diff --git a/clang/lib/Headers/avx512bwintrin.h b/clang/lib/Headers/avx512bwintrin.h
index eabe215947761..8953c55226718 100644
--- a/clang/lib/Headers/avx512bwintrin.h
+++ b/clang/lib/Headers/avx512bwintrin.h
@@ -465,17 +465,15 @@ _mm512_maskz_mullo_epi16(__mmask32 __U, __m512i __A, __m512i __B) {
                                              (__v32hi)_mm512_setzero_si512());
 }
 
-static __inline__ __m512i __DEFAULT_FN_ATTRS512
-_mm512_mask_blend_epi8 (__mmask64 __U, __m512i __A, __m512i __W)
-{
+static __inline__ __m512i __DEFAULT_FN_ATTRS512_CONSTEXPR
+_mm512_mask_blend_epi8(__mmask64 __U, __m512i __A, __m512i __W) {
   return (__m512i) __builtin_ia32_selectb_512 ((__mmask64) __U,
               (__v64qi) __W,
               (__v64qi) __A);
 }
 
-static __inline__ __m512i __DEFAULT_FN_ATTRS512
-_mm512_mask_blend_epi16 (__mmask32 __U, __m512i __A, __m512i __W)
-{
+static __inline__ __m512i __DEFAULT_FN_ATTRS512_CONSTEXPR
+_mm512_mask_blend_epi16(__mmask32 __U, __m512i __A, __m512i __W) {
   return (__m512i) __builtin_ia32_selectw_512 ((__mmask32) __U,
               (__v32hi) __W,
               (__v32hi) __A);
diff --git a/clang/lib/Headers/avx512fintrin.h b/clang/lib/Headers/avx512fintrin.h
index a525652e1e15a..fce49c477edfb 100644
--- a/clang/lib/Headers/avx512fintrin.h
+++ b/clang/lib/Headers/avx512fintrin.h
@@ -3366,33 +3366,29 @@ _mm512_maskz_permutex2var_epi64(__mmask8 __U, __m512i __A, __m512i __I,
 
 /* Vector Blend */
 
-static __inline __m512d __DEFAULT_FN_ATTRS512
-_mm512_mask_blend_pd(__mmask8 __U, __m512d __A, __m512d __W)
-{
+static __inline __m512d __DEFAULT_FN_ATTRS512_CONSTEXPR
+_mm512_mask_blend_pd(__mmask8 __U, __m512d __A, __m512d __W) {
   return (__m512d) __builtin_ia32_selectpd_512 ((__mmask8) __U,
                  (__v8df) __W,
                  (__v8df) __A);
 }
 
-static __inline __m512 __DEFAULT_FN_ATTRS512
-_mm512_mask_blend_ps(__mmask16 __U, __m512 __A, __m512 __W)
-{
+static __inline __m512 __DEFAULT_FN_ATTRS512_CONSTEXPR
+_mm512_mask_blend_ps(__mmask16 __U, __m512 __A, __m512 __W) {
   return (__m512) __builtin_ia32_selectps_512 ((__mmask16) __U,
                 (__v16sf) __W,
                 (__v16sf) __A);
 }
 
-static __inline __m512i __DEFAULT_FN_ATTRS512
-_mm512_mask_blend_epi64(__mmask8 __U, __m512i __A, __m512i __W)
-{
+static __inline __m512i __DEFAULT_FN_ATTRS512_CONSTEXPR
+_mm512_mask_blend_epi64(__mmask8 __U, __m512i __A, __m512i __W) {
   return (__m512i) __builtin_ia32_selectq_512 ((__mmask8) __U,
                 (__v8di) __W,
                 (__v8di) __A);
 }
 
-static __inline __m512i __DEFAULT_FN_ATTRS512
-_mm512_mask_blend_epi32(__mmask16 __U, __m512i __A, __m512i __W)
-{
+static __inline __m512i __DEFAULT_FN_ATTRS512_CONSTEXPR
+_mm512_mask_blend_epi32(__mmask16 __U, __m512i __A, __m512i __W) {
   return (__m512i) __builtin_ia32_selectd_512 ((__mmask16) __U,
                 (__v16si) __W,
                 (__v16si) __A);
diff --git a/clang/lib/Headers/avx512fp16intrin.h b/clang/lib/Headers/avx512fp16intrin.h
index 6989b86a7b68c..a6b0820de90cf 100644
--- a/clang/lib/Headers/avx512fp16intrin.h
+++ b/clang/lib/Headers/avx512fp16intrin.h
@@ -3306,7 +3306,7 @@ _mm512_reduce_min_ph(__m512h __V) {
   return __builtin_ia32_reduce_fmin_ph512(__V);
 }
 
