From: Michel Danzer <michel.daenzer@amd.com>
Date: Fri, 8 Mar 2013 10:58:01 +0000 (+0000)
Subject: R600/SI: Use source scheduler
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=d787c047bcc5d0d81743f9d4403d5c54fe4757fe;p=oota-llvm.git

R600/SI: Use source scheduler

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: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176687 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/R600/SIISelLowering.cpp b/lib/Target/R600/SIISelLowering.cpp
index fead115707a..063f5faa63d 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(