[Bug tree-optimization/79334] Segfault on tree loop hoisting

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79334

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
So this should now be correctly checked after
g:fedcf3c476aff7533741a1c61071200f0a38cf83 which fixes prune_clobbered_mems.
That uses vn_reference_may_trap which only does

        case ARRAY_RANGE_REF:
        case ARRAY_REF:
          if (TREE_CODE (op->op0) == SSA_NAME)
            return true;

so doesn't return true for out-of-bound reads.  tree_could_trap_p uses
[range_]in_array_bounds_p which we'd need to replicate here.

I'm testing a patch.