diff --git a/test/CodeGen/X86/slow-pmulld.ll b/test/CodeGen/X86/slow-pmulld.ll
index b12b7432991..1dec2c8b227 100644
--- a/test/CodeGen/X86/slow-pmulld.ll
+++ b/test/CodeGen/X86/slow-pmulld.ll
@@ -9,6 +9,8 @@
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512dq | FileCheck %s --check-prefixes=AVX-64,AVX512-64,AVX512DQ-64
 ; RUN: llc < %s -mtriple=i386-unknown-unknown -mattr=+avx512bw | FileCheck %s --check-prefixes=AVX-32,AVX512-32,AVX512BW-32
 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx512bw | FileCheck %s --check-prefixes=AVX-64,AVX512-64,AVX512BW-64
+; RUN: llc < %s -mtriple=i386-unknown-unknown -mcpu=knl | FileCheck %s --check-prefixes=AVX-32,AVX512-32,KNL-32
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mcpu=knl | FileCheck %s --check-prefixes=AVX-64,AVX512-64,KNL-64
 
 ; Make sure that the slow-pmulld feature can be used without SSE4.1.
 ; RUN: llc < %s -mtriple=i386-unknown-unknown -mcpu=silvermont -mattr=-sse4.1