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Evaluate keccak256 of string literals at compile-time.

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This commit is contained in:
chriseth
2020-07-08 16:14:14 +02:00
parent ad5ae2eefe
commit 0a0f578d7c
4 changed files with 50 additions and 15 deletions
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libsolidity/codegen/ir/IRGeneratorForStatements.cpp
+21 -11
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@@ -1020,18 +1020,28 @@ void IRGeneratorForStatements::endVisit(FunctionCall const& _functionCall)
ArrayType const* arrayType = TypeProvider::bytesMemory();
auto array = convert(*arguments[0], *arrayType);
if (auto const* stringLiteral = dynamic_cast<StringLiteralType const*>(arguments.front()->annotation().type))
{
// Optimization: Compute keccak256 on string literals at compile-time.
define(_functionCall) <<
("0x" + keccak256(stringLiteral->value()).hex()) <<
"\n";
}
else
{
auto array = convert(*arguments[0], *arrayType);
define(_functionCall) <<
"keccak256(" <<
m_utils.arrayDataAreaFunction(*arrayType) <<
"(" <<
array.commaSeparatedList() <<
"), " <<
m_utils.arrayLengthFunction(*arrayType) <<
"(" <<
array.commaSeparatedList() <<
"))\n";
define(_functionCall) <<
"keccak256(" <<
m_utils.arrayDataAreaFunction(*arrayType) <<
"(" <<
array.commaSeparatedList() <<
"), " <<
m_utils.arrayLengthFunction(*arrayType) <<
"(" <<
array.commaSeparatedList() <<
"))\n";
}
break;
}
case FunctionType::Kind::ArrayPop: