------- Comment #1 from vmakarov at redhat dot com 2009-04-15 21:49 ------- The compiler is broken in IRA on this test because ira_register_move_cost is not initialized for DFmode, AREG, GENERAL_REGS.
It is supposed that all necessary elements of this array are initialized in ira-costs.c by ira_init_register_move_cost but it was not done for this mode and reg classes for some reasons. I think that the elements should be checked for initialization every time when we need their values. It would be a tiny performance penalty but it will guarantee that such situation will be not occurred anymore. I'll send a patch soon. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39762
