[Bug jit/121436] Issue seen in gcc/testsuite/jit/test-signed-char.c

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121436

--- Comment #3 from Antoni <antoyo at gcc dot gnu.org> ---
It wasn't correct before the change because it was unconditionally set to
unsigned with:

build_common_tree_nodes (false)

And, yes it should support being changed with the flag: if it doesn't work,
that's a bug.