Index: include/clang/Basic/BuiltinsX86.def
===================================================================
--- include/clang/Basic/BuiltinsX86.def
+++ include/clang/Basic/BuiltinsX86.def
@@ -1749,6 +1749,10 @@
 TARGET_BUILTIN(__builtin_ia32_vpermt2varqi256_maskz, "V32cV32cV32cV32cUi","","avx512vbmi,avx512vl")
 TARGET_BUILTIN(__builtin_ia32_vcomisd, "iV2dV2dIiIi","","avx512f")
 TARGET_BUILTIN(__builtin_ia32_vcomiss, "iV4fV4fIiIi","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_storeapd128_mask, "vV2d*V2dUc","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_storeapd256_mask, "vV4d*V4dUc","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_storeaps128_mask, "vV4f*V4fUc","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_storeaps256_mask, "vV8f*V8fUc","","avx512f")
 
 #undef BUILTIN
 #undef TARGET_BUILTIN
Index: lib/Headers/avx512vlintrin.h
===================================================================
--- lib/Headers/avx512vlintrin.h
+++ lib/Headers/avx512vlintrin.h
@@ -6068,6 +6068,40 @@
                  _mm256_setzero_si256 (),
                  __M);
 }
+
+static __inline__ void __DEFAULT_FN_ATTRS
+_mm_mask_store_pd (void *__P, __mmask8 __U, __m128d __A)
+{
+  __builtin_ia32_storeapd128_mask ((__v2df *) __P,
+           (__v2df) __A,
+           (__mmask8) __U);
+}
+
+static __inline__ void __DEFAULT_FN_ATTRS
+_mm256_mask_store_pd (void *__P, __mmask8 __U, __m256d __A)
+{
+  __builtin_ia32_storeapd256_mask ((__v4df *) __P,
+           (__v4df) __A,
+           (__mmask8) __U);
+}
+
+static __inline__ void __DEFAULT_FN_ATTRS
+_mm_mask_store_ps (void *__P, __mmask8 __U, __m128 __A)
+{
+  __builtin_ia32_storeaps128_mask ((__v4sf *) __P,
+           (__v4sf) __A,
+           (__mmask8) __U);
+}
+
+static __inline__ void __DEFAULT_FN_ATTRS
+_mm256_mask_store_ps (void *__P, __mmask8 __U, __m256 __A)
+{
+  __builtin_ia32_storeaps256_mask ((__v8sf *) __P,
+           (__v8sf) __A,
+           (__mmask8) __U);
+}
+
+
 #undef __DEFAULT_FN_ATTRS
 #undef __DEFAULT_FN_ATTRS_BOTH
 
Index: test/CodeGen/avx512vl-builtins.c
===================================================================
--- test/CodeGen/avx512vl-builtins.c
+++ test/CodeGen/avx512vl-builtins.c
@@ -4080,3 +4080,27 @@
   return _mm256_maskz_set1_epi64(__M, __A); 
 }
 
+void test_mm_mask_store_pd(void *__P, __mmask8 __U, __m128d __A) {
+  // CHECK-LABEL: @test_mm_mask_store_pd
+  // CHECK: @llvm.x86.avx512.mask.store.pd.128
+  return _mm_mask_store_pd(__P, __U, __A); 
+}
+
+void test_mm256_mask_store_pd(void *__P, __mmask8 __U, __m256d __A) {
+  // CHECK-LABEL: @test_mm256_mask_store_pd
+  // CHECK: @llvm.x86.avx512.mask.store.pd.256
+  return _mm256_mask_store_pd(__P, __U, __A); 
+}
+
+void test_mm_mask_store_ps(void *__P, __mmask8 __U, __m128 __A) {
+  // CHECK-LABEL: @test_mm_mask_store_ps
+  // CHECK: @llvm.x86.avx512.mask.store.ps.128
+  return _mm_mask_store_ps(__P, __U, __A); 
+}
+
+void test_mm256_mask_store_ps(void *__P, __mmask8 __U, __m256 __A) {
+  // CHECK-LABEL: @test_mm256_mask_store_ps
+  // CHECK: @llvm.x86.avx512.mask.store.ps.256
+  return _mm256_mask_store_ps(__P, __U, __A); 
+}
+