[PATCH GCC][2/6]Compute available register for each register classes

[Bin.Cheng]

On Fri, May 4, 2018 at 5:21 PM, Bin Cheng <Bin.Cheng@arm.com> wrote:
> Hi,
> This is the second patch computing available/clobber registers for register classes.
> It's the same as the original patch posted @https://gcc.gnu.org/ml/gcc-patches/2017-05/msg01022.html
>
> Bootstrap and test on x86_64 and AArch64 ongoing.  Any comments?
Same as previous one.
The original version of this patch was approved by Jeff
@https://gcc.gnu.org/ml/gcc-patches/2017-06/msg01810.html
Jeff, any new comments or the approval is valid?

Thanks,
bin

>
> Thanks,
> bin
> 2017-04-27  Bin Cheng  <bin.cheng@arm.com>
>
>         * cfgloop.h (struct target_cfgloop): Change x_target_avail_regs and
>         x_target_clobbered_regs into array fields.
>         (init_avail_clobber_regs): New declaration.
>         * cfgloopanal.c (memmodel.h, ira.h): Include header files.
>         (init_set_costs): Remove computation for old x_target_avail_regs and
>         x_target_clobbered_regs fields.
>         (init_avail_clobber_regs): New function.
>         (estimate_reg_pressure_cost): Update the uses.
>         * toplev.c (cfgloop.h): Update comment why the header file is needed.
>         (backend_init_target): Call init_avail_clobber_regs.
>         * tree-predcom.c (memmodel.h, ira.h): Include header files.
>         (MAX_DISTANCE): Update the use.
>         * tree-ssa-loop-ivopts.c (AVAILABLE_REGS, CLOBBERED_REGS): New marco.
>         (ivopts_estimate_reg_pressure, determine_set_costs): Update the uses.