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

[Arthur Eubanks via llvm-commits]

================
@@ -129,16 +142,6 @@ class FunctionAnalysisManagerMachineFunctionProxy
       Arg.FAM = nullptr;
     }
 
-    ~Result() {
-      // FAM is cleared in a moved from state where there is nothing to do.
-      if (!FAM)
-        return;
-
-      // Clear out the analysis manager if we're being destroyed -- it means we
-      // didn't even see an invalidate call when we got invalidated.
-      FAM->clear();
-    }
-
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aeubanks wrote:

ah this code was copied from `InnerAnalysisManagerProxy` where an outer IR analysis manager can clear an inner IR analysis manager, which makes sense, but it doesn't make sense for a MachineFunctionAnalysisManager to clear a FunctionAnalysisManager. my bad for this code

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