[llvm] [CodeGen] Support MachineFunctionProperties in PassConcept (PR #79749)

[Arthur Eubanks via llvm-commits]

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@@ -1317,6 +1351,23 @@ struct InvalidateAnalysisPass
     auto PassName = MapClassName2PassName(ClassName);
     OS << "invalidate<" << PassName << '>';
   }
+
+  // MachineFunctionPass interface, define them separately to prevent
+  // dependency on CodeGen
+  template <typename MachineFunctionPropertiesT = MachineFunctionProperties>
+  static MachineFunctionPropertiesT getRequiredProperties() {
+    return MachineFunctionPropertiesT();
+  }
+
+  template <typename MachineFunctionPropertiesT = MachineFunctionProperties>
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aeubanks wrote:

oh, are these templates just to work around the IR -> CodeGen depenency? that's not great

let me try some things locally, like making a completely separate MachineFunctionPassManager

https://github.com/llvm/llvm-project/pull/79749