Clean up todos

Also add some span_bugs where it is unreachable

Author: JulianKnodt

compiler/rustc_mir/src/borrow_check/mod.rs

@@ -629,18 +629,11 @@ impl<'cx, 'tcx> dataflow::ResultsVisitor<'cx, 'tcx> for MirBorrowckCtxt<'cx, 'tc
 
             StatementKind::CopyNonOverlapping(box rustc_middle::mir::CopyNonOverlapping {
                 ..
-                /*
-                src,
-                dst,
-                count,
-                */
             }) => {
-                unreachable!()
-                /*
-                self.consume_operand(location, (src, span), flow_state);
-                self.consume_operand(location, (dst, span), flow_state);
-                self.consume_operand(location, (count, span), flow_state);
-                */
+                span_bug!(
+                    span,
+                    "Unexpected CopyNonOverlapping, should only appear after lower_intrinsics",
+                )
             }
             StatementKind::Nop
             | StatementKind::Coverage(..)

compiler/rustc_mir/src/borrow_check/type_check/mod.rs

@@ -1521,40 +1521,11 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 }
             }
             StatementKind::CopyNonOverlapping(box rustc_middle::mir::CopyNonOverlapping {
-                ref src,
-                ref dst,
-                ref count,
-            }) => {
-                let op_src_ty = self.normalize(src.ty(body, self.tcx()), location);
-                let op_dst_ty = self.normalize(dst.ty(body, self.tcx()), location);
-                // since CopyNonOverlapping is parametrized by 1 type,
-                // we only need to check that they are equal and not keep an extra parameter.
-                if let Err(terr) = self.eq_types(
-                    op_src_ty,
-                    op_dst_ty,
-                    location.to_locations(),
-                    ConstraintCategory::Internal,
-                ) {
-                    span_mirbug!(
-                        self,
-                        stmt,
-                        "bad arg ({:?} != {:?}): {:?}",
-                        op_src_ty,
-                        op_dst_ty,
-                        terr
-                    );
-                }
-
-                let op_cnt_ty = self.normalize(count.ty(body, self.tcx()), location);
-                if let Err(terr) = self.eq_types(
-                    op_cnt_ty,
-                    tcx.types.usize,
-                    location.to_locations(),
-                    ConstraintCategory::Internal,
-                ) {
-                    span_mirbug!(self, stmt, "bad arg ({:?} != usize): {:?}", op_cnt_ty, terr);
-                }
-            }
+                ..
+            }) => span_bug!(
+                stmt.source_info.span,
+                "Unexpected StatementKind::CopyNonOverlapping, should only appear after lowering_intrinsics",
+            ),
             StatementKind::FakeRead(..)
             | StatementKind::StorageLive(..)
             | StatementKind::StorageDead(..)

compiler/rustc_mir/src/dataflow/impls/borrows.rs

@@ -305,9 +305,8 @@ impl<'tcx> dataflow::GenKillAnalysis<'tcx> for Borrows<'_, 'tcx> {
             | mir::StatementKind::Retag { .. }
             | mir::StatementKind::AscribeUserType(..)
             | mir::StatementKind::Coverage(..)
+            | mir::StatementKind::CopyNonOverlapping(..)
             | mir::StatementKind::Nop => {}
-
-            mir::StatementKind::CopyNonOverlapping(..) => todo!(),
         }
     }
 

compiler/rustc_mir/src/dataflow/impls/storage_liveness.rs

@@ -149,9 +149,8 @@ impl<'mir, 'tcx> dataflow::GenKillAnalysis<'tcx> for MaybeRequiresStorage<'mir,
             | StatementKind::FakeRead(..)
             | StatementKind::Nop
             | StatementKind::Retag(..)
+            | StatementKind::CopyNonOverlapping(..)
             | StatementKind::StorageLive(..) => {}
-
-            StatementKind::CopyNonOverlapping(..) => todo!(),
         }
     }
 

compiler/rustc_mir/src/dataflow/move_paths/builder.rs

@@ -318,9 +318,8 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
             StatementKind::Retag { .. }
             | StatementKind::AscribeUserType(..)
             | StatementKind::Coverage(..)
+            | StatementKind::CopyNonOverlapping(..)
             | StatementKind::Nop => {}
-
-            StatementKind::CopyNonOverlapping(..) => todo!(),
         }
     }
 

compiler/rustc_mir/src/interpret/intrinsics.rs

@@ -323,9 +323,6 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 let result = Scalar::from_uint(truncated_bits, layout.size);
                 self.write_scalar(result, dest)?;
             }
-            sym::copy_nonoverlapping => {
-                self.copy_nonoverlapping(args[0], args[1], args[2])?;
-            }
             sym::copy => {
                 let elem_ty = instance.substs.type_at(0);
                 let elem_layout = self.layout_of(elem_ty)?;

compiler/rustc_mir/src/transform/validate.rs

@@ -294,7 +294,49 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
                     );
                 }
             }
-            _ => {}
+            StatementKind::CopyNonOverlapping(box rustc_middle::mir::CopyNonOverlapping {
+                ref src,
+                ref dst,
+                ref count,
+            }) => {
+                let src_ty = src.ty(&self.body.local_decls, self.tcx);
+                let op_src_ty = if let Some(src_deref) = src_ty.builtin_deref(true) {
+                    src_deref.ty
+                } else {
+                    self.fail(
+                        location,
+                        format!("Expected src to be ptr in copy_nonoverlapping, got: {}", src_ty),
+                    );
+                    return;
+                };
+                let dst_ty = dst.ty(&self.body.local_decls, self.tcx);
+                let op_dst_ty = if let Some(dst_deref) = dst_ty.builtin_deref(true) {
+                    dst_deref.ty
+                } else {
+                    self.fail(
+                        location,
+                        format!("Expected dst to be ptr in copy_nonoverlapping, got: {}", dst_ty),
+                    );
+                    return;
+                };
+                // since CopyNonOverlapping is parametrized by 1 type,
+                // we only need to check that they are equal and not keep an extra parameter.
+                if op_src_ty != op_dst_ty {
+                    self.fail(location, format!("bad arg ({:?} != {:?})", op_src_ty, op_dst_ty));
+                }
+
+                let op_cnt_ty = count.ty(&self.body.local_decls, self.tcx);
+                if op_cnt_ty != self.tcx.types.usize {
+                    self.fail(location, format!("bad arg ({:?} != usize)", op_cnt_ty))
+                }
+            }
+            StatementKind::SetDiscriminant { .. }
+            | StatementKind::StorageLive(..)
+            | StatementKind::StorageDead(..)
+            | StatementKind::LlvmInlineAsm(..)
+            | StatementKind::Retag(_, _)
+            | StatementKind::Coverage(_)
+            | StatementKind::Nop => {}
         }
 
         self.super_statement(statement, location);