[Issue 16243] wrong C++ argument passing with empty struct and 6 integers

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16243

Martin Nowak <code at dawg.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|wrong argument passed with  |wrong C++ argument passing
                   |empty struct and 6 integers |with empty struct and 6
                   |                            |integers

--- Comment #1 from Martin Nowak <code at dawg.eu> ---
Complete test case, also requires a C++ roundtrip. C++ compiler is.
----
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin12.2.0
Thread model: posix
----
cat > cpp.cc << CODE
struct S13956
{
};

void check13956(S13956 arg0, int arg1, int arg2, int arg3, int arg4, int arg5,
int arg6);

void func13956(S13956 arg0, int arg1, int arg2, int arg3, int arg4, int arg5,
int arg6)
{
    check13956(arg0, arg1, arg2, arg3, arg4, arg5, arg6);
}
CODE

cat > bug.d << CODE
struct S13956
{
}

extern(C++) void func13956(S13956 arg0, int arg1, int arg2, int arg3, int arg4,
int arg5, int arg6)
{
    check13956(arg0, arg1, arg2, arg3, arg4, arg5, arg6);
}

extern(C++) void check13956(S13956 arg0, int arg1, int arg2, int arg3, int
arg4, int arg5, int arg6)
{
    assert(arg0 == S13956());
    assert(arg1 == 1);
    assert(arg2 == 2);
    assert(arg3 == 3);
    assert(arg4 == 4);
    assert(arg5 == 5);
    assert(arg6 == 6); // fails on OSX 32-bit
}

void main()
{
    func13956(S13956(), 1, 2, 3, 4, 5, 6);
}
CODE

c++ -m32 -c cpp.cc
dmd -m32 cpp.o -run bug

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