diff options
Diffstat (limited to 'js/src/jit-test/tests/wasm/tail-calls/litmus8.js')
-rw-r--r-- | js/src/jit-test/tests/wasm/tail-calls/litmus8.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/tail-calls/litmus8.js b/js/src/jit-test/tests/wasm/tail-calls/litmus8.js new file mode 100644 index 0000000000..4602664488 --- /dev/null +++ b/js/src/jit-test/tests/wasm/tail-calls/litmus8.js @@ -0,0 +1,38 @@ +// |jit-test| skip-if: !wasmTailCallsEnabled() || !wasmExceptionsEnabled() + +// Tail-call litmus test with multiple results +// +// Mutually recursive functions implement a multi-entry loop using 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 + (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 $even (i32.sub (local.get $n) (i32.const 1))))) + 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 $odd (i32.sub (local.get $n) (i32.const 1)) (i32.const 33))))) +) +`); + +assertErrorMessage(() => ins.exports.even(TailCallIterations), WebAssembly.Exception, /.*/); +assertSame(ins.exports.odd(TailCallIterations, 33), [0, 32769, -37]); + +assertErrorMessage(() => ins.exports.odd(TailCallIterations+1, 33), WebAssembly.Exception, /.*/); +assertSame(ins.exports.even(TailCallIterations+1), [0, 32769, -37]); |