------- Comment #9 from rguenther at suse dot de 2009-11-18 20:52 ------- Subject: Re: flag_gtoggle in free_lang_data hides -fcompare-debug errors
On Wed, 18 Nov 2009, aoliva at gcc dot gnu dot org wrote: > ------- Comment #8 from aoliva at gcc dot gnu dot org 2009-11-18 20:05 > ------- > We used to do such things, using pointers rather than UIDs even, and I fixed a > number of such issues to avoid codegen differences. But hey, if you could > prove that a DECL uid would never affect decisions taken by the compiler, > including decisions that might depend on the order in which you perform > similar > tests over difference pieces of code, more power to you, don't let me stand on > your way. Bonus points if you can devise a way to avoid such dependences on > UIDs from being accidentally introduced at a later time. This is what we have bootstrap-debug for. Btw, I obviously cannot "prove" anything. But one could randomize the delta we add to next_decl_uid - we should get bootstrap comparison errors very reliably that way. (I remember doing that once, but I don't remember the outcome) Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42088
