Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: cd30bb7e410f12481f5330a896e72cd569eb7ee2
      
https://github.com/WebKit/WebKit/commit/cd30bb7e410f12481f5330a896e72cd569eb7ee2
  Author: Yusuke Suzuki <[email protected]>
  Date:   2026-09-02 (Wed, 02 Sep 2026)

  Changed paths:
    A JSTests/stress/object-create-check-insertion.js
    M Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp

  Log Message:
  -----------
  [JSC] ObjectCreate folding should emit checks
https://bugs.webkit.org/show_bug.cgi?id=317570
rdar://178248992

Reviewed by Yijia Huang.

When folding ObjectCreate(with-edge-checks), we are not emitting these
checks and converting it to NewObject. As a result, we missed the edge
filters and the subsequent code may rely on that. This patch correctly
inserts these checks.

Test: JSTests/stress/object-create-check-insertion.js

* JSTests/stress/object-create-check-insertion.js: Added.
(bitsToDouble):
(enforce):
(getKey):
(getK2):
(caller):
(trainGetKey):
(trainCaller):
(trainGetK2):
(ramp):
* Source/JavaScriptCore/dfg/DFGConstantFoldingPhase.cpp:
(JSC::DFG::ConstantFoldingPhase::foldConstants):

Originally-landed-as: [email protected] (ac9e40a7195b). 
rdar://185368518
Canonical link: https://commits.webkit.org/320366@main



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