[llvm-branch-commits] [llvm] [AMDGPU] Physical register tracking in GCN trackers. (PR #184275)

[Matt Arsenault via llvm-branch-commits]

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@@ -471,6 +495,69 @@ LaneBitmask llvm::getLiveLaneMask(unsigned Reg, SlotIndex SI,
   return getLiveLaneMask(LIS.getInterval(Reg), SI, MRI, LaneMaskFilter);
 }
 
+bool GCNRPTracker::isUnitLiveAt(MCRegUnit Unit, SlotIndex SI) const {
+  const LiveRange *LR = LIS.getCachedRegUnit(Unit);
+  // If LIS has no reg-unit live range, be conservative and assume it is live.
+  return !LR || LR->liveAt(SI);
+}
+
+bool GCNRPTracker::allRegUnitsLive(MCRegister Reg) const {
+  assert(MRI && "MRI not initialized");
+  const TargetRegisterInfo *TRI = MRI->getTargetRegisterInfo();
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arsenm wrote:

I mean you can put it there 

https://github.com/llvm/llvm-project/pull/184275