hg: jdk/sandbox: 8228888: C2 compilation fails with assert "m has strange control"

[chris.hegarty at oracle.com]

Changeset: aff991f6e64d
Author:    thartmann
Date:      2019-08-20 07:47 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/aff991f6e64d

8228888: C2 compilation fails with assert "m has strange control"
Summary: Weakened too strong assert.
Reviewed-by: kvn, roland

! src/hotspot/share/opto/loopopts.cpp
+ test/hotspot/jtreg/compiler/loopopts/StrangeControl.jasm
+ test/hotspot/jtreg/compiler/loopopts/TestStrangeControl.java