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

[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

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Commit messages:
 - 8297294: compiler/c2/irTests/TestMulNodeIdealization.java failed compilation

Changes: https://git.openjdk.org/jdk/pull/11437/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11437&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297294
  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 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