https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104409
Bug ID: 104409
Summary: [Aarch64] Crash when compiling source code of any
significant size with -march=armv8.7-a
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: gabravier at gmail dot com
Target Milestone: ---
Created attachment 52361
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52361&action=edit
Preprocessed minimal code that triggers the crash
It appears that using `-march=armv8.7-a` on code of any significant size
quickly results in a crash. Compiling the attached code with that option
results in a crash on Godbolt's trunk build (updated as of sometime today) of
Aarch64 GCC (here's a Godbolt link if you want to see it reproduced there, btw:
https://godbolt.org/z/GWh1r6MWj)
The complete command line is this: `aarch64-linux-gnu-g++ -g -o
/tmp/compiler-explorer-compiler202216-6419-6qrckn.k4c16/output.s -S
-fdiagnostics-color=always -march=armv8.7-a -v
/tmp/compiler-explorer-compiler202216-6419-6qrckn.k4c16/example.cpp`
The compiler output is this:
<source>:2280:5: internal compiler error: Segmentation fault
2280 | }
| ^
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
The information from gcc -v is this:
Using built-in specs.
COLLECT_GCC=/opt/compiler-explorer/arm64/gcc-trunk/aarch64-unknown-linux-gnu/bin/aarch64-unknown-linux-gnu-g++
Target: aarch64-unknown-linux-gnu
Configured with: /opt/.build/aarch64-unknown-linux-gnu/src/gcc/configure
--build=x86_64-build_pc-linux-gnu --host=x86_64-build_pc-linux-gnu
--target=aarch64-unknown-linux-gnu
--prefix=/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu
--exec_prefix=/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu
--with-sysroot=/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/sysroot
--enable-languages=c,c++,fortran --enable-__cxa_atexit --disable-libmudflap
--enable-libgomp --enable-libssp --enable-libquadmath
--enable-libquadmath-support --enable-libsanitizer --disable-libmpx
--with-gmp=/opt/.build/aarch64-unknown-linux-gnu/buildtools
--with-mpfr=/opt/.build/aarch64-unknown-linux-gnu/buildtools
--with-mpc=/opt/.build/aarch64-unknown-linux-gnu/buildtools
--with-isl=/opt/.build/aarch64-unknown-linux-gnu/buildtools --disable-lto
--without-zstd --enable-threads=posix --enable-target-optspace --disable-plugin
--disable-nls --disable-multilib
--with-local-prefix=/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/sysroot
--enable-long-long
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.1 20220206 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-fdiagnostics-color=always' '-g' '-o' '/app/output.s' '-S'
'-march=armv8.7-a' '-v' '-shared-libgcc' '-mlittle-endian' '-mabi=lp64'
'-dumpdir' '/app/'
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/libexec/gcc/aarch64-unknown-linux-gnu/12.0.1/cc1plus
-quiet -v -D_GNU_SOURCE <source> -quiet -dumpdir /app/ -dumpbase output.cpp
-dumpbase-ext .cpp -march=armv8.7-a -mlittle-endian -mabi=lp64 -g -version
-fdiagnostics-color=always -o /app/output.s
GNU C++17 (GCC) version 12.0.1 20220206 (experimental)
(aarch64-unknown-linux-gnu)
compiled by GNU C version 7.5.0, GMP version 6.1.2, MPFR version 4.0.2,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory
"/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/sysroot/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/sysroot/include"
#include "..." search starts here:
#include <...> search starts here:
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/lib/gcc/aarch64-unknown-linux-gnu/12.0.1/../../../../aarch64-unknown-linux-gnu/include/c++/12.0.1
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/lib/gcc/aarch64-unknown-linux-gnu/12.0.1/../../../../aarch64-unknown-linux-gnu/include/c++/12.0.1/aarch64-unknown-linux-gnu
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/lib/gcc/aarch64-unknown-linux-gnu/12.0.1/../../../../aarch64-unknown-linux-gnu/include/c++/12.0.1/backward
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/lib/gcc/aarch64-unknown-linux-gnu/12.0.1/include
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/lib/gcc/aarch64-unknown-linux-gnu/12.0.1/include-fixed
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/lib/gcc/aarch64-unknown-linux-gnu/12.0.1/../../../../aarch64-unknown-linux-gnu/include
/opt/compiler-explorer/arm64/gcc-trunk-20220206/aarch64-unknown-linux-gnu/aarch64-unknown-linux-gnu/sysroot/usr/include
End of search list.
GNU C++17 (GCC) version 12.0.1 20220206 (experimental)
(aarch64-unknown-linux-gnu)
compiled by GNU C version 7.5.0, GMP version 6.1.2, MPFR version 4.0.2,
MPC version 1.1.0, isl version isl-0.19-GMP
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: b30bfe5a5b063f6ba9d394e1fcceb1ed
