[PATCH] D21933: AMDGPU: Enable trackLivenessAfterRegAlloc

[Matt Arsenault via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: tstellarAMD.
arsenm added a subscriber: llvm-commits.
Herald added subscribers: kzhuravl, arsenm.

This has caught a number of bugs.


http://reviews.llvm.org/D21933

Files:
  lib/Target/AMDGPU/SIRegisterInfo.cpp
  lib/Target/AMDGPU/SIRegisterInfo.h

Index: lib/Target/AMDGPU/SIRegisterInfo.h
===================================================================
--- lib/Target/AMDGPU/SIRegisterInfo.h
+++ lib/Target/AMDGPU/SIRegisterInfo.h
@@ -57,6 +57,7 @@
 
   bool requiresFrameIndexScavenging(const MachineFunction &MF) const override;
   bool requiresVirtualBaseRegisters(const MachineFunction &Fn) const override;
+  bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;
 
   int64_t getFrameIndexInstrOffset(const MachineInstr *MI,
                                    int Idx) const override;
Index: lib/Target/AMDGPU/SIRegisterInfo.cpp
===================================================================
--- lib/Target/AMDGPU/SIRegisterInfo.cpp
+++ lib/Target/AMDGPU/SIRegisterInfo.cpp
@@ -245,6 +245,11 @@
   return true;
 }
 
+bool SIRegisterInfo::trackLivenessAfterRegAlloc(const MachineFunction &MF) const {
+  // Enable this so BranchFolder can be run before register allocation.
+  return true;
+}
+
 int64_t SIRegisterInfo::getFrameIndexInstrOffset(const MachineInstr *MI,
                                                  int Idx) const {
   if (!SIInstrInfo::isMUBUF(*MI))


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