[PATCH] D101338: [MS] Preserve base register %rbx around cpuid

[Reid Kleckner via Phabricator via cfe-commits]

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

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.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D101338/new/

https://reviews.llvm.org/D101338