[clang] [llvm] [SystemZ][z/OS] __ptr32 support for z/OS in Clang (PR #96063)

[Sean Perry via cfe-commits]

================
@@ -7097,10 +7098,14 @@ static bool handleMSPointerTypeQualifierAttr(TypeProcessingState &State,
     else if (Attrs[attr::UPtr])
       ASIdx = LangAS::ptr32_uptr;
   } else if (PtrWidth == 64 && Attrs[attr::Ptr32]) {
-    if (Attrs[attr::UPtr])
+    if (Triple.isOSzOS()) {
----------------
perry-ca wrote:

```suggestion
    if (Attrs[attr::UPtr] || Triple.isOSzOS())
      ASIdx = LangAS::ptr32_uptr;
    else
      ASIdx = LangAS::ptr32_sptr;
```
This is simpler.

https://github.com/llvm/llvm-project/pull/96063