hg: jdk7/hotspot-comp/hotspot: 6814842: Load shortening optimizations

[Christian.Thalinger at Sun.COM]

Changeset: 2056494941db
Author:    twisti
Date:      2009-05-13 00:45 -0700
URL:       http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/2056494941db

6814842: Load shortening optimizations
Summary: 6797305 handles load widening but no shortening which should be covered here.
Reviewed-by: never, kvn

! src/cpu/sparc/vm/sparc.ad
! src/cpu/x86/vm/x86_32.ad
! src/cpu/x86/vm/x86_64.ad
! src/share/vm/adlc/output_c.cpp
+ test/compiler/6814842/Test6814842.java