[Webkit-unassigned] [Bug 209832] New: [JSC] Introduce UCPUStrictInt32 for result type of DFG operations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=209832

            Bug ID: 209832
           Summary: [JSC] Introduce UCPUStrictInt32 for result type of DFG
                    operations
           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: ysuzuki at apple.com

x64 ABI does not ensure that high 32bits of register is cleared when it is used as a result of `int32_t` operation. So it is possible that this includes garbage.

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