[lworld] RFR: 8282292: [lworld] runtime/valhalla/inlinetypes/WithFieldAccessorTest.java Xcomp C1 asserts

[Frederic Parain]

Please review this small patch fixing handling of illegal accesses in C1's implementation of withfield.

Thank you,

Fred

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Commit messages:
 - Withfield: insert deopt point if field is inaccessible

Changes: https://git.openjdk.java.net/valhalla/pull/659/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=659&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282292
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/659.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/659/head:pull/659

PR: https://git.openjdk.java.net/valhalla/pull/659