[llvm] [TableGen] Add `!match` operator to do regex matching (PR #130759)

[Jay Foad via llvm-commits]

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@@ -1455,6 +1455,49 @@ const Init *TGParser::ParseOperation(Record *CurRec, const RecTy *ItemType) {
     return (ExistsOpInit::get(Type, Expr))->Fold(CurRec);
   }
 
+  case tgtok::XMatch: {
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jayfoad wrote:

Can you use the parsing code below that handles XConcat and all the other binops?

https://github.com/llvm/llvm-project/pull/130759