[Bug c/110286] Wrong code at -O2 on x86_64-linux-gnu (nondeterministic output)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110286

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
In this case we have:
  # RANGE [irange] short int [0, 1] NONZERO 0x1
  # n_lsm.35_15 = PHI <_10(9), n_lsm.35_45(12)>
...
  # RANGE [irange] short int [0, 1] NONZERO 0x1
  # n_lsm.35_45 = PHI <n_lsm.35_15(11), _69(D)(6)>

  # RANGE [irange] short int [0, 1] NONZERO 0x1
  _10 = (short intD.17) _9;

But the range of _69(D) is really undefined ....

There is nothing phiopt/match is doing incorrectly due to the above, rather it
is ranger that might be considering the wrong/incorrect information for
uninitialized variables ...