https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63432
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> ---
r215830 introduced:
/* Scale up the frequency by REG_BR_PROB_BASE, to avoid rounding
errors applying the edge probability when the frequencies are very
small. */
epath->src->count = epath->src->frequency * REG_BR_PROB_BASE;
FOR_EACH_EDGE (esucc, ei, epath->src->succs)
esucc->count = apply_probability (esucc->src->count,
esucc->probability);
Can it guarantee that esucc->src->count has been scaled up by
REG_BR_PROB_BASE from esucc->src->frequency?
