On Wed, Jan 15, 2014 at 9:34 AM, Vladimir Makarov <vmaka...@redhat.com> wrote: > The following patch fixes: > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59511 > > Register move cost calculations were too conservative for some cases > and it resulted into overflows. The patch fixes also some wrong > frequencies usage I found. > > The patch has very small affect on SPEC2000. Only 7 programs out of > 26 has a different code for -mtune=corei7. For -mtune=generic, it is > only 3 programs. And there is no visible changes in performance for > given programs. So I'd say this PR is not worth P1 status. > > The patch was successfully bootstrapped and tested on x86/x86-64. > > Committed as rev. 206636. > > > 2014-01-15 Vladimir Makarov <vmaka...@redhat.com> > > PR rtl-optimization/59511 > * ira.c (ira_init_register_move_cost): Use memory costs for some > cases of register move cost calculations. > * lra-constraints.c (lra_constraints): Use REG_FREQ_FROM_BB > instead of BB frequency. > * lra-coalesce.c (move_freq_compare_func, lra_coalesce): Ditto. > * lra-assigns.c (find_hard_regno_for): Ditto.
This caused: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59835 -- H.J.
