[m68k] register renaming not properly tracking used registers

[Richard Henderson]

On Wed, Oct 20, 2004 at 08:43:18PM -0400, Peter Barada wrote:
> 	* config/m68k/m68k.h (HARD_REGNO_RENAME_OK): New macro.
> 	* config/m68k/m68k.c (m68k_hard regno_rename_ok): Disallow
> 	  renaming of non-live registers in interrupt functions.
> 	* config/m68k/m68k-protos.h (m68k_hard_regno_rename_ok): Add prototype.

Ok.

> + {
> + 
> + /* Interrupt functions can only use registers that have already been
> +    saved by the prologue, even if they would normally be
> +    call-clobbered.  */
> + 
> +   if (m68k_interrupt_function_p(current_function_decl)
> +       && !regs_ever_live[new_reg])
> +      return 0;
> + 
> +    return 1;
> + }

Watch the formatting.


r~