[lworld] RFR: 8260225: [lworld] C1's delayed load indexed optimization sets incorrect type

[Tobias Hartmann]

`LoadIndexed::exact_type()` and `declared_type` return and incorrect type if the load is delayed. See bug report for a detailed description.

Thanks,
Tobias

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

Commit messages:
 - 8260225: [lworld] C1's delayed load indexed optimization sets incorrect type

Changes: https://git.openjdk.java.net/valhalla/pull/310/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=310&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260225
  Stats: 19 lines in 3 files changed: 15 ins; 1 del; 3 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/310.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/310/head:pull/310

PR: https://git.openjdk.java.net/valhalla/pull/310