Vector ICs: Introduce an InstanceType for the type feedback vector.

test/mjsunit/compiler/stubs/floor-stub.js

Index: test/mjsunit/compiler/stubs/floor-stub.js
diff --git a/test/mjsunit/compiler/stubs/floor-stub.js b/test/mjsunit/compiler/stubs/floor-stub.js
index e3fc9b6003f6c1f8b59f565fe1a5b74f9f2c4d2a..fd19f132c06d19f6e445944b6554631700c6ef19 100644
--- a/test/mjsunit/compiler/stubs/floor-stub.js
+++ b/test/mjsunit/compiler/stubs/floor-stub.js
@@ -46,7 +46,8 @@ const kFirstSlotExtraTypeFeedbackIndex = 5;
                             kFirstSlotExtraTypeFeedbackIndex));
   // Executing floor such that it returns -0 should set the proper sentinel in
   // the feedback vector.
-  assertEquals(-Infinity, 1/stub(floorFunc, 4, -0));
+  var answer = stub(floorFunc, 4, -0);
+  assertEquals(-Infinity, 1/answer);
   assertEquals(kExtraTypeFeedbackMinusZeroSentinel,
                %FixedArrayGet(%GetTypeFeedbackVector(floorFunc),
                               kFirstSlotExtraTypeFeedbackIndex));