In gmcs:

	Fix #78324
	* expression.cs (Binary.DoResolve): Use	Nullable.LiftedBinaryOperator
	also when one of the operands is a null literal.
	* generic.cs (Nullable.LiftedBinaryOperator.EmitEquality): Rewrite
	to improve clarity, and generate slightly better code.

In tests:
	* gtest-211.cs: Add a couple more tests for better coverage.

svn path=/trunk/mcs/; revision=61104

1 files changed, 7 insertions, 0 deletions

diff --git a/mcs/tests/gtest-211.cs b/mcs/tests/gtest-211.cs
index 61182313474..3ab516ede8d 100644
--- a/mcs/tests/gtest-211.cs
+++ b/mcs/tests/gtest-211.cs
@@ -6,17 +6,24 @@ class MyTest {
 	}
 	public static void Main()
 	{
+		int? w = null;
 		int? x = null;
 		int? y = 0;
+		int? z = 1;
+
 		f (false, x == 0);
 		f (true,  x != 0);
 		f (false, x == y);
 		f (true,  x != y);
+		f (true,  x == w);
+		f (false, x != w);
 		f (true,  x == null);
 		f (false, x != null);
 
 		f (true,  0 == y);
 		f (false, 0 != y);
+		f (false, z == y);
+		f (true,  z != y);
 		f (false, null == y);
 		f (true,  null != y);
 	}