RFR: 8262299: C2 compilation fails with "modified node was not processed by IGVN.transform_old()"

Wed Feb 24 12:51:46 UTC 2021

We hit an assert because a dead `MergeMemNode` was not removed. Make sure it's added to the IGVN worklist to give it a chance to be removed.

Thanks,
Tobias

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

Commit messages:
 - 8262299: C2 compilation fails with "modified node was not processed by IGVN.transform_old()"

Changes: https://git.openjdk.java.net/jdk/pull/2705/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2705&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8262299
  Stats: 10 lines in 1 file changed: 6 ins; 4 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2705.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2705/head:pull/2705

PR: https://git.openjdk.java.net/jdk/pull/2705