RFR: 8297294: compiler/c2/irTests/TestMulNodeIdealization.java failed compilation [v2]

[Vicente Romero]

> Given that the reported issue is intermittent I think we have two options here:
> 
> - change the most probable use of a non-deterministic data structure that could be provoking this bug, to a deterministic one
> - change all uses of non-deterministic data structures
> 
> The current fix is going for the first option, if preferred I can provide another patch that fixes all uses of non-deterministic data structures in our inference engine. I don't think we will have any performance impact going for the second option but it could be unnecessary.
> 
> Comments?
> TIA

Vicente Romero has updated the pull request incrementally with two additional commits since the last revision:

 - Merge branch 'JDK-8297294' of https://github.com/vicente-romero-oracle/jdk into JDK-8297294
 - 8297294: compiler/c2/irTests/TestMulNodeIdealization.java failed compilation

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/11437/files
  - new: https://git.openjdk.org/jdk/pull/11437/files/49e3b88a..f1d9e3cd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=11437&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=11437&range=00-01

  Stats: 5 lines in 2 files changed: 0 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/11437.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11437/head:pull/11437

PR: https://git.openjdk.org/jdk/pull/11437