Avoid storing statistics about OSR compilations.
Make arithmetic nodes extensible.
Add custom constructor to VirtualInstanceNode.
Introduce Frame.isInitialized in the Truffle API.
Windows build fix: compiler warning "not all control paths return a value" in CodeInstaller::pd_next_offset.

--HG--
extra : rebase_source : 20684bd4786df7f6fb2fff22322ee453ef2ca19f
Removed the probability fix temporarily.
Merge.
Fixed a warning.
Remove blank line
Slightly simplified inlining policy.
more checks for ArrayCopyNode virtualization
Merge (60648c97cdd0 Windows build fix...)
Merge (1b33ef6544b4 Fixed a warning)
Refactor CompressedOopTest
Refactor CodeInstaller and CompilerToVM
Remove check for classMirrorOffset in LoadField
Add comments in unsafe access of uncompressed pointers
Temporarily enabled printing of inlining decisions.
Disabled printing of inlining decisions.
Merge.