From f46debea6cd36c51e8e66ec5c985c431af0815f0 Mon Sep 17 00:00:00 2001
From: Scott Smart <42444435+sesmart@users.noreply.github.com>
Date: Tue, 12 May 2026 12:09:04 -0400
Subject: [PATCH] add barrier adjoint

---
 src/braket/circuits/compiler_directives.py                  | 3 +++
 test/unit_tests/braket/circuits/test_compiler_directives.py | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/src/braket/circuits/compiler_directives.py b/src/braket/circuits/compiler_directives.py
index 329dcc3f6..73cb7f98f 100644
--- a/src/braket/circuits/compiler_directives.py
+++ b/src/braket/circuits/compiler_directives.py
@@ -95,3 +95,6 @@ def to_ir(
                 return f"barrier {qubits};"
             return "barrier;"
         return super().to_ir(target, ir_type, serialization_properties, **kwargs)
+
+    def counterpart(self) -> CompilerDirective:
+        return Barrier(self._qubit_indices)
diff --git a/test/unit_tests/braket/circuits/test_compiler_directives.py b/test/unit_tests/braket/circuits/test_compiler_directives.py
index ae1e4905f..d9c6f90bc 100644
--- a/test/unit_tests/braket/circuits/test_compiler_directives.py
+++ b/test/unit_tests/braket/circuits/test_compiler_directives.py
@@ -68,3 +68,8 @@ def test_barrier():
 
     result = barrier.to_ir([], IRType.OPENQASM, props)
     assert result == "barrier;"
+
+
+def test_adjoint_barrier():
+    barrier = compiler_directives.Barrier([0, 1, 2])
+    assert barrier.counterpart() == barrier