> Yes, I don't like -O0 producing worse debug info - what does > the -O0 -fvar-tracking-assignments results look like?
I'd do the opposite: totally disable VTA at -O0 like we do for -fvar-tracking. We once tried to enable -fvar-tracking with -O0 at AdaCore and ended up with bloated and inferior debug info. I think we shouldn't need to do anything at -O0 apart from sufficiently curbing the code generator to get correct naive debug info; the sophisticated stuff should be reserved to -O and above. -- Eric Botcazou
