Rollup merge of #86566 - fee1-dead:mir-pretty-print, r=oli-obk

Use `use_verbose` for `mir::Constant`

Fixes #79799.

Author: JohnTitor

compiler/rustc_mir/src/util/pretty.rs

@@ -426,14 +426,14 @@ impl ExtraComments<'tcx> {
     }
 }
 
-fn use_verbose(ty: &&TyS<'tcx>) -> bool {
+fn use_verbose(ty: &&TyS<'tcx>, fn_def: bool) -> bool {
     match ty.kind() {
         ty::Int(_) | ty::Uint(_) | ty::Bool | ty::Char | ty::Float(_) => false,
         // Unit type
         ty::Tuple(g_args) if g_args.is_empty() => false,
-        ty::Tuple(g_args) => g_args.iter().any(|g_arg| use_verbose(&g_arg.expect_ty())),
-        ty::Array(ty, _) => use_verbose(ty),
-        ty::FnDef(..) => false,
+        ty::Tuple(g_args) => g_args.iter().any(|g_arg| use_verbose(&g_arg.expect_ty(), fn_def)),
+        ty::Array(ty, _) => use_verbose(ty, fn_def),
+        ty::FnDef(..) => fn_def,
         _ => true,
     }
 }
@@ -442,28 +442,20 @@ impl Visitor<'tcx> for ExtraComments<'tcx> {
     fn visit_constant(&mut self, constant: &Constant<'tcx>, location: Location) {
         self.super_constant(constant, location);
         let Constant { span, user_ty, literal } = constant;
-        match literal.ty().kind() {
-            ty::Int(_) | ty::Uint(_) | ty::Bool | ty::Char => {}
-            // Unit type
-            ty::Tuple(tys) if tys.is_empty() => {}
-            _ => {
-                self.push("mir::Constant");
-                self.push(&format!(
-                    "+ span: {}",
-                    self.tcx.sess.source_map().span_to_embeddable_string(*span)
-                ));
-                if let Some(user_ty) = user_ty {
-                    self.push(&format!("+ user_ty: {:?}", user_ty));
-                }
-                match literal {
-                    ConstantKind::Ty(literal) => self.push(&format!("+ literal: {:?}", literal)),
-                    ConstantKind::Val(val, ty) => {
-                        // To keep the diffs small, we render this almost like we render ty::Const
-                        self.push(&format!(
-                            "+ literal: Const {{ ty: {}, val: Value({:?}) }}",
-                            ty, val
-                        ))
-                    }
+        if use_verbose(&literal.ty(), true) {
+            self.push("mir::Constant");
+            self.push(&format!(
+                "+ span: {}",
+                self.tcx.sess.source_map().span_to_embeddable_string(*span)
+            ));
+            if let Some(user_ty) = user_ty {
+                self.push(&format!("+ user_ty: {:?}", user_ty));
+            }
+            match literal {
+                ConstantKind::Ty(literal) => self.push(&format!("+ literal: {:?}", literal)),
+                ConstantKind::Val(val, ty) => {
+                    // To keep the diffs small, we render this almost like we render ty::Const
+                    self.push(&format!("+ literal: Const {{ ty: {}, val: Value({:?}) }}", ty, val))
                 }
             }
         }
@@ -472,7 +464,7 @@ impl Visitor<'tcx> for ExtraComments<'tcx> {
     fn visit_const(&mut self, constant: &&'tcx ty::Const<'tcx>, _: Location) {
         self.super_const(constant);
         let ty::Const { ty, val, .. } = constant;
-        if use_verbose(ty) {
+        if use_verbose(ty, false) {
             self.push("ty::Const");
             self.push(&format!("+ ty: {:?}", ty));
             let val = match val {

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

@@ -14,9 +14,6 @@
 -         _2 = CheckedAdd(const 1_u32, const 1_u32); // scope 0 at $DIR/checked_add.rs:5:18: 5:23
 -         assert(!move (_2.1: bool), "attempt to compute `{} + {}`, which would overflow", const 1_u32, const 1_u32) -> bb1; // scope 0 at $DIR/checked_add.rs:5:18: 5:23
 +         _2 = const (2_u32, false);       // scope 0 at $DIR/checked_add.rs:5:18: 5:23
-+                                          // mir::Constant
-+                                          // + span: $DIR/checked_add.rs:5:18: 5:23
-+                                          // + literal: Const { ty: (u32, bool), val: Value(ByRef { alloc: Allocation { bytes: [2, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [31], len: Size { raw: 8 } }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
 +         assert(!const false, "attempt to compute `{} + {}`, which would overflow", const 1_u32, const 1_u32) -> bb1; // scope 0 at $DIR/checked_add.rs:5:18: 5:23
       }
 

