// recursion. This is all runtime packages, plus those that support the
	// sanitizers.
	NoInstrument bool

	// NoRaceFunc indicates functions in this package should not get
	// racefuncenter/racefuncexit instrumentation Memory accesses in these
	// packages are either uninteresting or will cause false positives.
	NoRaceFunc bool

	// AllowAsmABI indicates that assembly in this package is allowed to use ABI

var racedataend uintptr

// start/end of heap for race_amd64.s
var racearenastart uintptr
var racearenaend uintptr

func racefuncenter(callpc uintptr)
func racefuncenterfp(fp uintptr)
func racefuncexit()
func raceread(addr uintptr)
func racewrite(addr uintptr)
func racereadrange(addr, size uintptr)
func racewriterange(addr, size uintptr)
func racereadrangepc1(addr, size, pc uintptr)

	{"runtime.uint64tofloat32", 1},
	{"runtime.uint32tofloat64", 1},
	{"runtime.complex128div", 1},
	{"runtime.getcallerpc", 1},
	{"runtime.getcallersp", 1},
	{"runtime.racefuncenter", 1},
	{"runtime.racefuncexit", 1},
	{"runtime.raceread", 1},
	{"runtime.racewrite", 1},
	{"runtime.racereadrange", 1},
	{"runtime.racewriterange", 1},
	{"runtime.msanread", 1},
	{"runtime.msanwrite", 1},
	{"runtime.msanmove", 1},

func complex128div(num complex128, den complex128) (quo complex128)

func getcallerpc() uintptr
func getcallersp() uintptr

// race detection
func racefuncenter(uintptr)
func racefuncexit()
func raceread(uintptr)
func racewrite(uintptr)
func racereadrange(addr, size uintptr)
func racewriterange(addr, size uintptr)

// memory sanitizer
func msanread(addr, size uintptr)

	{"uint64tofloat32", funcTag, 140},
	{"uint32tofloat64", funcTag, 141},
	{"complex128div", funcTag, 142},
	{"getcallerpc", funcTag, 143},
	{"getcallersp", funcTag, 143},
	{"racefuncenter", funcTag, 31},
	{"racefuncexit", funcTag, 9},
	{"raceread", funcTag, 31},
	{"racewrite", funcTag, 31},
	{"racereadrange", funcTag, 144},
	{"racewriterange", funcTag, 144},
	{"msanread", funcTag, 144},
	{"msanwrite", funcTag, 144},

		return false
	}
	if !isSameCall(sym, "runtime.racefuncenter") && !isSameCall(sym, "runtime.racefuncexit") {
		return false
	}
	for _, b := range f.Blocks {
		for _, v := range b.Values {
			switch v.Op {
			case OpStaticCall, OpStaticLECall:
				// Check for racefuncenter will encounter racefuncexit and vice versa.
				// Allow calls to panic*
				s := v.Aux.(*AuxCall).Fn.String()
				switch s {

	ir.Syms.Panicshift = typecheck.LookupRuntimeFunc("panicshift")
	ir.Syms.Racefuncenter = typecheck.LookupRuntimeFunc("racefuncenter")
	ir.Syms.Racefuncexit = typecheck.LookupRuntimeFunc("racefuncexit")
	ir.Syms.Raceread = typecheck.LookupRuntimeFunc("raceread")
	ir.Syms.Racereadrange = typecheck.LookupRuntimeFunc("racereadrange")
	ir.Syms.Racewrite = typecheck.LookupRuntimeFunc("racewrite")