From mboxrd@z Thu Jan  1 00:00:00 1970
From: dewar@gnat.com
To: dewar@gnat.com, torvalds@transmeta.com
Cc: gcc@gcc.gnu.org, moshier@moshier.ne.mediaone.net, tprince@computer.org
Subject: Re: What is acceptable for -ffast-math? (Was: associative law in combine)
Date: Mon, 30 Jul 2001 06:00:00 -0000
Message-id: <20010730130002.D7FEEF2B53@nile.gnat.com>
X-SW-Source: 2001-07/msg01925.html

<<It's sad that C99 doesn't seem to allow the Fortran kind of "you go and
make the best you can of this expression unless I tell you otherwise".
>>

But if you look at real Fortran codes, they are full of parentheses to stop
the compiler from messing around, and in fact most Fortran compilers do only
very limited mucking even when no parens are present. I would be shocked
to find a FOrtraqn compiler that changed

a*c + b*c

into

(a+b)*c

a totally diffrerent expression!

I would have written the second expression if I had wanted that effect.