Rollup merge of #108856 - Zeegomo:remove-drop-and-rep, r=tmiasko

Remove DropAndReplace terminator

#107844 made DropAndReplace unused, let's remove it completely from the codebase.

1 files changed, 0 insertions, 38 deletions

diff --git a/compiler/rustc_middle/src/mir/syntax.rs b/compiler/rustc_middle/src/mir/syntax.rs
index ae09562a85e..58c060db660 100644
--- a/compiler/rustc_middle/src/mir/syntax.rs
+++ b/compiler/rustc_middle/src/mir/syntax.rs
@@ -133,7 +133,6 @@ pub enum AnalysisPhase {
 pub enum RuntimePhase {
     /// In addition to the semantic changes, beginning with this phase, the following variants are
     /// disallowed:
-    /// * [`TerminatorKind::DropAndReplace`]
     /// * [`TerminatorKind::Yield`]
     /// * [`TerminatorKind::GeneratorDrop`]
     /// * [`Rvalue::Aggregate`] for any `AggregateKind` except `Array`
@@ -596,43 +595,6 @@ pub enum TerminatorKind<'tcx> {
     /// > consider indirect assignments.
     Drop { place: Place<'tcx>, target: BasicBlock, unwind: Option<BasicBlock> },
 
-    /// Drops the place and assigns a new value to it.
-    ///
-    /// This first performs the exact same operation as the pre drop-elaboration `Drop` terminator;
-    /// it then additionally assigns the `value` to the `place` as if by an assignment statement.
-    /// This assignment occurs both in the unwind and the regular code paths. The semantics are best
-    /// explained by the elaboration:
-    ///
-    /// ```ignore (MIR)
-    /// BB0 {
-    ///   DropAndReplace(P <- V, goto BB1, unwind BB2)
-    /// }
-    /// ```
-    ///
-    /// becomes
-    ///
-    /// ```ignore (MIR)
-    /// BB0 {
-    ///   Drop(P, goto BB1, unwind BB2)
-    /// }
-    /// BB1 {
-    ///   // P is now uninitialized
-    ///   P <- V
-    /// }
-    /// BB2 {
-    ///   // P is now uninitialized -- its dtor panicked
-    ///   P <- V
-    /// }
-    /// ```
-    ///
-    /// Disallowed after drop elaboration.
-    DropAndReplace {
-        place: Place<'tcx>,
-        value: Operand<'tcx>,
-        target: BasicBlock,
-        unwind: Option<BasicBlock>,
-    },
-
     /// Roughly speaking, evaluates the `func` operand and the arguments, and starts execution of
     /// the referred to function. The operand types must match the argument types of the function.
     /// The return place type must match the return type. The type of the `func` operand must be