Revert spurious changes.

Author: cjgillot

compiler/rustc_const_eval/src/transform/validate.rs

@@ -155,7 +155,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
         if self.unwind_edge_count <= 1 {
             return;
         }
-        let dom_tree = self.body.basic_blocks.dominators();
+        let doms = self.body.basic_blocks.dominators();
         let mut post_contract_node = FxHashMap::default();
         // Reusing the allocation across invocations of the closure
         let mut dom_path = vec![];
@@ -164,7 +164,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 if let Some(root) = post_contract_node.get(&bb) {
                     break *root;
                 }
-                let parent = dom_tree.immediate_dominator(bb).unwrap();
+                let parent = doms.immediate_dominator(bb).unwrap();
                 dom_path.push(bb);
                 if !self.body.basic_blocks[parent].is_cleanup {
                     break bb;

compiler/rustc_data_structures/src/graph/dominators/tests.rs

@@ -6,8 +6,8 @@ use super::super::tests::TestGraph;
 fn diamond() {
     let graph = TestGraph::new(0, &[(0, 1), (0, 2), (1, 3), (2, 3)]);
 
-    let tree = dominators(&graph);
-    let immediate_dominators = &tree.immediate_dominators;
+    let dominators = dominators(&graph);
+    let immediate_dominators = &dominators.immediate_dominators;
     assert_eq!(immediate_dominators[0], None);
     assert_eq!(immediate_dominators[1], Some(0));
     assert_eq!(immediate_dominators[2], Some(0));
@@ -22,8 +22,8 @@ fn paper() {
         &[(6, 5), (6, 4), (5, 1), (4, 2), (4, 3), (1, 2), (2, 3), (3, 2), (2, 1)],
     );
 
-    let dom_tree = dominators(&graph);
-    let immediate_dominators = &dom_tree.immediate_dominators;
+    let dominators = dominators(&graph);
+    let immediate_dominators = &dominators.immediate_dominators;
     assert_eq!(immediate_dominators[0], None); // <-- note that 0 is not in graph
     assert_eq!(immediate_dominators[1], Some(6));
     assert_eq!(immediate_dominators[2], Some(6));
@@ -47,9 +47,9 @@ fn paper_slt() {
 #[test]
 fn immediate_dominator() {
     let graph = TestGraph::new(1, &[(1, 2), (2, 3)]);
-    let tree = dominators(&graph);
-    assert_eq!(tree.immediate_dominator(0), None);
-    assert_eq!(tree.immediate_dominator(1), None);
-    assert_eq!(tree.immediate_dominator(2), Some(1));
-    assert_eq!(tree.immediate_dominator(3), Some(2));
+    let dominators = dominators(&graph);
+    assert_eq!(dominators.immediate_dominator(0), None);
+    assert_eq!(dominators.immediate_dominator(1), None);
+    assert_eq!(dominators.immediate_dominator(2), Some(1));
+    assert_eq!(dominators.immediate_dominator(3), Some(2));
 }