Adding "Classpath" exception to the classes in the com.oracle.truffle.api and the com.oracle.truffle.api.dsl package.
Add new checkstyle checks for com.oracle.truffle.api that include a check for "Classpath" exception in the file header.
Merge.
Made Word.box() private: Outside users should use the different signed() and unsigned() methods to ensure proper expansion of 32-bit values on 64-bit systems.
Fix canonicalization of conditional nodes, add a test for this bug
Merge.