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aarch64: Use the xzr register whenever possible #482

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siddhesh commented Mar 1, 2019

Using the xzr register for store inputs and the second operand of
arithmetic operations frees up a register for use elsewhere.

aarch64: Use the xzr register whenever possible
Using the xzr register for store inputs and the second operand of
arithmetic operations frees up a register for use elsewhere.
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