Remove unsound-mir-opts for simplify_aggregate_to_copy

dianqk · dianqk · commit 087cdc00bc54 · 2025-04-02T19:59:26.000+08:00
diff --git a/compiler/rustc_mir_transform/src/gvn.rs b/compiler/rustc_mir_transform/src/gvn.rs
@@ -1098,9 +1098,7 @@ impl<'body, 'tcx> VnState<'body, 'tcx> {
             }
         }
 
-        // unsound: https://github.com/rust-lang/rust/issues/132353
-        if tcx.sess.opts.unstable_opts.unsound_mir_opts
-            && let AggregateTy::Def(_, _) = ty
+        if let AggregateTy::Def(_, _) = ty
             && let Some(value) =
                 self.simplify_aggregate_to_copy(rvalue, location, &fields, variant_index)
         {
diff --git a/tests/codegen/clone_as_copy.rs b/tests/codegen/clone_as_copy.rs
@@ -1,6 +1,4 @@
 //@ revisions: DEBUGINFO NODEBUGINFO
-//@ compile-flags: -Zunsound-mir-opts
-// FIXME: see <https://github.com/rust-lang/rust/issues/132353>
 //@ compile-flags: -Copt-level=3 -Cno-prepopulate-passes
 //@ [DEBUGINFO] compile-flags: -Cdebuginfo=full
 
diff --git a/tests/codegen/try_question_mark_nop.rs b/tests/codegen/try_question_mark_nop.rs
@@ -16,12 +16,17 @@ use std::ptr::NonNull;
 #[no_mangle]
 pub fn option_nop_match_32(x: Option<u32>) -> Option<u32> {
     // CHECK: start:
-    // TWENTY-NEXT: %[[IS_SOME:.+]] = trunc nuw i32 %0 to i1
-    // TWENTY-NEXT: %[[PAYLOAD:.+]] = select i1 %[[IS_SOME]], i32 %1, i32 undef
-    // CHECK-NEXT: [[REG1:%.*]] = insertvalue { i32, i32 } poison, i32 %0, 0
-    // NINETEEN-NEXT: [[REG2:%.*]] = insertvalue { i32, i32 } [[REG1]], i32 %1, 1
-    // TWENTY-NEXT: [[REG2:%.*]] = insertvalue { i32, i32 } [[REG1]], i32 %[[PAYLOAD]], 1
-    // CHECK-NEXT: ret { i32, i32 } [[REG2]]
+    // CHECK-NEXT: [[TRUNC:%.*]] = trunc nuw i32 %0 to i1
+
+    // NINETEEN-NEXT: [[SELECT:%.*]] = select i1 [[TRUNC]], i32 %0, i32 0
+    // NINETEEN-NEXT: [[REG2:%.*]] = insertvalue { i32, i32 } poison, i32 [[SELECT]], 0
+    // NINETEEN-NEXT: [[REG3:%.*]] = insertvalue { i32, i32 } [[REG2]], i32 %1, 1
+
+    // TWENTY-NEXT: [[SELECT:%.*]] = select i1 [[TRUNC]], i32 %1, i32 undef
+    // TWENTY-NEXT: [[REG2:%.*]] = insertvalue { i32, i32 } poison, i32 %0, 0
+    // TWENTY-NEXT: [[REG3:%.*]] = insertvalue { i32, i32 } [[REG2]], i32 [[SELECT]], 1
+
+    // CHECK-NEXT: ret { i32, i32 } [[REG3]]
     match x {
         Some(x) => Some(x),
         None => None,
@@ -164,8 +169,8 @@ pub fn control_flow_nop_traits_64(x: ControlFlow<i64, u64>) -> ControlFlow<i64,
 #[no_mangle]
 pub fn result_nop_match_128(x: Result<i128, u128>) -> Result<i128, u128> {
     // CHECK: start:
-    // CHECK-NEXT: getelementptr inbounds {{(nuw )?}}i8
     // CHECK-NEXT: store i128
+    // CHECK-NEXT: getelementptr inbounds {{(nuw )?}}i8
     // CHECK-NEXT: store i128
     // CHECK-NEXT: ret void
     match x {
@@ -189,8 +194,8 @@ pub fn result_nop_traits_128(x: Result<i128, u128>) -> Result<i128, u128> {
 #[no_mangle]
 pub fn control_flow_nop_match_128(x: ControlFlow<i128, u128>) -> ControlFlow<i128, u128> {
     // CHECK: start:
-    // CHECK-NEXT: getelementptr inbounds {{(nuw )?}}i8
     // CHECK-NEXT: store i128
+    // CHECK-NEXT: getelementptr inbounds {{(nuw )?}}i8
     // CHECK-NEXT: store i128
     // CHECK-NEXT: ret void
     match x {
diff --git a/tests/mir-opt/gvn_clone.rs b/tests/mir-opt/gvn_clone.rs
@@ -1,5 +1,3 @@
-//@ compile-flags: -Zunsound-mir-opts
-// FIXME: see <https://github.com/rust-lang/rust/issues/132353>
 //@ test-mir-pass: GVN
 //@ compile-flags: -Zmir-enable-passes=+InstSimplify-before-inline
 
