[Bug other/97417] RISC-V Unnecessary andi instruction when loading volatile bool

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97417

--- Comment #17 from Jim Wilson <wilson at gcc dot gnu.org> ---
Yes, LOAD_EXTEND_OP is a good suggestion.  We can maybe do something like
  int extend = (LOAD_EXTEND_OP (mode) == ZERO_EXTEND);
  temp_reg = force_reg (word_mode, convert_to_mode (word_mode, src, extend));