2 Commits

Author	SHA1	Message	Date
bmeurer	551e0aa11b	[es6] Reintroduce the instanceof operator in the backends. ... This adds back the instanceof operator support in the backends and introduces a @@hasInstance protector cell on the isolate that guards the fast path for the InstanceOfStub. This way we recover the ~10% regression on Octane EarleyBoyer in Crankshaft and greatly improve TurboFan and Ignition performance of instanceof. R=ishell@chromium.org TBR=hpayer@chromium.org,rossberg@chromium.org BUG=chromium:597249, v8:4447 LOG=n Review-Url: https://codereview.chromium.org/1980483003 Cr-Commit-Position: refs/heads/master@{#36275}	2016-05-17 11:25:59 +00:00
mvstanton	deb7d5b090	ES6: Desugaring of instanceof to support @@hasInstance ... This is a rework of the instanceof operator to support ES6 semantics (as per section 12.10.4 of the spec: https://tc39.github.io/ecma262/#sec-instanceofoperator). It's behind flag --harmony-instanceof for now, which is turned on for staging. BUG=v8:4447 LOG=N Review URL: https://codereview.chromium.org/1692713005 Cr-Commit-Position: refs/heads/master@{#34170}	2016-02-19 19:20:38 +00:00