Florian wrote at http://bugs.freepascal.org/view.php?id=20907
FPC has a good enough dfa, however it is only activated when compiling
with -Oodfa:
c:\fpc\svn\compiler>fpc ..\tw20907 -vw -Oodfa
Is that documented somewhere ? Is that production read or beta?
fpc -i only lists:
Supported Optimizations:
REGVAR
UNCERTAIN
STACKFRAME
PEEPHOLE
ASMCSE
LOOPUNROLL
TAILREC
CSE
Supported Whole Program Optimizations:
All
DEVIRTCALLS
OPTVMTS
SYMBOLLIVENESS
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