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

[via llvm-commits]

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@@ -327,14 +332,29 @@ bool MIRParserImpl::parseMachineFunction(Module &M, MachineModuleInfo &MMI) {
                    "' isn't defined in the provided LLVM IR");
     }
   }
-  if (MMI.getMachineFunction(*F) != nullptr)
-    return error(Twine("redefinition of machine function '") + FunctionName +
-                 "'");
 
-  // Create the MachineFunction.
-  MachineFunction &MF = MMI.getOrCreateMachineFunction(*F);
-  if (initializeMachineFunction(YamlMF, MF))
-    return true;
+  if (!MAM) {
+    if (MMI.getMachineFunction(*F) != nullptr)
+      return error(Twine("redefinition of machine function '") + FunctionName +
+                   "'");
+
+    // Create the MachineFunction.
+    MachineFunction &MF = MMI.getOrCreateMachineFunction(*F);
+    if (initializeMachineFunction(YamlMF, MF))
+      return true;
+  } else {
+    auto &FAM =
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paperchalice wrote:

It need `MachineModuleInfo` to initialize `MachineFunction`.
https://github.com/llvm/llvm-project/blob/ff153bd553574e8049fb1f4d6858c889bc2e99a8/llvm/lib/CodeGen/MachineFunction.cpp#L164-L166

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