[llvm-bugs] [Bug 34602] New: Clang-CL __noop intrinsic attempts to use copy constructor

via llvm-bugs llvm-bugs at lists.llvm.org
Thu Sep 14 07:55:30 PDT 2017


https://bugs.llvm.org/show_bug.cgi?id=34602

            Bug ID: 34602
           Summary: Clang-CL __noop intrinsic attempts to use copy
                    constructor
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Driver
          Assignee: unassignedclangbugs at nondot.org
          Reporter: steveire at gmail.com
                CC: llvm-bugs at lists.llvm.org

MSVC compiles the following code, but Clang-CL rejects it:

class NonCopyable
{
public:
        NonCopyable() {}

        NonCopyable(const NonCopyable& other) = delete;
        NonCopyable& operator=(const NonCopyable& other) = delete;

        NonCopyable(const NonCopyable&& other) {}
        NonCopyable& operator=(const NonCopyable&& other) {}
};

int main()
{
        NonCopyable nc;
        __noop(nc);

        return 0;
}

....

C:\dev\src\playground\cpp\foo.cpp(17,9): error : call to deleted constructor of
'NonCopyable' [C:\dev\src\playground\cpp\build\cpptests.vcxproj]
          __noop(nc);
                 ^~
  C:\dev\src\playground\cpp\foo.cpp(7,2):  note: 'NonCopyable' has been
explicitly marked deleted here
          NonCopyable(const NonCopyable& other) = delete;
          ^
  3 warnings and 1 error generated.

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