On Wed, Aug 15, 2018 at 07:55:18AM -0500, Tamar Christina wrote: > Hi All, > > I'm updating the patch with the suggested changes and also fixing a bug with > a boundary condition. > > On AArch64 we have integer modes larger than TImode, and while we can generate > moves for these they're not as efficient. > > So instead make sure we limit the maximum we can copy to TImode. This means > copying a 16 byte struct will issue 1 TImode copy, which will be done using a > single STP as we expect but an CImode sized copy won't issue CImode > operations. > > I am also moving the residual code inside the if since smallest_mode_for_int > may > trap if the mode doesn't exist. And the only time we know the mode to exist > for > sure is when the condition of the if is true. This also saves repeated calls > to > the iterator. > > Bootstrapped and regtested on aarch4-none-linux-gnu and no issues. > Crosstested aarch4_be-none-elf and no issues. > > Ok for trunk?
OK. Thanks, James > gcc/ > 2018-08-15 Tamar Christina <tamar.christ...@arm.com> > > * config/aarch64/aarch64.c (aarch64_expand_movmem): Set TImode max. > > gcc/testsuite/ > 2018-08-15 Tamar Christina <tamar.christ...@arm.com> > > * gcc.target/aarch64/large_struct_copy_2.c: New. >
