LTO: add API to set strategy for -internalize

[oota-llvm.git] / lib / Transforms / IPO / Internalize.cpp

diff --git a/lib/Transforms/IPO/Internalize.cpp b/lib/Transforms/IPO/Internalize.cpp
index dae69ce09156d101f27edec25dad50c6958e6f75..775ca9685183fbf58f4f13ae282cfffdd0e4a698 100644 (file)
--- a/lib/Transforms/IPO/Internalize.cpp
+++ b/lib/Transforms/IPO/Internalize.cpp
@@ -54,10 +54,11 @@ APIList("internalize-public-api-list", cl::value_desc("list"),
 namespace {
   class InternalizePass : public ModulePass {
     std::set<std::string> ExternalNames;
+    bool OnlyHidden;
   public:
     static char ID; // Pass identification, replacement for typeid
-    explicit InternalizePass();
-    explicit InternalizePass(ArrayRef<const char *> ExportList);
+    explicit InternalizePass(bool OnlyHidden = false);
+    explicit InternalizePass(ArrayRef<const char *> ExportList, bool OnlyHidden);
     void LoadFile(const char *Filename);
     virtual bool runOnModule(Module &M);
 
@@ -72,16 +73,17 @@ char InternalizePass::ID = 0;
 INITIALIZE_PASS(InternalizePass, "internalize",
                 "Internalize Global Symbols", false, false)
 
-InternalizePass::InternalizePass()
-  : ModulePass(ID) {
+InternalizePass::InternalizePass(bool OnlyHidden)
+  : ModulePass(ID), OnlyHidden(OnlyHidden) {
   initializeInternalizePassPass(*PassRegistry::getPassRegistry());
   if (!APIFile.empty())           // If a filename is specified, use it.
     LoadFile(APIFile.c_str());
   ExternalNames.insert(APIList.begin(), APIList.end());
 }
 
-InternalizePass::InternalizePass(ArrayRef<const char *> ExportList)
-  : ModulePass(ID){
+InternalizePass::InternalizePass(ArrayRef<const char *> ExportList,
+                                 bool OnlyHidden)
+  : ModulePass(ID), OnlyHidden(OnlyHidden) {
   initializeInternalizePassPass(*PassRegistry::getPassRegistry());
   for(ArrayRef<const char *>::const_iterator itr = ExportList.begin();
         itr != ExportList.end(); itr++) {
@@ -106,7 +108,11 @@ void InternalizePass::LoadFile(const char *Filename) {
 }
 
 static bool shouldInternalize(const GlobalValue &GV,
-                              const std::set<std::string> &ExternalNames) {
+                              const std::set<std::string> &ExternalNames,
+                              bool OnlyHidden) {
+  if (OnlyHidden && !GV.hasHiddenVisibility())
+    return false;
+
   // Function must be defined here
   if (GV.isDeclaration())
     return false;
@@ -155,9 +161,8 @@ bool InternalizePass::runOnModule(Module &M) {
   }
 
   // Mark all functions not in the api as internal.
-  // FIXME: maybe use private linkage?
   for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
-    if (!shouldInternalize(*I, ExternalNames))
+    if (!shouldInternalize(*I, ExternalNames, OnlyHidden))
       continue;
 
     I->setLinkage(GlobalValue::InternalLinkage);
@@ -191,10 +196,9 @@ bool InternalizePass::runOnModule(Module &M) {
 
   // Mark all global variables with initializers that are not in the api as
   // internal as well.
-  // FIXME: maybe use private linkage?
   for (Module::global_iterator I = M.global_begin(), E = M.global_end();
        I != E; ++I) {
-    if (!shouldInternalize(*I, ExternalNames))
+    if (!shouldInternalize(*I, ExternalNames, OnlyHidden))
       continue;
 
     I->setLinkage(GlobalValue::InternalLinkage);
@@ -206,7 +210,7 @@ bool InternalizePass::runOnModule(Module &M) {
   // Mark all aliases that are not in the api as internal as well.
   for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
        I != E; ++I) {
-    if (!shouldInternalize(*I, ExternalNames))
+    if (!shouldInternalize(*I, ExternalNames, OnlyHidden))
       continue;
 
     I->setLinkage(GlobalValue::InternalLinkage);
@@ -218,10 +222,11 @@ bool InternalizePass::runOnModule(Module &M) {
   return Changed;
 }
 
-ModulePass *llvm::createInternalizePass() {
-  return new InternalizePass();
+ModulePass *llvm::createInternalizePass(bool OnlyHidden) {
+  return new InternalizePass(OnlyHidden);
 }
 
-ModulePass *llvm::createInternalizePass(ArrayRef<const char *> ExportList) {
-  return new InternalizePass(ExportList);
+ModulePass *llvm::createInternalizePass(ArrayRef<const char *> ExportList,
+                                        bool OnlyHidden) {
+  return new InternalizePass(ExportList, OnlyHidden);
 }