diff --git a/clang/lib/Headers/cldemoteintrin.h b/clang/lib/Headers/cldemoteintrin.h
--- a/clang/lib/Headers/cldemoteintrin.h
+++ b/clang/lib/Headers/cldemoteintrin.h
@@ -18,11 +18,19 @@
 #define __DEFAULT_FN_ATTRS \
   __attribute__((__always_inline__, __nodebug__,  __target__("cldemote")))
 
+/// Hint to hardware that the cache line that contains \p __P should be demoted
+/// from the cache closest to the processor core to a level more distant from
+/// the processor core.
+///
+/// \headerfile <x86intrin.h>
+///
+/// This intrinsic corresponds to the <c> CLDRMOTE </c> instruction.
 static __inline__ void __DEFAULT_FN_ATTRS
 _cldemote(const void * __P) {
   __builtin_ia32_cldemote(__P);
 }
 
+#define _mm_cldemote(p) _cldemote(p)
 #undef __DEFAULT_FN_ATTRS
 
 #endif
diff --git a/clang/test/CodeGen/cldemote.c b/clang/test/CodeGen/cldemote.c
--- a/clang/test/CodeGen/cldemote.c
+++ b/clang/test/CodeGen/cldemote.c
@@ -7,4 +7,6 @@
   //CHECK-LABEL: @test_cldemote
   //CHECK: call void @llvm.x86.cldemote(i8* %{{.*}})
   _cldemote(p);
+  //CHECK: call void @llvm.x86.cldemote(i8* %{{.*}})
+  _mm_cldemote(p);
 }