[Bug target/110796] builtin_iseqsig fails some tests in armv8l-linux-gnueabihf

["thiago.bauermann at linaro dot org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110796

--- Comment #4 from Thiago Jung Bauermann <thiago.bauermann at linaro dot org> ---
Thanks for looking into this.

(In reply to Francois-Xavier Coudert from comment #3)
> Do the failure only occur at -Os?

Only at -Os. The FAILs I mentioned in the bug report are the only ones that
occur.

> Does it pass at -O0, -O1, -O2?

Yes.

> And could you possibly run builtin-iseqsig-1.c under gdb and obtain a
> backtrace?

Here it is:

thiago.bauermann@tcwg-jade-03-dev:~/tmp$
/home/thiago.bauermann/.cache/builds/gcc-native-aarch32/gcc/xgcc
-B/home/thiago.bauermann/.cache/builds/gcc-native-aarch32/gcc/
/home/thiago.bauermann/src/gcc/gcc/testsuite/gcc.dg/torture/builtin-iseqsig-1.c
   -fdiagnostics-plain-output    -Os  -fsignaling-nans -ggdb3  -lm  -o
./builtin-iseqsig-1.exe
thiago.bauermann@tcwg-jade-03-dev:~/tmp$ gdb builtin-iseqsig-1.exe
Reading symbols from builtin-iseqsig-1.exe...
(gdb) r
Starting program: /home/thiago.bauermann/tmp/builtin-iseqsig-1.exe
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".

Program received signal SIGABRT, Aborted.
__libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:47
47      ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S: No such file or
directory.
(gdb) bt
#0  __libc_do_syscall () at ../sysdeps/unix/sysv/linux/arm/libc-do-syscall.S:47
#1  0xf7e8d2ca in __pthread_kill_implementation (threadid=4160625664,
signo=signo@entry=6,
    no_tid=no_tid@entry=0) at pthread_kill.c:43
#2  0xf7e8d30c in __pthread_kill_internal (signo=6, threadid=<optimized out>)
at pthread_kill.c:78
#3  0xf7e5c840 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#4  0xf7e4d5e4 in __GI_abort () at abort.c:79
#5  0x00010426 in main ()
    at
/home/thiago.bauermann/src/gcc/gcc/testsuite/gcc.dg/torture/builtin-iseqsig-1.c:30
(gdb) frame 5
#5  0x00010426 in main ()
    at
/home/thiago.bauermann/src/gcc/gcc/testsuite/gcc.dg/torture/builtin-iseqsig-1.c:30
30        if (fetestexcept (FE_INVALID)) __builtin_abort ();
(gdb)