Bug#1017765: (no subject)

[Jochen Sprickerhof]

Control: affects -1 - libeigen3-dev src:pcl

Hi Sylvestre,

Anton added an upstream patch to libeigen3-dev to work around this:

https://gitlab.com/libeigen/eigen/-/commit/fb05198bddcc21b97232df5f4000583d66d033b3



Cheers Jochen

* Jochen Sprickerhof <jspri...@debian.org> [2022-08-20 12:09]:

I don't have enough insights if this is actually a bug in clang or rather something that used to work but should not, so feel free to close.

Hi Sylvestre,,

* Sylvestre Ledru <sylves...@debian.org> [2022-08-19 23:46]:

Could you please provide a reduce test case?

Sure, this produces the same error with clang++-14 on armel but works with
clang++-13 and gcc:

template <typename Packet> void psincos_float(Packet &_x) {
 __asm__("" : "+g,w"(_x));
}
int main() {}

Some context to the function is here:

https://gitlab.com/libeigen/eigen/-/commit/82d61af3a490154ad1c0ae2fe00c561095854897#859198abc81bc7db86d6add0a16b27c957a7358b_1066_1070

Cheers Jochen

* Sylvestre Ledru <sylves...@debian.org> [2022-08-19 23:46]:

Hello

Could you please provide a reduce test case?

Thanks
Sylvestre
On 2022-08-19 23:34, Jochen Sprickerhof wrote:

Package: clang-14
Version: 1:14.0.6-2
Severity: normal
X-Debbugs-Cc: jspri...@debian.org
Control: affects -1 libeigen3-dev src:pcl

Hi,

on an up to date armel:

jspricke@harris:~$ dd-schroot-cmd -c $sessionid apt-get install
clang-13 clang-14 libeigen3-dev
(sid_armel-dchroot)jspricke@harris:~$ echo -e "#include
<Eigen/Core>\nint main() {}" > eigen.cpp
(sid_armel-dchroot)jspricke@harris:~$ clang++-14 -I
/usr/include/eigen3 eigen.cpp
In file included from eigen.cpp:1:
In file included from /usr/include/eigen3/Eigen/Core:250:
/usr/include/eigen3/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h:641:3:
error: invalid output constraint '+g,w' in asm
EIGEN_OPTIMIZATION_BARRIER(y_round)
^
/usr/include/eigen3/Eigen/src/Core/util/Macros.h:1134:61: note:
expanded from macro 'EIGEN_OPTIMIZATION_BARRIER'

                                                          ^
In file included from eigen.cpp:1:
In file included from /usr/include/eigen3/Eigen/Core:250:
/usr/include/eigen3/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h:663:3:
error: invalid output constraint '+g,w' in asm
EIGEN_OPTIMIZATION_BARRIER(x)
^
/usr/include/eigen3/Eigen/src/Core/util/Macros.h:1134:61: note:
expanded from macro 'EIGEN_OPTIMIZATION_BARRIER'

                                                          ^
In file included from eigen.cpp:1:
In file included from /usr/include/eigen3/Eigen/Core:250:
/usr/include/eigen3/Eigen/src/Core/arch/Default/GenericPacketMathFunctions.h:665:3:
error: invalid output constraint '+g,w' in asm
EIGEN_OPTIMIZATION_BARRIER(x)
^
/usr/include/eigen3/Eigen/src/Core/util/Macros.h:1134:61: note:
expanded from macro 'EIGEN_OPTIMIZATION_BARRIER'

                                                          ^
3 errors generated.

(sid_armel-dchroot)jspricke@harris:~$ clang++-13 -I
/usr/include/eigen3 eigen.cpp


This currently breaks src:pcl, can you have a look?

Cheers Jochen


-- System Information:
Debian Release: bookworm/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable')
merged-usr: no
Architecture: armel (armv7l)

Kernel: Linux 4.19.0-21-armmp (SMP w/1 CPU thread)
Kernel taint flags: TAINT_DIE
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: unable to detect

Versions of packages clang-14 depends on:
ii  binutils                2.38.90.20220713-2
ii  libatomic1              12.1.0-8
ii  libc6                   2.34-4
ii  libc6-dev               2.34-4
ii  libclang-common-14-dev  1:14.0.6-2
ii  libclang-cpp14          1:14.0.6-2
ii  libclang1-14            1:14.0.6-2
ii  libgcc-12-dev           12.1.0-8
ii  libgcc-s1               12.1.0-8
ii  libllvm14               1:14.0.6-2
ii  libobjc-12-dev          12.1.0-8
ii  libstdc++-12-dev        12.1.0-8
ii  libstdc++6              12.1.0-8
ii  llvm-14-linker-tools    1:14.0.6-2

Versions of packages clang-14 recommends:
pn  llvm-14-dev  <none>
ii  python3      3.10.6-1

Versions of packages clang-14 suggests:
pn  clang-14-doc  <none>

-- no debconf information

#define EIGEN_OPTIMIZATION_BARRIER(X) __asm__ ("" : "+g,w" (X)); #define EIGEN_OPTIMIZATION_BARRIER(X) __asm__ ("" : "+g,w" (X)); #define EIGEN_OPTIMIZATION_BARRIER(X) __asm__ ("" : "+g,w" (X)); (sid_armel-dchroot)jspricke@harris:~$ g++ -I /usr/include/eigen3 eigen.cpp

signature.asc
Description: PGP signature