https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79124
Bug ID: 79124
Summary: Internal compiler error under certain cases where
__attribute__((target("avx2"))) presents
Product: gcc
Version: 5.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: weiming at megvii dot com
Target Milestone: ---
Created attachment 40532
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40532&action=edit
The failed code snippet
Compiling the attached code snippet can trigger an internal compiler error.
Note that -mavx2 option is not passed through the command line; instead, we use
__attribute__((target("avx2"))) to enable avx2 support for the designated
function.
Command line:
g++-5 main.cpp -O2 -g -Wall -Wextra
Output:
main.cpp: In function ‘__m256 log256_ps(__m256)’:
main.cpp:4:8: internal compiler error: in expand_debug_locations, at
cfgexpand.c:5118
__m256 log256_ps(__m256 x)
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-5/README.Bugs> for instructions.
Output of g++-v:
Using built-in specs.
COLLECT_GCC=g++-5
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 5.4.1-4'
--with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs
--enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-5 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home
--with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64
--with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
--enable-objc-gc --enable-multiarch --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.1 20161202 (Debian 5.4.1-4)
