tree 1beeec4b52d85f0e084f05217acd8f5cc17f20b9
parent 83378633e1fc8b758c9edcadba13452aad75d750
author Martin Kustermann <kustermann@google.com> 1583835330 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1583835330 +0000

Revert "Re-land "[vm] Aggressive write-barrier elimination.""

This reverts commit eff1a9ff9706f2f6285668f6d0e2c44c42518aac.

Reason for revert:
  Causes flaky hits of RELEASE_ASSERT in marker.cc, see b/151131634.

Original change's description:
> Re-land "[vm] Aggressive write-barrier elimination."
> 
> The original revision is in Patchset 3.
> 
> Four bugs were fixed:
> 
> 1. JoinEntryInstr::SuccessorCount() is not the correct way to get the
>    number of successor blocks from the Join block;
>    JoinEntryInstr::last_instruction()->SuccessorCount() must be used
>    instead.
> 
> 2. BitVector::Equals() was non-deterministically returning 'false'
>    for equal vectors.
> 
> 3. All blocks need to be processed at least once during the Analysis
>    phase (not only in the SaveResults phase).
> 
> 4. We were not removing write barriers from StoreIndexed instructions,
>    even though we had support for it.
> 
> This reverts commit 7fd8ad5a2d233137920fe20390f08646bfdafeca.
> 
> Fixes https://github.com/dart-lang/sdk/issues/40780
> 
> Change-Id: I9650ec2c547ec49cf88ca0524e14f6c245621f6a
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/138086
> Commit-Queue: Samir Jindel <sjindel@google.com>
> Reviewed-by: Martin Kustermann <kustermann@google.com>
> Reviewed-by: Ryan Macnak <rmacnak@google.com>

TBR=kustermann@google.com,rmacnak@google.com,sjindel@google.com

Change-Id: If9afd84465175fad2431405a97e9293c8bd5e476
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/138808
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>