[llvm] [AArch64] Refactor @plt, @gotpcrel, and @AUTH to use parseDataExpr (PR #134202)

[Fangrui Song via llvm-commits]

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@@ -8100,54 +8165,8 @@ bool AArch64AsmParser::parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) {
 bool AArch64AsmParser::parseAuthExpr(const MCExpr *&Res, SMLoc &EndLoc) {
   MCAsmParser &Parser = getParser();
   MCContext &Ctx = getContext();
-
   AsmToken Tok = Parser.getTok();
 
-  // Look for '_sym at AUTH' ...
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MaskRay wrote:

Right. In the absence of `@` specifiers, the expression can be handled by the generic `getParser().parseExpression(Res)`. 


https://github.com/llvm/llvm-project/pull/134202