Server : Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips PHP/7.4.20 System : Linux st2.domain.com 3.10.0-1127.10.1.el7.x86_64 #1 SMP Wed Jun 3 14:28:03 UTC 2020 x86_64 User : apache ( 48) PHP Version : 7.4.20 Disable Function : NONE Directory : /home/real/node-v13.0.1/deps/v8/src/wasm/ |
// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_WASM_LOCAL_DECL_ENCODER_H_
#define V8_WASM_LOCAL_DECL_ENCODER_H_
#include "src/common/globals.h"
#include "src/wasm/wasm-opcodes.h"
#include "src/zone/zone-containers.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
namespace wasm {
// A helper for encoding local declarations prepended to the body of a
// function.
class V8_EXPORT_PRIVATE LocalDeclEncoder {
public:
explicit LocalDeclEncoder(Zone* zone, FunctionSig* s = nullptr)
: sig(s), local_decls(zone), total(0) {}
// Prepend local declarations by creating a new buffer and copying data
// over. The new buffer must be delete[]'d by the caller.
void Prepend(Zone* zone, const byte** start, const byte** end) const;
size_t Emit(byte* buffer) const;
// Add locals declarations to this helper. Return the index of the newly added
// local(s), with an optional adjustment for the parameters.
uint32_t AddLocals(uint32_t count, ValueType type);
size_t Size() const;
bool has_sig() const { return sig != nullptr; }
FunctionSig* get_sig() const { return sig; }
void set_sig(FunctionSig* s) { sig = s; }
private:
FunctionSig* sig;
ZoneVector<std::pair<uint32_t, ValueType>> local_decls;
size_t total;
};
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_WASM_LOCAL_DECL_ENCODER_H_