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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/jit-test/tests/ion/spreadcall-not-optimized-static-5b.js
parentInitial commit. (diff)
downloadfirefox-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>
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+// Tests when JSOP_OPTIMIZE_SPREADCALL can't be applied during 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;
+}
+
+// Array.prototype[@@iterator] was modified.
+function test() {
+ var ArrayPrototypeIterator = Array.prototype[Symbol.iterator];
+ Array.prototype[Symbol.iterator] = function() {
+ return ArrayPrototypeIterator.call([3, 4]);
+ };
+ function fn(...rest) {
+ return add(...rest);
+ }
+ for (var i = 0; i < 2000; ++i) {
+ assertEq(fn(1, 2), 7);
+ }
+}
+test();