[webkit-changes] [WebKit/WebKit] b3a4a4: [JSC] LLInt slow path of op_iterator_next doesn't ...

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  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: b3a4a487b56ade502613ebf7e0136f35ba68fa84
      https://github.com/WebKit/WebKit/commit/b3a4a487b56ade502613ebf7e0136f35ba68fa84
  Author: Alexey Shvayka <ashvayka at apple.com>
  Date:   2023-08-31 (Thu, 31 Aug 2023)

  Changed paths:
    A JSTests/stress/regress-260980.js
    M Source/JavaScriptCore/llint/LLIntSlowPaths.cpp

  Log Message:
  -----------
  [JSC] LLInt slow path of op_iterator_next doesn't always check m_done value
https://bugs.webkit.org/show_bug.cgi?id=260980
<rdar://114745586>

Reviewed by Mark Lam.

Before this change, if `iteratorResult.done` wasn't of boolean type, its value wasn't checked.
This patch adds ToBoolean coercion and the missing check, aligning JSC with V8 and SpiderMonkey.

* Source/JavaScriptCore/llint/LLIntSlowPaths.cpp:
(JSC::LLInt::LLINT_SLOW_PATH_DECL):
* JSTests/stress/regress-260980.js: Added.

Canonical link: https://commits.webkit.org/267526@main