RFR: 8285390: PPC64: Handle integral division overflow during parsing

[Martin Doerr]

Move check for possible overflow from backend into ideal graph (like on x86). Makes the .ad file smaller. I'll add performance results, later.

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Commit messages:
 - 8285390: PPC64: Handle integral division overflow during parsing

Changes: https://git.openjdk.java.net/jdk/pull/8343/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8343&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285390
  Stats: 126 lines in 2 files changed: 0 ins; 106 del; 20 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8343.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8343/head:pull/8343

PR: https://git.openjdk.java.net/jdk/pull/8343