[Bug target/93738] [13/14/15/16 regression] test case gcc.target/powerpc/20050603-3.c fails

[segher at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93738

--- Comment #15 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Kishan Parmar from comment #13)
> Operand of 10 gets converted to below insn
> 
> (and:SI (subreg:SI (lshiftrt:DI (reg:DI 129 [ x+-4 ])
>             (const_int 12 [0xc])) 4)
>     (const_int 3840 [0xf00]))

And that is not optimised.  simplify-rtx should move the subreg further in,
but it apparently doesn't.