[clang] [CLANG] Enable alignas after GNU attributes (PR #133107)

[via cfe-commits]

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@@ -3035,11 +3035,14 @@ Parser::DeclGroupPtrTy Parser::ParseCXXClassMemberDeclaration(
   }
 
   ParsedAttributes DeclSpecAttrs(AttrFactory);
-  MaybeParseMicrosoftAttributes(DeclSpecAttrs);
-
   // Hold late-parsed attributes so we can attach a Decl to them later.
   LateParsedAttrList CommonLateParsedAttrs;
 
+  while (MaybeParseCXX11Attributes(DeclAttrs) ||
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DenisGZM wrote:

I followed the same rule as in `ParseStatementOrDeclaration` where CXX11 Attrs are gathered into `DeclAttrs` and GNU and MS are gathered into `DeclSpecAttrs` before `ParseStatementOrDeclarationAfterAttributes`. 

It seems that `DeclAttrs` is used later to adjust type (e.g. set align). For precise details I still need deep code inspection

https://github.com/llvm/llvm-project/pull/133107