instruction and sets OpPC to a token
  // value which is mapped to the location of the opcode being evaluated.
  CodePtr OpPC;
  /// Location of a failure.
  llvm::Optional<SourceLocation> BailLocation;
  /// Location of the current instruction.
  SourceInfo CurrentSource;

/// Next label ID to generate - first label is 1.
  LabelTy NextLabel = 1;
  /// Label being executed - 0 is the entry label.
  LabelTy CurrentLabel = 0;
  /// Active block which should be executed.
  LabelTy ActiveLabel = 0;

/// Since expressions can only jump forward, predicated execution is
  /// used to deal with if-else statements.
  bool isActive() { return CurrentLabel == ActiveLabel; }

/// Helper to invoke a method.
  bool ExecuteCall(Function *F, Pointer &&This, const SourceInfo &Info);
  /// Helper to emit a diagnostic on a missing method.
  bool ExecuteNoCall(const FunctionDecl *F, const SourceInfo &Info);

protected:
#define GET_EVAL_PROTO
#include "Opcodes.inc"
#undef GET_EVAL_PROTO
};

} // namespace interp
} // namespace clang

#endif

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Editing: EvalEmitter.h

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