gc

const (
	WORDSIZE  = 4
	WORDBITS  = 32
	WORDMASK  = WORDBITS - 1
	WORDSHIFT = 5
)

const (
	EscFuncUnknown = 0 + iota
	EscFuncPlanned
	EscFuncStarted
	EscFuncTagged
)

const (
	EscUnknown = iota
	EscNone    // Does not escape to heap, result, or parameters.
	EscReturn  // Is returned or reachable from returned.
	EscScope   // Allocated in an inner loop scope, assigned to an outer loop scope,
	// which allows the construction of non-escaping but arbitrarily large linked
	// data structures (i.e., not eligible for allocation in a fixed-size stack frame).
	EscHeap           // Reachable from the heap
	EscNever          // By construction will not escape.
	EscBits           = 3
	EscMask           = (1 << EscBits) - 1
	EscContentEscapes = 1 << EscBits // value obtained by indirect of parameter escapes to heap
	EscReturnBits     = EscBits + 1
)

const (
	FErr = iota
	FDbg
	FExp
	FTypeId
)

const (
	NHUNK           = 50000
	BUFSIZ          = 8192
	NSYMB           = 500
	NHASH           = 1024
	MAXALIGN        = 7
	UINF            = 100
	PRIME1          = 3
	BADWIDTH        = -1000000000
	MaxStackVarSize = 10 * 1024 * 1024
)

const (
	// These values are known by runtime.
	// The MEMx and NOEQx values must run in parallel.  See algtype.
	AMEM = iota
	AMEM0
	AMEM8
	AMEM16
	AMEM32
	AMEM64
	AMEM128
	ANOEQ
	ANOEQ0
	ANOEQ8
	ANOEQ16
	ANOEQ32
	ANOEQ64
	ANOEQ128
	ASTRING
	AINTER
	ANILINTER
	ASLICE
	AFLOAT32
	AFLOAT64
	ACPLX64
	ACPLX128
	AUNK = 100
)

const (
	// Maximum size in bits for Mpints before signalling
	// overflow and also mantissa precision for Mpflts.
	Mpprec = 512
	// Turn on for constant arithmetic debugging output.
	Mpdebug = false
)

const (
	SymExport   = 1 << 0 // to be exported
	SymPackage  = 1 << 1
	SymExported = 1 << 2 // already written out by export
	SymUniq     = 1 << 3
	SymSiggen   = 1 << 4
	SymAsm      = 1 << 5
	SymAlgGen   = 1 << 6
)

const (
	Txxx = iota

	TINT8
	TUINT8
	TINT16
	TUINT16
	TINT32
	TUINT32
	TINT64
	TUINT64
	TINT
	TUINT
	TUINTPTR

	TCOMPLEX64
	TCOMPLEX128

	TFLOAT32
	TFLOAT64

	TBOOL

	TPTR32
	TPTR64

	TFUNC
	TARRAY
	T_old_DARRAY
	TSTRUCT
	TCHAN
	TMAP
	TINTER
	TFORW
	TFIELD
	TANY
	TSTRING
	TUNSAFEPTR

	// pseudo-types for literals
	TIDEAL
	TNIL
	TBLANK

	// pseudo-type for frame layout
	TFUNCARGS
	TCHANARGS
	TINTERMETH

	NTYPE
)

const (
	CTxxx = iota

	CTINT
	CTRUNE
	CTFLT
	CTCPLX
	CTSTR
	CTBOOL
	CTNIL
)

const (
	/* types of channel */
	/* must match ../../pkg/nreflect/type.go:/Chandir */
	Cxxx  = 0
	Crecv = 1 << 0
	Csend = 1 << 1
	Cboth = Crecv | Csend
)

const (
	Pxxx      = uint8(iota)
	PEXTERN   // global variable
	PAUTO     // local variables
	PPARAM    // input arguments
	PPARAMOUT // output results
	PPARAMREF // closure variable reference
	PFUNC     // global function

	PDISCARD // discard during parse of duplicate import

	PHEAP = uint8(1 << 7) // an extra bit to identify an escaped variable
)

const (
	Etop      = 1 << 1 // evaluated at statement level
	Erv       = 1 << 2 // evaluated in value context
	Etype     = 1 << 3
	Ecall     = 1 << 4  // call-only expressions are ok
	Efnstruct = 1 << 5  // multivalue function returns are ok
	Eiota     = 1 << 6  // iota is ok
	Easgn     = 1 << 7  // assigning to expression
	Eindir    = 1 << 8  // indirecting through expression
	Eaddr     = 1 << 9  // taking address of expression
	Eproc     = 1 << 10 // inside a go statement
	Ecomplit  = 1 << 11 // type in composite literal
)

const (
	// Pseudo-op, like TEXT, GLOBL, TYPE, PCDATA, FUNCDATA.
	Pseudo = 1 << 1

