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-//===- BugDriver.cpp - Top-Level BugPoint class implementation ------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This class contains all of the shared state and information that is used by
-// the BugPoint tool to track down errors in optimizations. This class is the
-// main driver class that invokes all sub-functionality.
-//
-//===----------------------------------------------------------------------===//
-
-#include "BugDriver.h"
-#include "ToolRunner.h"
-#include "llvm/Linker.h"
-#include "llvm/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/IRReader.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/FileUtilities.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Host.h"
-#include <memory>
-using namespace llvm;
-
-namespace llvm {
- Triple TargetTriple;
-}
-
-// Anonymous namespace to define command line options for debugging.
-//
-namespace {
- // Output - The user can specify a file containing the expected output of the
- // program. If this filename is set, it is used as the reference diff source,
- // otherwise the raw input run through an interpreter is used as the reference
- // source.
- //
- cl::opt<std::string>
- OutputFile("output", cl::desc("Specify a reference program output "
- "(for miscompilation detection)"));
-}
-
-/// setNewProgram - If we reduce or update the program somehow, call this method
-/// to update bugdriver with it. This deletes the old module and sets the
-/// specified one as the current program.
-void BugDriver::setNewProgram(Module *M) {
- delete Program;
- Program = M;
-}
-
-
-/// getPassesString - Turn a list of passes into a string which indicates the
-/// command line options that must be passed to add the passes.
-///
-std::string llvm::getPassesString(const std::vector<std::string> &Passes) {
- std::string Result;
- for (unsigned i = 0, e = Passes.size(); i != e; ++i) {
- if (i) Result += " ";
- Result += "-";
- Result += Passes[i];
- }
- return Result;
-}
-
-BugDriver::BugDriver(const char *toolname, bool find_bugs,
- unsigned timeout, unsigned memlimit, bool use_valgrind,
- LLVMContext& ctxt)
- : Context(ctxt), ToolName(toolname), ReferenceOutputFile(OutputFile),
- Program(0), Interpreter(0), SafeInterpreter(0), gcc(0),
- run_find_bugs(find_bugs), Timeout(timeout),
- MemoryLimit(memlimit), UseValgrind(use_valgrind) {}
-
-BugDriver::~BugDriver() {
- delete Program;
-}
-
-
-/// ParseInputFile - Given a bitcode or assembly input filename, parse and
-/// return it, or return null if not possible.
-///
-Module *llvm::ParseInputFile(const std::string &Filename,
- LLVMContext& Ctxt) {
- SMDiagnostic Err;
- Module *Result = ParseIRFile(Filename, Err, Ctxt);
- if (!Result)
- Err.Print("bugpoint", errs());
-
- // If we don't have an override triple, use the first one to configure
- // bugpoint, or use the host triple if none provided.
- if (Result) {
- if (TargetTriple.getTriple().empty()) {
- Triple TheTriple(Result->getTargetTriple());
-
- if (TheTriple.getTriple().empty())
- TheTriple.setTriple(sys::getHostTriple());
-
- TargetTriple.setTriple(TheTriple.getTriple());
- }
-
- Result->setTargetTriple(TargetTriple.getTriple()); // override the triple
- }
- return Result;
-}
-
-// This method takes the specified list of LLVM input files, attempts to load
-// them, either as assembly or bitcode, then link them together. It returns
-// true on failure (if, for example, an input bitcode file could not be
-// parsed), and false on success.
-//
-bool BugDriver::addSources(const std::vector<std::string> &Filenames) {
- assert(Program == 0 && "Cannot call addSources multiple times!");
- assert(!Filenames.empty() && "Must specify at least on input filename!");
-
- // Load the first input file.
- Program = ParseInputFile(Filenames[0], Context);
- if (Program == 0) return true;
-
- outs() << "Read input file : '" << Filenames[0] << "'\n";
-
- for (unsigned i = 1, e = Filenames.size(); i != e; ++i) {
- std::auto_ptr<Module> M(ParseInputFile(Filenames[i], Context));
- if (M.get() == 0) return true;
-
- outs() << "Linking in input file: '" << Filenames[i] << "'\n";
- std::string ErrorMessage;
- if (Linker::LinkModules(Program, M.get(), &ErrorMessage)) {
- errs() << ToolName << ": error linking in '" << Filenames[i] << "': "
- << ErrorMessage << '\n';
- return true;
- }
- }
-
- outs() << "*** All input ok\n";
-
- // All input files read successfully!
