[jdk21u-dev] RFR: 8328822: C2: "negative trip count?" assert failure in profile predicate code [v2]

[Aleksey Shipilev]

> Simple corner case fix in C2.
> 
> Additional testing:
>   - [x] New regression test fails without the fix, passes with it
>   - [x] Linux x86_64 server fastdebug, `all`
>   - [x] Linux x86_64 server fastdebug, 100K Fuzzer tests

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' into JDK-8328822-c2-neg-trip-count
 - Backport 2ceeb6c00135310b7bdabacb92d26d81de525240

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/497/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/497/files/e69e026e..eccffd94

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=497&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=497&range=00-01

  Stats: 1397 lines in 63 files changed: 743 ins; 433 del; 221 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/497.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/497/head:pull/497

PR: https://git.openjdk.org/jdk21u-dev/pull/497