Liu Haibin wrote:
(match_operand:SI 2 "register_operand" "r")
But the problem is it uses normal register, like r8, r9. How can I
write the define_peephole2 so that it uses custom registers?
See the "Constraints" section of the documentation. "r" means a general
register. If you want a custom register, then you need to use a
contraint letter that maps to a custom register.
If the port does not already support custom registers, then you need to
modify many of the register allocation related macros to add support for
the custom registers. See the "Registers" and "Register Classes"
sections of the documentation.
--
Jim Wilson, GNU Tools Support, http://www.specifix.com
