[jdk17u-dev] RFR: 8274130: C2: MulNode::Ideal chained transformations may act on wrong nodes

[Aleksey Shipilev]

Unclean backport to fix the potential C2 bug. The uncleanliness comes from the fact that [JDK-8273454](https://bugs.openjdk.java.net/browse/JDK-8273454) is missing in 17, therefore its hunk is ignored. But the other change, [JDK-8263006](https://bugs.openjdk.java.net/browse/JDK-8263006) is present in 17, which still introduces the bug this fix addresses.

Additional testing:
 - [x] Linux x86_64 fastdebug `tier1`
 - [x] Linux x86_64 fastdebug `tier1`
 - [ ] Linux x86_64 fastdebug `tier3`

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Commit messages:
 - Backport 756d22c3563ac92e74bb68d5eecb86d4fbab2c6b

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/25/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=25&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274130
  Stats: 10 lines in 1 file changed: 5 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/25.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/25/head:pull/25

PR: https://git.openjdk.java.net/jdk17u-dev/pull/25