[clang] [Clang] Improve EmitClangAttrSpellingListIndex (PR #114899)

[Erich Keane via cfe-commits]

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@@ -153,12 +153,35 @@ std::string AttributeCommonInfo::getNormalizedFullName() const {
       normalizeName(getAttrName(), getScopeName(), getSyntax()));
 }
 
+const std::map<StringRef, AttributeCommonInfo::Scope> ScopeMap = {
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erichkeane wrote:

use `llvm::StringMap`?  Worst case, probably should/could use `std::unordered_map`.

https://github.com/llvm/llvm-project/pull/114899