for {
		progress := false
		for c, used := range s.copies {
			if !used && c.Uses == 0 {
				if s.f.pass.debug > regDebug {
					fmt.Printf("delete copied value %s\n", c.LongString())
				}
				c.resetArgs()
				f.freeValue(c)
				delete(s.copies, c)
				progress = true
			}
		}
		if !progress {
			break
		}
	}

	for _, b := range s.visitOrder {
		i := 0

		if b != "" {
			return b
		}
	}

	// The $GOROOT/VERSION.cache file is a cache to avoid invoking
	// git every time we run this command. Unlike VERSION, it gets
	// deleted by the clean command.
	path = pathf("%s/VERSION.cache", goroot)
	if isfile(path) {
		return chomp(readfile(path))
	}

	// Show a nicer error message if this isn't a Git repo.
	if !isGitRepo() {

(CMP(W|WU) (MOVDconst [c]) x) => (InvertFlags (CMP(W|WU)const x [int32(c)]))

// Match (x >> c) << d to 'rotate then insert selected bits [into zero]'.
(SLDconst (SRDconst x [c]) [d]) => (RISBGZ x {s390x.NewRotateParams(uint8(max8(0, int8(c-d))), 63-d, uint8(int8(d-c)&63))})

// Match (x << c) >> d to 'rotate then insert selected bits [into zero]'.

	tg.grepStdout("coverage: 100", "no coverage")
}

// Regression test for golang.org/issue/34499: version command should not crash
// when executed in a deleted directory on Linux.
func TestExecInDeletedDir(t *testing.T) {
	switch runtime.GOOS {
	case "windows", "plan9",
		"aix",                // Fails with "device busy".

		got := [2]string{
			sel.String(),
			fmt.Sprintf("%s%v", direct, sel.Index()),
		}
		want := wantOut[segment]
		if want != got {
			t.Errorf("%s: got %q; want %q", segment, got, want)
		}
		delete(wantOut, segment)

		// We must explicitly assert properties of the
		// Signature's receiver since it doesn't participate
		// in Identical() or String().
		sig, _ := sel.Type().(*Signature)

	return mg.g.RequiredBy(m)
}

// Selected returns the selected version of the module with the given path.
//
// If no version is selected, Selected returns version "none".
func (mg *ModuleGraph) Selected(path string) (version string) {
	return mg.g.Selected(path)
}

// WalkBreadthFirst invokes f once, in breadth-first order, for each module

			if missing := (*ImportMissingError)(nil); errors.As(mismatch.err, &missing) {
				selected := module.Version{
					Path:    pkg.mod.Path,
					Version: mg.Selected(pkg.mod.Path),
				}
				ld.error(fmt.Errorf("%s loaded from %v,\n\tbut go %s would fail to locate it in %s", pkg.stackText(), pkg.mod, compatVersion, selected))
			} else {
				if ambiguous := (*AmbiguousImportError)(nil); errors.As(mismatch.err, &ambiguous) {

// was selected at the start of this 'go get' invocation.
func (r *resolver) initialSelected(mPath string) (version string) {
	v, ok := r.initialVersion[mPath]
	if !ok {
		return "none"
	}
	return v
}

// selected returns the version of the module with the given path that is
// selected in the resolver's current build list.

	// so in order to ensure that the build list itself is reproducible,
	// we need sums for every go.mod in the graph (regardless of whether
	// that version is selected).
	keep := make(map[module.Version]bool)

	// Add entries for modules in the build list with paths that are prefixes of
	// paths of loaded packages. We need to retain sums for all of these modules —

		}
	}

	// Remove functions only used as expressions, so their respective
	// bridge functions are not generated.
	for name, used := range functions {
		if !used {
			delete(f.Name, name)
		}
	}
}

// rewriteName returns the expression used to rewrite a reference.
// If addPosition is true, add position info in the ident name.