Store doubles before calling into the elements transition stub on ARM

test/mjsunit/regress/regress-et-clobbers-doubles.js

Index: test/mjsunit/regress/regress-et-clobbers-doubles.js
diff --git a/test/mjsunit/compare-nil.js b/test/mjsunit/regress/regress-et-clobbers-doubles.js
similarity index 90%
copy from test/mjsunit/compare-nil.js
copy to test/mjsunit/regress/regress-et-clobbers-doubles.js
index 0895a31fb80cbe697b678eaa1005926d7d65829f..47fa47925fe48f8a339a807f7cf73ee40f35d29c 100644
--- a/test/mjsunit/compare-nil.js
+++ b/test/mjsunit/regress/regress-et-clobbers-doubles.js
@@ -26,11 +26,14 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --allow-natives-syntax
-
-function test(v) {
-  return (v == null);
+function t_smi(a) {
+  a[0] = 1.5;
 }
-assertFalse(test(true));
-assertFalse(test(true));
-assertTrue(test(null));
-assertTrue(test(null));
+
+t_smi([1,,3]);
+t_smi([1,,3]);
+t_smi([1,,3]);
+%OptimizeFunctionOnNextCall(t_smi);
+var ta = [1,,3];
+t_smi(ta);
+assertEquals([1.5,,3], ta);