// lookup per module, and we don't want to load information that's neither
	// relevant nor actionable.
	type modFlags int
	const (
		resolved modFlags = 1 << iota // version resolved by 'go get'
		named                         // explicitly named on command line or provides a named package
		hasPkg                        // needed to build named packages

// to safely deal with potentially invalid pointers, since resolving
// such pointers may race with a span being allocated.
type mSpanState uint8

const (
	mSpanDead   mSpanState = iota
	mSpanInUse             // allocated for garbage collected heap
	mSpanManual            // allocated for manual management (e.g., stack allocator)
)

// mSpanStateNames are the names of the span states, indexed by

		c.Cleanup(func() {
			os.Unsetenv(key)
		})
	}
}

// panicHandling controls the panic handling used by runCleanup.
type panicHandling int

const (
	normalPanic panicHandling = iota
	recoverAndReturnPanic
)

// runCleanup is called at the end of the test.
// If ph is recoverAndReturnPanic, it will catch panics, and return the
// recovered value if any.

	// imports to be in "all" (such as when the test is itself within the main
	// module, or when ld.allClosesOverTests is true).
	pkgInAll loadPkgFlags = 1 << iota

	// pkgIsRoot indicates that the package matches one of the root package
	// patterns requested by the caller.
	//
	// If LoadTests is set, then when pkgIsRoot and pkgImportsLoaded are both set,

	}
	if stderr == "" {
		fatalf("%s produced no output\non input:\n%s", gccBaseCmd[0], b.Bytes())
	}

	completed := false
	sniff := make([]int, len(names))
	const (
		notType = 1 << iota
		notIntConst
		notNumConst
		notStrLiteral
		notDeclared
	)
	sawUnmatchedErrors := false
	for _, line := range strings.Split(stderr, "\n") {
		// Ignore warnings and random comments, with one

		if err != io.EOF {
			log.Fatalf("reading input: %v", err)
		}
		return -1
	}
	return int(c)
}

type markKind uint8 // for postorder traversal
const (
	_ markKind = iota
	visiting
	visited
)

func postorder(libs []*sym.Library) []*sym.Library {
	order := make([]*sym.Library, 0, len(libs)) // hold the result
	mark := make(map[*sym.Library]markKind, len(libs))

		{`package f6b; var _            =  1e-2000i`, `1e-2000i`, `complex128`, `(0 + 0i)`},
		{`package f7b; var _            = -1e-2000i`, `-1e-2000i`, `complex128`, `(0 + 0i)`},

		{`package g0; const (a = len([iota]int{}); b; c); const _ = c`, `c`, `int`, `2`}, // go.dev/issue/22341
		{`package g1; var(j int32; s int; n = 1.0<<s == j)`, `1.0`, `int32`, `1`},        // go.dev/issue/48422
	}

	for _, test := range tests {

	"cmd/compile/internal/ir"
	"cmd/compile/internal/types"
	"cmd/internal/src"
	"cmd/internal/sys"
	"fmt"
	"internal/buildcfg"
	"math/bits"
	"unsafe"
)

const (
	moveSpills = iota
	logSpills
	regDebug
	stackDebug
)

// distance is a measure of how far into the future values are used.
// distance is measured in units of instructions.
const (
	likelyDistance   = 1

var hasPCrel = buildcfg.GOPPC64 >= 10 && buildcfg.GOOS == "linux"

const (
	// For genstub, the type of stub required by the caller.
	STUB_TOC = iota
	STUB_PCREL
)

var stubStrs = []string{
	STUB_TOC:   "_callstub_toc",
	STUB_PCREL: "_callstub_pcrel",
}

const (
	OP_TOCRESTORE    = 0xe8410018 // ld r2,24(r1)

	//
	// Note that there are a small number of fatal situations that will throw
	// regardless of unwindPrintErrors or unwindSilentErrors.
	unwindPrintErrors unwindFlags = 1 << iota

	// unwindSilentErrors silently ignores errors during unwinding.
	unwindSilentErrors

	// unwindTrap indicates that the initial PC and SP are from a trap, not a
	// return PC from a call.
	//