Re: [PATCH GCC]Improve rtl loop inv cost by checking if the inv can be propagated to address uses

Mon, 28 Sep 2015 04:28:59 -0700 

On 09/28/2015 11:43 AM, Bin Cheng wrote:

Bootstrap and test on x86_64 and x86_32.  Will test it on aarch64.  So any
comments?

Thanks,
bin

2015-09-28  Bin Cheng  <bin.ch...@arm.com>

        * loop-invariant.c (struct def): New field cant_fwprop_to_addr_uses.
        (inv_cant_fwprop_to_addr_use): New function.
        (record_use): Call inv_cant_fwprop_to_addr_use, set the new field.
        (get_inv_cost): Count cost if inv can't be propagated into its
        address uses.
It looks at least plausible. Another option which I think has had some discussion recently would be to just move everything, and leave it to cprop to put things back together if the costs allow it. 


Bernd

Reply via email to