On Thu, Apr 28, 2016 at 04:15:41PM +0200, Jakub Jelinek wrote: > On Thu, Apr 28, 2016 at 04:10:01PM +0200, Marek Polacek wrote: > > That works too, though it of course affects all users, not just ubsan. > > Here's > > Of course, but I think that is a good thing ;) > > > the patch with your suggested change. > > > > Bootstrapped/regtested on x86_64-linux, ok for trunk? > > > > 2016-04-28 Marek Polacek <pola...@redhat.com> > > Jakub Jelinek <ja...@redhat.com> > > > > PR sanitizer/70342 > > * fold-const.c (tree_single_nonzero_warnv_p): For TARGET_EXPR, use > > TARGET_EXPR_SLOT as a base. > > > > * g++.dg/ubsan/null-7.C: New test. > > Ok for trunk.
Thanks, committed. > For 6.2 dunno, either the same patch after a while, or perhaps your original > patch is safer (though, wonder if e.g. one can construct a testcase where it > will use instrument &(TARGET_EXPR <...>.field) nested many times and still > trigger the compile time hog with your patch). Dunno either. I think I'll backport the same patch after a week or so. Marek