Move the dataflow framework to its own crate.

compiler/rustc_mir_dataflow/src/lib.rs

@@ -0,0 +1,71 @@
+#![feature(associated_type_defaults)]
+#![feature(bool_to_option)]
+#![feature(box_patterns)]
+#![feature(box_syntax)]
+#![feature(const_panic)]
+#![feature(exact_size_is_empty)]
+#![feature(in_band_lifetimes)]
+#![feature(iter_zip)]
+#![feature(min_specialization)]
+#![feature(once_cell)]
+#![feature(stmt_expr_attributes)]
+#![feature(trusted_step)]
+
+#[macro_use]
+extern crate tracing;
+#[macro_use]
+extern crate rustc_middle;
+
+use rustc_ast::{self as ast, MetaItem};
+use rustc_middle::ty;
+use rustc_session::Session;
+use rustc_span::symbol::{sym, Symbol};
+
+pub use self::drop_flag_effects::{
+    drop_flag_effects_for_function_entry, drop_flag_effects_for_location,
+    move_path_children_matching, on_all_children_bits, on_all_drop_children_bits,
+    on_lookup_result_bits,
+};
+pub use self::framework::{
+    fmt, lattice, visit_results, Analysis, AnalysisDomain, Backward, Direction, Engine, Forward,
+    GenKill, GenKillAnalysis, JoinSemiLattice, Results, ResultsCursor, ResultsRefCursor,
+    ResultsVisitable, ResultsVisitor,
+};
+
+use self::move_paths::MoveData;
+
+pub mod drop_flag_effects;
+pub mod elaborate_drops;
+mod framework;
+pub mod impls;
+pub mod move_paths;
+pub mod rustc_peek;
+pub mod storage;
+
+pub(crate) mod indexes {
+    pub(crate) use super::move_paths::MovePathIndex;
+}
+
+pub struct MoveDataParamEnv<'tcx> {
+    pub move_data: MoveData<'tcx>,
+    pub param_env: ty::ParamEnv<'tcx>,
+}
+
+pub fn has_rustc_mir_with(
+    _sess: &Session,
+    attrs: &[ast::Attribute],
+    name: Symbol,
+) -> Option<MetaItem> {
+    for attr in attrs {
+        if attr.has_name(sym::rustc_mir) {
+            let items = attr.meta_item_list();
+            for item in items.iter().flat_map(|l| l.iter()) {
+                match item.meta_item() {
+                    Some(mi) if mi.has_name(name) => return Some(mi.clone()),
+                    _ => continue,
+                }
+            }
+        }
+    }
+    None
+}