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Re: [patch 2/2] PR27313 Transform conditional stores


On 5/15/07, Michael Matz <matz@suse.de> wrote:
Hmm, wait, you say that making conditional stores unconditional is bad,
but doing the same for conditional loads is good?  Wasn't the basis for
the former the fear for load-store hazards in one constructed example?  A
similar example can be constructed for the moved load.  So, what has
changed?

Two different parts of the Cell have different behaviors :). The SPU wants way less branches while the PowerPC part you have to take into account the load hit store hazzard.

Yes this they are different targets.  This is why GCC have to
becareful when implementing any kind of optimization, including this
one.

Thanks,
Andrew Pinski


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