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    • Juliana Franco's avatar
      Remove weak-list of optimized JS functions. · f0acede9
      Juliana Franco authored 
      This CL removes the weak-list of JS functions from the context
and all the code that iterares over it. This list was being used
mainly during deoptimization (for code unlinking) and during
garbage collection. Removing it will improve performance of
programs that create many closures and trigger many scavenge GC
cycles.

No extra work is required during garbage collection. However,
given that we no longer unlink code from JS functions during
deoptimization, we leave it as it is, and on its next activation
we check whether the mark_for_deoptimization bit of that code is
set, and if it is, than we unlink it and jump to lazy compiled
code. This check happens in the prologue of every code object.
 
We needed to change/remove the cctests that used to check
something on this list.
 
Working in x64, ia32, arm64, arm, mips64 and mips. 
 

Bug: v8:6637
Change-Id: Ica99a12fd0351ae985e9a287918bf28caf6d2e24
TBR: mstarzinger@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/647596
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
Reviewed-by: 's avatarJaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47808}
      f0acede9
  71. 04 Sep, 2017 1 commit
    • Michael Achenbach's avatar
      Revert "Remove weak-list of optimized JS functions." · 36b50283
      Michael Achenbach authored 
      This reverts commit 84c2dfce.

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/14876

Original change's description:
> Remove weak-list of optimized JS functions.
> 
> This CL removes the weak-list of JS functions from the context
> and all the code that iterares over it. This list was being used
> mainly during deoptimization (for code unlinking) and during
> garbage collection. Removing it will improve performance of
> programs that create many closures and trigger many scavenge GC
> cycles.
> 
> No extra work is required during garbage collection. However,
> given that we no longer unlink code from JS functions during
> deoptimization, we leave it as it is, and on its next activation
> we check whether the mark_for_deoptimization bit of that code is
> set, and if it is, than we unlink it and jump to lazy compiled
> code. This check happens in the prologue of every code object.
> 
> We needed to change/remove the cctests that used to check
> something on this list.
> 
> Working in x64, ia32, arm64, arm, mips64 and mips. 
> 
> Bug: v8:6637
> Change-Id: I7f192652c8034b16a9ea71303fa8e78cda3c48f3
> Reviewed-on: https://chromium-review.googlesource.com/600427
> Commit-Queue: Juliana Patricia Vicente Franco <jupvfranco@google.com>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47790}

TBR=mstarzinger@chromium.org,jarin@chromium.org,leszeks@chromium.org,bmeurer@chromium.org,jupvfranco@google.com

Change-Id: Ia4f1a8acf6ca5cd5c74266437a03d854b3739af2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6637
Reviewed-on: https://chromium-review.googlesource.com/647540Reviewed-by: 's avatarMichael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47792}
      36b50283