Re: BOOTSTRAP FAILURE: segementation fault in genattrtab under hpux 10.20

[Richard Henderson <rth at redhat dot com>]

On Sun, Nov 12, 2000 at 02:49:29PM -0500, John David Anglin wrote:
> > > As can be seen, the return pointer rp has been used as a scratch register.
> > > Its value at the first return is 0.
> 
> I added a `(use (reg:SI 2))' to the return insn to work around this problem.

Hmm, it appears some general cleanup is needed in this area.
Try the following.

> Another problem with regrename?

Dunno.. does it work with -fno-rename-registers?


r~


	* config/pa/pa.md (return): Make a define_expand; use r2.
	(epilogue): Don't try trivial return.

Index: pa.md
===================================================================
RCS file: /cvs/gcc/egcs/gcc/config/pa/pa.md,v
retrieving revision 1.71
diff -c -p -d -r1.71 pa.md
*** pa.md	2000/10/17 04:43:58	1.71
--- pa.md	2000/11/13 23:07:16
***************
*** 5546,5565 ****
  
  ;; Unconditional and other jump instructions.
  
! (define_insn "return"
!   [(return)]
    "hppa_can_use_return_insn_p ()"
!   "*
! {
!   if (TARGET_PA_20)
!     return \"bve%* (%%r2)\";
!   return \"bv%* %%r0(%%r2)\";
! }"
!   [(set_attr "type" "branch")
!    (set_attr "length" "4")])
  
- ;; Use a different pattern for functions which have non-trivial
- ;; epilogues so as not to confuse jump and reorg.
  (define_insn "return_internal"
    [(return)
     (use (reg:SI 2))]
--- 5546,5557 ----
  
  ;; Unconditional and other jump instructions.
  
! (define_expand "return"
!   [(parallel [(return)
! 	      (use (reg:SI 2))])]
    "hppa_can_use_return_insn_p ()"
!   "")
  
  (define_insn "return_internal"
    [(return)
     (use (reg:SI 2))]
***************
*** 5576,5606 ****
  (define_expand "prologue"
    [(const_int 0)]
    ""
!   "hppa_expand_prologue ();DONE;")
  
  (define_expand "sibcall_epilogue"
    [(return)]
    ""
!   "
! {
!   hppa_expand_epilogue ();
!   DONE;
! }")
  
  (define_expand "epilogue"
    [(return)]
    ""
    "
  {
!   /* Try to use the trivial return first.  Else use the full
!      epilogue.  */
!   if (hppa_can_use_return_insn_p ())
!    emit_jump_insn (gen_return ());
!   else
!     {
!       hppa_expand_epilogue ();
!       emit_jump_insn (gen_return_internal ());
!     }
    DONE;
  }")
  
--- 5568,5587 ----
  (define_expand "prologue"
    [(const_int 0)]
    ""
!   "hppa_expand_prologue (); DONE;")
  
  (define_expand "sibcall_epilogue"
    [(return)]
    ""
!   "hppa_expand_epilogue (); DONE;")
  
  (define_expand "epilogue"
    [(return)]
    ""
    "
  {
!   hppa_expand_epilogue ();
!   emit_jump_insn (gen_return_internal ());
    DONE;
  }")