diff --git a/clang/include/clang/Basic/BuiltinsX86.def b/clang/include/clang/Basic/BuiltinsX86.def
index 71ae00736af5..7c72d4fd5c09 100644
--- a/clang/include/clang/Basic/BuiltinsX86.def
+++ b/clang/include/clang/Basic/BuiltinsX86.def
@@ -1301,7 +1301,6 @@ TARGET_BUILTIN(__builtin_ia32_cvtps2qq256_mask, "V4LLiV4fV4LLiUc", "ncV:256:", "
 TARGET_BUILTIN(__builtin_ia32_cvtps2uqq128_mask, "V2LLiV4fV2LLiUc", "ncV:128:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvtps2uqq256_mask, "V4LLiV4fV4LLiUc", "ncV:256:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvtqq2ps128_mask, "V4fV2LLiV4fUc", "ncV:128:", "avx512vl,avx512dq")
-TARGET_BUILTIN(__builtin_ia32_cvtqq2ps256_mask, "V4fV4LLiV4fUc", "ncV:256:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvttpd2qq128_mask, "V2LLiV2dV2LLiUc", "ncV:128:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvttpd2qq256_mask, "V4LLiV4dV4LLiUc", "ncV:256:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvttpd2uqq128_mask, "V2LLiV2dV2LLiUc", "ncV:128:", "avx512vl,avx512dq")
@@ -1311,7 +1310,6 @@ TARGET_BUILTIN(__builtin_ia32_cvttps2qq256_mask, "V4LLiV4fV4LLiUc", "ncV:256:",
 TARGET_BUILTIN(__builtin_ia32_cvttps2uqq128_mask, "V2LLiV4fV2LLiUc", "ncV:128:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvttps2uqq256_mask, "V4LLiV4fV4LLiUc", "ncV:256:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_cvtuqq2ps128_mask, "V4fV2LLiV4fUc", "ncV:128:", "avx512vl,avx512dq")
-TARGET_BUILTIN(__builtin_ia32_cvtuqq2ps256_mask, "V4fV4LLiV4fUc", "ncV:256:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_rangepd128_mask, "V2dV2dV2dIiV2dUc", "ncV:128:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_rangepd256_mask, "V4dV4dV4dIiV4dUc", "ncV:256:", "avx512vl,avx512dq")
 TARGET_BUILTIN(__builtin_ia32_rangeps128_mask, "V4fV4fV4fIiV4fUc", "ncV:128:", "avx512vl,avx512dq")
diff --git a/clang/lib/Headers/avx512vldqintrin.h b/clang/lib/Headers/avx512vldqintrin.h
index 9d13846e8964..4f68157c2814 100644
--- a/clang/lib/Headers/avx512vldqintrin.h
+++ b/clang/lib/Headers/avx512vldqintrin.h
@@ -523,23 +523,21 @@ _mm_maskz_cvtepi64_ps (__mmask8 __U, __m128i __A) {
 
 static __inline__ __m128 __DEFAULT_FN_ATTRS256
 _mm256_cvtepi64_ps (__m256i __A) {
-  return (__m128) __builtin_ia32_cvtqq2ps256_mask ((__v4di) __A,
-                (__v4sf) _mm_setzero_ps(),
-                (__mmask8) -1);
+  return (__m128)__builtin_convertvector((__v4di)__A, __v4sf);
 }
 
 static __inline__ __m128 __DEFAULT_FN_ATTRS256
 _mm256_mask_cvtepi64_ps (__m128 __W, __mmask8 __U, __m256i __A) {
-  return (__m128) __builtin_ia32_cvtqq2ps256_mask ((__v4di) __A,
-                (__v4sf) __W,
-                (__mmask8) __U);
+  return (__m128)__builtin_ia32_selectps_128((__mmask8)__U,
+                                             (__v4sf)_mm256_cvtepi64_ps(__A),
+                                             (__v4sf)__W);
 }
 
 static __inline__ __m128 __DEFAULT_FN_ATTRS256
 _mm256_maskz_cvtepi64_ps (__mmask8 __U, __m256i __A) {
-  return (__m128) __builtin_ia32_cvtqq2ps256_mask ((__v4di) __A,
-                (__v4sf) _mm_setzero_ps(),
-                (__mmask8) __U);
+  return (__m128)__builtin_ia32_selectps_128((__mmask8)__U,
+                                             (__v4sf)_mm256_cvtepi64_ps(__A),
+                                             (__v4sf)_mm_setzero_ps());
 }
 
 static __inline__ __m128i __DEFAULT_FN_ATTRS128
@@ -771,23 +769,21 @@ _mm_maskz_cvtepu64_ps (__mmask8 __U, __m128i __A) {
 
