[llvm] [CodeGen] Add MachineRegisterClassInfo analysis pass (PR #120690)

[Matt Arsenault via llvm-commits]

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@@ -1005,6 +1016,7 @@
 ; GCN-O2-NEXT:        SI lower SGPR spill instructions
 ; GCN-O2-NEXT:        Virtual Register Map
 ; GCN-O2-NEXT:        Live Register Matrix
+; GCN-O2-NEXT:        Machine Register Class Info Analysis
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arsenm wrote:

Go through all the passes and add `AU.addPreserved<RegisterClassInfoWrapperPass>()` in getanalyisfsage 

https://github.com/llvm/llvm-project/pull/120690