commit 06a2b0157ac0d57636ace812c0f8bfee404a3316
author David Brazdil <dbrazdil@google.com> Fri Apr 22 16:57:00 2016 +0100
committer David Brazdil <dbrazdil@google.com> Fri Apr 22 17:57:28 2016 +0100
tree 409af53a8a4a2cc2c464be7981e71fa2bbe52407
parent 8da7f84709f7640205ac084b402f7424857ef729

ART: Naive NullCheck elimination in InstructionBuilder

Save a little bit of memory by not generating trivially redundant
HNullCheck instructions. This patch builds on the fact that the
InstructionBuilder now directly generates SSA form and looks at the
input of the NullCheck. For obvious cases, such as NewInstance/Array
or `this`, the NullCheck generation is completely avoided.

Bug: 28173563
Change-Id: I1fdf3b096c7a939f7b8586c02a2a6b44dfa43443
(cherry picked from commit c120bbe26fe116d3c9d8322f44bb9e330e07f745)