diff --git a/tests/mir-opt/gvn_clone.{impl#0}-clone.GVN.diff b/tests/mir-opt/gvn_clone.{impl#0}-clone.GVN.diff
@@ -1,7 +1,7 @@
-- // MIR for `<impl at $DIR/gvn_clone.rs:14:10: 14:15>::clone` before GVN
-+ // MIR for `<impl at $DIR/gvn_clone.rs:14:10: 14:15>::clone` after GVN
+- // MIR for `<impl at $DIR/gvn_clone.rs:12:10: 12:15>::clone` before GVN
++ // MIR for `<impl at $DIR/gvn_clone.rs:12:10: 12:15>::clone` after GVN
   
-  fn <impl at $DIR/gvn_clone.rs:14:10: 14:15>::clone(_1: &AllCopy) -> AllCopy {
+  fn <impl at $DIR/gvn_clone.rs:12:10: 12:15>::clone(_1: &AllCopy) -> AllCopy {
       debug self => _1;
       let mut _0: AllCopy;
       let mut _2: i32;
diff --git a/tests/mir-opt/gvn_copy_aggregate.rs b/tests/mir-opt/gvn_copy_aggregate.rs
@@ -1,5 +1,3 @@
-//@ compile-flags: -Zunsound-mir-opts
-// FIXME: see <https://github.com/rust-lang/rust/issues/132353.
 //@ test-mir-pass: GVN
 //@ compile-flags: -Cpanic=abort
 
diff --git a/tests/mir-opt/pre-codegen/clone_as_copy.rs b/tests/mir-opt/pre-codegen/clone_as_copy.rs
@@ -1,5 +1,3 @@
-//@ compile-flags: -Zunsound-mir-opts
-// FIXME: see <https://github.com/rust-lang/rust/issues/132353>
 //@ compile-flags: -Cdebuginfo=full
 
 // Check if we have transformed the nested clone to the copy in the complete pipeline.
diff --git a/tests/mir-opt/pre-codegen/no_inlined_clone.{impl#0}-clone.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/no_inlined_clone.{impl#0}-clone.PreCodegen.after.mir
@@ -3,13 +3,9 @@
 fn <impl at $DIR/no_inlined_clone.rs:9:10: 9:15>::clone(_1: &Foo) -> Foo {
     debug self => _1;
     let mut _0: Foo;
-    let mut _2: i32;
 
     bb0: {
-        StorageLive(_2);
-        _2 = copy ((*_1).0: i32);
-        _0 = Foo { a: move _2 };
-        StorageDead(_2);
+        _0 = copy (*_1);
         return;
     }
 }
diff --git a/tests/mir-opt/pre-codegen/try_identity.old.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/try_identity.old.PreCodegen.after.mir
@@ -19,14 +19,14 @@ fn old(_1: Result<T, E>) -> Result<T, E> {
     }
 
