[llvm] [ReachingDefAnalysis] Extend the analysis to stack objects. (PR #118097)

[Michael Maitland via llvm-commits]

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@@ -422,7 +507,7 @@ void ReachingDefAnalysis::getLiveOuts(MachineBasicBlock *MBB, MCRegister Reg,
   VisitedBBs.insert(MBB);
   LiveRegUnits LiveRegs(*TRI);
   LiveRegs.addLiveOuts(*MBB);
-  if (LiveRegs.available(Reg))
+  if (Register::isPhysicalRegister(Reg) && LiveRegs.available(Reg))
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michaelmaitland wrote:

What does it mean if `isStackSlot(Reg) && LiveRegs.available()`? What is the reason we don't wan't to `return` in that case too?

https://github.com/llvm/llvm-project/pull/118097