pengfei added a comment.

In D101338#2726759 <https://reviews.llvm.org/D101338#2726759>, @rnk wrote:

> Seems reasonable, thanks.
>
> We really ought to solve the general problem one day. It is kind of 
> pig-headed that the backend just picks two arbitrary CSRs, the base and frame 
> pointers, and doesn't bother checking if any instructions clobber those 
> registers.

Agreed. Thanks Reid.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D101338/new/

https://reviews.llvm.org/D101338

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