Reland "Optimize function across closures." (again).

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 810a2fdd520d26e0d636e97ee470681210f293ac..9a8eaf1dac476c6e5d51b70f7e14c37140f57fd2 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -6121,6 +6121,18 @@ class HObjectAccess FINAL {
                          SharedFunctionInfo::kOptimizedCodeMapOffset);
   }
 
+  static HObjectAccess ForCompileHint() {
+// Compile hints are stored in the upper half of a pseudo-smi, which for
+// 64-bit means that the representation is an integer.
+#if V8_HOST_ARCH_32_BIT
+    Representation repr = Representation::Smi();
+#else
+    Representation repr = Representation::Integer32();
+#endif
+    return HObjectAccess(kInobject, SharedFunctionInfo::kCompilerHintsOffset,
+                         repr);
+  }
+
   static HObjectAccess ForFunctionContextPointer() {
     return HObjectAccess(kInobject, JSFunction::kContextOffset);
   }