Commit Graph

19 Commits

Author SHA1 Message Date
Zoltan Somogyi
86f563a94d Pack subword-sized arguments next to a remote sectag.
compiler/du_type_layout.m:
    If the --allow-packing-remote-sectag option is set, then try to pack
    an initial subsequence of subword-sized arguments next to remote sectags.

    To allow the polymorphism transformation to put the type_infos and/or
    typeclass_infos it adds to a function symbol's argument list at the
    *front* of that argument list, pack arguments next to remote sectags
    only in function symbols that won't have any such extra arguments
    added to them.

    Do not write all new code for the new optimization; instead, generalize
    the code that already does a very similar job for packing args next to
    local sectags.

    Delete the code we used to have that picked the packed representation
    over the base unpacked representation only if it reduced the
    "rounded-to-even" number of words. A case could be made for its usefulness,
    but in the presence of the new optimization the extra code complexity
    it requires is not worth it (in my opinion).

    Extend the code that informs users about possible argument order
    rearrangements that yield better packing to take packing next to sectags
    into account.

compiler/hlds_data.m:
    Provide a representation for cons_tags that use the new optimization.
    Instead of adding a new cons_tag, we do this by replacing several old
    cons_tags that all represent pointers to memory cells with a single
    cons_tag named remote_args_tag with an argument that selects among
    the old cons_tags being replaced, and adding a new alternative inside
    this new type. The new alternative is remote_args_shared with a
    remote_sectag whose size is rsectag_subword(...).

    Instead of representing the value of the "data" field in classes
    on the Java and C# backends as a strange kind of secondary tag
    that is added to a memory cell by a class constructor instead of
    having to be explicitly added to the front of the argument vector
    by the code of a unification, represent it more directly as separate
    kind of remote_args_tag. Continuing to treat it as a sectag would have
    been very confusing to readers of the code of ml_unify_gen_*.m in the
    presence of the new optimization.

    Replacing several cons_tags that were usually treated similarly with
    one cons_tag simplifies many switches. Instead of an switch with that
    branches to the same switch arm for single_functor_tag, unshared_tag
    and shared_remote_tag, and then switches on these three tags again
    to get e.g. the primary tag of each, the new code of the switch arm
    is executed for just cons_tag value (remote_args_tag), and switches
    on the various kinds of remote args tags only when it needs to.
    In is also more natural to pass around the argument of remote_args_tag
    than to pass around a variable of type cons_tag that can be bound to only
    single_functor_tag, unshared_tag or shared_remote_tag.

    Add an XXX about possible further steps along these lines, such as
    making a new cons_tag named something like "user_const_tag" represent
    all user-visible constants.

compiler/unify_gen_construct.m:
compiler/unify_gen_deconstruct.m:
compiler/unify_gen_test.m:
compiler/unify_gen_util.m:
compiler/ml_unify_gen_construct.m:
compiler/ml_unify_gen_deconstruct.m:
compiler/ml_unify_gen_test.m:
compiler/ml_unify_gen_util.m:
    Implement X = f(Yi) unifications where f uses the new representation,
    i.e. some of its arguments are stored next to a remote sectag.

    Some of the Yi are stored in a tagword (a word that also contains a tag,
    in this case the remote secondary tag), while some are stored in other
    words in a memory cell. This means that such unifications have similarities
    both to unifications involving arguments being packed next to local
    sectags, and to unifications involving ordinary arguments in memory cells.
    Therefore wherever possible, their implemenation uses suitably generalized
    versions of existing code that did those two jobs for two separate kinds of
    cons_tags.

    Making such generalizations possible in some cases required shifting the
    boundary between predicates, moving work from a caller to a callee
    or vice versa.

    In unify_gen_deconstruct.m, stop using uni_vals to represent *either* a var
    *or* a word in a memory cell. While this enabled us to factor out some
    common code, the predicate boundaries it lead to are unsuitable for the
    generalizations we now need.

    Consistently use unsigned ints to represent both the whole and the parts
    of words containing packed arguments (and maybe sectags), except when
    comparing ptag constants with the result of applying the "tag" unop
    to a word, (since that unop returns an int, at least for now).

    In a few cases, avoid the recomputation of some information that we
    already know. The motivation is not efficiency, since the recomputation
    we avoid is usually cheap, but the simplification of the code's correctness
    argument.

    Use more consistent terminology in things such as variable names.

