[patch, libgfortran] Some more transformational intrinsic speedups

[FX Coudert]

> This is looking very good.  This is OK after regression-testing.


I wrote that in an airport and have no possibility to regtest  
currently. Please feel free to incorporate to your patch and regtest,  
otherwise I'll get to it when I get some time (maybe this week-end).

FX

-- 
François-Xavier Coudert
http://www.homepages.ucl.ac.uk/~uccafco/