A prototype loop reverser for the scalarizer

[Toon Moene]

Toon Moene wrote:

> Hmmm, good idea, that -fassociative-math - why didn't I come up with 
> that myself ;-)
> 
> [ I suppose it means: treat (A+B)+C as the same as A+(B+C) ]

I realize this needs a correction:

In Fortran

	A + B + C

means the processor (compiler, run time library, OS) can evaluate this 
expression as either:

	(A + B) + C

or

	A + (B + C)

or

	(A + C) + B

[Because the programmer didn't specify an order by applying parentheses]

This is what -fassociative-math should establish:  It doesn't matter in 
which order you add the terms, we don't care.

Cheers,

-- 
Toon Moene - e-mail: toon@moene.indiv.nluug.nl - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
A maintainer of GNU Fortran: http://gcc.gnu.org/fortran/
Who's working on GNU Fortran: 
http://gcc.gnu.org/ml/gcc/2006-01/msg00000.html