[Bug lto/86344] New: GCC 8.1 ICEd at LTO stage
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86344 Bug ID: 86344 Summary: GCC 8.1 ICEd at LTO stage Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: lto Assignee: unassigned at gcc dot gnu.org Reporter: oddin at mimecast dot com CC: marxin at gcc dot gnu.org Target Milestone: --- I have a fairly large C++ project that I build with LTO (including dependencies that are packaged up in LTO form) which successfully LTOs on GCC6 and Clang6. However, I get this error when trying it with GCC8.1: lto1: internal compiler error: in add_symbol_to_partition_1, at lto/lto-partition.c:203 0x5658ca add_symbol_to_partition_1 ../.././gcc/lto/lto-partition.c:203 0x5c977b add_references_to_partition ../.././gcc/lto/lto-partition.c:93 0x5c99fd add_symbol_to_partition_1 ../.././gcc/lto/lto-partition.c:176 0x5c9b15 add_symbol_to_partition_1 ../.././gcc/lto/lto-partition.c:161 0x5c9b15 add_symbol_to_partition_1 ../.././gcc/lto/lto-partition.c:161 0x5cb942 lto_balanced_map(int, int) ../.././gcc/lto/lto-partition.c:551 0x5c2429 do_whole_program_analysis ../.././gcc/lto/lto.c:3218 0x5c2429 lto_main() ../.././gcc/lto/lto.c:3413 Unfortunately I've not yet been able to create a minimal sample and am sadly not able to provide a dump of everything it's LTOing due to license constraints. output of gcc -v: Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-pc-linux-gnu/8.1.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: ./configure --enable-plugin --enable-lto --enable-gold --with-plugin-ld=gold --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --enable-linker-build-id --with-linker-hash-style=gnu --enable-libmpx Thread model: posix gcc version 8.1.0 (GCC) Compiler arguments passed at build-time are -O3 -flto -fuse-ld=gold (same crash is produced if I omit the gold linker)
[Bug lto/86344] GCC 8.1 ICEd at LTO stage
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86344 --- Comment #4 from Oliver Ddin --- So, I grabbed GCC8.1.1 from trunk and built it. Crash reoccured. However, I noticed that GCC wasn't doing LTO through the linker plugin, so after rebuilding with the correct configuration to enable -fuse-linker-plugin to work, I then rebuilt the project and this time, LTO succeeded without error. So, I suspect this is specifically a bug that manifests when doing LTO without using the linker plugin. I unfortunately don't have anything better for you at this point and since I now have a working build, I'll probably not get the time to find a minimal case that reproduces this in the non-linker-plugin scenario.
