"fix" alpha register allocation

Toon Moene toon@moene.indiv.nluug.nl
Thu Jan 15 20:11:00 GMT 2004


Richard Henderson wrote:

> I can imagine that this reordering might have the opposite effect
> for some specific numeric-heavy test cases, but for the nonce,

I wouldn't worry.  I've seen some horrible examples from our code - I 
just never got around asking why it did this.

Imagine you have a loop which needs quite a few array pointers 
(generated by strength reduction) and also quite a few floating point 
registers to hold intermediate values.  Because of the wrong ordering 
you'll see a lot of int->fp->int shuffling ...

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
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GNU Fortran 95: http://gcc.gnu.org/fortran/ (under construction)



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