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A first implementation of the inter-module analysis framwork.
Currently only unused argument analysis is supported.
The current inter-module analysis scheme using `.trans_opt' files
has some major limitations. The compilation dependencies introduced
by `.trans_opt' files are too complicated for Mmake without major
limitations on which modules can use the contents of which `.trans_opt'
files. Also, the `.trans_opt' file system only computes greatest fixpoints,
which is often too weak to find opportunities for optimization.
A better solution is to provide a library which manually handles
the dependencies introduced by inter-module analysis, and can deal with
the complications introduced by cyclic module dependencies.
TODO:
- support other analyses, e.g. termination, type specialization
- dependency tracking and invalidation after source modifications
- garbage collection of unused versions
- least fixpoint analyses
analysis/Mmakefile:
analysis/mer_analysis.m:
analysis/analysis.m:
analysis/analysis.file.m:
The analysis library.
analysis/README:
Description and design documentation.
Mmake.workspace:
Mmakefile:
compiler/Mmakefile:
tools/bootcheck:
Link the analysis library into mercury_compile.
compiler/hlds_module.m:
Store analysis information in the module_info.
compiler/options.m:
doc/user_guide.texi:
Add an option `--intermodule-analysis'.
compiler/mercury_compile.m:
Call the analysis library to write the gathered
information at the end of a compilation.
compiler/unused_args.m:
Call the analysis library to retrieve information
about imported procedures. This replaces code which
used the `.opt' files.
Change the names created for unused arguments procedures
to include the arguments removed, rather than a sequence
number. I think Zoltan is working on a change to name
mangling, so I haven't updated the demangler.
compiler/prog_util.m:
Generate the new predicate names for unused_args.m.
library/std_util.m:
Add a polymorphic version of unit, which is useful
for binding type variables.
compiler/modules.m:
scripts/Mmake.vars.in:
Clean up files created by the analysis framework
in `mmake realclean'.
util/mdemangle.c:
profiler/demangle.m:
Document the change in the name mangling of procedures with
unused arguments.
configure.in:
Check for state variables and fixes for some typeclass bugs.
tests/warnings/Mmakefile:
tests/warnings/unused_args_analysis.{m,exp}:
Test case.