Include rustc version in rustc_span::StableCrateId

Normalize symbol hashes in compiletest.

Remove DefId sorting

Author: pierwill

compiler/rustc_resolve/src/late/lifetimes.rs

@@ -2009,7 +2009,7 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
             }
         };
 
-        let mut def_ids: Vec<_> = defined_by
+        let def_ids: Vec<_> = defined_by
             .values()
             .flat_map(|region| match region {
                 Region::EarlyBound(_, def_id, _)
@@ -2020,9 +2020,6 @@ impl<'a, 'tcx> LifetimeContext<'a, 'tcx> {
             })
             .collect();
 
-        // ensure that we issue lints in a repeatable order
-        def_ids.sort_by_cached_key(|&def_id| self.tcx.def_path_hash(def_id));
-
         'lifetimes: for def_id in def_ids {
             debug!("check_uses_for_lifetimes_defined_by_scope: def_id = {:?}", def_id);
 

compiler/rustc_span/src/def_id.rs

@@ -126,12 +126,12 @@ impl Borrow<Fingerprint> for DefPathHash {
     }
 }
 
-/// A [StableCrateId] is a 64 bit hash of the crate name combined with all
-/// `-Cmetadata` arguments. It is to [CrateNum] what [DefPathHash] is to
-/// [DefId]. It is stable across compilation sessions.
+/// A [`StableCrateId`] is a 64 bit hash of the crate name combined with all
+/// `-Cmetadata` arguments. It is to [`CrateNum`] what [`DefPathHash`] is to
+/// [`DefId`]. It is stable across compilation sessions.
 ///
 /// Since the ID is a hash value there is a (very small) chance that two crates
-/// end up with the same [StableCrateId]. The compiler will check for such
+/// end up with the same [`StableCrateId`]. The compiler will check for such
 /// collisions when loading crates and abort compilation in order to avoid
 /// further trouble.
 #[derive(Copy, Clone, Hash, PartialEq, Eq, PartialOrd, Ord, Debug)]
@@ -152,7 +152,7 @@ impl StableCrateId {
         let mut hasher = StableHasher::new();
         crate_name.hash(&mut hasher);
 
-        // We don't want the stable crate id to dependent on the order
+        // We don't want the stable crate ID to depend on the order of
         // -C metadata arguments, so sort them:
         metadata.sort();
         // Every distinct -C metadata value is only incorporated once:
@@ -171,6 +171,12 @@ impl StableCrateId {
         // linking against a library of the same name, if this is an executable.
         hasher.write(if is_exe { b"exe" } else { b"lib" });
 
+        // Also incorporate the rustc version. Otherwise, with -Zsymbol-mangling-version=v0
+        // and no -Cmetadata, symbols from the same crate compiled with different versions of
+        // rustc are named the same.
+        let rustc_version = option_env!("CFG_VERSION").unwrap_or("unknown version").as_bytes();
+        hasher.write(rustc_version);
+
         StableCrateId(hasher.finish())
     }
 }

src/test/mir-opt/const_promotion_extern_static.BAR.PromoteTemps.diff

@@ -30,7 +30,7 @@
 -         _3 = [move _4];                  // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:35
 -         _2 = &_3;                        // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
 +                                          // + span: $DIR/const-promotion-extern-static.rs:9:31: 9:44
-+                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:6 ~ const_promotion_extern_static[55e6]::BAR), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
++                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:6 ~ const_promotion_extern_static[HASH]::BAR), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
 +         _2 = &(*_6);                     // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
           _1 = move _2 as &[&i32] (Pointer(Unsize)); // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
 -         StorageDead(_4);                 // scope 0 at $DIR/const-promotion-extern-static.rs:9:34: 9:35

src/test/mir-opt/const_promotion_extern_static.FOO.PromoteTemps.diff

@@ -32,7 +32,7 @@
 -         _3 = [move _4];                  // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:46
 -         _2 = &_3;                        // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
 +                                          // + span: $DIR/const-promotion-extern-static.rs:13:31: 13:55
-+                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:7 ~ const_promotion_extern_static[55e6]::FOO), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
++                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:7 ~ const_promotion_extern_static[HASH]::FOO), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
 +         _2 = &(*_6);                     // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
           _1 = move _2 as &[&i32] (Pointer(Unsize)); // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
 -         StorageDead(_4);                 // scope 0 at $DIR/const-promotion-extern-static.rs:13:45: 13:46

src/test/mir-opt/const_prop/bad_op_unsafe_oob_for_slices.main.ConstProp.32bit.diff

