rnk accepted this revision.
rnk added a comment.
This revision is now accepted and ready to land.

Looks good to me. Let's wait for @jyknight though.



================
Comment at: lib/Headers/ia32intrin.h:120
+
+#ifndef _MSC_VER
+/* Select the correct function based on the size of long. */
----------------
Can you add comments here indicating that these are already provided as 
builtins for MSVC, so these macros are unnecessary?


================
Comment at: lib/Headers/ia32intrin.h:133
+
+#define _rotwl(a,b) __rolw((a), (b))
+#define _rotwr(a,b) __rorw((a), (b))
----------------
And, add a comment here indicating that these are not builtins, so they are 
provided in all modes.


Repository:
  rC Clang

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D59346/new/

https://reviews.llvm.org/D59346



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