llvm-reduce.cpp | Explore in Territory

//===- llvm-reduce.cpp - The LLVM Delta Reduction utility -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This program tries to reduce an IR test case for a given interesting-ness
// test. It runs multiple delta debugging passes in order to minimize the input
// file. It's worth noting that this is a part of the bugpoint redesign
// proposal, and thus a *temporary* tool that will eventually be integrated
// into the bugpoint tool itself.
//
//===----------------------------------------------------------------------===//

#include "DeltaManager.h"
#include "ReducerWorkItem.h"
#include "TestRunner.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/CodeGen/CommandFlags.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBufferRef.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/WithColor.h"
#include "llvm/Support/raw_ostream.h"
#include <system_error>

#ifdef _WIN32
#include <windows.h>
#endif

usingnamespacellvm;

cl::OptionCategory LLVMReduceOptions("llvm-reduce options");

static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden,
                          cl::cat(LLVMReduceOptions));
static cl::opt<bool> Version("v", cl::desc("Alias for -version"), cl::Hidden,
                             cl::cat(LLVMReduceOptions));

static cl::opt<bool> PreserveDebugEnvironment(
    "preserve-debug-environment",
    cl::desc("Don't disable features used for crash "
             "debugging (crash reports, llvm-symbolizer and core dumps)"),
    cl::cat(LLVMReduceOptions));

static cl::opt<bool>
    PrintDeltaPasses("print-delta-passes",
                     cl::desc("Print list of delta passes, passable to "
                              "--delta-passes as a comma separated list"),
                     cl::cat(LLVMReduceOptions));

static cl::opt<std::string> InputFilename(cl::Positional,
                                          cl::desc("<input llvm ll/bc file>"),
                                          cl::cat(LLVMReduceOptions));

static cl::opt<std::string>
    TestFilename("test",
                 cl::desc("Name of the interesting-ness test to be run"),
                 cl::cat(LLVMReduceOptions));

static cl::list<std::string>
    TestArguments("test-arg",
                  cl::desc("Arguments passed onto the interesting-ness test"),
                  cl::cat(LLVMReduceOptions));

static cl::opt<std::string> OutputFilename(
    "output",
    cl::desc("Specify the output file. default: reduced.ll|.bc|.mir"));
static cl::alias OutputFileAlias("o", cl::desc("Alias for -output"),
                                 cl::aliasopt(OutputFilename),
                                 cl::cat(LLVMReduceOptions));

static cl::opt<bool>
    ReplaceInput("in-place",
                 cl::desc("WARNING: This option will replace your input file "
                          "with the reduced version!"),
                 cl::cat(LLVMReduceOptions));

enum class InputLanguages { … };

static cl::opt<InputLanguages>
    InputLanguage("x", cl::ValueOptional,
                  cl::desc("Input language ('ir' or 'mir')"),
                  cl::init(InputLanguages::None),
                  cl::values(clEnumValN(InputLanguages::IR, "ir", ""),
                             clEnumValN(InputLanguages::MIR, "mir", "")),
                  cl::cat(LLVMReduceOptions));

static cl::opt<bool> ForceOutputBitcode(
    "output-bitcode",
    cl::desc("Emit final result as bitcode instead of text IR"), cl::Hidden,
    cl::cat(LLVMReduceOptions));

static cl::opt<int>
    MaxPassIterations("max-pass-iterations",
                      cl::desc("Maximum number of times to run the full set "
                               "of delta passes (default=5)"),
                      cl::init(5), cl::cat(LLVMReduceOptions));

extern cl::opt<cl::boolOrDefault> PreserveInputDbgFormat;

static codegen::RegisterCodeGenFlags CGF;

/// Turn off crash debugging features
///
/// Crash is expected, so disable crash reports and symbolization to reduce
/// output clutter and avoid potentially slow symbolization.
static void disableEnvironmentDebugFeatures() { … }

static std::pair<StringRef, bool> determineOutputType(bool IsMIR,
                                                      bool InputIsBitcode) { … }

int main(int Argc, char **Argv) { … }
llvm/llvm/tools/llvm-reduce/llvm-reduce.cpp
