Utility to remove empty blocks.

2 files changed, 73 insertions, 0 deletions

diff --git a/libjulia/optimiser/Utilities.cpp b/libjulia/optimiser/Utilities.cpp
new file mode 100644
index 00000000..ff108b89
--- /dev/null
+++ b/libjulia/optimiser/Utilities.cpp
@@ -0,0 +1,39 @@
+/*(
+	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/>.
+*/
+/**
+ * Some useful snippets for the optimiser.
+ */
+
+#include <libjulia/optimiser/Utilities.h>
+
+#include <libsolidity/inlineasm/AsmData.h>
+
+#include <libdevcore/CommonData.h>
+
+#include <boost/range/algorithm_ext/erase.hpp>
+
+using namespace std;
+using namespace dev;
+using namespace dev::julia;
+
+void dev::julia::removeEmptyBlocks(Block& _block)
+{
+	auto isEmptyBlock = [](Statement const& _st) -> bool {
+		return _st.type() == typeid(Block) && boost::get<Block>(_st).statements.empty();
+	};
+	boost::range::remove_erase_if(_block.statements, isEmptyBlock);
+}
diff --git a/libjulia/optimiser/Utilities.h b/libjulia/optimiser/Utilities.h
new file mode 100644
index 00000000..88ba3f47
--- /dev/null
+++ b/libjulia/optimiser/Utilities.h
@@ -0,0 +1,34 @@
+/*
+	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/>.
+*/
+/**
+ * Small useful snippets for the optimiser.
+ */
+
+#pragma once
+
+#include <libjulia/ASTDataForward.h>
+
+namespace dev
+{
+namespace julia
+{
+
+/// Removes statements that are just empty blocks (non-recursive).
+void removeEmptyBlocks(Block& _block);
+
+}
+}