	// There's nothing to say about the instruction,
	// but it's still okay to see.
	OK = 1 << 2

	// Size of right-side write, or right-side read if no write.
	SizeB = 1 << 3
	SizeW = 1 << 4
	SizeL = 1 << 5
	SizeQ = 1 << 6
	SizeF = 1 << 7
	SizeD = 1 << 8

	// Left side (Prog.from): address taken, read, write.
	LeftAddr  = 1 << 9
	LeftRead  = 1 << 10
	LeftWrite = 1 << 11

	// Register in middle (Prog.reg); only ever read. (arm, ppc64)
	RegRead    = 1 << 12
	CanRegRead = 1 << 13

	// Right side (Prog.to): address taken, read, write.
	RightAddr  = 1 << 14
	RightRead  = 1 << 15
	RightWrite = 1 << 16

	// Instruction kinds
	Move  = 1 << 17 // straight move
	Conv  = 1 << 18 // size conversion
	Cjmp  = 1 << 19 // conditional jump
	Break = 1 << 20 // breaks control flow (no fallthrough)
	Call  = 1 << 21 // function call
	Jump  = 1 << 22 // jump
	Skip  = 1 << 23 // data instruction

	// Set, use, or kill of carry bit.
	// Kill means we never look at the carry bit after this kind of instruction.
	SetCarry  = 1 << 24
	UseCarry  = 1 << 25
	KillCarry = 1 << 26

	// Special cases for register use. (amd64, 386)
	ShiftCX  = 1 << 27 // possible shift by CX
	ImulAXDX = 1 << 28 // possible multiply into DX:AX

	// Instruction updates whichever of from/to is type D_OREG. (ppc64)
	PostInc = 1 << 29
)

const (
	UNVISITED = 0
	VISITED   = 1
)

const (
	H0 = 2166136261
	Hp = 16777619
)

const (
	BUCKETSIZE = 8
	MAXKEYSIZE = 128
	MAXVALSIZE = 128
)

const (
	BITS = 3
	NVAR = BITS * 64
)

const (
	CLOAD = 5 // cost of load
	CREF  = 5 // cost of reference if not registerized
	LOOP  = 3 // loop execution count (applied in popt.go)
)

const (
	InitNotStarted = 0
	InitDone       = 1
	InitPending    = 2
)

const (
	MODEDYNAM = 1
	MODECONST = 2
)

const (
	OXXX = iota

	// names
	ONAME    // var, const or func name
	ONONAME  // unnamed arg or return value: f(int, string) (int, error) { etc }
	OTYPE    // type name
	OPACK    // import
	OLITERAL // literal

	// expressions
	OADD             // Left + Right
	OSUB             // Left - Right
	OOR              // Left | Right
	OXOR             // Left ^ Right
	OADDSTR          // Left + Right (string addition)
	OADDR            // &Left
	OANDAND          // Left && Right
	OAPPEND          // append(List)
	OARRAYBYTESTR    // Type(Left) (Type is string, Left is a []byte)
	OARRAYBYTESTRTMP // Type(Left) (Type is string, Left is a []byte, ephemeral)
	OARRAYRUNESTR    // Type(Left) (Type is string, Left is a []rune)
	OSTRARRAYBYTE    // Type(Left) (Type is []byte, Left is a string)
	OSTRARRAYBYTETMP // Type(Left) (Type is []byte, Left is a string, ephemeral)
	OSTRARRAYRUNE    // Type(Left) (Type is []rune, Left is a string)
	OAS              // Left = Right or (if Colas=true) Left := Right
	OAS2             // List = Rlist (x, y, z = a, b, c)
	OAS2FUNC         // List = Rlist (x, y = f())
	OAS2RECV         // List = Rlist (x, ok = <-c)
	OAS2MAPR         // List = Rlist (x, ok = m["foo"])
	OAS2DOTTYPE      // List = Rlist (x, ok = I.(int))
	OASOP            // Left Etype= Right (x += y)
	OASWB            // Left = Right (with write barrier)
	OCALL            // Left(List) (function call, method call or type conversion)
	OCALLFUNC        // Left(List) (function call f(args))
	OCALLMETH        // Left(List) (direct method call x.Method(args))
	OCALLINTER       // Left(List) (interface method call x.Method(args))
	OCALLPART        // Left.Right (method expression x.Method, not called)
	OCAP             // cap(Left)
	OCLOSE           // close(Left)
	OCLOSURE         // func Type { Body } (func literal)
	OCMPIFACE        // Left Etype Right (interface comparison, x == y or x != y)
	OCMPSTR          // Left Etype Right (string comparison, x == y, x < y, etc)
	OCOMPLIT         // Right{List} (composite literal, not yet lowered to specific form)
	OMAPLIT          // Type{List} (composite literal, Type is map)
	OSTRUCTLIT       // Type{List} (composite literal, Type is struct)
	OARRAYLIT        // Type{List} (composite literal, Type is array or slice)
	OPTRLIT          // &Left (left is composite literal)
	OCONV            // Type(Left) (type conversion)
	OCONVIFACE       // Type(Left) (type conversion, to interface)
	OCONVNOP         // Type(Left) (type conversion, no effect)
	OCOPY            // copy(Left, Right)
	ODCL             // var Left (declares Left of type Left.Type)

