[Bug target/21616] [3.4 only] ICE: unable to find a register to spill in class `FLOAT_REGS'

["dje at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #8 from dje at gcc dot gnu dot org  2006-02-09 19:30 -------
Try adding the legitimize_reload_address fragment for unaligned offset from
gcc-4.X:

  /* Force ld/std non-word aligned offset into base register by wrapping
     in offset 0.  */
  if (GET_CODE (x) == PLUS
      && GET_CODE (XEXP (x, 0)) == REG
      && REGNO (XEXP (x, 0)) < 32
      && REG_MODE_OK_FOR_BASE_P (XEXP (x, 0), mode)
      && GET_CODE (XEXP (x, 1)) == CONST_INT
      && (INTVAL (XEXP (x, 1)) & 3) != 0
      && !ALTIVEC_VECTOR_MODE (mode)
      && GET_MODE_SIZE (mode) >= UNITS_PER_WORD
      && TARGET_POWERPC64)
    {
      x = gen_rtx_PLUS (GET_MODE (x), x, GEN_INT (0));
      push_reload (XEXP (x, 0), NULL_RTX, &XEXP (x, 0), NULL,
                   BASE_REG_CLASS, GET_MODE (x), VOIDmode, 0, 0,
                   opnum, (enum reload_type) type);
      *win = 1;
      return x;
    }


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21616