[webkit-changes] [WebKit/WebKit] 05eebf: [JSC] Micro-optimize stricteq in Baseline JIT with...

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 05eebf3077771836e4602ceaac0926ba9d5367b7
      https://github.com/WebKit/WebKit/commit/05eebf3077771836e4602ceaac0926ba9d5367b7
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2024-04-22 (Mon, 22 Apr 2024)

  Changed paths:
    A JSTests/stress/jstrict-eq-constant-simple.js
    A JSTests/stress/jstrict-neq-constant-simple.js
    A JSTests/stress/strict-eq-constant-simple.js
    A JSTests/stress/strict-neq-constant-simple.js
    M Source/JavaScriptCore/jit/JITOpcodes.cpp

  Log Message:
  -----------
  [JSC] Micro-optimize stricteq in Baseline JIT with bitwise-comparable constants
https://bugs.webkit.org/show_bug.cgi?id=272948
rdar://126726702

Reviewed by Keith Miller.

We observed stricteq with true / false / void 0 / null cases in the wild, so let's have some optimized code generation even in baseline JIT since it is simple.

* JSTests/stress/jstrict-eq-constant-simple.js: Added.
(shouldBe):
(test1):
(test2):
(test3):
(test4):
* JSTests/stress/jstrict-neq-constant-simple.js: Added.
(shouldBe):
(test1):
(test2):
(test3):
(test4):
* JSTests/stress/strict-eq-constant-simple.js: Added.
(shouldBe):
(test1):
(test2):
(test3):
(test4):
* JSTests/stress/strict-neq-constant-simple.js: Added.
(shouldBe):
(test1):
(test2):
(test3):
(test4):
* Source/JavaScriptCore/jit/JITOpcodes.cpp:
(JSC::JIT::compileOpStrictEq):
(JSC::JIT::compileOpStrictEqJump):

Canonical link: https://commits.webkit.org/277852@main



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