Request for reviews (XS): 7106774: JSR 292: nightly test inlineMHTarget fails with wrong result

[Christian Thalinger]

http://cr.openjdk.java.net/~twisti/7106774/

7106774: JSR 292: nightly test inlineMHTarget fails with wrong result
Reviewed-by:

The problem is in code which was added with 7090904 that checks if the
call site is a method handle invoke.  The new code uses
Bytecode::code() and compares the result to Bytecodes values:

    if (cur.code() == Bytecodes::_invokedynamic ||
        (cur.code() == Bytecodes::_invokevirtual &&

But an invokevirtual can be quickened so that the resulting Bytecode
is a different one:

(dbx) n
t at 2 (l at 2) stopped in Deoptimization::fetch_unroll_info_helper at line 393 in file "deoptimization.cpp"
  393       if (cur.code() == Bytecodes::_invokedynamic ||
(dbx) p cur.code()
cur.code() = _fast_invokevfinal

The fix is to use Bytecode_invoke::is_invokevirtual() and
is_invokedynamic() which use Bytecode::java_code().

Tested with failing test case.

src/share/vm/interpreter/bytecode.hpp
src/share/vm/runtime/deoptimization.cpp