    Note the possibility of further future improvements in several places.

compiler/ml_foreign_proc_gen.m:
    Delete a long unused predicate.

compiler/mlds.m:
    Add an XXX documenting a possible improvement.

compiler/rtti.m:
    Update the compiler's internal representation of RTTI data structures
    to make them able to describe secondary tags that are smaller than
    a full word.

compiler/rtti_out.m:
    Conform to the changes above, and delete a long-unused predicate.

compiler/type_ctor_info.m:
    Use the RTTI's du_hl_rep to represent cons_tags that distinguish
    between function symbols using a field in a class.

compiler/ml_type_gen.m:
    Provide a specialized form of a function for code in ml_unify_gen_*.m.
    Conform to the changes above.

compiler/add_special_pred.m:
compiler/bytecode_gen.m:
compiler/export.m:
compiler/hlds_code_util.m:
compiler/lco.m:
compiler/ml_closure_gen.m:
compiler/ml_switch_gen.m:
compiler/ml_tag_switch.m:
compiler/rtti_to_mlds.m:
compiler/switch_util.m:
compiler/tag_switch.m:
    Conform to the changes above.

runtime/mercury_type_info.h:
    Update the runtime's representation of RTTI data structures to make them
    able to describe remote secondary tags that are smaller than a full word.

runtime/mercury_deconstruct.[ch]:
runtime/mercury_deconstruct.h:
runtime/mercury_deconstruct_macros.h:
runtime/mercury_ml_expand_body.h:
runtime/mercury_ml_arg_body.h:
runtime/mercury_ml_deconstruct_body.h:
runtime/mercury_ml_functor_body.h:
    These modules collectively implement the predicates in deconstruct.m
    in the library, and provide access to its functionality to other C code,
    e.g. in the debugger. Update these to be able to handle terms with the
    new data representation optimization.

    This update requires a significant change in the distribution of work
    between these files for the predicates deconstruct.deconstruct and
    deconstruct.limited_deconstruct. We used to have mercury_ml_expand_body.h
    fill in the fields of their expand_info structures (whose types are
    defined in mercury_deconstruct.h) with pointers to three vectors:
    (a) a vector of arg_locns with one element per argument, with a NULL
    pointer being equivalent to a vector with a given element in every slot;
    (b) a vector of type_infos with one element per argument, constructed
    dynamically (and later freed) if necessary; and (c) a vector of argument
    words. Once upon a time, before double-word and sub-word arguments,
    vector (c) also had one word per argument, but that hasn't been true
    for a while; we added vector (a) help the consumers of the expand_info
    decode the difference. The consumers of this info  always used these
    vectors to build up a Mercury term containing a list of univs,
    with one univ for each argument.

    This structure could be stretched to handle function symbols that store
    *all* their arguments in a tagword next to a local sectag, but I found
    that stretching it to cover function symbols that have *some* of their
    arguments packed next to a remote sectag and *some other* of their
    arguments in a memory cell as usual would have required a well-nigh
    incomprehensibly complex, and therefore almost undebuggable, interface
    between mercury_ml_expand_body.h and the other files above. This diff
    therefore changes the interface to have mercury_ml_expand_body.h
    build the list of univs directly. This make its code relatively simple
    and self-contained, and it should be somewhat faster then the old code
    as well, since it never needs to allocate, fill in and then free
    vectors of type_infos (each such typeinfo now gets put into a univ
    as soon as it is constructed). The downside is that if we ever wanted
    to get all the arguments at once for a purpose other than constructing
    a list of univs from them, it would nevertheless require constructing
    that list of univs anyway as an intermediate data structure. I don't see
    this downside is significant, because (a) I don't think such a use case
    is very likely, and (b) even if one arises, debuggable but a bit slow
    is probably preferable to faster but very hard to debug.

    Reduce the level of indentation of some of these files to make the code
    easier to edit. Do this by

    - not adding an indent level from switch statements to their cases; and
    - not adding an indent level when a case in a switch has a local block.

    Move the break or return ending a case inside that case's block,
    if it has one.

runtime/mercury_deep_copy_body.h:
runtime/mercury_table_type_body.h:
    Update these to enable the copying or tabling of terms whose
    representations uses the new optimization.

    Use the techniques listed above to reduce the level of indentation
    make the code easier to edit.

runtime/mercury_tabling.c:
runtime/mercury_term_size.c:
    Conform to the changes above.

runtime/mercury_unify_compare_body.h:
    Make this code compile after the changes above. It does need to work
    correctly, since we only ever used this code to compare the speed
    of unify-by-rtti with the speed of unify-by-compiler-generated-code,
    and in real life, we always use the latter. (It hasn't been updated
    to work right with previous arg packing changes either.)

library/construct.m:
    Update to enable the code to construct terms whose representations
    uses the new optimization.

    Add some sanity checks.

library/private_builtin.m:
runtime/mercury_dotnet.cs.in:
java/runtime/Sectag_Locn.java:
    Update the list of possible sectag kinds.

library/store.m:
    Conform to the changes above.

trace/mercury_trace_vars.c:
    Conform to the changes above.

tests/hard_coded/deconstruct_arg.{m,exp,exp2}:
    Extend this test to test the deconstruction of terms whose
    representations uses the new optimization.

