https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63432
--- Comment #10 from Teresa Johnson <tejohnson at google dot com> --- On Fri, Oct 3, 2014 at 12:47 PM, hjl.tools at gmail dot com <gcc-bugzi...@gcc.gnu.org> wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63432 > > H.J. Lu <hjl.tools at gmail dot com> changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > Status|UNCONFIRMED |NEW > Last reconfirmed| |2014-10-03 > Ever confirmed|0 |1 > > --- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> --- > Bug is in > > static void > recompute_probabilities (basic_block bb) > { > edge esucc; > edge_iterator ei; > FOR_EACH_EDGE (esucc, ei, bb->succs) > { > if (bb->count) > esucc->probability = GCOV_COMPUTE_SCALE (esucc->count, > bb->count); > if (esucc->probability > REG_BR_PROB_BASE) > { > > We got > > (gdb) whatis esucc->probability > type = int > (gdb) p esucc->count > $7 = 2822215 > (gdb) p bb->count > $8 = 1 > (gdb) p esucc->probability > $9 = -1842621072 This points to a bigger problem, since esucc->count should be <= bb->count. Can you attach the input files and command line and I will take a closer look? Thanks, Teresa > (gdb) > > When count is set from frequency scaled up by REG_BR_PROB_BASE, > probability may overflow. > > -- > You are receiving this mail because: > You are on the CC list for the bug.
