------- Comment #2 from rguenth at gcc dot gnu dot org 2010-01-03 14:33 ------- This is because va_list_type_node is char * on some targets and so pointer-to char types get globbed into it. But va_list_type_node is re-constructed as char * at IL read time and thus we read back unsigned char * as signed char *.
Oops. I guess va_list_type_node better should be _not_ dependent on -f[un]signed-char. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42528