    Modify some of the existing terms being tested to make them more diverse,
    in order to make the output easier to navigate.

tests/hard_coded/construct_packed.{m,exp}:
    A new test case to test the construction of terms whose
    representations uses the new optimization.

tests/debugger/browse_packed.{m,exp}:
    A new test case to test access to the fields of terms whose
    representations uses the new optimization.

tests/tabling/test_packed.{m,exp}:
    A new test case to test the tabling of terms whose
    representations uses the new optimization.

tests/debugger/Mmakefile:
tests/hard_coded/Mmakefile:
tests/tabling/Mmakefile:
    Enable the new test cases.
2018-08-30 05:14:38 +10:00
Zoltan Somogyi
1b43d32cf9 Make a test case output more readable.
tests/hard_coded/deconstruct_arg.m:
    The (bigger) expected output file of this test was 826 lines,
    much of which was very repetitive. This made its correctness hard
    to assess. Fix this by

    - printing the term being tested just once;

    - printing the results of individual argument access tests only they
      succeed, printing only a single summary line for all the argument
      access tests that did not succeed;

    - omitting even the summary line for tests on constants, for which
      having them all fail is the natural expectation;

    - likewise, not printing anything for the full deconstruct tests
      on constants if their output is exactly one would expect from
      just the functor access test.

    Also, print the results of the limited and unlimited deconstruct tests
    using the same formatting, to make it easy to see whether they are
    the same.

    Document the reason for the existence of the .exp2 file.

tests/hard_coded/deconstruct_arg.{exp,exp2}:
    Update both expected output files.
2018-08-14 02:48:49 +10:00
Julien Fischer
92802b9ad7 Fix a typo in MR_escape_string_quote.
runtime/mercury_string.c:
    s/b/v/ in a spot.

tests/hard_coded/deconstruct_arg.exp:
tests/hard_coded/deconstruct_arg.exp2:
    Conform to the above change.
2018-07-29 12:42:30 +00:00
Julien Fischer
4455d3601e Escape characters in strings returned by deconstruct.functor/4.
runtime/mercury_string.[ch]:
    Add a function that returns a copy of a string inside double
    quotes and with escapes for any control characters inserted.

    Add macro that tests if a character is a control character.

runtime/mercury_ml_expand_body.h:
    Use the above function to escape characters in the representation
    of string functors.

library/rtti_implementation.m:
    Do the same for the C# and Java backends.

library/term_io.m:
    Update a comment.

NEWS:
    Announce the above change to deconstruct.functor/4, as well
    the earlier change to its handling of characters.

tests/hard_coded/deconstruct_arg.m:
tests/hard_coded/deconstruct_arg.exp:
    Extend this test case to cover strings.
2018-07-11 01:42:33 +10:00
Julien Fischer
a00e86be35 Escape all control characters in io.write, deconstruct.functor etc.
The above predicates currently escape all of the C0 control characters (+
Delete).  This change modifies them to escape all of the characters in the
Unicode category `Other,control' using backslash escapes when they exist and
octal escapes otherwise.

library/term_io.m:
    Do not treat C1 control characters as Mercury source characters.

    Re-order the list of Mercury punctuation characters by codepoint
    order; it is difficult to check for completion otherwise.

    Put a list of special characters escapes in order.

runtime/mercury_ml_expand_body.h:
library/rtti_implementation.m:
   Update the implementations of functor/4 to escape all control
   characters when returning the functor of a character.

library/deconstruct.m:
    Specify that functor/4 should escape all control characters in
    the value returned for characters and strings.  (XXX TODO: it
    currently doesn't implement the new behaviour for strings; I'll
    add that separately.)

library/io.m:
library/stream.string_writer.m:
    Similar to the above but for io.write etc.

tests/hard_coded/write.{m,exp}:
tests/hard_coded/deconstruct_arg.{m,exp,exp2}:
   Extend these tests to cover the block of C1 control characters
   and the boundaries around it.
2018-06-19 17:08:20 +10:00
Julien Fischer
422c598b3c Update a test case.
tests/hard_coded/deconstruct_arg.m:
   Use io.write_line/3 throughout this test, rather than following every call
   to io.write/3 with call to newline/2.

   Extend the test slightly.

test/s/hard_coded/deconstruct_arg.exp*:
   Conform to the above changes.
2018-06-14 22:03:17 +10:00
Julien Fischer
58f5168b5f Fixes for deconstruct.functor and io.write.
Fix two problems with deconstruct.functor/4 and characters.

1. Control characters were not being octal escaped as they are by
   io.write etc.

2. The higher bytes of multibyte characters were being discarded.

Note that as part of the above fix deconstruct.functor/4 will now abort if
called with a surrogate code point.

