[Mesa-dev] [PATCH] R600/SI: Use source scheduler

[Tom Stellard]

On Thu, Mar 07, 2013 at 05:05:47PM +0100, Michel Dänzer wrote:
> From: Michel Dänzer <michel.daenzer at amd.com>
> 
> This is certainly not the last word on scheduling for this target, but
> right now this allows a few apps to run / finish with radeonsi, most
> notably UT2004 / Lightsmark. They fail to compile some shaders with the
> default scheduler because it ends up trying to spill registers, which
> we don't support yet (and which is probably a bad idea in general for
> performance if it can be avoided).
> 
> NOTE: This is a candidate for the Mesa stable branch.
> 
Reviewed-by: Tom Stellard <thomas.stellard at amd.com>
> Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
> ---
>  lib/Target/R600/SIISelLowering.cpp | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
> index cc53488..b9cc09f 100644
> --- a/lib/Target/R600/SIISelLowering.cpp
> +++ b/lib/Target/R600/SIISelLowering.cpp
> @@ -68,6 +68,8 @@ SITargetLowering::SITargetLowering(TargetMachine &TM) :
>    setTargetDAGCombine(ISD::SELECT_CC);
>  
>    setTargetDAGCombine(ISD::SETCC);
> +
> +  setSchedulingPreference(Sched::Source);
>  }
>  
>  SDValue SITargetLowering::LowerFormalArguments(
> -- 
> 1.8.2.rc2
> 
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