RFR: 8279143: Undefined behaviours in globalDefinitions.hpp

[Quan Anh Mai]

Hi,

This patch replaces undefined behaviours in globalDefinitions.hpp by proper well-defined ones.

Thank you very much.

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Commit messages:
 - clean
 - Merge branch 'master' into undefinedBehaviour
 - Merge branch 'master' of github.com:MeryKitty/jdk into undefinedBehaviour
 - implementation limits
 - const reference
 - words not need to be initialized
 - undefined behaviour in globalDefinitions.hpp

Changes: https://git.openjdk.java.net/jdk/pull/6930/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6930&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279143
  Stats: 44 lines in 4 files changed: 14 ins; 9 del; 21 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6930.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6930/head:pull/6930

PR: https://git.openjdk.java.net/jdk/pull/6930