pp := mp.p.ptr()
	newg := gfget(pp)
	if newg == nil {
		newg = malg(stackMin)
		casgstatus(newg, _Gidle, _Gdead)
		allgadd(newg) // publishes with a g->status of Gdead so GC scanner doesn't look at uninitialized stack.
	}
	if newg.stack.hi == 0 {
		throw("newproc1: newg missing stack")
	}

	if readgstatus(newg) != _Gdead {
		throw("newproc1: new g is not Gdead")
	}

}

// GoCreate emits a GoCreate event.
func (tl traceLocker) GoCreate(newg *g, pc uintptr, blocked bool) {
	newg.trace.setStatusTraced(tl.gen)
	ev := traceEvGoCreate
	if blocked {
		ev = traceEvGoCreateBlocked
	}
	tl.eventWriter(traceGoRunning, traceProcRunning).commit(ev, traceArg(newg.goid), tl.startPC(pc), tl.stack(2))
}

// GoStart emits a GoStart event.
//

(AtomicExchange(32|64) ...) => (LoweredAtomicExchange(32|64) ...)

(AtomicAdd(32|64) ...) => (LoweredAtomicAdd(32|64) ...)

(AtomicCompareAndSwap(32|64) ptr old new_ mem) => (LoweredAtomicCas(32|64) [1] ptr old new_ mem)
(AtomicCompareAndSwapRel32   ptr old new_ mem) => (LoweredAtomicCas32 [0] ptr old new_ mem)

(AtomicAnd(8|32)  ...) => (LoweredAtomicAnd(8|32)  ...)
(AtomicOr(8|32)   ...) => (LoweredAtomicOr(8|32)   ...)

	v_2 := v.Args[2]
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	// match: (AtomicCompareAndSwap32 ptr old new_ mem)
	// result: (LoweredAtomicCas32 [1] ptr old new_ mem)
	for {
		ptr := v_0
		old := v_1
		new_ := v_2
		mem := v_3
		v.reset(OpPPC64LoweredAtomicCas32)
		v.AuxInt = int64ToAuxInt(1)
		v.AddArg4(ptr, old, new_, mem)
		return true
	}
}
func rewriteValuePPC64_OpAtomicCompareAndSwap64(v *Value) bool {