[cfe-dev] clang-cl and intrinsics

[Reid Kleckner via cfe-dev]

This looks like skew between the compiler headers and the compiler. Both
those builtins were added in the November / October time frame, so an old
clang wouldn't know about them.

Are you sure you made a symlink from cl.exe to clang-cl.exe and not a copy?
Check if "D:\dev\private\llvm-trunk\out\reldbg\bin\cl.exe --version" and "
D:\dev\private\llvm-trunk\out\reldbg\bin\clang.exe --version" agree.

On Sun, Dec 13, 2015 at 9:42 PM, Kim Gräsman <cfe-dev at lists.llvm.org> wrote:

> Hi all,
>
> I'm trying to use clang-cl on Windows to be able to use ASAN. The
> build system I'm using is a little wonky, so I worked around it by
> putting the Clang build output dir in the executable search path, and
> creating a link from cl.exe -> clang-cl.exe there.
>
> So far, so good -- clang-cl is compiling the code when I build from
> Visual Studio.
>
> But as soon as it hits an <ostream> include, I get build errors from
> Clang's intrinsics headers, e.g.:
>
> 1>  In file included from C:\project\t.cpp:1:
> 1>  In file included from C:\project\t.h:5:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\ostream:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\ios:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xlocnum:10:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\streambuf:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xiosbase:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xlocale:8:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\stdexcept:7:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xstring:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xmemory0:942:
> 1>  In file included from
>
> D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\intrin.h:34:
> 1>  In file included from
>
> D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\x86intrin.h:29:
> 1>  In file included from
>
> D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\immintrin.h:31:
>
> 1>D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\emmintrin.h(1484,3):
> error : use of undeclared identifier '__builtin_ia32_pause'
> 1>    __builtin_ia32_pause();
> 1>    ^
>
> 1>  In file included from C:\project\t.cpp:1:
> 1>  In file included from C:\project\t.h:5:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\ostream:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\ios:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xlocnum:10:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\streambuf:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xiosbase:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xlocale:8:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\stdexcept:7:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xstring:6:
> 1>  In file included from C:\Program Files (x86)\Microsoft Visual
> Studio 11.0\VC\include\xmemory0:942:
> 1>  In file included from
>
> D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\intrin.h:34:
> 1>  In file included from
>
> D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\x86intrin.h:29:
> 1>  In file included from
>
> D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\immintrin.h:37:
>
> 1>D:\dev\private\llvm-trunk\out\reldbg\bin\..\lib\clang\3.8.0\include\smmintrin.h(146,45):
> error : cannot initialize a parameter of type
> '__attribute__((__vector_size__(2 * sizeof(long long)))) long long *'
> with an rvalue of type 'const __v2di *'
> 1>    return (__m128i) __builtin_ia32_movntdqa ((const __v2di *) __V);
> 1>                                              ^~~~~~~~~~~~~~~~~~~~
>
> Did I miss anything here? I'm not telling clang-cl anything about
> target, I did try passing various /arch: arguments without any
> success.
>
> Thanks for any ideas!
>
> - Kim
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