Read version 51 (JDK 7) class files.

This commit makes the ClassFileReader/ICodeReader parse class files
from JDK 7 (class file version 51). It does that by skipping over
the method handle related entries in the constant pool and by doing
some dummy processing on invoke dynamic instructions. The inliner
is updated to not try to inline a method with an invoke dynamic
instruction. A place holder INVOKE_DYNAMIC instruction is added to ICode
but it is designed to create an error if there's ever any attempt to
analyze it. Because the inliner is the only phase that ever tries
to analyze ICode instructions not generated from Scala source and
because Scala source will never emit an INVOKE_DYNAMIC, the place
holder INVOKE_DYNAMIC should never cause any errors.

A test is included that generates a class file with INVOKE_DYNAMIC
and then compiles Scala code that depends on it.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/reflect/scala/reflect/internal/ClassfileConstants.scala b/src/reflect/scala/reflect/internal/ClassfileConstants.scala
index 7ccb661426..c198271fb1 100644
--- a/src/reflect/scala/reflect/internal/ClassfileConstants.scala
+++ b/src/reflect/scala/reflect/internal/ClassfileConstants.scala
@@ -72,6 +72,9 @@ object ClassfileConstants {
   final val CONSTANT_METHODREF     = 10
   final val CONSTANT_INTFMETHODREF = 11
   final val CONSTANT_NAMEANDTYPE   = 12
+  final val CONSTANT_METHODHANDLE  = 15
+  final val CONSTANT_METHODTYPE    = 16
+  final val CONSTANT_INVOKEDYNAMIC = 18
 
   // tags describing the type of a literal in attribute values
   final val BYTE_TAG   = 'B'
@@ -306,7 +309,7 @@ object ClassfileConstants {
   final val invokespecial   = 0xb7
   final val invokestatic    = 0xb8
   final val invokeinterface = 0xb9
-  final val xxxunusedxxxx   = 0xba
+  final val invokedynamic   = 0xba
 
   final val new_          = 0xbb
   final val newarray      = 0xbc