RFR: 8260407: cmp != __null && cmp->Opcode() == Op_CmpL failure with -XX:StressLongCountedLoop=200000000 in lucene [v2]

[Roland Westrelin]

> Long counted loops are transformed in 3 steps:
> 
> 1- LongCountedLoopNode/LongCountedLoopEndNode are created (similar to
> int counted loops)
> 
> 2- a loop nest is built from the
> LongCountedLoopNode/LongCountedLoopEndNode with an inner loop with a
> int iv
> 
> 3- the inner loop is transformed to a CountedLoop
> 
> Between 1- and 2-, the LongCountedLoopEndNode is transformed by split
> if because a dominated if uses the same condition. Fix simplys applies
> existing check for CountedLoopEndNode to LongCountedLoopEndNode.

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

  copyright

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2240/files
  - new: https://git.openjdk.java.net/jdk/pull/2240/files/8b3312aa..d1f32df7

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2240&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2240&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2240.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2240/head:pull/2240

PR: https://git.openjdk.java.net/jdk/pull/2240