-static __inline__ __m512h __DEFAULT_FN_ATTRS512
+static __inline__ __m512h __DEFAULT_FN_ATTRS512_CONSTEXPR
 _mm512_mask_blend_ph(__mmask32 __U, __m512h __A, __m512h __W) {
   return (__m512h)__builtin_ia32_selectph_512((__mmask32)__U, (__v32hf)__W,
                                               (__v32hf)__A);
diff --git a/clang/lib/Headers/avx512vlbwintrin.h b/clang/lib/Headers/avx512vlbwintrin.h
index ea6144008200a..426f02700ef8b 100644
--- a/clang/lib/Headers/avx512vlbwintrin.h
+++ b/clang/lib/Headers/avx512vlbwintrin.h
@@ -454,33 +454,29 @@ _mm_maskz_mullo_epi16(__mmask8 __U, __m128i __A, __m128i __B) {
                                              (__v8hi)_mm_setzero_si128());
 }
 
-static __inline__ __m128i __DEFAULT_FN_ATTRS128
-_mm_mask_blend_epi8 (__mmask16 __U, __m128i __A, __m128i __W)
-{
+static __inline__ __m128i __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_epi8(__mmask16 __U, __m128i __A, __m128i __W) {
   return (__m128i) __builtin_ia32_selectb_128 ((__mmask16) __U,
               (__v16qi) __W,
               (__v16qi) __A);
 }
 
-static __inline__ __m256i __DEFAULT_FN_ATTRS256
-_mm256_mask_blend_epi8 (__mmask32 __U, __m256i __A, __m256i __W)
-{
+static __inline__ __m256i __DEFAULT_FN_ATTRS256_CONSTEXPR
+_mm256_mask_blend_epi8(__mmask32 __U, __m256i __A, __m256i __W) {
   return (__m256i) __builtin_ia32_selectb_256 ((__mmask32) __U,
                (__v32qi) __W,
                (__v32qi) __A);
 }
 
-static __inline__ __m128i __DEFAULT_FN_ATTRS128
-_mm_mask_blend_epi16 (__mmask8 __U, __m128i __A, __m128i __W)
-{
+static __inline__ __m128i __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_epi16(__mmask8 __U, __m128i __A, __m128i __W) {
   return (__m128i) __builtin_ia32_selectw_128 ((__mmask8) __U,
                (__v8hi) __W,
                (__v8hi) __A);
 }
 
-static __inline__ __m256i __DEFAULT_FN_ATTRS256
-_mm256_mask_blend_epi16 (__mmask16 __U, __m256i __A, __m256i __W)
-{
+static __inline__ __m256i __DEFAULT_FN_ATTRS256_CONSTEXPR
+_mm256_mask_blend_epi16(__mmask16 __U, __m256i __A, __m256i __W) {
   return (__m256i) __builtin_ia32_selectw_256 ((__mmask16) __U,
                (__v16hi) __W,
                (__v16hi) __A);
diff --git a/clang/lib/Headers/avx512vlfp16intrin.h b/clang/lib/Headers/avx512vlfp16intrin.h
index 98ad9b54eef39..6be559d9a1a33 100644
--- a/clang/lib/Headers/avx512vlfp16intrin.h
+++ b/clang/lib/Headers/avx512vlfp16intrin.h
@@ -1984,14 +1984,13 @@ _mm256_maskz_fmadd_pch(__mmask8 __U, __m256h __A, __m256h __B, __m256h __C) {
                                                     (__v8sf)__C, (__mmask8)__U);
 }
 
-static __inline__ __m128h __DEFAULT_FN_ATTRS128 _mm_mask_blend_ph(__mmask8 __U,
-                                                                  __m128h __A,
-                                                                  __m128h __W) {
+static __inline__ __m128h __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_ph(__mmask8 __U, __m128h __A, __m128h __W) {
   return (__m128h)__builtin_ia32_selectph_128((__mmask8)__U, (__v8hf)__W,
                                               (__v8hf)__A);
 }
 
