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[Sol - Yul] Add support for ABIDecode.

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This commit is contained in:
Alexander Arlt
2020-05-26 13:30:37 -05:00
parent 50b200a5d5
commit 118cb13476
11 changed files with 62 additions and 1 deletions
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libsolidity/codegen/ir/IRGeneratorForStatements.cpp
+39 -1
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@@ -884,6 +884,45 @@ void IRGeneratorForStatements::endVisit(FunctionCall const& _functionCall)
m_code << templ.render();
break;
}
case FunctionType::Kind::ABIDecode:
{
Whiskers templ(R"(
<?+retVars>let <retVars> := </+retVars> <abiDecode>(<offset>, add(<offset>, <length>))
)");
TypePointer firstArgType = arguments.front()->annotation().type;
TypePointers targetTypes;
if (TupleType const* targetTupleType = dynamic_cast<TupleType const*>(_functionCall.annotation().type))
targetTypes = targetTupleType->components();
else
targetTypes = TypePointers{_functionCall.annotation().type};
if (
auto referenceType = dynamic_cast<ReferenceType const*>(firstArgType);
referenceType && referenceType->dataStoredIn(DataLocation::CallData)
)
{
solAssert(referenceType->isImplicitlyConvertibleTo(*TypeProvider::bytesCalldata()), "");
IRVariable var = convert(*arguments[0], *TypeProvider::bytesCalldata());
templ("abiDecode", m_context.abiFunctions().tupleDecoder(targetTypes, false));
templ("offset", var.part("offset").name());
templ("length", var.part("length").name());
}
else
{
IRVariable var = convert(*arguments[0], *TypeProvider::bytesMemory());
templ("abiDecode", m_context.abiFunctions().tupleDecoder(targetTypes, true));
templ("offset", "add(" + var.part("mpos").name() + ", 32)");
templ("length",
m_utils.arrayLengthFunction(*TypeProvider::bytesMemory()) + "(" + var.part("mpos").name() + ")"
);
}
templ("retVars", IRVariable(_functionCall).commaSeparatedList());
m_code << templ.render();
break;
}
case FunctionType::Kind::Revert:
{
solAssert(arguments.size() == parameterTypes.size(), "");
@@ -1369,7 +1408,6 @@ void IRGeneratorForStatements::endVisit(MemberAccess const& _memberAccess)
else if (member == "data")
{
IRVariable var(_memberAccess);
declare(var);
define(var.part("offset")) << "0\n";
define(var.part("length")) << "calldatasize()\n";
}