AaronBallman wrote:

> > The warning message is now emitted any time there is -Ofast in the 
> > command-line string, rather than only when -Ofast is the effective 
> > optimization level.
> 
> I'm not sure I see what the point in doing this is?

The flag is deprecated and someday (in the far future) might be removed at 
which point it will start to give a hard error when passed on the command line 
unless we go to special lengths to accept it and ignore it 
(https://godbolt.org/z/xn48sq85W), so it's better to always tell the user about 
the deprecation instead of only when the flag is the effective optimization 
level.

https://github.com/llvm/llvm-project/pull/183002
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