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

@@ -18,9 +18,6 @@
 -         assert(!move (_3.1: bool), "attempt to compute `{} + {}`, which would overflow", move _2, const 1_u8) -> bb1; // scope 0 at $DIR/indirect.rs:5:13: 5:29
 +         _2 = const 2_u8;                 // scope 0 at $DIR/indirect.rs:5:13: 5:25
 +         _3 = const (3_u8, false);        // scope 0 at $DIR/indirect.rs:5:13: 5:29
-+                                          // mir::Constant
-+                                          // + span: $DIR/indirect.rs:5:13: 5:29
-+                                          // + literal: Const { ty: (u8, bool), val: Value(ByRef { alloc: Allocation { bytes: [3, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [3], len: Size { raw: 2 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
 +         assert(!const false, "attempt to compute `{} + {}`, which would overflow", const 2_u8, const 1_u8) -> bb1; // scope 0 at $DIR/indirect.rs:5:13: 5:29
       }
 

src/test/mir-opt/const_prop/issue_67019.main.ConstProp.diff

@@ -15,9 +15,6 @@
           (_3.1: u8) = const 2_u8;         // scope 0 at $DIR/issue-67019.rs:11:11: 11:17
 -         (_2.0: (u8, u8)) = move _3;      // scope 0 at $DIR/issue-67019.rs:11:10: 11:19
 +         (_2.0: (u8, u8)) = const (1_u8, 2_u8); // scope 0 at $DIR/issue-67019.rs:11:10: 11:19
-+                                          // mir::Constant
-+                                          // + span: $DIR/issue-67019.rs:11:10: 11:19
-+                                          // + literal: Const { ty: (u8, u8), val: Value(ByRef { alloc: Allocation { bytes: [1, 2], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [3], len: Size { raw: 2 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
           StorageDead(_3);                 // scope 0 at $DIR/issue-67019.rs:11:18: 11:19
           _1 = test(move _2) -> bb1;       // scope 0 at $DIR/issue-67019.rs:11:5: 11:20
                                            // mir::Constant

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

@@ -20,9 +20,6 @@
           StorageLive(_2);                 // scope 1 at $DIR/mutable_variable_aggregate.rs:7:9: 7:10
 -         _2 = _1;                         // scope 1 at $DIR/mutable_variable_aggregate.rs:7:13: 7:14
 +         _2 = const (42_i32, 99_i32);     // scope 1 at $DIR/mutable_variable_aggregate.rs:7:13: 7:14
-+                                          // mir::Constant
-+                                          // + span: $DIR/mutable_variable_aggregate.rs:7:13: 7:14
-+                                          // + literal: Const { ty: (i32, i32), val: Value(ByRef { alloc: Allocation { bytes: [42, 0, 0, 0, 99, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
           nop;                             // scope 0 at $DIR/mutable_variable_aggregate.rs:4:11: 8:2
           StorageDead(_2);                 // scope 1 at $DIR/mutable_variable_aggregate.rs:8:1: 8:2
           StorageDead(_1);                 // scope 0 at $DIR/mutable_variable_aggregate.rs:8:1: 8:2

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

@@ -27,9 +27,6 @@
 -         _2 = CheckedAdd(const 2_i32, const 2_i32); // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
 -         assert(!move (_2.1: bool), "attempt to compute `{} + {}`, which would overflow", const 2_i32, const 2_i32) -> bb1; // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
 +         _2 = const (4_i32, false);       // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
-+                                          // mir::Constant
-+                                          // + span: $DIR/optimizes_into_variable.rs:12:13: 12:18
-+                                          // + literal: Const { ty: (i32, bool), val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [31], len: Size { raw: 8 } }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
 +         assert(!const false, "attempt to compute `{} + {}`, which would overflow", const 2_i32, const 2_i32) -> bb1; // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
       }
 

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

@@ -27,9 +27,6 @@
 -         _2 = CheckedAdd(const 2_i32, const 2_i32); // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
 -         assert(!move (_2.1: bool), "attempt to compute `{} + {}`, which would overflow", const 2_i32, const 2_i32) -> bb1; // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
 +         _2 = const (4_i32, false);       // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
-+                                          // mir::Constant
-+                                          // + span: $DIR/optimizes_into_variable.rs:12:13: 12:18
-+                                          // + literal: Const { ty: (i32, bool), val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [31], len: Size { raw: 8 } }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
 +         assert(!const false, "attempt to compute `{} + {}`, which would overflow", const 2_i32, const 2_i32) -> bb1; // scope 0 at $DIR/optimizes_into_variable.rs:12:13: 12:18
       }
 

