commit e4c2ccceb57114d6745b74f18d8748591692b532
author TDYa127 <tdy@google.com> Sun May 13 21:10:36 2012 -0700
committer Shih-wei Liao <sliao@google.com> Mon May 14 14:43:39 2012 -0700
tree ee09736b8dadd8a484fe0a617c4b7f0cbb2753b0
parent 1d7e510d90369b10aae8704ec71a9964d76dd402

Reduce compilation time.

This change will decrease run-time performance by 5%. But it can
decrease the compilation time by 20%.

Change-Id: I9981f896e56aa2119a2b33730a54a8f4420d3d83

src/compiler_llvm/compilation_unit.cc

diff --git a/src/compiler_llvm/compilation_unit.cc b/src/compiler_llvm/compilation_unit.cc
index f11fdaf..fbd2f05 100644
--- a/src/compiler_llvm/compilation_unit.cc
+++ b/src/compiler_llvm/compilation_unit.cc
@@ -381,7 +381,7 @@
   llvm::OwningPtr<llvm::TargetMachine> target_machine(
     target->createTargetMachine(target_triple, "", target_attr, target_options,
                                 llvm::Reloc::Static, llvm::CodeModel::Small,
-                                llvm::CodeGenOpt::Aggressive));
+                                llvm::CodeGenOpt::Less));
 
   CHECK(target_machine.get() != NULL) << "Failed to create target machine";
 
@@ -436,6 +436,7 @@
   //pm_builder.Inliner = llvm::createPartialInliningPass();
   pm_builder.OptLevel = 3;
   pm_builder.DisableSimplifyLibCalls = 1;
+  pm_builder.DisableUnitAtATime = 1;
   pm_builder.populateModulePassManager(pm);
   pm_builder.populateFunctionPassManager(fpm);