Fix problem with io.write (and related predicates) where characters were
being octal escaped even though a more specific escape character existed
(e.g. \r or \a).

runtime/mercury_ml_expand_body.h:
    Make the above fixes.

library/rtti_implementation.m:
    Conform to the above.

    Fix the escaping of single quote characters.

library/term_io.m:
    Add missing character escapes to the predicate
    mercury_escape_special_char/2.  The omission of these
    was the cause of the above problem with character escapes
    and io.write.

tests/hard_coded/deconstruct_arg.{m,exp,exp2}:
    Modify this test to use io.write rather than io.print since
    the former will insert character escapes.

    Do more thorough testing of characters.

tests/hard_coded/write.{m,exp}:
    Add more tests for escape characters.

    Add tests for infinite float values.
2018-06-14 21:25:44 +10:00
Zoltan Somogyi
caa5c02535 Update a test's expected output after recent changes.
tests/hard_coded/deconstruct_arg.exp2:
    Update this file after recent changes.

tests/hard_coded/deconstruct_arg.m:
    Simplify the code of the test itself.
2018-06-12 13:31:07 +02:00
Julien Fischer
69912db031 Update a test case to cover 64-bit integers.
tests/hard_coded/deconstruct_arg.m:
tests/hard_coded/deconstruct_arg.exp*:
     As above.
2018-02-04 08:39:27 -05:00
Julien Fischer
32670e1536 Extend hard_coded/deconstruct_arg to cover fixed size integers.
tests/hard_coded/deconstruct_arg.m:
tests/hard_coded/deconstruct_arg.exp*:
     As above.
2017-09-11 01:36:27 -04:00
Julien Fischer
bfc5e2ed2f Fix term deconstruction for uints.
runtime/mercury_ml_expand_body.h:
library/rtti_implementation.m:
library/erlang_rtti_implementation.m:
    As above.

tests/hard_coded/deconstruct_arg.m:
     Add a test for uints.

     Avoid the use of a deprecated predicate.

tests/hard_coded/deconstruct_arg.{exp,exp2}:
     Update expected outputs for the above.
2017-06-18 21:16:46 +10:00
Peter Wang
b86f973fa9 Allow the use of Mercury abstract machine float registers for passing
Branches: main

Allow the use of Mercury abstract machine float registers for passing
double-precision float arguments in higher order calls.

In of itself this is not so useful for typical Mercury code.  However, as
all non-local procedures are potentially the targets of higher order calls,
without this change first order calls to non-local procedures could not use
float registers either.  That is the actual motivation for this change.

The basic mechanism is straightforward.  As before, do_call_closure_* is
invoked to place the closure's hidden arguments into r1, ..., rN, and extra
input arguments shifted into rN+1, etc.  With float registers, extra input
arguments may also be in f1, f2, etc. and the closure may also have hidden
float arguments.  Optimising for calls, we order the closure's hidden
arguments so that all float register arguments come after all regular
register arguments in the vector.  Having the arguments out of order does
complicate code which needs to deconstruct closures, but that is not so
important.

Polymorphism complicates things.  A closure with type pred(float) may be
passed to a procedure expecting pred(T).  Due to the `float' argument type,
the closure expects its argument in a float register.  But when passed to the
procedure, the polymorphic argument type means it would be called with the
argument in a regular register.

Higher-order insts already contain information about the calling convention,
without which a higher-order term cannot be called.  We extend higher-order
insts to include information about the register class required for each
argument.  For example, we can distinguish between:

	pred(in) is semidet /* arg regs: [reg_f] */
and
	pred(in) is semidet /* arg regs: [reg_r] */

Using this information, we can create a wrapper around a higher-order
variable if it appears in a context requiring a different calling convention.
We do this in a new HLDS pass, called float_regs.m.

Note: Mercury code has a tendency to lose insts for higher-order terms, then
"recover" them by hacky means.  The float_regs pass depends on higher-order
insts; it is impossible to create a wrapper for a procedure without knowing
how to call it.  The float_regs pass will report errors which we otherwise
accepted, due to higher-order insts being unavailable.  It should be possible
for the user to adjust the code to satisfy the pass, though the user may not
understand why it should be necessary.  In most cases, it probably really
*is* unnecessary.  We may be able to make the float_regs pass more tolerant
of missing higher-order insts in the future.

Class method calls do not use float registers because I didn't want to deal
with them yet.


compiler/options.m:
compiler/handle_options.m:
	Always enable float registers in low-level C grades when floats are
	wider than a word.

compiler/make_hlds_passes.m:
	Always allow double word floats to be stored unboxed in cells on C
	grades.

compiler/hlds_goal.m:
	Add an extra field to `generic_call' which gives the register class
	to use for each argument.  This is set by the float_regs pass.

compiler/prog_data.m:
	Add an extra field to `pred_inst_info' which records the register class
	to use for each argument.  This is set by the float_regs pass.

compiler/hlds_pred.m:
	Add a field to `proc_sub_info' which lists the headvars which must be
	passed via regular registers despite their types.

