On Thu, 4 Jun 2009, Adam Nemet wrote: > 1. Change STRIP_NOPS not to remove the cast if it's changing the precision > (not just when it changes machine modes). And then audit code quality where > we need to and are allowed to look through these casts.
As I said in <http://gcc.gnu.org/ml/gcc-bugs/2007-03/msg02228.html> and <http://gcc.gnu.org/ml/gcc/2008-01/msg00215.html>, I think such references to the mode are as a proxy for precision and machine modes are an inappropriate level of abstraction for the tree optimizers. So I favour checking for precision here - but I also favour having a good look at anything using STRIP_NOPS etc. and considering whether it should use some better defined function for removing redundant conversions instead. -- Joseph S. Myers jos...@codesourcery.com
