Request for review (M): 6998541: JSR 292 implement missing return-type conversion for OP_RETYPE_RAW

[Christian Thalinger]

http://cr.openjdk.java.net/~twisti/6998541

6998541: JSR 292 implement missing return-type conversion for OP_RETYPE_RAW
Reviewed-by: jrose

There is an unimplemented path in the MethodHandleWalker for
OP_RETYPE_RAW return-type conversions.

This change also includes a couple of x86 fixes found by John Rose,
removes the check for genericInvoker on x86 and SPARC and some
miscellaneous fixes (e.g. MethodHandlePrinter output).

There is also a test for the type conversions which will be pushed
later into the JDK 7 repository.

src/cpu/sparc/vm/methodHandles_sparc.cpp
src/cpu/x86/vm/methodHandles_x86.cpp
src/share/vm/prims/methodHandleWalk.cpp
src/share/vm/prims/methodHandleWalk.hpp
src/share/vm/prims/methodHandles.cpp
src/share/vm/prims/methodHandles.hpp