"吴曦" <[EMAIL PROTECTED]> writes: > I observe that there is a ld instruction in 3rd alternative, so I add > a new define_insn before it in the hope that it will be matched > firstly.
It doesn't work that way. Your new instruction will wind up matching all move instructions. Reload will crash because the constraints don't work. Instead just change the existing movqi_internal insn. Don't try to write a new one. Change the existing insn to use C code which checks which_alternative instead of the @ list it uses now. Ian
