Add PRFCHW intrinsic support

- Add head 'prfchwintrin.h' to define '_m_prefetchw' which is mapped to
  LLVM/clang prefetch builtin
- Add option '-mprfchw' to enable PRFCHW feature and pre-define '__PRFCHW__'
  macro



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178041 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 0 deletions

diff --git a/test/CodeGen/prefetchw-builtins.c b/test/CodeGen/prefetchw-builtins.c
new file mode 100644
index 0000000000..9c5fdc7233
--- /dev/null
+++ b/test/CodeGen/prefetchw-builtins.c
@@ -0,0 +1,12 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -target-feature +prfchw -emit-llvm -o - %s | FileCheck %s
+
+// Don't include mm_malloc.h, it's system specific.
+#define __MM_MALLOC_H
+
+#include <x86intrin.h>
+
+void prefetch_w(void *p) {
+  return _m_prefetchw(p);
+// CHECK: @prefetch_w
+// CHECK: call void @llvm.prefetch({{.*}}, i32 1, i32 3, i32 1)
+}