[PATCH] D110869: [X86] Implement -fzero-call-used-regs option

[Nathan Chancellor via Phabricator via llvm-commits]

nathanchance added a comment.

In D110869#3302625 <https://reviews.llvm.org/D110869#3302625>, @nickdesaulniers wrote:

> All built+boot. I know @nathanchance pointed out an issue with some already complex code, but I'm of the opinion that fn should be attributed in kernel sources.

Aside from that one diff I posted above adding `__attribute__((zero_call_used_regs("skip")))` to `_paravirt_ident_64()`, I have not noticed any issues with diff 	406596 on my two test machines; they boot right up and I am currently running them through my usual build tests. I will comment back if anything bad turns up.


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https://reviews.llvm.org/D110869