-static __inline__ __m256h __DEFAULT_FN_ATTRS256
+static __inline__ __m256h __DEFAULT_FN_ATTRS256_CONSTEXPR
 _mm256_mask_blend_ph(__mmask16 __U, __m256h __A, __m256h __W) {
   return (__m256h)__builtin_ia32_selectph_256((__mmask16)__U, (__v16hf)__W,
                                               (__v16hf)__A);
diff --git a/clang/lib/Headers/avx512vlintrin.h b/clang/lib/Headers/avx512vlintrin.h
index 6e16d2d4a0620..daf837934d72c 100644
--- a/clang/lib/Headers/avx512vlintrin.h
+++ b/clang/lib/Headers/avx512vlintrin.h
@@ -1631,57 +1631,57 @@ _mm256_maskz_add_ps(__mmask8 __U, __m256 __A, __m256 __B) {
                                              (__v8sf)_mm256_setzero_ps());
 }
 
-static __inline__ __m128i __DEFAULT_FN_ATTRS128
-_mm_mask_blend_epi32 (__mmask8 __U, __m128i __A, __m128i __W) {
+static __inline__ __m128i __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_epi32(__mmask8 __U, __m128i __A, __m128i __W) {
   return (__m128i) __builtin_ia32_selectd_128 ((__mmask8) __U,
                 (__v4si) __W,
                 (__v4si) __A);
 }
 
-static __inline__ __m256i __DEFAULT_FN_ATTRS256
-_mm256_mask_blend_epi32 (__mmask8 __U, __m256i __A, __m256i __W) {
+static __inline__ __m256i __DEFAULT_FN_ATTRS256_CONSTEXPR
+_mm256_mask_blend_epi32(__mmask8 __U, __m256i __A, __m256i __W) {
   return (__m256i) __builtin_ia32_selectd_256 ((__mmask8) __U,
                 (__v8si) __W,
                 (__v8si) __A);
 }
 
-static __inline__ __m128d __DEFAULT_FN_ATTRS128
-_mm_mask_blend_pd (__mmask8 __U, __m128d __A, __m128d __W) {
+static __inline__ __m128d __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_pd(__mmask8 __U, __m128d __A, __m128d __W) {
   return (__m128d) __builtin_ia32_selectpd_128 ((__mmask8) __U,
                  (__v2df) __W,
                  (__v2df) __A);
 }
 
-static __inline__ __m256d __DEFAULT_FN_ATTRS256
-_mm256_mask_blend_pd (__mmask8 __U, __m256d __A, __m256d __W) {
+static __inline__ __m256d __DEFAULT_FN_ATTRS256_CONSTEXPR
+_mm256_mask_blend_pd(__mmask8 __U, __m256d __A, __m256d __W) {
   return (__m256d) __builtin_ia32_selectpd_256 ((__mmask8) __U,
                  (__v4df) __W,
                  (__v4df) __A);
 }
 
-static __inline__ __m128 __DEFAULT_FN_ATTRS128
-_mm_mask_blend_ps (__mmask8 __U, __m128 __A, __m128 __W) {
+static __inline__ __m128 __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_ps(__mmask8 __U, __m128 __A, __m128 __W) {
   return (__m128) __builtin_ia32_selectps_128 ((__mmask8) __U,
                 (__v4sf) __W,
                 (__v4sf) __A);
 }
 
-static __inline__ __m256 __DEFAULT_FN_ATTRS256
-_mm256_mask_blend_ps (__mmask8 __U, __m256 __A, __m256 __W) {
+static __inline__ __m256 __DEFAULT_FN_ATTRS256_CONSTEXPR
+_mm256_mask_blend_ps(__mmask8 __U, __m256 __A, __m256 __W) {
   return (__m256) __builtin_ia32_selectps_256 ((__mmask8) __U,
                 (__v8sf) __W,
                 (__v8sf) __A);
 }
 
