-//===----------------------------------------------------------------------===//
-// LLVM INTERPRETER/DEBUGGER/PROFILER UTILITY
+//===- lli.cpp - LLVM Interpreter / Dynamic compiler ----------------------===//
//
-// 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.
+// This utility provides a way to execute LLVM bytecode without static
+// compilation. This consists of a very simple and slow (but portable)
+// interpreter, along with capability for system specific dynamic compilers. At
+// runtime, the fastest (stable) execution engine is selected to run the
+// program. This means the JIT compiler for the current platform if it's
+// available.
//
//===----------------------------------------------------------------------===//
-#include "Interpreter.h"
-#include "llvm/Support/CommandLine.h"
+#include "ExecutionEngine.h"
+#include "Support/CommandLine.h"
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Module.h"
+#include "llvm/Target/TargetMachineImpls.h"
+
+namespace {
+ cl::opt<std::string>
+ InputFile(cl::desc("<input bytecode>"), cl::Positional, cl::init("-"));
+
+ cl::list<std::string>
+ InputArgv(cl::ConsumeAfter, cl::desc("<program arguments>..."));
+
+ cl::opt<std::string>
+ MainFunction ("f", cl::desc("Function to execute"), cl::init("main"),
+ cl::value_desc("function name"));
-cl::StringList InputArgv("" , "Input command line", cl::ConsumeAfter);
-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 TraceMode ("trace" , "Enable Tracing");
-cl::Flag ProfileMode ("profile", "Enable Profiling [unimp]");
+ cl::opt<bool> DebugMode("d", cl::desc("Start program in debugger"));
+ cl::opt<bool> TraceMode("trace", cl::desc("Enable Tracing"));
+
+ cl::opt<bool> ForceInterpreter("force-interpreter",
+ cl::desc("Force interpretation: disable JIT"),
+ cl::init(false));
+}
//===----------------------------------------------------------------------===//
-// Interpreter ctor - Initialize stuff
+// ExecutionEngine Class Implementation
//
-Interpreter::Interpreter() : ExitCode(0), Profile(ProfileMode),
- Trace(TraceMode), CurFrame(-1) {
- CurMod = 0;
- loadModule(InputArgv.size() ? InputArgv[0] : "-");
-
- // Initialize the "backend"
- initializeExecutionEngine();
- initializeExternalMethods();
+
+ExecutionEngine::~ExecutionEngine() {
+ delete &CurMod;
}
//===----------------------------------------------------------------------===//
// 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();
- if (TraceMode) I.enableTracing();
-
- // Ensure that there is at least one argument... the name of the program.
- // This is only unavailable if the program was read from stdin, instead of a
- // file.
- //
- if (InputArgv.empty())
- InputArgv.push_back("from-stdin-prog");
-
- // Start interpreter into the main function...
- //
- if (!I.callMainMethod(MainFunction, InputArgv) && !DebugMode) {
- // If not in debug mode and if the call succeeded, run the code now...
- I.run();
+ cl::ParseCommandLineOptions(argc, argv,
+ " llvm interpreter & dynamic compiler\n");
+
+ // Load the bytecode...
+ std::string ErrorMsg;
+ Module *M = ParseBytecodeFile(InputFile, &ErrorMsg);
+ if (M == 0) {
+ std::cout << "Error parsing '" << InputFile << "': "
+ << ErrorMsg << "\n";
+ exit(1);
}
- // 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();
+#if 0
+ // Link in the runtime library for LLI...
+ std::string RuntimeLib = getCurrentExecutablePath();
+ if (!RuntimeLib.empty()) RuntimeLib += "/";
+ RuntimeLib += "RuntimeLib.bc";
+
+ if (Module *SupportLib = ParseBytecodeFile(RuntimeLib, &ErrorMsg)) {
+ if (LinkModules(M, SupportLib, &ErrorMsg))
+ std::cerr << "Error Linking runtime library into current module: "
+ << ErrorMsg << "\n";
+ } else {
+ std::cerr << "Error loading runtime library '"+RuntimeLib+"': "
+ << ErrorMsg << "\n";
+ }
+#endif
+
+ unsigned Config = (M->isLittleEndian() ? TM::LittleEndian : TM::BigEndian) |
+ (M->has32BitPointers() ? TM::PtrSize32 : TM::PtrSize64);
+ ExecutionEngine *EE = 0;
+
+ // If there is nothing that is forcing us to use the interpreter, make a JIT.
+ if (!ForceInterpreter && !DebugMode && !TraceMode)
+ EE = ExecutionEngine::createJIT(M, Config);
+
+ // If we can't make a JIT, make an interpreter instead.
+ if (EE == 0)
+ EE = ExecutionEngine::createInterpreter(M, Config, DebugMode, TraceMode);
+
+ // Add the module name to the start of the argv vector...
+ InputArgv.insert(InputArgv.begin(), InputFile);
+
+ // Run the main function!
+ int ExitCode = EE->run(MainFunction, InputArgv);
- // Return the status code of the program executed...
- return I.getExitCode();
+ // Now that we are done executing the program, shut down the execution engine
+ delete EE;
+ return ExitCode;
}
projects / oota-llvm.git / blobdiff