On Sun, May 5, 2019 at 11:09 PM Eric Botcazou <ebotca...@adacore.com> wrote: > > > I have now applied this variant. > > You backported it onto the 8 branch on Friday: > > 2019-05-03 Richard Biener <rguent...@suse.de> > > Backport from mainline > [...] > 2019-03-07 Richard Biener <rguent...@suse.de> > > PR tree-optimization/89595 > * tree-ssa-dom.c (dom_opt_dom_walker::optimize_stmt): Take > stmt iterator as reference, take boolean output parameter to > indicate whether the stmt was removed and thus the iterator > already advanced. > (dom_opt_dom_walker::before_dom_children): Re-iterate over > stmts created by folding. > > and this introduced a regression for the attached Ada testcase at -O: > > Program received signal SIGSEGV, Segmentation fault. > 0x000000000102173c in set_value_range ( > vr=0x17747a0 <vr_values::get_value_range(tree_node > const*)::vr_const_varying>, t=VR_RANGE, min=0x7ffff6c3df78, max=<optimized > out>, equiv=0x0) > at /home/eric/svn/gcc-8-branch/gcc/tree-vrp.c:298 > 298 vr->type = t; > > on x86-64 at least. Mainline and 9 branch are not affected.
It looks like backporting r269597 might fix it though reverting that on trunk doesn't make the testcase fail there. Richard. > -- > Eric Botcazou
