Summary:<br>* Investigate conditional compare.<br><br>Details:<br>1. Expand conditional compare as TRUTH_AND_EXPR/TRUTH_IOR_EXPR for tests.<br>2. Test tree-level changes for conditional compare.<br>  * Fix/workaround most ICE issues in regression tests.<br>

  * Still some fails which expected VRP can optimize the cases.<br>3. Try to build Coremark and find that conditional compare does block optimizations, which leads to worse performance.<br><br>Plan:<br>* Investigate VRP and other optimizations to handle conditional compare.<br>

* Raise the propose for upstream discussion.<br><br>Planned leaves:<br>* April 4-8: Chinese Ching Ming Festival and annual leaves.<br>* April 12: Internal team event.<br>* April 16-17: Internal training.<br><br>Best Regards!<br>

-Zhenqiang<br><br>