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  1. 23 Aug, 2022 4 commits
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  9. 19 Aug, 2022 2 commits
    • Shu-yu Guo's avatar
      Revert "[compiler] Make ReduceWord32EqualForConstantRhs work for Word64Equal" · d4a8f1a4
      Shu-yu Guo authored 
      This reverts commit abd0adf1.

Reason for revert: Test times out on Win64
https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Win64%20-%20msvc/23024/overview

Original change's description:
> [compiler] Make ReduceWord32EqualForConstantRhs work for Word64Equal
>
> Adds reduction case in MachineOperatorReducer for when the left-hand side of a
> Word64Equals is based on a 64-bit shift-and-mask operation, as is the case
> when Torque accesses 64-bit bitfields.
>
> This improves Speedometer2 by 0.15% on a Neoverse-N1 machine, with
> React-Redux being improved by 0.4%.
>
> Change-Id: Icd0451c00c1b25f7d370e81bddcfd668a5b2523c
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3834027
> Commit-Queue: George Wort <george.wort@arm.com>
> Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#82593}

Change-Id: I26515348a3d8de58445ecddc0486d9fcc2711cec
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3839048
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Shu-yu Guo <syg@chromium.org>
Owners-Override: Shu-yu Guo <syg@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#82603}
      d4a8f1a4
    • Clemens Backes's avatar
      [wasm] Avoid taking a mutex during Liftoff compilation · 660938b7
      Clemens Backes authored 
      The mutex is there to protect against concurrent compilation of the same
function. It can be avoided by accumulating the vector of call targets
locally in the LiftoffCompiler, and only transferring it to the stored
type feedback once at the end (under the mutex).

Also, choose slightly better data structures: base::OwnedVector uses
less memory that std::vector (because it never over-reserves), and
std::unordered_map is more memory efficient and faster to lookup that
{std::map}.

R=jkummerow@chromium.org

Bug: v8:13209
Change-Id: I7aa82560a83cbac5c019effc7fd38c9b1495a42c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3840294
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: 's avatarJakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#82602}
      660938b7