1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/tail-calls/litmus9.js b/js/src/jit-test/tests/wasm/tail-calls/litmus9.js
new file mode 100644
index 0000000000..3bbde27111
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/tail-calls/litmus9.js
@@ -0,0 +1,42 @@
+// |jit-test| skip-if: !wasmTailCallsEnabled() || !wasmExceptionsEnabled()
+
+// Tail-call litmus test with multiple results
+//
+// Mutually recursive functions implement a multi-entry loop using indirect tail
+// calls, with exception handling.
+//
+// The functions do not have the same signatures, so if all arguments are stack
+// arguments then these use different amounts of stack space.
+//
+// The "even" function will throw when the input is zero, so when an exception
+// bubbles out of return_call it must not be caught by the exception handler in
+// "odd", but must instead be delegated to the caller, which is JS code.
+
+var ins = wasmEvalText(`
+(module
+  (table 2 2 funcref)
+  (elem (i32.const 0) $even $odd)
+  (type $even_t (func (param i32) (result i32 i32 i32)))
+  (type $odd_t (func (param i32 i32) (result i32 i32 i32)))
+  (tag $t)
+
+  (func $odd (export "odd") (param $n i32) (param $dummy i32) (result i32 i32 i32)
+    try (result i32 i32 i32)
+    (if (result i32 i32 i32) (i32.eqz (local.get $n))
+        (then (return (i32.const 0) (i32.const 32769) (i32.const -37)))
+        (else (return_call_indirect (type $even_t) (i32.sub (local.get $n) (i32.const 1))
+                              (i32.const 0))))
+    catch_all
+      unreachable
+    end)
+
+  (func $even (export "even") (param $n i32) (result i32 i32 i32)
+    (if (result i32 i32 i32) (i32.eqz (local.get $n))
+        (then (throw $t))
+        (else (return_call_indirect (type $odd_t) (i32.sub (local.get $n) (i32.const 1)) (i32.const 33)
+                              (i32.const 1)))))
+)
+`);
+
+assertErrorMessage(() => ins.exports.even(TailCallIterations), WebAssembly.Exception, /.*/);
+assertSame(ins.exports.odd(TailCallIterations, 33), [0, 32769, -37]);