{name: "FPFlagFalse", argLength: 1, reg: readflags}, // bool, true if FP flag is false

		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of R22 (mips.REGCTXT, the closure pointer)
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R22")}}, zeroWidth: true},

		{name: "FPFlagFalse", argLength: 1, reg: readflags}, // bool, true if FP flag is false

		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of R22 (loong64.REGCTXT, the closure pointer)
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R29")}}, zeroWidth: true},

		{name: "FPFlagFalse", argLength: 1, reg: readflags}, // bool, true if FP flag is false

		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of R22 (mips.REGCTXT, the closure pointer)
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R22")}}, zeroWidth: true},

		{name: "LoweredZero", argLength: 2, reg: regInfo{inputs: []regMask{gp}}, aux: "Int64"},                    // large zeroing. arg0=start, arg1=mem, auxint=len, returns mem

		{name: "LoweredGetClosurePtr", reg: gp01},                                                                          // returns wasm.REG_CTXT, the closure pointer

			},
			clobberFlags:   true,
			faultOnNilArg0: true,
			faultOnNilArg1: true,
		},

		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of R7 (arm.REGCTXT, the closure pointer)
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R7")}}, zeroWidth: true},

(Convert ...) => (LoweredConvert ...)
(IsNonNil p) => (I64Eqz (I64Eqz p))
(IsInBounds ...) => (I64LtU ...)
(IsSliceInBounds ...) => (I64LeU ...)
(NilCheck ...) => (LoweredNilCheck ...)
(GetClosurePtr ...) => (LoweredGetClosurePtr ...)
(GetCallerPC ...) => (LoweredGetCallerPC ...)
(GetCallerSP ...) => (LoweredGetCallerSP ...)
(Addr {sym} base) => (LoweredAddr {sym} [0] base)

				// in the entry block where there are no phi functions, so there is no
				// conflict or ambiguity here.
				if b != f.Entry {
					f.Fatalf("LoweredGetClosurePtr appeared outside of entry block, b=%s", b.String())
				}
				score[v.ID] = ScorePhi
			case opcodeTable[v.Op].nilCheck:
				// Nil checks must come before loads from the same address.

		// Pseudo-ops
		{name: "LoweredGetG", argLength: 1, reg: gp01}, // arg0=mem
		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of DX (the closure pointer)
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("DX")}}, zeroWidth: true},

		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of the closure pointer.
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{ctxt}}, zeroWidth: true},

		// Pseudo-ops
		{name: "LoweredGetG", argLength: 1, reg: gp01}, // arg0=mem
		// Scheduler ensures LoweredGetClosurePtr occurs only in entry block,
		// and sorts it to the very beginning of the block to prevent other
		// use of R12 (the closure pointer)
		{name: "LoweredGetClosurePtr", reg: regInfo{outputs: []regMask{buildReg("R12")}}, zeroWidth: true},
		// arg0=ptr,arg1=mem, returns void.  Faults if ptr is nil.