[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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@@ -251,6 +253,15 @@ template <typename IntTy> static Error getInt(StringRef R, IntTy &Result) {
   return Error::success();
 }
 
+template <typename IntTy>
+static Error getIntForAddrSpace(StringRef R, IntTy &Result) {
+  if (R.equals("neg"))
+    Result = -1;
+  else
+    return getInt<IntTy>(R, Result);
+  return Error::success();
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arsenm wrote:

This syntax doesn't really make sense. If we want special named values, "neg" doesn't really say "neg1"

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