[llvm] [RISCV] Report "too many operands" for surplus operands in AsmParser (PR #207142)

[Craig Topper via llvm-commits]

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@@ -1705,10 +1705,25 @@ void RISCVAsmParser::FilterNearMisses(
   std::multimap<unsigned, unsigned> OperandMissesSeen;
   SmallSet<FeatureBitset, 4> FeatureMissesSeen;
   bool ReportedTooFewOperands = false;
+  bool ReportedTooManyOperands = false;
 
   for (NearMissInfo &I : NearMissesIn) {
     switch (I.getKind()) {
     case NearMissInfo::NearMissOperand: {
+      // When the matcher finds surplus operands, it records them as
+      // NearMissOperand with InvalidMatchClass. We detect this and report
+      // "too many operands" instead of "invalid operand".
+      if (I.getOperandClass() == InvalidMatchClass) {
+        if (!ReportedTooManyOperands) {
+          SMLoc OperandLoc =
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topperc wrote:

Can we put this new code below the SMLoc OperandLoc on line 1727 so we don't need to do it separtely here?

https://github.com/llvm/llvm-project/pull/207142