[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 #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 36099
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36099&action=edit
patch

I am testing the attached (on x86_64-linux), it fixes the testcase with a cross
to arm.  Full testing on arm appreciated.