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

[Matt Arsenault via llvm-commits]

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@@ -576,8 +576,13 @@ class PassManager : public PassInfoMixin<
                           ExtraArgTs...>;
     // Do not use make_unique or emplace_back, they cause too many template
     // instantiations, causing terrible compile times.
-    Passes.push_back(std::unique_ptr<PassConceptT>(
-        new PassModelT(std::forward<PassT>(Pass))));
+    if constexpr (std::is_same_v<IRUnitT, MachineFunction>)
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arsenm wrote:

Braces 

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