{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("DX")}}, zeroWidth: true},
		// LoweredGetCallerPC evaluates to the PC to which its "caller" will return.
		// I.e., if f calls g "calls" getcallerpc,
		// the result should be the PC within f that g will return to.
		// See runtime/stubs.go for a more detailed discussion.
		{name: "LoweredGetCallerPC", reg: gp01, rematerializeable: true},

(IsInBounds idx len) => (LessThanU (CMP idx len))
(IsSliceInBounds idx len) => (LessEqualU (CMP idx len))

// pseudo-ops
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerSP ...) => (LoweredGetCallerSP ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)

// Absorb pseudo-ops into blocks.
(If (Equal cc) yes no) => (EQ cc yes no)
(If (NotEqual cc) yes no) => (NE cc yes no)
(If (LessThan cc) yes no) => (LT cc yes no)

(NilCheck ...) => (LoweredNilCheck ...)
(GetG mem) && v.Block.Func.OwnAux.Fn.ABI() != obj.ABIInternal => (LoweredGetG mem) // only lower in old ABI. in new ABI we have a G register.
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)
(GetCallerSP ...) => (LoweredGetCallerSP ...)

(HasCPUFeature {s}) => (SETNE (CMPLconst [0] (LoweredHasCPUFeature {s})))
(Addr {sym} base) => (LEAQ {sym} base)

(IsSliceInBounds idx len) => (LessEqualU (CMP idx len))

// pseudo-ops
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerSP   ...) => (LoweredGetCallerSP   ...)
(GetCallerPC   ...) => (LoweredGetCallerPC   ...)

// Absorb pseudo-ops into blocks.
(If (Equal         cc) yes no) => (EQ cc yes no)
(If (NotEqual      cc) yes no) => (NE cc yes no)
(If (LessThan      cc) yes no) => (LT cc yes no)

	add("runtime", "getclosureptr",
		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
			return s.newValue0(ssa.OpGetClosurePtr, s.f.Config.Types.Uintptr)
		},
		all...)

	add("runtime", "getcallerpc",
		func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
			return s.newValue0(ssa.OpGetCallerPC, s.f.Config.Types.Uintptr)
		},
		all...)

	add("runtime", "getcallersp",

		name:      "GetG",
		argLen:    1,
		zeroWidth: true,
		generic:   true,
	},
	{
		name:    "GetClosurePtr",
		argLen:  0,
		generic: true,
	},
	{
		name:    "GetCallerPC",
		argLen:  0,
		generic: true,
	},
	{
		name:    "GetCallerSP",
		argLen:  1,
		generic: true,
	},
	{
		name:    "PtrIndex",
		argLen:  2,
		generic: true,