From 933fc180bd7a3a096e9412e8535cd254a92705be Mon Sep 17 00:00:00 2001
From: Eric Mark Martin <ericmarkmartin@gmail.com>
Date: Wed, 26 Jul 2023 00:15:29 -0400
Subject: [PATCH] add stable NullaryOp

---
 compiler/rustc_smir/src/rustc_smir/mod.rs      | 4 +++-
 compiler/rustc_smir/src/stable_mir/mir/body.rs | 3 +++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_smir/src/rustc_smir/mod.rs b/compiler/rustc_smir/src/rustc_smir/mod.rs
index 044e2f8f325..9bf3d031217 100644
--- a/compiler/rustc_smir/src/rustc_smir/mod.rs
+++ b/compiler/rustc_smir/src/rustc_smir/mod.rs
@@ -156,7 +156,9 @@ fn stable(&self, tables: &mut Tables<'tcx>) -> Self::T {
                 ops.0.stable(tables),
                 ops.1.stable(tables),
             ),
-            NullaryOp(_, _) => todo!(),
+            NullaryOp(null_op, ty) => {
+                stable_mir::mir::Rvalue::NullaryOp(null_op.stable(tables), tables.intern_ty(*ty))
+            }
             UnaryOp(un_op, op) => {
                 stable_mir::mir::Rvalue::UnaryOp(un_op.stable(tables), op.stable(tables))
             }
diff --git a/compiler/rustc_smir/src/stable_mir/mir/body.rs b/compiler/rustc_smir/src/stable_mir/mir/body.rs
index 831eb6589e4..1b1871bcd2a 100644
--- a/compiler/rustc_smir/src/stable_mir/mir/body.rs
+++ b/compiler/rustc_smir/src/stable_mir/mir/body.rs
@@ -218,6 +218,9 @@ pub enum Rvalue {
     /// nature of this operation?
     ThreadLocalRef(stable_mir::CrateItem),
 
+    /// Computes a value as described by the operation.
+    NullaryOp(NullOp, Ty),
+
     /// Exactly like `BinaryOp`, but less operands.
     ///
     /// Also does two's-complement arithmetic. Negation requires a signed integer or a float;