hg: hsx/hotspot-comp/hotspot: 7143491: G1 C2 CTW: assert(p2x->outcnt() == 2) failed: expects 2 users: Xor and URShift nodes

[vladimir.kozlov at oracle.com]

Changeset: b9bc6cae88f2
Author:    kvn
Date:      2012-02-07 16:33 -0800
URL:       http://hg.openjdk.java.net/hsx/hotspot-comp/hotspot/rev/b9bc6cae88f2

7143491: G1 C2 CTW: assert(p2x->outcnt() == 2) failed: expects 2 users: Xor and URShift nodes
Summary: Adjust the assert and code in eliminate_card_mark() method for case when stored value is NULL.
Reviewed-by: iveresov, never

! src/share/vm/opto/graphKit.cpp
! src/share/vm/opto/library_call.cpp
! src/share/vm/opto/macro.cpp