[llvm] r178021 - R600/SI: switch back to RegPressure scheduling

[Christian Konig]

Author: ckoenig
Date: Tue Mar 26 09:04:02 2013
New Revision: 178021

URL: http://llvm.org/viewvc/llvm-project?rev=178021&view=rev
Log:
R600/SI: switch back to RegPressure scheduling

Signed-off-by: Christian König <christian.koenig at amd.com>

Modified:
    llvm/trunk/lib/Target/R600/SIISelLowering.cpp
    llvm/trunk/lib/Target/R600/SIRegisterInfo.cpp
    llvm/trunk/lib/Target/R600/SIRegisterInfo.h

Modified: llvm/trunk/lib/Target/R600/SIISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIISelLowering.cpp?rev=178021&r1=178020&r2=178021&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/R600/SIISelLowering.cpp Tue Mar 26 09:04:02 2013
@@ -74,7 +74,7 @@ SITargetLowering::SITargetLowering(Targe
 
   setTargetDAGCombine(ISD::SETCC);
 
-  setSchedulingPreference(Sched::Source);
+  setSchedulingPreference(Sched::RegPressure);
 }
 
 SDValue SITargetLowering::LowerFormalArguments(

Modified: llvm/trunk/lib/Target/R600/SIRegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIRegisterInfo.cpp?rev=178021&r1=178020&r2=178021&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIRegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/R600/SIRegisterInfo.cpp Tue Mar 26 09:04:02 2013
@@ -30,6 +30,11 @@ BitVector SIRegisterInfo::getReservedReg
   return Reserved;
 }
 
+unsigned SIRegisterInfo::getRegPressureLimit(const TargetRegisterClass *RC,
+                                             MachineFunction &MF) const {
+  return RC->getNumRegs();
+}
+
 const TargetRegisterClass *
 SIRegisterInfo::getISARegClass(const TargetRegisterClass * rc) const {
   switch (rc->getID()) {

Modified: llvm/trunk/lib/Target/R600/SIRegisterInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIRegisterInfo.h?rev=178021&r1=178020&r2=178021&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIRegisterInfo.h (original)
+++ llvm/trunk/lib/Target/R600/SIRegisterInfo.h Tue Mar 26 09:04:02 2013
@@ -31,6 +31,9 @@ struct SIRegisterInfo : public AMDGPUReg
 
   virtual BitVector getReservedRegs(const MachineFunction &MF) const;
 
+  virtual unsigned getRegPressureLimit(const TargetRegisterClass *RC,
+                                       MachineFunction &MF) const;
+
   /// \param RC is an AMDIL reg class.
   ///
   /// \returns the SI register class that is equivalent to \p RC.