Split `crate_def_map` into two methods

This change:

  - introduces `compute_crate_def_map` query and renames
    `CrateDefMap::crate_def_map_query` for consistency,

  - annotates `crate_def_map` as `salsa::transparent` and adds a
    top-level `crate_def_map` wrapper function around that starts the
    profiler and immediately calls into `compute_crate_def_map` query.

This allows us to better understand where we spent the time, in
particular, how much is spent in the recomputaiton and how much in
salsa.

Example output (where we don't actually re-compute anything, but the
query still takes a non-trivial amount of time):

```
  211ms - handle_inlay_hints
      150ms - get_inlay_hints
          150ms - SourceAnalyzer::new
               65ms - def_with_body_from_child_node
                   65ms - analyze_container
                       65ms - analyze_container
                           65ms - Module::from_definition
                               65ms - Module::from_file
                                   65ms - crate_def_map
                                        1ms - parse_macro_query (6 calls)
                                        0ms - raw_items_query (1 calls)
                                       64ms - ???
```

Signed-off-by: Michal Terepeta <[email protected]>

1 files changed, 5 insertions, 5 deletions

diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index f5ffd64fa..0af4a2868 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -1,11 +1,11 @@
 //! FIXME: write short doc here
 
 pub use hir_def::db::{
-    BodyQuery, BodyWithSourceMapQuery, ConstDataQuery, CrateDefMapQuery, CrateLangItemsQuery,
-    DefDatabase, DefDatabaseStorage, DocumentationQuery, EnumDataQuery, ExprScopesQuery,
-    FunctionDataQuery, GenericParamsQuery, ImplDataQuery, InternDatabase, InternDatabaseStorage,
-    LangItemQuery, ModuleLangItemsQuery, RawItemsQuery, StaticDataQuery, StructDataQuery,
-    TraitDataQuery, TypeAliasDataQuery,
+    BodyQuery, BodyWithSourceMapQuery, ComputeCrateDefMapQuery, ConstDataQuery,
+    CrateLangItemsQuery, DefDatabase, DefDatabaseStorage, DocumentationQuery, EnumDataQuery,
+    ExprScopesQuery, FunctionDataQuery, GenericParamsQuery, ImplDataQuery, InternDatabase,
+    InternDatabaseStorage, LangItemQuery, ModuleLangItemsQuery, RawItemsQuery, StaticDataQuery,
+    StructDataQuery, TraitDataQuery, TypeAliasDataQuery,
 };
 pub use hir_expand::db::{
     AstDatabase, AstDatabaseStorage, AstIdMapQuery, MacroArgQuery, MacroDefQuery, MacroExpandQuery,