(ORconst [0] x) => x

// zero-extend of small and => small and
(MOVBZreg y:(ANDconst [c] _)) && uint64(c) <= 0xFF => y
(MOVHZreg y:(ANDconst [c] _)) && uint64(c) <= 0xFFFF => y
(MOVWZreg y:(ANDconst [c] _)) && uint64(c) <= 0xFFFFFFFF => y
(MOVWZreg y:(AND (MOVDconst [c]) _)) && uint64(c) <= 0xFFFFFFFF => y

// sign extend of small-positive and => small-positive-and
(MOVBreg y:(ANDconst [c] _)) && uint64(c) <= 0x7F => y

._config.icon))\n      }\n\n      if (this._config.title != null) {\n        toast_header.append($('<strong />').addClass('mr-auto').html(this._config.title))\n      }\n\n      if (this._config.subtitle != null) {\n        toast_header.append($('<small />').html(this._config.subtitle))\n      }\n\n      if (this._config.close == true) {\n        var toast_close = $('<button data-dismiss=\"toast\" />').attr('type', 'button').addClass('ml-2 mb-1 close').attr('aria-label', 'Close').append('<span ar...

// Strip off any fractional word zeroing.
(Zero [s] destptr mem) && s%8 != 0 && s > 8 && !config.useSSE =>
	(Zero [s-s%8] (OffPtr <destptr.Type> destptr [s%8])
		(MOVQstoreconst [makeValAndOff(0,0)] destptr mem))

// Zero small numbers of words directly.
(Zero [16] destptr mem) && !config.useSSE =>
	(MOVQstoreconst [makeValAndOff(0,8)] destptr
		(MOVQstoreconst [makeValAndOff(0,0)] destptr mem))
(Zero [24] destptr mem) && !config.useSSE =>

(Store {t} ptr val mem) && t.Size() == 2 => (MOVHstore ptr val mem)
(Store {t} ptr val mem) && t.Size() == 1 => (MOVBstore ptr val mem)

// Lowering moves

// Load and store for small copies.
(Move [0] _ _ mem) => mem
(Move [1] dst src mem) => (MOVBstore dst (MOVBZload src mem) mem)
(Move [2] dst src mem) => (MOVHstore dst (MOVHZload src mem) mem)