https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116080
--- Comment #26 from Andi Kleen <andi-gcc at firstfloor dot org> --- It's quite difficult to express the rules for tail calls for all targets in dejagnu effective rules. Currently we're a bit too aggressive for excluding on Power, but nobody has the energy to reopen it again, so there is too much unsupported there. Maybe it would be easier to just have an explicit rule table (instead of probing) for the difficult cases like Power
