RFR: 8283451: C2: assert(_base == Long) failed: Not a Long [v2]

[Roland Westrelin]

> The code in PhaseIterGVN::no_dependent_zero_check() tests for a top
> input by checking if is_top() is true but in this case the node has
> type top but is not yet transformed to top (after CCP).

Roland Westrelin has updated the pull request incrementally with one additional commit since the last revision:

  review

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7902/files
  - new: https://git.openjdk.java.net/jdk/pull/7902/files/eca58ac5..82094cde

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7902&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7902&range=00-01

  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7902.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7902/head:pull/7902

PR: https://git.openjdk.java.net/jdk/pull/7902