================
@@ -1847,19 +1851,46 @@ bool Lexer::LexUnicodeIdentifierStart(Token &Result,
uint32_t C,
return true;
}
+static const char *fastParseASCIIIdentifier(const char *CurPtr, const char*
BufferEnd) {
+#ifdef __SSE4_2__
+ static constexpr char AsciiIdentifierRange[16] = {
+ '_', '_', 'A', 'Z', 'a', 'z', '0', '9',
+ };
+ constexpr ssize_t BytesPerRegister = 16;
+
+ while (LLVM_LIKELY(BufferEnd - CurPtr >= BytesPerRegister)) {
+ __m128i AsciiIdentifierRangeV = _mm_loadu_si128((const __m128i
*)AsciiIdentifierRange);
----------------
tbaederr wrote:
Can't you pull this out of the loop?
And can't you do an aligned load here (if you add the right `alignas()` to the
declaration)?
https://github.com/llvm/llvm-project/pull/68962
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