case OpSP, OpSPanchored, OpSB, OpInitMem, OpArg, OpArgIntReg, OpArgFloatReg, OpPhi, OpVarDef, OpVarLive, OpKeepAlive, OpSelect0, OpSelect1, OpSelectN, OpConvert, OpInlMark, OpWBend:
				continue // ok not to lower
			case OpMakeResult:
				if b.Controls[0] == v {
					continue
				}
			case OpGetG:
				if f.Config.hasGReg {
					// has hardware g register, regalloc takes care of it
					continue // ok not to lower
				}
			}

	}
	return m0
}

func isBlockMultiValueExit(b *Block) bool {
	return (b.Kind == BlockRet || b.Kind == BlockRetJmp) && b.Controls[0] != nil && b.Controls[0].Op == OpMakeResult
}

type Abi1RO uint8 // An offset within a parameter's slice of register indices, for abi1.

// A registerCursor tracks which register is used for an Arg or regValues, or a piece of such.

	// result: x
	for {
		if auxIntToInt64(v.AuxInt) != 0 || v_0.Op != OpMakeResult || len(v_0.Args) < 1 {
			break
		}
		x := v_0.Args[0]
		v.copyOf(x)
		return true
	}
	// match: (SelectN [1] (MakeResult x y ___))
	// result: y
	for {
		if auxIntToInt64(v.AuxInt) != 1 || v_0.Op != OpMakeResult || len(v_0.Args) < 2 {
			break
		}
		y := v_0.Args[1]
		v.copyOf(y)

		return regInfo{outputs: []outputInfo{{regs: 1 << uint(reg)}}}
	}
	if op.IsCall() {
		if ac, ok := v.Aux.(*AuxCall); ok && ac.reg != nil {
			return *ac.Reg(&opcodeTable[op].reg, s.f.Config)
		}
	}
	if op == OpMakeResult && s.f.OwnAux.reg != nil {
		return *s.f.OwnAux.ResultReg(s.f.Config)
	}
	return opcodeTable[op].reg
}

func (s *regAllocState) isGReg(r register) bool {
	return s.f.Config.hasGReg && s.GReg == r
}

	// otherwise races will be attributed to the caller instead.
	if s.instrumentEnterExit {
		s.rtcall(ir.Syms.Racefuncexit, true, nil)
	}

	results[len(results)-1] = s.mem()
	m := s.newValue0(ssa.OpMakeResult, s.f.OwnAux.LateExpansionResultType())
	m.AddArgs(results...)

	b := s.endBlock()
	b.Kind = ssa.BlockRet
	b.SetControl(m)
	if s.hasdefer && s.hasOpenDefers {
		s.lastDeferFinalBlock = b
	}

	OpCvt32Uto32F
	OpCvt32Uto64F
	OpCvt32Fto32U
	OpCvt64Fto32U
	OpCvt64Uto32F
	OpCvt64Uto64F
	OpCvt32Fto64U
	OpCvt64Fto64U
	OpSelect0
	OpSelect1
	OpSelectN
	OpSelectNAddr
	OpMakeResult
	OpAtomicLoad8
	OpAtomicLoad32
	OpAtomicLoad64
	OpAtomicLoadPtr
	OpAtomicLoadAcq32
	OpAtomicLoadAcq64
	OpAtomicStore8
	OpAtomicStore32
	OpAtomicStore64
	OpAtomicStorePtrNoWB