Auto merge of #99780 - Nilstrieb:mir-opt-test-line-no, r=oli-obk

Use line numbers relative to the function in mir-opt tests

As shown in #99770, the line numbers can be a big source of needless and confusing diffs. This PR adds a new flag `-Zmir-pretty-relative-line-numbers` to make them relative to the function declaration, which avoids most needless diffs from attribute changes.

`@JakobDegen` told me that there has been a zulip conversation about disabling line numbers with mixed opinions, so I'd like to get some feedback here, for this hopefully better solution.

r? rust-lang/wg-mir-opt

1 files changed, 25 insertions, 25 deletions

diff --git a/src/test/mir-opt/simplify_cfg.main.SimplifyCfg-initial.diff b/src/test/mir-opt/simplify_cfg.main.SimplifyCfg-initial.diff
index 78841d28b85..f693798eb94 100644
--- a/src/test/mir-opt/simplify_cfg.main.SimplifyCfg-initial.diff
+++ b/src/test/mir-opt/simplify_cfg.main.SimplifyCfg-initial.diff
@@ -2,70 +2,70 @@
 + // MIR for `main` after SimplifyCfg-initial
   
   fn main() -> () {
-      let mut _0: ();                      // return place in scope 0 at $DIR/simplify_cfg.rs:7:11: 7:11
-      let mut _1: ();                      // in scope 0 at $DIR/simplify_cfg.rs:7:1: 13:2
-      let mut _2: bool;                    // in scope 0 at $DIR/simplify_cfg.rs:9:12: 9:17
-      let mut _3: !;                       // in scope 0 at $DIR/simplify_cfg.rs:9:18: 11:10
+      let mut _0: ();                      // return place in scope 0 at $DIR/simplify_cfg.rs:+0:11: +0:11
+      let mut _1: ();                      // in scope 0 at $DIR/simplify_cfg.rs:+0:1: +6:2
+      let mut _2: bool;                    // in scope 0 at $DIR/simplify_cfg.rs:+2:12: +2:17
+      let mut _3: !;                       // in scope 0 at $DIR/simplify_cfg.rs:+2:18: +4:10
   
       bb0: {
-          goto -> bb1;                     // scope 0 at $DIR/simplify_cfg.rs:8:5: 12:6
+          goto -> bb1;                     // scope 0 at $DIR/simplify_cfg.rs:+1:5: +5:6
       }
   
       bb1: {
--         falseUnwind -> [real: bb2, cleanup: bb11]; // scope 0 at $DIR/simplify_cfg.rs:8:5: 12:6
-+         falseUnwind -> [real: bb2, cleanup: bb6]; // scope 0 at $DIR/simplify_cfg.rs:8:5: 12:6
+-         falseUnwind -> [real: bb2, cleanup: bb11]; // scope 0 at $DIR/simplify_cfg.rs:+1:5: +5:6
++         falseUnwind -> [real: bb2, cleanup: bb6]; // scope 0 at $DIR/simplify_cfg.rs:+1:5: +5:6
       }
   
       bb2: {
-          StorageLive(_2);                 // scope 0 at $DIR/simplify_cfg.rs:9:12: 9:17
--         _2 = bar() -> [return: bb3, unwind: bb11]; // scope 0 at $DIR/simplify_cfg.rs:9:12: 9:17
-+         _2 = bar() -> [return: bb3, unwind: bb6]; // scope 0 at $DIR/simplify_cfg.rs:9:12: 9:17
+          StorageLive(_2);                 // scope 0 at $DIR/simplify_cfg.rs:+2:12: +2:17
+-         _2 = bar() -> [return: bb3, unwind: bb11]; // scope 0 at $DIR/simplify_cfg.rs:+2:12: +2:17
++         _2 = bar() -> [return: bb3, unwind: bb6]; // scope 0 at $DIR/simplify_cfg.rs:+2:12: +2:17
                                            // mir::Constant
                                            // + span: $DIR/simplify_cfg.rs:9:12: 9:15
                                            // + literal: Const { ty: fn() -> bool {bar}, val: Value(<ZST>) }
       }
   
       bb3: {
-          switchInt(move _2) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/simplify_cfg.rs:9:12: 9:17
+          switchInt(move _2) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/simplify_cfg.rs:+2:12: +2:17
       }
   
       bb4: {
-          _0 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:10:13: 10:18
--         goto -> bb10;                    // scope 0 at $DIR/simplify_cfg.rs:10:13: 10:18
-+         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:11:9: 11:10
-+         return;                          // scope 0 at $DIR/simplify_cfg.rs:13:2: 13:2
+          _0 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:+3:13: +3:18
+-         goto -> bb10;                    // scope 0 at $DIR/simplify_cfg.rs:+3:13: +3:18
++         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:+4:9: +4:10
++         return;                          // scope 0 at $DIR/simplify_cfg.rs:+6:2: +6:2
       }
   
       bb5: {
--         goto -> bb8;                     // scope 0 at $DIR/simplify_cfg.rs:9:12: 9:17
+-         goto -> bb8;                     // scope 0 at $DIR/simplify_cfg.rs:+2:12: +2:17
 -     }
 - 
 -     bb6: {
--         unreachable;                     // scope 0 at $DIR/simplify_cfg.rs:9:18: 11:10
+-         unreachable;                     // scope 0 at $DIR/simplify_cfg.rs:+2:18: +4:10
 -     }
 - 
 -     bb7: {
--         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:9:9: 11:10
+-         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:+2:9: +4:10
 -     }
 - 
 -     bb8: {
-          _1 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:11:10: 11:10
--         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:9:9: 11:10
+          _1 = const ();                   // scope 0 at $DIR/simplify_cfg.rs:+4:10: +4:10
+-         goto -> bb9;                     // scope 0 at $DIR/simplify_cfg.rs:+2:9: +4:10
 -     }
 - 
 -     bb9: {
-          StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:11:9: 11:10
-          goto -> bb1;                     // scope 0 at $DIR/simplify_cfg.rs:8:5: 12:6
+          StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:+4:9: +4:10
+          goto -> bb1;                     // scope 0 at $DIR/simplify_cfg.rs:+1:5: +5:6
       }
   
 -     bb10: {
--         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:11:9: 11:10
--         return;                          // scope 0 at $DIR/simplify_cfg.rs:13:2: 13:2
+-         StorageDead(_2);                 // scope 0 at $DIR/simplify_cfg.rs:+4:9: +4:10
+-         return;                          // scope 0 at $DIR/simplify_cfg.rs:+6:2: +6:2
 -     }
 - 
 -     bb11 (cleanup): {
 +     bb6 (cleanup): {
-          resume;                          // scope 0 at $DIR/simplify_cfg.rs:7:1: 13:2
+          resume;                          // scope 0 at $DIR/simplify_cfg.rs:+0:1: +6:2
       }
   }