change mir::Constant in mir dumps

rust-lang · Feb 22, 2022 · ee0b564 · ee0b564
1 parent b8967b0
commit ee0b564
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Showing 69 changed files with 107 additions and 349 deletions.
diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs
@@ -436,8 +436,7 @@ fn use_verbose<'tcx>(ty: Ty<'tcx>, fn_def: bool) -> bool {
 }
 
 impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> {
-    fn visit_constant(&mut self, constant: &Constant<'tcx>, location: Location) {
-        self.super_constant(constant, location);
+    fn visit_constant(&mut self, constant: &Constant<'tcx>, _location: Location) {
         let Constant { span, user_ty, literal } = constant;
         if use_verbose(literal.ty(), true) {
             self.push("mir::Constant");
@@ -448,38 +447,30 @@ impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> {
             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))
-                }
-            }
-        }
-    }
 
-    fn visit_const(&mut self, constant: ty::Const<'tcx>, _: Location) {
-        self.super_const(constant);
-        let ty = constant.ty();
-        let val = constant.val();
-        if use_verbose(ty, false) {
-            self.push("ty::Const");
-            self.push(&format!("+ ty: {:?}", ty));
-            let val = match val {
-                ty::ConstKind::Param(p) => format!("Param({})", p),
-                ty::ConstKind::Infer(infer) => format!("Infer({:?})", infer),
-                ty::ConstKind::Bound(idx, var) => format!("Bound({:?}, {:?})", idx, var),
-                ty::ConstKind::Placeholder(ph) => format!("PlaceHolder({:?})", ph),
-                ty::ConstKind::Unevaluated(uv) => format!(
-                    "Unevaluated({}, {:?}, {:?})",
-                    self.tcx.def_path_str(uv.def.did),
-                    uv.substs,
-                    uv.promoted,
-                ),
-                ty::ConstKind::Value(val) => format!("Value({:?})", val),
-                ty::ConstKind::Error(_) => "Error".to_string(),
+            let val = match literal {
+                ConstantKind::Ty(ct) => match ct.val() {
+                    ty::ConstKind::Param(p) => format!("Param({})", p),
+                    ty::ConstKind::Unevaluated(uv) => format!(
+                        "Unevaluated({}, {:?}, {:?})",
+                        self.tcx.def_path_str(uv.def.did),
+                        uv.substs,
+                        uv.promoted,
+                    ),
+                    ty::ConstKind::Value(val) => format!("Value({:?})", val),
+                    ty::ConstKind::Error(_) => "Error".to_string(),
+                    // These variants shouldn't exist in the MIR.
+                    ty::ConstKind::Placeholder(_)
+                    | ty::ConstKind::Infer(_)
+                    | ty::ConstKind::Bound(..) => bug!("unexpected MIR constant: {:?}", literal),
+                },
+                // To keep the diffs small, we render this like we render `ty::Const::Value`.
+                //
+                // This changes once `ty::Const::Value` is represented using valtrees.
+                ConstantKind::Val(val, _) => format!("Value({:?})", val),
             };
-            self.push(&format!("+ val: {}", val));
+
+            self.push(&format!("+ literal: Const {{ ty: {}, val: {} }}", literal.ty(), val));
         }
     }
 

diff --git a/src/test/mir-opt/box_expr.main.ElaborateDrops.before.mir b/src/test/mir-opt/box_expr.main.ElaborateDrops.before.mir
@@ -47,7 +47,7 @@ fn main() -> () {
         _6 = std::mem::drop::<Box<S>>(move _7) -> [return: bb4, unwind: bb6]; // scope 1 at $DIR/box_expr.rs:8:5: 8:12
                                          // mir::Constant
                                          // + span: $DIR/box_expr.rs:8:5: 8:9
-                                         // + literal: Const { ty: fn(std::boxed::Box<S>) {std::mem::drop::<std::boxed::Box<S>>}, val: Value(Scalar(<ZST>)) }
+                                         // + literal: Const { ty: fn(Box<S>) {std::mem::drop::<Box<S>>}, val: Value(Scalar(<ZST>)) }
     }
 
