[Bug tree-optimization/121091] ICE in tree_to_uhwi, at tree.cc:6660 with SVE switch choosing predicate values

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121091

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
  # pg_3 = PHI <pg_5(D)(2), { -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, -1, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... }(3), { 0, ... }(4),
{ -1, 0, -1, 0, 0, 0, 0, 0, ... }(5)>


So not a POLY_INT_CST but rather a VECTOR_CST that does not have a constant
size.