Fix the CPU feature detection.

test/cctest/test-cpu.cc

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-// Flags: --expose_gc
+#include "v8.h"
 
-p1 =  { };
-p2 =  { };
-p3 =  { x : 1 };
-p2.__proto__ = p3
-p1.__proto__ = p2
+#include "cctest.h"
+#include "cpu.h"
 
-// Normalize p1.
-p1.z = 1
-delete p1.z
+using namespace v8::internal;
 
-// Make sure all objects are in old space.
-for (var i = 0; i < 10; i++) gc();
 
-function f2() {
-  p2.x;
+TEST(FeatureImplications) {
+  // Test for features implied by other features.
+  CPU cpu;
+
+  // ia32 and x64 features
+  CHECK(!cpu.has_sse() || cpu.has_mmx());
+  CHECK(!cpu.has_sse2() || cpu.has_sse());
+  CHECK(!cpu.has_sse3() || cpu.has_sse2());
+  CHECK(!cpu.has_ssse3() || cpu.has_sse3());
+  CHECK(!cpu.has_sse41() || cpu.has_sse3());
+  CHECK(!cpu.has_sse42() || cpu.has_sse41());
+
+  // arm features
+  CHECK(!cpu.has_vfp3_d32() || cpu.has_vfp3());
 }
-
-function f1() {
-  return p1.x;
-}
-
-// Create load stub in p2.
-for (var i = 0; i < 10; i++) f2();
-
-// Create load stub in p2 for p1.
-for (var i = 0; i < 10; i++) f1();
-
-assertEquals(1, f1());
-
-p2.x = 2;
-
-assertEquals(2, f1());