-static __inline__ __m128i __DEFAULT_FN_ATTRS128
-_mm_mask_blend_epi64 (__mmask8 __U, __m128i __A, __m128i __W) {
+static __inline__ __m128i __DEFAULT_FN_ATTRS128_CONSTEXPR
+_mm_mask_blend_epi64(__mmask8 __U, __m128i __A, __m128i __W) {
   return (__m128i) __builtin_ia32_selectq_128 ((__mmask8) __U,
                 (__v2di) __W,
                 (__v2di) __A);
 }
 
-static __inline__ __m256i __DEFAULT_FN_ATTRS256
-_mm256_mask_blend_epi64 (__mmask8 __U, __m256i __A, __m256i __W) {
+static __inline__ __m256i __DEFAULT_FN_ATTRS256_CONSTEXPR
+_mm256_mask_blend_epi64(__mmask8 __U, __m256i __A, __m256i __W) {
   return (__m256i) __builtin_ia32_selectq_256 ((__mmask8) __U,
                 (__v4di) __W,
                 (__v4di) __A);
diff --git a/clang/test/CodeGen/X86/avx512bw-builtins.c b/clang/test/CodeGen/X86/avx512bw-builtins.c
index 264a4578c2cd2..500b37feeb3bc 100644
--- a/clang/test/CodeGen/X86/avx512bw-builtins.c
+++ b/clang/test/CodeGen/X86/avx512bw-builtins.c
@@ -852,11 +852,57 @@ __m512i test_mm512_mask_blend_epi8(__mmask64 __U, __m512i __A, __m512i __W) {
   // CHECK: select <64 x i1> %{{.*}}, <64 x i8> %{{.*}}, <64 x i8> %{{.*}}
   return _mm512_mask_blend_epi8(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v64qi(
+  _mm512_mask_blend_epi8(
+    (__mmask64) 0x00000001,
+    (__m512i)(__v64qi) {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
+    (__m512i)(__v64qi){ 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25, 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25}
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+));
 __m512i test_mm512_mask_blend_epi16(__mmask32 __U, __m512i __A, __m512i __W) {
   // CHECK-LABEL: test_mm512_mask_blend_epi16
   // CHECK: select <32 x i1> %{{.*}}, <32 x i16> %{{.*}}, <32 x i16> %{{.*}}
   return _mm512_mask_blend_epi16(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v32hi(
+  _mm512_mask_blend_epi16(
+    (__mmask32) 0x00000001,
+    (__m512i)(__v32hi) {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
+    (__m512i)(__v32hi){ 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25}
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+));
+
+__m512i test_mm512_mask_blend_epi32(__mmask16 __U, __m512i __A, __m512i __W) {
+  // CHECK-LABEL: test_mm512_mask_blend_epi32
+  // CHECK: select <16 x i1> %{{.*}}, <16 x i32> %{{.*}}, <16 x i32> %{{.*}}
+  return _mm512_mask_blend_epi32(__U, __A, __W);
+}
+TEST_CONSTEXPR(match_v16si(
+  _mm512_mask_blend_epi32(
+    (__mmask16) 0x0001,
+    (__m512i)(__v16si) {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
+    (__m512i)(__v16si){ 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25}
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+));
+
+__m512i test_mm512_mask_blend_epi64(__mmask8 __U, __m512i __A, __m512i __W) {
+  // CHECK-LABEL: test_mm512_mask_blend_epi64
+  // CHECK: select <8 x i1> %{{.*}}, <8 x i64> %{{.*}}, <8 x i64> %{{.*}}
+  return _mm512_mask_blend_epi64(__U, __A, __W);
+}
+
+TEST_CONSTEXPR(match_v8di(
+  _mm512_mask_blend_epi64(
+    (__mmask8)0x01,
+    (__m512i)(__v8di){2, 2, 2, 2, 2, 2, 2, 2},
+    (__m512i)(__v8di){10, 11, 12, 13, 14, 15, 16, 17}
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2
+));
+
 __m512i test_mm512_abs_epi8(__m512i __A) {
   // CHECK-LABEL: test_mm512_abs_epi8
   // CHECK: [[ABS:%.*]] = call <64 x i8> @llvm.abs.v64i8(<64 x i8> %{{.*}}, i1 false)
