[webkit-changes] [WebKit/WebKit] 4b5c73: [JSC] Use normal ImpureNaN propagation for Negatio...

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 4b5c73a50f805ea1bb49c5dba2634d7d22222e19
      https://github.com/WebKit/WebKit/commit/4b5c73a50f805ea1bb49c5dba2634d7d22222e19
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2025-03-24 (Mon, 24 Mar 2025)

  Changed paths:
    M Source/JavaScriptCore/bytecode/SpeculatedType.cpp
    M Source/JavaScriptCore/runtime/JSCJSValue.h
    M Source/JavaScriptCore/runtime/PureNaN.h

  Log Message:
  -----------
  [JSC] Use normal ImpureNaN propagation for Negation / Abs / Rounding
https://bugs.webkit.org/show_bug.cgi?id=290275
rdar://147666753

Reviewed by Keith Miller.

We can just follow to the rule we are using in C++. Negation, Abs,
Rounding should pollute the result only when we can see ImpureNaN.

* Source/JavaScriptCore/bytecode/SpeculatedType.cpp:
(JSC::typeOfDoubleNegation):
(JSC::typeOfDoubleRounding):
* Source/JavaScriptCore/runtime/JSCJSValue.h:
* Source/JavaScriptCore/runtime/PureNaN.h:
(JSC::isImpureNaN):

Canonical link: https://commits.webkit.org/292606@main



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