On Sat, Oct 15, 2011 at 11:27 PM, Andrew Stubbs <a...@codesourcery.com> wrote: > This patch fixes a bug in which the widening multiply-and-accumulate > optimization failed to take the intermediate types into account. > > The effect of this is that the compiler would do what the programmer > expected to happen, rather than what the C standard requires to happen (in > many cases), so obviously this needed fixing. :) > > It still needs to optimize the cases where the optimization doesn't actually > change anything (because it's known that overflow cannot occur), so I don't > want to completely disallow extends between multiply and plus, and I believe > this patch achieves this. > > OK?
Ok. THanks, Richard. > Andrew >
