Add a new PassManagerBuilder customization point,

EP_ModuleOptimizerEarly, to allow passes to be added before the
main ModulePass optimizers.

llvm-svn: 148329

2 files changed, 6 insertions, 0 deletions

diff --git a/llvm/include/llvm/Transforms/IPO/PassManagerBuilder.h b/llvm/include/llvm/Transforms/IPO/PassManagerBuilder.h
index d265bdac496..b4ba1847816 100644
--- a/llvm/include/llvm/Transforms/IPO/PassManagerBuilder.h
+++ b/llvm/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/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
index f63f532101b..afd25dc317d 100644
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/llvm/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