hg: hsx/hotspot-comp/hotspot: 7170463: C2 should recognize "obj.getClass() == A.class" code pattern

[vladimir.kozlov at oracle.com]

Changeset: 8f6ce6f1049b
Author:    kvn
Date:      2012-05-25 07:53 -0700
URL:       http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/8f6ce6f1049b

7170463: C2 should recognize "obj.getClass() == A.class" code pattern
Summary: optimize this code pattern obj.getClass() == A.class.
Reviewed-by: jrose, kvn
Contributed-by: Krystal Mok <sajia at taobao.com>

! src/share/vm/opto/parse.hpp
! src/share/vm/opto/parse2.cpp
! src/share/vm/opto/subnode.cpp