Estimated hours taken: 18
Branches: main
Some fixes to the Java back-end to make it support RTTI
better. The aim is to at least be able to *compile* code
that makes use of polymorphism (e.g. the Mercury standard
library!), although that aim is not yet achieved with this diff.
Getting code which actually *uses* the RTTI to work is still
a long way off...
compiler/rtti.m:
compiler/mlds_to_java.m:
Fix some bugs in the code to output RTTI type names.
compiler/mlds_to_java.m:
Output the RTTI definitions. This is needed to avoid errors
in code which references them.
Handle initializers better; in particular deal with nested
initializers properly.
Pass the current module name down to output_lval, so that we can
module-qualify data names only if they occur in a different
module. This is needed to ensure that static data defined
in other modules gets module-qualified, but local variables don't.
This also required change some places which were incorrectly
calling output_fully_qualified_name to instead call output_name.
Add comments in the generated output code when generating
"java.lang.Object", so that it is clearer what kind of object
is involved.
Add some special treatment for the types with hand-defined RTTI.
java/runtime/*.java:
Add some definitions of RTTI types, and some new constructors
for the RTTI types that were already defined.
These are currently all just stubs.
Estimated hours taken: 2
Branches: main
Delete the univ type_ctor_rep, since we haven't used it in a long time,
and add two new type_ctor_reps: one for subgoals, so that they won't have
to be treated specially when deconstructed, and one for a future type,
stable_c_pointer, which is the same as c_pointer except that it guarantees
that the entire data structure it points to, directly and indirectly is
read only, which means that its values can be tabled. The intention is
to use stable_c_pointers to represent robdds.
runtime/mercury_type_info.h:
Make the change above.
runtime/mercury_construct.c:
runtime/mercury_deconstruct.c:
runtime/mercury_deep_copy_body.h:
runtime/mercury_ml_expand_body.h:
runtime/mercury_tabling.c:
runtime/mercury_unify_compare_body.h:
Handle the two new type_ctor_reps, and delete the code handling univs.
compiler/mlds_to_gcc.m:
java/runtime/TypeCtorRep.java:
library/private_builtin.m:
runtime/mercury_mcpp.h:
runtime/mercury_mcpp.cpp:
Update the list of type_ctor_reps, including fixing some old errors
in some files.
library/rtti_implementation.m:
Update the list of type_ctor_reps, and modify the routines that
interpret the RTTI accordingly.
Estimated hours taken: 6
Branches: main
Fix test case failures involving type_ctor_descs in .rt grades.
The cause of the failures was that the type_ctor_rep for type_ctor_descs (which
happens to be 35) does not fit into a signed 8-bit integer in .rt grades,
since those grade require 2 bits for a primary tag (3 bits on 64-bit machines).
The fix is to make the type_ctor_rep field in type_ctor_infos 16 bits in size.
To maintain alignment, this requires swapping that field with the num_ptags
field.
The second part of this change will remove the bootstrapping code and raise
the binary compatibility version number. That part cannot be committed until
this part has been installed on all our machines.
runtime/mercury_type_info.h:
Define a new version of the type_ctor_info structure with this swap
and size increase. Provide backward compatibility for bootstrapping.
runtime/mercury_mcpp.h:
library/rtti_implementation.m:
java/runtime/TypeCtorInfo_Struct.m:
Make the same change.
compiler/rtti_out.m:
compiler/rtti_to_mlds.m:
compiler/mlds_to_gcc.m:
Generate the new type_ctor_info structure.
compiler/llds_out.m:
compiler/mlds_to_c.m:
Generate a macro that selects the new version of the type_ctor_info
structure.
compiler/type_ctor_info.m:
Update the type_ctor_info version number.
Estimated hours taken: 40
Branches: main
Fix the RTTI of type_descs and type_ctor_descs. Make comparisons between
type_ctor_descs and type_ctor_infos (and therefore between type_descs and
type_infos) more predictable and consistent across backends by basing them
on programmer-visible attributes instead of accident of location in the
executable.
runtime/mercury_type_desc.[ch]:
Implement unification and comparison functions for type_ctor_descs.
(The unification and comparison functions for type_infos also double
as the unification and comparison functions for type_descs.)
Make the comparison function work on the module name, type name and
arity instead of the address of the type_ctor_info structure. This
ensures consistency across back ends.
