[jdk11u-dev] RFR: 8272574: C2: assert(false) failed: Bad graph detected in build_loop_late

[Martin Doerr]

Clean backport of JDK-8272574.

-------------

Commit messages:
 - Backport 16c3ad1ff4d9a0e21f15656c73a96a6c143c811a

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/519/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=519&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272574
  Stats: 96 lines in 4 files changed: 91 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/519.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/519/head:pull/519

PR: https://git.openjdk.java.net/jdk11u-dev/pull/519