	Add a field to `pred_sub_info' to record the original unsubstituted
	argument types for instance method predicates.

compiler/check_typeclass.m:
	In the pred_info of an instance method predicate, record the original
	argument types before substituting the type variables for the instance.

compiler/float_regs.m:
compiler/transform_hlds.m:
	Add the new HLDS pass.

compiler/mercury_compile_middle_passes.m:
	Run the new pass if float registers are enabled.

compiler/lambda.m:
	Export the predicate to produce a predicate from a lambda.
	This is reused by float_regs.m to create wrapper closures.

	Add an argument to `expand_lambda' to set the reg_r_headvars field on
	the newly created procedure.

	Delete some unused fields from `lambda_info'.

compiler/arg_info.m:
	Make `generate_proc_arg_info' no longer always use regular registers
	for calls to exported procedures.  Do always use regular registers for
	class methods calls.

	Add a version of `make_arg_infos' which takes an explicit list of
	argument registers.  Rename the previous version.

	Add `generic_call_arg_reg_types' to return the argument registers
	for a generic call.

	Add a version of `compute_in_and_out_vars' which additionally separates
	arguments for float and regular registers.

compiler/call_gen.m:
	Use float registers for argument passing in higher-order calls, as
	directed by the new field in `generic_call'.

compiler/code_util.m:
	Add a function to encode the number of regular and float register
	arguments when making a higher-order call.

compiler/llds.m:
	Say that the `do_call_closure_N' functions only work for zero float
	register arguments.

compiler/follow_vars.m:
compiler/interval.m:
	Account for the use of float registers by generic call goals in these
	passes.

compiler/unify_gen.m:
	Move float register arguments to the end of a closure's hidden
	arguments vector, after regular register arguments.

	Count hidden regular and float register arguments separately, but
	encode them in the same word in the closure.  This is preferable to
	using two words because it reduces the differences between grades
	with and without float registers present.

	Disable generating code which creates a closure from an existing
	closure, if float registers exist.  That code does not understand the
	reordered hidden arguments vector yet.

compiler/continuation_info.m:
	Replace an argument's type_info in the closure layout if the argument
	is a float *and* is passed via a regular register, when floats are
	normally passed via float registers.  Instead, give it the type_info
	for `private_builtin.float_box'.

compiler/builtin_lib_types.m:
	Add function to return the type of `private_builtin.float_box/0'.

compiler/hlds_out_goal.m:
compiler/hlds_out_pred.m:
compiler/mercury_to_mercury.m:
	Dump the new fields added to `generic_call', `pred_inst_info' and
	`proc_sub_info'.

compiler/prog_type.m:
	Add helper predicate.

compiler/*.m:
	Conform to changes.

library/private_builtin.m:
	Add a type `float_box'.

runtime/mercury_ho_call.h:
	Describe the modified closure representation.

	Rename the field which counts the number of hidden arguments to prevent
	it being used incorrectly, as it now encodes two numbers (potentially).

	Add macros to unpack the encoded field.

runtime/mercury_ho_call.c:
	Update the description of how higher-order calls work.

	Update code which extracts closure arguments to take account the
	arguments being reordered in the hidden arguments vector.

runtime/mercury_deep_copy.c:
runtime/mercury_deep_copy_body.h:
runtime/mercury_layout_util.c:
runtime/mercury_ml_expand_body.h:
	Update code which extracts closure arguments to take account the
	arguments being reordered in the hidden arguments vector.

runtime/mercury_type_info.c:
runtime/mercury_type_info.h:
	Add helper function.

tools/make_spec_ho_call:
	Update the generated do_call_closure_* functions to place float
	register arguments.

tests/hard_coded/Mercury.options:
tests/hard_coded/Mmakefile:
tests/hard_coded/ho_float_reg.exp:
tests/hard_coded/ho_float_reg.m:
	Add new test case.

tests/hard_coded/copy_pred.exp:
tests/hard_coded/copy_pred.m:
tests/hard_coded/deconstruct_arg.exp:
tests/hard_coded/deconstruct_arg.exp2:
tests/hard_coded/deconstruct_arg.m:
	Extend test cases with float arguments in closures.

tests/debugger/higher_order.exp2:
	Add alternative output, changed due to closure wrapping.

tests/hard_coded/ho_univ_to_type.m:
	Adjust test case so that the float_regs pass does not report errors
	about missing higher-order insts.

compiler/notes/compiler_design.html:
	Describe the new module.

