Merge pull request #5416 from ethereum/develop

Merge develop into release for 0.5.0

1 files changed, 51 insertions, 0 deletions

diff --git a/libyul/optimiser/FunctionHoister.cpp b/libyul/optimiser/FunctionHoister.cpp
new file mode 100644
index 00000000..c196dead
--- /dev/null
+++ b/libyul/optimiser/FunctionHoister.cpp
@@ -0,0 +1,51 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * Optimiser component that changes the code so that it consists of a block starting with
+ * a single block followed only by function definitions and with no functions defined
+ * anywhere else.
+ */
+
+#include <libyul/optimiser/FunctionHoister.h>
+#include <libyul/optimiser/Utilities.h>
+
+#include <libsolidity/inlineasm/AsmData.h>
+
+#include <libdevcore/CommonData.h>
+
+using namespace std;
+using namespace dev;
+using namespace dev::yul;
+using namespace dev::solidity;
+
+void FunctionHoister::operator()(Block& _block)
+{
+	bool topLevel = m_isTopLevel;
+	m_isTopLevel = false;
+	for (auto&& statement: _block.statements)
+	{
+		boost::apply_visitor(*this, statement);
+		if (statement.type() == typeid(FunctionDefinition))
+		{
+			m_functions.emplace_back(std::move(statement));
+			statement = Block{_block.location, {}};
+		}
+	}
+	removeEmptyBlocks(_block);
+	if (topLevel)
+		_block.statements += std::move(m_functions);
+}