[jdk21u-dev] RFR: 8324121: SIGFPE in PhaseIdealLoop::extract_long_range_checks [v2]

[Aleksey Shipilev]

> Clean backport to improve C2 reliability. 
> 
> Additional testing:
>  - [x] New test DOES NOT fail without the patch, passes with it
>  - [x] Linux x86_64 server fastdebug, `all` tests
>  - [x] Linux x86_64 server fastdebug, 100K Fuzzer tests
>  - [x] Linux x86_64 server fastdebug, Maven CTW 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:

 - Backport 05854fd704cba6ebd73007d9547a064891d49587
 - Backport cb2a6713596548d76c03912709656172b0bbcc76

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/488/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/488/files/9331b290..9d8d1780

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=488&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=488&range=00-01

  Stats: 1398 lines in 64 files changed: 744 ins; 433 del; 221 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/488.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/488/head:pull/488

PR: https://git.openjdk.org/jdk21u-dev/pull/488