Bug 2342604
| Summary: | GCC 15: While compiling embree with tutorials, internal compiler error: Segmentation fault | ||||||
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| Product: | [Fedora] Fedora | Reporter: | Ben Beasley <code> | ||||
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> | ||||
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | rawhide | CC: | dmalcolm, fweimer, jakub, jlaw, josmyers, jwakely, mcermak, mpolacek, msebor, nickc, nixuser, sipoyare | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | gcc-15.0.1-0.5.fc42 | Doc Type: | If docs needed, set a value | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2025-02-01 13:34:33 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Bug Depends On: | |||||||
| Bug Blocks: | 2337588 | ||||||
| Attachments: |
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Reproduced with a cross: $ ./cc1plus -quiet bvh_access.cpp.ii -O3 -flax-vector-conversions -Iinclude -fstack-protector-strong -mbranch-protection=standard -fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fsigned-char -flax-vector-conversions -Wall -Wformat -Wformat-security -Wno-class-memaccess -fno-strict-overflow -fno-delete-null-pointer-checks -fwrapv -fsigned-char -fPIE -fPIC -std=c++11 -fvisibility=hidden -fvisibility-inlines-hidden -fno-strict-aliasing -fno-tree-vectorize during RTL pass: ldp_fusion /root/rpmbuild/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/bvh_access/bvh_access.cpp: In function ‘void embree::print_bvh4_triangle4v(BVHN<4>::NodeRef, size_t)’: /root/rpmbuild/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/bvh_access/bvh_access.cpp:176:3: internal compiler error: Segmentation fault 0x2332b01 internal_error(char const*, ...) /home/mpolacek/src/gcc/gcc/diagnostic-global-context.cc:517 0x1093e4f crash_signal /home/mpolacek/src/gcc/gcc/toplev.cc:322 0x7f00be1df04f ??? /usr/src/debug/glibc-2.40-21.fc41.x86_64/signal/../sysdeps/unix/sysv/linux/x86_64/libc_sigaction.c:0 0x2191150 derived_iterator<rtl_ssa::use_info*, rtl_ssa::access_info* const*>::operator*() const /home/mpolacek/src/gcc/gcc/iterator-utils.h:68 0x2191150 bool rtl_ssa::restrict_movement_for_uses<rtl_ssa::ignore_changing_insns>(rtl_ssa::insn_range_info&, const_derived_container<rtl_ssa::use_info*, array_slice<rtl_ssa::access_info* const> >, rtl_ssa::ignore_changing_insns) /home/mpolacek/src/gcc/gcc/rtl-ssa/movement.h:285 0x2191150 bool rtl_ssa::restrict_movement<rtl_ssa::ignore_changing_insns>(rtl_ssa::insn_change&, rtl_ssa::ignore_changing_insns) /home/mpolacek/src/gcc/gcc/rtl-ssa/change-utils.h:64 0x2199e37 pair_fusion_bb_info::fuse_pair(bool, unsigned int, int, rtl_ssa::insn_info*, rtl_ssa::insn_info*, base_cand&, rtl_ssa::insn_range_info const&) /home/mpolacek/src/gcc/gcc/pair-fusion.cc:1965 0x219d97f pair_fusion_bb_info::try_fuse_pair(bool, unsigned int, rtl_ssa::insn_info*, rtl_ssa::insn_info*) /home/mpolacek/src/gcc/gcc/pair-fusion.cc:2805 0x219de4d pair_fusion_bb_info::merge_pairs(std::__cxx11::list<rtl_ssa::insn_info*, std::allocator<rtl_ssa::insn_info*> >&, std::__cxx11::list<rtl_ssa::insn_info*, std::allocator<rtl_ssa::insn_info*> >&, bool, unsigned int) /home/mpolacek/src/gcc/gcc/pair-fusion.cc:2894 0x219e423 pair_fusion_bb_info::transform_for_base(int, access_group&) /home/mpolacek/src/gcc/gcc/pair-fusion.cc:2927 0x219e423 void pair_fusion_bb_info::traverse_base_map<ordered_hash_map<pair_hash<tree_operand_hash, int_hash<int, -1, -2> >, access_group, simple_hashmap_traits<default_hash_traits<pair_hash<tree_operand_hash, int_hash<int, -1, -2> > >, access_group> > >(ordered_hash_map<pair_hash<tree_operand_hash, int_hash<int, -1, -2> >, access_group, simple_hashmap_traits<default_hash_traits<pair_hash<tree_operand_hash, int_hash<int, -1, -2> > >, access_group> >&) /home/mpolacek/src/gcc/gcc/pair-fusion.cc:2975 