Add some useful macros.
runtime/mercury_type_info.[ch]:
Make the comparison function on type_ctor_infos also work on module
name, type name and arity. Since this makes comparison slower, add
specialized unification functions for type_infos and type_ctor_infos.
runtime/mercury_type_info.h:
runtime/mercury_mcpp.{h,cpp}:
runtime/mercury.h:
library/private_builtin.m:
library/rtti_implementation.m:
java/runtime/TypeCtorRep.java:
compiler/mlds_to_gcc.m:
Add type_ctor_reps for type_descs and type_ctor_descs. Type_ctor_descs
definitely need it, since their representation is very low level and
not shared with anything else. Type_descs could use the type_ctor_rep
of type_infos, since type_descs and type_infos share the same
representation at the moment. However, we add a new one because
profiling cares about the conceptual distinction between type_infos
and type_descs.
library/type_desc.m:
Delete the Mercury "definition" of type_desc, because it is misleading.
Implement it as a builtin type.
runtime/mercury.[ch]:
Implement type_ctor_desc as a builtin type.
Add missing implementations of unify/compare on type_ctor_infos.
runtime/mercury_deconstruct.c:
runtime/mercury_ml_expand_body.h:
Implement deconstruction for type_descs and type_ctor_descs.
runtime/mercury_ho_call.c:
runtime/mercury_unify_compare_body.h:
Implement unify and compare for type_descs and type_ctor_descs.
Implement unify for type_infos, type_ctor_infos, type_descs and
type_ctor_descs by calling the relevant unification function,
not the relevant comparison function, since the unification
function will be faster.
runtime/mercury_deep_copy_body.h:
runtime/mercury_construct.c:
runtime/mercury_tabling.c:
Minor changes to handle type_descs and type_ctor_descs.
trace/mercury_trace_vars.c:
Enable the printing of type_descs and type_ctor_descs.
tests/debugger/type_desc_test.{m,inp,exp,exp2}:
New test case to check the printing of type_descs and type_ctor_descs.
tests/debugger/Mmakefile:
Enable the new test case.
tests/hard_coded/type_ctor_desc_manip.{m,exp}:
New test case to check the deconstruction and comparison of type_descs
and (especially) type_ctor_descs. Before this change, we got different
results for comparisons of type_ctor_descs, results that were
inconsistent with the results of comparisons of the type_descs
that the type_ctor_descs were derived from.
tests/hard_coded/Mmakefile:
Enable the new test case.
Estimated hours taken: 3
Branches: main
This change introduces some (partial) Java versions of the mercury library
which are currently needed to compile some .java files generated by the
mercury compiler for the tests/benchmarks test cases.
These additions are required temporarily for testing purposes until the
mercury library can be compiled in grade java.
mercury/java/Commit.java:
mercury/java/DuExistInfo.java:
mercury/java/DuExistLocn.java:
mercury/java/DuFunctorDesc.java:
mercury/java/DuPtagLayout.java:
mercury/java/EnumFunctorDesc.java:
mercury/java/JavaInternal.java:
mercury/java/MethodPtr.java:
mercury/java/NotagFunctorDesc.java:
mercury/java/PseudoTypeInfo.java:
mercury/java/Sectag_Locn.java:
mercury/java/TypeCtorInfo_Struct.java:
mercury/java/TypeCtorRep.java:
mercury/java/TypeFunctors.java:
mercury/java/TypeLayout.java:
mercury/java/UnreachableDefault.java:
All files that were located in the mercury/java directory have been
moved to mercury/java/runtime.
mercury/java/Makefile:
A simple Makefile to set up a couple of symbolic links so we can
just include the mercury/java directory in our CLASSPATH.
mercury/java/library/assoc_list.java:
mercury/java/library/bool.java:
mercury/java/library/builtin.java:
mercury/java/library/deconstruct.java:
mercury/java/library/enum.java:
mercury/java/library/integer.java:
mercury/java/library/io.java:
mercury/java/library/list.java:
mercury/java/library/map.java:
mercury/java/library/mer_int.java:
mercury/java/library/mr_char.java:
mercury/java/library/mr_float.java:
mercury/java/library/mr_int.java:
mercury/java/library/ops.java:
mercury/java/library/private_builtin.java:
mercury/java/library/require.java:
mercury/java/library/set.java:
mercury/java/library/std_util.java:
mercury/java/library/string.java:
mercury/java/library/term.java:
mercury/java/library/time.java:
mercury/java/library/tree234.java:
mercury/java/library/type_desc.java:
These are partial Java versions of mercury library modules. They are
very rough but will currently allow for most of the tests/benchmark
directory to run in Java.
