https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123777
Bug ID: 123777
Summary: [15 Regression] ICE in lto_get_decl_name_mapping
during IPA-ICF pass with LTO (aarch64)
Product: gcc
Version: 15.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: unassigned at gcc dot gnu.org
Reporter: return.of.octobot at gmail dot com
Target Milestone: ---
GCC 15.1.0 crashes with an ICE during the IPA-ICF pass when building the Linux
kernel with LTO for aarch64. The same build succeeds with GCC 14.2.0.
Workaround: -fno-ipa-icf allows the build to proceed.
Target: aarch64-linux-gnu
Host: x86_64-pc-linux-gnu (cross-compile)
LTO flags: -flto=jobserver -fipa-pta -fno-fat-lto-objects -fuse-linker-plugin
-fwhole-program
The crash occurs during the final link of vmlinux.o:
LD vmlinux.o
during IPA pass: icf
lto1: internal compiler error: Segmentation fault
0x1fc85c8 diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag
(*) [1], diagnostic_t)
???:0
0x1fda171 internal_error(char const*, ...)
???:0
0xbd68fd lto_get_decl_name_mapping(lto_file_decl_data*, char const*)
???:0
0x8722ad cgraph_node::get_untransformed_body()
???:0
0x1e1d8ac ipa_icf::sem_function::init(ipa_icf_gimple::func_checker*)
???:0
0x1e20705 ipa_icf::sem_item_optimizer::parse_nonsingleton_classes()
???:0
0x1e29a40 ipa_icf::sem_item_optimizer::execute()
???:0
0x1e2b09c ipa_icf::pass_ipa_icf::execute(function*)
???:0
Kernel: Linux 6.1.159 (android14-6.1)
I don't have a minimal preprocessed reproducer since this is an LTO link-time
crash, but happy to provide more info or test patches.
$ aarch64-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=aarch64-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/15.1.0/lto-wrapper
Target: aarch64-linux-gnu
Configured with: /build/aarch64-linux-gnu-gcc/src/gcc-15.1.0/configure
--prefix=/usr --program-prefix=aarch64-linux-gnu-
--with-local-prefix=/usr/aarch64-linux-gnu
--with-sysroot=/usr/aarch64-linux-gnu
--with-build-sysroot=/usr/aarch64-linux-gnu
--with-native-system-header-dir=/include --libdir=/usr/lib
--libexecdir=/usr/lib --target=aarch64-linux-gnu --host=x86_64-pc-linux-gnu
--build=x86_64-pc-linux-gnu --disable-nls --enable-default-pie
--enable-languages=c,c++,fortran --enable-shared --enable-threads=posix
--with-system-zlib --with-isl --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch
--disable-libssp --enable-gnu-unique-object --enable-linker-build-id
--enable-lto --enable-plugin --enable-install-libiberty
--with-linker-hash-style=gnu --enable-gnu-indirect-function --disable-multilib
--disable-werror --enable-checking=release
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 15.1.0 (GCC)
