[llvm] [PassManager] Support MachineFunctionProperties (PR #83668)

[Christudasan Devadasan via llvm-commits]

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@@ -64,6 +64,8 @@ extern llvm::cl::opt<bool> UseNewDbgInfoFormat;
 
 namespace llvm {
 
+class MachineFunction;
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cdevadas wrote:

I wasn't talking about this instance alone. But in general, while designing the machinery for NPM backend passes.

https://github.com/llvm/llvm-project/pull/83668