[jdk13u-dev] RFR: 8233941: Generated Pipeline_Use_Cycle_Mask::operator= interferes with memcpy updates

[Yuri Nesterenko]

The issue may be fixed in 13u by this change. Clean patch.

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Commit messages:
 - Backport e0f7b0837637c91edf236dc34d0df53f7ec35d5e

Changes: https://git.openjdk.org/jdk13u-dev/pull/361/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=361&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8233941
  Stats: 9 lines in 1 file changed: 0 ins; 9 del; 0 mod
  Patch: https://git.openjdk.org/jdk13u-dev/pull/361.diff
  Fetch: git fetch https://git.openjdk.org/jdk13u-dev pull/361/head:pull/361

PR: https://git.openjdk.org/jdk13u-dev/pull/361