[Webkit-unassigned] [Bug 172306] New: B3::Value::effects() says that having a fence range implies the fence bit, but on x86_64 we lower loadAcq/storeRel to load/store so the store-before-load fence bit orderings won't be honored

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172306

            Bug ID: 172306
           Summary: B3::Value::effects() says that having a fence range
                    implies the fence bit, but on x86_64 we lower
                    loadAcq/storeRel to load/store so the
                    store-before-load fence bit orderings won't be honored
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: fpizlo at apple.com

As the title says.

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