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

[rearnsha at gcc dot gnu.org]

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

Richard Earnshaw <rearnsha at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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          Component|target                      |tree-optimization

--- Comment #12 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
> but the arm hook seems to say "yes, I can vectorize with V2DImode
> for a vector with element type unsigned long long __attribute__((aligned(1)))"
> which it obviously cannot.

It can vectorize for this case, but the loads must not be marked as aligned
loads.  That is, the mid-end must use the misaligned code hooks.

So I don't think this is a target bug.