[Bug rtl-optimization/68636] unnecessary unaligned load on mips o32

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68636

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok x86_64 I get

  if (zeroIsCavium_2 == 0)
    goto <bb 4>;
  else
    goto <bb 3>;

  <bb 3>:

  <bb 4>:
  # PT = nonlocal
  # ALIGN = 536870912, MISALIGN = 8388720
  # iftmp.0_1 = PHI <3229614192B(2), 2692743280B(3)>
  _4 ={v} *iftmp.0_1;
  x ={v} _4;
  return;

thus alignment should be sufficient and *iftmp.0_1 should expand to an aligned
load.  So you have to dig into RTL expansion to see where it goes wrong for
you.