hg: jdk7/hotspot-comp/hotspot: 6747051: Improve code and implicit null check generation for compressed oops

[vladimir.kozlov at sun.com]

Changeset: 36ccc817fca4
Author:    kvn
Date:      2008-09-23 12:29 -0700
URL:       http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/36ccc817fca4

6747051: Improve code and implicit null check generation for compressed oops
Summary: Push DecodeN node below the Null check to the non-null path to use the mach node without 0 test.
Reviewed-by: rasbold, never

! src/share/vm/asm/assembler.cpp
! src/share/vm/opto/cfgnode.cpp
! src/share/vm/opto/compile.cpp
! src/share/vm/opto/connode.cpp
! src/share/vm/opto/matcher.cpp
! src/share/vm/opto/matcher.hpp