RFR: 8341834: C2 compilation fails with "bad AD file" due to Replicate [v2]

[Roland Westrelin]

> Superword creates a `Replicate` node at a `ConvL2I` node and uses the
> type of the result of the `ConvL2I` to pick the type of the
> `Replicate` instead of the type of the input to the `ConvL2I`.

Roland Westrelin has updated the pull request incrementally with one additional commit since the last revision:

  review

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21660/files
  - new: https://git.openjdk.org/jdk/pull/21660/files/4678caf2..1070696f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21660&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21660&range=00-01

  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21660.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21660/head:pull/21660

PR: https://git.openjdk.org/jdk/pull/21660