On Fri, 18 Oct 2024 21:56:53 GMT, Shaojin Wen <s...@openjdk.org> wrote:
>> After PR https://github.com/openjdk/jdk/pull/16245, C2 optimizes stores into >> primitive arrays by combining values into larger stores. >> >> This PR rewrites the code of appendNull and append(boolean) methods so that >> these two methods can be optimized by C2. > > Shaojin Wen has updated the pull request with a new target base due to a > merge or a rebase. The incremental webrev excludes the unrelated changes > brought in by the merge/rebase. The pull request contains 26 additional > commits since the last revision: > > - Merge remote-tracking branch 'origin/optim_str_builder_append_202406' into > optim_str_builder_append_202406 > - fix build error > - Merge remote-tracking branch 'upstream/master' into > optim_str_builder_append_202406 > - Merge remote-tracking branch 'upstream/master' into > optim_str_builder_append_202406 > - Merge remote-tracking branch 'origin/optim_str_builder_append_202406' into > optim_str_builder_append_202406 > - Merge remote-tracking branch 'upstream/master' into > optim_str_builder_append_202406 > - Merge remote-tracking branch 'upstream/master' into > optim_str_builder_append_202406 > - revert test > - Merge remote-tracking branch 'upstream/master' into > optim_str_builder_append_202406 > - Merge remote-tracking branch 'upstream/master' into > optim_str_builder_append_202406 > - ... and 16 more: https://git.openjdk.org/jdk/compare/a86af3e4...457735c9 There is no array out-of-bounds check when using Unsafe. In the appendNull method, there is already a call to ensureCapacityInternal. It is also safe to use Unsafe in this scenario. ------------- PR Comment: https://git.openjdk.org/jdk/pull/19626#issuecomment-2425373747
