[Webkit-unassigned] [Bug 258557] New: __builtin_popcount and __builtin_popcountll are not defined by MSVC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258557

            Bug ID: 258557
           Summary: __builtin_popcount and __builtin_popcountll are not
                    defined by MSVC
           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: Ryuichi.Hayashida at sony.com

__builtin_popcount and __builtin_popcountll are builtin functions provided by Clang and GCC, but MSVC doesn't provide the same function. Instead, __popcnt and __popcnt64 should be used when building WebKit for Windows.

https://learn.microsoft.com/en-us/cpp/intrinsics/popcnt16-popcnt-popcnt64?view=msvc-170

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