84065c5f1e
Reason for revert: Breaks GC stress: http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/1984/steps/Bisect%20c5528ac1.Retry/logs/regress-crbug-450960 Original issue's description: > [turbofan] Add initial support for global specialization. > > Introduce a new JSGlobalSpecialization advanced reducer that runs > during the initial inlining and context specialization, and specializes > the graph to the globals of the native context. Currently we assume > that we do not inline cross native context, but long-term we will grab > the global object from the JSLoadGlobal/JSStoreGlobal feedback (with the > new global load/store ICs that are currently in the workings), and then > this whole specialization will be fully compositional even across > cross-context inlining. > > Note that we cannot really handle most of the stores to global object > property cells because TurboFan doesn't have a mechanism to enforce > certain representations. Also note that we cannot yet fully benefit > from the type feedback collected on the global object property cells, > because the type system cannot deal with maps in a reasonable way. > > CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel > R=jarin@chromium.org > BUG=v8:4470 > LOG=n > > Committed: https://crrev.com/6fbf7903f94924ea066af481719898bd9667b6eb > Cr-Commit-Position: refs/heads/master@{#31139} TBR=jarin@chromium.org NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=v8:4470 Review URL: https://codereview.chromium.org/1390073004 Cr-Commit-Position: refs/heads/master@{#31144} |
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