// enable and report. If a pattern is prefixed by a “!”, the meaning
// changes: the pattern specifies the changes to DISABLE and report. This
// mode of operation is needed when a program passes with all changes
// enabled but fails with no changes enabled. In this case, bisect
// searches for minimal sets of changes to disable.
// Put another way, the leading “!” inverts the result from [Matcher.ShouldEnable]

	// Single live memory checks.
	// These checks only work if there are no memory copies.
	// (Memory copies introduce ambiguity about which mem value is really live.
	// probably fixable, but it's easier to avoid the problem.)
	// For the same reason, disable this check if some memory ops are unused.
	for _, b := range f.Blocks {
		for _, v := range b.Values {
			if (v.Op == OpCopy || v.Uses == 0) && v.Type.IsMemory() {
				return
			}

//     THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
//     PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design,
//     Inc. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
//     EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
//     PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

}

func (f *zeroPanicker) String() string {
	if !f.dontPanic {
		panic("panic!")
	}
	return f.v
}

const defaultOutput = `  -A	for bootstrapping, allow 'any' type
  -Alongflagname
    	disable bounds checking
  -C	a boolean defaulting to true (default true)
  -D path
    	set relative path for local imports
  -E string
    	issue 23543 (default "0")
  -F number
    	a non-zero number (default 2.7)

		throw("pthread_attr_getstack")
	}
	mp.g0.stack.lo = mp.g0.stack.hi - uintptr(size)
	if pthread_attr_setdetachstate(&attr, _PTHREAD_CREATE_DETACHED) != 0 {
		throw("pthread_attr_setdetachstate")
	}

	// Disable signals during create, so that the new thread starts
	// with signals disabled. It will enable them in minit.
	sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
	ret = retryOnEAGAIN(func() int32 {

	os.Setenv("GOARCH", "")
	os.Setenv("GOHOSTARCH", "")

	// Run Go bootstrap to build binaries.
	// Use the math_big_pure_go build tag to disable the assembly in math/big
	// which may contain unsupported instructions.
	// Use the purego build tag to disable other assembly code,
	// such as in cmd/internal/notsha256.
	cmd := []string{
		pathf("%s/bin/go", goroot_bootstrap),
		"install",

	// Replace x.go:19[/tmp/.../x.cgo1.go:18] with x.go:19.
	// Replace *[100]_Ctype_foo with *[100]C.foo.
	// If we're using -x, assume we're debugging and want the full dump, so disable the rewrite.
	if !cfg.BuildX && cgoLine.MatchString(out) {
		out = cgoLine.ReplaceAllString(out, "")
		out = cgoTypeSigRe.ReplaceAllString(out, "C.")
	}

}

// IsRoot returns true if t is equal to language "und".
func (t Tag) IsRoot() bool {
	return compact.Tag(t).IsRoot()
}

// CanonType can be used to enable or disable various types of canonicalization.
type CanonType int

const (
	// Replace deprecated base languages with their preferred replacements.
	DeprecatedBase CanonType = 1 << iota

		}
	}
}

// setProcessCPUProfilerTimer is called when the profiling timer changes.
// It is called with prof.signalLock held. hz is the new timer, and is 0 if
// profiling is being disabled. Enable or disable the signal as
// required for -buildmode=c-archive.
func setProcessCPUProfilerTimer(hz int32) {
	if hz != 0 {
		// Enable the Go signal handler if not enabled.
		if atomic.Cas(&handlingSig[_SIGPROF], 0, 1) {

			return "", fmt.Errorf("no path for non-exported %v", obj)
		}
		return Path(obj.Name()), nil
	}

	// 3. Not a package-level object.
	//    Reject obviously non-viable cases.
	switch obj := obj.(type) {
	case *types.TypeName:
		if _, ok := aliases.Unalias(obj.Type()).(*types.TypeParam); !ok {
			// With the exception of type parameters, only package-level type names
			// have a path.