On Sat, 31 Jan 2015, Jeff Law wrote: > The nice thing about wrapping the result inside a convert is the types for the > inner operations will propagate from the type of the inner operands, which is > exactly what we want. We then remove the hack assigning type and instead the > original type will be used for the outermost convert.
Those inner operands still need converting to unsigned for arithmetic. > And FWIW, there's no reason to restrict the pattern to just masking off the > sign bit. That's what the PR complains about, but we can do considerably > better here. That's part of the reason why I put in the iterators -- to > generalize this to more cases. Well, we want to move shorten_binary_op and shorten_compare to the new mechanism. -- Joseph S. Myers jos...@codesourcery.com
