aa474eb597056d21c0b21d353b9b6aa460351d0f - platform/art

commit	aa474eb597056d21c0b21d353b9b6aa460351d0f	[log] [tgz]
author	Mathieu Chartier <mathieuc@google.com>	Wed Nov 09 15:18:27 2016 -0800
committer	Mathieu Chartier <mathieuc@google.com>	Wed Nov 09 15:59:33 2016 -0800
tree	738ba965a552ac0e4814cb1131ef0dd96ae14142
parent	334b5c3d0d5d84242b4528241c759789e532ce08 [diff]

Avoid read barriers for inlined check cast

Avoiding read barriers improves speed and reduces code size.

Doing this can never result in false positives, only false negatives.
These false negatives are handled correcly by rechecking in the
entrypoint.

Ritzperf code size for CC:
arm32: 13439400->13300136 (-1.04%)
arm64: 16405120->16253568 (-0.92%)

Perf: TODO

Bug: 29516974
Bug: 12687968

Test: test-art-host, run ritzperf both with CC

Change-Id: Ie024e0b1e8ee415781fb73e8029e87e8a5318f86

compiler/optimizing/code_generator_arm.cc[diff]
compiler/optimizing/code_generator_arm.h[diff]
compiler/optimizing/code_generator_arm64.cc[diff]
compiler/optimizing/code_generator_arm64.h[diff]
compiler/optimizing/code_generator_x86.cc[diff]
compiler/optimizing/code_generator_x86.h[diff]
compiler/optimizing/code_generator_x86_64.cc[diff]
compiler/optimizing/code_generator_x86_64.h[diff]

8 files changed

tree: 738ba965a552ac0e4814cb1131ef0dd96ae14142