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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/jit-test/tests/ion/spreadcall-not-optimized-dynamic-3.js | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/jit-test/tests/ion/spreadcall-not-optimized-dynamic-3.js | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/spreadcall-not-optimized-dynamic-3.js b/js/src/jit-test/tests/ion/spreadcall-not-optimized-dynamic-3.js new file mode 100644 index 0000000000..e7a136f41e --- /dev/null +++ b/js/src/jit-test/tests/ion/spreadcall-not-optimized-dynamic-3.js @@ -0,0 +1,40 @@ +// Tests when JSOP_OPTIMIZE_SPREADCALL no longer apply after the initial Ion +// compilation. + +// JSOP_OPTIMIZE_SPREADCALL can be optimised when the following conditions +// are fulfilled: +// (1) the argument is an array +// (2) the array has no hole +// (3) array[@@iterator] is not modified +// (4) the array's prototype is Array.prototype +// (5) Array.prototype[@@iterator] is not modified +// (6) %ArrayIteratorPrototype%.next is not modified + +function add(a, b) { + return a + b; +} + +// The rest argument has an own @@iterator property. +function test() { + function MyIter() { + return [3, 4][Symbol.iterator](); + } + function maybeInvalidate(rest) { + // Use a WithStatement to prevent Ion-inlining. This ensures any + // bailouts due to type changes don't occur in this function, but + // instead in the caller. + with ({}); + + if (i >= 1900) { + rest[Symbol.iterator] = MyIter; + } + } + function fn(...rest) { + maybeInvalidate(rest); + return add(...rest); + } + for (var i = 0; i < 4000; ++i) { + assertEq(fn(1, 2), i < 1900 ? 3 : 7); + } +} +test(); |