Merge pull request #3278 from ethereum/ast_walker

Ast walker

4 files changed, 345 insertions, 0 deletions

diff --git a/libjulia/optimiser/ASTWalker.cpp b/libjulia/optimiser/ASTWalker.cpp
new file mode 100644
index 00000000..786afbe0
--- /dev/null
+++ b/libjulia/optimiser/ASTWalker.cpp
@@ -0,0 +1,149 @@
+/*
+	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/>.
+*/
+/**
+ * Generic AST walker.
+ */
+
+#include <libjulia/optimiser/ASTWalker.h>
+
+#include <libsolidity/inlineasm/AsmData.h>
+
+#include <libsolidity/interface/Exceptions.h>
+
+#include <boost/range/adaptor/reversed.hpp>
+
+using namespace std;
+using namespace dev;
+using namespace dev::julia;
+using namespace dev::solidity;
+
+
+void ASTWalker::operator()(FunctionalInstruction const& _instr)
+{
+	walkVector(_instr.arguments | boost::adaptors::reversed);
+}
+
+void ASTWalker::operator()(FunctionCall const& _funCall)
+{
+	walkVector(_funCall.arguments | boost::adaptors::reversed);
+}
+
+void ASTWalker::operator()(Assignment const& _assignment)
+{
+	for (auto const& name: _assignment.variableNames)
+		(*this)(name);
+	boost::apply_visitor(*this, *_assignment.value);
+}
+
+void ASTWalker::operator()(VariableDeclaration const& _varDecl)
+{
+	if (_varDecl.value)
+		boost::apply_visitor(*this, *_varDecl.value);
+}
+
+void ASTWalker::operator()(If const& _if)
+{
+	boost::apply_visitor(*this, *_if.condition);
+	(*this)(_if.body);
+}
+
+void ASTWalker::operator()(Switch const& _switch)
+{
+	boost::apply_visitor(*this, *_switch.expression);
+	for (auto const& _case: _switch.cases)
+	{
+		if (_case.value)
+			(*this)(*_case.value);
+		(*this)(_case.body);
+	}
+}
+
+void ASTWalker::operator()(FunctionDefinition const& _fun)
+{
+	(*this)(_fun.body);
+}
+
+void ASTWalker::operator()(ForLoop const& _for)
+{
+	(*this)(_for.pre);
+	boost::apply_visitor(*this, *_for.condition);
+	(*this)(_for.post);
+	(*this)(_for.body);
+}
+
+void ASTWalker::operator()(Block const& _block)
+{
+	walkVector(_block.statements);
+}
+
+void ASTModifier::operator()(FunctionalInstruction& _instr)
+{
+	walkVector(_instr.arguments | boost::adaptors::reversed);
+}
+
+void ASTModifier::operator()(FunctionCall& _funCall)
+{
+	walkVector(_funCall.arguments | boost::adaptors::reversed);
+}
+
+void ASTModifier::operator()(Assignment& _assignment)
+{
+	for (auto& name: _assignment.variableNames)
+		(*this)(name);
+	boost::apply_visitor(*this, *_assignment.value);
+}
+
+void ASTModifier::operator()(VariableDeclaration& _varDecl)
+{
+	if (_varDecl.value)
+		boost::apply_visitor(*this, *_varDecl.value);
+}
+
+void ASTModifier::operator()(If& _if)
+{
+	boost::apply_visitor(*this, *_if.condition);
+	(*this)(_if.body);
+}
+
+void ASTModifier::operator()(Switch& _switch)
+{
+	boost::apply_visitor(*this, *_switch.expression);
+	for (auto& _case: _switch.cases)
+	{
+		if (_case.value)
+			(*this)(*_case.value);
+		(*this)(_case.body);
+	}
+}
+
+void ASTModifier::operator()(FunctionDefinition& _fun)
+{
+	(*this)(_fun.body);
+}
+
+void ASTModifier::operator()(ForLoop& _for)
+{
+	(*this)(_for.pre);
+	boost::apply_visitor(*this, *_for.condition);
+	(*this)(_for.post);
+	(*this)(_for.body);
+}
+
+void ASTModifier::operator()(Block& _block)
+{
+	walkVector(_block.statements);
+}
diff --git a/libjulia/optimiser/ASTWalker.h b/libjulia/optimiser/ASTWalker.h
new file mode 100644
index 00000000..01499a50
--- /dev/null
+++ b/libjulia/optimiser/ASTWalker.h
@@ -0,0 +1,100 @@
+/*
+	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/>.
+*/
+/**
+ * Generic AST walker.
+ */
+
+#pragma once
+
+#include <libjulia/ASTDataForward.h>
+
+#include <libsolidity/interface/Exceptions.h>
+
+#include <boost/variant.hpp>
+#include <boost/optional.hpp>
+
+#include <vector>
+#include <set>
+#include <map>
+
+namespace dev
+{
+namespace julia
+{
+
+/**
+ * Generic AST walker.
+ */
+class ASTWalker: public boost::static_visitor<>
+{
+public:
+	virtual void operator()(Literal const&) {}
