From 75f02ee771bae2d6682f873895cd003bac60ba7e Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Mon, 22 Dec 2008 22:16:31 +0000
Subject: [PATCH] Simplification: Negate the operator== method instead of
 implementing a full operator!= method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61352 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/GVN.cpp | 25 +------------------------
 1 file changed, 1 insertion(+), 24 deletions(-)

diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp
index e517b3a5295..aca49ba3c09 100644
--- a/lib/Transforms/Scalar/GVN.cpp
+++ b/lib/Transforms/Scalar/GVN.cpp
@@ -110,30 +110,7 @@ namespace {
     }
   
     bool operator!=(const Expression &other) const {
-      if (opcode != other.opcode)
-        return true;
-      else if (opcode == EMPTY || opcode == TOMBSTONE)
-        return false;
-      else if (type != other.type)
-        return true;
-      else if (function != other.function)
-        return true;
-      else if (firstVN != other.firstVN)
-        return true;
-      else if (secondVN != other.secondVN)
-        return true;
-      else if (thirdVN != other.thirdVN)
-        return true;
-      else {
-        if (varargs.size() != other.varargs.size())
-          return true;
-      
-        for (size_t i = 0; i < varargs.size(); ++i)
-          if (varargs[i] != other.varargs[i])
-            return true;
-    
-          return false;
-      }
+      return !(*this == other);
     }
   };