// value of Bits is a ready to use Bits value and represents the value 0.
type Bits []int

func (x Bits) add(y Bits) Bits {
	return append(x, y...)
}

func (x Bits) mul(y Bits) Bits {
	var p Bits
	for _, x := range x {
		for _, y := range y {
			p = append(p, x+y)
		}
	}
	return p
}

func TestMulBits(t *testing.T) {
	for _, test := range []struct {
		x, y, want Bits

	"LB",
	"LBU",
	"SW",
	"SH",
	"SB",
	"FENCE",
	"FENCETSO",
	"PAUSE",
	"ADDIW",
	"SLLIW",
	"SRLIW",
	"SRAIW",
	"ADDW",
	"SLLW",
	"SRLW",
	"SUBW",
	"SRAW",
	"LD",
	"SD",
	"MUL",
	"MULH",
	"MULHU",
	"MULHSU",
	"MULW",
	"DIV",
	"DIVU",
	"REM",
	"REMU",
	"DIVW",
	"DIVUW",
	"REMW",
	"REMUW",
	"LRD",
	"SCD",
	"LRW",
	"SCW",
	"AMOSWAPD",
	"AMOADDD",

		loong64.ACMPGTF, loong64.ACMPGTD:
		return true
	}
	return false
}

// IsLoong64MUL reports whether the op (as defined by an loong64.A* constant) is
// one of the MUL/DIV/REM instructions that require special handling.
func IsLoong64MUL(op obj.As) bool {
	switch op {
	case loong64.AMUL, loong64.AMULU, loong64.AMULV, loong64.AMULVU,
		loong64.ADIV, loong64.ADIVU, loong64.ADIVV, loong64.ADIVVU,

      %control_4 = tf_executor.island(%control_3)...

		panic(fmt.Sprintf("expected id %d in %T table", id, data))
	}
	return data
}

// frequency is nanoseconds per timestamp unit.
type frequency float64

// mul multiplies an unprocessed to produce a time in nanoseconds.
func (f frequency) mul(t timestamp) Time {
	return Time(float64(t) * float64(f))
}

// stringID is an index into the string table for a generation.
type stringID uint64

	ar := constant.MakeFloat64(2.3)
	ai := constant.MakeImag(constant.MakeInt64(5))
	a := constant.BinaryOp(ar, token.ADD, ai)

	// Compute (2.3 + 5i) * 11.
	b := constant.MakeUint64(11)
	c := constant.BinaryOp(a, token.MUL, b)

	// Convert c into a complex128.
	Ar, exact := constant.Float64Val(constant.Real(c))
	if !exact {
		fmt.Printf("Could not represent real part %s exactly as float64\n", constant.Real(c))
	}

	const (
		mulHi = 2549297995355413924
		mulLo = 4865540595714422341
		incHi = 6364136223846793005
		incLo = 1442695040888963407
	)

	// state = state * mul + inc
	hi, lo = bits.Mul64(p.lo, mulLo)
	hi += p.hi*mulLo + p.lo*mulHi
	lo, c := bits.Add64(lo, incLo, 0)
	hi, _ = bits.Add64(hi, incHi, c)
	p.lo = lo
	p.hi = hi
	return hi, lo
}

                        CALL 'public final fun times (other: kotlin.Int): kotlin.Int [operator] declared in kotlin.Int' type=kotlin.Int origin=MUL
                          $this: GET_VAR 'it: kotlin.Int declared in <root>.CodeFragment.run.<anonymous>' type=kotlin.Int origin=null
                          other: CONST Int type=kotlin.Int value=2

      op: "Add"
      count: 1
    }
    op_histogram {
      op: "Const"
      count: 4
    }
    op_histogram {
      op: "MatMul"
      count: 5
    }
    op_histogram {
      op: "Mul"
      count: 4
    }
  }
  unclustered_op_histogram {
    op: "NoOp"
    count: 2
  }
  unclustered_op_histogram {
    op: "_Arg"
    count: 1
  }
  unclustered_op_histogram {

  auto lhs_attr = mlir::dyn_cast_or_null<DenseElementsAttr>(operands[0]);
  auto rhs_attr = mlir::dyn_cast_or_null<DenseElementsAttr>(operands[1]);
  if (!rhs_attr && !(is_commutative && lhs_attr)) return {};

  // Mul and Div ops have identity value one while AddV2 and SubOp have identity
  // value zero.
  const int identity =
      (std::is_same<OpT, MulOp>::value || std::is_same<OpT, DivOp>::value ||