	// Used during parsing but don't last.
	ODCLFUNC  // func f() or func (r) f()
	ODCLFIELD // struct field, interface field, or func/method argument/return value.
	ODCLCONST // const pi = 3.14
	ODCLTYPE  // type Int int

	ODELETE    // delete(Left, Right)
	ODOT       // Left.Right (Left is of struct type)
	ODOTPTR    // Left.Right (Left is of pointer to struct type)
	ODOTMETH   // Left.Right (Left is non-interface, Right is method name)
	ODOTINTER  // Left.Right (Left is interface, Right is method name)
	OXDOT      // Left.Right (before rewrite to one of the preceding)
	ODOTTYPE   // Left.Right or Left.Type (.Right during parsing, .Type once resolved)
	ODOTTYPE2  // Left.Right or Left.Type (.Right during parsing, .Type once resolved; on rhs of OAS2DOTTYPE)
	OEQ        // Left == Right
	ONE        // Left != Right
	OLT        // Left < Right
	OLE        // Left <= Right
	OGE        // Left >= Right
	OGT        // Left > Right
	OIND       // *Left
	OINDEX     // Left[Right] (index of array or slice)
	OINDEXMAP  // Left[Right] (index of map)
	OKEY       // Left:Right (key:value in struct/array/map literal, or slice index pair)
	OPARAM     // variant of ONAME for on-stack copy of a parameter or return value that escapes.
	OLEN       // len(Left)
	OMAKE      // make(List) (before type checking converts to one of the following)
	OMAKECHAN  // make(Type, Left) (type is chan)
	OMAKEMAP   // make(Type, Left) (type is map)
	OMAKESLICE // make(Type, Left, Right) (type is slice)
	OMUL       // Left * Right
	ODIV       // Left / Right
	OMOD       // Left % Right
	OLSH       // Left << Right
	ORSH       // Left >> Right
	OAND       // Left & Right
	OANDNOT    // Left &^ Right
	ONEW       // new(Left)
	ONOT       // !Left
	OCOM       // ^Left
	OPLUS      // +Left
	OMINUS     // -Left
	OOROR      // Left || Right
	OPANIC     // panic(Left)
	OPRINT     // print(List)
	OPRINTN    // println(List)
	OPAREN     // (Left)
	OSEND      // Left <- Right
	OSLICE     // Left[Right.Left : Right.Right] (Left is untypechecked or slice; Right.Op==OKEY)
	OSLICEARR  // Left[Right.Left : Right.Right] (Left is array)
	OSLICESTR  // Left[Right.Left : Right.Right] (Left is string)
	OSLICE3    // Left[R.Left : R.R.Left : R.R.R] (R=Right; Left is untypedchecked or slice; R.Op and R.R.Op==OKEY)
	OSLICE3ARR // Left[R.Left : R.R.Left : R.R.R] (R=Right; Left is array; R.Op and R.R.Op==OKEY)
	ORECOVER   // recover()
	ORECV      // <-Left
	ORUNESTR   // Type(Left) (Type is string, Left is rune)
	OSELRECV   // Left = <-Right.Left: (appears as .Left of OCASE; Right.Op == ORECV)
	OSELRECV2  // List = <-Right.Left: (apperas as .Left of OCASE; count(List) == 2, Right.Op == ORECV)
	OIOTA      // iota
	OREAL      // real(Left)
	OIMAG      // imag(Left)
	OCOMPLEX   // complex(Left, Right)

