[Bug middle-end/90323] powerpc should convert equivalent sequences to vec_sel()

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90323

--- Comment #13 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to luoxhu from comment #11)
> I noticed that you added the below optimization with commit
> a62436c0a505155fc8becac07a8c0abe2c265bfe. But it doesn't even handle this
> case, cse1 pass will call simplify_binary_operation_1, both op0 and op1 are
> REGs instead of AND operators, do you have a test case to cover that piece
> of code?

This worked at the time.  It broke some time ago in simple testcases,
triggered by the "don't combine hard registers" thing I did.  This is
PR98468.