pengfei added a comment.

In D93179#2473620 <https://reviews.llvm.org/D93179#2473620>, @RKSimon wrote:

> In D93179#2473342 <https://reviews.llvm.org/D93179#2473342>, @pengfei wrote:
>
>> Hi Simon, I found we have the same problem for fadd/fmul. See 
>> https://godbolt.org/z/3YKaGx
>> X86 Intrinsics imply `reassoc` flag, but `llvm.vector.reduce.*` doesn't.
>
> I'm not surprised - my current plan (after the holidays) is to add doxygen 
> descriptions for all the reduction intrinsics and then update them making it 
> clear what fast-math flags are assumed.

That's great. We are also updating intrinsic guide for such information. 
Anyway, have a good holiday.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D93179/new/

https://reviews.llvm.org/D93179

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