	Delete a duplicated paragraph.

compiler/notes/todo.html:
TODO:
	Delete one hundred billion year old todos.
2012-02-13 00:11:57 +00:00
Peter Wang
0ae65de577 Pack consecutive enumeration arguments in discriminated union types into a
Branches: main

Pack consecutive enumeration arguments in discriminated union types into a
single word to reduce cell sizes.  Argument packing is only enabled on C
back-ends with low-level data, and reordering arguments to improve
opportunities for packing is not yet attempted.  The RTTI implementations for
other back-ends will need to be updated, but that is best left until after any
argument reordering change.

Modules which import abstract enumeration types are notified so by writing
declarations of the form:

	:- type foo where type_is_abstract_enum(NumBits).

into the interface file for the module which defines the type.


compiler/prog_data.m:
	Add an `arg_width' argument to constructor arguments.

	Replace `is_solver_type' by `abstract_type_details', with an extra
	option for abstract exported enumeration types.

compiler/handle_options.m:
compiler/options.m:
	Add an internal option `--allow-argument-packing'.

compiler/make_hlds_passes.m:
	Determine whether and how to pack enumeration arguments, updating the
	`arg_width' fields of constructor arguments before constructors are
	added to the HLDS.

compiler/mercury_to_mercury.m:
compiler/modules.m:
	Write `where type_is_abstract_enum(NumBits)' to interface files
	for abstract exported enumeration types.

compiler/prog_io_type_defn.m:
	Parse `where type_is_abstract_enum(NumBits)' attributes on type
	definitions.

compiler/arg_pack.m:
compiler/backend_libs.m:
	Add a new module.  This mainly contains a predicate which packs rvals
	according to arg_widths, which is used by both LLDS and MLDS back-ends.

compiler/ml_unify_gen.m:
compiler/unify_gen.m:
	Take argument packing into account when generating code for
	constructions and deconstructions.  Only a relatively small part of the
	compiler actually needs to understand argument packing.  The rest works
	at the HLDS level with constructor arguments and variables, or at the
	LLDS and MLDS levels with structure fields.

compiler/code_info.m:
compiler/var_locn.m:
	Add assign_field_lval_expr_to_var and
	var_locn_assign_field_lval_expr_to_var.

	Allow more kinds of rvals in assign_cell_arg.  I do not know why it was
	previously restricted, except that the other kinds of rvals were not
	encountered as cell arguments before.

compiler/mlds.m:
	We can now rely on the compiler to pack arguments in the
	mlds_decl_flags type instead of doing it manually.  A slight downside
	is that though the type is packed down to a single word cell, it will
	still incur a memory allocation per cell.  However, I did not notice
	any difference in compiler speed.

compiler/rtti.m:
compiler/rtti_out.m:
	Add and output a new field for MR_DuFunctorDesc instances, which, if
	any arguments are packed, points to an array of MR_DuArgLocn.  Each
	array element describes the offset in the cell at which the argument's
	value is held, and which bits of the word it occupies.  In the more
	common case where no arguments are packed, the new field is simply
	null.

compiler/rtti_to_mlds.m:
	Generate the new field to MR_DuFunctorDesc.

compiler/structure_reuse.direct.choose_reuse.m:
	For now, prevent structure reuse reusing a dead cell which has a
	different constructor to the new cell.  The code to determine whether a
	dead cell will hold the arguments of a new cell with a different
	constructor will need to be updated to account for argument packing.

compiler/type_ctor_info.m:
	Bump RTTI version number.

	Conform to changes.

compiler/add_type.m:
compiler/check_typeclass.m:
compiler/equiv_type.m:
compiler/equiv_type_hlds.m:
compiler/erl_rtti.m:
compiler/hlds_data.m:
compiler/hlds_out_module.m:
compiler/intermod.m:
compiler/make_tags.m:
compiler/mlds_to_gcc.m:
compiler/opt_debug.m:
compiler/prog_type.m:
compiler/recompilation.check.m:
compiler/recompilation.version.m:
compiler/special_pred.m:
compiler/type_constraints.m:
compiler/type_util.m:
compiler/unify_proc.m:
compiler/xml_documentation.m:
	Conform to changes.

	Reduce code duplication in classify_type_defn.

compiler/hlds_goal.m:
	Clarify a comment.

library/construct.m:
	Make `construct' pack arguments when necessary.

	Remove an old RTTI version number check as recommended in
	mercury_grade.h.

library/store.m:
	Deal with packed arguments in this module.

runtime/mercury_grade.h:
	Bump binary compatibility version number.

runtime/mercury_type_info.c:
runtime/mercury_type_info.h:
	Bump RTTI version number.

	Add MR_DuArgLocn structure definition.

	Add a macro to unpack an argument as described by MR_DuArgLocn.

	Add a function to determine a cell's size, since the number of
	arguments is no longer correct.

runtime/mercury_deconstruct.c:
runtime/mercury_deconstruct.h:
runtime/mercury_deconstruct_macros.h:
runtime/mercury_ml_arg_body.h:
runtime/mercury_ml_expand_body.h:
	Deal with packed arguments when deconstructing.