diff --git a/clang/test/CodeGen/X86/avx512vl-builtins.c b/clang/test/CodeGen/X86/avx512vl-builtins.c
index 78e01b944ec5d..e39bfb9522ff8 100644
--- a/clang/test/CodeGen/X86/avx512vl-builtins.c
+++ b/clang/test/CodeGen/X86/avx512vl-builtins.c
@@ -3524,41 +3524,140 @@ __m128i test_mm_mask_blend_epi32(__mmask8 __U, __m128i __A, __m128i __W) {
   // CHECK: select <4 x i1> %{{.*}}, <4 x i32> %{{.*}}, <4 x i32> %{{.*}}
   return _mm_mask_blend_epi32(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v4si(
+  _mm_mask_blend_epi32(
+    (__mmask8)0x01,
+    (__m128i)(__v4si){2, 2, 2, 2},
+    (__m128i)(__v4si){ 10,11,12,13 }
+  ),
+  10, 2, 2, 2
+));
 __m256i test_mm256_mask_blend_epi32(__mmask8 __U, __m256i __A, __m256i __W) {
   // CHECK-LABEL: test_mm256_mask_blend_epi32
   // CHECK: select <8 x i1> %{{.*}}, <8 x i32> %{{.*}}, <8 x i32> %{{.*}}
   return _mm256_mask_blend_epi32(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v8si(
+  _mm256_mask_blend_epi32(
+    (__mmask8)0x01,
+    (__m256i)(__v8si){2, 2, 2, 2, 2, 2, 2, 2},
+    (__m256i)(__v8si){ 10,11,12,13,14,15,16,17 }
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2
+));
 __m128d test_mm_mask_blend_pd(__mmask8 __U, __m128d __A, __m128d __W) {
   // CHECK-LABEL: test_mm_mask_blend_pd
   // CHECK: select <2 x i1> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}}
   return _mm_mask_blend_pd(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_m128d(
+  _mm_mask_blend_pd(
+    (__mmask8)0x01, 
+    (__m128d)(__v2df){2.0, 2.0}, 
+    (__m128d)(__v2df){10.0, 20.0}
+  ),
+  10.0, 2.0
+));
 __m256d test_mm256_mask_blend_pd(__mmask8 __U, __m256d __A, __m256d __W) {
   // CHECK-LABEL: test_mm256_mask_blend_pd
   // CHECK: select <4 x i1> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}}
   return _mm256_mask_blend_pd(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_m256d(
+  _mm256_mask_blend_pd(
+    (__mmask8)0x01,
+    (__m256d)(__v4df){2.0, 2.0, 2.0, 2.0},
+    (__m256d)(__v4df){10.0, 11.0, 12.0, 13.0}
+  ),
+  10.0, 2.0, 2.0, 2.0
+));
+
+__m512d test_mm512_mask_blend_pd(__mmask8 __U, __m512d __A, __m512d __W) {
+  // CHECK-LABEL: test_mm512_mask_blend_pd
+  // CHECK: select <8 x i1> %{{.*}}, <8 x double> %{{.*}}, <8 x double> %{{.*}}
+  return _mm512_mask_blend_pd(__U, __A, __W);
+}
+
+TEST_CONSTEXPR(match_m512d(
+  _mm512_mask_blend_pd(
+    (__mmask8)0x01,
+    (__m512d)(__v8df){2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0},
+    (__m512d)(__v8df){10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0}
+  ),
+  10.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0
+));
+
 __m128 test_mm_mask_blend_ps(__mmask8 __U, __m128 __A, __m128 __W) {
   // CHECK-LABEL: test_mm_mask_blend_ps
   // CHECK: select <4 x i1> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}
   return _mm_mask_blend_ps(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_m128(
+  _mm_mask_blend_ps(
+    (__mmask8)0x01,
+    (__m128)(__v4sf){2.0f, 2.0f, 2.0f, 2.0f},
+    (__m128)(__v4sf){10.0f, 11.0f, 12.0f, 13.0f}
+  ),
+  10.0f, 2.0f, 2.0f, 2.0f
+));
+
 __m256 test_mm256_mask_blend_ps(__mmask8 __U, __m256 __A, __m256 __W) {
   // CHECK-LABEL: test_mm256_mask_blend_ps
   // CHECK: select <8 x i1> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}}
   return _mm256_mask_blend_ps(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_m256(
+  _mm256_mask_blend_ps(