0x2193567 pair_fusion_bb_info::transform() /home/mpolacek/src/gcc/gcc/pair-fusion.cc:2982 0x2193567 pair_fusion::process_block(rtl_ssa::bb_info*) /home/mpolacek/src/gcc/gcc/pair-fusion.cc:3110 0x2193a3a pair_fusion::run() /home/mpolacek/src/gcc/gcc/pair-fusion.cc:133 0x1608b22 execute /home/mpolacek/src/gcc/gcc/config/aarch64/aarch64-ldp-fusion.cc:303 I think it's <https://gcc.gnu.org/PR118320>. Do you have preprocessed source for this? I think the PR118320 testcase has the disadvantage that it needs -fno-tree-sra, if we have something without it, that would be better. Created attachment 2074362 [details]
bvh_access.cpp.ii
Here it is. Unfortunately, it's huge :(.
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With GCC 15, on aarch64 only, with the "tutorials" build conditional set in the embree package in Rawhide: [ 73%] Building CXX object tutorials/quaternion_motion_blur/CMakeFiles/embree_quaternion_motion_blur.dir/quaternion_motion_blur.cpp.o cd /builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/quaternion_motion_blur && /usr/bin/g++ -DEMBREE_TARGET_SSE2 -DIMGUI_DISABLE_SSE -DTASKING_TBB -DUSE_GLFW -I/builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3 -I/builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/kernels/../include -I/builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/common/imgui/. -I/builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/common/imgui/./backends -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Wno-complain-wrong-lang -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -mbranch-protection=standard -fasynchronous-unwind-tables -fstack-clash-protection -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -Wl,--as-needed -fsigned-char -flax-vector-conversions -Wall -Wformat -Wformat-security -Wno-class-memaccess -fno-strict-overflow -fno-delete-null-pointer-checks -fwrapv -fsigned-char -fPIE -fPIC -std=c++11 -fvisibility=hidden -fvisibility-inlines-hidden -fno-strict-aliasing -fno-tree-vectorize -D_FORTIFY_SOURCE=2 -fsigned-char -DNDEBUG -O3 -D__SSE__ -D__SSE2__ -MD -MT tutorials/quaternion_motion_blur/CMakeFiles/embree_quaternion_motion_blur.dir/quaternion_motion_blur.cpp.o -MF CMakeFiles/embree_quaternion_motion_blur.dir/quaternion_motion_blur.cpp.o.d -o CMakeFiles/embree_quaternion_motion_blur.dir/quaternion_motion_blur.cpp.o -c /builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/quaternion_motion_blur/quaternion_motion_blur.cpp *** WARNING *** there are active plugins, do not report this as a bug unless you can reproduce it without enabling any plugins. Event | Plugins PLUGIN_FINISH_UNIT | annobin: Generate final annotations PLUGIN_START_UNIT | annobin: Generate global annotations PLUGIN_ALL_PASSES_START | annobin: Generate per-function annotations PLUGIN_ALL_PASSES_END | annobin: Register per-function end symbols during RTL pass: ldp_fusion /builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/bvh_access/bvh_access.cpp: In function ‘embree::print_bvh4_triangle4v(embree::NodeRefPtr<4>, unsigned long) [clone .constprop.3]’: /builddir/build/BUILD/embree-4.3.3-build/embree-4.3.3/tutorials/bvh_access/bvh_access.cpp:176:3: internal compiler error: Segmentation fault 176 | } | ^ Please submit a full bug report, with preprocessed source. See <http://bugzilla.redhat.com/bugzilla> for instructions. This was the root cause of bug 2340123, but I am about to open a PR that will propose working around the FTBFS by not building the tutorials. Since merging that PR would close bug 2340123, I am opening this issue to track the actual GCC bug. Reproducible: Always