On 02/12/2017 00:47, Segher Boessenkool wrote: > On Thu, Nov 30, 2017 at 06:43:09PM -0700, Jeff Law wrote: > >> On 11/29/2017 03:22 AM, Marc Glisse wrote: >> >>> the extra &15 comes from extending from unsigned char to long >>> I don't know how easy/hard it is to improve, but I am sure it >>> is more likely to happen if you file an issue in bugzilla ;-) >> >> Certainly more likely to get addressed if a bug is filed ;-) >> >> This is actually an RTL issue AFAICT. So it's going to be tougher to >> fix -- lack of range information and the dataflow is going to make it >> tough for the combiner to do anything. > > Power has this same problem all over the place. I'm looking to improve > it but it is not a simple problem. GCC 9, perhaps. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83272 Regards.
