https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86877
--- Comment #2 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- Author: rsandifo Date: Thu Sep 20 12:58:16 2018 New Revision: 264439 URL: https://gcc.gnu.org/viewcvs?rev=264439&root=gcc&view=rev Log: Add missing alignment checks in epilogue loop vectorisation (PR 86877) Epilogue loop vectorisation skips vect_enhance_data_refs_alignment since it doesn't make sense to version or peel the epilogue loop (that will already have happened for the main loop). But this means that it also fails to check whether the accesses are suitably aligned for the new vector subarch. We don't seem to carry alignment information from the (potentially peeled or versioned) main loop to the epilogue loop, which would be good to fix at some point. I think we want this patch regardless, since there's no guarantee that the alignment requirements are the same for every subarch. 2018-09-20 Richard Sandiford <richard.sandif...@arm.com> gcc/ PR tree-optimization/86877 * tree-vect-loop.c (vect_analyze_loop_2): Call vect_verify_datarefs_alignment. gcc/testsuite/ PR tree-optimization/86877 * gfortran.dg/vect/vect-8-epilogue.F90: New test. Added: trunk/gcc/testsuite/gfortran.dg/vect/vect-8-epilogue.F90 Modified: trunk/gcc/ChangeLog trunk/gcc/testsuite/ChangeLog trunk/gcc/tree-vect-loop.c
