On 06/02/14 10:17, Dehao Chen wrote:
We need to rebuild frequency after vrp, otherwise the following code
in tree-ssa-threadupdate.c will make the frequency larger than
upper-bound.
/* Excessive jump threading may make frequencies large enough so
the computation overflows. */
if (rd->dup_blocks[0]->frequency < BB_FREQ_MAX * 2)
rd->dup_blocks[0]->frequency += EDGE_FREQUENCY (e);
This is referring to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61384
Can you try this with Teresa's revamping of the jump threading frequency
updates? It's still in my queue of things to review.
Fixing this stuff in the updater would be better than rebuilding the
frequencies, IMHO.
Jeff
