Print LLVM passes time consumption.

Change-Id: I592b843da83acefb5b397e07565406254081d3df

1 files changed, 9 insertions, 0 deletions

diff --git a/src/compiler_llvm/compiler_llvm.cc b/src/compiler_llvm/compiler_llvm.cc
index 1edbd46df2..c94e7ea36d 100644
--- a/src/compiler_llvm/compiler_llvm.cc
+++ b/src/compiler_llvm/compiler_llvm.cc
@@ -27,15 +27,23 @@
 
 #include <llvm/LinkAllPasses.h>
 #include <llvm/LinkAllVMCore.h>
+#include <llvm/Support/ManagedStatic.h>
 #include <llvm/Support/TargetSelect.h>
 #include <llvm/Support/Threading.h>
 
+namespace llvm {
+  extern bool TimePassesIsEnabled;
+}
+
 
 namespace {
 
 pthread_once_t llvm_initialized = PTHREAD_ONCE_INIT;
 
 void InitializeLLVM() {
+  // NOTE: Uncomment following line to show the time consumption of LLVM passes
+  //llvm::TimePassesIsEnabled = true;
+
   // Initialize LLVM target, MC subsystem, asm printer, and asm parser
   llvm::InitializeAllTargets();
   llvm::InitializeAllTargetMCs();
@@ -81,6 +89,7 @@ CompilerLLVM::CompilerLLVM(Compiler* compiler, InstructionSet insn_set)
 
 CompilerLLVM::~CompilerLLVM() {
   STLDeleteElements(&cunits_);
+  llvm::llvm_shutdown();
 }