NO_LOWEST_ACTIVE_REG
unsigned lowest_active_reg = NO_LOWEST_ACTIVE_REG;
if (lowest_active_reg == NO_LOWEST_ACTIVE_REG)
lowest_active_reg = NO_LOWEST_ACTIVE_REG;
lowest_active_reg = NO_LOWEST_ACTIVE_REG;
if (lowest_active_reg == NO_LOWEST_ACTIVE_REG)