[Bug tree-optimization/123374] [16 regression] elfutils: bogus warning when building debuginfod.cxx since r16-5258

[siddhesh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123374

--- Comment #16 from Siddhesh Poyarekar <siddhesh at gcc dot gnu.org> ---
Created attachment 63229
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63229&action=edit
restring waccess2 to only dangling pointer checks.

I'm testing this patch, restricting waccess2 to only dangling pointer checks.
If it doesn't regress anything in the testsuite, I think I'll post it as a
candidate patch.