Cache template literal callSiteObj

test/mjsunit/harmony/templates.js

Index: test/mjsunit/harmony/templates.js
diff --git a/test/mjsunit/harmony/templates.js b/test/mjsunit/harmony/templates.js
index 15ad9e92ca889762ce125cf05a3c811fad92a5f2..d86d26312e88d5dab65b4a7303de1538ea43d255 100644
--- a/test/mjsunit/harmony/templates.js
+++ b/test/mjsunit/harmony/templates.js
@@ -330,6 +330,43 @@ var obj = {
 })();
 
 
+(function testCallSiteCaching() {
+  var callSites = [];
+  function tag(cs) { callSites.push(cs); }
+  var a = 1;
+  var b = 2;
+
+  tag`head${a}tail`;
+  tag`head${b}tail`;
+
+  assertEquals(2, callSites.length);
+  assertSame(callSites[0], callSites[1]);
+
+  eval("tag`head${a}tail`");
+  assertEquals(3, callSites.length);
+  assertSame(callSites[1], callSites[2]);
+
+  eval("tag`head${b}tail`");
+  assertEquals(4, callSites.length);
+  assertSame(callSites[2], callSites[3]);
+
+  (new Function("tag", "a", "b", "return tag`head${a}tail`;"))(tag, 1, 2);
+  assertEquals(5, callSites.length);
+  assertSame(callSites[3], callSites[4]);
+
+  (new Function("tag", "a", "b", "return tag`head${b}tail`;"))(tag, 1, 2);
+  assertEquals(6, callSites.length);
+  assertSame(callSites[4], callSites[5]);
+
+  callSites = [];
+
+  tag`foo${a}bar`;
+  tag`foo\${.}bar`;
+  assertEquals(2, callSites[0].length);
+  assertEquals(1, callSites[1].length);
+})();

[arv (Not doing code reviews), 2014/11/19 06:09:11]

Maybe a test that has same values in the array but different values in the raw
arrays?

+
+
 (function testExtendedArrayPrototype() {
   Object.defineProperty(Array.prototype, 0, {
     set: function() {