Index: cfe/trunk/include/clang/Basic/BuiltinsX86.def
===================================================================
--- cfe/trunk/include/clang/Basic/BuiltinsX86.def
+++ cfe/trunk/include/clang/Basic/BuiltinsX86.def
@@ -2218,6 +2218,10 @@
 TARGET_BUILTIN(__builtin_ia32_dbpsadbw256_mask, "V16sV32cV32cIiV16sUs","","avx512bw,avx512vl")
 TARGET_BUILTIN(__builtin_ia32_dbpsadbw512_mask, "V32sV64cV64cIiV32sUi","","avx512bw")
 TARGET_BUILTIN(__builtin_ia32_psadbw512, "V8LLiV64cV64c","","avx512bw")
+TARGET_BUILTIN(__builtin_ia32_compressdf512_mask, "V8dV8dV8dUc","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_compressdi512_mask, "V8LLiV8LLiV8LLiUc","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_compresssf512_mask, "V16fV16fV16fUs","","avx512f")
+TARGET_BUILTIN(__builtin_ia32_compresssi512_mask, "V16iV16iV16iUs","","avx512f")
 
 
 #undef BUILTIN
Index: cfe/trunk/lib/Headers/avx512fintrin.h
===================================================================
--- cfe/trunk/lib/Headers/avx512fintrin.h
+++ cfe/trunk/lib/Headers/avx512fintrin.h
@@ -7561,6 +7561,74 @@
   __builtin_ia32_movntps512 (__P, (__v16sf) __A);
 }
 
+static __inline__ __m512d __DEFAULT_FN_ATTRS
+_mm512_mask_compress_pd (__m512d __W, __mmask8 __U, __m512d __A)
+{
+  return (__m512d) __builtin_ia32_compressdf512_mask ((__v8df) __A,
+                  (__v8df) __W,
+                  (__mmask8) __U);
+}
+
+static __inline__ __m512d __DEFAULT_FN_ATTRS
+_mm512_maskz_compress_pd (__mmask8 __U, __m512d __A)
+{
+  return (__m512d) __builtin_ia32_compressdf512_mask ((__v8df) __A,
+                  (__v8df)
+                  _mm512_setzero_pd (),
+                  (__mmask8) __U);
+}
+
+static __inline__ __m512i __DEFAULT_FN_ATTRS
+_mm512_mask_compress_epi64 (__m512i __W, __mmask8 __U, __m512i __A)
+{
+  return (__m512i) __builtin_ia32_compressdi512_mask ((__v8di) __A,
+                  (__v8di) __W,
+                  (__mmask8) __U);
+}
+
+static __inline__ __m512i __DEFAULT_FN_ATTRS
+_mm512_maskz_compress_epi64 (__mmask8 __U, __m512i __A)
+{
+  return (__m512i) __builtin_ia32_compressdi512_mask ((__v8di) __A,
+                  (__v8di)
+                  _mm512_setzero_si512 (),
+                  (__mmask8) __U);
+}
+
+static __inline__ __m512 __DEFAULT_FN_ATTRS
+_mm512_mask_compress_ps (__m512 __W, __mmask16 __U, __m512 __A)
+{
+  return (__m512) __builtin_ia32_compresssf512_mask ((__v16sf) __A,
+                 (__v16sf) __W,
+                 (__mmask16) __U);
+}
+
+static __inline__ __m512 __DEFAULT_FN_ATTRS
+_mm512_maskz_compress_ps (__mmask16 __U, __m512 __A)
+{
+  return (__m512) __builtin_ia32_compresssf512_mask ((__v16sf) __A,
+                 (__v16sf)
+                 _mm512_setzero_ps (),
+                 (__mmask16) __U);
+}
+
+static __inline__ __m512i __DEFAULT_FN_ATTRS
+_mm512_mask_compress_epi32 (__m512i __W, __mmask16 __U, __m512i __A)
+{
+  return (__m512i) __builtin_ia32_compresssi512_mask ((__v16si) __A,
+                  (__v16si) __W,
+                  (__mmask16) __U);
+}
+
+static __inline__ __m512i __DEFAULT_FN_ATTRS
+_mm512_maskz_compress_epi32 (__mmask16 __U, __m512i __A)
+{
+  return (__m512i) __builtin_ia32_compresssi512_mask ((__v16si) __A,
+                  (__v16si)
+                  _mm512_setzero_si512 (),
+                  (__mmask16) __U);
+}
+
 #undef __DEFAULT_FN_ATTRS
 
 #endif // __AVX512FINTRIN_H
Index: cfe/trunk/test/CodeGen/avx512f-builtins.c
===================================================================
--- cfe/trunk/test/CodeGen/avx512f-builtins.c
+++ cfe/trunk/test/CodeGen/avx512f-builtins.c
@@ -5238,3 +5238,50 @@
   _mm512_stream_ps(__P, __A); 
 }
 
+__m512d test_mm512_mask_compress_pd(__m512d __W, __mmask8 __U, __m512d __A) {
+  // CHECK-LABEL: @test_mm512_mask_compress_pd
+  // CHECK: @llvm.x86.avx512.mask.compress.pd.512
+  return _mm512_mask_compress_pd(__W, __U, __A); 
+}
+
+__m512d test_mm512_maskz_compress_pd(__mmask8 __U, __m512d __A) {
+  // CHECK-LABEL: @test_mm512_maskz_compress_pd
+  // CHECK: @llvm.x86.avx512.mask.compress.pd.512
+  return _mm512_maskz_compress_pd(__U, __A); 
+}
+
+__m512i test_mm512_mask_compress_epi64(__m512i __W, __mmask8 __U, __m512i __A) {
+  // CHECK-LABEL: @test_mm512_mask_compress_epi64
+  // CHECK: @llvm.x86.avx512.mask.compress.q.512
+  return _mm512_mask_compress_epi64(__W, __U, __A); 
+}
+
+__m512i test_mm512_maskz_compress_epi64(__mmask8 __U, __m512i __A) {
+  // CHECK-LABEL: @test_mm512_maskz_compress_epi64
+  // CHECK: @llvm.x86.avx512.mask.compress.q.512
+  return _mm512_maskz_compress_epi64(__U, __A); 
+}
+
+__m512 test_mm512_mask_compress_ps(__m512 __W, __mmask16 __U, __m512 __A) {
+  // CHECK-LABEL: @test_mm512_mask_compress_ps
+  // CHECK: @llvm.x86.avx512.mask.compress.ps.512
+  return _mm512_mask_compress_ps(__W, __U, __A); 
+}
+
+__m512 test_mm512_maskz_compress_ps(__mmask16 __U, __m512 __A) {
+  // CHECK-LABEL: @test_mm512_maskz_compress_ps
+  // CHECK: @llvm.x86.avx512.mask.compress.ps.512
+  return _mm512_maskz_compress_ps(__U, __A); 
+}
+
+__m512i test_mm512_mask_compress_epi32(__m512i __W, __mmask16 __U, __m512i __A) {
+  // CHECK-LABEL: @test_mm512_mask_compress_epi32
+  // CHECK: @llvm.x86.avx512.mask.compress.d.512
+  return _mm512_mask_compress_epi32(__W, __U, __A); 
+}
+
+__m512i test_mm512_maskz_compress_epi32(__mmask16 __U, __m512i __A) {
+  // CHECK-LABEL: @test_mm512_maskz_compress_epi32
+  // CHECK: @llvm.x86.avx512.mask.compress.d.512
+  return _mm512_maskz_compress_epi32(__U, __A); 
+}