https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121725
--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
Here's another testcase from elfutils. It has two files, I haven't tried to
condense it into one to keep it more realistic, but I can if needed.
```
$ cat dwarf_error.i
static __thread int global_error;
int
dwarf_errno ()
{
return global_error;
}
__typeof__ (dwarf_errno) __dwarf_errno_internal
__attribute__ ((alias ("dwarf_errno")));
void
__libdw_seterrno ()
{
global_error = 0;
}
```
```
$ cat dwarf_getsrc_file.i
int dwarf_getsrc_file_dbg, dwarf_getsrc_file_cudie;
long dwarf_getsrc_file_cuhl, dwarf_getsrc_file_noff, dwarf_getsrc_file_nlines;
int *dwarf_getsrc_file_lines;
char dwarf_getsrc_file_fname2;
int dwarf_nextcu (int *, long, long *, long *, long, char, char);
int dwarf_getsrclines (int *, int **, long *);
void xbasename (char *);
void __libdw_seterrno ();
int __dwarf_errno_internal ();
int
dwarf_getsrc_file (char *fname)
{
bool is_basename = __builtin_strchr (fname, '/');
for (; dwarf_nextcu (&dwarf_getsrc_file_dbg, 0, &dwarf_getsrc_file_noff,
&dwarf_getsrc_file_cuhl, 0, 0, 0);)
{
if (dwarf_getsrclines (&dwarf_getsrc_file_cudie,
&dwarf_getsrc_file_lines,
&dwarf_getsrc_file_nlines))
{
int error = __dwarf_errno_internal ();
if (error == 0)
continue;
__libdw_seterrno ();
return 1;
}
if (is_basename)
xbasename (&dwarf_getsrc_file_fname2);
}
}
```
```
$ gcc -O3 -flto dwarf_error.i dwarf_getsrc_file.i -shared
-fno-semantic-interposition -fPIC
during RTL pass: x86_cse
dwarf_getsrc_file.i: In function ‘dwarf_getsrc_file’:
dwarf_getsrc_file.i:32:1: internal compiler error: in candidate_gnu2_tls_p, at
config/i386/i386-features.cc:4300
32 | }
| ^
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://bugs.gentoo.org/> for instructions.
lto-wrapper: fatal error: gcc returned 1 exit status
compilation terminated.
/usr/lib/gcc/x86_64-pc-linux-gnu/16/../../../../x86_64-pc-linux-gnu/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status
```
