o1 = OP_IR(c.opir(APCALAU12I), uint32(0), uint32(REGTMP))
		rel := obj.Addrel(c.cursym)
		rel.Off = int32(c.pc)
		rel.Siz = 4
		rel.Sym = p.To.Sym
		rel.Add = p.To.Offset
		rel.Type = objabi.R_LOONG64_ADDR_HI

		o2 = OP_12IRR(c.opirr(p.As), uint32(0), uint32(REGTMP), uint32(p.From.Reg))
		rel2 := obj.Addrel(c.cursym)
		rel2.Off = int32(c.pc + 4)
		rel2.Siz = 4
		rel2.Sym = p.To.Sym
		rel2.Add = p.To.Offset

}

/*
 * look for the next file in an archive.
 * adapted from libmach.
 */
func nextar(bp *bio.Reader, off int64, a *ArHdr) int64 {
	if off&1 != 0 {
		off++
	}
	bp.MustSeek(off, 0)
	var buf [SAR_HDR]byte
	if n, err := io.ReadFull(bp, buf[:]); err != nil {
		if n == 0 && err != io.EOF {
			return -1
		}
		return 0
	}

		o1 = OP_IRR(c.opirr(ALUI), 0, REGZERO, REGTMP)
		rel := obj.Addrel(c.cursym)
		rel.Off = int32(c.pc)
		rel.Siz = 4
		rel.Sym = p.To.Sym
		rel.Add = p.To.Offset
		rel.Type = objabi.R_ADDRMIPSU
		o2 = OP_IRR(c.opirr(p.As), 0, REGTMP, p.From.Reg)
		rel2 := obj.Addrel(c.cursym)
		rel2.Off = int32(c.pc + 4)
		rel2.Siz = 4
		rel2.Sym = p.To.Sym
		rel2.Add = p.To.Offset

			// in decompose.go does the opposite -- it creates a
			// LocalSlot object with "Off" set to zero, but with
			// SplitOf pointing to a parent slot, and SplitOffset
			// holding the offset into the parent object.
			pieceSlot := LocalSlot{N: n, Type: t, Off: offsets[k]}

			// Look up this piece to see if we've seen a reg op
			// for it. If not, create one.

var gcController gcControllerState

type gcControllerState struct {
	// Initialized from GOGC. GOGC=off means no GC.
	gcPercent atomic.Int32

	// memoryLimit is the soft memory limit in bytes.
	//
	// Initialized from GOMEMLIMIT. GOMEMLIMIT=off is equivalent to MaxInt64
	// which means no soft memory limit in practice.
	//

  // such, we respect _XlaScope only when auto_jit is off, while respecting
  // _XlaInternalScope only when auto_jit is on.
  //
  // We may want to restrict the _XlaScope behavior to require all nodes marked
  // with _XlaCompile=true to also have a _XlaScope property set (and raise an
  // error otherwise); but for now we don't do this.

  if (global_jit_level_ != OptimizerOptions::OFF) {

			// structs are in system headers that cannot be corrected.
			continue
		}

		// Round off up to talign, assumed to be a power of 2.
		off = (off + talign - 1) &^ (talign - 1)

		if f.ByteOffset > off {
			fld, sizes = c.pad(fld, sizes, f.ByteOffset-off)
			off = f.ByteOffset
		}
		if f.ByteOffset < off {
			// Drop a packed field that we can't represent.
			continue
		}

		n := len(fld)

	os.Setenv("GOBIN", gorootBin)

	// Make the environment more predictable.
	os.Setenv("LANG", "C")
	os.Setenv("LANGUAGE", "en_US.UTF8")
	os.Unsetenv("GO111MODULE")
	os.Setenv("GOENV", "off")
	os.Unsetenv("GOFLAGS")
	os.Setenv("GOWORK", "off")

	workdir = xworkdir()
	if err := os.WriteFile(pathf("%s/go.mod", workdir), []byte("module bootstrap"), 0666); err != nil {
		fatalf("cannot write stub go.mod: %s", err)
	}

	-short
	    Tell long-running tests to shorten their run time.
	    It is off by default but set during all.bash so that installing
	    the Go tree can run a sanity check but not spend time running
	    exhaustive tests.

	-shuffle off,on,N
	    Randomize the execution order of tests and benchmarks.
	    It is off by default. If -shuffle is set to on, then it will seed

		base.Fatalf("go: unknown environment setting GO111MODULE=%s", env)
	case "auto":
		mustUseModules = ForceUseModules
	case "on", "":
		mustUseModules = true
	case "off":
		if ForceUseModules {
			base.Fatalf("go: modules disabled by GO111MODULE=off; see 'go help modules'")
		}
		mustUseModules = false
		return
	}

	if err := fsys.Init(base.Cwd()); err != nil {
		base.Fatal(err)
	}