[turbofan] Fix bug in OSR deconstruction.

test/mjsunit/compiler/osr-labeled.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --use-osr --turbo-osr
+
+function foo() {
+  var sum = 0;
+  A: for (var i = 0; i < 5; i++) {
+    B: for (var j = 0; j < 5; j++) {
+      C: for (var k = 0; k < 10; k++) {
+        if (k === 5) %OptimizeOsr();
+        if (k === 6) break B;
+        sum++;
+      }
+    }
+  }
+  return sum;
+}
+
+assertEquals(30, foo());
+assertEquals(30, foo());
+
+function bar(a) {
+  var sum = 0;
+  A: for (var i = 0; i < 5; i++) {
+    B: for (var j = 0; j < 5; j++) {
+      C: for (var k = 0; k < 10; k++) {
+        sum++;
+        %OptimizeOsr();
+        if (a === 1) break A;
+        if (a === 2) break B;
+        if (a === 3) break C;
+      }
+    }
+  }
+  return sum;
+}
+
+assertEquals(1, bar(1));
+assertEquals(1, bar(1));
+
+assertEquals(5, bar(2));
+assertEquals(5, bar(2));
+
+assertEquals(25, bar(3));
+assertEquals(25, bar(3));