cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Allow basefee as Yul identifier for EVMVersion < london

Browse Source 
This was done to prevent basefee from being a breaking change. This change will be removed in 0.9.0.

TODO revert this commit in breaking.
This commit is contained in:
hrkrshnn 2021-08-09 12:40:14 +02:00
parent 79733fca48
commit 7f1a2be0fe
3 changed files with 14 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
libyul/backends/evm/EVMDialect.cpp
View File

@ -112,14 +112,22 @@ pair<YulString, BuiltinFunctionForEVM> createFunction(
return {name, f};
}
set<YulString> createReservedIdentifiers()
set<YulString> createReservedIdentifiers(langutil::EVMVersion _evmVersion)
{
// TODO remove this in 0.9.0. We allow creating functions or identifiers in Yul with the name
// basefee for VMs before london.
auto baseFeeException = [&](evmasm::Instruction _instr) -> bool
{
return _instr == evmasm::Instruction::BASEFEE && _evmVersion < langutil::EVMVersion::london();
};
set<YulString> reserved;
for (auto const& instr: evmasm::c_instructions)
{
string name = instr.first;
transform(name.begin(), name.end(), name.begin(), [](unsigned char _c) { return tolower(_c); });
reserved.emplace(name);
if (!baseFeeException(instr.second))
reserved.emplace(name);
}
reserved += vector<YulString>{
"linkersymbol"_yulstring,
@ -300,7 +308,7 @@ EVMDialect::EVMDialect(langutil::EVMVersion _evmVersion, bool _objectAccess):
m_objectAccess(_objectAccess),
m_evmVersion(_evmVersion),
m_functions(createBuiltins(_evmVersion, _objectAccess)),
m_reserved(createReservedIdentifiers())
m_reserved(createReservedIdentifiers(_evmVersion))
{
}

3
scripts/error_codes.py
View File

@ -198,7 +198,8 @@ def examine_id_coverage(top_dir, source_id_to_file_names, new_ids_only=False):
# The warning may or may not exist in a compiler build.
"4591", # "There are more than 256 warnings. Ignoring the rest."
# Due to 3805, the warning lists look different for different compiler builds.
"1834" # Unimplemented feature error, as we do not test it anymore via cmdLineTests
"1834", # Unimplemented feature error, as we do not test it anymore via cmdLineTests
"5430" # basefee being used in inline assembly for EVMVersion < london
}
assert len(test_ids & white_ids) == 0, "The sets are not supposed to intersect"
test_ids |= white_ids

8
test/libsolidity/syntaxTests/types/magic_block_basefee_error.sol
View File

@ -2,14 +2,8 @@ contract C {
function f() public view returns (uint) {
return block.basefee;
}
function g() public view returns (uint ret) {
assembly {
ret := basefee()
}
}
}
// ====
// EVMVersion: =berlin
// EVMVersion: <=berlin
// ----
// TypeError 5921: (74-87): "basefee" is not supported by the VM version.
// TypeError 5430: (183-190): The "basefee" instruction is only available for London-compatible VMs (you are currently compiling for "berlin").