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Refined cleanup.

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This commit is contained in:
chriseth 2020-12-08 21:12:12 +01:00
parent c812d928fd
commit fc0e571a07
1 changed files with 11 additions and 6 deletions
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17
libyul/optimiser/NameSimplifier.cpp
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@ -81,24 +81,29 @@ void NameSimplifier::findSimplification(YulString const& _name)
string name = _name.str();
static auto replacements = vector<pair<regex, string>>{
{regex("_\\$\\d+"), ""}, // removes AST IDs
{regex("_\\$|\\$_"), "_"}, // remove type mangling delimiters
{regex("_[0-9]+([^0-9a-fA-Fx])"), "$1"}, // removes AST IDs that are not hex.
{regex("_[0-9]+$"), ""}, // removes AST IDs that are not hex.
{regex("_t_"), "_"}, // remove type prefixes
{regex("__"), "_"},
{regex("(abi_..code.*)_to_.*"), "$1"}, // removes _to... for abi functions
{regex("(stringliteral_[0-9a-f][0-9a-f][0-9a-f][0-9a-f])[0-9a-f]*"), "$1"}, // shorten string literal
{regex("tuple_t_"), ""},
{regex("(stringliteral_?[0-9a-f][0-9a-f][0-9a-f][0-9a-f])[0-9a-f]*"), "$1"}, // shorten string literal
{regex("tuple_"), ""},
{regex("_memory_ptr"), ""},
{regex("_calldata_ptr"), "_calldata"},
{regex("_fromStack"), ""},
{regex("_storage_storage"), "_storage"},
{regex("(storage.*)_?storage"), "$1"},
{regex("_memory_memory"), "_memory"},
{regex("t_contract\\$_([^_]*)_"), "$1_"},
{regex("index_access_t_array"), "index_access"},
{regex("_contract\\$_([^_]*)_?"), "$1_"},
{regex("index_access_(t_)?array"), "index_access"},
{regex("[0-9]*_$"), ""}
};
for (auto const& [pattern, substitute]: replacements)
{
string candidate = regex_replace(name, pattern, substitute);
if (!m_context.dispenser.illegalName(YulString(candidate)))
if (!candidate.empty() && !m_context.dispenser.illegalName(YulString(candidate)))
name = candidate;
}