* Question on load motion in GCSE
@ 2012-10-30 13:47 Bin.Cheng
2012-10-30 15:55 ` Bin.Cheng
0 siblings, 1 reply; 2+ messages in thread
From: Bin.Cheng @ 2012-10-30 13:47 UTC (permalink / raw)
To: gcc
Hi,
When doing load motion in GCSE, it depends on different simple memory
refers in pre_ldst_table won't clobber(alias to) each other.
I am assuming function simple_mem is the answer to this question, but
what I don't understand is how simple_mem can make sure of this?
Did I understand the load motion in a wrong way? Please help. Thanks.
--
Best Regards.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Question on load motion in GCSE
2012-10-30 13:47 Question on load motion in GCSE Bin.Cheng
@ 2012-10-30 15:55 ` Bin.Cheng
0 siblings, 0 replies; 2+ messages in thread
From: Bin.Cheng @ 2012-10-30 15:55 UTC (permalink / raw)
To: gcc
On Tue, Oct 30, 2012 at 9:47 PM, Bin.Cheng <amker.cheng@gmail.com> wrote:
> Hi,
> When doing load motion in GCSE, it depends on different simple memory
> refers in pre_ldst_table won't clobber(alias to) each other.
> I am assuming function simple_mem is the answer to this question, but
> what I don't understand is how simple_mem can make sure of this?
>
> Did I understand the load motion in a wrong way? Please help. Thanks.
>
Please ignore this message. I just realized that GCC retreats to
normal alias information in mems_conflict_for_gcse_p function for
different memory refs in pre_ldst_table.
--
Best Regards.
^ permalink raw reply [flat|nested] 2+ messages in thread
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