[Bug tree-optimization/66917] [4.9/5/6 regression] ARM: NEON: memcpy compiles to vst1 with incorrect alignment due to SRA

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66917

--- Comment #15 from Richard Biener <rguenth at gcc dot gnu.org> ---
For both loads and stores we do

              else if (DR_MISALIGNMENT (first_dr) == -1)
                {
                  TREE_TYPE (data_ref)
                    = build_aligned_type (TREE_TYPE (data_ref),
                                          TYPE_ALIGN (elem_type));
                  align = TYPE_ALIGN_UNIT (elem_type);
                  misalign = 0;

but TYPE_ALIGN (elem_type) doesn't always hold.