• Leszek Swirski's avatar
    Revert "[compiler] Drive optimizations with feedback vector" · 58978da6
    Leszek Swirski authored
    This reverts commit e39c9e02.
    
    Reason for revert: Breaks https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/15561
    
    Original change's description:
    > [compiler] Drive optimizations with feedback vector
    > 
    > For interpreted functions, use the optimized code slot in the feedback vector
    > to store an optimization marker (optimize/in optimization queue) rather than
    > changing the JSFunction's code object. Then, adapt the self-healing mechanism
    > to also dispatch based on this optimization marker. Similarly, replace SFI
    > marking with optimization marker checks in CompileLazy.
    > 
    > This allows JSFunctions to share optimization information (replacing shared
    > function marking) without leaking this information across native contexts. Non
    > I+TF functions (asm.js or --no-turbo) use a CheckOptimizationMarker shim which
    > generalises the old CompileOptimized/InOptimizationQueue builtins and also
    > checks the same optimization marker as CompileLazy and
    > InterpreterEntryTrampoline.
    > 
    > Change-Id: I6826bdde7ab9a919cdb6b69bc0ebc6174bcb91ae
    > Reviewed-on: https://chromium-review.googlesource.com/509716
    > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
    > Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
    > Cr-Commit-Position: refs/heads/master@{#45901}
    
    TBR=rmcilroy@chromium.org,mstarzinger@chromium.org,leszeks@chromium.org
    No-Presubmit: true
    No-Tree-Checks: true
    No-Try: true
    
    Change-Id: Ib6c2b4d90fc5f659a6dcaf3fd30321507ca9cb94
    Reviewed-on: https://chromium-review.googlesource.com/532916Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
    Commit-Queue: Leszek Swirski <leszeks@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#45903}
    58978da6
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