https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122012
Bug ID: 122012
Summary: Internal compiler error in check_for_plus_in_loops on
aarch64 with -Os
Product: gcc
Version: 15.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: j.ne at posteo dot net
Target Milestone: ---
The following C program causes an internal compiler error in GCC 15.2.0 and
16.0.0 20250919, when compiling for aarch64 with -Os:
// -------------------------------------- //
void bar();
extern inline int foo(char * s) {
if (__builtin_object_size(s, 2))
bar();
}
void loop() {
int n;
while (1) {
char *t;
t += foo(t);
if (n)
continue;
}
}
// -------------------------------------- //
$ gcc --version
gcc (Alpine 15.2.0) 15.2.0
Copyright (C) 2025 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ gcc -Os -freport-bug file.c
during GIMPLE pass: objsz
file.c: In function 'loop':
file.c:7:6: internal compiler error: in check_for_plus_in_loops, at
tree-object-size.cc:2158
7 | void loop() {
| ^~~~
0xffff7be7e6cf libc_start_main_stage2
src/env/__libc_start_main.c:95
Please submit a full bug report, with preprocessed source.
Please include the complete backtrace with any bug report.
See <https://gitlab.alpinelinux.org/alpine/aports/-/issues> for instructions.
Preprocessed source stored into /tmp/cccaABhC.out file, please attach this to
your bugreport.
