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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/lexical-check-6.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/ion/lexical-check-6.js')
-rw-r--r--js/src/jit-test/tests/ion/lexical-check-6.js39
1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/lexical-check-6.js b/js/src/jit-test/tests/ion/lexical-check-6.js
new file mode 100644
index 0000000000..5af7686aee
--- /dev/null
+++ b/js/src/jit-test/tests/ion/lexical-check-6.js
@@ -0,0 +1,39 @@
+// This function uses UCE to test when the if branch is removed by
+// IonMonkey. Some optimization such as Scalar Replacement are able to remove
+// the scope chain, which can cause issues when the scope chain properties are
+// not initialized properly.
+var uceFault = function (i) {
+ if (i % 1500 == 0) {
+ uceFault = function (i) { return i % 1500 == 0; };
+ }
+ return false;
+};
+
+function f(i) {
+ if (uceFault(i) || uceFault(i))
+ g();
+ const x = 42;
+ function g() {
+ return x;
+ }
+ return g;
+}
+
+function loop() {
+ for (; i < 4000; i++)
+ assertEq(f(i)(), 42);
+}
+
+var caught = 0;
+var i = 1;
+while (i < 4000) {
+ try {
+ loop();
+ } catch(e) {
+ assertEq(e instanceof ReferenceError, true);
+ assertEq(i == 1500 || i == 3000, true);
+ caught += 1;
+ i++;
+ }
+}
+assertEq(caught, 2);