On 11/03/2017 10:19 AM, Richard Sandiford wrote: > SLP load permutation fails if any individual permutation requires more > than two vector inputs. For 128-bit vectors, it's possible to permute > 3 contiguous loads of 32-bit and 8-bit elements, but not 16-bit elements > or 64-bit elements. The results are reversed for 256-bit vectors, > and so on for wider vectors. > > This patch adds a routine that tests whether a permute will require > three vectors for a given vector count and element size, then adds > vect_perm3_* target selectors for the cases that we currently use. > > > 2017-11-03 Richard Sandiford <richard.sandif...@linaro.org> > Alan Hayward <alan.hayw...@arm.com> > David Sherwood <david.sherw...@arm.com> > > gcc/ > * doc/sourcebuild.texi (vect_perm_short, vect_perm_byte): Document > previously undocumented selectors. > (vect_perm3_byte, vect_perm3_short, vect_perm3_int): Document. > > gcc/testsuite/ > * lib/target-supports.exp (vect_perm_supported): New proc. > (check_effective_target_vect_perm3_int): Likewise. > (check_effective_target_vect_perm3_short): Likewise. > (check_effective_target_vect_perm3_byte): Likewise. > * gcc.dg/vect/slp-perm-1.c: Expect SLP load permutation to > succeed if vect_perm3_int. > * gcc.dg/vect/slp-perm-5.c: Likewise. > * gcc.dg/vect/slp-perm-6.c: Likewise. > * gcc.dg/vect/slp-perm-7.c: Likewise. > * gcc.dg/vect/slp-perm-8.c: Likewise vect_perm3_byte. > * gcc.dg/vect/slp-perm-9.c: Likewise vect_perm3_short. > Use vect_perm_short instead of vect_perm. Add a scan-tree-dump-not > test for vect_perm3_short targets. Going to take your word on the correctness of vect_perm_supported. :-)
OK for the trunk. jeff
