On 04-Jun-15 03:54 AM, Jim Wilson wrote:
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
Thanks, this is what I was looking for. From the comments, he didn't
intend to do what I saw. Probably, the problem is in my port and the
very special way that we handle instruction costs.
If I see a problem that isn't specific to my port, I will report back.
Shmeel
