[jdk11u-dev] RFR: 8299259: C2: Div/Mod nodes without zero check could be split through iv phi of loop resulting in SIGFPE

Mon May 29 19:24:00 UTC 2023

First I had to resolve due to Context and the Copyright. 

To make it work I 
replaced call is_BaseCountedLoop() by is_CountedLoop().
CountedLoop was split into two flavors in 17, BaseCountedLoop
subsuming both.

I removed one of the test specifications because flag StressSeed is not in 11.

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Commit messages:
 - Backport 8b0133f2760f67cd968528c041a600408cc26978

Changes: https://git.openjdk.org/jdk11u-dev/pull/1910/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1910&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299259
  Stats: 202 lines in 3 files changed: 188 ins; 11 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1910.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/1910/head:pull/1910

PR: https://git.openjdk.org/jdk11u-dev/pull/1910