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Merge pull request #9501 from ethereum/calldataToMemoryCopy

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[Sol->Yul] Implementing bytes copying from calldata to memory.
This commit is contained in:
chriseth
2020-07-27 19:23:30 +02:00
committed by GitHub
parent 81cdc39f51 96258c7e75
commit ee9a03ffe1
11 changed files with 53 additions and 0 deletions
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libsolidity/codegen/YulUtilFunctions.cpp
+23
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@@ -2406,6 +2406,29 @@ string YulUtilFunctions::conversionFunctionSpecial(Type const& _from, Type const
.render();
}
if (_from.category() == Type::Category::Array && _to.category() == Type::Category::Array)
{
auto const& fromArrayType = dynamic_cast<ArrayType const&>(_from);
auto const& toArrayType = dynamic_cast<ArrayType const&>(_to);
solAssert(!fromArrayType.baseType()->isDynamicallyEncoded(), "");
solUnimplementedAssert(fromArrayType.isByteArray() && toArrayType.isByteArray(), "");
solUnimplementedAssert(toArrayType.location() == DataLocation::Memory, "");
solUnimplementedAssert(fromArrayType.location() == DataLocation::CallData, "");
solUnimplementedAssert(toArrayType.isDynamicallySized(), "");
Whiskers templ(R"(
function <functionName>(offset, length) -> converted {
converted := <allocateMemoryArray>(length)
<copyToMemory>(offset, add(converted, 0x20), length)
}
)");
templ("functionName", functionName);
templ("allocateMemoryArray", allocateMemoryArrayFunction(toArrayType));
templ("copyToMemory", copyToMemoryFunction(fromArrayType.location() == DataLocation::CallData));
return templ.render();
}
solUnimplementedAssert(
_from.category() == Type::Category::StringLiteral,
"Type conversion " + _from.toString() + " -> " + _to.toString() + " not yet implemented."