- return false;
-}
-
-
-
-/// run - The top level method that is invoked after all of the instance
-/// variables are set up from command line arguments.
-///
-bool BugDriver::run(std::string &ErrMsg) {
- if (run_find_bugs) {
- // Rearrange the passes and apply them to the program. Repeat this process
- // until the user kills the program or we find a bug.
- return runManyPasses(PassesToRun, ErrMsg);
- }
-
- // If we're not running as a child, the first thing that we must do is
- // determine what the problem is. Does the optimization series crash the
- // compiler, or does it produce illegal code? We make the top-level
- // decision by trying to run all of the passes on the the input program,
- // which should generate a bitcode file. If it does generate a bitcode
- // file, then we know the compiler didn't crash, so try to diagnose a
- // miscompilation.
- if (!PassesToRun.empty()) {
- outs() << "Running selected passes on program to test for crash: ";
- if (runPasses(Program, PassesToRun))
- return debugOptimizerCrash();
- }
-
- // Set up the execution environment, selecting a method to run LLVM bitcode.
- if (initializeExecutionEnvironment()) return true;
-
- // Test to see if we have a code generator crash.
- outs() << "Running the code generator to test for a crash: ";
- std::string Error;
- compileProgram(Program, &Error);
- if (!Error.empty()) {
- outs() << Error;
- return debugCodeGeneratorCrash(ErrMsg);
- }
- outs() << '\n';
-
- // Run the raw input to see where we are coming from. If a reference output
- // was specified, make sure that the raw output matches it. If not, it's a
- // problem in the front-end or the code generator.
- //
- bool CreatedOutput = false;
- if (ReferenceOutputFile.empty()) {
- outs() << "Generating reference output from raw program: ";
- if (!createReferenceFile(Program)) {
- return debugCodeGeneratorCrash(ErrMsg);
- }
- CreatedOutput = true;
- }
-
- // Make sure the reference output file gets deleted on exit from this
- // function, if appropriate.
- sys::Path ROF(ReferenceOutputFile);
- FileRemover RemoverInstance(ROF, CreatedOutput && !SaveTemps);
-
- // Diff the output of the raw program against the reference output. If it
- // matches, then we assume there is a miscompilation bug and try to
- // diagnose it.
- outs() << "*** Checking the code generator...\n";
- bool Diff = diffProgram(Program, "", "", false, &Error);
- if (!Error.empty()) {
- errs() << Error;
- return debugCodeGeneratorCrash(ErrMsg);
- }
- if (!Diff) {
- outs() << "\n*** Output matches: Debugging miscompilation!\n";
- debugMiscompilation(&Error);
- if (!Error.empty()) {
- errs() << Error;
- return debugCodeGeneratorCrash(ErrMsg);
- }
- return false;
- }
-
- outs() << "\n*** Input program does not match reference diff!\n";
- outs() << "Debugging code generator problem!\n";
- bool Failure = debugCodeGenerator(&Error);
- if (!Error.empty()) {
- errs() << Error;
- return debugCodeGeneratorCrash(ErrMsg);
- }
- return Failure;
-}
-
-void llvm::PrintFunctionList(const std::vector<Function*> &Funcs) {
- unsigned NumPrint = Funcs.size();
- if (NumPrint > 10) NumPrint = 10;
- for (unsigned i = 0; i != NumPrint; ++i)
- outs() << " " << Funcs[i]->getName();
- if (NumPrint < Funcs.size())
- outs() << "... <" << Funcs.size() << " total>";
- outs().flush();
-}
-
-void llvm::PrintGlobalVariableList(const std::vector<GlobalVariable*> &GVs) {
- unsigned NumPrint = GVs.size();
- if (NumPrint > 10) NumPrint = 10;
- for (unsigned i = 0; i != NumPrint; ++i)
- outs() << " " << GVs[i]->getName();
- if (NumPrint < GVs.size())
- outs() << "... <" << GVs.size() << " total>";
- outs().flush();
-}