	Remove an old RTTI version number check as recommended in
	mercury_grade.h.

runtime/mercury_deep_copy_body.h:
	Deal with packed arguments when copying.

runtime/mercury_table_type_body.h:
	Deal with packed arguments in tabling.

runtime/mercury_dotnet.cs.in:
	Add DuArgLocn field to DuFunctorDesc. Argument packing is not enabled
	for the C# back-end yet so this is unused.

trace/mercury_trace_vars.c:
	Deal with packed arguments in MR_select_specified_subterm,
	use for the `hold' command.

java/runtime/DuArgLocn.java:
java/runtime/DuFunctorDesc.java:
	Add DuArgLocn field to DuFunctorDesc. Argument packing is not enabled
	for the Java back-end yet so this is unused.

extras/trailed_update/tr_store.m:
	Deal with packed arguments in this module (untested).

extras/trailed_update/samples/interpreter.m:
extras/trailed_update/tr_array.m:
	Conform to argument reordering in the array, map and other modules in
	previous changes.

tests/hard_coded/Mercury.options:
tests/hard_coded/Mmakefile:
tests/hard_coded/lco_pack_args.exp:
tests/hard_coded/lco_pack_args.m:
tests/hard_coded/pack_args.exp:
tests/hard_coded/pack_args.m:
tests/hard_coded/pack_args_copy.exp:
tests/hard_coded/pack_args_copy.m:
tests/hard_coded/pack_args_intermod1.exp:
tests/hard_coded/pack_args_intermod1.m:
tests/hard_coded/pack_args_intermod2.m:
tests/hard_coded/pack_args_reuse.exp:
tests/hard_coded/pack_args_reuse.m:
tests/hard_coded/store_ref.exp:
tests/hard_coded/store_ref.m:
tests/invalid/Mmakefile:
tests/invalid/where_abstract_enum.err_exp:
tests/invalid/where_abstract_enum.m:
tests/tabling/Mmakefile:
tests/tabling/pack_args_memo.exp:
tests/tabling/pack_args_memo.m:
	Add new test cases.

tests/hard_coded/deconstruct_arg.exp:
tests/hard_coded/deconstruct_arg.exp2:
tests/hard_coded/deconstruct_arg.m:
	Add constructors with packed arguments to these cases.

tests/invalid/where_direct_arg.err_exp:
	Update expected output.
2011-07-05 03:34:39 +00:00
Peter Wang
0afad5bba9 Implement deconstruct.named_arg* and deconstruct.functor_number*
Branches: main, 10.04

library/deconstruct.m:
library/rtti_implementation.m:
        Implement deconstruct.named_arg* and deconstruct.functor_number*
        predicates for Java backend.

        Reformat some of the code.

tests/hard_coded/deconstruct_arg.m:
tests/hard_coded/deconstruct_arg.exp:
tests/hard_coded/deconstruct_arg.exp2:
        Extend this test case to test named_arg_cc.
2010-07-02 02:35:07 +00:00
Julien Fischer
1092a9e37f Fix failing test cases in hlc grades.
Estimated hours taken: 0.1
Branches: main

Fix failing test cases in hlc grades.

tests/hard_coded/deconstruct_arg.exp2:
tests/hard_coded/write_reg1.exp3:
tests/hard_coded/write_xml.exp2:
	Conform to the new way in which floats are printed.
2007-02-22 05:35:31 +00:00
Zoltan Somogyi
ef55b420fd Remove from std_util.m the predicates that merely call predicates in
Estimated hours taken: 12
Branches: main

Remove from std_util.m the predicates that merely call predicates in
the type_desc, construct and deconstruct modules, to reduce clutter
in std_util.m.

library/std_util.m:
	Remove those predicates from std_util.m.

library/deconstruct.m:
	Add a type we need that was previously defined in std_util.m.

library/construct.m:
	Delete some module qualifications that have now become unnecessary,

browser/browse.m:
browser/browser_info.m:
browser/declarative_tree.m:
browser/dl.m:
browser/help.m:
browser/sized_pretty.m:
browser/term_rep.m:
compiler/bytecode_gen.m:
compiler/llds_out.m:
compiler/mlds_to_il.m:
compiler/mlds_to_managed.m:
library/assoc_list.m:
library/hash_table.m:
library/io.m:
library/pprint.m:
library/private_builtin.m:
library/prolog.m:
library/require.m:
library/rtti_implementation.m:
library/store.m:
library/term.m:
library/term_to_xml.m:
library/version_hash_table.m:
mdbcomp/program_representation.m:
	Import type_desc.m, construct.m and/or deconstruct.m to provide
	definitions of functions or predicates that up till now were in
	std_util.m. Modify the calls if the called function or predicate
	had a slightly different interface in std_util.m.

