Prevent deopt on double value assignment to typed arrays

test/mjsunit/external-array.js

Index: test/mjsunit/external-array.js
diff --git a/test/mjsunit/external-array.js b/test/mjsunit/external-array.js
index 32b2c0cddb979e822fcf9be76fab276525bce30a..94105ec9d4b76d271605bd066b3593b33db48987 100644
--- a/test/mjsunit/external-array.js
+++ b/test/mjsunit/external-array.js
@@ -87,8 +87,10 @@ types = [Array, Int8Array, Uint8Array, Int16Array, Uint16Array, Int32Array,
 
 test_result_nan = [NaN, 0, 0, 0, 0, 0, 0, 0, NaN, NaN];
 test_result_low_int = [-1, -1, 255, -1, 65535, -1, 0xFFFFFFFF, 0, -1, -1];
+test_result_low_double = [-1.25, -1, 255, -1, 65535, -1, 0xFFFFFFFF, 0, -1.25, -1.25];
 test_result_middle = [253.75, -3, 253, 253, 253, 253, 253, 254, 253.75, 253.75];
 test_result_high_int = [256, 0, 0, 256, 256, 256, 256, 255, 256, 256];
+test_result_high_double = [256.25, 0, 0, 256, 256, 256, 256, 255, 256.25, 256.25];
 
 const kElementCount = 40;
 
@@ -120,15 +122,27 @@ function test_store_const_key(array, sum) {
   return sum;
 }
 
+function zero() {
+  return 0.0;
+}
 
-function test_store_middle_double(array, sum) {
+function test_store_middle_tagged(array, sum) {
   array[0] = 253.75;
   return array[0];
 }
 
+function test_store_high_tagged(array, sum) {
+  array[0] = 256.25;
+  return array[0];
+}
+
+function test_store_middle_double(array, sum) {
+  array[0] = 253.75 + zero(); // + forces double type feedback
+  return array[0];
+}
 
 function test_store_high_double(array, sum) {
-  array[0] = 256.25;
+  array[0] = 256.25 + zero(); // + forces double type feedback
   return array[0];
 }
 
@@ -142,6 +156,16 @@ function test_store_low_int(array, sum) {
   return array[0];
 }
 
+function test_store_low_tagged(array, sum) {
+  array[0] = -1.25;
+  return array[0];
+}
+
+function test_store_low_double(array, sum) {
+  array[0] = -1.25 + zero(); // + forces double type feedback
+  return array[0];
+}
+
 function test_store_high_int(array, sum) {
   array[0] = 256;
   return array[0];
@@ -168,7 +192,6 @@ function run_test(test_func, array, expected_result) {
 
 for (var t = 0; t < types.length; t++) {
   var type = types[t];
-  print ("type = " + t);
   var a = new type(kElementCount);
   for (var i = 0; i < kElementCount; i++) {
     a[i] = i;
@@ -180,9 +203,14 @@ for (var t = 0; t < types.length; t++) {
   run_test(test_store, a, 820 * kRuns);
   run_test(test_store_const_key, a, 6 * kRuns);
   run_test(test_store_low_int, a, test_result_low_int[t]);
+  run_test(test_store_low_double, a, test_result_low_double[t]);
+  run_test(test_store_low_tagged, a, test_result_low_double[t]);
   run_test(test_store_high_int, a, test_result_high_int[t]);
   run_test(test_store_nan, a, test_result_nan[t]);
   run_test(test_store_middle_double, a, test_result_middle[t]);
+  run_test(test_store_middle_tagged, a, test_result_middle[t]);
+  run_test(test_store_high_double, a, test_result_high_double[t]);
+  run_test(test_store_high_tagged, a, test_result_high_double[t]);
 
   // Test the correct behavior of the |length| property (which is read-only).
   if (t != 0) {