Initial checkin

llvm-svn: 5127

lib/ExecutionEngine/JIT/VM.h

@@ -0,0 +1,54 @@
+//===-- VM.h - Definitions for Virtual Machine ------------------*- C++ -*-===//
+//
+// This file defines the top-level Virtual Machine data structure.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef VM_H
+#define VM_H
+
+#include "../ExecutionEngine.h"
+#include "llvm/PassManager.h"
+#include <map>
+
+class Function;
+class GlobalValue;
+class Constant;
+class TargetMachine;
+class MachineCodeEmitter;
+
+class VM : public ExecutionEngine {
+  TargetMachine &TM;       // The current target we are compiling to
+  PassManager PM;          // Passes to compile a function
+  MachineCodeEmitter *MCE; // MCE object
+
+  // FunctionRefs - A mapping between addresses that refer to unresolved
+  // functions and the LLVM function object itself.  This is used by the fault
+  // handler to lazily patch up references...
+  //
+  std::map<void*, Function*> FunctionRefs;
+public:
+  VM(Module *M, TargetMachine *tm);
+  ~VM();
+
+  /// run - Start execution with the specified function and arguments.
+  ///
+  virtual int run(const std::string &FnName,
+		  const std::vector<std::string> &Args);
+
+  void addFunctionRef(void *Ref, Function *F) {
+    FunctionRefs[Ref] = F;
+  }
+
+  const std::string &getFunctionReferencedName(void *RefAddr);
+
+  void *resolveFunctionReference(void *RefAddr);
+
+private:
+  static MachineCodeEmitter *createEmitter(VM &V);
+  void setupPassManager();
+  void *getPointerToFunction(const Function *F);
+  void registerCallback();
+};
+
+#endif