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Remove the need of jumping out of the fallback

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This commit is contained in:
Alex Beregszaszi 2017-06-29 09:48:53 +01:00
parent d4e44ecb46
commit 7d37eba4ba
2 changed files with 5 additions and 8 deletions
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1
Changelog.md
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@ -2,6 +2,7 @@
Features:
* C API (``jsonCompiler``): Export the ``license`` method.
* Code Generator: Optimise the fallback function, by removing a useless jump.
* Inline Assembly: Show useful error message if trying to access calldata variables.
* Inline Assembly: Support variable declaration without initial value (defaults to 0).
* Metadata: Only include files which were used to compile the given contract.

12
libsolidity/codegen/ContractCompiler.cpp
View File

@ -267,18 +267,13 @@ void ContractCompiler::appendFunctionSelector(ContractDefinition const& _contrac
m_context << notFound;
if (fallback)
{
m_context.setStackOffset(0);
if (!fallback->isPayable())
appendCallValueCheck();
// Return tag is used to jump out of the function.
eth::AssemblyItem returnTag = m_context.pushNewTag();
fallback->accept(*this);
m_context << returnTag;
solAssert(fallback->isFallback(), "");
solAssert(FunctionType(*fallback).parameterTypes().empty(), "");
solAssert(FunctionType(*fallback).returnParameterTypes().empty(), "");
// Return tag gets consumed.
m_context.adjustStackOffset(-1);
fallback->accept(*this);
m_context << Instruction::STOP;
}
else
@ -536,7 +531,8 @@ bool ContractCompiler::visit(FunctionDefinition const& _function)
m_context.adjustStackOffset(-(int)c_returnValuesSize);
if (!_function.isConstructor())
/// The constructor and the fallback function doesn't to jump out.
if (!_function.isConstructor() && !_function.isFallback())
m_context.appendJump(eth::AssemblyItem::JumpType::OutOfFunction);
return false;
}