p := s.Prog(loadByType(t))
	p.From.Type = obj.TYPE_MEM
	p.From.Name = obj.NAME_AUTO
	p.From.Sym = n.Linksym()
	p.From.Offset = n.FrameOffset() + off
	p.To.Type = obj.TYPE_REG
	p.To.Reg = reg
	return p
}

func spillArgReg(pp *objw.Progs, p *obj.Prog, f *ssa.Func, t *types.Type, reg int16, n *ir.Name, off int64) *obj.Prog {

				// lowering, or unnamed params ("_").
				v.ChildIndex = int32(synthCount)
				synthCount++
			}
		}
	}

	// Make a second pass through the progs to compute PC ranges for
	// the various inlined calls.
	start := int64(-1)
	curii := -1
	var prevp *obj.Prog
	for p := fnsym.Func().Text; p != nil; prevp, p = p, p.Link {
		if prevp != nil && p.Pos == prevp.Pos {
			continue
		}
		ii := posInlIndex(p.Pos)

				prog.Reg = p.getRegister(prog, op, &a[2])
				prog.To = a[3]
				break
			}
			if arch.IsARMMULA(op) {
				// All must be registers.
				p.getRegister(prog, op, &a[0])
				r1 := p.getRegister(prog, op, &a[1])
				r2 := p.getRegister(prog, op, &a[2])
				p.getRegister(prog, op, &a[3])
				prog.From = a[0]
				prog.To = a[3]
				prog.To.Type = obj.TYPE_REGREG2
				prog.To.Offset = int64(r2)
				prog.Reg = r1
				break

// the backtracker using prog.
func maxBitStateLen(prog *syntax.Prog) int {
	if !shouldBacktrack(prog) {
		return 0
	}
	return maxBacktrackVector / len(prog.Inst)
}

// shouldBacktrack reports whether the program is too
// long for the backtracker to run.
func shouldBacktrack(prog *syntax.Prog) bool {
	return len(prog.Inst) <= maxBacktrackProg
}

	//
	// Unfortunately, it provides no means of escaping interior quotation marks
	// within that program name, and we have no way to report them here.
	prog := args[0]
	mustQuote := len(prog) == 0
	for i := 0; i < len(prog); i++ {
		c := prog[i]
		if c <= ' ' || (c == '"' && i == 0) {
			// Force quotes for not only the ASCII space and tab as described in the
			// MSDN article, but also ASCII control characters.

		sc += ".U"
	}
	return sc
}

func (p *Prog) String() string {
	if p == nil {
		return "<nil Prog>"
	}
	if p.Ctxt == nil {
		return "<Prog without ctxt>"
	}
	return fmt.Sprintf("%.5d (%v)\t%s", p.Pc, p.Line(), p.InstructionString())
}

func (p *Prog) InnermostString(w io.Writer) {
	if p == nil {
		io.WriteString(w, "<nil Prog>")
		return
	}
	if p.Ctxt == nil {

	t.Parallel()

	mustHaveDWARF(t)

	const prog = `package main
%s
func main() {}
`
	tests := []struct {
		name string
		prog string
		file string
		line int64
	}{
		{
			name: "normal",
			prog: fmt.Sprintf(prog, ""),
			file: "test.go",
			line: 3,
		},
		{
			name: "line-directive",
			prog: fmt.Sprintf(prog, "//line /foobar.go:200"),
			file: "foobar.go",

func findProgReport(meta map[string]string, report *telemetry.Report) *telemetry.ProgramReport {
	for _, prog := range report.Programs {
		if prog.Program == meta["Program"] && prog.Version == meta["Version"] &&
			prog.GoVersion == meta["GoVersion"] && prog.GOOS == meta["GOOS"] &&
			prog.GOARCH == meta["GOARCH"] {
			return prog
		}
	}
	prog := telemetry.ProgramReport{
		Program:   meta["Program"],
		Version:   meta["Version"],

				for _, s := range ef.Sections {
					if s.Flags&elf.SHF_ALLOC == 0 {
						ret += s.Size
					}
				}
				// also skip gaps between PT_LOAD segments
				var prev *elf.Prog
				for _, seg := range ef.Progs {
					if seg.Type != elf.PT_LOAD {
						continue
					}
					if prev != nil {
						ret += seg.Off - prev.Off - prev.Filesz
					}
					prev = seg
				}
				return ret
			}

	"path/filepath"
	"time"
)

const prog = `
package main

import _ "os/signal"

func main() {
  c := make(chan int)
  c <- 1
}
`

func main() {
	dir, err := ioutil.TempDir("", "21576")
	if err != nil {
		log.Fatal(err)
	}
	defer os.RemoveAll(dir)

	file := filepath.Join(dir, "main.go")
	if err := ioutil.WriteFile(file, []byte(prog), 0655); err != nil {
		log.Fatalf("Write error %v", err)