1 files changed, 46 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/regress/bug1858982.js b/js/src/jit-test/tests/wasm/regress/bug1858982.js
new file mode 100644
index 0000000000..574c4bfe24
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/regress/bug1858982.js
@@ -0,0 +1,46 @@
+// |jit-test| --wasm-tail-calls; --wasm-gc; skip-if: !wasmGcEnabled() || !wasmTailCallsEnabled()
+
+// Tests if instance registers were restored properly when call_ref is used
+// with tail calls.
+var t = wasmEvalText(`(module
+    (type $t1 (func))
+    (func $f0 (param funcref i32 i32 i32 i32 i32 i32 i32 i32 i32)
+        local.get 0
+        ref.cast (ref $t1)
+        return_call_ref $t1
+    )
+    (func $f1 (param i32))
+    (elem declare func $f)
+    (func $f (param funcref)
+        (local i32 i32 i32 i32)
+        local.get 0
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        i32.const 1
+        return_call $f0
+    )
+    (func (export "f") (result funcref)
+        ref.func $f
+    )
+)`);
+
+var t2 = wasmEvalText(`(module
+    (import "" "f" (func $fi (result funcref)))
+    (type $t1 (func (param funcref)))
+    (elem declare func $f2)
+    (func $f2)
+    (func (export "test")
+        ref.func $f2
+        call $fi
+        ref.cast (ref $t1)
+        call_ref $t1
+    )
+)`, {"": {f:t.exports.f},});
+
+t2.exports.test();