[NFC][Coroutine] Fix an error message on coro.id verification

[lxfind]

Summary

The error message should be about coro.id, not coro.begin

[rjmccall]

LGTM

llvm/lib/IR/Verifier.cpp

case Intrinsic::assume: {
     break;
   }
   case Intrinsic::coro_id: {
     auto *InfoArg = Call.getArgOperand(3)->stripPointerCasts();
     if (isa<ConstantPointerNull>(InfoArg))
       break;
     auto *GV = dyn_cast<GlobalVariable>(InfoArg);
     Assert(GV && GV->isConstant() && GV->hasDefinitiveInitializer(),
-      "info argument of llvm.coro.begin must refer to an initialized "
+           "info argument of llvm.coro.id must refer to an initialized "
            "constant");
     Constant *Init = GV->getInitializer();
     Assert(isa<ConstantStruct>(Init) || isa<ConstantArray>(Init),
-      "info argument of llvm.coro.begin must refer to either a struct or "
+           "info argument of llvm.coro.id must refer to either a struct or "
            "an array");
     break;
   }
 #define INSTRUCTION(NAME, NARGS, ROUND_MODE, INTRINSIC)                        \
   case Intrinsic::INTRINSIC:
 #include "llvm/IR/ConstrainedOps.def"
     visitConstrainedFPIntrinsic(cast<ConstrainedFPIntrinsic>(Call));
     break;
   case Intrinsic::dbg_declare: // llvm.dbg.declare