From cc4bd1f6af65106a96c8ca5394151fa4fbc7b497 Mon Sep 17 00:00:00 2001
From: Victor <annimon119@gmail.com>
Date: Fri, 9 Mar 2018 10:59:00 +0200
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
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---
 .../parser/optimization/ExpressionSimplification.java     | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/main/java/com/annimon/ownlang/parser/optimization/ExpressionSimplification.java b/src/main/java/com/annimon/ownlang/parser/optimization/ExpressionSimplification.java
index 7e0255e..cd1b042 100644
--- a/src/main/java/com/annimon/ownlang/parser/optimization/ExpressionSimplification.java
+++ b/src/main/java/com/annimon/ownlang/parser/optimization/ExpressionSimplification.java
@@ -117,6 +117,14 @@ public class ExpressionSimplification extends OptimizationVisitor<Void> implemen
             return new ValueExpression(0);
         }
 
+        // x >> 0 to x, x << 0 to x
+        if (isIntegerValue(s.expr2, 0) &&
+                (s.operation == BinaryExpression.Operator.LSHIFT ||
+                 s.operation == BinaryExpression.Operator.RSHIFT)) {
+            simplificationsCount++;
+            return s.expr1;
+        }
+
         return super.visit(s, t);
     }