source := filepath.Join("testdata", "fma.go")
	output := filepath.Join(tmpdir, "fma.exe")
	cmd := testenv.Command(t, gocmd, "build", "-o", output, source)
	// The hash-dependence on file path name is dodged by specifying "all hashes ending in 1" plus "all hashes ending in 0"
	// i.e., all hashes.  This will print all the FMAs; this test is only interested in one of them (that should appear near the end).

// position being filename:1:1.
func NewFileBase(filename string) *PosBase {
	return NewTrimmedFileBase(filename, false)
}

// NewTrimmedFileBase is like NewFileBase, but allows specifying Trimmed.
func NewTrimmedFileBase(filename string, trimmed bool) *PosBase {
	base := &PosBase{MakePos(nil, linebase, colbase), filename, linebase, colbase, trimmed}
	base.pos.base = base
	return base
}

//		Flags that cgo will pass to the compiler when compiling
//		C code.
//	CGO_CFLAGS_ALLOW
//		A regular expression specifying additional flags to allow
//		to appear in #cgo CFLAGS source code directives.
//		Does not apply to the CGO_CFLAGS environment variable.
//	CGO_CFLAGS_DISALLOW
//		A regular expression specifying flags that must be disallowed
//		from appearing in #cgo CFLAGS source code directives.

		cfg.NoInlines = false // Need inline info to support call expansion
	case "peek":
		trim = false
	case "list":
		trim = false
		cfg.Granularity = "lines"
		// Do not force 'noinlines' to be false so that specifying
		// "-list foo -noinlines" is supported and works as expected.
	case "text", "top", "topproto":
		if cfg.NodeCount == -1 {
			cfg.NodeCount = 0
		}
	default:
		if cfg.NodeCount == -1 {

		Flags that cgo will pass to the compiler when compiling
		C code.
	CGO_CFLAGS_ALLOW
		A regular expression specifying additional flags to allow
		to appear in #cgo CFLAGS source code directives.
		Does not apply to the CGO_CFLAGS environment variable.
	CGO_CFLAGS_DISALLOW
		A regular expression specifying flags that must be disallowed
		from appearing in #cgo CFLAGS source code directives.

new inputs are found that provide the same coverage. These files are
distinct from those stored in testdata directory; clean does not remove
those files.

For more about build flags, see 'go help build'.

For more about specifying packages, see 'go help packages'.
	`,
}

var (
	cleanI         bool // clean -i flag
	cleanR         bool // clean -r flag
	cleanCache     bool // clean -cache flag
	cleanFuzzcache bool // clean -fuzzcache flag

	// a MultiplePackageError on an otherwise valid package: the package could
	// have different names for GOOS=windows and GOOS=mac for example. On the
	// other hand if there's a NoGoError, the package might have source files
	// specifying "//go:build ignore" those packages should be skipped because
	// embeds from ignored files can't be used.
	// TODO(#42504): Find a better way to avoid errors from ImportDir. We'll

		} else {
			tw.hdr.Typeflag = TypeReg
		}
	}

	// Round ModTime and ignore AccessTime and ChangeTime unless
	// the format is explicitly chosen.
	// This ensures nominal usage of WriteHeader (without specifying the format)
	// does not always result in the PAX format being chosen, which
	// causes a 1KiB increase to every header.
	if tw.hdr.Format == FormatUnknown {
		tw.hdr.ModTime = tw.hdr.ModTime.Round(time.Second)

// input 'example.com/foo@v0.1.0' could syntactically refer to the variant of
// the package loaded from either module! (See mod_get_ambiguous_pkg.txt.)
// If the argument is ambiguous, the user can often disambiguate by specifying
// explicit versions for *all* of the potential module paths involved.

import (
	"context"
	"errors"
	"fmt"
	"os"
	"path/filepath"
	"runtime"
	"sort"
	"strconv"
	"strings"
	"sync"

//			reg = reg (REG_*)
//
//	x(PC)
//		Encoding:
//			type = TYPE_BRANCH
//			val = Prog* reference OR ELSE offset = target pc (branch takes priority)
//
//	$±x-±y
//		Final argument to TEXT, specifying local frame size x and argument size y.
//		In this form, x and y are integer literals only, not arbitrary expressions.
//		This avoids parsing ambiguities due to the use of - as a separator.
//		The ± are optional.