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Re: [PATCH RFC]Pair load store instructions using a generic scheduling fusion pass


On Oct 6, 2014, at 4:32 AM, Richard Biener <richard.guenther@gmail.com> wrote:
> On Mon, Oct 6, 2014 at 11:57 AM, Bin.Cheng <amker.cheng@gmail.com> wrote:
> 
> How many merging opportunities does sched2 undo again?  ISTR it
> has the tendency of pushing stores down and loads up.

So, the pass works by merging 2 or more loads into 1 load (at least on my port).  sched2 would need to rip apart 1 load into 2 loads to be able to undo the real work.  The non-real work, doesn’t matter any.  Can sched2 rip apart a single load?

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