tmp

libyul/CMakeLists.txt

@@ -71,6 +71,8 @@ add_library(yul
 	backends/evm/EVMObjectCompiler.h
 	backends/evm/EVMMetrics.cpp
 	backends/evm/EVMMetrics.h
+	backends/evm/DirectStackLayoutGenerator.cpp
+	backends/evm/DirectStackLayoutGenerator.h
 	backends/evm/NoOutputAssembly.h
 	backends/evm/NoOutputAssembly.cpp
 	backends/evm/OptimizedEVMCodeTransform.cpp

libyul/backends/evm/DirectStackLayoutGenerator.cpp

@@ -0,0 +1,84 @@
+/*
+	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/>.
+*/
+// SPDX-License-Identifier: GPL-3.0
+/**
+ * Stack layout generator for Yul to EVM code generation.
+ */
+
+#include <libyul/backends/evm/DirectStackLayoutGenerator.h>
+
+#include <libyul/AST.h>
+
+#include <range/v3/view/drop_exactly.hpp>
+#include <range/v3/view/reverse.hpp>
+
+using namespace solidity;
+using namespace solidity::yul;
+using namespace std;
+
+void DirectStackLayoutGenerator::run(Block const& _block)
+{
+	yulAssert(_block.statements.size() > 0, "");
+	yulAssert(holds_alternative<Block>(_block.statements.front()), "");
+
+	{
+		DirectStackLayoutGenerator generator;
+		generator(get<Block>(_block.statements.front()));
+	}
+	for (Statement const& statement: _block.statements | ranges::views::drop_exactly(1))
+	{
+		FunctionDefinition const* functionDefinition = get_if<FunctionDefinition>(&statement);
+		yulAssert(functionDefinition, "");
+		DirectStackLayoutGenerator generator;
+		generator(*functionDefinition);
+	}
+}
+
+void DirectStackLayoutGenerator::operator()(Block const& _block)
+{
+	for (Statement const& statement: _block.statements | ranges::views::reverse)
+		visit(statement);
+}
+
+void DirectStackLayoutGenerator::operator()(VariableDeclaration const& _variableDeclaration)
+{
+
+}
+
+void DirectStackLayoutGenerator::operator()(Assignment const& _assignment)
+{
+
+}
+
+void DirectStackLayoutGenerator::operator()(ExpressionStatement const& _expressionStatement)
+{
+
+}
+
+void DirectStackLayoutGenerator::operator()(If const& _if)
+{
+}
+void DirectStackLayoutGenerator::operator()(Switch const& _switch)
+{
+}
+void DirectStackLayoutGenerator::operator()(ForLoop const& _forLoop)
+{
+}
+
+void DirectStackLayoutGenerator::operator()(FunctionDefinition const& _functionDefinition)
+{
+}

libyul/backends/evm/DirectStackLayoutGenerator.h

@@ -0,0 +1,67 @@
+/*
+	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/>.
+*/
+// SPDX-License-Identifier: GPL-3.0
+/**
+ * Stack layout generator for Yul to EVM code generation.
+ */
+
+#pragma once
+
+#include <libyul/backends/evm/ControlFlowGraph.h>
+
+#include <libyul/optimiser/ASTWalker.h>
+
+namespace solidity::yul
+{
+
+struct StackLayout
+{
+	struct StackInfo
+	{
+		Stack entry;
+		Stack exit;
+	};
+	std::map<Block const*, StackInfo> blockInfos;
+	std::map<Statement const*, StackInfo> statementInfos;
+};
+
+class DirectStackLayoutGenerator: public ASTWalker
+{
+public:
+	static void run(Block const& _ast);
+
+	virtual void operator()(Literal const&) {}
+	virtual void operator()(Identifier const&) {}
+	virtual void operator()(FunctionCall const& _funCall);
+	virtual void operator()(ExpressionStatement const& _statement);
+	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()(ForLoop const&);
+	virtual void operator()(FunctionDefinition const&);
+	virtual void operator()(Break const&);
+	virtual void operator()(Continue const&);
+	virtual void operator()(Leave const&);
+	virtual void operator()(Block const& _block);
+
+private:
+	DirectStackLayoutGenerator() {}
+	Stack m_stack;
+};
+
+}