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03-Apr-2015 |
David Brazdil <dbrazdil@google.com> |
ART: Implement HBooleanNot instruction
Optimizations simplifying operations on boolean values (boolean
simplifier, instruction simplifier) can benefit from having a special
HInstruction for negating booleans in order to perform more transforms
and produce faster machine code.
This patch implements HBooleanNot as 'x xor 1', assuming that booleans
are 1-bit integers and allowing for a single-instruction negation on
all supported platforms.
Change-Id: I33a2649c1821255b18a86ca68ed16416063c739f
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