+	virtual void operator()(Instruction const&) { solAssert(false, ""); }
+	virtual void operator()(Identifier const&) {}
+	virtual void operator()(FunctionalInstruction const& _instr);
+	virtual void operator()(FunctionCall const& _funCall);
+	virtual void operator()(Label const&) { solAssert(false, ""); }
+	virtual void operator()(StackAssignment const&) { solAssert(false, ""); }
+	virtual void operator()(Assignment const& _assignment);
+	virtual void operator()(VariableDeclaration const& _varDecl);
+	virtual void operator()(If const& _if);
+	virtual void operator()(Switch const& _switch);
+	virtual void operator()(FunctionDefinition const&);
+	virtual void operator()(ForLoop const&);
+	virtual void operator()(Block const& _block);
+
+protected:
+	template <class T>
+	void walkVector(T const& _statements)
+	{
+		for (auto const& st: _statements)
+			boost::apply_visitor(*this, st);
+	}
+};
+
+/**
+ * Generic AST modifier (i.e. non-const version of ASTWalker).
+ */
+class ASTModifier: public boost::static_visitor<>
+{
+public:
+	virtual void operator()(Literal&) {}
+	virtual void operator()(Instruction&) { solAssert(false, ""); }
+	virtual void operator()(Identifier&) {}
+	virtual void operator()(FunctionalInstruction& _instr);
+	virtual void operator()(FunctionCall& _funCall);
+	virtual void operator()(Label&) { solAssert(false, ""); }
+	virtual void operator()(StackAssignment&) { solAssert(false, ""); }
+	virtual void operator()(Assignment& _assignment);
+	virtual void operator()(VariableDeclaration& _varDecl);
+	virtual void operator()(If& _if);
+	virtual void operator()(Switch& _switch);
+	virtual void operator()(FunctionDefinition&);
+	virtual void operator()(ForLoop&);
+	virtual void operator()(Block& _block);
+
+protected:
+	template <class T>
+	void walkVector(T&& _statements)
+	{
+		for (auto& st: _statements)
+			boost::apply_visitor(*this, st);
+	}
+};
+
+}
+}
diff --git a/libjulia/optimiser/NameCollector.cpp b/libjulia/optimiser/NameCollector.cpp
new file mode 100644
index 00000000..7b4c4793
--- /dev/null
+++ b/libjulia/optimiser/NameCollector.cpp
@@ -0,0 +1,44 @@
+/*
+	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/>.
+*/
+/**
+ * Specific AST walker that collects all defined names.
+ */
+
+#include <libjulia/optimiser/NameCollector.h>
+
+#include <libsolidity/inlineasm/AsmData.h>
+
+using namespace std;
+using namespace dev;
+using namespace dev::julia;
+
+void NameCollector::operator()(VariableDeclaration const& _varDecl)
+{
+	for (auto const& var: _varDecl.variables)
+		m_names.insert(var.name);
+}
+
+void NameCollector::operator ()(FunctionDefinition const& _funDef)
+{
+	m_names.insert(_funDef.name);
+	m_functions[_funDef.name] = &_funDef;
+	for (auto const arg: _funDef.parameters)
+		m_names.insert(arg.name);
+	for (auto const ret: _funDef.returnVariables)
+		m_names.insert(ret.name);
+	ASTWalker::operator ()(_funDef);
+}
diff --git a/libjulia/optimiser/NameCollector.h b/libjulia/optimiser/NameCollector.h
new file mode 100644
index 00000000..b7e38f46
--- /dev/null
+++ b/libjulia/optimiser/NameCollector.h
@@ -0,0 +1,52 @@
+/*
+	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/>.
+*/
+/**
+ * Specific AST walker that collects all defined names.
+ */
+
+#pragma once
+
+#include <libjulia/optimiser/ASTWalker.h>
+
+#include <string>
+#include <map>
+#include <set>
+
+namespace dev
+{
+namespace julia
+{
+
+/**
+ * Specific AST walker that collects all defined names.
+ */
+class NameCollector: public ASTWalker
+{
+public:
+	using ASTWalker::operator ();
+	virtual void operator()(VariableDeclaration const& _varDecl) override;
+	virtual void operator()(FunctionDefinition const& _funDef) override;
+
+	std::set<std::string> const& names() const { return m_names; }
+	std::map<std::string, FunctionDefinition const*> const& functions() const { return m_functions; }
+private:
+	std::set<std::string> m_names;
+	std::map<std::string, FunctionDefinition const*> m_functions;
+};
+
+}
+}