https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115397
Bug ID: 115397 Summary: [15 Regression] ICE 'during RTL pass: split1' on numpy-1.26.4 i686-linux '-fPIC -mavx512f' Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: slyfox at gcc dot gnu.org Target Milestone: --- Noticed on gcc master from r15-1111-ge22b7f741ab54f today. There numpy on i686-linux ICEs. Extracted example: // $ cat bug.c.c int LONG_divide_AVX512F_dimensions_0; void npy_set_floatstatus_overflow(); void LONG_divide_AVX512F() { long *src; int raise_err = 0; for (; LONG_divide_AVX512F_dimensions_0; --LONG_divide_AVX512F_dimensions_0, ++src) { long a = *src; if (a) raise_err = 1; } if (raise_err) npy_set_floatstatus_overflow(); } Crashing: $ gcc -std=c99 -fPIC -mavx512f -c bug.c.c -o bug.o -O3 during RTL pass: split1 bug.c.c: In function 'LONG_divide_AVX512F': bug.c.c:14:1: internal compiler error: Segmentation fault 14 | } | ^ 0x9a3deba diagnostic_impl(rich_location*, diagnostic_metadata const*, int, char const*, char**, diagnostic_t) ???:0 0x9a3e33c internal_error(char const*, ...) ???:0 0x898434a crash_signal(int) ???:0 0x8329133 get_pool_constant(rtx_def const*) [clone .cold] ???:0 0x8dbcd04 ix86_broadcast_from_constant(machine_mode, rtx_def*) ???:0 0x8ddee5c ix86_expand_ternlog(machine_mode, rtx_def*, rtx_def*, rtx_def*, int, rtx_def*) ???:0 0x937cdc7 gen_split_1359(rtx_insn*, rtx_def**) ???:0 0x95a1992 split_70(rtx_def*, rtx_insn*) [clone .isra.0] ???:0 0x977abbb split_73(rtx_def*, rtx_insn*) ???:0 0x85793de try_split(rtx_def*, rtx_insn*, int) ???:0 0x88e8db6 split_insn(rtx_insn*) ???:0 0x88ee33e split_all_insns() ???:0 0x88ee3f7 (anonymous namespace)::pass_split_all_insns::execute(function*) ???:0 Please submit a full bug report, with preprocessed source (by using -freport-bug). Please include the complete backtrace with any bug report. See <https://gcc.gnu.org/bugs/> for instructions. $ gcc -v Using built-in specs. COLLECT_GCC=/<<NIX>>/gfortran-15.0.0/bin/gcc COLLECT_LTO_WRAPPER=/<<NIX>>/gfortran-15.0.0/libexec/gcc/i686-unknown-linux-gnu/15.0.0/lto-wrapper Target: i686-unknown-linux-gnu Configured with: ../source/configure --prefix=/<<NIX>>/gfortran-15.0.0 --with-gmp-include=/<<NIX>>/gmp-6.3.0-dev/include --with-gmp-lib=/<<NIX>>/gmp-6.3.0/lib --with-mpfr-include=/<<NIX>>/mpfr-4.2.1-dev/include --with-mpfr-lib=/<<NIX>>/mpfr-4.2.1/lib --with-mpc=/<<NIX>>/libmpc-1.3.1 --with-native-system-header-dir=/<<NIX>>/glibc-2.39-52-dev/include --with-build-sysroot=/ --with-gxx-include-dir=/<<NIX>>/gfortran-15.0.0/include/c++/15.0.0/ --program-prefix= --enable-lto --disable-libstdcxx-pch --without-included-gettext --with-system-zlib --enable-checking=release --enable-static --enable-languages=fortran --disable-multilib --enable-plugin --disable-libcc1 --with-isl=/<<NIX>>/isl-0.20 --with-arch=i686 --build=i686-unknown-linux-gnu --host=i686-unknown-linux-gnu --target=i686-unknown-linux-gnu Thread model: posix Supported LTO compression algorithms: zlib gcc version 15.0.0 99999999 (experimental) (GCC)