[llvm] [WIP] Extend data layout to add non zero null value for address space. (PR #83109)

[Matt Arsenault via llvm-commits]

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@@ -299,6 +302,17 @@ class DataLayout {
     return ManglingMode == MM_WinCOFFX86;
   }
 
+  uint64_t getNonZeroValueForAddrSpace(uint64_t AddrSpace) {
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arsenm wrote:

AddrSpace usually uses unsigned 

https://github.com/llvm/llvm-project/pull/83109