Add support for keyed-call on arrays of fast elements

test/mjsunit/keyed-array-call.js

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-// Flags: --allow-natives-syntax
-// Test expressions that can be computed with a multiply-add instruction.
-
-function f(a, b, c) {
-  return a - b * c;
+var a = [function(a) { return a+10; },
+         function(a) { return a+20; }];
+a.__proto__.test = function(a) { return a+30; }
+function f(i) {
+  return "r" + (1, a[i](i+1), a[i](i+2));
 }
 
-function g(a, b, c) {
-  return a * b - c;
+assertEquals("r12", f(0));
+assertEquals("r12", f(0));
+assertEquals("r23", f(1));
+assertEquals("r23", f(1));
+
+// Deopt the stub.
+assertEquals("rtest230", f("test"));
+
+var a2 = [function(a) { return a+10; },,
+          function(a) { return a+20; }];
+a2.__proto__.test = function(a) { return a+30; }
+function f2(i) {
+  return "r" + (1, a2[i](i+1), a2[i](i+2));
 }
 
-function h(a, b, c, d) {
-  return a * b - c * d;
-}
+assertEquals("r12", f2(0));
+assertEquals("r12", f2(0));
+assertEquals("r24", f2(2));
+assertEquals("r24", f2(2));
 
-assertEquals(-5.41, f(1.1, 2.1, 3.1));
-assertEquals(-5.41, f(1.1, 2.1, 3.1));
-%OptimizeFunctionOnNextCall(f);
-assertEquals(-5.41, f(1.1, 2.1, 3.1));
-
-assertEquals(8.36, g(2.2, 3.3, -1.1));
-assertEquals(8.36, g(2.2, 3.3, -1.1));
-%OptimizeFunctionOnNextCall(g);
-assertEquals(8.36, g(2.2, 3.3, -1.1));
-
-assertEquals(-1.5, h(1.5, 3.0, 12, 0.5));
-assertEquals(-1.5, h(1.5, 3.0, 12, 0.5));
-%OptimizeFunctionOnNextCall(h);
-assertEquals(-1.5, h(1.5, 3.0, 12, 0.5));
+// Deopt the stub. This will throw given that undefined is not a function.
+assertThrows(function() { f2(1) });