[PATCH] Fix ICE with delayed-branch targets after epilogue-unwind patch

[Richard Guenther]

On Sat, Jun 6, 2009 at 1:41 PM, Adam Nemet<anemet@caviumnetworks.com> wrote:
> This fixes the new ICEs in:
>
>  http://gcc.gnu.org/ml/gcc-testresults/2009-06/msg00327.html
>
> The gcc_assert in dwarf2out_begin_epilogue fires because returnjump_p fails to
> recognize a return inside a SEQUENCE.
>
> Bootstrapped and regtested on mips64octeon-linux.
>
> OK?

Ok.

Thanks,
Richard.

> Adam
>
>
>        * jump.c (returnjump_p): Handle delayed branches.  Add missing
>        function comment.
>
> Index: jump.c
> ===================================================================
> --- jump.c      (revision 148223)
> +++ jump.c      (working copy)
> @@ -886,11 +886,18 @@ returnjump_p_1 (rtx *loc, void *data ATT
>     }
>  }
>
> +/* Return TRUE if INSN is a return jump.  */
> +
>  int
>  returnjump_p (rtx insn)
>  {
> +  /* Handle delayed branches.  */
> +  if (NONJUMP_INSN_P (insn) && GET_CODE (PATTERN (insn)) == SEQUENCE)
> +    insn = XVECEXP (PATTERN (insn), 0, 0);
> +
>   if (!JUMP_P (insn))
>     return 0;
> +
>   return for_each_rtx (&PATTERN (insn), returnjump_p_1, NULL);
>  }
>
>