[Bug rtl-optimization/65371] arm loop with volatile variable

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65371

Richard Biener <rguenth at gcc dot gnu.org> changed:

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

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
On x86 I see

func:
.LFB0:
        .cfi_startproc
        movq    67112960, %rax
        orq     $65536, %rax
        movq    %rax, 67112960
.L2:
        movq    67112960, %rax
        testl   $131072, %eax
        je      .L2
        movq    67112960, %rax
        orq     $16777216, %rax
        movq    %rax, 67112960
        ret

not very optimal for -Os either.