[turbofan] First shot at eager deoptimization in Turbofan.

test/mjsunit/compiler/eager-deopt-simple.js

Index: test/mjsunit/compiler/eager-deopt-simple.js
diff --git a/test/mjsunit/regress/regress-449291.js b/test/mjsunit/compiler/eager-deopt-simple.js
similarity index 71%
copy from test/mjsunit/regress/regress-449291.js
copy to test/mjsunit/compiler/eager-deopt-simple.js
index fb56027b67f3f176f1432c11b39075aec6cc8429..72ca317a50a7cb8656f61ac3b2479ae32300afbb 100644
--- a/test/mjsunit/regress/regress-449291.js
+++ b/test/mjsunit/compiler/eager-deopt-simple.js
@@ -4,16 +4,15 @@
 
 // Flags: --allow-natives-syntax
 
-a = {y:1.5};
-a.y = 1093445778;
-b = a.y;
-c = {y:{}};
+function g(a, b, c) {
+  return a + b + c;
+}
 
 function f() {
-  return {y: b};
+  return g(1, (%DeoptimizeNow(), 2), 3);
 }
 
 f();
 f();
 %OptimizeFunctionOnNextCall(f);
-assertEquals(f().y, 1093445778);
+assertEquals(6, f());