git: openjdk/jdk17u-dev: 8287432: C2: assert(tn->in(0) != __null) failed: must have live top node

[Goetz Lindenmaier]

Changeset: d3354af9
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2022-07-03 18:58:35 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/d3354af99f10a9cbf3debd101f84c419ae756248

8287432: C2: assert(tn->in(0) != __null) failed: must have live top node

Backport-of: 78d371266ae8a629db8176ced4d48e9521702cce

! src/hotspot/share/opto/compile.cpp
+ test/hotspot/jtreg/compiler/c2/TestRemoveMemBarPrecEdge.java