diff --git a/clang/test/CodeGen/avx512-kconstraints-att_inline_asm.c b/clang/test/CodeGen/avx512-kconstraints-att_inline_asm.c
index cf9524c1a7bd..df93ddf7bbb9 100644
--- a/clang/test/CodeGen/avx512-kconstraints-att_inline_asm.c
+++ b/clang/test/CodeGen/avx512-kconstraints-att_inline_asm.c
@@ -1,58 +1,58 @@
-// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin -target-cpu skylake-avx512 -O0  -emit-llvm -S -o - -Wall -Werror | FileCheck %s
+// RUN: %clang_cc1 %s -O0 -triple=x86_64-apple-darwin -target-cpu skylake-avx512 -emit-llvm -o - -Wall -Werror |opt -instnamer -S |FileCheck %s
 // This test checks validity of att\gcc style inline assmebly for avx512 k and Yk constraints.
 // Also checks mask register allows flexible type (size <= 64 bit)
 
 void mask_Yk_i8(char msk){ 
-//CHECK: vpaddb %xmm1, %xmm0, %xmm1 {%k1}
+//CHECK: vpaddb\09 %xmm1, %xmm0, %xmm1 {$0}\09
  asm ("vpaddb\t %%xmm1, %%xmm0, %%xmm1 %{%0%}\t"
        :                //output
        : "Yk" (msk));   //inputs
 }
 
 void mask_Yk_i16(short msk){
-//CHECK: vpaddb %xmm1, %xmm0, %xmm1 {%k1}
+//CHECK: vpaddb\09 %xmm1, %xmm0, %xmm1 {$0}\09
  asm ("vpaddb\t %%xmm1, %%xmm0, %%xmm1 %{%0%}\t"
        :                //output
        :  "Yk" (msk));  //inputs
 }
 
 void mask_Yk_i32(int msk){
-//CHECK: vpaddb %xmm1, %xmm0, %xmm1 {%k1}
+//CHECK: vpaddb\09 %xmm1, %xmm0, %xmm1 {$0}\09
     asm ("vpaddb\t %%xmm1, %%xmm0, %%xmm1 %{%0%}\t"
        :                //output
        :  "Yk" (msk));   //inputs
 }
 
 void mask_Yk_i64(long long msk){
-//CHECK: vpaddb %xmm1, %xmm0, %xmm1 {%k1}
+//CHECK: vpaddb\09 %xmm1, %xmm0, %xmm1 {$0}\09
  asm ("vpaddb\t %%xmm1, %%xmm0, %%xmm1 %{%0%}\t"
        :                //output
        :  "Yk" (msk));   //inputs
 }
 
 void k_wise_op_i8(char msk_dst,char msk_src1,char msk_src2){
-//CHECK: kandw %k1, %k0, %k0
+//CHECK: kandw\09$2, $1, $0
  asm ("kandw\t%2, %1, %0"
        : "=k" (msk_dst)
        : "k" (msk_src1), "k" (msk_src2));
 }
 
 void k_wise_op_i16(short msk_dst, short msk_src1, short msk_src2){
-//CHECK: kandw %k1, %k0, %k0
+//CHECK: kandw\09$2, $1, $0
   asm ("kandw\t%2, %1, %0"
        : "=k" (msk_dst)
        : "k" (msk_src1), "k" (msk_src2));
 }
 
 void k_wise_op_i32(int msk_dst, int msk_src1, int msk_src2){
-//CHECK: kandw %k1, %k0, %k0
+//CHECK: kandw\09$2, $1, $0
   asm ("kandw\t%2, %1, %0"
        : "=k" (msk_dst)
        : "k" (msk_src1), "k" (msk_src2));
 }
 
 void k_wise_op_i64(long long msk_dst, long long msk_src1, long long msk_src2){
-//CHECK: kandw %k1, %k0, %k0
+//CHECK: kandw\09$2, $1, $0
   asm ("kandw\t%2, %1, %0"
        : "=k" (msk_dst)
        : "k" (msk_src1), "k" (msk_src2));