Index: lib/Headers/avx512fintrin.h
===================================================================
--- lib/Headers/avx512fintrin.h
+++ lib/Headers/avx512fintrin.h
@@ -4229,6 +4229,18 @@
                   _MM_FROUND_CUR_DIRECTION);
 }
 
+static __inline__ double __DEFAULT_FN_ATTRS
+_mm512_cvtsd_f64(__m512d __a)
+{
+  return __a[0];
+}
+
+static __inline__ float __DEFAULT_FN_ATTRS
+_mm512_cvtss_f32(__m512 __a)
+{
+  return __a[0];
+}
+
 /* Unpack and Interleave */
 
 static __inline __m512d __DEFAULT_FN_ATTRS
Index: test/CodeGen/avx512f-builtins.c
===================================================================
--- test/CodeGen/avx512f-builtins.c
+++ test/CodeGen/avx512f-builtins.c
@@ -7259,6 +7259,18 @@
   return _mm512_maskz_cvtps_epu32( __U, __A);
 }
 
+double test_mm512_cvtsd_f64(__m512d A) {
+  // CHECK-LABEL: test_mm512_cvtsd_f64
+  // CHECK: extractelement <8 x double> %{{.*}}, i32 0
+  return _mm512_cvtsd_f64(A);
+}
+
+float test_mm512_cvtss_f32(__m512 A) {
+  // CHECK-LABEL: test_mm512_cvtss_f32
+  // CHECK: extractelement <16 x float> %{{.*}}, i32 0
+  return _mm512_cvtss_f32(A);
+}
+
 __m512d test_mm512_mask_max_pd (__m512d __W, __mmask8 __U, __m512d __A, __m512d __B)
 {
   // CHECK-LABEL: @test_mm512_mask_max_pd