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Re: [RFC] Improving GCSE to reduce constant splits on ARM
- From: Paul Brook <paul at codesourcery dot com>
- To: gcc at gcc dot gnu dot org
- Cc: Dmitry Melnik <dm at ispras dot ru>, abel at ispras dot ru, dplotnikov at ispras dot ru
- Date: Sat, 25 Dec 2010 11:17:40 +0000
- Subject: Re: [RFC] Improving GCSE to reduce constant splits on ARM
- References: <4D1372A3.1090803@ispras.ru>
> 2) Is there any reason we shouldn't prevent GCSE from propagating
> constants that we know will be split?
IIUC this will increase register pressure. i.e. it will probably be a win for
simple loops, but risks catastrophic spills in the inner loop of more
complicated code.
Paul