if off >= len(data) {
		return 0, 0, r.makeEOFError(off)
	}
	symMode := data[off]
	if symMode&3 != 0 {
		return 0, 0, r.makeError(off, "invalid symbol compression mode")
	}
	off++

	// Set up the FSE tables used to decode the sequence codes.

	var err error
	off, err = r.setSeqTable(data, off, seqLiteral, (symMode>>6)&3)
	if err != nil {
		return 0, 0, err
	}

	symNodes := make(map[*objSymbol]graph.Nodes)
	for _, s := range symbols {
		// Gather samples for this symbol.
		for _, n := range ns {
			if address, err := s.file.ObjAddr(n.Info.Address); err == nil && address >= s.sym.Start && address < s.sym.End {
				symNodes[s] = append(symNodes[s], n)
			}
		}
	}
	return symNodes
}

type assemblyInstruction struct {

			args = args[1:]
		}

		// The code below assumes that we have handled all the ops
		// with sym effects already. Sanity check that here.
		// Ignore Args since they can't be autos.
		if v.Op.SymEffect() != SymNone && v.Op != OpArg {
			panic("unhandled op with sym effect")
		}

		if v.Uses == 0 && v.Op != OpNilCheck && !v.Op.IsCall() && !v.Op.HasSideEffects() || len(args) == 0 {

			p.Pos = q1.Pos
			p.To.Type = obj.TYPE_BRANCH
			switch o {
			case ADIV:
				p.To.Sym = symdiv
			case ADIVU:
				p.To.Sym = symdivu
			case AMOD:
				p.To.Sym = symmod
			case AMODU:
				p.To.Sym = symmodu
			}

			/* MOV REGTMP, b */
			p = obj.Appendp(p, newprog)
			p.As = AMOVW
			p.Pos = q1.Pos
			p.From.Type = obj.TYPE_REG
			p.From.Reg = REGTMP
			p.From.Offset = 0

	{REG_MB_OSH, 3},
	{REG_MB_OSHST, 2},
}

var oprange [ALAST & obj.AMask][]Optab

var xcmp [C_GOK + 1][C_GOK + 1]bool

var (
	symdiv  *obj.LSym
	symdivu *obj.LSym
	symmod  *obj.LSym
	symmodu *obj.LSym
)

// Note about encoding: Prog.scond holds the condition encoding,
// but XOR'ed with C_SCOND_XOR, so that C_SCOND_NONE == 0.
// The code that shifts the value << 28 has the responsibility

// identified by the symbol in its Aux field.
type SymEffect int8

const (
	SymRead SymEffect = 1 << iota
	SymWrite
	SymAddr

	SymRdWr = SymRead | SymWrite

	SymNone SymEffect = 0
)

// A Sym represents a symbolic offset from a base register.
// Currently a Sym can be one of 3 things:
//   - a *gc.Node, for an offset from SP (the stack pointer)

	{
		name:      "FwdRef",
		auxType:   auxSym,
		argLen:    0,
		symEffect: SymNone,
		generic:   true,
	},
	{
		name:    "Unknown",
		argLen:  0,
		generic: true,
	},
	{
		name:      "VarDef",
		auxType:   auxSym,
		argLen:    1,
		zeroWidth: true,
		symEffect: SymNone,
		generic:   true,
	},
	{
		name:      "VarLive",
		auxType:   auxSym,