[llvm] r223130 - R600/SI: Set correct number of user sgprs for HSA runtime

[Tom Stellard]

Author: tstellar
Date: Tue Dec  2 11:41:43 2014
New Revision: 223130

URL: http://llvm.org/viewvc/llvm-project?rev=223130&view=rev
Log:
R600/SI: Set correct number of user sgprs for HSA runtime

We don't support scratch buffers yet with HSA.

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

Modified: llvm/trunk/lib/Target/R600/SIISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/R600/SIISelLowering.cpp?rev=223130&r1=223129&r2=223130&view=diff
==============================================================================
--- llvm/trunk/lib/Target/R600/SIISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/R600/SIISelLowering.cpp Tue Dec  2 11:41:43 2014
@@ -489,7 +489,10 @@ SDValue SITargetLowering::LowerFormalArg
   // The pointer to the list of arguments is stored in SGPR0, SGPR1
 	// The pointer to the scratch buffer is stored in SGPR2, SGPR3
   if (Info->getShaderType() == ShaderType::COMPUTE) {
-    Info->NumUserSGPRs = 4;
+    if (Subtarget->isAmdHsaOS())
+      Info->NumUserSGPRs = 2;  // FIXME: Need to support scratch buffers.
+    else
+      Info->NumUserSGPRs = 4;
 
     unsigned InputPtrReg =
         TRI->getPreloadedValue(MF, SIRegisterInfo::INPUT_PTR);