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Runtime fixes for the Java back-end.
java/runtime/DuExistLocn.java:
java/runtime/DuFunctorDesc.java:
java/runtime/DuPtagLayout.java:
Define constructors for these types.
java/runtime/MaybeResAddrFunctorDesc.java:
New file (corresponds to MR_MaybeResAddrFunctorDesc type in C).
java/runtime/MaybeResFunctorDesc.java:
New file (corresponds to MR_MaybeResFunctorDesc type in C).
java/runtime/PseudoTypeInfo.java:
Define constructors.
Make non-abstract (XXX temp work-around only).
java/runtime/TypeCtorInfo_Struct.java:
XXX Pass some parameters of the constructor as "Object",
to work around type errors in invocations of those constructors.
java/runtime/TypeFunctors.java:
java/runtime/TypeLayout.java:
Model the C unions better; use a single field, with accessor
functions that convert to each alternative, not several fields.
java/runtime/TypeclassInfo.java:
Implement as stub (previous code was just copy of TypeInfo.java).
java/runtime/VA_PseudoTypeInfo_Struct*.java:
Fix a bug: change the order of the constructor parameters
to match the way we generate code which invokes those constructors.
