[Bug middle-end/88301] Optimization regression with undefined unsigned overflow

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88301

--- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> ---
In the EVRP dump, I see:

_2: unsigned int [0, 1]
_3: _Bool [0, 1]

[...]

  _1 = REALPART_EXPR <_6>;
  # RANGE [0, 1] NONZERO 1
  _2 = IMAGPART_EXPR <_6>;
  # RANGE [0, 0] NONZERO 0
  _3 = (_BoolD.1896) _2;

Not sure where this [0, 0] range is coming from...