From 7d4c87ef6eea424b7a28392ea11137ed77b44b57 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Tue, 17 Jan 2012 20:51:32 +0000
Subject: [PATCH] Add a new PassManagerBuilder customization point,
 EP_ModuleOptimizerEarly, to allow passes to be added before the main
 ModulePass optimizers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148329 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Transforms/IPO/PassManagerBuilder.h | 4 ++++
 lib/Transforms/IPO/PassManagerBuilder.cpp        | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/include/llvm/Transforms/IPO/PassManagerBuilder.h b/include/llvm/Transforms/IPO/PassManagerBuilder.h
index d265bdac496..b4ba1847816 100644
--- a/include/llvm/Transforms/IPO/PassManagerBuilder.h
+++ b/include/llvm/Transforms/IPO/PassManagerBuilder.h
@@ -60,6 +60,10 @@ public:
     /// out of the frontend.
     EP_EarlyAsPossible,
 
+    /// EP_ModuleOptimizerEarly - This extension point allows adding passes
+    /// just before the main module-level optimization passes.
+    EP_ModuleOptimizerEarly,
+
     /// EP_LoopOptimizerEnd - This extension point allows adding loop passes to
     /// the end of the loop optimizer.
     EP_LoopOptimizerEnd,
diff --git a/lib/Transforms/IPO/PassManagerBuilder.cpp b/lib/Transforms/IPO/PassManagerBuilder.cpp
index f63f532101b..afd25dc317d 100644
--- a/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -110,6 +110,8 @@ void PassManagerBuilder::populateModulePassManager(PassManagerBase &MPM) {
   addInitialAliasAnalysisPasses(MPM);
 
   if (!DisableUnitAtATime) {
+    addExtensionsToPM(EP_ModuleOptimizerEarly, MPM);
+
     MPM.add(createGlobalOptimizerPass());     // Optimize out global vars
 
     MPM.add(createIPSCCPPass());              // IP SCCP