[llvm] [WIP][CodeGen] Encode liveness for COPY instructions after virtRegRewriter pass. (PR #151123)

[Matt Arsenault via llvm-commits]

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@@ -1323,7 +1323,7 @@ def REG_SEQUENCE : StandardPseudoInstruction {
 }
 def COPY : StandardPseudoInstruction {
   let OutOperandList = (outs unknown:$dst);
-  let InOperandList = (ins unknown:$src);
+  let InOperandList = (ins unknown:$src, variable_ops);
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arsenm wrote:

You should not change the standard copy instruction 

https://github.com/llvm/llvm-project/pull/151123