Revert of [turbofan] Speculatively optimize string character access. (patchset...
Revert of [turbofan] Speculatively optimize string character access. (patchset #1 id:1 of https://codereview.chromium.org/2905623003/ ) Reason for revert: Changes layout tests: https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/15867 See: https://github.com/v8/v8/wiki/Blink-layout-tests Original issue's description: > [turbofan] Speculatively optimize string character access. > > Add a protector cell for string bounds checks that is being used to > protect speculative bounds for String.prototype.charCodeAt and > String.prototype.charAt in TurboFan (and Crankshaft). This way we don't > have the diamond in optimized code, which stands in the way of other > optimizations for charCodeAt that are currently being worked on by > petermarshall@. > > BUG=v8:6391 > TBR=mlippautz@chromium.org > R=petermarshall@chromium.org > > Review-Url: https://codereview.chromium.org/2905623003 > Cr-Commit-Position: refs/heads/master@{#45514} > Committed: https://chromium.googlesource.com/v8/v8/+/9d8bd0551657d60c66b2f96544eecedfba1cba8a TBR=petermarshall@chromium.org,mlippautz@chromium.org,bmeurer@chromium.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=v8:6391 Review-Url: https://codereview.chromium.org/2900333002 Cr-Commit-Position: refs/heads/master@{#45521}
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