(MOVHBRstore ptr (MOV(H|HZ|W|WZ)reg x) mem) => (MOVHBRstore ptr x mem)
(MOVWBRstore ptr (MOV(W|WZ)reg x) mem) => (MOVWBRstore ptr x mem)

// Lose W-widening ops fed to compare-W
(CMP(W|WU) x (MOV(W|WZ)reg y)) => (CMP(W|WU) x y)
(CMP(W|WU) (MOV(W|WZ)reg x) y) => (CMP(W|WU) x y)

(CMP x (MOVDconst [c])) && is16Bit(c) => (CMPconst x [c])
(CMP (MOVDconst [c]) y) && is16Bit(c) => (InvertFlags (CMPconst y [c]))

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  url: https://github.com/shashstormer
- login: wu-clan
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superryanguo, Sven Mayer, Tapan Prakash, Tiago Morais Morgado, Till Hoffmann, Tj
Rana, Vadim Markovtsev, vhasanov, Wei Wu, windead, Yan (Asta) Li, Yan Chen, Yann
Henon, Yi Wang, Yong Tang, yorkie, Yuan (Terry) Tang, Yuxin Wu, zhengjiajin,
zhongzyd, 黄璞

We are also grateful to all who filed issues or helped resolve them, asked and

	streamID uint32 // or 0 for conn-level
	n        uint32
}

func (wu http2writeWindowUpdate) staysWithinBuffer(max int) bool { return http2frameHeaderLen+4 <= max }

func (wu http2writeWindowUpdate) writeFrame(ctx http2writeContext) error {
	return ctx.Framer().WriteWindowUpdate(wu.streamID, wu.n)
}

// encodeHeaders encodes an http.Header. If keys is not nil, then (k, h[k])