diff options
| author | Mathieu Chartier <mathieuc@google.com> | 2019-08-26 12:33:46 -0700 |
|---|---|---|
| committer | Mathieu Chartier <mathieuc@google.com> | 2019-08-29 16:05:52 +0000 |
| commit | 79e6eb8b79be6249358b7801bc511290dacf10d0 (patch) | |
| tree | 1a04d214dd6223423abd442d8d9b0b61a3db2336 /test/ProfileTestMultiDex/Second.java | |
| parent | bae88c0759d48acf29b58d960ad2665e3462dfda (diff) | |
Prevent overflow for AOT hotness counters
Previous, the addition did not have a check for overflow and might wrap
around since the counter is only 16 bits.
Modified the test to exercise this.
The slowdown from fixing the overflow is 2% average on golem arm32/64.
Overall this brings the slowdown from the counter to ~15% from ~13%.
The benchmarks that regress the most are loopy ones that I would
consider non-representative. Code size increases by 0.6%.
Bug: 139883463
Test: test/run-test --host --64 --prebuild 674-hotness-compiled
Test: test/run-test --host --prebuild 674-hotness-compiled
Test: test/run-test --64 --prebuild 674-hotness-compiled
Test: test/run-test ---prebuild 674-hotness-compiled
Change-Id: Icf0ab2aedbc40ab10c9d952ce0f9c7b5e5feaf15
Diffstat (limited to 'test/ProfileTestMultiDex/Second.java')
0 files changed, 0 insertions, 0 deletions