[Bug lto/66228] Compiling simple program with -flto -O1 causes mad behaviour

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66228

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-05-21
                 CC|                            |hubicka at gcc dot gnu.org
     Ever confirmed|0                           |1
      Known to fail|                            |4.8.4, 4.9.2

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think this is an effective duplicate of PR61886.  With GCC 5 I get

rguenther@murzim:/tmp> gcc-5 t.i -O -flto 
/usr/include/bits/error.h: In function âerrorâ:
/usr/include/bits/error.h:37:1: error: inlining failed in call to always_inline
âerrorâ: recursive inlining
 error (int __status, int __errnum, const char *__format, ...)
 ^
/usr/include/bits/error.h:40:5: error: called from here
     __error_noreturn (__status, __errnum, __format, __va_arg_pack ());
     ^
/usr/include/bits/error.h:37:1: error: inlining failed in call to always_inline
âerrorâ: recursive inlining
 error (int __status, int __errnum, const char *__format, ...)
 ^
/usr/include/bits/error.h:40:5: error: called from here
     __error_noreturn (__status, __errnum, __format, __va_arg_pack ());
     ^
...

I can reproduce the odd code generation with GCC 4.9 and 4.8.  I suspect
the issue is related to the above.