[Bug lto/60721] xcoral fails to build with LTO: internal compiler error: verify_flow_info failed

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

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60721

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
(gdb) p debug_bb (bb)
<bb 2>:
result_5 = getenv ("SMAC_STACK_SIZE");
if (result_5 != 0B)
  goto <bb 3>;
else
  goto <bb 5>;
(gdb) p debug_generic_expr (cfun->decl)
init_smac

in one unit getenv is pulled in via a header leading to

extern char *getenv (const char *__name) __attribute__ ((__nothrow__ ,
__leaf__)) __attribute__ ((__nonnull__ (1))) __attribute__
((__warn_unused_result__));

(note the leaf attribute), and in the other we have

int
main ( argc, argv )
    int argc;
    char **argv;
{
...
  extern char *getenv ();

this means that if cfun->calls_setjmp as in this case, this can make a
difference.  This is verifying after IPA transforms took place.

It seems that 'leaf' is a decl attribute and thus is not preserved
via gimple_call_fntype streaming (and also cannot be set for indirect calls).

Sth for stmt fixup similar as we handle noreturn?