	Also, convert term_to_xml.m to four-space indentation, and delete
	unnecessary module qualifications in term.m.

tests/debugger/polymorphic_output.{m,inp,exp,exp2}:
tests/hard_coded/copy_pred_2.m:
tests/hard_coded/deconstruct_arg.exp:
tests/hard_coded/deconstruct_arg.exp2:
tests/hard_coded/deconstruct_arg.m:
tests/hard_coded/elim_special_pred.m:
tests/hard_coded/existential_bound_tvar.m:
tests/hard_coded/expand.m:
tests/hard_coded/foreign_type2.m:
tests/hard_coded/higher_order_type_manip.m:
tests/hard_coded/nullary_ho_func.m:
tests/hard_coded/tuple_test.m:
tests/hard_coded/type_ctor_desc.m:
tests/hard_coded/type_qual.m:
tests/hard_coded/write_xml.m:
tests/hard_coded/sub-modules/class.m:
tests/hard_coded/sub-modules/nested.m:
tests/hard_coded/sub-modules/nested2.m:
tests/hard_coded/sub-modules/nested3.m:
tests/hard_coded/sub-modules/parent.m:
tests/hard_coded/sub-modules/parent2.child.m:
tests/hard_coded/typeclasses/existential_rtti.m:
tests/recompilation/type_qual_re.m.1:
cvs update: Updating tests/submodules
cvs update: Updating tests/tabling
cvs update: Updating tests/term
cvs update: Updating tests/tools
cvs update: Updating tests/trailing
cvs update: Updating tests/typeclasses
cvs update: Updating tests/valid
tests/valid/agc_unbound_typevars.m:
tests/valid/agc_unbound_typevars2.m:
tests/valid/agc_unused_in.m:
	Replace references to the deleted predicates in std_util with
	references to the equivalent predicates in type_desc, construct
	and/or deconstruct. In test cases that already tested both the
	functionality in std_util and in the other modules, simply delete
	the part exercising std_util.
2006-03-22 02:56:44 +00:00
Ralph Becket
a8ffd3680c Change the compiler and tools so that .' and not :' is now used as the
Estimated hours taken: 14
Branches: main

Change the compiler and tools so that `.' and not `:' is now used as the
module separator in all output.

Infix `.' now has associativity yfx and priority 10.

NEWS:
	Report the change.

configure.in:
	Amend the test for an up-to-date Mercury compiler to check whether
	it recognises `.' as a module qualifier.

compiler/code_gen.m:
compiler/error_util.m:
compiler/hlds_out.m:
compiler/prog_out.m:
compiler/prog_util.m:
compiler/rl_exprn.m:
compiler/rl_gen.m:
compiler/source_file_map.m:
compiler/unused_args.m:
library/io.m:
library/rtti_implementation.m:
library/type_desc.m:
runtime/mercury_debug.c:
runtime/mercury_deconstruct.c:
runtime/mercury_stack_trace.c:
	Change `:' to `.' as module separator for output.

compiler/mercury_to_mercury.m:
compiler/prog_io_typeclass.m:
	As above.
	Fixed a bug where `.' was not being recognised as a module separator.

doc/reference_manual.texi:
	Report the change.

library/term_io.m:
	Ensure that infix `.' is written without surrounding spaces.

tests/hard_coded/dot_separator.m:
tests/hard_coded/dot_separator.exp:
tests/hard_coded/Mmakefile:
	Test case added.
2003-01-17 05:57:20 +00:00
Peter Ross
4e9e65503b Fix a bug where we weren't outputting floats to enough precision when
Estimated hours taken: 1
Branches: main

Fix a bug where we weren't outputting floats to enough precision when
deconstructing them.

runtime/mercury_ml_expand_body.h:
	Use MR_sprintf_float to determine the representation of the
	deconstructed float.

library/string.m:
library/io.m:
runtime/mercury_float.c:
runtime/mercury_float.h:
	Move ML_sprintf_float to mercury_float.h.

tests/hard_coded/deconstruct_arg.exp:
tests/hard_coded/deconstruct_arg.exp2:
tests/hard_coded/deconstruct_arg.m:
	Adapt the test case to test floats which require 17 digits of
	precision.
2002-11-29 13:26:01 +00:00
Zoltan Somogyi
6cd535b1f3 Fix a bug: closures do not contain valid layout information in hlc grades,
Estimated hours taken: 2
Branches: main

Fix a bug: closures do not contain valid layout information in hlc grades,
so in those grades closures cannot be deconstructed.

runtime/mercury_ml_expand_body.h:
	Do not deconstruct closures in hlc grades.

library/deconstruct.m:
	Document this behavior.

tests/hard_coded/deconstruct_arg.exp2:
	Add a second expected output file with the output appropriate for hlc
	grades.
2002-02-26 02:36:49 +00:00