src/test/mir-opt/const_prop/return_place.add.ConstProp.diff

@@ -9,9 +9,6 @@
 -         _1 = CheckedAdd(const 2_u32, const 2_u32); // scope 0 at $DIR/return_place.rs:6:5: 6:10
 -         assert(!move (_1.1: bool), "attempt to compute `{} + {}`, which would overflow", const 2_u32, const 2_u32) -> bb1; // scope 0 at $DIR/return_place.rs:6:5: 6:10
 +         _1 = const (4_u32, false);       // scope 0 at $DIR/return_place.rs:6:5: 6:10
-+                                          // mir::Constant
-+                                          // + span: $DIR/return_place.rs:6:5: 6:10
-+                                          // + literal: Const { ty: (u32, bool), val: Value(ByRef { alloc: Allocation { bytes: [4, 0, 0, 0, 0, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [31], len: Size { raw: 8 } }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
 +         assert(!const false, "attempt to compute `{} + {}`, which would overflow", const 2_u32, const 2_u32) -> bb1; // scope 0 at $DIR/return_place.rs:6:5: 6:10
       }
 

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

@@ -18,9 +18,6 @@
           StorageLive(_3);                 // scope 1 at $DIR/tuple_literal_propagation.rs:5:13: 5:14
 -         _3 = _1;                         // scope 1 at $DIR/tuple_literal_propagation.rs:5:13: 5:14
 +         _3 = const (1_u32, 2_u32);       // scope 1 at $DIR/tuple_literal_propagation.rs:5:13: 5:14
-+                                          // mir::Constant
-+                                          // + span: $DIR/tuple_literal_propagation.rs:5:13: 5:14
-+                                          // + literal: Const { ty: (u32, u32), val: Value(ByRef { alloc: Allocation { bytes: [1, 0, 0, 0, 2, 0, 0, 0], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [255], len: Size { raw: 8 } }, align: Align { pow2: 2 }, mutability: Not, extra: () }, offset: Size { raw: 0 } }) }
           _2 = consume(move _3) -> bb1;    // scope 1 at $DIR/tuple_literal_propagation.rs:5:5: 5:15
                                            // mir::Constant
                                            // + span: $DIR/tuple_literal_propagation.rs:5:5: 5:12

src/test/mir-opt/deaggregator_test.bar.Deaggregator.diff

@@ -12,9 +12,6 @@
 -         _0 = Baz { x: move _2, y: const 0f32, z: const false }; // scope 0 at $DIR/deaggregator_test.rs:9:5: 9:35
 +         (_0.0: usize) = move _2;         // scope 0 at $DIR/deaggregator_test.rs:9:5: 9:35
 +         (_0.1: f32) = const 0f32;        // scope 0 at $DIR/deaggregator_test.rs:9:5: 9:35
-                                           // mir::Constant
-                                           // + span: $DIR/deaggregator_test.rs:9:20: 9:23
-                                           // + literal: Const { ty: f32, val: Value(Scalar(0x00000000)) }
 +         (_0.2: bool) = const false;      // scope 0 at $DIR/deaggregator_test.rs:9:5: 9:35
           StorageDead(_2);                 // scope 0 at $DIR/deaggregator_test.rs:9:34: 9:35
           return;                          // scope 0 at $DIR/deaggregator_test.rs:10:2: 10:2

src/test/mir-opt/if_condition_int.dont_opt_floats.SimplifyComparisonIntegral.diff

@@ -12,9 +12,6 @@
           StorageLive(_3);                 // scope 0 at $DIR/if-condition-int.rs:53:8: 53:9
           _3 = _1;                         // scope 0 at $DIR/if-condition-int.rs:53:8: 53:9
           _2 = Eq(move _3, const -42f32);  // scope 0 at $DIR/if-condition-int.rs:53:8: 53:18
-                                           // mir::Constant
-                                           // + span: $DIR/if-condition-int.rs:53:13: 53:18
-                                           // + literal: Const { ty: f32, val: Value(Scalar(0xc2280000)) }
           StorageDead(_3);                 // scope 0 at $DIR/if-condition-int.rs:53:17: 53:18
           switchInt(move _2) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/if-condition-int.rs:53:5: 53:35
       }

src/test/mir-opt/simplify_locals_removes_unused_consts.main.SimplifyLocals.diff

@@ -38,9 +38,6 @@
                                            // mir::Constant
                                            // + span: $DIR/simplify-locals-removes-unused-consts.rs:14:5: 14:12
                                            // + literal: Const { ty: fn(((), ())) {use_zst}, val: Value(Scalar(<ZST>)) }
-                                           // mir::Constant
-                                           // + span: $DIR/simplify-locals-removes-unused-consts.rs:14:5: 14:22
-                                           // + literal: Const { ty: ((), ()), val: Value(Scalar(<ZST>)) }
       }
 
       bb1: {