• machenbach's avatar
    Revert of [turbofan] Remove left-over change bits from ChangeLowering.... · b4c3864b
    machenbach authored
    Revert of [turbofan] Remove left-over change bits from ChangeLowering. (patchset #2 id:20001 of https://codereview.chromium.org/1941673002/ )
    
    Reason for revert:
    [Sheriff] Breaks mac gc stress:
    https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/5821
    
    Original issue's description:
    > [turbofan] Remove left-over change bits from ChangeLowering.
    >
    > Now ChangeLowering is only concerned with lowering memory access and
    > allocation operations, and all changes are consistently lowered during
    > the effect/control linearization pass. The next step is to move the
    > left over lowerings to a pass dedicated to eliminate redundant loads and
    > stores, eliminate write barriers, fold and inline allocations.
    >
    > Also remove the atomic regions now that we wire everything into the
    > effect chain properly. This is an important step towards allocation
    > inlining.
    >
    > Drive-by-fix: Rename ChangeBitToBool to ChangeBitToTagged,
    > ChangeBoolToBit to ChangeTaggedToBit, and ChangeInt31ToTagged to
    > ChangeInt31ToTaggedSigned for consistency.
    >
    > CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux64_tsan_rel
    >
    > Committed: https://crrev.com/ceca5ae308bddda166651c654f96d71d74f617d0
    > Cr-Commit-Position: refs/heads/master@{#35924}
    
    TBR=ishell@chromium.org,bmeurer@chromium.org
    # Skipping CQ checks because original CL landed less than 1 days ago.
    NOPRESUBMIT=true
    NOTREECHECKS=true
    NOTRY=true
    
    Review-Url: https://codereview.chromium.org/1942733002
    Cr-Commit-Position: refs/heads/master@{#35927}
    b4c3864b
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