[fpc-devel] Peephole optimizer passes

[J. Gareth Moreton]

In the meantime, my research has revealed some peephole optimizer bugs.  
Normally these bugs aren't triggered, but given one of them manifested 
simply by running Pass 2 twice, I feel they may have the potential to 
manifest themselves in contrived examples. Thereforem, I have made a 
merge request that fixes these bugs and is presently a pure refactor:

https://gitlab.com/freepascal.org/fpc/source/-/merge_requests/155

Gareth aka. Kit


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