  We performed ultrasonic and temperature measurements under pulsed magnetic
fields on CeIrIn$_5$ to investigate whether or not the origin of metamagnetic
transition and field-induced Lifshitz transition was described by the
anisotropic electronic ordering with crystal symmetry breaking. We observed
elastic anomalies with the negative magnetocaloric effects around the
field-induced Lifshitz transition and the metamagnetic transition. On the other
hand, the elastic anomalies appeared both in the transverse elastic constants
$(C_{11} - C_{12})/2$ and $C_{66}$ in CeIrIn$_5$ while $(C_{11} - C_{12})/2$
showed significant elastic anomaly at the crystal symmetry breaking fields in
CeRhIn$_5$. These results indicate that the anisotropic electronic ordering
with crystal symmetry breaking is absent in high-magnetic fields in
CeIrIn$_{5}$.