 static __inline__ __m128 __DEFAULT_FN_ATTRS256
 _mm256_cvtepu64_ps (__m256i __A) {
-  return (__m128) __builtin_ia32_cvtuqq2ps256_mask ((__v4di) __A,
-                (__v4sf) _mm_setzero_ps(),
-                (__mmask8) -1);
+  return (__m128)__builtin_convertvector((__v4du)__A, __v4sf);
 }
 
 static __inline__ __m128 __DEFAULT_FN_ATTRS256
 _mm256_mask_cvtepu64_ps (__m128 __W, __mmask8 __U, __m256i __A) {
-  return (__m128) __builtin_ia32_cvtuqq2ps256_mask ((__v4di) __A,
-                (__v4sf) __W,
-                (__mmask8) __U);
+  return (__m128)__builtin_ia32_selectps_128((__mmask8)__U,
+                                             (__v4sf)_mm256_cvtepu64_ps(__A),
+                                             (__v4sf)__W);
 }
 
 static __inline__ __m128 __DEFAULT_FN_ATTRS256
 _mm256_maskz_cvtepu64_ps (__mmask8 __U, __m256i __A) {
-  return (__m128) __builtin_ia32_cvtuqq2ps256_mask ((__v4di) __A,
-                (__v4sf) _mm_setzero_ps(),
-                (__mmask8) __U);
+  return (__m128)__builtin_ia32_selectps_128((__mmask8)__U,
+                                             (__v4sf)_mm256_cvtepu64_ps(__A),
+                                             (__v4sf)_mm_setzero_ps());
 }
 
 #define _mm_range_pd(A, B, C) \
diff --git a/clang/test/CodeGen/avx512vldq-builtins.c b/clang/test/CodeGen/avx512vldq-builtins.c
index b21b665eb9be..8bb209862fe8 100644
--- a/clang/test/CodeGen/avx512vldq-builtins.c
+++ b/clang/test/CodeGen/avx512vldq-builtins.c
@@ -479,19 +479,21 @@ __m128 test_mm_maskz_cvtepi64_ps(__mmask8 __U, __m128i __A) {
 
 __m128 test_mm256_cvtepi64_ps(__m256i __A) {
   // CHECK-LABEL: @test_mm256_cvtepi64_ps
-  // CHECK: @llvm.x86.avx512.mask.cvtqq2ps.256
+  // CHECK: sitofp <4 x i64> %{{.*}} to <4 x float>
   return _mm256_cvtepi64_ps(__A); 
 }
 
 __m128 test_mm256_mask_cvtepi64_ps(__m128 __W, __mmask8 __U, __m256i __A) {
   // CHECK-LABEL: @test_mm256_mask_cvtepi64_ps
-  // CHECK: @llvm.x86.avx512.mask.cvtqq2ps.256
+  // CHECK: sitofp <4 x i64> %{{.*}} to <4 x float>
+  // select <4 x i1> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}
   return _mm256_mask_cvtepi64_ps(__W, __U, __A); 
 }
 
 __m128 test_mm256_maskz_cvtepi64_ps(__mmask8 __U, __m256i __A) {
   // CHECK-LABEL: @test_mm256_maskz_cvtepi64_ps
-  // CHECK: @llvm.x86.avx512.mask.cvtqq2ps.256
+  // CHECK: sitofp <4 x i64> %{{.*}} to <4 x float>
+  // select <4 x i1> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}
   return _mm256_maskz_cvtepi64_ps(__U, __A); 
 }
 
@@ -699,19 +701,21 @@ __m128 test_mm_maskz_cvtepu64_ps(__mmask8 __U, __m128i __A) {
 
 __m128 test_mm256_cvtepu64_ps(__m256i __A) {
   // CHECK-LABEL: @test_mm256_cvtepu64_ps
-  // CHECK: @llvm.x86.avx512.mask.cvtuqq2ps.256
+  // CHECK: uitofp <4 x i64> %{{.*}} to <4 x float>
   return _mm256_cvtepu64_ps(__A); 
 }
 
 __m128 test_mm256_mask_cvtepu64_ps(__m128 __W, __mmask8 __U, __m256i __A) {
   // CHECK-LABEL: @test_mm256_mask_cvtepu64_ps
-  // CHECK: @llvm.x86.avx512.mask.cvtuqq2ps.256
+  // CHECK: uitofp <4 x i64> %{{.*}} to <4 x float>
+  // CHECK: select <4 x i1> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}
   return _mm256_mask_cvtepu64_ps(__W, __U, __A); 
 }
 
 __m128 test_mm256_maskz_cvtepu64_ps(__mmask8 __U, __m256i __A) {
   // CHECK-LABEL: @test_mm256_maskz_cvtepu64_ps
-  // CHECK: @llvm.x86.avx512.mask.cvtuqq2ps.256
+  // CHECK: uitofp <4 x i64> %{{.*}} to <4 x float>
+  // CHECK: select <4 x i1> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}
   return _mm256_maskz_cvtepu64_ps(__U, __A); 
 }