RFR: 8267237: ARM32: bad AD file in matcher.cpp after 8266810

[Claes Redestad]

On Mon, 17 May 2021 10:48:17 GMT, Christoph Göttschkes <cgo at openjdk.org> wrote:

> It appears that [JDK-8266810](https://bugs.openjdk.java.net/browse/JDK-8266810) introduced regression into aarch32. Many JTreg tests are failing with:
> 
> #  Internal Error (/var/jnode/openjdk-build-ws/workspace/openjdk-build/jdk/jdk-arm-linux-gnueabihf/jdk/src/hotspot/share/opto/matcher.cpp:1670), pid=15030, tid=15047
> #  assert(false) failed: bad AD file
> 
> 
> Testing: hotspot tier1 on ARMv7-A / linux

@mychris I'd be happy to sponsor this. Initiate integration by commenting with /integrate

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PR: https://git.openjdk.java.net/jdk/pull/4053