[PATCH] D55285: AMDGPU: Scavenge register instead of findUnusedReg

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: rampitec.
Herald added subscribers: t-tye, tpr, dstuttard, yaxunl, nhaehnle, wdng, jvesely, kzhuravl.

https://reviews.llvm.org/D55285

Files:
  lib/Target/AMDGPU/SIRegisterInfo.cpp


Index: lib/Target/AMDGPU/SIRegisterInfo.cpp
===================================================================
--- lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -559,7 +559,7 @@
     // We don't have access to the register scavenger if this function is called
     // during  PEI::scavengeFrameVirtualRegs().
     if (RS)
-      SOffset = RS->FindUnusedReg(&AMDGPU::SGPR_32RegClass);
+      SOffset = RS->scavengeRegister(&AMDGPU::SGPR_32RegClass, 0, false);
 
     if (SOffset == AMDGPU::NoRegister) {
       // There are no free SGPRs, and since we are in the process of spilling


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