finding the induction variable after graphite (before ivcanon pass)?

[Basile Starynkevitch]

Hello

I am coding a pass in MELT which should ideally transform some OpenCL things
into Gimple (yes, I do know that this has been done by Andrey Belevantset et
al in their http://www.gccsummit.org/2010/view_abstract.php?content_key=15
paperat GCC Summit 2010).

That meltopengpu_detect pass is in the MELT branch file
gcc/melt/xtramelt-opengpu.melt

It is currently installed before the ivcanon pass.

How should I find the induction variable? I could loop at the internal name
of the variable, and check if it starts with graphite_IV. But is there a
better way?

(I want to code a MELT extension to gcc-4.6 thru the MELT plugin)

Regards.


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