[Bug target/79439] Missing nop instruction after recursive call corrupts TOC register

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79439

Segher Boessenkool <segher at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2017-02-09
     Ever confirmed|0                           |1

--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> ---
We have (in rs6000/predicates.md):

;; Return 1 if the operand is a SYMBOL_REF for a function known to be in
;; this file.
(define_predicate "current_file_function_operand"
  (and (match_code "symbol_ref")
       (match_test "(DEFAULT_ABI != ABI_AIX || SYMBOL_REF_FUNCTION_P (op))
                    && (SYMBOL_REF_LOCAL_P (op)
                        || op == XEXP (DECL_RTL (current_function_decl), 0))
                    && !((DEFAULT_ABI == ABI_AIX
                          || DEFAULT_ABI == ABI_ELFv2)
                         && (SYMBOL_REF_EXTERNAL_P (op)
                             || SYMBOL_REF_WEAK (op)))")))

so this seems to be on purpose.