On Mon, Sep 24, 2012 at 8:57 PM, Cynbe ru Taren <cynbe-kw-gcchelp.bbf6e8@xxxxxxxx> wrote: > > (define_insn "addsi3" > [(set (match_operand:SI 0 "register_operand" "=r,r") > (plus:SI (match_operand:SI 1 "register_operand" "%r,r") > (match_operand:SI 2 "arith_operand" "r,I")))] > "" > "add%i2\\t%0, %1, %z2" > [(set_attr "type" "alu")]) > Searching on the above I find a similar report back in 2009 to which > Ian Lance Taylor suggested using a define_expand, but according to the > manual define_expand is useful only when named, for generating rtx, > whereas my (initial) problem is matching rtx, rather than generating > it, if I understand correctly. No, addsi3 is a named pattern and you could and should use define_expand. Ian
