// HMULx[U] are intentionally not marked as commutative, even though they are.
		// This is because they have asymmetric register requirements.
		// There are rewrite rules to try to place arguments in preferable slots.
		{name: "HMULQ", argLength: 2, reg: gp21hmul, asm: "IMULQ", clobberFlags: true},
		{name: "HMULL", argLength: 2, reg: gp21hmul, asm: "IMULL", clobberFlags: true},

		return nil, nil, err
	}
	outGo = append(outGo, gofiles...)

	// Use sequential object file names to keep them distinct
	// and short enough to fit in the .a header file name slots.
	// We no longer collect them all into _all.o, and we'd like
	// tools to see both the .o suffix and unique names, so
	// we need to make them short enough not to be truncated
	// in the final archive.
	oseq := 0

	// We have to make sure that the out slice lives at least until
	// the runtime knows the return values are valid. Otherwise, the
	// return values might not be scanned by anyone during a GC.
	// (out would be dead, and the return slots not yet alive.)
	runtime.KeepAlive(out)

	// runtime.getArgInfo expects to be able to find ctxt on the
	// stack when it finds our caller, makeFuncStub. Make sure it
	// doesn't get garbage collected.

 *
 * @author Charles Fry
 * @author Bob Lee ({@code com.google.common.collect.MapMaker})
 * @author Doug Lea ({@code ConcurrentHashMap})
 */
@SuppressWarnings({
  "GoodTime", // lots of violations (nanosecond math)
  "nullness", // too much trouble for the payoff
})
@GwtCompatible(emulated = true)
// TODO(cpovirk): Annotate for nullness.

 *
 * @author Charles Fry
 * @author Bob Lee ({@code com.google.common.collect.MapMaker})
 * @author Doug Lea ({@code ConcurrentHashMap})
 */
@SuppressWarnings({
  "GoodTime", // lots of violations (nanosecond math)
  "nullness", // too much trouble for the payoff
})
@GwtCompatible(emulated = true)
// TODO(cpovirk): Annotate for nullness.

// MOVDnop doesn't emit instruction, only for ensuring the type.
(MOVDreg x) && x.Uses == 1 => (MOVDnop x)

// TODO: we should be able to get rid of MOVDnop all together.
// But for now, this is enough to get rid of lots of them.
(MOVDnop (MOVDconst [c])) => (MOVDconst [c])

// fold constant into arithmetic ops
(ADD  x (MOVDconst <t> [c])) && !t.IsPtr() => (ADDconst [c] x)
(SUB  x (MOVDconst [c])) => (SUBconst [c] x)

		traceRelease(trace)
	}

	// Wakeup an additional proc in case we have excessive runnable goroutines
	// in local queues or in the global queue. If we don't, the proc will park itself.
	// If we have lots of excessive work, resetspinning will unpark additional procs as necessary.
	wakep()

	releasem(mp)

	return now
}

// usesLibcall indicates whether this runtime performs system calls