This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: PATCH: Very simple constant propagation (revisited)


On Tue, Mar 02, 2004 at 04:01:56PM -0800, Caroline Tice wrote:
> This patch is to address an efficiency problem in gcc.  If you compile 
> the following small loop with -O3 -ffast-math, the optimizer converts
> the "a/b"  into "a * 1/b", in the hopes of being able to do some further
> optimizations.  In this case it can't so ideally  the combiner should 
> convert "a * 1/b"  back into "a/b".

At this point, I'd really prefer to solve this problem at the 
tree-ssa level.


r~


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]