Remove old LTO interface.

[oota-llvm.git] / include / llvm / LinkTimeOptimizer.h

diff --git a/include/llvm/LinkTimeOptimizer.h b/include/llvm/LinkTimeOptimizer.h
index 8c38fe5ecfbff8d301422cc99d4ad3d8499fcd3d..eea0093e80f7caa3ec8a397400d465fdea12b27f 100644 (file)
--- a/include/llvm/LinkTimeOptimizer.h
+++ b/include/llvm/LinkTimeOptimizer.h
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Devang Patel and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 // 
 //===----------------------------------------------------------------------===//
 //
@@ -19,11 +19,15 @@
 #include <vector>
 #include <set>
 #include <llvm/ADT/hash_map>
+#include <cstring>
+
+#define LLVM_LTO_VERSION 2
 
 namespace llvm {
 
   class Module;
   class GlobalValue;
+  class TargetMachine;
 
   enum LTOStatus {
     LTO_UNKNOWN,
@@ -41,7 +45,21 @@ namespace llvm {
     LTOExternalLinkage, // Externally visible function
     LTOLinkOnceLinkage, // Keep one copy of named function when linking (inline)
     LTOWeakLinkage,     // Keep one copy of named function when linking (weak)
-    LTOInternalLinkage  // Rename collisions when linking (static functions)
+    LTOInternalLinkage, // Rename collisions when linking (static functions)
+    LTOCommonLinkage    // tentative definitions (usually equivalent to weak)
+  };
+
+  enum LTOVisibilityTypes {
+    LTODefaultVisibility = 0,  ///< The GV is visible
+    LTOHiddenVisibility,       ///< The GV is hidden
+    LTOProtectedVisibility     ///< The GV is protected
+  };
+
+
+  enum LTOCodeGenModel {
+    LTO_CGM_Static,
+    LTO_CGM_Dynamic,
+    LTO_CGM_DynamicNoPIC
   };
 
   /// This class represents LLVM symbol information without exposing details
@@ -53,20 +71,26 @@ namespace llvm {
   public:
 
     LTOLinkageTypes getLinkage() const { return linkage; }
+    LTOVisibilityTypes getVisibility() const { return visibility; }
     void mayBeNotUsed();
 
-    LLVMSymbol (enum LTOLinkageTypes lt, GlobalValue *g, const std::string &n, 
-               const std::string &m) : linkage(lt), gv(g), name(n), 
-                                       mangledName(m) {}
+    LLVMSymbol (enum LTOLinkageTypes lt, enum LTOVisibilityTypes vis, 
+                GlobalValue *g, const std::string &n, 
+                const std::string &m, int a) : linkage(lt), visibility(vis),
+                                               gv(g), name(n), 
+                                               mangledName(m), alignment(a) {}
 
     const char *getName() { return name.c_str(); }
     const char *getMangledName() { return mangledName.c_str(); }
+    int getAlignment() { return alignment; }
 
   private:
     enum LTOLinkageTypes linkage;
+    enum LTOVisibilityTypes visibility;
     GlobalValue *gv;
     std::string name;
     std::string mangledName;
+    int alignment;
   };
 
   class string_compare {
@@ -75,24 +99,73 @@ 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*> &exportList,
+                                           std::string &targetTriple,
+                                           bool saveTemps, const char *) = 0;
+    virtual void getTargetTriple(const std::string &, std::string &) = 0;
+    virtual void removeModule (const std::string &InputFilename) = 0;
+    virtual void setCodeGenModel(LTOCodeGenModel CGM) = 0;
+    virtual void printVersion () = 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*>, 
-                    string_compare> NameToSymbolMap;
+                     string_compare> NameToSymbolMap;
+    typedef hash_map<const char*, Module*, hash<const char*>, 
+                     string_compare> NameToModuleMap;
 
     enum LTOStatus readLLVMObjectFile(const std::string &InputFilename,
-                                     NameToSymbolMap &symbols,
-                                     std::set<std::string> &references);
+                                      NameToSymbolMap &symbols,
+                                      std::set<std::string> &references);
     enum LTOStatus optimizeModules(const std::string &OutputFilename,
-                                  std::vector<const char*> &exportList);
+                                   std::vector<const char*> &exportList,
+                                   std::string &targetTriple, 
+                                   bool saveTemps,  const char *);
+    void getTargetTriple(const std::string &InputFilename, 
+                         std::string &targetTriple);
+    void removeModule (const std::string &InputFilename);
+    void printVersion();
+
+    void setCodeGenModel(LTOCodeGenModel CGM) {
+      CGModel = CGM;
+    }
+
+    // Constructors and destructors
+    LTO() : Target(NULL), CGModel(LTO_CGM_Dynamic) {
+      /// TODO: Use Target info, it is available at this time.
+    }
+    ~LTO();
+
+  private:
+    Module *getModule (const std::string &InputFilename);
+    enum LTOStatus optimize(Module *, std::ostream &, 
+                            std::vector<const char *> &);
+    void getTarget(Module *);
 
   private:
     std::vector<Module *> modules;
     NameToSymbolMap allSymbols;
+    NameToModuleMap allModules;
+    TargetMachine *Target;
+    LTOCodeGenModel CGModel;
   };
 
 } // End llvm namespace
@@ -101,6 +174,6 @@ namespace llvm {
 /// linker to use dlopen() interface to dynamically load LinkTimeOptimizer.
 /// extern "C" helps, because dlopen() interface uses name to find the symbol.
 extern "C"
-llvm::LinkTimeOptimizer *createLLVMOptimizer();
+llvm::LinkTimeOptimizer *createLLVMOptimizer(unsigned VERSION = LLVM_LTO_VERSION);
 
 #endif