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85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
//===- BugDriver.cpp - Top-Level BugPoint class implementation ------------===//
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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/Module.h"
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#include "llvm/Bytecode/Reader.h"
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#include "llvm/Assembly/Parser.h"
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#include "llvm/Transforms/Utils/Linker.h"
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#include "llvm/Pass.h"
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#include <memory>
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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 *BugDriver::ParseInputFile(const std::string &InputFilename) const {
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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 << ToolName << ": 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 << ToolName << ": " << 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.
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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 (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? We
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// make the top-level decision by trying to run all of the passes on the the
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// input program, which should generate a bytecode file. If it does generate
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// a bytecode file, then we know the compiler didn't crash, so try to diagnose
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// a miscompilation.
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//
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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 debugCrash();
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else
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return debugMiscompilation();
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}
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