Mono.CSharp.For.DoEmit C# (CSharp) Method

		protected override void DoEmit (EmitContext ec)
		{
			if (InitStatement != null)
				InitStatement.Emit (ec);

			if (empty) {
				Test.EmitSideEffect (ec);
				return;
			}

			Label old_begin = ec.LoopBegin;
			Label old_end = ec.LoopEnd;
			Label loop = ec.DefineLabel ();
			Label test = ec.DefineLabel ();

			ec.LoopBegin = ec.DefineLabel ();
			ec.LoopEnd = ec.DefineLabel ();

			ec.Emit (OpCodes.Br, test);
			ec.MarkLabel (loop);
			Statement.Emit (ec);

			ec.MarkLabel (ec.LoopBegin);
			Increment.Emit (ec);

			ec.MarkLabel (test);
			//
			// If test is null, there is no test, and we are just
			// an infinite loop
			//
			if (Test != null){
				//
				// The Resolve code already catches the case for
				// Test == Constant (false) so we know that
				// this is true
				//
				if (Test is Constant) {
					Test.EmitSideEffect (ec);
					ec.Emit (OpCodes.Br, loop);
				} else {
					Test.EmitBranchable (ec, loop, true);
				}
				
			} else
				ec.Emit (OpCodes.Br, loop);
			ec.MarkLabel (ec.LoopEnd);

			ec.LoopBegin = old_begin;
			ec.LoopEnd = old_end;
		}