[Bug c/39287] New: corrupted prologue generated

[Bug c/39287] New: corrupted prologue generated

[sb-sf at users dot sourceforge dot net]

int a(int *);

int b()
{
  int Tmp[2];
  d(Tmp);
}

produces bad prologue:
        .text
.global b
        .type   b, @function
b:
        push r29
        push r28
        rcall .
        rcall .
        rcall .
        in r28,__SP_L__
        in r29,__SP_H__
/* prologue: function */
/* frame size = 6 */
        movw r24,r28
        adiw r24,1
        rcall d
/* epilogue start */
        adiw r28,6
        in __tmp_reg__,__SREG__
        cli
        out __SP_H__,r29
        out __SREG__,__tmp_reg__
        out __SP_L__,r28
        pop r28
        pop r29
        ret
        .size   b, .-b


-- 
           Summary: corrupted prologue generated
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: sb-sf at users dot sourceforge dot net
GCC target triplet: avr


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39287

[Bug c/39287] corrupted prologue generated

[sb-sf at users dot sourceforge dot net]

------- Comment #1 from sb-sf at users dot sourceforge dot net  2009-02-24 10:16 -------
Created an attachment (id=17356)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17356&action=view)
file to reproduce bug

avr-gcc main.c -mmcu=atmega8 -S


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39287

[Bug target/39287] corrupted prologue generated

[eric dot weddington at atmel dot com]

-- 

eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal
          Component|c                           |target


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39287

[Bug target/39287] corrupted prologue generated

[eric dot weddington at atmel dot com]

------- Comment #2 from eric dot weddington at atmel dot com  2009-02-24 17:52 -------
What host are you building on?

With gcc 4.3.2 with patches from WinAVR I get this:

        .file   "test.c"
__SREG__ = 0x3f
__SP_H__ = 0x3e
__SP_L__ = 0x3d
__CCP__  = 0x34
__tmp_reg__ = 0
__zero_reg__ = 1
        .text
.global b
        .type   b, @function
b:
        push r29
        push r28
        rcall .
        rcall .
        in r28,__SP_L__
        in r29,__SP_H__
/* prologue: function */
/* frame size = 4 */
        movw r24,r28
        adiw r24,1
        rcall d
/* epilogue start */
        pop __tmp_reg__
        pop __tmp_reg__
        pop __tmp_reg__
        pop __tmp_reg__
        pop r28
        pop r29
        ret
        .size   b, .-b


-- 

eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39287

[Bug target/39287] corrupted prologue generated

[sb-sf at users dot sourceforge dot net]

------- Comment #3 from sb-sf at users dot sourceforge dot net  2009-02-24 20:56 -------
(In reply to comment #2)
> What host are you building on?
Windows, WinAVR 20081205.
Or... is "rcall ." the space allocating trick? If so, I'm wrong, and you can
close this bug report as invalid. I was expecting something like in-sbiw-out.
Sorry for distrubing.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39287

[Bug target/39287] corrupted prologue generated

[eric dot weddington at atmel dot com]

------- Comment #4 from eric dot weddington at atmel dot com  2009-02-25 01:29 -------
(In reply to comment #3)
> (In reply to comment #2)
> > What host are you building on?
> Windows, WinAVR 20081205.
> Or... is "rcall ." the space allocating trick?

Yes it is.

Closing as invalid.


-- 

eric dot weddington at atmel dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39287