[webkit-changes] [WebKit/WebKit] 5e4e34: [JSC] Add a bit adhoc Int52 <-> Int32 round-trip o...

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 5e4e34976b1cefbe593516a4aeb100516497cfd9
      https://github.com/WebKit/WebKit/commit/5e4e34976b1cefbe593516a4aeb100516497cfd9
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2025-02-01 (Sat, 01 Feb 2025)

  Changed paths:
    M Source/JavaScriptCore/b3/B3ReduceStrength.cpp
    M Source/JavaScriptCore/b3/testb3.h
    M Source/JavaScriptCore/b3/testb3_1.cpp
    M Source/JavaScriptCore/b3/testb3_7.cpp

  Log Message:
  -----------
  [JSC] Add a bit adhoc Int52 <-> Int32 round-trip optimization
https://bugs.webkit.org/show_bug.cgi?id=286243
rdar://143241302

Reviewed by Justin Michaud and Yijia Huang.

This patch adhocly reduces Int52 <-> Int32 round-trips. In B3, we detect
meaningless Int52 promotion and demotion and remove them via pattern
matching.

* Source/JavaScriptCore/b3/B3ReduceStrength.cpp:
* Source/JavaScriptCore/b3/testb3.h:
* Source/JavaScriptCore/b3/testb3_1.cpp:
(run):
* Source/JavaScriptCore/b3/testb3_7.cpp:
(testInt52RoundTripUnary):
(testInt52RoundTripBinary):

Canonical link: https://commits.webkit.org/289679@main



To unsubscribe from these emails, change your notification settings at https://github.com/WebKit/WebKit/settings/notifications