On Saturday 10 February 2007 01:41, ls-ocaml-developer-2006@m-e-leypold.de 
wrote:
> Sorry, I wanted to say "optimize (a * b) *c == a * (b * c) to true",
> i.e. 1. Would the compiler be wrong/incorrect in doing so?

Yes.

> I don't think so.

Provided you only specify -O* optimisation flags, I believe that reducing that 
expression to "true" in the general case would be a compiler bug. If you 
specify flags like -ffast-math then anything can happen, but it will happen 
very quickly! ;-)

-- 
Dr Jon D Harrop, Flying Frog Consultancy Ltd.
OCaml for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists