Move `dominators` from Body to BasicBlocks

compiler/rustc_borrowck/src/invalidation.rs

@@ -26,7 +26,7 @@ pub(super) fn generate_invalidates<'tcx>(
 
     if let Some(all_facts) = all_facts {
         let _prof_timer = tcx.prof.generic_activity("polonius_fact_generation");
-        let dominators = body.dominators();
+        let dominators = body.basic_blocks.dominators();
         let mut ig = InvalidationGenerator {
             all_facts,
             borrow_set,

compiler/rustc_borrowck/src/lib.rs

@@ -334,7 +334,7 @@ fn do_mir_borrowck<'a, 'tcx>(
         };
     }
 
-    let dominators = body.dominators();
+    let dominators = body.basic_blocks.dominators();
 
     let mut mbcx = MirBorrowckCtxt {
         infcx,

compiler/rustc_codegen_ssa/src/mir/analyze.rs

@@ -15,7 +15,7 @@ pub fn non_ssa_locals<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
     fx: &FunctionCx<'a, 'tcx, Bx>,
 ) -> BitSet<mir::Local> {
     let mir = fx.mir;
-    let dominators = mir.dominators();
+    let dominators = mir.basic_blocks.dominators();
     let locals = mir
         .local_decls
         .iter()

compiler/rustc_middle/src/mir/basic_blocks.rs

@@ -5,6 +5,7 @@ use crate::mir::traversal::PostorderCache;
 use crate::mir::{BasicBlock, BasicBlockData, Successors, START_BLOCK};
 
 use rustc_data_structures::graph;
+use rustc_data_structures::graph::dominators::{dominators, Dominators};
 use rustc_index::vec::IndexVec;
 
 #[derive(Clone, TyEncodable, TyDecodable, Debug, HashStable, TypeFoldable, TypeVisitable)]
@@ -34,6 +35,11 @@ impl<'tcx> BasicBlocks<'tcx> {
         self.is_cyclic.is_cyclic(self)
     }
 
+    #[inline]
+    pub fn dominators(&self) -> Dominators<BasicBlock> {
+        dominators(&self)
+    }
+
     /// Returns predecessors for each basic block.
     #[inline]
     pub fn predecessors(&self) -> &Predecessors {

compiler/rustc_middle/src/mir/mod.rs

@@ -26,7 +26,7 @@ use rustc_target::abi::{Size, VariantIdx};
 use polonius_engine::Atom;
 pub use rustc_ast::Mutability;
 use rustc_data_structures::fx::FxHashSet;
-use rustc_data_structures::graph::dominators::{dominators, Dominators};
+use rustc_data_structures::graph::dominators::Dominators;
 use rustc_index::bit_set::BitMatrix;
 use rustc_index::vec::{Idx, IndexVec};
 use rustc_serialize::{Decodable, Encodable};
@@ -447,11 +447,6 @@ impl<'tcx> Body<'tcx> {
             .unwrap_or_else(|| Either::Right(block_data.terminator()))
     }
 
-    #[inline]
-    pub fn dominators(&self) -> Dominators<BasicBlock> {
-        dominators(&self.basic_blocks)
-    }
-
     #[inline]
     pub fn yield_ty(&self) -> Option<Ty<'tcx>> {
         self.generator.as_ref().and_then(|generator| generator.yield_ty)