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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/cacheir/arguments-iterator-mapped.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>
Diffstat (limited to 'js/src/jit-test/tests/cacheir/arguments-iterator-mapped.js')
-rw-r--r--js/src/jit-test/tests/cacheir/arguments-iterator-mapped.js171
1 files changed, 171 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/arguments-iterator-mapped.js b/js/src/jit-test/tests/cacheir/arguments-iterator-mapped.js
new file mode 100644
index 0000000000..0b6024d9af
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/arguments-iterator-mapped.js
@@ -0,0 +1,171 @@
+// Test iteration with a mapped arguments object.
+
+function simple() {
+ function f() {
+ var sum = 0;
+ for (var v of arguments) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ for (var i = 0; i < 100; ++i) {
+ assertEq(f(1, 2, 3), 6);
+ }
+}
+simple();
+
+function spreadCall() {
+ function f() {
+ var sum = 0;
+ for (var v of arguments) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ function g() {
+ return f(...arguments);
+ }
+
+ for (var i = 0; i < 100; ++i) {
+ assertEq(g(1, 2, 3), 6);
+ }
+}
+spreadCall();
+
+function spreadArray() {
+ function f() {
+ var arr = [...arguments];
+ var sum = 0;
+ for (var v of arr) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ for (var i = 0; i < 100; ++i) {
+ assertEq(f(1, 2, 3), 6);
+ }
+}
+spreadArray();
+
+function reifyIterator() {
+ var reify = false;
+ function f() {
+ if (reify) {
+ // Redefining any property attributes will reify the iterator property.
+ Object.defineProperty(arguments, Symbol.iterator, {
+ writable: false
+ });
+ }
+
+ var sum = 0;
+ for (var v of arguments) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ for (var i = 0; i <= 100; ++i) {
+ reify = i >= 50;
+ assertEq(f(1, 2, 3), 6);
+ }
+}
+reifyIterator();
+
+function overwriteIterator() {
+ var callCount = 0;
+ function Iterator() {
+ callCount += 1;
+ return Array.prototype[Symbol.iterator].call(this);
+ }
+
+ var overwrite = false;
+ function f() {
+ if (overwrite) {
+ arguments[Symbol.iterator] = Iterator;
+ }
+
+ var sum = 0;
+ for (var v of arguments) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ for (var i = 0; i <= 100; ++i) {
+ overwrite = i > 50;
+ assertEq(f(1, 2, 3), 6);
+ }
+ assertEq(callCount, 50);
+}
+overwriteIterator();
+
+function deleteIterator() {
+ var remove = false;
+ function f() {
+ // Deleting Symbol.iterator won't change the shape of the arguments object.
+ // That's why we need to use a separate guard instruction to check if the
+ // iterator property was modified.
+ if (remove) {
+ delete arguments[Symbol.iterator];
+ }
+
+ var sum = 0;
+ for (var v of arguments) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ var error;
+ try {
+ for (var i = 0; i <= 100; ++i) {
+ remove = i === 100;
+ assertEq(f(1, 2, 3), 6);
+ }
+ } catch (e) {
+ error = e;
+ }
+ assertEq(error instanceof TypeError, true);
+}
+deleteIterator();
+
+function deleteIteratorInherit() {
+ var callCount = 0;
+ function Iterator() {
+ callCount += 1;
+ return Array.prototype[Symbol.iterator].call(this);
+ }
+
+ Object.prototype[Symbol.iterator] = Iterator;
+
+ var remove = false;
+ function f() {
+ // Deleting Symbol.iterator won't change the shape of the arguments object.
+ // That's why we need to use a separate guard instruction to check if the
+ // iterator property was modified.
+ if (remove) {
+ delete arguments[Symbol.iterator];
+ }
+
+ var sum = 0;
+ for (var v of arguments) {
+ sum += v;
+ }
+ return sum;
+ }
+
+ for (var i = 0; i <= 100; ++i) {
+ remove = i === 100;
+ assertEq(f(1, 2, 3), 6);
+ }
+ assertEq(callCount, 1);
+
+ delete Object.prototype[Symbol.iterator];
+}
+deleteIteratorInherit();
+
+// Don't add tests below this point because |Object.prototype[Symbol.iterator]|
+// was modified, which may lead to engine-wide deoptimisations.