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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /js/src/jit-test/tests/wasm/tail-calls/litmus10.js | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/jit-test/tests/wasm/tail-calls/litmus10.js')
-rw-r--r-- | js/src/jit-test/tests/wasm/tail-calls/litmus10.js | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/tail-calls/litmus10.js b/js/src/jit-test/tests/wasm/tail-calls/litmus10.js new file mode 100644 index 0000000000..8ef83f1336 --- /dev/null +++ b/js/src/jit-test/tests/wasm/tail-calls/litmus10.js @@ -0,0 +1,59 @@ +// |jit-test| skip-if: !wasmTailCallsEnabled() + +// Tail-call litmus test with multiple results +// +// Mutually recursive functions implement a multi-entry loop using indirect +// cross-module tail calls. The functions do not have the same signatures, so +// if all arguments are stack arguments then these use different amounts of +// stack space. +// +// Cross-module mutual recursion must be set up by JS, which is a bit of hair. +// But this should not destroy the ability to tail-call. +// +// The mutable globals accessed after the call are there to attempt to ensure +// that the correct instance is restored after the chain of tail calls. + +var table = new WebAssembly.Table({initial:2, maximum:2, element:"funcref"}) + +var odd_cookie = 24680246; +var oddins = wasmEvalText(` +(module + (table (import "" "table") 2 2 funcref) + (type $even_t (func (param i32) (result i32 i32 i32))) + (global $glob (export "g") (mut i32) (i32.const ${odd_cookie})) + + (func $odd_entry (export "odd_entry") (param $n i32) (result i32 i32 i32 i32) + (call $odd (local.get $n) (i32.const 86)) + (global.get $glob)) + + (func $odd (export "odd") (param $n i32) (param $dummy i32) (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))))))`, + {"":{table}}); + +var even_cookie = 12345678; +var evenins = wasmEvalText(` +(module + (table (import "" "table") 2 2 funcref) + (type $odd_t (func (param i32 i32) (result i32 i32 i32))) + (global $glob (export "g") (mut i32) (i32.const ${even_cookie})) + + (func $even_entry (export "even_entry") (param $n i32) (result i32 i32 i32 i32) + (call $even (local.get $n)) + (global.get $glob)) + + (func $even (export "even") (param $n i32) (result i32 i32 i32) + (if (result i32 i32 i32) (i32.eqz (local.get $n)) + (then (return (i32.const 1) (i32.const -17) (i32.const 44021))) + (else (return_call_indirect (type $odd_t) (i32.sub (local.get $n) (i32.const 1)) (i32.const 33) (i32.const 1))))))`, + {"":{table}}); + + +table.set(0, evenins.exports.even); +table.set(1, oddins.exports.odd); + +assertSame(evenins.exports.even_entry(TailCallIterations), [1, -17, 44021, even_cookie]); +assertSame(oddins.exports.odd_entry(TailCallIterations+1, 33), [1, -17, 44021, odd_cookie]); +assertSame(evenins.exports.even_entry(TailCallIterations+1), [0, 32769, -37, even_cookie]); +assertSame(oddins.exports.odd_entry(TailCallIterations, 33), [0, 32769, -37, odd_cookie]); |