1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/truncate.js b/js/src/jit-test/tests/ion/truncate.js
new file mode 100644
index 0000000000..3f4d353ac0
--- /dev/null
+++ b/js/src/jit-test/tests/ion/truncate.js
@@ -0,0 +1,28 @@
+function f() {
+    var x = Math.pow(2, 31); // take it as argument if constant propagation comes in you way.
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 32
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 33
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 34
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 35
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 36
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 37
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 38
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 39
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 40
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 41
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 42
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 43
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 44
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 45
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 46
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 47
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 48
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 49
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 50
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 51
+    x = x + x; assertEq((x + 1) | 0, 1); // 2 ** 52
+    x = x + x; assertEq((x + 1) | 0, 0); // 2 ** 53
+}
+
+for (var i = 0; i <= 10_000; i++)
+    f();