largeStackFramesMu.Lock()
		largeStackFrames = append(largeStackFrames, largeStack{locals: f.Frontend().(*ssafn).stksize, args: f.OwnAux.ArgWidth(), pos: fn.Pos()})
		largeStackFramesMu.Unlock()
		return
	}
	pp := objw.NewProgs(fn, worker)
	defer pp.Free()
	genssa(f, pp)
	// Check frame size again.
	// The check above included only the space needed for local variables.

The -testcache flag causes clean to expire all test results in the
go build cache.

The -modcache flag causes clean to remove the entire module
download cache, including unpacked source code of versioned
dependencies.

The -fuzzcache flag causes clean to remove files stored in the Go build
cache for fuzz testing. The fuzzing engine caches files that expand

		return n
	}

	// TODO(rfindley): if n.check is non-nil we can avoid locking here, since
	// type-checking is not concurrent. Evaluate if this is worth doing.
	n.mu.Lock()
	defer n.mu.Unlock()

	if n.state() >= resolved {
		return n
	}

	if n.inst != nil {
		assert(n.underlying == nil) // n is an unresolved instance

}

func (mms *MainModuleSet) Index(m module.Version) *modFileIndex {
	mms.indexMu.Lock()
	defer mms.indexMu.Unlock()
	return mms.indices[m]
}

func (mms *MainModuleSet) SetIndex(m module.Version, index *modFileIndex) {
	mms.indexMu.Lock()
	defer mms.indexMu.Unlock()
	mms.indices[m] = index
}

func (mms *MainModuleSet) ModFile(m module.Version) *modfile.File {
	return mms.modFiles[m]
}

	    calling runtime.SetBlockProfileRate with n.
	    See 'go doc runtime.SetBlockProfileRate'.
	    The profiler aims to sample, on average, one blocking event every
	    n nanoseconds the program spends blocked. By default,
	    if -test.blockprofile is set without this flag, all blocking events
	    are recorded, equivalent to -test.blockprofilerate=1.

	-coverprofile cover.out

// unpackRecv unpacks a receiver type and returns its components: ptr indicates whether
// rtyp is a pointer receiver, rname is the receiver type name, and tparams are its
// type parameters, if any. The type parameters are only unpacked if unpackParams is
// set. If rname is nil, the receiver is unusable (i.e., the source has a bug which we
// cannot easily work around).

			summary, err := goModSummary(m)

			mu.Lock()
			if err == nil {
				mg.g.Require(m, summary.require)
			} else {
				hasError = true
			}
			mu.Unlock()

			return summary, err
		})
	}

	var enqueue func(m module.Version, pruning modPruning)
	enqueue = func(m module.Version, pruning modPruning) {
		if m.Version == "none" {
			return
		}

//
// The -testcache flag causes clean to expire all test results in the
// go build cache.
//
// The -modcache flag causes clean to remove the entire module
// download cache, including unpacked source code of versioned
// dependencies.
//
// The -fuzzcache flag causes clean to remove files stored in the Go build
// cache for fuzz testing. The fuzzing engine caches files that expand

		// This is a remote path.
		var err error
		r.dir, r.mu.Path, err = WorkDir(ctx, gitWorkDirType, r.remote)
		if err != nil {
			return nil, err
		}

		unlock, err := r.mu.Lock()
		if err != nil {
			return nil, err
		}
		defer unlock()

		if _, err := os.Stat(filepath.Join(r.dir, "objects")); err != nil {
			if _, err := Run(ctx, r.dir, "git", "init", "--bare"); err != nil {
				os.RemoveAll(r.dir)

func (w *Work[T]) Add(item T) {
	w.mu.Lock()
	w.init()
	if !w.added[item] {
		w.added[item] = true
		w.todo = append(w.todo, item)
		if w.waiting > 0 {
			w.wait.Signal()
		}
	}
	w.mu.Unlock()
}

// Do runs f in parallel on items from the work set,
// with at most n invocations of f running at a time.
// It returns when everything added to the work set has been processed.