Merge pull request #3331 from ethereum/instruction_mover

Function Grouper

2 files changed, 95 insertions, 0 deletions

diff --git a/libjulia/optimiser/FunctionGrouper.cpp b/libjulia/optimiser/FunctionGrouper.cpp
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+++ b/libjulia/optimiser/FunctionGrouper.cpp
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+/*
+	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 of a block so that all non-function definition
+ * statements are moved to a block of their own followed by all function definitions.
+ */
+
+#include <libjulia/optimiser/FunctionGrouper.h>
+
+#include <libsolidity/inlineasm/AsmData.h>
+
+#include <libsolidity/interface/Exceptions.h>
+
+#include <boost/range/algorithm_ext/erase.hpp>
+
+using namespace std;
+using namespace dev;
+using namespace dev::julia;
+using namespace dev::solidity;
+
+
+void FunctionGrouper::operator()(Block& _block)
+{
+	vector<Statement> reordered;
+	reordered.emplace_back(Block{_block.location, {}});
+
+	for (auto&& statement: _block.statements)
+	{
+		if (statement.type() == typeid(FunctionDefinition))
+			reordered.emplace_back(std::move(statement));
+		else
+			boost::get<Block>(reordered.front()).statements.emplace_back(std::move(statement));
+	}
+	_block.statements = std::move(reordered);
+}
diff --git a/libjulia/optimiser/FunctionGrouper.h b/libjulia/optimiser/FunctionGrouper.h
new file mode 100644
index 00000000..64a71318
--- /dev/null
+++ b/libjulia/optimiser/FunctionGrouper.h
@@ -0,0 +1,46 @@
+/*
+	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 of a black so that all non-function definition
+ * instructions are moved to a block of their own followed by all function definitions.
+ */
+
+#pragma once
+
+#include <libjulia/ASTDataForward.h>
+
+namespace dev
+{
+namespace julia
+{
+
+/**
+ * Moves all instructions in a block into a new block at the start of the block, followed by
+ * all function definitions.
+ *
+ * After this step, a block is of the form
+ * { { I...} F... }
+ * Where I are (non-function-definition) instructions and F are function definitions.
+ */
+class FunctionGrouper
+{
+public:
+	void operator()(Block& _block);
+};
+
+}
+}