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Add another argument to setimmutable and the AssignImmutable opcode, allowing to modify code at any memory offset.

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This commit is contained in:
Daniel Kirchner
2020-10-15 18:14:41 +02:00
parent 00fb152316
commit 0dca223b45
12 changed files with 58 additions and 32 deletions
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libyul/backends/evm/EVMDialect.cpp
+6 -5
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@@ -221,21 +221,22 @@ map<YulString, BuiltinFunctionForEVM> createBuiltins(langutil::EVMVersion _evmVe
));
builtins.emplace(createFunction(
"setimmutable",
2,
3,
0,
SideEffects{false, false, false, false, true, SideEffects::None, SideEffects::None, SideEffects::Write},
{LiteralKind::String, std::nullopt},
{std::nullopt, LiteralKind::String, std::nullopt},
[](
FunctionCall const& _call,
AbstractAssembly& _assembly,
BuiltinContext&,
std::function<void(Expression const&)> _visitExpression
) {
yulAssert(_call.arguments.size() == 2, "");
yulAssert(_call.arguments.size() == 3, "");
_visitExpression(_call.arguments[1]);
_visitExpression(_call.arguments[2]);
YulString identifier = std::get<Literal>(_call.arguments[1]).value;
_visitExpression(_call.arguments[0]);
_assembly.setSourceLocation(_call.location);
YulString identifier = std::get<Literal>(_call.arguments.front()).value;
_assembly.appendImmutableAssignment(identifier.str());
}
));