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Re: Question about find modifiable mems
- From: Jim Wilson <jim dot wilson at linaro dot org>
- To: shmeel gutl <shmeelgutl at shmuelhome dot mine dot nu>, GCC Development <gcc at gcc dot gnu dot org>
- Date: Wed, 03 Jun 2015 17:54:29 -0700
- Subject: Re: Question about find modifiable mems
- Authentication-results: sourceware.org; auth=none
- References: <556EA138 dot 4050109 at shmuelhome dot mine dot nu>
On 06/02/2015 11:39 PM, shmeel gutl wrote:
> find_modifiable_mems was introduced to gcc 4.8 in september 2012. Is
> there any documentation as to how it is supposed to help the haifa
> scheduler?
The patch was submitted here
https://gcc.gnu.org/ml/gcc-patches/2012-08/msg00155.html
and this message contains a brief explanation of what it is supposed to
do. The explanation looks like a useful optimization, but perhaps it is
triggering in cases when it shouldn't.
Jim