[clang] [Clang][Lexer] Reopen "Detect SSE4.2 availability at runtime in fastParseASCIIIdentifier" (PR #175452)

[via cfe-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang/lib/Lex/Lexer.cpp --diff_from_common_commit
``````````

:warning:
The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/clang/lib/Lex/Lexer.cpp b/clang/lib/Lex/Lexer.cpp
index ca6a357f4..d46565f86 100644
--- a/clang/lib/Lex/Lexer.cpp
+++ b/clang/lib/Lex/Lexer.cpp
@@ -1954,11 +1954,10 @@ fastParseASCIIIdentifierSSE42(const char *CurPtr, const char *BufferEnd) {
     return CurPtr;
   }
 #endif
-static const char *
-fastParseASCIIIdentifier(const char *CurPtr,
-                         [[maybe_unused]] const char *BufferEnd) {
-  return fastParseASCIIIdentifierScalar(CurPtr);
-}
+  static const char *fastParseASCIIIdentifier(
+      const char *CurPtr, [[maybe_unused]] const char *BufferEnd) {
+    return fastParseASCIIIdentifierScalar(CurPtr);
+  }
 
 bool Lexer::LexIdentifierContinue(Token &Result, const char *CurPtr) {
   // Match [_A-Za-z0-9]*, we have already matched an identifier start.

``````````

</details>


https://github.com/llvm/llvm-project/pull/175452