git: openjdk/jdk: 8257221: C2: RegMask::is_bound_set split set handling broken since JDK-8221404

[Claes Redestad]

Changeset: 9bcd2695
Author:    Claes Redestad <redestad at openjdk.org>
Date:      2020-11-30 08:18:32 +0000
URL:       https://git.openjdk.java.net/jdk/commit/9bcd2695

8257221: C2: RegMask::is_bound_set split set handling broken since JDK-8221404

Reviewed-by: kvn, neliasso

! src/hotspot/share/opto/regmask.cpp
! test/hotspot/gtest/opto/test_regmask.cpp