- 08 May, 2019 1 commit
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Mythri A authored
This is a reland of 289b2576. The fix for failures landed here: https://chromium-review.googlesource.com/c/v8/v8/+/1599388 Original change's description: > [Test] Update tests to work with lazy feedback allocation. > > This adds either %EnsureFeedbackVectorForFunction or > %PrepareFunctionForOptimization to allocate feedback vectors when testing > optimization, allocation sites, IC transitions etc., > > Bug: v8:8394 > Change-Id: I6ad1b6d460e4abda693b326cddb87754e080a0a1 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1593303 > Commit-Queue: Mythri Alle <mythria@chromium.org> > Auto-Submit: Mythri Alle <mythria@chromium.org> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> > Cr-Commit-Position: refs/heads/master@{#61212} Bug: v8:8394 Change-Id: Idb5bba221d138e6fd73155f959b9e16fc948c709 TBR: rmcilroy@chromium.org Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1599607Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Mythri Alle <mythria@chromium.org> Auto-Submit: Mythri Alle <mythria@chromium.org> Cr-Commit-Position: refs/heads/master@{#61332}
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- 03 May, 2019 2 commits
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Clemens Hammacher authored
This reverts commit 289b2576. Reason for revert: Fails gc-stress: https://ci.chromium.org/p/v8/builders/ci/V8%20Mac64%20GC%20Stress/7143 Original change's description: > [Test] Update tests to work with lazy feedback allocation. > > This adds either %EnsureFeedbackVectorForFunction or > %PrepareFunctionForOptimization to allocate feedback vectors when testing > optimization, allocation sites, IC transitions etc., > > Bug: v8:8394 > Change-Id: I6ad1b6d460e4abda693b326cddb87754e080a0a1 > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1593303 > Commit-Queue: Mythri Alle <mythria@chromium.org> > Auto-Submit: Mythri Alle <mythria@chromium.org> > Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> > Cr-Commit-Position: refs/heads/master@{#61212} TBR=rmcilroy@chromium.org,mythria@chromium.org Change-Id: I2a78bfd3ee6102c1d2062957970f425308050d3d No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: v8:8394 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1594565Reviewed-by: Clemens Hammacher <clemensh@chromium.org> Commit-Queue: Clemens Hammacher <clemensh@chromium.org> Cr-Commit-Position: refs/heads/master@{#61213}
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Mythri A authored
This adds either %EnsureFeedbackVectorForFunction or %PrepareFunctionForOptimization to allocate feedback vectors when testing optimization, allocation sites, IC transitions etc., Bug: v8:8394 Change-Id: I6ad1b6d460e4abda693b326cddb87754e080a0a1 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1593303 Commit-Queue: Mythri Alle <mythria@chromium.org> Auto-Submit: Mythri Alle <mythria@chromium.org> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#61212}
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- 31 Oct, 2017 1 commit
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Benedikt Meurer authored
This adds support to the KeyedLoadIC to ignore out of bounds accesses for Strings and return undefined instead. We add a dedicated bit to the Smi handler to encode the OOB state and have TurboFan generate appropriate code for that case as well. This is mostly useful when programs accidentially access past the length of a string, which was observed and fixed for example in Babel recently, see https://github.com/babel/babel/pull/6589 for details. The idea is to also extend this mechanism to Arrays and maybe other receivers, as reading beyond the length is also often used in jQuery and other popular libraries. Note that this is considered a mitigation for a performance cliff and not a general optimization of OOB accesses. These should still be avoided and handled properly instead. This seems to further improve the babel test on the web-tooling-benchmark by around 1%, because the OOB access no longer turns the otherwise MONOMORPHIC access into MEGAMORPHIC state. Bug: v8:6936, v8:7014 Change-Id: I9df03304e056d7001a65da8e9621119f8e9bb55b Reviewed-on: https://chromium-review.googlesource.com/744022 Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Camillo Bruni <cbruni@chromium.org> Reviewed-by: Leszek Swirski <leszeks@chromium.org> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#49049}
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