RFR: 8311087: PhiNode::wait_for_region_igvn should break early [v2]

[Johan Sjölen]

> Hi, please consider this PR.
> 
> Instead of continuing the loop we break after setting `delay = true`. I also flattened out the indentation by transforming `A && B` into `!A || !B` and `continue`ing if so. This makes the code a bit longer, but clearer imho.
> 
> I've run `TestCastIIAfterUnrollingInOuterLoop`, which is the test that was added along with this method. I'm also running tier1.
> 
> Thanks,
> Johan

Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:

  Wrap continue in braces

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/14707/files
  - new: https://git.openjdk.org/jdk/pull/14707/files/9dc51e1c..a327dd14

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14707&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14707&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/14707.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14707/head:pull/14707

PR: https://git.openjdk.org/jdk/pull/14707