[llvm] [CodeGen][NewPM] Port LiveDebugVariables to NPM (PR #115468)

[Matt Arsenault via llvm-commits]

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@@ -146,6 +147,7 @@ MACHINE_FUNCTION_PASS("opt-phis", OptimizePHIsPass())
 MACHINE_FUNCTION_PASS("peephole-opt", PeepholeOptimizerPass())
 MACHINE_FUNCTION_PASS("phi-node-elimination", PHIEliminationPass())
 MACHINE_FUNCTION_PASS("print", PrintMIRPass())
+MACHINE_FUNCTION_PASS("print<livedebugvars>", LiveDebugVariablesPrinterPass(dbgs()))
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arsenm wrote:

Can just use errs here in the first place, don't need to wait for the other PR 

https://github.com/llvm/llvm-project/pull/115468