egcs-2.93.19 19990420, new sparc testsuite failures w/nested funcs

[John Wehle]

>The new failures look like this:
>
> > % gcc -O execute/nestfunc-1.c
> > execute/nestfunc-1.c: In function `f':
> > execute/nestfunc-1.c:22: Internal compiler error in
> > 	`leaf_renumber_regs_insn', at final.c:4096
> > Please submit a full bug report to `egcs-bugs@egcs.cygnus.com'.
> > See <URL: http://egcs.cygnus.com/faq.html#bugreport > for details.
>
>	Could it be related to the following recent changes?

Yep.  It looks like current_function_uses_only_leaf_regs isn't always
being cleared.  Please try the enclosed patch.

*** toplev.c.ORIGINAL	Sat Apr 17 19:09:02 1999
--- toplev.c	Wed Apr 21 17:56:43 1999
*************** rest_of_compilation (decl)
*** 4240,4247 ****
      }
  
  #ifdef LEAF_REGISTERS
!   if (optimize > 0 && only_leaf_regs_used () && leaf_function_p ())
!     current_function_uses_only_leaf_regs = 1;
  #endif
  
    /* One more attempt to remove jumps to .+1
--- 4240,4247 ----
      }
  
  #ifdef LEAF_REGISTERS
!   current_function_uses_only_leaf_regs
!     = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
  #endif
  
    /* One more attempt to remove jumps to .+1
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