On 11/06/2012 05:50 PM, Paulo Matos wrote: > I am following your advice and using sched.reorg to remove the > instruction from the ready list. What I am doing is checking the > register written in ready[n_ready - 1] (if any) and look for the > remainder of the ready list for insns writing to the same register.
That probably won't work, you'll need to keep track of which registers have already been written in the current cycle - that needs to be updated in the variable_issue hook. > If I find one such insn, in index k, then I remove the insn by > moving all insns from 0 -> k-1 to 1-> k (essentially shifting right all instructions below k. If you also put it back into the position in the array that has become free, that sounds about right. > However this is getting me into trouble with an ice. I feel like I should instead be moving the instruction from ready to pending instead of simply removing it from ready, however I have no access to Haifa-sched.c internals from the backend. Well, if you're doing it right, you're not really removing the instructions, just reordering the array and returning a different value for n_ready. Look at c6x.c for some example code. Bernd