     bb4: {

diff --git a/src/test/mir-opt/byte_slice.main.SimplifyCfg-elaborate-drops.after.mir b/src/test/mir-opt/byte_slice.main.SimplifyCfg-elaborate-drops.after.mir
@@ -14,9 +14,6 @@ fn main() -> () {
     bb0: {
         StorageLive(_1);                 // scope 0 at $DIR/byte_slice.rs:5:9: 5:10
         _1 = const b"foo";               // scope 0 at $DIR/byte_slice.rs:5:13: 5:19
-                                         // ty::Const
-                                         // + ty: &[u8; 3]
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/byte_slice.rs:5:13: 5:19
                                          // + literal: Const { ty: &[u8; 3], val: Value(Scalar(alloc1)) }

diff --git a/src/test/mir-opt/const_allocation.main.ConstProp.after.32bit.mir b/src/test/mir-opt/const_allocation.main.ConstProp.after.32bit.mir
@@ -9,12 +9,9 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
         StorageLive(_2);                 // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
         _2 = const {alloc1: &&[(Option<i32>, &[&str])]}; // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
-                                         // ty::Const
-                                         // + ty: &&[(std::option::Option<i32>, &[&str])]
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const_allocation.rs:8:5: 8:8
-                                         // + literal: Const { ty: &&[(std::option::Option<i32>, &[&str])], val: Value(Scalar(alloc1)) }
+                                         // + literal: Const { ty: &&[(Option<i32>, &[&str])], val: Value(Scalar(alloc1)) }
         _1 = (*_2);                      // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
         StorageDead(_2);                 // scope 0 at $DIR/const_allocation.rs:8:8: 8:9
         StorageDead(_1);                 // scope 0 at $DIR/const_allocation.rs:8:8: 8:9

diff --git a/src/test/mir-opt/const_allocation.main.ConstProp.after.64bit.mir b/src/test/mir-opt/const_allocation.main.ConstProp.after.64bit.mir
@@ -9,12 +9,9 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
         StorageLive(_2);                 // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
         _2 = const {alloc1: &&[(Option<i32>, &[&str])]}; // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
-                                         // ty::Const
-                                         // + ty: &&[(std::option::Option<i32>, &[&str])]
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const_allocation.rs:8:5: 8:8
-                                         // + literal: Const { ty: &&[(std::option::Option<i32>, &[&str])], val: Value(Scalar(alloc1)) }
+                                         // + literal: Const { ty: &&[(Option<i32>, &[&str])], val: Value(Scalar(alloc1)) }
         _1 = (*_2);                      // scope 0 at $DIR/const_allocation.rs:8:5: 8:8
         StorageDead(_2);                 // scope 0 at $DIR/const_allocation.rs:8:8: 8:9
         StorageDead(_1);                 // scope 0 at $DIR/const_allocation.rs:8:8: 8:9

diff --git a/src/test/mir-opt/const_allocation2.main.ConstProp.after.32bit.mir b/src/test/mir-opt/const_allocation2.main.ConstProp.after.32bit.mir
@@ -9,12 +9,9 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
         StorageLive(_2);                 // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
         _2 = const {alloc1: &&[(Option<i32>, &[&u8])]}; // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
-                                         // ty::Const
-                                         // + ty: &&[(std::option::Option<i32>, &[&u8])]
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const_allocation2.rs:5:5: 5:8
-                                         // + literal: Const { ty: &&[(std::option::Option<i32>, &[&u8])], val: Value(Scalar(alloc1)) }
+                                         // + literal: Const { ty: &&[(Option<i32>, &[&u8])], val: Value(Scalar(alloc1)) }
         _1 = (*_2);                      // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
         StorageDead(_2);                 // scope 0 at $DIR/const_allocation2.rs:5:8: 5:9
         StorageDead(_1);                 // scope 0 at $DIR/const_allocation2.rs:5:8: 5:9

diff --git a/src/test/mir-opt/const_allocation2.main.ConstProp.after.64bit.mir b/src/test/mir-opt/const_allocation2.main.ConstProp.after.64bit.mir
@@ -9,12 +9,9 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
         StorageLive(_2);                 // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
         _2 = const {alloc1: &&[(Option<i32>, &[&u8])]}; // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
-                                         // ty::Const
-                                         // + ty: &&[(std::option::Option<i32>, &[&u8])]
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const_allocation2.rs:5:5: 5:8
-                                         // + literal: Const { ty: &&[(std::option::Option<i32>, &[&u8])], val: Value(Scalar(alloc1)) }
+                                         // + literal: Const { ty: &&[(Option<i32>, &[&u8])], val: Value(Scalar(alloc1)) }
         _1 = (*_2);                      // scope 0 at $DIR/const_allocation2.rs:5:5: 5:8
         StorageDead(_2);                 // scope 0 at $DIR/const_allocation2.rs:5:8: 5:9
         StorageDead(_1);                 // scope 0 at $DIR/const_allocation2.rs:5:8: 5:9

