They turned out to have a zero hit rate, making them useless.
compiler/make.dependencies.m:
Add code to use the two new caches, indirect_imports_non_intermod
and anc0_dir1_indir2_non_intermod. I got statistics on their
performance while they were enabled, but since their hit rate was zero,
this diff includes them only in a commented-out form.
Note that adding the second cache required adding a new dep_spec,
which remains, since it shouldn't affect performance at all.
compiler/make.deps_cache.m:
Disable the those two caches.
Fix an issue where the original statistics-gathering code
mixed up hits and misses.
Include the statistics gathered in course of implementing this diff.
tools/make_deps_cache_stats:
Update this script to fix the hit/miss issue, and to print more info.
compiler/make.deps_cache.m:
Add conditionally-compiled code to count the search and addition
operations on each cache, as well as code to write out these counts.
Where a cache has two versions, one for intermod and non-intermod
operations, put the non-intermod version first, since it is more basic.
Add two new non-intermod cache versions that are not used yet,
but whose intermod versions are used: one for non-intermod
indirect imports, and one for non-intermod anc0_dir1_indir2.
For the latter, include "intermod" in the name of the old cache,
which uses intermodule information.
compiler/make.make_info.m:
Add those two caches, and follow the updated order and names of the caches.
compiler/mercury_compile_main.m:
Call make.deps_cache.m to dump out its cache, it it was enabled
and gathered any info.
compiler/make.m:
Make make.deps_cache.m visible from outside the make package,
in order to make possible the change top mercury_compile_main.m above.
compiler/make.dependencies.m:
Conform to the changes above.
tools/make_deps_cache_stats:
A new script to summarize the information recorded by the new code.