+    (__mmask8)0x01,
+    (__m256)(__v8sf){2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f},
+    (__m256)(__v8sf){10.0f, 11.0f, 12.0f, 13.0f, 14.0f, 15.0f, 16.0f, 17.0f}
+  ),
+  10.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f
+));
+
+__m512 test_mm512_mask_blend_ps(__mmask8 __U, __m512 __A, __m512 __W) {
+  // CHECK-LABEL: test_mm512_mask_blend_ps
+  // CHECK: select <16 x i1> %{{.*}}, <16 x float> %{{.*}}, <16 x float> %{{.*}}
+  return _mm512_mask_blend_ps(__U, __A, __W);
+}
+TEST_CONSTEXPR(match_m512(
+  _mm512_mask_blend_ps(
+    (__mmask16)0x01,
+    (__m512)(__v16sf){2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+                      2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f},
+    (__m512)(__v16sf){10.0f, 11.0f, 12.0f, 13.0f, 14.0f, 15.0f, 16.0f, 17.0f,
+                      18.0f, 19.0f, 20.0f, 21.0f, 22.0f, 23.0f, 24.0f, 25.0f}
+  ),
+  10.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+  2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f
+));
+
 __m128i test_mm_mask_blend_epi64(__mmask8 __U, __m128i __A, __m128i __W) {
   // CHECK-LABEL: test_mm_mask_blend_epi64
   // CHECK: select <2 x i1> %{{.*}}, <2 x i64> %{{.*}}, <2 x i64> %{{.*}}
   return _mm_mask_blend_epi64(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v2di(
+  _mm_mask_blend_epi64(
+    (__mmask8)0x01,
+    (__m128i)(__v2di){2, 2},
+    (__m128i)(__v2di){ 10,11 }
+  ),
+  10, 2
+));
 __m256i test_mm256_mask_blend_epi64(__mmask8 __U, __m256i __A, __m256i __W) {
   // CHECK-LABEL: test_mm256_mask_blend_epi64
   // CHECK: select <4 x i1> %{{.*}}, <4 x i64> %{{.*}}, <4 x i64> %{{.*}}
   return _mm256_mask_blend_epi64(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v4di(
+  _mm256_mask_blend_epi64(
+    (__mmask8)0x01,
+    (__m256i)(__v4di){2, 2, 2, 2},
+    (__m256i)(__v4di){ 10,11,12,13 }
+  ),
+  10, 2, 2, 2
+));
 __m128d test_mm_mask_compress_pd(__m128d __W, __mmask8 __U, __m128d __A) {
   // CHECK-LABEL: test_mm_mask_compress_pd
   // CHECK: @llvm.x86.avx512.mask.compress
diff --git a/clang/test/CodeGen/X86/avx512vlbw-builtins.c b/clang/test/CodeGen/X86/avx512vlbw-builtins.c
index dd24ed86912be..58ddbae79f249 100644
--- a/clang/test/CodeGen/X86/avx512vlbw-builtins.c
+++ b/clang/test/CodeGen/X86/avx512vlbw-builtins.c
@@ -889,23 +889,56 @@ __m128i test_mm_mask_blend_epi8(__mmask16 __U, __m128i __A, __m128i __W) {
   // CHECK: select <16 x i1> %{{.*}}, <16 x i8> %{{.*}}, <16 x i8> %{{.*}}
   return _mm_mask_blend_epi8(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v16qi(
+  _mm_mask_blend_epi8(
+    (__mmask16)0x0001,
+    (__m128i)(__v16qi){2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
+    (__m128i)(__v16qi){ 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 }
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+));
+
 __m256i test_mm256_mask_blend_epi8(__mmask32 __U, __m256i __A, __m256i __W) {
   // CHECK-LABEL: test_mm256_mask_blend_epi8
   // CHECK: select <32 x i1> %{{.*}}, <32 x i8> %{{.*}}, <32 x i8> %{{.*}}
   return _mm256_mask_blend_epi8(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v32qi(
+  _mm256_mask_blend_epi8(
+    (__mmask32) 0x00000001,
+    (__m256i)(__v32qi) {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
+    (__m256i)(__v32qi){ 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25}
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+));
 
