[aarch64-port-dev ] RFR: aarch64: elide DecodeN when followed by CmpP 0

[Andrew Haley]

On 09/21/2015 12:39 PM, Hui Shi wrote:
> A newbie question, how to determine "DecodeN" result is not used later, is
> there some use count here?

It wouldn't appear in that form if it was used later.  There would be
a mov into a temporary register, and that register would be used as the
source for both operations.

Andrew.