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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/string-loadchar.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/string-loadchar.js')
-rw-r--r--js/src/jit-test/tests/cacheir/string-loadchar.js44
1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/cacheir/string-loadchar.js b/js/src/jit-test/tests/cacheir/string-loadchar.js
new file mode 100644
index 0000000000..f89c1d8b33
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/string-loadchar.js
@@ -0,0 +1,44 @@
+// Load Latin-1 and Two-Byte strings.
+function latin1AndTwoByte() {
+ for (var i = 0; i <= 0x03FF; ++i) {
+ var s = String.fromCodePoint(i);
+ assertEq(s[0], s);
+ assertEq(s.charAt(0), s);
+ }
+}
+
+for (var i = 0; i < 2; ++i) {
+ latin1AndTwoByte();
+}
+
+// Test bi-morphic loads.
+function stringAndArray() {
+ var xs = [["\u0100"], "\u0100"];
+ for (var i = 0; i < 200; ++i) {
+ var x = xs[i & 1];
+ var s = x[0];
+ assertEq(s.length, 1);
+ assertEq(s, "\u0100");
+ }
+}
+
+for (var i = 0; i < 2; ++i) {
+ stringAndArray();
+}
+
+function outOfBoundsFailureThenException() {
+ var name = "Object";
+
+ var j = 0;
+ while (true) {
+ // Access out-of-bounds character and then trigger an exception,
+ // when accessing a property on the undefined value.
+ name[j++].does_not_exist;
+ }
+}
+
+for (var i = 0; i < 2; ++i) {
+ try {
+ outOfBoundsFailureThenException();
+ } catch {}
+}