Add inline non-transcendental cache version of log to lithium.

src/hydrogen.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3901 matching lines @@
 
   // No context change required.
   CompilationInfo* outer_info = info();
   if (target->context() != outer_info->closure()->context() ||
       outer_info->scope()->contains_with() ||
       outer_info->scope()->num_heap_slots() > 0) {
     TraceInline(target, "target requires context change");
     return false;
   }
 
-  // Don't inline deeper than two calls.
+  // Don't inline deeper than kMaxInliningLevels calls.
   HEnvironment* env = environment();
-  if (env->outer() != NULL && env->outer()->outer() != NULL) {
-    TraceInline(target, "inline depth limit reached");
-    return false;
+  int current_level = 1;
+  while (env->outer() != NULL) {
+    if (current_level == Compiler::kMaxInliningLevels) {
+      TraceInline(target, "inline depth limit reached");
+      return false;
+    }
+    current_level++;
+    env = env->outer();
   }
 
   // Don't inline recursive functions.
   if (target->shared() == outer_info->closure()->shared()) {
     TraceInline(target, "target is recursive");
     return false;
   }
 
   // We don't want to add more than a certain number of nodes from inlining.
   if (FLAG_limit_inlining && inlined_count_ > kMaxInlinedNodes) {
@@ skipping 2014 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal