git: openjdk/jdk17u: master: 8268261: C2: assert(n != __null) failed: Bad immediate dominator info.

[Vladimir Kozlov]

Changeset: de808a5e
Author:    Vladimir Kozlov <kvn at openjdk.org>
Date:      2021-08-02 21:05:32 +0000
URL:       https://git.openjdk.java.net/jdk17u/commit/de808a5e92d6fde98b0e147299550cde7fd0fa3c

8268261: C2: assert(n != __null) failed: Bad immediate dominator info.

Backport-of: 4ed548b3eeffe8dfa601d4d0eeed2bfe359af965

! src/hotspot/share/opto/loopTransform.cpp
+ test/hotspot/jtreg/compiler/loopopts/TestIdomAfterLoopUnswitching.java