[Bug target/67288] [9/10/11/12 regression] non optimal simple function (useless additional shift/remove/shift/add)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67288

--- Comment #23 from Segher Boessenkool <segher at gcc dot gnu.org> ---
-m32 is required here.  With -fno-unroll-loops -m32 you now get

flush_dcache_range:
        rlwinm 3,3,0,0,27
        addi 4,4,15
        subf 4,3,4
        srwi. 4,4,4
        beqlr 0
        mtctr 4
        .p2align 4,,15
.L3:
        dcbf 0, 3
        addi 3,3,16
        bdnz .L3
        sync
        blr

So yup, it has been fixed.  Thanks!