Il 08/11/2013 10:37, Richard Biener ha scritto: > /* If we have a gate, combine the properties that we could have with > and without the pass being examined. */ > if (pass->has_gate) > properties &= new_properties; > else > properties = new_properties; > > which I don't understand (and you just removed all properties handling there).
The properties argument to register_dump_files_1 is indeed dead code; it is never used except to compute new_properties which is also dead (because it is simply the argument in a recursive call). I seem to recall it was needed back when pass->type didn't exist; it used PROP_rtl to find whether a pass was tree or gimple, or something like that. The above test and "&=" were needed for this to work at all optimization levels, but I don't recall the details and as said above it's all dead anyway. The argument to register_dump_files is used. To remove it, one could change all_*_passes from a pointer to a "dummy" pass, and set properties_required in the initializer for the dummy pass. Paolo
