On Sun, Jan 22, 2006 at 05:00:34PM +0100, Marcin Dalecki wrote:
> Inside gcc/target.h we have the declaration of
> struct gcc_target { struct asm_out { struct sched { ...
> there is a function refernce field named
>
> int (* branch_target_register_class) (void);
>
> The only place where this is referenced is in gcc/bt-load.c
> and in esp the global branch_target_load_optimize() function.
> Right away at the start. However there is no initialization of
> brnach_target_register_class at all anywhere.
> This of course will let the compiler crash on *every* call
> to branch_target_load_optimize().
If this were true, it would have been very easy to check: pass the
option, watch the compiler crash. Did you try it?
- It's not in struct sched, which is not in struct asm_out.
- If you'd loaded up the compiler in GDB you'd probably have
seen it initialized to hook_int_void_no_regs.
- This comes from TARGET_BRANCH_TARGET_REGISTER_CLASS.
- SH redefines that to sh_target_reg_class.
--
Daniel Jacobowitz
CodeSourcery
