[jdk18u] RFR: 8285394: Compiler blackholes can be eliminated due to stale ciMethod::intrinsic_id()

[Aleksey Shipilev]

Unclean backport to fix Blackhole behavior. The test does not work until we add another `IRNode` constant. Otherwise the test passes with the fix, and fails without it.

Additional testing:
 - [x] New test

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

Commit messages:
 - Add missing IRNode.MUL_L
 - Backport ce8db2c40378de01ce35ca37ec315af47974d6d6

Changes: https://git.openjdk.java.net/jdk18u/pull/116/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=116&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8285394
  Stats: 111 lines in 3 files changed: 108 ins; 3 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/116.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/116/head:pull/116

PR: https://git.openjdk.java.net/jdk18u/pull/116