hg: jdk-updates/jdk11u-dev: 8265938: C2's conditional move optimization does not handle top Phi

[rwestrel at redhat.com]

Changeset: 0c2a14167fee
Author:    thartmann
Date:      2021-04-27 17:10 +0000
URL:       https://hg.openjdk.java.net/jdk-updates/jdk11u-dev/rev/0c2a14167fee

8265938: C2's conditional move optimization does not handle top Phi
Reviewed-by: chagedorn, kvn, iignatyev

! src/hotspot/share/opto/loopopts.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestCMoveWithDeadPhi.java
! test/hotspot/jtreg/compiler/loopopts/TestStrangeControl.java