Store scheduling with DFA scheduler

[Vladimir Makarov]

Jon Beniston wrote:

>Hi,
>
>I'm trying to get the DFA scheduler in GCC 4.0.0 to schedule loads and
>stores, but I can only get it to work for loads. I have an automaton defined
>as follows:
>
>(define_automaton "cpu")
>
>(define_cpu_unit "x" "cpu")
>(define_cpu_unit "m" "cpu")
>
>(define_insn_reservation "arith" 1 (eq_attr "type" "arith") "x")
>(define_insn_reservation "loads" 2 (eq_attr "type" "load") "x,m")
>(define_insn_reservation "stores" 3 (eq_attr "type" "store") "x,m*2")
>
>All instructions take one cycle in "x". Loads then take one "m" cycle, while
>stores take two "m" cycles. Basically stores aren't fully pipelined.
>
>  
>
There is not enough information to say what is wrong.  It would be 
better if you send gcc output when -fsched-verbose=10 is used.

Vlad