From cd35c2427a4a9e56f987ac4ef2625c001da67738 Mon Sep 17 00:00:00 2001
From: Sergey Andreenko <seandree@microsoft.com>
Date: Sun, 4 Mar 2018 01:10:12 -0800
Subject: [PATCH] fix legacy backend (#16741)

---
 src/jit/emitxarch.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/jit/emitxarch.cpp b/src/jit/emitxarch.cpp
index 0bd85f2..aabf69f 100644
--- a/src/jit/emitxarch.cpp
+++ b/src/jit/emitxarch.cpp
@@ -4044,11 +4044,13 @@ void emitter::emitIns_R_R_I(instruction ins, emitAttr attr, regNumber reg1, regN
         sz += emitGetRexPrefixSize(ins);
     }
 
+#ifndef LEGACY_BACKEND
     if ((ins == INS_pextrq || ins == INS_pinsrq) && !UseVEXEncoding())
     {
         assert(UseSSE4());
         sz += 1;
     }
+#endif // !LEGACY_BACKEND
 
     id->idIns(ins);
     id->idInsFmt(IF_RRW_RRW_CNS);
-- 
2.7.4