[llvm] [DirectX] legalize memset (PR #136244)

[Deric C. via llvm-commits]

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@@ -239,6 +247,77 @@ downcastI64toI32InsertExtractElements(Instruction &I,
   }
 }
 
+void emitMemsetExpansion(IRBuilder<> &Builder, Value *Dst, Value *Val,
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Icohedron wrote:

Should this function also be static?

https://github.com/llvm/llvm-project/pull/136244