Mark some debug variables as 'unused' to quiet compiler and analyzer.

[oota-llvm.git] / tools / lli / lli.cpp

diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
index d62d33209850832c9c743267003d9857aa7c445d..218bb93670aed0e374f4ce884675f67af17b1e64 100644 (file)
--- a/tools/lli/lli.cpp
+++ b/tools/lli/lli.cpp
@@ -9,26 +9,29 @@
 //
 // This utility provides a simple wrapper around the LLVM Execution Engines,
 // which allow the direct execution of LLVM programs through a Just-In-Time
-// compiler, or through an intepreter if no JIT is available for this platform.
+// compiler, or through an interpreter if no JIT is available for this platform.
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/ModuleProvider.h"
 #include "llvm/Type.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/CodeGen/LinkAllCodegenComponents.h"
-#include "llvm/ExecutionEngine/JIT.h"
-#include "llvm/ExecutionEngine/Interpreter.h"
 #include "llvm/ExecutionEngine/GenericValue.h"
+#include "llvm/ExecutionEngine/Interpreter.h"
+#include "llvm/ExecutionEngine/JIT.h"
+#include "llvm/ExecutionEngine/JITEventListener.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PluginLoader.h"
 #include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/System/Process.h"
 #include "llvm/System/Signals.h"
-#include <iostream>
+#include "llvm/Target/TargetSelect.h"
 #include <cerrno>
 using namespace llvm;
 
@@ -43,10 +46,14 @@ namespace {
                                  cl::desc("Force interpretation: disable JIT"),
                                  cl::init(false));
 
-  cl::opt<bool> Fast("fast", 
-                     cl::desc("Generate code quickly, "
-                              "potentially sacrificing code quality"),
-                     cl::init(false));
+  // Determine optimization level.
+  cl::opt<char>
+  OptLevel("O",
+           cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
+                    "(default = '-O2')"),
+           cl::Prefix,
+           cl::ZeroOrMore,
+           cl::init(' '));
 
   cl::opt<std::string>
   TargetTriple("mtriple", cl::desc("Override target triple for module"));
@@ -87,7 +94,13 @@ int main(int argc, char **argv, char * const *envp) {
   sys::PrintStackTraceOnErrorSignal();
   PrettyStackTraceProgram X(argc, argv);
   
+  LLVMContext &Context = getGlobalContext();
   atexit(do_shutdown);  // Call llvm_shutdown() on exit.
+
+  // If we have a native target, initialize it to ensure it is linked in and
+  // usable by the JIT.
+  InitializeNativeTarget();
+
   cl::ParseCommandLineOptions(argc, argv,
                               "llvm interpreter & dynamic compiler\n");
 
@@ -98,14 +111,14 @@ int main(int argc, char **argv, char * const *envp) {
   // Load the bitcode...
   std::string ErrorMsg;
   ModuleProvider *MP = NULL;
-  if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)) {
-    MP = getBitcodeModuleProvider(Buffer, &ErrorMsg);
+  if (MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFile,&ErrorMsg)){
+    MP = getBitcodeModuleProvider(Buffer, Context, &ErrorMsg);
     if (!MP) delete Buffer;
   }
   
   if (!MP) {
-    std::cerr << argv[0] << ": error loading program '" << InputFile << "': "
-              << ErrorMsg << "\n";
+    errs() << argv[0] << ": error loading program '" << InputFile << "': "
+           << ErrorMsg << "\n";
     exit(1);
   }
 
@@ -113,23 +126,46 @@ int main(int argc, char **argv, char * const *envp) {
   Module *Mod = NoLazyCompilation
     ? MP->materializeModule(&ErrorMsg) : MP->getModule();
   if (!Mod) {
-    std::cerr << argv[0] << ": bitcode didn't read correctly.\n";
-    std::cerr << "Reason: " << ErrorMsg << "\n";
+    errs() << argv[0] << ": bitcode didn't read correctly.\n";
+    errs() << "Reason: " << ErrorMsg << "\n";
     exit(1);
   }
 
+  EngineBuilder builder(MP);
+  builder.setErrorStr(&ErrorMsg);
+  builder.setEngineKind(ForceInterpreter
+                        ? EngineKind::Interpreter
+                        : EngineKind::JIT);
+
   // If we are supposed to override the target triple, do so now.
   if (!TargetTriple.empty())
     Mod->setTargetTriple(TargetTriple);
 
-  EE = ExecutionEngine::create(MP, ForceInterpreter, &ErrorMsg, Fast);
-  if (!EE && !ErrorMsg.empty()) {
-    std::cerr << argv[0] << ":error creating EE: " << ErrorMsg << "\n";
+  CodeGenOpt::Level OLvl = CodeGenOpt::Default;
+  switch (OptLevel) {
+  default:
+    errs() << argv[0] << ": invalid optimization level.\n";
+    return 1;
+  case ' ': break;
+  case '0': OLvl = CodeGenOpt::None; break;
+  case '1': OLvl = CodeGenOpt::Less; break;
+  case '2': OLvl = CodeGenOpt::Default; break;
+  case '3': OLvl = CodeGenOpt::Aggressive; break;
+  }
+  builder.setOptLevel(OLvl);
+
+  EE = builder.create();
+  if (!EE) {
+    if (!ErrorMsg.empty())
+      errs() << argv[0] << ": error creating EE: " << ErrorMsg << "\n";
+    else
+      errs() << argv[0] << ": unknown error creating EE!\n";
     exit(1);
   }
 
-  if (NoLazyCompilation)
-    EE->DisableLazyCompilation();
+  EE->RegisterJITEventListener(createOProfileJITEventListener());
+
+  EE->DisableLazyCompilation(NoLazyCompilation);
 
   // If the user specifically requested an argv[0] to pass into the program,
   // do it now.
@@ -152,14 +188,15 @@ int main(int argc, char **argv, char * const *envp) {
   //
   Function *EntryFn = Mod->getFunction(EntryFunc);
   if (!EntryFn) {
-    std::cerr << '\'' << EntryFunc << "\' function not found in module.\n";
+    errs() << '\'' << EntryFunc << "\' function not found in module.\n";
     return -1;
   }
 
   // If the program doesn't explicitly call exit, we will need the Exit 
   // function later on to make an explicit call, so get the function now. 
-  Constant *Exit = Mod->getOrInsertFunction("exit", Type::VoidTy,
-                                                        Type::Int32Ty, NULL);
+  Constant *Exit = Mod->getOrInsertFunction("exit", Type::getVoidTy(Context),
+                                                    Type::getInt32Ty(Context),
+                                                    NULL);
   
   // Reset errno to zero on entry to main.
   errno = 0;
@@ -189,10 +226,10 @@ int main(int argc, char **argv, char * const *envp) {
     ResultGV.IntVal = APInt(32, Result);
     Args.push_back(ResultGV);
     EE->runFunction(ExitF, Args);
-    std::cerr << "ERROR: exit(" << Result << ") returned!\n";
+    errs() << "ERROR: exit(" << Result << ") returned!\n";
     abort();
   } else {
-    std::cerr << "ERROR: exit defined with wrong prototype!\n";
+    errs() << "ERROR: exit defined with wrong prototype!\n";
     abort();
   }
 }