solidity/libyul/backends/wasm/WasmDialect.h
2021-01-18 20:06:12 -05:00

72 lines
1.9 KiB
C++

/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
/**
* Dialects for Wasm.
*/
#pragma once
#include <libyul/Dialect.h>
#include <map>
namespace solidity::yul
{
class YulString;
using Type = YulString;
struct FunctionCall;
struct Object;
/**
* Yul dialect for Wasm as a backend.
*
* Builtin functions are a subset of the wasm instructions.
*
* There is a builtin function `i32.drop` that takes an i32, while `i64.drop` takes i64.
*
*/
struct WasmDialect: public Dialect
{
WasmDialect();
BuiltinFunction const* builtin(YulString _name) const override;
BuiltinFunction const* discardFunction(YulString _type) const override;
BuiltinFunction const* equalityFunction(YulString _type) const override;
BuiltinFunction const* booleanNegationFunction() const override { return builtin("i32.eqz"_yulstring); }
std::set<YulString> fixedFunctionNames() const override { return {"main"_yulstring}; }
static WasmDialect const& instance();
private:
void addExternals();
void addFunction(
std::string _name,
std::vector<YulString> _params,
std::vector<YulString> _returns,
bool _movable = true,
std::vector<std::optional<LiteralKind>> _literalArguments = std::vector<std::optional<LiteralKind>>{}
);
std::map<YulString, BuiltinFunction> m_functions;
};
}