[clang] [llvm] [Clang] restrict use of attribute names reserved by the C++ standard (PR #106036)

[Erich Keane via cfe-commits]

================
@@ -179,13 +179,15 @@ static bool isLanguageDefinedBuiltin(const SourceManager 
&SourceMgr,
 static bool isReservedCXXAttributeName(Preprocessor &PP, IdentifierInfo *II) {
   const LangOptions &Lang = PP.getLangOpts();
   if (Lang.CPlusPlus &&
-      hasAttribute(AttributeCommonInfo::Syntax::AS_CXX11, /*Scope*/ nullptr, 
II,
-                   PP.getTargetInfo(), Lang) > 0) {
-    AttributeCommonInfo::Kind AttrKind = AttributeCommonInfo::getParsedKind(
-        II, /*Scope*/ nullptr, AttributeCommonInfo::Syntax::AS_CXX11);
-    return !((AttrKind == AttributeCommonInfo::Kind::AT_Likely ||
-              AttrKind == AttributeCommonInfo::Kind::AT_Unlikely) &&
-             PP.isNextPPTokenLParen());
+      hasAttribute(AttributeCommonInfo::AS_CXX11, /* Scope*/ nullptr, II,
+                   PP.getTargetInfo(), Lang, /*CheckPlugins*/ false) > 0) {
+    AttributeCommonInfo::AttrArgsInfo AttrArgsInfo =
+        AttributeCommonInfo::getCXX11AttrArgsInfo(II);
+    if (AttrArgsInfo == AttributeCommonInfo::AttrArgsInfo::Required)
----------------
erichkeane wrote:

Did the likely/unlikely stuff get lost?  Is that a problem?

https://github.com/llvm/llvm-project/pull/106036
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