Delete HAbnormalExit. It does more harm than good.

test/mjsunit/regress/regress-2843.js

Index: test/mjsunit/regress/regress-2843.js
diff --git a/test/mjsunit/regress/regress-2813.js b/test/mjsunit/regress/regress-2843.js
similarity index 82%
copy from test/mjsunit/regress/regress-2813.js
copy to test/mjsunit/regress/regress-2843.js
index 97ae43b316a2177596927cf5465fa2214cc11c61..5b28c2d7948ee5b71f2cc072aea326057f8156db 100644
--- a/test/mjsunit/regress/regress-2813.js
+++ b/test/mjsunit/regress/regress-2843.js
@@ -27,18 +27,19 @@
 
 // Flags: --allow-natives-syntax
 
-function foo(x) {
+function bailout() { throw "bailout"; }
+var global;
+
+function foo(x, fun) {
   var a = x + 1;
-  var b = x + 2;
-  if (x != 0) {
-    if (x > 0 & x < 100) {
-      return a;
-    }
-  }
-  return 0;
+  var b = x + 2;  // Need another Simulate to fold the first one into.
+  global = true;  // Need a side effect to deopt to.
+  fun();
+  return a;
 }
 
-assertEquals(0, foo(0));
-assertEquals(0, foo(0));
+assertThrows("foo(1, bailout)");
+assertThrows("foo(1, bailout)");
 %OptimizeFunctionOnNextCall(foo);
-assertEquals(3, foo(2));
+assertThrows("foo(1, bailout)");
+assertEquals(2, foo(1, function() {}));