[jdk11u-dev] RFR: 8258894: C2: Forbid GCM to move stores into loops

Fri Oct 7 20:10:00 UTC 2022

I backport this for parity with 11.0.18-oracle.

Two copyrights had to be resolved.

I had to resolve two hunks in generateOptoStub.cpp. Simple.
There is #ifdef SPARC code that is left out by the
change. 
I edited it canonically (quite obvious), but did not test it.

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Commit messages:
 - Backport f353fcf2569f5435d1410a83265c425d6385fc3f

Changes: https://git.openjdk.org/jdk11u-dev/pull/1401/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1401&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8258894
  Stats: 239 lines in 7 files changed: 192 ins; 5 del; 42 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1401.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1401/head:pull/1401

PR: https://git.openjdk.org/jdk11u-dev/pull/1401