[Bug middle-end/91725] 275587[10 Regression] ICE in get_nonzero_bits starting with r275587

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91725

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 46866
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46866&action=edit
gcc10-pr91725.patch

Yet another untested patch, tree_nonzero_bits is something that already does
what you write above, just doesn't cope with vector types (as it uses
TYPE_PRECISION rather than element_precision).  But, get_nonzero_bits isn't
really useful on vector types anyway, for SSA_NAMEs we don't track the non-zero
bits and for VECTOR_CSTs we'd need to test all elements and or the bits
together.