// BUG(r): There is no mechanism for full case folding, that is, for
// characters that involve multiple runes in the input or output.

// Indices into the Delta arrays inside CaseRanges for case mapping.
const (
	UpperCase = iota
	LowerCase
	TitleCase
	MaxCase
)

type d [MaxCase]rune // to make the CaseRanges text shorter

// If the Delta field of a [CaseRange] is UpperLower, it means

	// _Gscanwaiting -> _Gscanrunnable are actually okay because
	// they don't affect stack ownership.

	// _Gidle means this goroutine was just allocated and has not
	// yet been initialized.
	_Gidle = iota // 0

	// _Grunnable means this goroutine is on a run queue. It is
	// not currently executing user code. The stack is not owned.
	_Grunnable // 1

	// _Grunning means this goroutine may execute user code. The

	// i.e. struct fields and array elements, even with non-constant
	// indices: x is non-nil iff x.a.b[i].c is.

	type walkState int
	const (
		Work     walkState = iota // process nil checks and traverse to dominees
		ClearPtr                  // forget the fact that ptr is nil
	)

	type bp struct {
		block *Block // block, or nil in ClearPtr state

// the interface value instead of requiring an allocation.

// A Reg is a single register.
// The zero Reg value has no name but indicates “no register.”
type Reg uint8

const (
	_ Reg = iota

	// 8-bit
	AL
	CL
	DL
	BL
	AH
	CH
	DH
	BH
	SPB
	BPB
	SIB
	DIB
	R8B
	R9B
	R10B
	R11B
	R12B
	R13B
	R14B
	R15B

	// 16-bit

// The _offset and _postindex suffixes force the given addressing mode.
// The rest should be somewhat self-explanatory, at least given
// the decodeArg function.
type instArg uint8

const (
	_ instArg = iota
	arg_APSR
	arg_FPSCR
	arg_Dn_half
	arg_R1_0
	arg_R1_12
	arg_R2_0
	arg_R2_12
	arg_R_0
	arg_R_12
	arg_R_12_nzcv
	arg_R_16
	arg_R_16_WB
	arg_R_8
	arg_R_rotate
	arg_R_shift_R

//
// Note that traceBlockReasons should not be compared, since reasons that are
// distinct by name may *not* be distinct by value.
type traceBlockReason uint8

const (
	traceBlockGeneric traceBlockReason = iota
	traceBlockForever
	traceBlockNet
	traceBlockSelect
	traceBlockCondWait
	traceBlockSync
	traceBlockChanSend
	traceBlockChanRecv
	traceBlockGCMarkAssist
	traceBlockGCSweep
	traceBlockSystemGoroutine

	}
	if mapfast(t) == mapslow {
		return typecheck.LookupRuntime(name, t.Key(), t.Elem(), t.Key())
	}
	return typecheck.LookupRuntime(name, t.Key(), t.Elem())
}

const (
	mapslow = iota
	mapfast32
	mapfast32ptr
	mapfast64
	mapfast64ptr
	mapfaststr
	nmapfast
)

type mapnames [nmapfast]string

func mkmapnames(base string, ptr string) mapnames {

// It is used to identify whether a flag appears;
// the standard boolean flag cannot
// distinguish missing from unset.
// It also satisfies flag.Value.
type triState int

const (
	unset triState = iota
	setTrue
	setFalse
)

func triStateFlag(name string, value triState, usage string) *triState {
	flag.Var(&value, name, usage)
	return &value
}

	fin     [(_FinBlockSize - 2*goarch.PtrSize - 2*4) / unsafe.Sizeof(finalizer{})]finalizer
}

var fingStatus atomic.Uint32

// finalizer goroutine status.
const (
	fingUninitialized uint32 = iota
	fingCreated       uint32 = 1 << (iota - 1)
	fingRunningFinalizer
	fingWait
	fingWake
)

var finlock mutex  // protects the following variables
var fing *g        // goroutine that runs finalizers

package ssa

import (
	"cmd/compile/internal/base"
	"cmd/compile/internal/types"
	"fmt"
)

type indVarFlags uint8

const (
	indVarMinExc    indVarFlags = 1 << iota // minimum value is exclusive (default: inclusive)
	indVarMaxInc                            // maximum value is inclusive (default: exclusive)