mirror of
https://github.com/c64scene-ar/llvm-6502.git
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5136 91177308-0d34-0410-b5e6-96231b3b80d8
193 lines
5.9 KiB
C++
193 lines
5.9 KiB
C++
//===- ExecutionDriver.cpp - Allow execution of LLVM program --------------===//
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//
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// This file contains code used to execute the program utilizing one of the
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// various ways of running LLVM bytecode.
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//
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//===----------------------------------------------------------------------===//
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/*
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BUGPOINT NOTES:
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1. Bugpoint should not leave any files behind if the program works properly
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2. There should be an option to specify the program name, which specifies a
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unique string to put into output files. This allows operation in the
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SingleSource directory f.e. Default to the first input filename.
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*/
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#include "BugDriver.h"
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#include "SystemUtils.h"
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#include "Support/CommandLine.h"
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#include <fstream>
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#include <iostream>
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namespace {
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// OutputType - Allow the user to specify the way code should be run, to test
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// for miscompilation.
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//
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enum OutputType {
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RunLLI, RunJIT, RunLLC, RunCBE
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};
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cl::opt<OutputType>
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InterpreterSel(cl::desc("Specify how LLVM code should be executed:"),
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cl::values(clEnumValN(RunLLI, "run-lli", "Execute with LLI"),
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clEnumValN(RunJIT, "run-jit", "Execute with JIT"),
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clEnumValN(RunLLC, "run-llc", "Compile with LLC"),
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clEnumValN(RunCBE, "run-cbe", "Compile with CBE"),
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0));
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}
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/// AbstractInterpreter Class - Subclasses of this class are used to execute
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/// LLVM bytecode in a variety of ways. This abstract interface hides this
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/// complexity behind a simple interface.
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///
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struct AbstractInterpreter {
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virtual ~AbstractInterpreter() {}
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/// ExecuteProgram - Run the specified bytecode file, emitting output to the
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/// specified filename. This returns the exit code of the program.
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///
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virtual int ExecuteProgram(const std::string &Bytecode,
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const std::string &OutputFile) = 0;
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};
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//===----------------------------------------------------------------------===//
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// LLI Implementation of AbstractIntepreter interface
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//
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class LLI : public AbstractInterpreter {
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std::string LLIPath; // The path to the LLI executable
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public:
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LLI(const std::string &Path) : LLIPath(Path) { }
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// LLI create method - Try to find the LLI executable
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static LLI *create(BugDriver *BD, std::string &Message) {
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std::string LLIPath = FindExecutable("lli", BD->getToolName());
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if (!LLIPath.empty()) {
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Message = "Found lli: " + LLIPath + "\n";
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return new LLI(LLIPath);
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}
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Message = "Cannot find 'lli' in bugpoint executable directory or PATH!\n";
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return 0;
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}
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virtual int ExecuteProgram(const std::string &Bytecode,
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const std::string &OutputFile);
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};
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int LLI::ExecuteProgram(const std::string &Bytecode,
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const std::string &OutputFile) {
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const char *Args[] = {
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"-abort-on-exception",
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"-quiet",
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Bytecode.c_str(),
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0
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};
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return RunProgramWithTimeout(LLIPath, Args,
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"/dev/null", OutputFile, OutputFile);
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}
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//===----------------------------------------------------------------------===//
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// BugDriver method implementation
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//
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/// initializeExecutionEnvironment - This method is used to set up the
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/// environment for executing LLVM programs.
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///
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bool BugDriver::initializeExecutionEnvironment() {
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std::cout << "Initializing execution environment: ";
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// FIXME: This should default to searching for the best interpreter to use on
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// this platform, which would be JIT, then LLC, then CBE, then LLI.
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// Create an instance of the AbstractInterpreter interface as specified on the
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// command line
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std::string Message;
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if (InterpreterSel == RunLLI) {
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Interpreter = LLI::create(this, Message);
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} else {
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Message = " Sorry, only LLI is supported right now!";
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}
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std::cout << Message;
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// If there was an error creating the selected interpreter, quit with error.
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return Interpreter == 0;
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}
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/// executeProgram - This method runs "Program", capturing the output of the
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/// program to a file, returning the filename of the file. A recommended
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/// filename may be optionally specified.
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///
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std::string BugDriver::executeProgram(std::string OutputFile,
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std::string BytecodeFile) {
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assert(Interpreter && "Interpreter should have been created already!");
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bool CreatedBytecode = false;
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if (BytecodeFile.empty()) {
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// Emit the program to a bytecode file...
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BytecodeFile = getUniqueFilename("bugpoint-test-program.bc");
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if (writeProgramToFile(BytecodeFile, Program)) {
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std::cerr << ToolName << ": Error emitting bytecode to file '"
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<< BytecodeFile << "'!\n";
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exit(1);
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}
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CreatedBytecode = true;
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}
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if (OutputFile.empty()) OutputFile = "bugpoint-execution-output";
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// Check to see if this is a valid output filename...
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OutputFile = getUniqueFilename(OutputFile);
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// Actually execute the program!
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int RetVal = Interpreter->ExecuteProgram(BytecodeFile, OutputFile);
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// Remove the temporary bytecode file.
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if (CreatedBytecode)
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removeFile(BytecodeFile);
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// Return the filename we captured the output to.
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return OutputFile;
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}
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/// diffProgram - This method executes the specified module and diffs the output
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/// against the file specified by ReferenceOutputFile. If the output is
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/// different, true is returned.
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///
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bool BugDriver::diffProgram(const std::string &ReferenceOutputFile,
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const std::string &BytecodeFile) {
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// Execute the program, generating an output file...
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std::string Output = executeProgram("", BytecodeFile);
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std::ifstream ReferenceFile(ReferenceOutputFile.c_str());
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if (!ReferenceFile) {
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std::cerr << "Couldn't open reference output file '"
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<< ReferenceOutputFile << "'\n";
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exit(1);
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}
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std::ifstream OutputFile(Output.c_str());
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if (!OutputFile) {
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std::cerr << "Couldn't open output file: " << Output << "'!\n";
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exit(1);
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}
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bool FilesDifferent = false;
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// Compare the two files...
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int C1, C2;
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do {
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C1 = ReferenceFile.get();
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C2 = OutputFile.get();
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if (C1 != C2) { FilesDifferent = true; break; }
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} while (C1 != EOF);
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removeFile(Output);
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return FilesDifferent;
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}
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