[clang] [Parser][BoundsSafety] Print attribute as macro if it's system defined (PR #107619)

[Yeoul Na via cfe-commits]

================
@@ -5080,6 +5083,17 @@ void Parser::ParseLexedCAttribute(LateParsedAttribute 
&LA, bool EnterScope,
   ParseGNUAttributeArgs(&LA.AttrName, LA.AttrNameLoc, Attrs, nullptr, nullptr,
                         SourceLocation(), ParsedAttr::Form::GNU(), nullptr);
 
+  const auto &SM = PP.getSourceManager();
+  CharSourceRange ExpansionRange = SM.getExpansionRange(LA.AttrNameLoc);
+  StringRef FoundName =
+      Lexer::getSourceText(ExpansionRange, SM, PP.getLangOpts())
+          .split('(')
+          .first;
+  IdentifierInfo *MacroII = PP.getIdentifierInfo(FoundName);
----------------
rapidsna wrote:

Oops, yes, I missed the condition check here. Good catch!

https://github.com/llvm/llvm-project/pull/107619
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