[lworld] Initial C1 implementation for -XX:ACmpOnValues=3

Implement basic (unoptimized) functionality in C1 for passing all tests in http://hg.openjdk.java.net/valhalla/valhalla/file/ac891b47cc41/test/hotspot/jtreg/compiler/valhalla/valuetypes/TestNewAcmp.java with -XX:ACmpOnValues=3

http://cr.openjdk.java.net/~iklam/valhalla/8223729-initial-c1-acmp-on-values-3.v01/

More optimizations will be in subsequent RFEs.