diff --git a/src/test/mir-opt/const_allocation3.main.ConstProp.after.32bit.mir b/src/test/mir-opt/const_allocation3.main.ConstProp.after.32bit.mir
@@ -9,9 +9,6 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/const_allocation3.rs:5:5: 5:8
         StorageLive(_2);                 // scope 0 at $DIR/const_allocation3.rs:5:5: 5:8
         _2 = const {alloc1: &&Packed};   // scope 0 at $DIR/const_allocation3.rs:5:5: 5:8
-                                         // ty::Const
-                                         // + ty: &&Packed
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const_allocation3.rs:5:5: 5:8
                                          // + literal: Const { ty: &&Packed, val: Value(Scalar(alloc1)) }

diff --git a/src/test/mir-opt/const_allocation3.main.ConstProp.after.64bit.mir b/src/test/mir-opt/const_allocation3.main.ConstProp.after.64bit.mir
@@ -9,9 +9,6 @@ fn main() -> () {
         StorageLive(_1);                 // scope 0 at $DIR/const_allocation3.rs:5:5: 5:8
         StorageLive(_2);                 // scope 0 at $DIR/const_allocation3.rs:5:5: 5:8
         _2 = const {alloc1: &&Packed};   // scope 0 at $DIR/const_allocation3.rs:5:5: 5:8
-                                         // ty::Const
-                                         // + ty: &&Packed
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const_allocation3.rs:5:5: 5:8
                                          // + literal: Const { ty: &&Packed, val: Value(Scalar(alloc1)) }

diff --git a/src/test/mir-opt/const_debuginfo.main.ConstDebugInfo.diff b/src/test/mir-opt/const_debuginfo.main.ConstDebugInfo.diff
@@ -75,9 +75,6 @@
           StorageDead(_5);                 // scope 3 at $DIR/const_debuginfo.rs:12:23: 12:24
           StorageLive(_9);                 // scope 4 at $DIR/const_debuginfo.rs:14:9: 14:10
           _9 = const "hello, world!";      // scope 4 at $DIR/const_debuginfo.rs:14:13: 14:28
-                                           // ty::Const
-                                           // + ty: &str
-                                           // + val: Value(Slice { data: Allocation { bytes: [104, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [8191], len: Size { raw: 13 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 13 })
                                            // mir::Constant
                                            // + span: $DIR/const_debuginfo.rs:14:13: 14:28
                                            // + literal: Const { ty: &str, val: Value(Slice { data: Allocation { bytes: [104, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33], relocations: Relocations(SortedMap { data: [] }), init_mask: InitMask { blocks: [8191], len: Size { raw: 13 } }, align: Align { pow2: 0 }, mutability: Not, extra: () }, start: 0, end: 13 }) }

diff --git a/...r-opt/const_promotion_extern_static.BAR-promoted[0].SimplifyCfg-elaborate-drops.after.mir b/...r-opt/const_promotion_extern_static.BAR-promoted[0].SimplifyCfg-elaborate-drops.after.mir
@@ -8,9 +8,6 @@ promoted[0] in BAR: &[&i32; 1] = {
 
     bb0: {
         _3 = const {alloc1: &i32};       // scope 0 at $DIR/const-promotion-extern-static.rs:9:33: 9:34
-                                         // ty::Const
-                                         // + ty: &i32
-                                         // + val: Value(Scalar(alloc1))
                                          // mir::Constant
                                          // + span: $DIR/const-promotion-extern-static.rs:9:33: 9:34
                                          // + literal: Const { ty: &i32, val: Value(Scalar(alloc1)) }

