RFR: 8264151: ciMethod::ensure_method_data() should return false is loading resulted in empty state [v2]

[Igor Veresov]

> ciMethodData::load_data() can set the state of the MDO to empty (if it's replaying a compile). In this case we should return false from ensure_method_data().

Igor Veresov has updated the pull request incrementally with one additional commit since the last revision:

  Address Dean's comments

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3184/files
  - new: https://git.openjdk.java.net/jdk/pull/3184/files/ecff0dac..f4c6b851

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3184&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3184&range=00-01

  Stats: 12 lines in 3 files changed: 4 ins; 4 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3184.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3184/head:pull/3184

PR: https://git.openjdk.java.net/jdk/pull/3184