| commit | 85e5567dae66a918500ae94c5568221137a0f5d4 | [log] [tgz] |
|---|---|---|
| author | bmeurer <bmeurer@chromium.org> | Tue Jun 14 05:37:27 2016 |
| committer | Commit bot <commit-bot@chromium.org> | Tue Jun 14 06:12:06 2016 |
| tree | 2ece4884be26dea9da1d2760b08ca5465b614cd7 | |
| parent | b78b0bf90c1e58414ad94c997287cf5564d330f0 [diff] |
[turbofan] Introduce a dedicated CheckBounds operator. This CheckBounds simplified operator is similar to the HBoundsCheck in Crankshaft, and is hooked up to the new type feedback support in the SimplifiedLowering. We use it to check the index bounds for keyed property accesses. Note to perf sheriffs: This will tank quite a few benchmarks, as the operator makes some redundant branch elimination ineffective for certain patterns of keyed accesses. This does require more serious redundancy elimination, which we will do in a separate CL. So ignore any regressions from this CL, we know there will be a few. R=jarin@chromium.org BUG=v8:4470,v8:5100 Review-Url: https://codereview.chromium.org/2035893004 Cr-Commit-Position: refs/heads/master@{#36947}
V8 is Google's open source JavaScript engine.
V8 implements ECMAScript as specified in ECMA-262.
V8 is written in C++ and is used in Google Chrome, the open source browser from Google.
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