[llvm] [DirectX] Fix build breaks (PR #128556)

[Farzon Lotfi via llvm-commits]

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@@ -243,6 +243,10 @@ class DXILBitcodeWriter {
   }
   void writeDIDerivedType(const DIDerivedType *N,
                           SmallVectorImpl<uint64_t> &Record, unsigned Abbrev);
+  void writeDISubrangeType(const DISubrangeType *N,
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farzonl wrote:

No its caused by `HANDLE_SPECIALIZED_MDNODE_LEAF_UNIQUABLE(DISubrangeType)` in `llvm/include/llvm/IR/Metadata.def` line 121. This is because `llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp` uses `Metadata.def` in `DXILBitcodeWriter::writeMetadataRecords`

https://github.com/llvm/llvm-project/pull/128556