diff --git a/src/test/mir-opt/inline/inline_instruction_set.default.Inline.diff b/src/test/mir-opt/inline/inline_instruction_set.default.Inline.diff
index 334cf5a08e2c5..916244f1f6afb 100644
--- a/src/test/mir-opt/inline/inline_instruction_set.default.Inline.diff
+++ b/src/test/mir-opt/inline/inline_instruction_set.default.Inline.diff
@@ -36,7 +36,6 @@
 -     }
 - 
 -     bb3: {
-+         _3 = const ();                   // scope 1 at $DIR/inline-instruction-set.rs:53:5: 53:30
           StorageDead(_3);                 // scope 0 at $DIR/inline-instruction-set.rs:53:30: 53:31
           _0 = const ();                   // scope 0 at $DIR/inline-instruction-set.rs:50:18: 54:2
           return;                          // scope 0 at $DIR/inline-instruction-set.rs:54:2: 54:2
diff --git a/src/test/mir-opt/inline/inline_instruction_set.t32.Inline.diff b/src/test/mir-opt/inline/inline_instruction_set.t32.Inline.diff
index 920b68c9daa1e..8907bae9177aa 100644
--- a/src/test/mir-opt/inline/inline_instruction_set.t32.Inline.diff
+++ b/src/test/mir-opt/inline/inline_instruction_set.t32.Inline.diff
@@ -27,7 +27,6 @@
 -     }
 - 
 -     bb2: {
-+         _2 = const ();                   // scope 1 at $DIR/inline-instruction-set.rs:43:5: 43:26
           StorageDead(_2);                 // scope 0 at $DIR/inline-instruction-set.rs:43:26: 43:27
           StorageLive(_3);                 // scope 0 at $DIR/inline-instruction-set.rs:46:5: 46:30
 -         _3 = instruction_set_default() -> bb3; // scope 0 at $DIR/inline-instruction-set.rs:46:5: 46:30
diff --git a/src/test/mir-opt/matches_reduce_branches.foo.MatchBranchSimplification.64bit.diff b/src/test/mir-opt/matches_reduce_branches.foo.MatchBranchSimplification.64bit.diff
index 6ee8e6b774832..9f0db1db1b28e 100644
--- a/src/test/mir-opt/matches_reduce_branches.foo.MatchBranchSimplification.64bit.diff
+++ b/src/test/mir-opt/matches_reduce_branches.foo.MatchBranchSimplification.64bit.diff
@@ -5,22 +5,25 @@
       debug bar => _1;                     // in scope 0 at $DIR/matches_reduce_branches.rs:7:8: 7:11
       let mut _0: ();                      // return place in scope 0 at $DIR/matches_reduce_branches.rs:7:25: 7:25
       let mut _2: isize;                   // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
++     let mut _3: isize;                   // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
   
       bb0: {
           _2 = discriminant(_1);           // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
-          switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
-      }
-  
-      bb1: {
-          _0 = const ();                   // scope 0 at $DIR/matches_reduce_branches.rs:10:6: 10:6
-          goto -> bb3;                     // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
-      }
-  
-      bb2: {
-          goto -> bb3;                     // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
-      }
-  
-      bb3: {
+-         switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
+-     }
+- 
+-     bb1: {
+-         goto -> bb3;                     // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
+-     }
+- 
+-     bb2: {
+-         goto -> bb3;                     // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
+-     }
+- 
+-     bb3: {
++         StorageLive(_3);                 // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
++         _3 = move _2;                    // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
++         StorageDead(_3);                 // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
           return;                          // scope 0 at $DIR/matches_reduce_branches.rs:11:2: 11:2
       }
   }
diff --git a/src/test/mir-opt/matches_reduce_branches.foo.PreCodegen.before.64bit.mir b/src/test/mir-opt/matches_reduce_branches.foo.PreCodegen.before.64bit.mir
index 8ec09ce866562..e3b318c949fc6 100644
--- a/src/test/mir-opt/matches_reduce_branches.foo.PreCodegen.before.64bit.mir
+++ b/src/test/mir-opt/matches_reduce_branches.foo.PreCodegen.before.64bit.mir
@@ -3,19 +3,8 @@
 fn foo(_1: Option<()>) -> () {
     debug bar => _1;                     // in scope 0 at $DIR/matches_reduce_branches.rs:7:8: 7:11
     let mut _0: ();                      // return place in scope 0 at $DIR/matches_reduce_branches.rs:7:25: 7:25
-    let mut _2: isize;                   // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
 
     bb0: {
-        _2 = discriminant(_1);           // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
-        switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
-    }
-
-    bb1: {
-        _0 = const ();                   // scope 0 at $DIR/matches_reduce_branches.rs:10:6: 10:6
-        return;                          // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
-    }
-
-    bb2: {
-        return;                          // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
+        return;                          // scope 0 at $DIR/matches_reduce_branches.rs:11:2: 11:2
     }
 }