[PATCH] Optimize unrolled reductions in LoopStrengthReduce

[Eric Christopher]

Cautious is fine, but adding more register pressure heuristics to the
middle end just gets us to a point where everything is poorly done via
heuristics.

-eric

On Tue Feb 10 2015 at 11:02:04 AM Quentin Colombet <qcolombet at apple.com>
wrote:

> > FWIW I'm not such a huge fan of using register pressure heuristics in
> the middle end
>
>
> FWIW, I agree, but this is not what LSR currently does and since the
> backends do not expect that yet, I would prefer moving with cautious.
>
> Q.
>
>
> http://reviews.llvm.org/D7128
>
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