[lworld] RFR: 8325398: [lworld] C1 should not patch null restricted field stores

[Tobias Hartmann]

Follow-up from https://git.openjdk.org/valhalla/pull/994: We also need to deopt when patching a null-free field store because the compiled code is missing the null check.

Thanks,
Tobias

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Commit messages:
 - 8325398: [lworld] C1 should not patch null restricted field stores

Changes: https://git.openjdk.org/valhalla/pull/997/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=997&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325398
  Stats: 34 lines in 2 files changed: 33 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/997.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/997/head:pull/997

PR: https://git.openjdk.org/valhalla/pull/997