[libcxx-commits] [libcxx] [libc++] Renames ABI tag. (PR #78342)

[Louis Dionne via libcxx-commits]

================
@@ -218,8 +218,8 @@
 // https://github.com/llvm/llvm-project/issues/70494
 //
 // To fix the bug we had to change the ABI of some classes to remove [[no_unique_address]] under certain conditions.
-// The below macro is used for all classes whose ABI have changed as part of fixing these bugs.
-#  define _LIBCPP_ABI_2023_OVERLAPPING_SUBOBJECT_FIX_TAG __attribute__((__abi_tag__("subobj_fix_2023")))
+// The macro below is used for all classes whose ABI have changed as part of fixing these bugs.
+#  define _LIBCPP_ABI_LLVM18_NO_UNIQUE_ADDRESS __attribute__((__abi_tag__("nua")))
----------------
ldionne wrote:

```suggestion
#  define _LIBCPP_ABI_LLVM18_NO_UNIQUE_ADDRESS __attribute__((__abi_tag__("llvm18_nua")))
```

https://github.com/llvm/llvm-project/pull/78342