CLEAR_HARD_REG_SET (all_btrs);
for (first_btr = -1, reg = 0; reg < FIRST_PSEUDO_REGISTER; reg++)
if (TEST_HARD_REG_BIT (reg_class_contents[(int) btr_class], reg)
- && (allow_callee_save || call_used_regs[reg]
+ && (allow_callee_save || call_used_regs[reg]
|| df_regs_ever_live_p (reg)))
{
SET_HARD_REG_BIT (all_btrs, reg);