[clang][Interp][NFC] Add [[nodiscard]] attribute to emit functions

Author: tbaederr

clang/lib/AST/Interp/ByteCodeExprGen.cpp

@@ -1646,7 +1646,8 @@ bool ByteCodeExprGen<Emitter>::VisitMaterializeTemporaryExpr(
             SubExpr, *SubExprT, /*IsConst=*/true, /*IsExtended=*/true)) {
       if (!this->visit(SubExpr))
         return false;
-      this->emitSetLocal(*SubExprT, *LocalIndex, E);
+      if (!this->emitSetLocal(*SubExprT, *LocalIndex, E))
+        return false;
       return this->emitGetPtrLocal(*LocalIndex, E);
     }
   } else {

clang/utils/TableGen/ClangOpcodesEmitter.cpp

@@ -274,7 +274,7 @@ void ClangOpcodesEmitter::EmitGroup(raw_ostream &OS, StringRef N,
 
   // Emit the prototype of the group emitter in the header.
   OS << "#if defined(GET_EVAL_PROTO) || defined(GET_LINK_PROTO)\n";
-  OS << "bool " << EmitFuncName << "(";
+  OS << "[[nodiscard]] bool " << EmitFuncName << "(";
   for (size_t I = 0, N = Types->size(); I < N; ++I)
     OS << "PrimType, ";
   for (auto *Arg : Args)