https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110601
Bug ID: 110601
Summary: [14 Regression] ICE on systemd-253.5: during GIMPLE
pass: cunroll: internal compiler error: Segmentation
fault in scale_loop_profile()
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Noticed ICE on gcc-master r14-2396-g15bbf1826a01f5 when building systemd-253.5
cvise came up with this test:
// $ cat bug.c
int high_key_blocks[] = {0, 0};
int high_key_blocks_0_0;
long test_key_bitmask_key;
void log_object_internal();
void test_key() {
_Bool found = 0;
for (long i;;)
for (long block = 0;
block < sizeof(high_key_blocks) / sizeof(int) && !found; block++)
for (i = high_key_blocks_0_0; i && !found; i++)
if (test_key_bitmask_key) {
log_object_internal();
found = 1;
}
}
Crashing:
$ gcc -c bug.c -o bug.o -O2 -Werror -Wall
during GIMPLE pass: cunroll
bug.c: In function 'test_key':
bug.c:5:6: internal compiler error: Segmentation fault
5 | void test_key() {
| ^~~~~~~~
0xccc87f crash_signal
../../source/gcc/toplev.cc:314
0x85aafe fprintf
/nix/store/2bhnayqiskhnif3nhs26kkai342dz4dz-glibc-2.37-8-dev/include/bits/stdio2.h:79
0x85aafe scale_loop_profile(loop*, profile_probability, long)
../../source/gcc/cfgloopmanip.cc:585
0xdfa332 try_unroll_loop_completely
../../source/gcc/tree-ssa-loop-ivcanon.cc:911
0xdfa332 canonicalize_loop_induction_variables
../../source/gcc/tree-ssa-loop-ivcanon.cc:1286
0xdfb667 tree_unroll_loops_completely_1
../../source/gcc/tree-ssa-loop-ivcanon.cc:1429
0xdfb5be tree_unroll_loops_completely_1
../../source/gcc/tree-ssa-loop-ivcanon.cc:1382
0xdfb5be tree_unroll_loops_completely_1
../../source/gcc/tree-ssa-loop-ivcanon.cc:1382
0xdfb83b tree_unroll_loops_completely
../../source/gcc/tree-ssa-loop-ivcanon.cc:1478
0xdfbc3f execute
../../source/gcc/tree-ssa-loop-ivcanon.cc:1644
0xdfbc3f execute
../../source/gcc/tree-ssa-loop-ivcanon.cc:1634
$ gcc -v
Using built-in specs.
COLLECT_GCC=/<<NIX>>/gcc-14.0.0/bin/gcc
COLLECT_LTO_WRAPPER=/<<NIX>>/gcc-14.0.0/libexec/gcc/x86_64-unknown-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../source/configure --prefix=/<<NIX>>/gcc-14.0.0
--with-gmp-include=/<<NIX>>/gmp-6.2.1-dev/include
--with-gmp-lib=/<<NIX>>/gmp-6.2.1/lib
--with-mpfr-include=/<<NIX>>/mpfr-4.2.0-dev/include
--with-mpfr-lib=/<<NIX>>/mpfr-4.2.0/lib --with-mpc=/<<NIX>>/libmpc-1.3.1
--with-native-system-header-dir=/<<NIX>>/glibc-2.37-8-dev/include
--with-build-sysroot=/ --program-prefix= --enable-lto --disable-libstdcxx-pch
--without-included-gettext --with-system-zlib --enable-checking=release
--enable-static --enable-languages=c,c++ --disable-multilib --enable-plugin
--disable-libcc1 --with-isl=/<<NIX>>/isl-0.20 --disable-bootstrap
--build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
--target=x86_64-unknown-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 99999999 (experimental) (GCC)
