Make borrowck test functions better match their names

A number of borrowck field-sensitivity tests perform more moves and
copies than their naming scheme would indicate. This is only necessary
for borrowed pointers (to ensure that the borrowws stay alive in the
near future when borrow liveness is tracked), but all other test
functions should be changed to match their name more closely.

Author: Cameron Zwarich

src/test/run-pass/borrowck-field-sensitivity.rs

@@ -28,15 +28,13 @@ fn move_after_fu_copy() {
 fn fu_move_after_copy() {
     let x = A { a: 1, b: box 2 };
     drop(x.a);
-    let y = A { a: 3, .. x };
-    drop(y.b);
+    let _y = A { a: 3, .. x };
 }
 
 fn fu_move_after_fu_copy() {
     let x = A { a: 1, b: box 2 };
     let _y = A { b: box 3, .. x };
-    let z = A { a: 4, .. x };
-    drop(z.b);
+    let _z = A { a: 4, .. x };
 }
 
 fn copy_after_move() {
@@ -49,7 +47,6 @@ fn copy_after_fu_move() {
     let x = A { a: 1, b: box 2 };
     let y = A { a: 3, .. x };
     drop(x.a);
-    drop(y.b);
 }
 
 fn fu_copy_after_move() {
@@ -60,9 +57,8 @@ fn fu_copy_after_move() {
 
 fn fu_copy_after_fu_move() {
     let x = A { a: 1, b: box 2 };
-    let y = A { a: 3, .. x };
+    let _y = A { a: 3, .. x };
     let _z = A { b: box 3, .. x };
-    drop(y.b);
 }
 
 fn borrow_after_move() {
@@ -73,9 +69,8 @@ fn borrow_after_move() {
 
 fn borrow_after_fu_move() {
     let x = A { a: 1, b: box 2 };
-    let y = A { a: 3, .. x };
+    let _y = A { a: 3, .. x };
     borrow(&x.a);
-    drop(y.b);
 }
 
 fn move_after_borrow() {
@@ -87,8 +82,7 @@ fn move_after_borrow() {
 fn fu_move_after_borrow() {
     let x = A { a: 1, b: box 2 };
     borrow(&x.a);
-    let y = A { a: 3, .. x };
-    drop(y.b);
+    let _y = A { a: 3, .. x };
 }
 
 fn mut_borrow_after_mut_borrow() {
@@ -109,7 +103,6 @@ fn move_after_fu_move() {
     let x = B { a: box 1, b: box 2 };
     let y = B { a: box 3, .. x };
     drop(x.a);
-    drop(y.b);
 }
 
 fn fu_move_after_move() {
@@ -121,10 +114,8 @@ fn fu_move_after_move() {
 
 fn fu_move_after_fu_move() {
     let x = B { a: box 1, b: box 2 };
-    let y = B { b: box 3, .. x };
-    let z = B { a: box 4, .. x };
-    drop(y.a);
-    drop(z.b);
+    let _y = B { b: box 3, .. x };
+    let _z = B { a: box 4, .. x };
 }
 
 fn copy_after_assign_after_move() {
@@ -157,10 +148,9 @@ fn borrow_after_field_assign_after_move() {
 
 fn move_after_assign_after_move() {
     let mut x = A { a: 1, b: box 2 };
-    let y = x.b;
+    let _y = x.b;
     x = A { a: 3, b: box 4 };
     drop(x.b);
-    drop(y);
 }
 
 fn move_after_field_assign_after_move() {