------- Comment #38 from vmakarov at redhat dot com 2009-09-04 15:25 ------- Finally, I think I found what is the reason for all these bootstrap failures. I've changed code dealing with register preferences. Now regnfo::reg_pref is not null from the start and some passes (now it is regmove) using reg_(preferred,alternative)_class returns uninitialized data instead of GENERAL_REGS as before.
I don't see sense for these passes to use this info (it was in the old RA too: regclass initializing reg_pref was called only in local-alloc first time) because code in the passes assumes that reg_preferred_class returns right class (not GENERAL_REGS). I'll work for a work around. I hope to send it today. The right solution will take more time (may be week or two). I apologize for all that trouble I cause with my patch. But it permitted to find some pitfalls in RA (and the old one too). Thanks for all your help. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41241
