dyung added inline comments.

================
Comment at: lib/Headers/xmmintrin.h:1927
 ///
-/// This intrinsic corresponds to the <c> VPEXTRQ / MOVQ </c> instruction.
+/// This intrinsic corresponds to the <c> VPEXTRQ / PEXTRQ </c> instruction.
 ///
----------------
RKSimon wrote:
> Not necessarily, it could be (v)movhps/(v)movhpd - but those are tricky to 
> generate in current isel.
Would it be preferred then for this to be the following:

```
/// This intrinsic corresponds to the <c> VPEXTRQ / PEXTRQ / VMOVHPS / VMOVHPD 
/ MOVHPS / MOVHPD </c> instruction.
```


https://reviews.llvm.org/D41523



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