}
	return
}

// slicebytetostringtmp returns a "string" referring to the actual []byte bytes.
//
// Callers need to ensure that the returned string will not be used after
// the calling goroutine modifies the original slice or synchronizes with
// another goroutine.
//
// The function is only called when instrumenting
// and otherwise intrinsified by the compiler.
//
// Some internal compiler optimizations use this function.

		after[p.ID] = []*Block{b}
		for {
			nextIdx := idToIdx[b.ID] + 1
			if nextIdx >= len(f.Blocks) { // reached end of function (maybe impossible?)
				break
			}
			nextb := f.Blocks[nextIdx]
			if nextb == p { // original loop predecessor is next
				break
			}
			if loopnest.b2l[nextb.ID] == loop {
				after[p.ID] = append(after[p.ID], nextb)
			}
			b = nextb
		}

	fmt.Fprintf(h, "input %q\n", b.fileHash(input))

	return h.Sum()
}

// pgoActor implements the Actor interface for preprocessing PGO profiles.
type pgoActor struct {
	// input is the path to the original pprof profile.
	input string
}

func (p *pgoActor) Act(b *Builder, ctx context.Context, a *Action) error {
	if b.useCache(a, b.pgoActionID(p.input), a.Target, !b.IsCmdList) || b.IsCmdList {
		return nil
	}

}

// safeExpr returns a safe version of n.
// The definition of safe is that n can appear multiple times
// without violating the semantics of the original program,
// and that assigning to the safe version has the same effect
// as assigning to the original n.
//
// The intended use is to apply to x when rewriting x += y into x = x + y.
func (o *orderState) safeExpr(n ir.Node) ir.Node {
	switch n.Op() {

// aligned appropriately for the gcc ABI.
// See cgocall.go for more details.
TEXT ·asmcgocall(SB),NOSPLIT,$0-20
	MOVD	fn+0(FP), R1
	MOVD	arg+8(FP), R0

	MOVD	RSP, R2		// save original stack pointer
	CBZ	g, nosave
	MOVD	g, R4

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already

// GoSyscallStart+GoSyscallEnd, unless we observe a GoSysBlock, in which case we
// emit a GoSyscallStart+GoSyscallEndBlocked pair with the correct duration
// (i.e. starting at the original GoSyscall).
//
// The resulting trace treats the old trace as a single, large generation,
// sharing a single evTable for all events.
//
// We use a new (compared to what was used for 'go tool trace' in earlier

//
// Given a value of one of Go's predeclared string, bool, or
// (non-complex) numeric types, AnyValue returns a Value of kind
// [KindString], [KindBool], [KindUint64], [KindInt64], or [KindFloat64].
// The width of the original numeric type is not preserved.
//
// Given a [time.Time] or [time.Duration] value, AnyValue returns a Value of kind
// [KindTime] or [KindDuration]. The monotonic time is not preserved.
//

TEXT ·asmcgocall(SB),NOSPLIT,$0-20
	// R2 = argc; R3 = argv; R11 = temp; R13 = g; R15 = stack pointer
	// C TLS base pointer in AR0:AR1
	MOVD	fn+0(FP), R3
	MOVD	arg+8(FP), R4

	MOVD	R15, R2		// save original stack pointer
	MOVD	g, R5

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already

		// to create duplicate ABI wrappers.
		//
		// However, if it's given a linkname for exporting to
		// C, then we don't make ABI wrappers because the cgo
		// tool wants the original definition.
		hasBody := len(fn.Body) != 0
		if sym.Linkname != "" && (hasBody || hasDefABI) && len(cgoExport) == 0 {
			fn.ABIRefs |= obj.ABISetCallable
		}

		// Double check that cgo-exported symbols don't get

	// Display options.
	"relative_percentages": helpText(
		"Show percentages relative to focused subgraph",
		"If unset, percentages are relative to full graph before focusing",
		"to facilitate comparison with original graph."),
	"unit": helpText(
		"Measurement units to display",
		"Scale the sample values to this unit.",
		"For time-based profiles, use seconds, milliseconds, nanoseconds, etc.",