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-rw-r--r--js/src/jit-test/tests/ion/range-analysis.js35
1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/range-analysis.js b/js/src/jit-test/tests/ion/range-analysis.js
new file mode 100644
index 000000000..86f441913
--- /dev/null
+++ b/js/src/jit-test/tests/ion/range-analysis.js
@@ -0,0 +1,35 @@
+// |jit-test|
+
+// Only fails with Ion.
+function add_xors_1() {
+ var res = 0;
+ var step = 4;
+ for (var i = 0x7fffffff | 0; i >= (1 << step); i -= (i >> step)) {
+ var x = i ^ (i << 1);
+ res += (((x + x) + res + res) | 0);
+ }
+ return res;
+}
+
+var r1 = add_xors_1();
+for (var i = 0; i < 100; i++) {
+ var r2 = add_xors_1();
+ assertEq(r2, r1);
+}
+
+// Only fails with JM
+function add_xors_2() {
+ var res = 0;
+ var step = 4;
+ for (var i = 0x7fffffff | 0; i >= (1 << step); i -= (i >> step)) {
+ var x = i ^ (i << 1);
+ res += ((x + x) + res + res) | 0;
+ }
+ return res;
+}
+
+var r1 = add_xors_2();
+for (var i = 0; i < 100; i++) {
+ var r2 = add_xors_2();
+ assertEq(r1, r2);
+}