1 files changed, 103 insertions, 0 deletions
diff --git a/libsolidity/inlineasm/AsmAnalysis.h b/libsolidity/inlineasm/AsmAnalysis.h
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+++ b/libsolidity/inlineasm/AsmAnalysis.h
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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/>.
+*/
+/**
+ * Analysis part of inline assembly.
+ */
+
+#pragma once
+
+#include <libsolidity/interface/Exceptions.h>
+
+#include <libsolidity/inlineasm/AsmScope.h>
+
+#include <libjulia/backends/evm/AbstractAssembly.h>
+
+#include <libsolidity/inlineasm/AsmDataForward.h>
+
+#include <boost/variant.hpp>
+
+#include <functional>
+#include <memory>
+
+namespace dev
+{
+namespace solidity
+{
+class ErrorReporter;
+namespace assembly
+{
+
+struct AsmAnalysisInfo;
+
+/**
+ * Performs the full analysis stage, calls the ScopeFiller internally, then resolves
+ * references and performs other checks.
+ * If all these checks pass, code generation should not throw errors.
+ */
+class AsmAnalyzer: public boost::static_visitor<bool>
+{
+public:
+	explicit AsmAnalyzer(
+		AsmAnalysisInfo& _analysisInfo,
+		ErrorReporter& _errorReporter,
+		bool _julia = false,
+		julia::ExternalIdentifierAccess::Resolver const& _resolver = julia::ExternalIdentifierAccess::Resolver()
+	): m_resolver(_resolver), m_info(_analysisInfo), m_errorReporter(_errorReporter), m_julia(_julia) {}
+
+	bool analyze(assembly::Block const& _block);
+
+	bool operator()(assembly::Instruction const&);
+	bool operator()(assembly::Literal const& _literal);
+	bool operator()(assembly::Identifier const&);
+	bool operator()(assembly::FunctionalInstruction const& _functionalInstruction);
+	bool operator()(assembly::Label const& _label);
+	bool operator()(assembly::StackAssignment const&);
+	bool operator()(assembly::Assignment const& _assignment);
+	bool operator()(assembly::VariableDeclaration const& _variableDeclaration);
+	bool operator()(assembly::FunctionDefinition const& _functionDefinition);
+	bool operator()(assembly::FunctionCall const& _functionCall);
+	bool operator()(assembly::Switch const& _switch);
+	bool operator()(assembly::ForLoop const& _forLoop);
+	bool operator()(assembly::Block const& _block);
+
+private:
+	/// Visits the statement and expects it to deposit one item onto the stack.
+	bool expectExpression(Statement const& _statement);
+	bool expectDeposit(int _deposit, int _oldHeight, SourceLocation const& _location);
+
+	/// Verifies that a variable to be assigned to exists and has the same size
+	/// as the value, @a _valueSize, unless that is equal to -1.
+	bool checkAssignment(assembly::Identifier const& _assignment, size_t _valueSize = size_t(-1));
+
+	Scope& scope(assembly::Block const* _block);
+	void expectValidType(std::string const& type, SourceLocation const& _location);
+	void warnOnInstructions(solidity::Instruction _instr, SourceLocation const& _location);
+
+	int m_stackHeight = 0;
+	julia::ExternalIdentifierAccess::Resolver m_resolver;
+	Scope* m_currentScope = nullptr;
+	/// Variables that are active at the current point in assembly (as opposed to
+	/// "part of the scope but not yet declared")
+	std::set<Scope::Variable const*> m_activeVariables;
+	AsmAnalysisInfo& m_info;
+	ErrorReporter& m_errorReporter;
+	bool m_julia = false;
+};
+
+}
+}
+}