for _, b := range f.Blocks {
		for _, v := range b.Values {
			if !opcodeTable[v.Op].generic {
				continue // lowered
			}
			switch v.Op {
			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
				}

		OpIMake, OpStringMake, OpSliceMake, OpStructMake0, OpStructMake1, OpStructMake2, OpStructMake3, OpStructMake4,
		OpConstBool, OpConst8, OpConst16, OpConst32, OpConst64, OpConst32F, OpConst64F, OpSB, OpSP,
		OpArgIntReg, OpArgFloatReg:
		return true
	}
	return false
}

// nextGoodStatementIndex returns an index at i or later that is believed
// to be a good place to start the statement for b.  This decision is

	for _, name := range f.Names {
		// Note: not "range f.NamedValues" above, because
		// that would be nondeterministic.
		for _, v := range f.NamedValues[*name] {
			if v.Op == OpArgIntReg || v.Op == OpArgFloatReg {
				aux := v.Aux.(*AuxNameOffset)
				// Never let an arg be bound to a differently named thing.
				if name.N != aux.Name || name.Off != aux.Offset {
					if f.pass.debug > stackDebug {

	for _, b := range f.Blocks {
		for _, v := range b.Values {
			if v.Op.isLoweredGetClosurePtr() {
				// Must stay in the entry block.
				continue
			}
			switch v.Op {
			case OpPhi, OpArg, OpArgIntReg, OpArgFloatReg, OpSelect0, OpSelect1, OpSelectN:
				// Phis need to stay in their block.
				// Arg must stay in the entry block.
				// Tuple selectors must stay with the tuple generator.

	// since the type we get from the ABI analyzer won't always match
	// what the compiler uses when creating OpArg{Int,Float}Reg ops.
	for _, v := range f.Entry.Values {
		if v.Op == OpArgIntReg || v.Op == OpArgFloatReg {
			aux := v.Aux.(*AuxNameOffset)
			sl := LocalSlot{N: aux.Name, Type: v.Type, Off: aux.Offset}
			// install slot in lookup table
			idx, _ := sc.lookup(sl)
			// add to f.NamedValues if not already present

// arg register index.
func ArgOpAndRegisterFor(r abi.RegIndex, abiConfig *abi.ABIConfig) (Op, int64) {
	i := abiConfig.FloatIndexFor(r)
	if i >= 0 { // float PR
		return OpArgFloatReg, i
	}
	return OpArgIntReg, int64(r)
}

type selKey struct {
	from          *Value // what is selected from
	offsetOrIndex int64  // whatever is appropriate for the selector
	size          int64

				score[v.ID] = ScoreNilCheck
			case v.Op == OpPhi:
				// We want all the phis first.
				score[v.ID] = ScorePhi
			case v.Op == OpArgIntReg || v.Op == OpArgFloatReg:
				// In-register args must be scheduled as early as possible to ensure that they
				// are not stomped (similar to the closure pointer above).
				// In particular, they need to come before regular OpArg operations because

	}
	if op == OpArgIntReg {
		reg := v.Block.Func.Config.intParamRegs[v.AuxInt8()]
		return regInfo{outputs: []outputInfo{{regs: 1 << uint(reg)}}}
	}
	if op == OpArgFloatReg {
		reg := v.Block.Func.Config.floatParamRegs[v.AuxInt8()]
		return regInfo{outputs: []outputInfo{{regs: 1 << uint(reg)}}}
	}
	if op.IsCall() {
		if ac, ok := v.Aux.(*AuxCall); ok && ac.reg != nil {

	case ssa.OpStoreReg:
		storeOp := storeByType(v.Type)
		p := s.Prog(storeOp)
		p.From.Type = obj.TYPE_REG
		p.From.Reg = v.Args[0].Reg()
		ssagen.AddrAuto(&p.To, v)

	case ssa.OpArgIntReg, ssa.OpArgFloatReg:
		// The assembler needs to wrap the entry safepoint/stack growth code with spill/unspill
		// The loop only runs once.
		for _, a := range v.Block.Func.RegArgs {

	// debuggers may attribute it to previous function in program.
	firstPos := src.NoXPos
	for _, v := range f.Entry.Values {
		if v.Pos.IsStmt() == src.PosIsStmt && v.Op != ssa.OpArg && v.Op != ssa.OpArgIntReg && v.Op != ssa.OpArgFloatReg && v.Op != ssa.OpLoadReg && v.Op != ssa.OpStoreReg {
			firstPos = v.Pos
			v.Pos = firstPos.WithDefaultStmt()
			break
		}
	}

	// inlMarks has an entry for each Prog that implements an inline mark.