Crate rustc_incremental

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Support for serializing the dep-graph and reloading it.

Modules§

assert_dep_graph 🔒: This pass is only used for the UNIT TESTS and DEBUGGING NEEDS around dependency graph construction. It serves two purposes; it will dump graphs in graphviz form to disk, and it searches for #[rustc_if_this_changed] and #[rustc_then_this_would_need] annotations. These annotations can be used to test whether paths exist in the graph. These checks run after codegen, so they view the the final state of the dependency graph. Note that there are similar assertions found in persist::dirty_clean which check the initial state of the dependency graph, just after it has been loaded from disk.
errors 🔒
persist 🔒: When in incremental mode, this pass dumps out the dependency graph into the given directory. At the same time, it also hashes the various HIR nodes.

LoadResult: Represents the result of an attempt to load incremental compilation data.

DEFAULT_LOCALE_RESOURCE: Raw content of Fluent resource for this crate, generated by fluent_messages macro, imported by rustc_driver to include all crates’ resources in one bundle.

copy_cgu_workproduct_to_incr_comp_cache_dir: Copies a CGU work product to the incremental compilation directory, so next compilation can find and reuse it.
finalize_session_directory: This function finalizes and thus ‘publishes’ the session directory by renaming it to s-{timestamp}-{svh} and releasing the file lock. If there have been compilation errors, however, this function will just delete the presumably invalid session directory.
in_incr_comp_dir: Returns the path for a given filename within the incremental compilation directory, not necessarily from the current session.
in_incr_comp_dir_sess: Returns the path for a given filename within the incremental compilation directory in the current session.
load_query_result_cache: Attempts to load the query result cache from disk
provide
save_work_product_index: Saves the work product index.
setup_dep_graph: Setups the dependency graph by loading an existing graph from disk and set up streaming of a new graph to an incremental session directory.