[llvm-bugs] [Bug 35251] New: _InterlockedCompareExchange128 not implemented on Windows

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35251

            Bug ID: 35251
           Summary: _InterlockedCompareExchange128 not implemented on
                    Windows
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: colden at coldencullen.com
                CC: llvm-bugs at lists.llvm.org

_InterlockedCompareExchange128 (an MSVC intrinsic) is declared on line 280 of
intrin.h, but there is no implementation (that I could find), and using:
#pragma intrinsic(_InterlockedCompareExchange128)

Produces:
 error: '_InterlockedCompareExchange128' is not a recognized builtin; consider
including <intrin.h> to access non-builtin intrinsics
[-Werror,-Wignored-pragma-intrinsic]
                #pragma intrinsic(_InterlockedCompareExchange128)

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