     bb1: {
-        _3 = move ((_1 as Ok).0: T);
-        _0 = Result::<T, E>::Ok(copy _3);
+        _3 = copy ((_1 as Ok).0: T);
+        _0 = copy _1;
         goto -> bb3;
     }
 
     bb2: {
-        _4 = move ((_1 as Err).0: E);
-        _0 = Result::<T, E>::Err(copy _4);
+        _4 = copy ((_1 as Err).0: E);
+        _0 = copy _1;
         goto -> bb3;
     }
 
diff --git a/tests/mir-opt/simplify_aggregate_to_copy_miscompile.foo.GVN.diff b/tests/mir-opt/simplify_aggregate_to_copy_miscompile.foo.GVN.diff
@@ -6,60 +6,52 @@
       let mut _0: std::option::Option<i32>;
       let mut _2: &std::option::Option<i32>;
       let mut _3: &std::option::Option<i32>;
-      let _4: &&mut std::option::Option<i32>;
-      let mut _5: isize;
-      let mut _7: !;
-      let mut _8: std::option::Option<i32>;
-      let mut _9: i32;
-      let mut _10: !;
-      let mut _11: &mut std::option::Option<i32>;
+      let mut _4: isize;
+      let mut _6: !;
+      let mut _7: std::option::Option<i32>;
+      let mut _8: i32;
+      let mut _9: !;
       scope 1 {
-          debug col => _6;
-          let _6: i32;
+          debug col => _5;
+          let _5: i32;
       }
   
       bb0: {
           StorageLive(_2);
           StorageLive(_3);
-          StorageLive(_4);
-          _4 = &_1;
--         _11 = deref_copy (*_4);
--         _3 = &(*_11);
-+         _11 = copy _1;
-+         _3 = &(*_1);
+          _3 = &(*_1);
           _2 = get(move _3) -> [return: bb1, unwind unreachable];
       }
   
       bb1: {
           StorageDead(_3);
-          _5 = discriminant((*_2));
-          switchInt(move _5) -> [1: bb2, otherwise: bb3];
+          _4 = discriminant((*_2));
+          switchInt(move _4) -> [1: bb2, otherwise: bb3];
       }
   
       bb2: {
--         StorageLive(_6);
+-         StorageLive(_5);
 +         nop;
-          _6 = copy (((*_2) as Some).0: i32);
-          StorageLive(_8);
--         _8 = Option::<i32>::None;
--         (*_1) = move _8;
-+         _8 = const Option::<i32>::None;
+          _5 = copy (((*_2) as Some).0: i32);
+          StorageLive(_7);
+-         _7 = Option::<i32>::None;
+-         (*_1) = move _7;
++         _7 = const Option::<i32>::None;
 +         (*_1) = const Option::<i32>::None;
+          StorageDead(_7);
+          StorageLive(_8);
+          _8 = copy _5;
+-         _0 = Option::<i32>::Some(move _8);
++         _0 = Option::<i32>::Some(copy _5);
           StorageDead(_8);
-          StorageLive(_9);
-          _9 = copy _6;
--         _0 = Option::<i32>::Some(move _9);
-+         _0 = Option::<i32>::Some(copy _6);
-          StorageDead(_9);
--         StorageDead(_6);
+-         StorageDead(_5);
 +         nop;
-          StorageDead(_4);
           StorageDead(_2);
           return;
       }
   
       bb3: {
-          StorageLive(_10);
+          StorageLive(_9);
           unreachable;
       }
 + }
diff --git a/tests/mir-opt/simplify_aggregate_to_copy_miscompile.rs b/tests/mir-opt/simplify_aggregate_to_copy_miscompile.rs
@@ -7,16 +7,22 @@
 //! This test demonstrates the behavior, and should be adjusted or removed when fixing and relanding
 //! the mir-opt.
 #![crate_type = "lib"]
-// skip-filecheck
-//@ compile-flags: -O -Zunsound-mir-opts
 //@ test-mir-pass: GVN
 #![allow(internal_features)]
 #![feature(rustc_attrs, core_intrinsics)]
 
