bors 1f949e94e8 Auto merge of #86020 - nagisa:nagisa/outliner, r=pnkfelix
Disable the machine outliner by default

This addresses a codegen-issue that needs to be fixed upstream in LLVM.
While we wait for the fix, we can disable it.

Verified manually that the outliner is no longer run when
`-Copt-level=z` is specified, and also that you can override this with
`-Cllvm-args=-enable-machine-outliner` if you need it anyway.

A regression test is not really feasible in this instance, given that we
do not have any minimal reproducers.

Fixes #85351

cc `@pnkfelix`
2021-06-10 15:11:01 +00:00
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