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the declaration of a function to compile this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19073 91177308-0d34-0410-b5e6-96231b3b80d8
213 lines
7.4 KiB
C++
213 lines
7.4 KiB
C++
//===- BugDriver.cpp - Top-Level BugPoint class implementation ------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class contains all of the shared state and information that is used by
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// the BugPoint tool to track down errors in optimizations. This class is the
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// main driver class that invokes all sub-functionality.
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//
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//===----------------------------------------------------------------------===//
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#include "BugDriver.h"
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#include "llvm/Linker.h"
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#include "llvm/Module.h"
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#include "llvm/Pass.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Bytecode/Reader.h"
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#include "llvm/Support/ToolRunner.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileUtilities.h"
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#include <iostream>
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#include <memory>
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using namespace llvm;
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// Anonymous namespace to define command line options for debugging.
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//
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namespace {
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// Output - The user can specify a file containing the expected output of the
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// program. If this filename is set, it is used as the reference diff source,
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// otherwise the raw input run through an interpreter is used as the reference
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// source.
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//
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cl::opt<std::string>
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OutputFile("output", cl::desc("Specify a reference program output "
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"(for miscompilation detection)"));
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}
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/// setNewProgram - If we reduce or update the program somehow, call this method
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/// to update bugdriver with it. This deletes the old module and sets the
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/// specified one as the current program.
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void BugDriver::setNewProgram(Module *M) {
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delete Program;
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Program = M;
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}
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/// getPassesString - Turn a list of passes into a string which indicates the
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/// command line options that must be passed to add the passes.
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///
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std::string llvm::getPassesString(const std::vector<const PassInfo*> &Passes) {
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std::string Result;
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for (unsigned i = 0, e = Passes.size(); i != e; ++i) {
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if (i) Result += " ";
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Result += "-";
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Result += Passes[i]->getPassArgument();
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}
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return Result;
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}
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BugDriver::BugDriver(const char *toolname)
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: ToolName(toolname), ReferenceOutputFile(OutputFile),
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Program(0), Interpreter(0), cbe(0), gcc(0) {}
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/// ParseInputFile - Given a bytecode or assembly input filename, parse and
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/// return it, or return null if not possible.
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///
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Module *llvm::ParseInputFile(const std::string &InputFilename) {
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Module *Result = 0;
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try {
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Result = ParseBytecodeFile(InputFilename);
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if (!Result && !(Result = ParseAssemblyFile(InputFilename))){
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std::cerr << "bugpoint: could not read input file '"
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<< InputFilename << "'!\n";
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}
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} catch (const ParseException &E) {
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std::cerr << "bugpoint: " << E.getMessage() << '\n';
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Result = 0;
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}
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return Result;
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}
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// This method takes the specified list of LLVM input files, attempts to load
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// them, either as assembly or bytecode, then link them together. It returns
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// true on failure (if, for example, an input bytecode file could not be
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// parsed), and false on success.
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//
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bool BugDriver::addSources(const std::vector<std::string> &Filenames) {
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assert(Program == 0 && "Cannot call addSources multiple times!");
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assert(!Filenames.empty() && "Must specify at least on input filename!");
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// Load the first input file...
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Program = ParseInputFile(Filenames[0]);
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if (Program == 0) return true;
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std::cout << "Read input file : '" << Filenames[0] << "'\n";
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for (unsigned i = 1, e = Filenames.size(); i != e; ++i) {
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std::auto_ptr<Module> M(ParseInputFile(Filenames[i]));
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if (M.get() == 0) return true;
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std::cout << "Linking in input file: '" << Filenames[i] << "'\n";
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std::string ErrorMessage;
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if (Linker::LinkModules(Program, M.get(), &ErrorMessage)) {
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std::cerr << ToolName << ": error linking in '" << Filenames[i] << "': "
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<< ErrorMessage << '\n';
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return true;
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}
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}
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std::cout << "*** All input ok\n";
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// All input files read successfully!
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return false;
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}
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/// run - The top level method that is invoked after all of the instance
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/// variables are set up from command line arguments.
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///
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bool BugDriver::run() {
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// The first thing that we must do is determine what the problem is. Does the
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// optimization series crash the compiler, or does it produce illegal code?
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// We make the top-level decision by trying to run all of the passes on the
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// the input program, which should generate a bytecode file. If it does
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// generate a bytecode file, then we know the compiler didn't crash, so try
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// to diagnose a miscompilation.
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if (!PassesToRun.empty()) {
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std::cout << "Running selected passes on program to test for crash: ";
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if (runPasses(PassesToRun))
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return debugOptimizerCrash();
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}
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// Set up the execution environment, selecting a method to run LLVM bytecode.
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if (initializeExecutionEnvironment()) return true;
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// Test to see if we have a code generator crash.
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std::cout << "Running the code generator to test for a crash: ";
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try {
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compileProgram(Program);
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std::cout << '\n';
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} catch (ToolExecutionError &TEE) {
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std::cout << TEE.what();
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return debugCodeGeneratorCrash();
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}
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// Run the raw input to see where we are coming from. If a reference output
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// was specified, make sure that the raw output matches it. If not, it's a
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// problem in the front-end or the code generator.
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//
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bool CreatedOutput = false;
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if (ReferenceOutputFile.empty()) {
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std::cout << "Generating reference output from raw program: ";
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try {
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ReferenceOutputFile = executeProgramWithCBE("bugpoint.reference.out");
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CreatedOutput = true;
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std::cout << "Reference output is: " << ReferenceOutputFile << '\n';
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} catch (ToolExecutionError &TEE) {
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std::cerr << TEE.what();
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if (Interpreter != cbe) {
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std::cerr << "*** There is a bug running the C backend. Either debug"
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<< " it (use the -run-cbe bugpoint option), or fix the error"
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<< " some other way.\n";
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return 1;
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}
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return debugCodeGeneratorCrash();
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}
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}
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// Make sure the reference output file gets deleted on exit from this
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// function, if appropriate.
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sys::Path ROF(ReferenceOutputFile);
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FileRemover RemoverInstance(ROF, CreatedOutput);
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// Diff the output of the raw program against the reference output. If it
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// matches, then we have a miscompilation bug.
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std::cout << "*** Checking the code generator...\n";
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try {
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if (!diffProgram()) {
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std::cout << "\n*** Debugging miscompilation!\n";
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return debugMiscompilation();
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}
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} catch (ToolExecutionError &TEE) {
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std::cerr << TEE.what();
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return debugCodeGeneratorCrash();
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}
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std::cout << "\n*** Input program does not match reference diff!\n";
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std::cout << "Debugging code generator problem!\n";
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try {
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return debugCodeGenerator();
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} catch (ToolExecutionError &TEE) {
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std::cerr << TEE.what();
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return debugCodeGeneratorCrash();
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}
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}
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void llvm::PrintFunctionList(const std::vector<Function*> &Funcs) {
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unsigned NumPrint = Funcs.size();
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if (NumPrint > 10) NumPrint = 10;
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for (unsigned i = 0; i != NumPrint; ++i)
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std::cout << " " << Funcs[i]->getName();
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if (NumPrint < Funcs.size())
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std::cout << "... <" << Funcs.size() << " total>";
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std::cout << std::flush;
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}
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