diff --git a/third_party/llvm-build/Release+Asserts/lib/clang/3.9.0/include/avx512pfintrin.h b/third_party/llvm-build/Release+Asserts/lib/clang/3.9.0/include/avx512pfintrin.h
new file mode 100644
index 0000000..54e94f1
--- /dev/null
+++ b/third_party/llvm-build/Release+Asserts/lib/clang/3.9.0/include/avx512pfintrin.h
@@ -0,0 +1,92 @@
+/*===------------- avx512pfintrin.h - PF intrinsics ------------------===
+ *
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ *===-----------------------------------------------------------------------===
+ */
+#ifndef __IMMINTRIN_H
+#error "Never use <avx512pfintrin.h> directly; include <immintrin.h> instead."
+#endif
+
+#ifndef __AVX512PFINTRIN_H
+#define __AVX512PFINTRIN_H
+
+/* Define the default attributes for the functions in this file. */
+#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("avx512pf")))
+
+#define _mm512_mask_prefetch_i32gather_pd( index,  mask, addr,  scale, hint) __extension__ ({\
+__builtin_ia32_gatherpfdpd (mask, (__v8si) index, (long long const *) addr, scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i32gather_ps( index,  mask, addr, scale,  hint) ({\
+__builtin_ia32_gatherpfdps (mask, (__v16si) index, (int const *) addr, scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i64gather_pd( index,  mask, addr,  scale, hint) __extension__ ({\
+__builtin_ia32_gatherpfqpd (mask, (__v8di) index, (long long const *) addr, scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i64gather_ps( index,  mask, addr, scale,  hint) ({\
+__builtin_ia32_gatherpfqps (mask, (__v8di) index, (int const *) addr, scale, hint);\
+})
+
+#define _mm512_prefetch_i32scatter_pd(addr,  index,  scale,  hint) __extension__ ({\
+__builtin_ia32_scatterpfdpd ((__mmask8) -1, (__v8si) index, \
+                            (void  *)addr, scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i32scatter_pd(addr,  mask,  index,  scale,  hint) __extension__ ({\
+__builtin_ia32_scatterpfdpd (mask, (__v8si) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#define _mm512_prefetch_i32scatter_ps(addr, index, scale, hint) __extension__ ({\
+__builtin_ia32_scatterpfdps ((__mmask16) -1, (__v16si) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i32scatter_ps(addr, mask, index, scale, hint) __extension__ ({\
+__builtin_ia32_scatterpfdps (mask, (__v16si) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#define _mm512_prefetch_i64scatter_pd(addr, index, scale, hint) __extension__ ({\
+__builtin_ia32_scatterpfqpd ((__mmask8) -1, (__v8di) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i64scatter_pd(addr, mask, index, scale, hint) __extension__ ({\
+__builtin_ia32_scatterpfqpd (mask, (__v8di) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#define _mm512_prefetch_i64scatter_ps(addr, index, scale, hint) __extension__ ({\
+__builtin_ia32_scatterpfqps ((__mmask8) -1, (__v8di) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#define _mm512_mask_prefetch_i64scatter_ps(addr, mask, index, scale, hint) __extension__ ({\
+__builtin_ia32_scatterpfqps (mask, (__v8di) index, (void  *) addr,\
+                             scale, hint);\
+})
+
+#undef __DEFAULT_FN_ATTRS
+
+#endif