diff options
Diffstat (limited to 'js/src/jit-test/tests/wasm/tail-calls/litmus0.js')
-rw-r--r-- | js/src/jit-test/tests/wasm/tail-calls/litmus0.js | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/tail-calls/litmus0.js b/js/src/jit-test/tests/wasm/tail-calls/litmus0.js new file mode 100644 index 0000000000..89e978c2e7 --- /dev/null +++ b/js/src/jit-test/tests/wasm/tail-calls/litmus0.js @@ -0,0 +1,24 @@ +// |jit-test| skip-if: !wasmTailCallsEnabled() + +// Loop implemented using tail calls - the call passes as many arguments as +// the function receives, of the same types. +// +// The variable ballast is intended to test that we handle various combinations +// of stack and register arguments properly. + +for ( let ballast=1; ballast < TailCallBallast; ballast++ ) { + let vals = iota(ballast,1); + let ps = vals.map(_ => 'i32').join(' ') + let es = vals.map(i => `(local.get ${1+i})`).join(' ') + let sum = vals.reduceRight((p,c) => `(i32.add (local.get ${c+1}) ${p})`, `(i32.const 0)`) + let sumv = vals.reduce((p,c) => p+c); + let text = ` +(module + (func $loop (export "loop") (param $n i32) (param $q i32) (param ${ps}) (result i32) + (if (result i32) (i32.eqz (local.get $n)) + (then (return (i32.add (local.get $q) ${sum}))) + (else (return_call $loop (i32.sub (local.get $n) (i32.const 1)) (i32.add (local.get $q) (i32.const 1)) ${es}))))) +`; + let ins = wasmEvalText(text); + assertEq(ins.exports.loop(TailCallIterations, ...vals), TailCallIterations + sumv); +} |