From 524df9d3368e4d3343b98db65ccbde4b3fab2fcb Mon Sep 17 00:00:00 2001
From: Siegfried Pammer <siegfriedpammer@gmail.com>
Date: Sun, 27 Aug 2017 16:04:36 +0200
Subject: [PATCH] Add ILVariableEqualityComparer

---
 ICSharpCode.Decompiler/IL/ILVariable.cs | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/ICSharpCode.Decompiler/IL/ILVariable.cs b/ICSharpCode.Decompiler/IL/ILVariable.cs
index 2861242ca..a6951bcde 100644
--- a/ICSharpCode.Decompiler/IL/ILVariable.cs
+++ b/ICSharpCode.Decompiler/IL/ILVariable.cs
@@ -339,4 +339,23 @@ namespace ICSharpCode.Decompiler.IL
 	{
 		int IndexInAddressInstructionList { get; set; }
 	}
+
+	public class ILVariableEqualityComparer : IEqualityComparer<ILVariable>
+	{
+		public static readonly ILVariableEqualityComparer Instance = new ILVariableEqualityComparer();
+
+		public bool Equals(ILVariable x, ILVariable y)
+		{
+			if (x == y)
+				return true;
+			if (x == null || y == null)
+				return false;
+			return x.Function == y.Function && x.Kind == y.Kind && x.Index == y.Index;
+		}
+
+		public int GetHashCode(ILVariable obj)
+		{
+			return (obj.Function, obj.Kind, obj.Index).GetHashCode();
+		}
+	}
 }