[Webkit-unassigned] [Bug 262181] New: [JSC][armv7] Assertion failure in dfg NewMap/NewSet implementations

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Sep 27 06:30:25 PDT 2023


            Bug ID: 262181
           Summary: [JSC][armv7] Assertion failure in dfg NewMap/NewSet
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jgriego at igalia.com


stress/each-block-at-top-of-polymorphic-call-inlining-should-be-exitOK.js.default: ASSERTION FAILED: JSMap::BucketType::offsetOfKey() + 8 == JSMap::BucketType::offsetOfValue()                                                                                                
stress/each-block-at-top-of-polymorphic-call-inlining-should-be-exitOK.js.default: /home/igalia/jgriego/proj/webkit/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp(11937) : void JSC::DFG::SpeculativeJIT::compileNewMap(JSC::DFG::Node*) 

These assertions aren't true on 32-bit and rather than make them portable, I think it makes sense to sink them into the `if CPU(ARM64)` block where they're needed anyways.

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