-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/07/11 09:02, Maxim Kuvyrkov wrote: > On Apr 7, 2011, at 6:55 PM, Jeff Law wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> On 04/07/11 08:29, Maxim Kuvyrkov wrote: >>> The following simple patch fixes a corner-case in m68k scheduling when >>> -fsched-pressure is used. Currently m68k scheduling hooks assume that the >>> scheduler honors DFA restrictions, which is not always the case when >>> scheduling for register pressure (-fsched-pressure). The patch fixes this >>> corner-case. >>> >>> I will commit this patch under the trivial rule in 4 days (on Monday) or >>> sooner if I get an explicit approval. >> I guess my only concern would be whether or not this problem (buffer not >> being filled enough causing other problems) exists in any other backend. >> If it's not too much trouble, could you do a quick looksie at other >> backends that defining these hooks to see if they are obviously correct >> or incorrect? > > The sched_ib buffer is an invention of mine specific to m68k backend to model > bottleneck of ColdFire's memory bus, which is shared between data and > instructions. This buffer does not exist outside of m68k back-end. > > Jeff, does this answer your concern? It does. Thanks.
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