From 647d306c967fd1dd2971f46557e718ed5c550a2f Mon Sep 17 00:00:00 2001
From: aravind <aravind@fb.com>
Date: Mon, 18 Mar 2013 16:10:33 -0700
Subject: [PATCH] Don't simplify Same to Eq to arrays

---
 hphp/runtime/vm/translator/hopt/simplifier.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hphp/runtime/vm/translator/hopt/simplifier.cpp b/hphp/runtime/vm/translator/hopt/simplifier.cpp
index 999d5a706..c29b5e222 100644
--- a/hphp/runtime/vm/translator/hopt/simplifier.cpp
+++ b/hphp/runtime/vm/translator/hopt/simplifier.cpp
@@ -766,6 +766,10 @@ SSATmp* Simplifier::simplifyCmp(Opcode opName, SSATmp* src1, SSATmp* src2) {
     if (src1->getType() == Type::Obj && src2->getType() == Type::Obj) {
       return nullptr;
     }
+    // for arrays, don't simplify Same to Eq
+    if (src1->getType() == Type::Arr && src2->getType() == Type::Arr) {
+      return nullptr;
+    }
     // Type is neither a string nor an object - simplify to OpEq/OpNeq
     if (opName == OpSame) {
       return m_tb->genCmp(OpEq, src1, src2);