aboutsummaryrefslogtreecommitdiffstats
path: root/libyul/backends/evm/EVMDialect.cpp
blob: 1850211741baf6cd0683fc9986dd801359442e14 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/*
    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/>.
*/
/**
 * Yul dialects for EVM.
 */

#include <libyul/backends/evm/EVMDialect.h>

#include <libyul/AsmAnalysisInfo.h>
#include <libyul/AsmData.h>
#include <libyul/Object.h>
#include <libyul/backends/evm/AbstractAssembly.h>

#include <liblangutil/Exceptions.h>

#include <libyul/Exceptions.h>

#include <boost/range/adaptor/reversed.hpp>

using namespace std;
using namespace dev;
using namespace yul;
using namespace dev::solidity;


EVMDialect::EVMDialect(AsmFlavour _flavour, bool _objectAccess):
    Dialect{_flavour}, m_objectAccess(_objectAccess)
{
    // The EVM instructions will be moved to builtins at some point.
    if (!m_objectAccess)
        return;

    addFunction("datasize", 1, 1, true, true, [this](
        FunctionCall const& _call,
        AbstractAssembly& _assembly,
        std::function<void()>
    ) {
        yulAssert(m_currentObject, "No object available.");
        yulAssert(_call.arguments.size() == 1, "");
        Expression const& arg = _call.arguments.front();
        YulString dataName = boost::get<Literal>(arg).value;
        if (m_currentObject->name == dataName)
            _assembly.appendAssemblySize();
        else
            _assembly.appendDataSize(m_subIDs.at(dataName));
    });
    addFunction("dataoffset", 1, 1, true, true, [this](
        FunctionCall const& _call,
        AbstractAssembly& _assembly,
        std::function<void()>
    ) {
        yulAssert(m_currentObject, "No object available.");
        yulAssert(_call.arguments.size() == 1, "");
        Expression const& arg = _call.arguments.front();
        YulString dataName = boost::get<Literal>(arg).value;
        if (m_currentObject->name == dataName)
            _assembly.appendConstant(0);
        else
            _assembly.appendDataOffset(m_subIDs.at(dataName));
    });
    addFunction("datacopy", 3, 0, false, false, [](
        FunctionCall const&,
        AbstractAssembly& _assembly,
        std::function<void()> _visitArguments
    ) {
        _visitArguments();
        _assembly.appendInstruction(solidity::Instruction::CODECOPY);
    });
}

BuiltinFunctionForEVM const* EVMDialect::builtin(YulString _name) const
{
    auto it = m_functions.find(_name);
    if (it != m_functions.end())
        return &it->second;
    else
        return nullptr;
}

shared_ptr<EVMDialect> EVMDialect::looseAssemblyForEVM()
{
    return make_shared<EVMDialect>(AsmFlavour::Loose, false);
}

shared_ptr<EVMDialect> EVMDialect::strictAssemblyForEVM()
{
    return make_shared<EVMDialect>(AsmFlavour::Strict, false);
}

shared_ptr<EVMDialect> EVMDialect::strictAssemblyForEVMObjects()
{
    return make_shared<EVMDialect>(AsmFlavour::Strict, true);
}

shared_ptr<yul::EVMDialect> EVMDialect::yulForEVM()
{
    return make_shared<EVMDialect>(AsmFlavour::Yul, false);
}

void EVMDialect::setSubIDs(map<YulString, AbstractAssembly::SubID> _subIDs)
{
    yulAssert(m_objectAccess, "Sub IDs set with dialect that does not support object access.");
    m_subIDs = std::move(_subIDs);
}

void EVMDialect::setCurrentObject(Object const* _object)
{
    yulAssert(m_objectAccess, "Current object set with dialect that does not support object access.");
    m_currentObject = _object;
}

void EVMDialect::addFunction(
    string _name,
    size_t _params,
    size_t _returns,
    bool _movable,
    bool _literalArguments,
    std::function<void(FunctionCall const&, AbstractAssembly&, std::function<void()>)> _generateCode
)
{
    YulString name{std::move(_name)};
    BuiltinFunctionForEVM& f = m_functions[name];
    f.name = name;
    f.parameters.resize(_params);
    f.returns.resize(_returns);
    f.movable = _movable;
    f.literalArguments = _literalArguments;
    f.generateCode = std::move(_generateCode);
}