[Bug middle-end/110117] [14 Regression] ICE on valid code at -O1 with "-ftree-vrp -fno-tree-ccp -fno-tree-forwprop": in as_a, at machmode.h:381

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110117

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This was "fixed" by r14-1534-g908e5ab5c11c64 as we don't have a nonzero bits on
_5 in :

  # RANGE [irange] int [-2147483647, +INF]
  _4 = 0;
  _5 = _4 & 1;
  _39 = _5 != 0;

Since we don't have a non-zero bits we don't look back at the TER to see it was
&1 and we don't call into expand_single_bit_test .

I am still going to fix expand_single_bit_test to do the correct thing for
const_int but we no longer ICEs in the original testcase.