[llvm] [NewPM][CodeGen] Add `FunctionToMachineFunctionAnalysis` (PR #88610)

[Arthur Eubanks via llvm-commits]

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@@ -327,12 +327,20 @@ class LLVMContext {
   // Module needs access to the add/removeModule methods.
   friend class Module;
 
+  // Each MachineFunction need a unique number.
+  // See FunctionNumber in MachineFunction.
+  friend class FunctionToMachineFunctionAnalysis;
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aeubanks wrote:

is this necessary?

https://github.com/llvm/llvm-project/pull/88610