mirror of
https://github.com/c64scene-ar/llvm-6502.git
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into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
248 lines
8.3 KiB
C++
248 lines
8.3 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 is distributed under the University of Illinois Open Source
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// 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 "ToolRunner.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Linker.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileUtilities.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/IRReader.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/raw_ostream.h"
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#include <memory>
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using namespace llvm;
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namespace llvm {
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Triple TargetTriple;
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}
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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<std::string> &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];
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}
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return Result;
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}
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BugDriver::BugDriver(const char *toolname, bool find_bugs,
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unsigned timeout, unsigned memlimit, bool use_valgrind,
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LLVMContext& ctxt)
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: Context(ctxt), ToolName(toolname), ReferenceOutputFile(OutputFile),
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Program(0), Interpreter(0), SafeInterpreter(0), gcc(0),
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run_find_bugs(find_bugs), Timeout(timeout),
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MemoryLimit(memlimit), UseValgrind(use_valgrind) {}
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BugDriver::~BugDriver() {
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delete Program;
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}
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/// ParseInputFile - Given a bitcode 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 &Filename,
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LLVMContext& Ctxt) {
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SMDiagnostic Err;
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Module *Result = ParseIRFile(Filename, Err, Ctxt);
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if (!Result)
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Err.print("bugpoint", errs());
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// If we don't have an override triple, use the first one to configure
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// bugpoint, or use the host triple if none provided.
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if (Result) {
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if (TargetTriple.getTriple().empty()) {
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Triple TheTriple(Result->getTargetTriple());
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if (TheTriple.getTriple().empty())
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TheTriple.setTriple(sys::getDefaultTargetTriple());
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TargetTriple.setTriple(TheTriple.getTriple());
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}
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Result->setTargetTriple(TargetTriple.getTriple()); // override the triple
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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 bitcode, then link them together. It returns
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// true on failure (if, for example, an input bitcode 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], Context);
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if (Program == 0) return true;
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outs() << "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], Context));
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if (M.get() == 0) return true;
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outs() << "Linking in input file: '" << Filenames[i] << "'\n";
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std::string ErrorMessage;
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if (Linker::LinkModules(Program, M.get(), Linker::DestroySource,
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&ErrorMessage)) {
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errs() << 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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outs() << "*** 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(std::string &ErrMsg) {
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if (run_find_bugs) {
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// Rearrange the passes and apply them to the program. Repeat this process
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// until the user kills the program or we find a bug.
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return runManyPasses(PassesToRun, ErrMsg);
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}
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// If we're not running as a child, the first thing that we must do is
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// determine what the problem is. Does the optimization series crash the
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// compiler, or does it produce illegal code? We make the top-level
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// decision by trying to run all of the passes on the input program,
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// which should generate a bitcode file. If it does generate a bitcode
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// file, then we know the compiler didn't crash, so try to diagnose a
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// miscompilation.
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if (!PassesToRun.empty()) {
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outs() << "Running selected passes on program to test for crash: ";
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if (runPasses(Program, 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 bitcode.
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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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outs() << "Running the code generator to test for a crash: ";
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std::string Error;
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compileProgram(Program, &Error);
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if (!Error.empty()) {
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outs() << Error;
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return debugCodeGeneratorCrash(ErrMsg);
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}
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outs() << '\n';
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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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outs() << "Generating reference output from raw program: ";
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if (!createReferenceFile(Program)) {
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return debugCodeGeneratorCrash(ErrMsg);
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}
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CreatedOutput = true;
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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.str(), CreatedOutput && !SaveTemps);
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// Diff the output of the raw program against the reference output. If it
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// matches, then we assume there is a miscompilation bug and try to
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// diagnose it.
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outs() << "*** Checking the code generator...\n";
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bool Diff = diffProgram(Program, "", "", false, &Error);
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if (!Error.empty()) {
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errs() << Error;
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return debugCodeGeneratorCrash(ErrMsg);
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}
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if (!Diff) {
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outs() << "\n*** Output matches: Debugging miscompilation!\n";
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debugMiscompilation(&Error);
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if (!Error.empty()) {
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errs() << Error;
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return debugCodeGeneratorCrash(ErrMsg);
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}
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return false;
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}
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outs() << "\n*** Input program does not match reference diff!\n";
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outs() << "Debugging code generator problem!\n";
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bool Failure = debugCodeGenerator(&Error);
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if (!Error.empty()) {
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errs() << Error;
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return debugCodeGeneratorCrash(ErrMsg);
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}
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return Failure;
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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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outs() << " " << Funcs[i]->getName();
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if (NumPrint < Funcs.size())
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outs() << "... <" << Funcs.size() << " total>";
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outs().flush();
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}
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void llvm::PrintGlobalVariableList(const std::vector<GlobalVariable*> &GVs) {
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unsigned NumPrint = GVs.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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outs() << " " << GVs[i]->getName();
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if (NumPrint < GVs.size())
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outs() << "... <" << GVs.size() << " total>";
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outs().flush();
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}
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