From c8e201e520b874439f2525e6cfe02d387654b2c1 Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Tue, 4 Dec 2018 15:03:53 +0100
Subject: Provide Yul Object builtins.

---
 libyul/CMakeLists.txt |  1 +
 libyul/Dialect.cpp    | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++
 libyul/Dialect.h      |  1 +
 3 files changed, 78 insertions(+)
 create mode 100644 libyul/Dialect.cpp

(limited to 'libyul')

diff --git a/libyul/CMakeLists.txt b/libyul/CMakeLists.txt
index 7ed84ff5..e7383e4a 100644
--- a/libyul/CMakeLists.txt
+++ b/libyul/CMakeLists.txt
@@ -6,6 +6,7 @@ add_library(yul
 	AsmPrinter.cpp
 	AsmScope.cpp
 	AsmScopeFiller.cpp
+	Dialect.cpp
 	Object.cpp
 	ObjectParser.cpp
 	backends/evm/EVMAssembly.cpp
diff --git a/libyul/Dialect.cpp b/libyul/Dialect.cpp
new file mode 100644
index 00000000..99718787
--- /dev/null
+++ b/libyul/Dialect.cpp
@@ -0,0 +1,76 @@
+/*
+	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/>.
+*/
+/**
+ * Yul dialect.
+ */
+
+#include <libyul/Dialect.h>
+
+#include <map>
+
+using namespace yul;
+using namespace std;
+
+namespace
+{
+
+void addFunction(
+	map<YulString, BuiltinFunction>& _repository,
+	string const& _name,
+	size_t _params,
+	size_t _returns,
+	bool _movable
+)
+{
+	_repository[YulString{_name}] = BuiltinFunction{
+		YulString{_name},
+		vector<Type>(_params),
+		vector<Type>(_returns),
+		_movable
+	};
+}
+
+class GenericBuiltins: public Builtins
+{
+public:
+	GenericBuiltins(map<YulString, BuiltinFunction> const& _functions): m_functions(_functions) {}
+	BuiltinFunction const* query(YulString _name) const
+	{
+		auto it = m_functions.find(_name);
+		if (it != end(m_functions))
+			return &it->second;
+		else
+			return nullptr;
+	}
+private:
+	map<YulString, BuiltinFunction> const& m_functions;
+};
+
+}
+
+Dialect Dialect::strictAssemblyForEVMObjects()
+{
+	static map<YulString, BuiltinFunction> functions;
+	if (functions.empty())
+	{
+		addFunction(functions, "datasize", 1, 1, true);
+		addFunction(functions, "dataoffset", 1, 1, true);
+		addFunction(functions, "datacopy", 3, 0, false);
+	}
+	// The EVM instructions will be moved to builtins at some point.
+	return Dialect{AsmFlavour::Strict, std::make_shared<GenericBuiltins>(functions)};
+}
diff --git a/libyul/Dialect.h b/libyul/Dialect.h
index 3ea16014..b78f1aaf 100644
--- a/libyul/Dialect.h
+++ b/libyul/Dialect.h
@@ -72,6 +72,7 @@ struct Dialect
 		// The EVM instructions will be moved to builtins at some point.
 		return Dialect{AsmFlavour::Strict, std::make_shared<Builtins>()};
 	}
+	static Dialect strictAssemblyForEVMObjects();
 	static Dialect yul()
 	{
 		// Will have to add builtins later.
-- 
cgit