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mvstanton authored
Revert of Type Feedback Vector lives in the closure (patchset #2 id:40001 of https://codereview.chromium.org/1668103002/ ) Reason for revert: Must revert for now due to chromium api natives issues. Original issue's description: > Type Feedback Vector lives in the closure > > (RELAND: the problem before was a missing write barrier for adding the code > entry to the new closure. It's been addressed with a new macro instruction > and test. The only change to this CL is the addition of two calls to > __ RecordWriteCodeEntryField() in the platform CompileLazy builtin.) > > We get less "pollution" of type feedback if we have one vector per native > context, rather than one for the whole system. This CL moves the vector > appropriately. > > We rely more heavily on the Optimized Code Map in the SharedFunctionInfo. The > vector actually lives in the first slot of the literals array (indeed there is > great commonality between those arrays, they can be thought of as the same > thing). So we make greater effort to ensure there is a valid literals array > after compilation. > > This meant, for performance reasons, that we needed to extend > FastNewClosureStub to support creating closures with literals. And ultimately, > it drove us to move the optimized code map lookup out of FastNewClosureStub > and into the compile lazy builtin. > > The heap change is trivial so I TBR Hannes for it... > Also, Yang has had a look at the debugger changes already and approved 'em. So he is TBR style too. > And Benedikt reviewed it as well. > > TBR=hpayer@chromium.org, yangguo@chromium.org, bmeurer@chromium.org > > BUG= > > Committed: https://crrev.com/bb31db3ad6de16f86a61f6c7bbfd3274e3d957b5 > Cr-Commit-Position: refs/heads/master@{#33741} TBR=bmeurer@chromium.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG= Review URL: https://codereview.chromium.org/1670813005 Cr-Commit-Position: refs/heads/master@{#33766}
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