Use abstract class to facilitate dlopen() interface.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30569 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 25 insertions, 7 deletions

diff --git a/include/llvm/LinkTimeOptimizer.h b/include/llvm/LinkTimeOptimizer.h
index 006f1171c8..654623adff 100644
--- a/include/llvm/LinkTimeOptimizer.h
+++ b/include/llvm/LinkTimeOptimizer.h
@@ -75,10 +75,28 @@ namespace llvm {
       return (strcmp(left, right) == 0); 
     }
   };
-  
+
+  /// This is abstract class to facilitate dlopen() interface.
+  /// See LTO below for more info.
+  class LinkTimeOptimizer {
+  public:
+    typedef hash_map<const char*, LLVMSymbol*, hash<const char*>, 
+                     string_compare> NameToSymbolMap;
+    typedef hash_map<const char*, Module*, hash<const char*>, 
+                     string_compare> NameToModuleMap;
+    virtual enum LTOStatus readLLVMObjectFile(const std::string &,
+                                              NameToSymbolMap &,
+                                              std::set<std::string> &) = 0;
+    virtual enum LTOStatus optimizeModules(const std::string &,
+                                   std::vector<const char*> &,
+                                   std::string &) = 0;
+    virtual void getTargetTriple(const std::string &, std::string &) = 0;
+    virtual ~LinkTimeOptimizer() = 0;
+  };
+
   /// This is the main link time optimization class. It exposes simple API
   /// to perform link time optimization using LLVM intermodular optimizer.
-  class LinkTimeOptimizer {
+  class LTO : public LinkTimeOptimizer {
 
   public:
     typedef hash_map<const char*, LLVMSymbol*, hash<const char*>, 
diff --git a/tools/lto/lto.cpp b/tools/lto/lto.cpp
index 7f1ec1ac34..cd3cc341c0 100644
--- a/tools/lto/lto.cpp
+++ b/tools/lto/lto.cpp
@@ -44,7 +44,7 @@ using namespace llvm;
 extern "C"
 llvm::LinkTimeOptimizer *createLLVMOptimizer()
 {
-  llvm::LinkTimeOptimizer *l = new llvm::LinkTimeOptimizer();
+  llvm::LTO *l = new llvm::LTO();
   return l;
 }
 
@@ -105,7 +105,7 @@ findExternalRefs(Value *value, std::set<std::string> &references,
 /// InputFilename is a LLVM bytecode file. If Module with InputFilename is
 /// available then return it. Otherwise parseInputFilename.
 Module *
-LinkTimeOptimizer::getModule(const std::string &InputFilename)
+LTO::getModule(const std::string &InputFilename)
 {
   Module *m = NULL;
 
@@ -122,7 +122,7 @@ LinkTimeOptimizer::getModule(const std::string &InputFilename)
 /// InputFilename is a LLVM bytecode file. Reade this bytecode file and 
 /// set corresponding target triplet string.
 void
-LinkTimeOptimizer::getTargetTriple(const std::string &InputFilename, 
+LTO::getTargetTriple(const std::string &InputFilename, 
 				   std::string &targetTriple)
 {
   Module *m = getModule(InputFilename);
@@ -135,7 +135,7 @@ LinkTimeOptimizer::getTargetTriple(const std::string &InputFilename,
 /// Collect external references in references vector.
 /// Return LTO_READ_SUCCESS if there is no error.
 enum LTOStatus
-LinkTimeOptimizer::readLLVMObjectFile(const std::string &InputFilename,
+LTO::readLLVMObjectFile(const std::string &InputFilename,
                                       NameToSymbolMap &symbols,
                                       std::set<std::string> &references)
 {
@@ -310,7 +310,7 @@ static enum LTOStatus lto_optimize(Module *M, std::ostream &Out,
 /// native object file using OutputFilename
 /// Return appropriate LTOStatus.
 enum LTOStatus
-LinkTimeOptimizer::optimizeModules(const std::string &OutputFilename,
+LTO::optimizeModules(const std::string &OutputFilename,
                                    std::vector<const char *> &exportList,
                                    std::string &targetTriple)
 {