 __m128i test_mm_mask_blend_epi16(__mmask8 __U, __m128i __A, __m128i __W) {
   // CHECK-LABEL: test_mm_mask_blend_epi16
   // CHECK: select <8 x i1> %{{.*}}, <8 x i16> %{{.*}}, <8 x i16> %{{.*}}
   return _mm_mask_blend_epi16(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v8hi(
+  _mm_mask_blend_epi16(
+    (__mmask8)0x01,
+    (__m128i)(__v8hi){2, 2, 2, 2, 2, 2, 2, 2},
+    (__m128i)(__v8hi){ 10,11,12,13,14,15,16,17 }
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2
+));
 
 __m256i test_mm256_mask_blend_epi16(__mmask16 __U, __m256i __A, __m256i __W) {
   // CHECK-LABEL: test_mm256_mask_blend_epi16
   // CHECK: select <16 x i1> %{{.*}}, <16 x i16> %{{.*}}, <16 x i16> %{{.*}}
   return _mm256_mask_blend_epi16(__U,__A,__W); 
 }
+TEST_CONSTEXPR(match_v16hi(
+  _mm256_mask_blend_epi16(
+    (__mmask16)0x0001,
+    (__m256i)(__v16hi){2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2},
+    (__m256i)(__v16hi){ 10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 }
+  ),
+  10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
+));
 
 __m128i test_mm_mask_abs_epi8(__m128i __W, __mmask16 __U, __m128i __A) {
   // CHECK-LABEL: test_mm_mask_abs_epi8
@@ -915,7 +948,14 @@ __m128i test_mm_mask_abs_epi8(__m128i __W, __mmask16 __U, __m128i __A) {
   // CHECK: select <16 x i1> %{{.*}}, <16 x i8> [[ABS]], <16 x i8> %{{.*}}
   return _mm_mask_abs_epi8(__W,__U,__A); 
 }
-TEST_CONSTEXPR(match_v16qi(_mm_mask_abs_epi8((__m128i)(__v16qi){99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99}, (__mmask16)0x0001, (__m128i)(__v16qi){(char)-1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2}), 1, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99));
+TEST_CONSTEXPR(match_v16qi(
+  _mm_mask_abs_epi8(
+    (__m128i)(__v16qi){99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99},
+    (__mmask16)0x0001,
+    (__m128i)(__v16qi){(char)-1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2}
+  ),
+  1, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99
+));
 
 __m128i test_mm_maskz_abs_epi8(__mmask16 __U, __m128i __A) {
   // CHECK-LABEL: test_mm_maskz_abs_epi8
@@ -945,7 +985,13 @@ __m256i test_mm256_maskz_abs_epi8(__mmask32 __U, __m256i __A) {
   // CHECK: select <32 x i1> %{{.*}}, <32 x i8> [[ABS]], <32 x i8> %{{.*}}
   return _mm256_maskz_abs_epi8(__U,__A); 
 }
-TEST_CONSTEXPR(match_v32qi(_mm256_maskz_abs_epi8((__mmask32)0x55555555, (__m256i)(__v32qi){(char)-1, 2, (char)-3, 4, (char)-5, 6, (char)-7, 8, (char)-9, 10, (char)-11, 12, (char)-13, 14, (char)-15, 16, (char)-17, 18, (char)-19, 20, (char)-21, 22, (char)-23, 24, (char)-25, 26, (char)-27, 28, (char)-29, 30, (char)-31, 32}), 1, 0, 3, 0, 5, 0, 7, 0, 9, 0, 11, 0, 13, 0, 15, 0, 17, 0, 19, 0, 21, 0, 23, 0, 25, 0, 27, 0, 29, 0, 31, 0));
+TEST_CONSTEXPR(match_v32qi(
+  _mm256_maskz_abs_epi8(
+    (__mmask32)0x55555555,
+    (__m256i)(__v32qi){(char)-1, 2, (char)-3, 4, (char)-5, 6, (char)-7, 8, (char)-9, 10, (char)-11, 12, (char)-13, 14, (char)-15, 16, (char)-17, 18, (char)-19, 20, (char)-21, 22, (char)-23, 24, (char)-25, 26, (char)-27, 28, (char)-29, 30, (char)-31, 32}
+  ),
+  1, 0, 3, 0, 5, 0, 7, 0, 9, 0, 11, 0, 13, 0, 15, 0, 17, 0, 19, 0, 21, 0, 23, 0, 25, 0, 27, 0, 29, 0, 31, 0
+));
 