@@ -31,7 +31,7 @@
                                            // + val: Unevaluated(main, [], Some(promoted[0]))
                                            // mir::Constant
                                            // + span: $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
-                                           // + literal: Const { ty: &[i32; 3], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ bad_op_unsafe_oob_for_slices[8240]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
+                                           // + literal: Const { ty: &[i32; 3], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ bad_op_unsafe_oob_for_slices[HASH]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
           _3 = _9;                         // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
           _2 = &raw const (*_3);           // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
           _1 = move _2 as *const [i32] (Pointer(Unsize)); // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35

src/test/mir-opt/const_prop/bad_op_unsafe_oob_for_slices.main.ConstProp.64bit.diff

@@ -31,7 +31,7 @@
                                            // + val: Unevaluated(main, [], Some(promoted[0]))
                                            // mir::Constant
                                            // + span: $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
-                                           // + literal: Const { ty: &[i32; 3], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ bad_op_unsafe_oob_for_slices[8240]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
+                                           // + literal: Const { ty: &[i32; 3], val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ bad_op_unsafe_oob_for_slices[HASH]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
           _3 = _9;                         // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
           _2 = &raw const (*_3);           // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
           _1 = move _2 as *const [i32] (Pointer(Unsize)); // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35

src/test/mir-opt/const_prop/const_prop_fails_gracefully.main.ConstProp.diff

@@ -22,7 +22,7 @@
                                            // + val: Unevaluated(FOO, [], None)
                                            // mir::Constant
                                            // + span: $DIR/const_prop_fails_gracefully.rs:7:13: 7:16
-                                           // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:5 ~ const_prop_fails_gracefully[2706]::main::FOO), const_param_did: None }, substs_: Some([]), promoted: None }) }
+                                           // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:5 ~ const_prop_fails_gracefully[HASH]::main::FOO), const_param_did: None }, substs_: Some([]), promoted: None }) }
           _2 = &raw const (*_3);           // scope 0 at $DIR/const_prop_fails_gracefully.rs:7:13: 7:16
           _1 = move _2 as usize (Misc);    // scope 0 at $DIR/const_prop_fails_gracefully.rs:7:13: 7:39
           StorageDead(_2);                 // scope 0 at $DIR/const_prop_fails_gracefully.rs:7:38: 7:39

src/test/mir-opt/const_prop/ref_deref.main.ConstProp.diff

@@ -17,7 +17,7 @@
                                            // + val: Unevaluated(main, [], Some(promoted[0]))
                                            // mir::Constant
                                            // + span: $DIR/ref_deref.rs:5:6: 5:10
-                                           // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ ref_deref[cb9b]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
+                                           // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ ref_deref[HASH]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
           _2 = _4;                         // scope 0 at $DIR/ref_deref.rs:5:6: 5:10
 -         _1 = (*_2);                      // scope 0 at $DIR/ref_deref.rs:5:5: 5:10
 +         _1 = const 4_i32;                // scope 0 at $DIR/ref_deref.rs:5:5: 5:10

src/test/mir-opt/const_prop/ref_deref.main.PromoteTemps.diff

@@ -20,7 +20,7 @@
 +                                          // + val: Unevaluated(main, [], Some(promoted[0]))
 +                                          // mir::Constant
 +                                          // + span: $DIR/ref_deref.rs:5:6: 5:10
-+                                          // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ ref_deref[cb9b]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
++                                          // + literal: Const { ty: &i32, val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ ref_deref[HASH]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
 +         _2 = &(*_4);                     // scope 0 at $DIR/ref_deref.rs:5:6: 5:10
           _1 = (*_2);                      // scope 0 at $DIR/ref_deref.rs:5:5: 5:10
 -         StorageDead(_3);                 // scope 0 at $DIR/ref_deref.rs:5:10: 5:11

src/test/mir-opt/const_prop/ref_deref_project.main.ConstProp.diff

@@ -17,7 +17,7 @@
                                            // + val: Unevaluated(main, [], Some(promoted[0]))
                                            // mir::Constant
                                            // + span: $DIR/ref_deref_project.rs:5:6: 5:17
-                                           // + literal: Const { ty: &(i32, i32), val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ ref_deref_project[e8c3]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
+                                           // + literal: Const { ty: &(i32, i32), val: Unevaluated(Unevaluated { def: WithOptConstParam { did: DefId(0:3 ~ ref_deref_project[HASH]::main), const_param_did: None }, substs_: Some([]), promoted: Some(promoted[0]) }) }
           _2 = &((*_4).1: i32);            // scope 0 at $DIR/ref_deref_project.rs:5:6: 5:17
           _1 = (*_2);                      // scope 0 at $DIR/ref_deref_project.rs:5:5: 5:17
           StorageDead(_2);                 // scope 0 at $DIR/ref_deref_project.rs:5:17: 5:18