RFR: 8311646: ZGC: LIR_OpZStoreBarrier::_info shadows LIR_Op::_info

[Chad Rakoczy]

[JDK-8311646](https://bugs.openjdk.org/browse/JDK-8311646)

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Commit messages:
 - 8311646: ZGC: LIR_OpZStoreBarrier::_info shadows LIR_Op::_info

Changes: https://git.openjdk.org/jdk/pull/14816/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14816&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311646
  Stats: 4 lines in 1 file changed: 0 ins; 2 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/14816.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14816/head:pull/14816

PR: https://git.openjdk.org/jdk/pull/14816