https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118759
Bug ID: 118759
Summary: [15 regression] ICE when building openmsx-19.1
(exact_div, at poly-int.h:2160)
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: sjames at gcc dot gnu.org
Target Milestone: ---
Created attachment 60384
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60384&action=edit
Scaler2.cc.ii.xz
Originally reported downstream in Gentoo at https://bugs.gentoo.org/949343.
```
$ g++ -c Scaler2.cc.ii -std=c++20 -march=znver2 -O3
during GIMPLE pass: vect
In file included from src/video/scalers/Scaler2.cc:2:
src/video/scalers/LineScalers.hh: In function ‘void
openmsx::Scale_1on2<Pixel>::operator()(std::span<const Pixel>, std::span<_Type,
18446744073709551615>) [with Pixel = short unsigned int]’:
src/video/scalers/LineScalers.hh:458:6: internal compiler error: in exact_div,
at poly-int.h:2160
0x602ba61b318a internal_error(char const*, ...)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/diagnostic-global-context.cc:517
0x602ba61b3325 fancy_abort(char const*, int, char const*)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/diagnostic.cc:1722
0x602ba4c62233 poly_int<1u, poly_result<unsigned long, if_nonpoly<unsigned
long, unsigned long, poly_int_traits<unsigned long>::is_poly>::type,
poly_coeff_pair_traits<unsigned long, if_nonpoly<unsigned long, unsigned long,
poly_int_traits<unsigned long>::is_poly>::type>::result_kind>::type>
exact_div<1u, unsigned long, unsigned long>(poly_int<1u, unsigned long> const&,
unsigned long) [clone .isra.0]
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/poly-int.h:2160
0x602ba6d48096 poly_int<1u, poly_result<unsigned long, unsigned long,
poly_coeff_pair_traits<unsigned long, unsigned long>::result_kind>::type>
exact_div<1u, unsigned long, unsigned long>(poly_int<1u, unsigned long> const&,
poly_int<1u, unsigned long> const&)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/poly-int.h:2173
0x602ba6d48096 vect_get_num_vectors(poly_int<1u, unsigned long>, tree_node*)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vectorizer.h:2119
0x602ba6d402f9 vect_compute_data_ref_alignment
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-data-refs.cc:1388
0x602ba6adbccd vect_analyze_data_refs_alignment(_loop_vec_info*)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-data-refs.cc:2946
0x602ba6d8f3a0 vect_analyze_loop_2
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-loop.cc:2960
0x602ba6d8d43c vect_analyze_loop_1
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-loop.cc:3479
0x602ba6a84199 vect_analyze_loop(loop*, gimple*, vec_info_shared*)
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vect-loop.cc:3639
0x602ba6d8bdea try_vectorize_loop_1
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vectorizer.cc:1095
0x602ba6d8bdea try_vectorize_loop
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vectorizer.cc:1212
0x602ba6a553c3 execute
/usr/src/debug/sys-devel/gcc-15.0.9999/gcc-15.0.9999/gcc/tree-vectorizer.cc:1328
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://bugs.gentoo.org/> for instructions.
```
```
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/15/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-15.0.9999/work/gcc-15.0.9999/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/15
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/15/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/15/include/g++-v15
--disable-silent-rules --disable-dependency-tracking
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/15/python
--enable-objc-gc --enable-languages=c,c++,d,go,objc,obj-c++,fortran,ada,m2,rust
--enable-obsolete --enable-secureplt --disable-werror --with-system-zlib
--enable-nls --without-included-gettext --disable-libunwind-exceptions
--enable-checking=yes,extra,rtl --with-bugurl=https://bugs.gentoo.org/
--with-pkgversion='Gentoo Hardened 15.0.9999 p, commit
601d2479a8464e3bf1fb53065109a027db7c93f1' --with-gcc-major-version-only
--enable-libstdcxx-time --enable-lto --disable-libstdcxx-pch --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
--enable-multilib --with-multilib-list=m32,m64 --disable-fixed-point
--enable-targets=all --enable-offload-defaulted
--enable-offload-targets=nvptx-none --enable-libgomp --disable-libssp
--enable-libada --disable-cet --disable-systemtap --enable-valgrind-annotations
--disable-vtable-verify --disable-libvtv --with-zstd --with-isl
--disable-isl-version-check --enable-default-pie --enable-host-pie
--enable-host-bind-now --enable-default-ssp --disable-fixincludes
--with-build-config='bootstrap-O3 bootstrap-lto'
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.0.1 20250204 (experimental)
4b2726a62ddfe958302d6790725503ac09b28f11 (Gentoo Hardened 15.0.9999 p, commit
601d2479a8464e3bf1fb53065109a027db7c93f1)
```