	// statements
	OBLOCK    // { List } (block of code)
	OBREAK    // break
	OCASE     // case List: Nbody (select case after processing; List==nil means default)
	OXCASE    // case List: Nbody (select case before processing; List==nil means default)
	OCONTINUE // continue
	ODEFER    // defer Left (Left must be call)
	OEMPTY    // no-op (empty statement)
	OFALL     // fallthrough (after processing)
	OXFALL    // fallthrough (before processing)
	OFOR      // for Ninit; Left; Right { Nbody }
	OGOTO     // goto Left
	OIF       // if Ninit; Left { Nbody } else { Rlist }
	OLABEL    // Left:
	OPROC     // go Left (Left must be call)
	ORANGE    // for List = range Right { Nbody }
	ORETURN   // return List
	OSELECT   // select { List } (List is list of OXCASE or OCASE)
	OSWITCH   // switch Ninit; Left { List } (List is a list of OXCASE or OCASE)
	OTYPESW   // List = Left.(type) (appears as .Left of OSWITCH)

	// types
	OTCHAN   // chan int
	OTMAP    // map[string]int
	OTSTRUCT // struct{}
	OTINTER  // interface{}
	OTFUNC   // func()
	OTARRAY  // []int, [8]int, [N]int or [...]int

	// misc
	ODDD        // func f(args ...int) or f(l...) or var a = [...]int{0, 1, 2}.
	ODDDARG     // func f(args ...int), introduced by escape analysis.
	OINLCALL    // intermediary representation of an inlined call.
	OEFACE      // itable and data words of an empty-interface value.
	OITAB       // itable word of an interface value.
	OSPTR       // base pointer of a slice or string.
	OCLOSUREVAR // variable reference at beginning of closure function
	OCFUNC      // reference to c function pointer (not go func value)
	OCHECKNIL   // emit code to ensure pointer/interface not nil
	OVARKILL    // variable is dead

	// thearch-specific registers
	OREGISTER // a register, such as AX.
	OINDREG   // offset plus indirect of a register, such as 8(SP).

	// arch-specific opcodes
	OCMP    // compare: ACMP.
	ODEC    // decrement: ADEC.
	OINC    // increment: AINC.
	OEXTEND // extend: ACWD/ACDQ/ACQO.
	OHMUL   // high mul: AMUL/AIMUL for unsigned/signed (OMUL uses AIMUL for both).
	OLROT   // left rotate: AROL.
	ORROTC  // right rotate-carry: ARCR.
	ORETJMP // return to other function
	OPS     // compare parity set (for x86 NaN check)
	OPC     // compare parity clear (for x86 NaN check)
	OSQRT   // sqrt(float64), on systems that have hw support
	OGETG   // runtime.getg() (read g pointer)

	OEND
)

const (
	ArhdrSize = 60
)

const (
	EOF = -1
)

const LANDAND = 57376

const LANDNOT = 57377

const LASOP = 57347

const LBODY = 57378

const LBREAK = 57349

const LCASE = 57350

const LCHAN = 57351

const LCOLAS = 57348

const LCOMM = 57379

const LCONST = 57352

const LCONTINUE = 57353

const LDDD = 57354

const LDEC = 57380

const LDEFAULT = 57355

const LDEFER = 57356

const LELSE = 57357

const LEQ = 57381

const LFALL = 57358

const LFOR = 57359

const LFUNC = 57360

const LGE = 57382

const LGO = 57361

const LGOTO = 57362

const LGT = 57383

const LIF = 57363

const LIGNORE = 57384

const LIMPORT = 57364

const LINC = 57385

const LINTERFACE = 57365

const LLE = 57386

const LLITERAL = 57346

const LLSH = 57387

const LLT = 57388

const LMAP = 57366

const LNAME = 57367

const LNE = 57389

const LOROR = 57390

const LPACKAGE = 57368

const LRANGE = 57369

const LRETURN = 57370

const LRSH = 57391

const LSELECT = 57371

const LSTRUCT = 57372

const LSWITCH = 57373

const LTYPE = 57374

const LVAR = 57375

const MaxFlowProg = 50000

const MaxRgn = 6000

const (
	MinLevel = -2
)

const NotPackage = 57392

const NotParen = 57393

const PreferToRightParen = 57394