[PATCH] D122874: [clang] Add GNU spelling for no_unqiue_address attribute

[Nikolas Klauser via Phabricator via cfe-commits]

philnik created this revision.
philnik added reviewers: aaron.ballman, rsmith, RKSimon.
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philnik requested review of this revision.
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libc++ wants to switch from `__compressed_pair` to using `no_unique_address`. That is currently not possible, because there is no way to get the behaviour of `no_unique_address` in C++03. Adding the `__attribute__` spelling allows libc++ to switch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D122874

Files:
  clang/include/clang/Basic/Attr.td


Index: clang/include/clang/Basic/Attr.td
===================================================================
--- clang/include/clang/Basic/Attr.td
+++ clang/include/clang/Basic/Attr.td
@@ -1701,7 +1701,7 @@
 }
 
 def NoUniqueAddress : InheritableAttr, TargetSpecificAttr<TargetItaniumCXXABI> {
-  let Spellings = [CXX11<"", "no_unique_address", 201803>];
+  let Spellings = [GNU<"no_unique_address">, CXX11<"", "no_unique_address", 201803>];
   let Subjects = SubjectList<[NonBitField], ErrorDiag>;
   let Documentation = [NoUniqueAddressDocs];
   let SimpleHandler = 1;


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