[jdk15u-dev] RFR: 8263361: Incorrect arraycopy stub selected by C2 for SATB collectors

[Sergey Nazarkin]

Hi!
I'd like to backport this patch that fixes hotspot debug builds crash. The patch doesn't apply cleanly due to miss of 8252848. The manual fix is required for **macroArrayCopy.cpp:553**: rename **dest_uninitialized** to **acopy_to_uninitialized**

Pass tier(1,2}

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Commit messages:
 - Backport 5d87a21991b964e1c50495dc2dc982db425830b5

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/52/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=52&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/jdk15u-dev/pull/52.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/52/head:pull/52

PR: https://git.openjdk.java.net/jdk15u-dev/pull/52