hg: jdk7/hotspot-rt/hotspot: 7023931: PcDescCache::find_pc_desc should not write _last_pc_desc

[paul.hohensee at oracle.com]

Changeset: 3d5a546351ef
Author:    phh
Date:      2011-03-11 16:09 -0500
URL:       http://hg.openjdk.java.net/jdk7/hotspot-rt/hotspot/rev/3d5a546351ef

7023931: PcDescCache::find_pc_desc should not write _last_pc_desc
Summary: Remove _last_pc_desc and use pcdescs[0] instead.
Reviewed-by: dcubed, coleenp, ysr

! src/share/vm/code/nmethod.cpp
! src/share/vm/code/nmethod.hpp