Initial checkin of interpreter

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@361 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 67 insertions, 0 deletions

diff --git a/tools/lli/lli.cpp b/tools/lli/lli.cpp
new file mode 100644
index 0000000000..9611e0ca85
--- /dev/null
+++ b/tools/lli/lli.cpp
@@ -0,0 +1,67 @@
+//===----------------------------------------------------------------------===//
+// LLVM INTERPRETER/DEBUGGER/PROFILER UTILITY 
+//
+// This utility is an interactive frontend to almost all other LLVM
+// functionality.  It may be used as an interpreter to run code, a debugger to
+// find problems, or a profiler to analyze execution frequencies.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Interpreter.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Bytecode/Reader.h"
+
+cl::String InputFilename(""       , "Input filename", cl::NoFlags, "-");
+cl::String MainFunction ("f"      , "Function to execute", cl::NoFlags, "main");
+cl::Flag   DebugMode    ("debug"  , "Start program in debugger");
+cl::Alias  DebugModeA   ("d"      , "Alias for -debug", cl::NoFlags, DebugMode);
+cl::Flag   ProfileMode  ("profile", "Enable Profiling [unimp]");
+
+//===----------------------------------------------------------------------===//
+// Interpreter ctor - Initialize stuff
+//
+Interpreter::Interpreter() : ExitCode(0), Profile(ProfileMode), CurFrame(-1) {
+  CurMod = ParseBytecodeFile(InputFilename);
+  if (CurMod == 0) {
+    cout << "Error parsing '" << InputFilename << "': No module loaded.\n";
+  }
+
+  // Initialize the "backend"
+  initializeExecutionEngine();
+}
+
+//===----------------------------------------------------------------------===//
+// main Driver function
+//
+int main(int argc, char** argv) {
+  cl::ParseCommandLineOptions(argc, argv, " llvm interpreter\n");
+
+  // Create the interpreter...
+  Interpreter I;
+
+  // Handle alternate names of the program.  If started as llp, enable profiling
+  // if started as ldb, enable debugging...
+  //
+  if (argv[0] == "ldb")       // TODO: Obviously incorrect, but you get the idea
+    DebugMode = true;
+  else if (argv[0] == "llp")
+    ProfileMode = true;
+
+  // If running with the profiler, enable it now...
+  if (ProfileMode) I.enableProfiling();
+
+  // Start interpreter into the main function...
+  //
+  if (!I.callMethod(MainFunction) && !DebugMode) {
+    // If not in debug mode and if the call succeeded, run the code now...
+    I.run();
+  }
+
+  // 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 (DebugMode || I.isStopped())
+    I.handleUserInput();
+
+  // Return the status code of the program executed...
+  return I.getExitCode();
+}