https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94454
--- Comment #6 from Nathan Sidwell <nathan at acm dot org> --- On 4/2/20 12:37 PM, iains at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94454 > > --- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> --- > (In reply to Nathan Sidwell from comment #4) >> Oh, it is from the template specialization hash table. I suggest making >> that very poor to increase collisions: >> >> pt.c: >> static hashval_t >> hash_tmpl_and_args (tree tmpl, tree args) >> { >> hashval_t val = iterative_hash_object (DECL_UID (tmpl), 0); >> return val; // INSERT THIS LINE >> return iterative_hash_template_arg (args, val); >> } >> >> sorry for not realizing this earlier > > [not wishing to disturb the c-reduce sessions already started] > > On Darwin17 @r10-7488, which was always succeeding > > I bootstrapped with this patch, and then built a --disable-bootstrap with the > "spec_hasher::hash always returns 0" applied too. Ok, BTW spec_hasher::hash forwards to hash_tmpl_and_args. They must agree, so ... > Neither made any difference, the entire ranges-v3 suite built without issue. surprises me. > > Maybe that's informative in its own right. > > Will hopefully have some kind of reduced test-case for x86-64-linux tomorrow. >
