On 16/10/2021 19:59, J. Gareth Moreton via fpc-devel wrote:
Sounds like "procvar = @myproc" would be -O4 at best due to the side-effects,
That's not a kind of side-effect that would be acceptable at any optimisation level. That is an explicit, valid comparison in code that would suddenly behave wrongly.
otherwise I would wonder if it's possible to track such references, especially with units that are pre-compiled.
It is possible to track whether the address gets taken of a procedure and store that if the ppu file if you would be so inclined. This means it will be impossible to apply the optimisation for any virtual method though, since all of their addresses get implicitly taken.
For the reason mentioned in my previous message, I don't think it's a good optimisation to implement in a compiler though.
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