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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /js/src/jit-test/tests/ion/spreadcall-not-optimized-dynamic-4a.js
parentInitial commit. (diff)
downloadfirefox-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>
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+// 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 arguments don't share a common prototype.
+function test() {
+ class MyArray1 extends Array { }
+ class MyArray2 extends Array { }
+ 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) {
+ if (i & 1)
+ rest = new MyArray1(3, 4);
+ else
+ rest = new MyArray2(5, 6);
+ }
+ return rest;
+ }
+ function fn(...rest) {
+ rest = maybeInvalidate(rest);
+ return add(...rest);
+ }
+ for (var i = 0; i < 4000; ++i) {
+ assertEq(fn(1, 2), i < 1900 ? 3 : (i & 1) ? 7 : 11);
+ }
+}
+test();