 // EMIT_MIR simplify_aggregate_to_copy_miscompile.foo.GVN.diff
 #[no_mangle]
 fn foo(v: &mut Option<i32>) -> Option<i32> {
-    if let &Some(col) = get(&v) {
+    // CHECK-LABEL: fn foo(
+    // CHECK-SAME: [[v:_.*]]: &mut Option<i32>
+    // CHECK: [[v_alias_1:_.*]] = &(*_1)
+    // CHECK-NEXT: [[v_alias_2:_.*]] = get(move [[v_alias_1]])
+    // CHECK: (*[[v]]) = const Option::<i32>::None;
+    // CHECK-NOT: _0 = copy (*[[v_alias_2]])
+    // CHECK: _0 = Option::<i32>::Some
+    // CHECK-NOT: _0 = copy (*[[v_alias_2]])
+    if let &Some(col) = get(v) {
         *v = None;
         return Some(col);
     } else {

Original file line number	Diff line number	Diff line change
`@@ -1098,9 +1098,7 @@ impl<'body, 'tcx> VnState<'body, 'tcx> {`
`1098`	`1098`	`}`
`1099`	`1099`	`}`
`1100`	`1100`
`1101`		`- // unsound: https://github.com/rust-lang/rust/issues/132353`
`1102`		`- if tcx.sess.opts.unstable_opts.unsound_mir_opts`
`1103`		`- && let AggregateTy::Def(_, _) = ty`
	`1101`	`+ if let AggregateTy::Def(_, _) = ty`
`1104`	`1102`	`&& let Some(value) =`
`1105`	`1103`	`self.simplify_aggregate_to_copy(rvalue, location, &fields, variant_index)`
`1106`	`1104`	`{`
Original file line number	Diff line number	Diff line change
`@@ -1,5 +1,3 @@`
`1`		`-//@ compile-flags: -Zunsound-mir-opts`
`2`		`-// FIXME: see <https://github.com/rust-lang/rust/issues/132353>`
`3`	`1`	`//@ test-mir-pass: GVN`
`4`	`2`	`//@ compile-flags: -Zmir-enable-passes=+InstSimplify-before-inline`
`5`	`3`
Original file line number	Diff line number	Diff line change
`@@ -3,13 +3,9 @@`
`3`	`3`	`fn <impl at $DIR/no_inlined_clone.rs:9:10: 9:15>::clone(_1: &Foo) -> Foo {`
`4`	`4`	`debug self => _1;`
`5`	`5`	`let mut _0: Foo;`
`6`		`- let mut _2: i32;`
`7`	`6`
`8`	`7`	`bb0: {`
`9`		`- StorageLive(_2);`
`10`		`- _2 = copy ((*_1).0: i32);`
`11`		`- _0 = Foo { a: move _2 };`
`12`		`- StorageDead(_2);`
	`8`	`+ _0 = copy (*_1);`
`13`	`9`	`return;`
`14`	`10`	`}`
`15`	`11`	`}`
Original file line number	Diff line number	Diff line change
`@@ -19,14 +19,14 @@ fn old(_1: Result<T, E>) -> Result<T, E> {`
`19`	`19`	`}`
`20`	`20`
`21`	`21`	`bb1: {`
`22`		`- _3 = move ((_1 as Ok).0: T);`
`23`		`- _0 = Result::<T, E>::Ok(copy _3);`
	`22`	`+ _3 = copy ((_1 as Ok).0: T);`
	`23`	`+ _0 = copy _1;`
`24`	`24`	`goto -> bb3;`
`25`	`25`	`}`
`26`	`26`
`27`	`27`	`bb2: {`
`28`		`- _4 = move ((_1 as Err).0: E);`
`29`		`- _0 = Result::<T, E>::Err(copy _4);`
	`28`	`+ _4 = copy ((_1 as Err).0: E);`
	`29`	`+ _0 = copy _1;`
`30`	`30`	`goto -> bb3;`
`31`	`31`	`}`
`32`	`32`