Commit c763e350 authored by Matteo Franchin's avatar Matteo Franchin Committed by Andreas Gampe
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AArch64: Implement InexpensiveConstant methods. 

Implement IsInexpensiveConstant and friends for A64.
Also extending the methods to take the opcode with respect to which
the constant is inexpensive. Additionally, logical operations (i.e.
and, or, xor) can now handle the immediates 0 and ~0 (which are not
logical immediates).

Change-Id: I46ce1287703765c5ab54983d13c1b3a1f5838622
parent c7975a33
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