{name: "generic deadcode", fn: deadcode, required: true}, // remove dead stores, which otherwise mess up store chain
	{name: "check bce", fn: checkbce},
	{name: "branchelim", fn: branchelim},
	{name: "late fuse", fn: fuseLate},
	{name: "dse", fn: dse},
	{name: "memcombine", fn: memcombine},
	{name: "writebarrier", fn: writebarrier, required: true}, // expand write barrier ops
	{name: "insert resched checks", fn: insertLoopReschedChecks,