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

[Pengfei Wang via Phabricator via cfe-commits]

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.


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https://reviews.llvm.org/D101338