(Less32 x (Const32 <t> [math.MinInt32+1])) => (Eq32 x (Const32 <t> [math.MinInt32]))
(Less16 x (Const16 <t> [math.MinInt16+1])) => (Eq16 x (Const16 <t> [math.MinInt16]))
(Less8  x (Const8  <t> [math.MinInt8 +1])) => (Eq8  x (Const8  <t> [math.MinInt8 ]))
(Less64 (Const64 <t> [math.MaxInt64-1]) x) => (Eq64 x (Const64 <t> [math.MaxInt64]))

// and ARM Manual says FCMP instruction sets PSTATE.<N,Z,C,V>
// of this case to (0, 0, 1, 1).
(Less32F x y) => (LessThanF (FCMPS x y))
(Less64F x y) => (LessThanF (FCMPD x y))

// For an unsigned integer x, the following rules are useful when combining branch
// 0 <  x  =>  x != 0
// x <= 0  =>  x == 0
// x <  1  =>  x == 0
// 1 <= x  =>  x != 0

	v_1 := v.Args[1]
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (Leq32U x y)
	// result: (Not (Less32U y x))
	for {
		x := v_0
		y := v_1
		v.reset(OpNot)
		v0 := b.NewValue0(v.Pos, OpLess32U, typ.Bool)
		v0.AddArg2(y, x)
		v.AddArg(v0)
		return true
	}
}
func rewriteValueRISCV64_OpLeq64(v *Value) bool {
	v_1 := v.Args[1]