Merge pull request #6578 from ethereum/fix_base_overload

Fix call to base class overloaded functions

test/libsolidity/semanticTests/functionCall/base_base_overload.sol

@@ -0,0 +1,50 @@
+contract BaseBase {
+	uint public x;
+	uint public y;
+	function init(uint a, uint b) public {
+		x = b;
+		y = a;
+	}
+	function init(uint a) public {
+		x = a + 1;
+	}
+}
+
+contract Base is BaseBase {
+	function init(uint a, uint b) public {
+		x = a;
+		y = b;
+	}
+	function init(uint a) public {
+		x = a;
+	}
+}
+
+contract Child is Base {
+	function cInit(uint c) public {
+		Base.init(c);
+	}
+	function cInit(uint c, uint d) public {
+		Base.init(c, d);
+	}
+	function bInit(uint c) public {
+		BaseBase.init(c);
+	}
+	function bInit(uint c, uint d) public {
+		BaseBase.init(c, d);
+	}
+}
+// ----
+// x() -> 0
+// y() -> 0
+// cInit(uint256): 2 ->
+// x() -> 2
+// y() -> 0
+// cInit(uint256,uint256): 3, 3 ->
+// x() -> 3
+// y() -> 3
+// bInit(uint256): 4 ->
+// x() -> 5
+// bInit(uint256,uint256): 9, 10 ->
+// x() -> 10
+// y() -> 9

test/libsolidity/semanticTests/functionCall/base_overload.sol

@@ -0,0 +1,29 @@
+contract Base {
+	uint public x;
+	uint public y;
+	function init(uint a, uint b) public {
+		x = a;
+		y = b;
+	}
+	function init(uint a) public {
+		x = a;
+	}
+}
+
+contract Child is Base {
+	function cInit(uint c) public {
+		Base.init(c);
+	}
+	function cInit(uint c, uint d) public {
+		Base.init(c, d);
+	}
+}
+// ----
+// x() -> 0
+// y() -> 0
+// cInit(uint256): 2 ->
+// x() -> 2
+// y() -> 0
+// cInit(uint256,uint256): 3, 3 ->
+// x() -> 3
+// y() -> 3