[llvm] [CodeGen][RAGreedy] Inform LiveDebugVariables about snippets spilled by InlineSpiller. (PR #109962)

[Bevin Hansson via llvm-commits]

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@@ -167,6 +167,10 @@ class InlineSpiller : public Spiller {
   // All registers to spill to StackSlot, including the main register.
   SmallVector<Register, 8> RegsToSpill;
 
+  // All registers that were replaced by the spiller. This includes registers
+  // that were rematerialized; rematted regs are removed from RegsToSpill.
+  SmallVector<Register, 8> RegsReplaced;
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bevin-hansson wrote:

I'm not sure what to return out of the spiller if I do this. It's currently an ArrayRef, but if the result is computed, what should get returned?

https://github.com/llvm/llvm-project/pull/109962