[llvm] [CodeGen][Hexagon] Pass the shared RegisterClassInfo object to Hexagon frame lowering (PR #216752)

[Matt Arsenault via llvm-commits]

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@@ -520,7 +521,10 @@ class ScavengerTest : public MachineFunctionPass {
     // Let's hope that calling those outside of PrologEpilogueInserter works
     // well enough to initialize the scavenger with some emergency spillslots
     // for the target.
+    RegisterClassInfo RCI;
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arsenm wrote:

The dummy pass can also take it from the pass manager?

https://github.com/llvm/llvm-project/pull/216752