• mlippautz's avatar
    Reland of [turbofan] Restore basic write barrier elimination. (patchset #1... · 95b8f3b0
    mlippautz authored
    Reland of [turbofan] Restore basic write barrier elimination. (patchset #1 id:1 of https://codereview.chromium.org/1943743003/ )
    
    Reason for revert:
    Jakob found the actual issue with the CL and is going to land the fix after relanding the WB elimination.
    
    Original issue's description:
    > Revert of [turbofan] Restore basic write barrier elimination. (patchset #2 id:20001 of https://codereview.chromium.org/1938993002/ )
    >
    > Reason for revert:
    > Breaks WBs that should be there ;)
    >
    > https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/3305
    >
    > Will open repro bug asap.
    >
    > Original issue's description:
    > > [turbofan] Restore basic write barrier elimination.
    > >
    > > Restore the basic write barrier elimination that we used to run as part
    > > of the simplified lowering phase (in ChangeLowering actually) before, by
    > > moving the write barrier computation to SimplifiedLowering where we can
    > > still look at types and consider the heap/isolate, and just update the
    > > WriteBarrierKind in the FieldAccess/ElementAccess that we later use when
    > > lowering to a machine Load/Store.
    > >
    > > CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
    > > R=mstarzinger@chromium.org
    > > BUG=v8:4969,chromium:608636
    > > LOG=n
    > >
    > > Committed: https://crrev.com/7dcb6ad379fbacbc8bdc8e11a6e50d680ffa3f62
    > > Cr-Commit-Position: refs/heads/master@{#35969}
    >
    > TBR=mstarzinger@chromium.org,bmeurer@chromium.org
    > # Skipping CQ checks because original CL landed less than 1 days ago.
    > NOPRESUBMIT=true
    > NOTREECHECKS=true
    > NOTRY=true
    > BUG=v8:4969,chromium:608636
    >
    > Committed: https://crrev.com/a782e93c617e728cded5ad878de11137a67891b7
    > Cr-Commit-Position: refs/heads/master@{#35983}
    
    TBR=mstarzinger@chromium.org,bmeurer@chromium.org
    # Skipping CQ checks because original CL landed less than 1 days ago.
    NOPRESUBMIT=true
    NOTREECHECKS=true
    NOTRY=true
    BUG=v8:4969,chromium:608636
    
    Review-Url: https://codereview.chromium.org/1943323002
    Cr-Commit-Position: refs/heads/master@{#35984}
    95b8f3b0
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