[Bug target/107863] [10/11/12/13 Regression] ICE with unrecognizable insn when using -funsigned-char with some SSE/AVX builtins

[crazylht at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107863

--- Comment #5 from Hongtao.liu <crazylht at gmail dot com> ---
Also I get below from build_common_tree_nodes

  /* Define `char', which is like either `signed char' or `unsigned char'
     but not the same as either.  */
  char_type_node
    = (signed_char
       ? make_signed_type (CHAR_TYPE_SIZE)
       : make_unsigned_type (CHAR_TYPE_SIZE));

So using char_type_node should be ok with -funsigned_char?