Merge pull request #1278 from kmod/refcounter_opt

Optimize the llvm refcounter pass

microbenchmarks/large_import_bench.py

+import re
+import os
+import sre_compile
+import weakref
+import threading
+import abc
+import _abcoll
+import collections
+import multiprocessing
+import argparse
+import bisect
+import heapq
+import inspect
+import netrc
+import pickle
+import socket

src/codegen/opt/inliner.cpp

@@ -249,7 +249,7 @@ public:
                     do_inline = (bool)IC;
                 }
 
-                if (VERBOSITY("irgen.inlining") >= 1) {
+                if (VERBOSITY("irgen.inlining") >= 2) {
                     if (!do_inline)
                         llvm::outs() << "not ";
                     llvm::outs() << "inlining ";