[Bug middle-end/68697] New: [6 regression, CHKP] Many vararg-*.c tests fail (bounds violation is not detected)

[ienkovich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68697

            Bug ID: 68697
           Summary: [6 regression, CHKP] Many vararg-*.c tests fail
                    (bounds violation is not detected)
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ienkovich at gcc dot gnu.org
  Target Milestone: ---

All vararg tests in gcc.target/i386/mpx suite fail due to delayed VA_ARG
builtin call lowering.  We don't handle return bounds for internal functions
and therefore all pointers returned by VA_ARG get zero bounds.