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Merge pull request #5240 from ethereum/limitDispenserSize

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[Yul] Limit name length created by dispenser
This commit is contained in:
chriseth
2018-10-17 22:54:38 +02:00
committed by GitHub
parent c578b21e7c 732d09cef1
commit 7609e2871e
8 changed files with 97 additions and 25 deletions
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libyul/optimiser/FullInliner.cpp
+4 -10
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@@ -41,11 +41,10 @@ using namespace dev::yul;
using namespace dev::solidity;
FullInliner::FullInliner(Block& _ast):
m_ast(_ast)
m_ast(_ast), m_nameDispenser(_ast)
{
assertThrow(m_ast.statements.size() >= 1, OptimizerException, "");
assertThrow(m_ast.statements.front().type() == typeid(Block), OptimizerException, "");
m_nameDispenser.m_usedNames = NameCollector(m_ast).names();
// Determine constants
SSAValueTracker tracker;
@@ -157,7 +156,7 @@ vector<Statement> InlineModifier::performInline(Statement& _statement, FunctionC
// helper function to create a new variable that is supposed to model
// an existing variable.
auto newVariable = [&](TypedName const& _existingVariable, Expression* _value) {
string newName = m_nameDispenser.newName(function.name + "_" + _existingVariable.name);
string newName = m_nameDispenser.newName(_existingVariable.name, function.name);
variableReplacements[_existingVariable.name] = newName;
VariableDeclaration varDecl{_funCall.location, {{_funCall.location, newName, _existingVariable.type}}, {}};
if (_value)
@@ -170,7 +169,7 @@ vector<Statement> InlineModifier::performInline(Statement& _statement, FunctionC
for (auto const& var: function.returnVariables)
newVariable(var, nullptr);
Statement newBody = BodyCopier(m_nameDispenser, function.name + "_", variableReplacements)(function.body);
Statement newBody = BodyCopier(m_nameDispenser, function.name, variableReplacements)(function.body);
newStatements += std::move(boost::get<Block>(newBody).statements);
boost::apply_visitor(GenericFallbackVisitor<Assignment, VariableDeclaration>{
@@ -203,15 +202,10 @@ vector<Statement> InlineModifier::performInline(Statement& _statement, FunctionC
return newStatements;
}
string InlineModifier::newName(string const& _prefix)
{
return m_nameDispenser.newName(_prefix);
}
Statement BodyCopier::operator()(VariableDeclaration const& _varDecl)
{
for (auto const& var: _varDecl.variables)
m_variableReplacements[var.name] = m_nameDispenser.newName(m_varNamePrefix + var.name);
m_variableReplacements[var.name] = m_nameDispenser.newName(var.name, m_varNamePrefix);
return ASTCopier::operator()(_varDecl);
}