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Re: [4.5] Find more autoinc addressing for induction variables
- From: Paolo Bonzini <bonzini at gnu dot org>
- To: Bernd Schmidt <bernds_cb1 at t-online dot de>
- Cc: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Date: Mon, 16 Feb 2009 17:17:48 +0100
- Subject: Re: [4.5] Find more autoinc addressing for induction variables
- References: <49998A2D.5000401@t-online.de>
> There'll be another patch to go with this one that makes
> tree-ssa-loop-ivopts.c generate more opportunities for this one to trigger.
That's nice, I recall seeing quite a few reports on this. Maybe we want
this only at -O2 though, DU/UD chains are relatively expensive to build
(see PR39157).
Paolo