diff --git a/src/test/mir-opt/const_promotion_extern_static.BAR.PromoteTemps.diff b/src/test/mir-opt/const_promotion_extern_static.BAR.PromoteTemps.diff
@@ -18,19 +18,14 @@
 -         StorageLive(_5);                 // scope 0 at $DIR/const-promotion-extern-static.rs:9:33: 9:34
 -         _5 = const {alloc1: &i32};       // scope 0 at $DIR/const-promotion-extern-static.rs:9:33: 9:34
 +         _6 = const BAR::promoted[0];     // scope 0 at $DIR/const-promotion-extern-static.rs:9:31: 9:44
-                                           // ty::Const
--                                          // + ty: &i32
--                                          // + val: Value(Scalar(alloc1))
-+                                          // + ty: &[&i32; 1]
-+                                          // + val: Unevaluated(BAR, [], Some(promoted[0]))
                                            // mir::Constant
 -                                          // + span: $DIR/const-promotion-extern-static.rs:9:33: 9:34
 -                                          // + literal: Const { ty: &i32, val: Value(Scalar(alloc1)) }
 -         _4 = &(*_5);                     // scope 0 at $DIR/const-promotion-extern-static.rs:9:32: 9:34
 -         _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[e01c]::BAR), const_param_did: None }, substs: [], promoted: Some(promoted[0]) }) }
++                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(BAR, [], 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

diff --git a/...r-opt/const_promotion_extern_static.FOO-promoted[0].SimplifyCfg-elaborate-drops.after.mir b/...r-opt/const_promotion_extern_static.FOO-promoted[0].SimplifyCfg-elaborate-drops.after.mir
@@ -8,9 +8,6 @@ promoted[0] in FOO: &[&i32; 1] = {
 
     bb0: {
         _3 = const {alloc3: *const i32}; // scope 0 at $DIR/const-promotion-extern-static.rs:13:42: 13:43
-                                         // ty::Const
-                                         // + ty: *const i32
-                                         // + val: Value(Scalar(alloc3))
                                          // mir::Constant
                                          // + span: $DIR/const-promotion-extern-static.rs:13:42: 13:43
                                          // + literal: Const { ty: *const i32, val: Value(Scalar(alloc3)) }

diff --git a/src/test/mir-opt/const_promotion_extern_static.FOO.PromoteTemps.diff b/src/test/mir-opt/const_promotion_extern_static.FOO.PromoteTemps.diff
@@ -20,19 +20,14 @@
 -         StorageLive(_5);                 // scope 1 at $DIR/const-promotion-extern-static.rs:13:42: 13:43
 -         _5 = const {alloc3: *const i32}; // scope 1 at $DIR/const-promotion-extern-static.rs:13:42: 13:43
 +         _6 = const FOO::promoted[0];     // scope 0 at $DIR/const-promotion-extern-static.rs:13:31: 13:55
-                                           // ty::Const
--                                          // + ty: *const i32
--                                          // + val: Value(Scalar(alloc3))
-+                                          // + ty: &[&i32; 1]
-+                                          // + val: Unevaluated(FOO, [], Some(promoted[0]))
                                            // mir::Constant
 -                                          // + span: $DIR/const-promotion-extern-static.rs:13:42: 13:43
 -                                          // + literal: Const { ty: *const i32, val: Value(Scalar(alloc3)) }
 -         _4 = &(*_5);                     // scope 1 at $DIR/const-promotion-extern-static.rs:13:41: 13:43
 -         _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[e01c]::FOO), const_param_did: None }, substs: [], promoted: Some(promoted[0]) }) }
++                                          // + literal: Const { ty: &[&i32; 1], val: Unevaluated(FOO, [], 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

diff --git a/src/test/mir-opt/const_prop/bad_op_unsafe_oob_for_slices.main.ConstProp.32bit.diff b/src/test/mir-opt/const_prop/bad_op_unsafe_oob_for_slices.main.ConstProp.32bit.diff
@@ -26,12 +26,9 @@
           StorageLive(_2);                 // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
           StorageLive(_3);                 // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
           _9 = const main::promoted[0];    // scope 0 at $DIR/bad_op_unsafe_oob_for_slices.rs:5:25: 5:35
-                                           // ty::Const
-                                           // + ty: &[i32; 3]
-                                           // + 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[fbcf]::main), const_param_did: None }, substs: [], promoted: Some(promoted[0]) }) }
+                                           // + literal: Const { ty: &[i32; 3], val: Unevaluated(main, [], 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