var hwflag = flag.Bool("hw", false, "Panic on warnings (for stack trace)")
var indirsflag = flag.String("i", "", "Input dirs to examine (comma separated)")
var pkgpatflag = flag.String("pkg", "", "Restrict output to package(s) matching specified package pattern.")
var cpuprofileflag = flag.String("cpuprofile", "", "Write CPU profile to specified file")
var memprofileflag = flag.String("memprofile", "", "Write memory profile to specified file")

//
// [underlying type]: https://go.dev/ref/spec#Underlying_types.
func (t *TypeParam) Underlying() Type {
	return t.iface()
}

func (t *TypeParam) String() string { return TypeString(t, nil) }

// ----------------------------------------------------------------------------
// Implementation

func (t *TypeParam) cleanup() {
	t.iface()
	t.check = nil
}

// setAlg sets the algorithm type of t to a, if it is of higher
// priority to the current algorithm type.
func (t *Type) setAlg(a AlgKind) {
	if t.alg == AUNK {
		base.Fatalf("setAlg(%v,%s) starting with unknown priority", t, a)
	}
	if algPriority[a] > algPriority[t.alg] {
		t.alg = a
	} else if a != t.alg && algPriority[a] == algPriority[t.alg] {
		base.Fatalf("ambiguous priority %s and %s", a, t.alg)
	}
}

// symbols with names matching the regular expression.
//
// Alternate usage:
//
//	go tool objdump binary start end
//
// In this mode, objdump disassembles the binary starting at the start address and
// stopping at the end address. The start and end addresses are program
// counters written in hexadecimal with optional leading 0x prefix.
// In this mode, objdump prints a sequence of stanzas of the form:

// file, line, column, and byte offset.
type Position struct {
	Line     int // line in input (starting at 1)
	LineRune int // rune in line (starting at 1)
	Byte     int // byte in input (starting at 0)
}

// add returns the position at the end of s, assuming it starts at p.
func (p Position) add(s string) Position {
	p.Byte += len(s)
	if n := strings.Count(s, "\n"); n > 0 {
		p.Line += n

		Srcfile:  filename,
		Units:    f.fn.units,
		Lit:      flit,
	}
	funcId := f.mdb.AddFunc(fd)

	hookWrite := func(cv string, which int, val string) string {
		return fmt.Sprintf("%s[%d] = %s", cv, which, val)
	}
	if *mode == "atomic" {
		hookWrite = func(cv string, which int, val string) string {
			return fmt.Sprintf("%sStoreUint32(&%s[%d], %s)",
				atomicPackagePrefix(), cv, which, val)
		}
	}

	"regexp"
	"testing"
)

type devirtualization struct {
	pos    string
	callee string
}

const profFileName = "devirt.pprof"
const preProfFileName = "devirt.pprof.node_map"

// testPGODevirtualize tests that specific PGO devirtualize rewrites are performed.
func testPGODevirtualize(t *testing.T, dir string, want []devirtualization, pgoProfileName string) {
	testenv.MustHaveGoRun(t)
	t.Parallel()

func (s *Selection) String() string { return SelectionString(s, nil) }

// SelectionString returns the string form of s.
// The Qualifier controls the printing of
// package-level objects, and may be nil.
//
// Examples:
//
//	"field (T) f int"
//	"method (T) f(X) Y"
//	"method expr (T) f(X) Y"
func SelectionString(s *Selection, qf Qualifier) string {
	var k string
	switch s.kind {

	Focus        string  `json:"focus,omitempty"`
	Ignore       string  `json:"ignore,omitempty"`
	PruneFrom    string  `json:"prune_from,omitempty"`
	Hide         string  `json:"hide,omitempty"`
	Show         string  `json:"show,omitempty"`
	ShowFrom     string  `json:"show_from,omitempty"`
	TagFocus     string  `json:"tagfocus,omitempty"`
	TagIgnore    string  `json:"tagignore,omitempty"`

	// false until the block has been processed at least once. This
	// affects how the merge is done; the goal is to maximize sharing
	// and avoid allocation.
	everProcessed bool
}

// A liveSlot is a slot that's live in loc at entry/exit of a block.
type liveSlot struct {
	VarLoc
}

func (ls *liveSlot) String() string {
	return fmt.Sprintf("0x%x.%d.%d", ls.Registers, ls.stackOffsetValue(), int32(ls.StackOffset)&1)
}