[Webkit-unassigned] [Bug 174232] New: Reimplement bmalloc::log2 for MSVC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=174232

            Bug ID: 174232
           Summary: Reimplement bmalloc::log2 for MSVC
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: bmalloc
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: daewoong.jang at navercorp.com
                CC: ggaren at apple.com

Rewrite bmalloc::log2() in a recursive fashion as MSVC does not have __builtin_clzl nor exact equivalent of it.
This change is needed for supporting bmalloc on Windows(https://bugs.webkit.org/show_bug.cgi?id=143310).

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