RFR: JDK-8322572: AllocationMergesTests.java fails with "IRViolationException: There were one or multiple IR rule failures." [v2]

[Cesar Soares Lucas]

> Please review this PR to fix a test in `AllocationMergesTest.java`. The test was failing intermittently because of a random value used as parameter was causing some randomization in the shape method's IR graph and consequently the optimization tested wasn't happening.
> 
> Tested this locally on Mac, Win and Linux x86_64.

Cesar Soares Lucas has updated the pull request incrementally with one additional commit since the last revision:

  fix spacing.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/17469/files
  - new: https://git.openjdk.org/jdk/pull/17469/files/bfbb757c..868d988d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17469&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17469&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17469.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17469/head:pull/17469

PR: https://git.openjdk.org/jdk/pull/17469