https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88149
--- Comment #12 from rguenther at suse dot de <rguenther at suse dot de> --- On Fri, 23 Nov 2018, marxin at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88149 > > --- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> --- > (In reply to Richard Biener from comment #10) > > (In reply to Martin Liška from comment #8) > > > (In reply to Martin Liška from comment #7) > > > > (In reply to Richard Biener from comment #6) > > > > > Btw, the reduced testcase also fails before r265959. It looks like > > > > > the issue > > > > > is either very old or got introduced with making the SLP tree a > > > > > graph. > > > > > Well, let's see what tracking down the issue reveals. > > > > > > > > Right, this reduced code started to fail with r264866. > > > > > > Richi, are you interested in a reduced test-case that fails with r265959, > > > but not with r264866? > > > > I might be interested in one that fails on the GCC 8 branch or earlier. > > So you need to help what to grep in opt-info because it's not ICEing in GCC 8 > branch? It seems to rely on __muldc3 inline expansion added for GCC 9. One would need to open-code that. Similarly manually constructing the case should be possible. But let's not waste our time with all this... ;)
