[Webkit-unassigned] [Bug 274064] New: [Win] Use SystemV ABI for C++ entrypoints for JS LLInt

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=274064

            Bug ID: 274064
           Summary: [Win] Use SystemV ABI for C++ entrypoints for JS LLInt
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Windows 10
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ian.grunert at gmail.com

clang-cl gives us the option of changing a function to use the SystemV ABI:

https://clang.llvm.org/docs/AttributeReference.html#sysv-abi

By using this on functions on the C++ / JIT boundaries, we can use the same codepaths for function calls and the same register mappings between Windows and Linux / Mac / BSD.

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