[jdk13u-dev] RFR: 8263361: Incorrect arraycopy stub selected by C2 for SATB collectors

[Sergey Nazarkin]

I'd like to backport this patch that fixes hotspot debug builds crash. The patch is required for further activity to keep backports clean.  The changes are taken from jdk15 and requires some manual intervention at src/hotspot/share/opto/library_call.cpp due to missed 8235653 (it removes line with obj = access_resolve(obj, ACCESS_READ);). 

I've not touched 8235653 because its low priority and  dependency on a set of other commits

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Commit messages:
 - Backport 5d87a21991b964e1c50495dc2dc982db425830b5

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/238/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=238&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8263361
  Stats: 42 lines in 3 files changed: 10 ins; 0 del; 32 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/238.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/238/head:pull/238

PR: https://git.openjdk.java.net/jdk13u-dev/pull/238