RFR: 8279822: CI: Constant pool entries in error state are not supported

[Vladimir Ivanov]

Testing: hs-tier1 - hs-tier6

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Commit messages:
 - Compiler support of CP entries in error state

Changes: https://git.openjdk.java.net/jdk/pull/7314/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7314&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279822
  Stats: 451 lines in 10 files changed: 361 ins; 48 del; 42 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7314.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7314/head:pull/7314

PR: https://git.openjdk.java.net/jdk/pull/7314