Convert more code to use Operator instead of explicitly handling both

[oota-llvm.git] / lib / ExecutionEngine / Interpreter / Interpreter.cpp

diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.cpp b/lib/ExecutionEngine/Interpreter/Interpreter.cpp
index 6f540e2d1a8a3d0a161c22e6b0b31aaf42e5cde0..902f6768dc8ab7c906bd1fd755c2f094765ccd2b 100644 (file)
--- a/lib/ExecutionEngine/Interpreter/Interpreter.cpp
+++ b/lib/ExecutionEngine/Interpreter/Interpreter.cpp
@@ -1,5 +1,12 @@
 //===- Interpreter.cpp - Top-Level LLVM Interpreter Implementation --------===//
 //
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
 // This file implements the top-level functionality for the LLVM interpreter.
 // This interpreter is designed to be a very simple, portable, inefficient
 // interpreter.
@@ -7,78 +14,88 @@
 //===----------------------------------------------------------------------===//
 
 #include "Interpreter.h"
+#include "llvm/CodeGen/IntrinsicLowering.h"
+#include "llvm/DerivedTypes.h"
 #include "llvm/Module.h"
+#include "llvm/ModuleProvider.h"
+#include <cstring>
+using namespace llvm;
+
+namespace {
+
+static struct RegisterInterp {
+  RegisterInterp() { Interpreter::Register(); }
+} InterpRegistrator;
+
+}
+
+extern "C" void LLVMLinkInInterpreter() { }
 
 /// create - Create a new interpreter object.  This can never fail.
 ///
-ExecutionEngine *Interpreter::create(Module *M, bool DebugMode, bool TraceMode){
-  bool isLittleEndian;
-  switch (M->getEndianness()) {
-  case Module::LittleEndian: isLittleEndian = true; break;
-  case Module::BigEndian:    isLittleEndian = false; break;
-  case Module::AnyPointerSize:
-    int Test = 0;
-    *(char*)&Test = 1;    // Return true if the host is little endian
-    isLittleEndian = (Test == 1);
-    break;
-  }
+ExecutionEngine *Interpreter::create(ModuleProvider *MP, std::string* ErrStr,
+                                     CodeGenOpt::Level OptLevel, /*unused*/
+                                     bool GVsWithCode /* unused */) {
+  // Tell this ModuleProvide to materialize and release the module
+  if (!MP->materializeModule(ErrStr))
+    // We got an error, just return 0
+    return 0;
 
-  bool isLongPointer;
-  switch (M->getPointerSize()) {
-  case Module::Pointer32: isLongPointer = false; break;
-  case Module::Pointer64: isLongPointer = true; break;
-  case Module::AnyPointerSize:
-    isLongPointer = (sizeof(void*) == 8);  // Follow host
-    break;
-  }
-
-  return new Interpreter(M, isLittleEndian, isLongPointer, DebugMode,TraceMode);
+  return new Interpreter(MP);
 }
 
 //===----------------------------------------------------------------------===//
 // Interpreter ctor - Initialize stuff
 //
-Interpreter::Interpreter(Module *M, bool isLittleEndian, bool isLongPointer,
-                         bool DebugMode, bool TraceMode)
-  : ExecutionEngine(M), ExitCode(0), Debug(DebugMode), Trace(TraceMode),
-    CurFrame(-1), TD("lli", isLittleEndian, isLongPointer ? 8 : 4,
-                     isLongPointer ? 8 : 4, isLongPointer ? 8 : 4) {
-
-  setTargetData(TD);
+Interpreter::Interpreter(ModuleProvider *M)
+  : ExecutionEngine(M), TD(M->getModule()) {
+      
+  memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
+  setTargetData(&TD);
   // Initialize the "backend"
   initializeExecutionEngine();
   initializeExternalFunctions();
-  CW.setModule(M);  // Update Writer
   emitGlobals();
+
+  IL = new IntrinsicLowering(TD);
 }
 
-/// run - Start execution with the specified function and arguments.
-///
-int Interpreter::run(const std::string &MainFunction,
-                    const std::vector<std::string> &Args,
-                     const char ** envp) {
-  // Start interpreter into the main function...
-  //
-  if (!callMainFunction(MainFunction, Args) && !Debug) {
-    // If not in debug mode and if the call succeeded, run the code now...
+Interpreter::~Interpreter() {
+  delete IL;
+}
+
+void Interpreter::runAtExitHandlers () {
+  while (!AtExitHandlers.empty()) {
+    callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
+    AtExitHandlers.pop_back();
     run();
   }
-
-  do {
-    // If debug mode, allow the user to interact... also, if the user pressed 
-    // ctrl-c or execution hit an error, enter the event loop...
-    if (Debug || isStopped())
-      handleUserInput();
-
-    // If the program has exited, run atexit handlers...
-    if (ECStack.empty() && !AtExitHandlers.empty()) {
-      callFunction(AtExitHandlers.back(), std::vector<GenericValue>());
-      AtExitHandlers.pop_back();
-      run();
-    }
-  } while (!ECStack.empty());
-
-  PerformExitStuff();
-  return ExitCode;
 }
 
+/// run - Start execution with the specified function and arguments.
+///
+GenericValue
+Interpreter::runFunction(Function *F,
+                         const std::vector<GenericValue> &ArgValues) {
+  assert (F && "Function *F was null at entry to run()");
+
+  // Try extra hard not to pass extra args to a function that isn't
+  // expecting them.  C programmers frequently bend the rules and
+  // declare main() with fewer parameters than it actually gets
+  // passed, and the interpreter barfs if you pass a function more
+  // parameters than it is declared to take. This does not attempt to
+  // take into account gratuitous differences in declared types,
+  // though.
+  std::vector<GenericValue> ActualArgs;
+  const unsigned ArgCount = F->getFunctionType()->getNumParams();
+  for (unsigned i = 0; i < ArgCount; ++i)
+    ActualArgs.push_back(ArgValues[i]);
+
+  // Set up the function call.
+  callFunction(F, ActualArgs);
+
+  // Start executing the function.
+  run();
+
+  return ExitValue;
+}