[llvm-dev] [RFC] New Feature Proposal: De-Optimizing Cold Functions using PGO Info

[Renato Golin via llvm-dev]

On Wed, 9 Sep 2020 at 19:26, Nemanja Ivanovic <nemanja.i.ibm at gmail.com>
wrote:

> - Default (i.e. no -profile-deopt-cold): do nothing
> - Option with no arg (i.e. -profile-deopt-cold): add attribute only to
> functions that have an execution count of zero
> - Option with an arg (i.e. -profile-deopt-cold=<N>): add attribute to
> functions that account for <N>% of total execution counts
>

I see. This looks confusing to me, but perhaps it's just me.

Though, I'm not sure we can get this behaviour from the same flag, as you
need to provide a default value if the flag isn't passed (usually boolean
or integer, not both).

>
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