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-rw-r--r--js/src/jit-test/tests/atomics/inline-cmpxchg.js31
1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/atomics/inline-cmpxchg.js b/js/src/jit-test/tests/atomics/inline-cmpxchg.js
new file mode 100644
index 000000000..ddec40644
--- /dev/null
+++ b/js/src/jit-test/tests/atomics/inline-cmpxchg.js
@@ -0,0 +1,31 @@
+// |jit-test| slow;
+//
+// This is intended to be run manually with IONFLAGS=logs and
+// postprocessing by iongraph to verify manually (by inspecting the
+// MIR) that:
+//
+// - the cmpxchg operation is inlined as it should be
+// - loads and stores are not moved across the cmpxchg
+//
+// Be sure to run with --ion-eager --ion-offthread-compile=off.
+
+function cmpxchg(ta) {
+ var x = ta[0];
+ Atomics.compareExchange(ta, 86, 37, 42);
+ var y = ta[1];
+ var z = y + 1;
+ var w = x + z;
+ return w;
+}
+
+if (!this.SharedArrayBuffer || !this.Atomics)
+ quit(0);
+
+var sab = new SharedArrayBuffer(4096);
+var ia = new Int32Array(sab);
+for ( var i=0, limit=ia.length ; i < limit ; i++ )
+ ia[i] = 37;
+var v = 0;
+for ( var i=0 ; i < 1000 ; i++ )
+ v += cmpxchg(ia);
+//print(v);