[llvm] [win][arm64ec] Handle empty function names (PR #151609)

[Eli Friedman via llvm-commits]

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@@ -46,7 +47,7 @@ class DSOLocalEquivalent;
 
 class LLVM_ABI TargetLoweringObjectFile : public MCObjectFileInfo {
   /// Name-mangler for global names.
-  Mangler *Mang = nullptr;
+  std::unique_ptr<Mangler> Mang = std::make_unique<Mangler>();
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efriedma-quic wrote:

Right, you can't name an unnamed function from any other translation unit, so as long as the name is consistent within the translation unit, you won't have any issues.

https://github.com/llvm/llvm-project/pull/151609