On Mon, 6 Mar 2017, Jeff Law wrote: > On 03/06/2017 03:58 PM, Jakub Jelinek wrote: > > Hi! > > > > Apparently fold_build_addr_expr doesn't make the argument addressable, > > it is only made addressable during following gimplification and that is too > > late here. > Yea. There's some special stuff going on here. I've never dug into the > details myself -- Richi knows it better than I.
You can't generally make things addressable out of thin air unless you know what you're doing (and fold_build_addr_expr is called all over the place). This is because doing that generally needs adjustment of points-to-info. > > > > Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for > > trunk? > > > > 2017-03-06 Jakub Jelinek <ja...@redhat.com> > > > > PR sanitizer/79897 > > * ubsan.c (ubsan_encode_value): Call mark_addressable on the > > temporary. > IMHO, you've got carte blanche in the sanitizer bits. So Ok. Yes, looks like the correct fix. Richard.
