hg: jdk10/hs/hotspot: 8186666: Bug in the C2 matcher code

[rahul.v.raghavan at oracle.com]

Changeset: 18bf814595b9
Author:    rraghavan
Date:      2017-08-28 02:55 -0700
URL:       http://hg.openjdk.java.net/jdk10/hs/hotspot/rev/18bf814595b9

8186666: Bug in the C2 matcher code
Summary: Correctly used Op_WeakCompareAndSwapI as required
Reviewed-by: shade, thartmann
Contributed-by: Andrew Haley <aph at redhat.com>

! src/share/vm/opto/c2compiler.cpp