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-rw-r--r--js/src/jit-test/tests/warp/conditional-test-undefined-1.js22
1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/conditional-test-undefined-1.js b/js/src/jit-test/tests/warp/conditional-test-undefined-1.js
new file mode 100644
index 0000000000..382f3ca966
--- /dev/null
+++ b/js/src/jit-test/tests/warp/conditional-test-undefined-1.js
@@ -0,0 +1,22 @@
+function g(array) {
+ // 1. Absent properties return |undefined| from CacheIR.
+ // 2. Tests on |undefined| are changed to |false| in CacheIR.
+ //
+ // When Warp compiling the CacheIR ops, the first test will then happen on
+ // a boolean, whereas the phi still sees the original undefined value.
+ if (array.does_not_exist || array.slice) {
+ return 1;
+ }
+ return 0;
+}
+
+function f() {
+ var array = [];
+ var r = 0;
+ for (let i = 0; i < 100; ++i) {
+ r += g(array);
+ }
+ assertEq(r, 100);
+}
+
+for (let i = 0; i < 2; ++i) f(); \ No newline at end of file