hans added a comment.

The preprocessed source is attached to this comment: 
https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c26

good.s and bad.s are here: 
https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c28

And this shows the problematic difference between them: 
https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c30

After this change, for some reason x0 is getting clobbered in the prologue.

In https://bugs.chromium.org/p/chromium/issues/detail?id=1182642#c31 I verify 
that manually changing the register back to x1 fixes the issue.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D92808/new/

https://reviews.llvm.org/D92808

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