[llvm] [DirectX] Legalize lifetime intrinsics for DXIL (PR #148003)

[Finn Plummer via llvm-commits]

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@@ -2559,8 +2559,22 @@ void DXILBitcodeWriter::writeFunctionLevelValueSymbolTable(
   // to ensure the binary is the same no matter what values ever existed.
   SmallVector<const ValueName *, 16> SortedTable;
 
+  MallocAllocator Allocator;
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inbelic wrote:

Do we want to make it and `LifetimeValueNames` and then put the destruction of the names in the destructor?

https://github.com/llvm/llvm-project/pull/148003