[llvm] [PAC][ELF] Place AUTH constants in .data.rel.ro for position dependent code (PR #150418)

[Anatoly Trosinenko via llvm-commits]

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@@ -226,6 +227,20 @@ void TargetLoweringObjectFile::emitPseudoProbeDescMetadata(
   }
 }
 
+static bool containsConstantPtrAuth(const Constant *C) {
+  if (isa<ConstantPtrAuth>(C))
+    return true;
+
+  if (isa<BlockAddress>(C) || isa<GlobalValue>(C))
+    return false;
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atrosinenko wrote:

On the other hand, I would expect `containsConstantPtrAuth` to return false for `@ptr_to_global_var = constant ptr @global_var` no matter how `@global_value` is defined - I guess recursively inspecting `GlobalValue`s would make `containsConstantPtrAuth` incorrectly return `true` in such cases. Thus, the original "issue" should considered as a matter of comments or naming, if at all.

https://github.com/llvm/llvm-project/pull/150418