 __m128i test_mm_mask_abs_epi16(__m128i __W, __mmask8 __U, __m128i __A) {
   // CHECK-LABEL: test_mm_mask_abs_epi16
diff --git a/clang/test/CodeGen/X86/avx512vlfp16-builtins.c b/clang/test/CodeGen/X86/avx512vlfp16-builtins.c
index 828876e971dd2..860c2d0056591 100644
--- a/clang/test/CodeGen/X86/avx512vlfp16-builtins.c
+++ b/clang/test/CodeGen/X86/avx512vlfp16-builtins.c
@@ -2994,6 +2994,14 @@ __m128h test_mm_mask_blend_ph(__mmask8 __U, __m128h __A, __m128h __W) {
   // CHECK:  %{{.*}} = select <8 x i1> %{{.*}}, <8 x half> %{{.*}}, <8 x half> %{{.*}}
   return _mm_mask_blend_ph(__U, __A, __W);
 }
+TEST_CONSTEXPR(match_m128h(
+  _mm_mask_blend_ph(
+    (__mmask8)0x01,
+    (__m128h)(__v8hf){2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f},
+    (__m128h)(__v8hf){10.0f, 11.0f, 12.0f, 13.0f, 14.0f, 15.0f, 16.0f, 17.0f}
+  ),
+  10.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f
+));
 
 __m256h test_mm256_mask_blend_ph(__mmask16 __U, __m256h __A, __m256h __W) {
   // CHECK-LABEL: test_mm256_mask_blend_ph
@@ -3001,6 +3009,41 @@ __m256h test_mm256_mask_blend_ph(__mmask16 __U, __m256h __A, __m256h __W) {
   // CHECK:  %{{.*}} = select <16 x i1> %{{.*}}, <16 x half> %{{.*}}, <16 x half> %{{.*}}
   return _mm256_mask_blend_ph(__U, __A, __W);
 }
+TEST_CONSTEXPR(match_m256h(
+  _mm256_mask_blend_ph(
+    (__mmask16)0x0001,
+    (__m256h)(__v16hf){2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+                       2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f},
+    (__m256h)(__v16hf){10.0f, 11.0f, 12.0f, 13.0f, 14.0f, 15.0f, 16.0f, 17.0f,
+                       18.0f, 19.0f, 20.0f, 21.0f, 22.0f, 23.0f, 24.0f, 25.0f}
+  ),
+  10.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+  2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f
+));
+
+__m512h test_mm512_mask_blend_ph(__mmask32 __U, __m512h __A, __m512h __W) {
+  // CHECK-LABEL: test_mm512_mask_blend_ph
+  // CHECK: %{{.*}} = bitcast i32 %{{.*}} to <32 x i1>
+  // CHECK: %{{.*}} = select <32 x i1> %{{.*}}, <32 x half> %{{.*}}, <32 x half> %{{.*}}
+  return _mm512_mask_blend_ph(__U, __A, __W);
+}
+TEST_CONSTEXPR(match_m512h(
+  _mm512_mask_blend_ph(
+    (__mmask32)0x00000001,
+    (__m512h)(__v32hf){2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+                       2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+                       2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+                       2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f},
+    (__m512h)(__v32hf){10.0f, 11.0f, 12.0f, 13.0f, 14.0f, 15.0f, 16.0f, 17.0f,
+                       18.0f, 19.0f, 20.0f, 21.0f, 22.0f, 23.0f, 24.0f, 25.0f,
+                       26.0f, 27.0f, 28.0f, 29.0f, 30.0f, 31.0f, 32.0f, 33.0f,
+                       34.0f, 35.0f, 36.0f, 37.0f, 38.0f, 39.0f, 40.0f, 41.0f}
+  ),
+  10.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+  2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+  2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f,
+  2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f, 2.0f
+));
 
 __m128h test_mm_permutex2var_ph(__m128h __A, __m128i __I, __m128h __B) {
   // CHECK-LABEL: test_mm_permutex2var_ph