[Bug tree-optimization/71307] Poor code quality with lane extraction arm_neon.h intrinsics on aarch64

[rsandifo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71307

rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rsandifo at gcc dot gnu.org

--- Comment #6 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> ---
Created attachment 42176
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42176&action=edit
Possible fix

The attached patch in combination with r252033 seems to fix it for me.
The patch is from the SVE series, which needs to add a union class
of POINTER+FP anyway because of the presence of predicate registers.

Would appreciate more testing as to whether this is a good thing or not
in general.