[PATCH] D130754: [X86] Support ``-mindirect-branch-cs-prefix`` for call and jmp to indirect thunk
Phoebe Wang via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Fri Aug 5 00:52:40 PDT 2022
pengfei added a comment.
In D130754#3701858 <https://reviews.llvm.org/D130754#3701858>, @pengfei wrote:
> In D130754#3701837 <https://reviews.llvm.org/D130754#3701837>, @nikic wrote:
>> This change caused a significant compile-time regression for `O0` builds (about 1%): http://llvm-compile-time-tracker.com/compare.php?from=45bae1be90472c696f6ba3bb4f8fabee76040fa9&to=6f867f9102838ebe314c1f3661fdf95700386e5a&stat=instructions
>> At a guess, fetching a module flag for every single instruction is slow?
> Thanks for reporting it. I guess so. I'll try to move it outside :)
D131245 <https://reviews.llvm.org/D131245> should help with it.
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