source: icGREP/icgrep-devel/icgrep/lz4d_ext_dep.cpp @ 5924

Last change on this file since 5924 was 5924, checked in by cameron, 14 months ago

Various cleanups

File size: 3.8 KB
Line 
1/*
2 *  Copyright (c) 2017 International Characters.
3 *  This software is licensed to the public under the Open Software License 3.0.
4 *  icgrep is a trademark of International Characters.
5 */
6
7
8#include <llvm/IR/Module.h>
9#include <llvm/Linker/Linker.h>
10#include <llvm/Support/PrettyStackTrace.h>
11#include <llvm/Support/Signals.h>
12#include <llvm/Support/ManagedStatic.h>
13#include <IR_Gen/idisa_target.h>
14#include <boost/filesystem.hpp>
15#include <boost/iostreams/device/mapped_file.hpp>
16
17#include <lz4FrameDecoder.h>
18#include <cc/cc_compiler.h>
19#include <toolchain/toolchain.h>
20#include <kernels/cc_kernel.h>
21#include <kernels/streamset.h>
22#include <kernels/s2p_kernel.h>
23#include <kernels/kernel_builder.h>
24#include <toolchain/cpudriver.h>
25#include <llvm/Support/raw_ostream.h>
26#include <iostream>
27#include <lz4/LZ4Generator.h>
28#include <lz4/LZ4GeneratorNew.h>
29
30namespace re { class CC; }
31
32using namespace llvm;
33using namespace parabix;
34using namespace kernel;
35
36static cl::OptionCategory lz4dFlags("Command Flags", "lz4d options");
37static cl::opt<std::string> inputFile(cl::Positional, cl::desc("<input file>"), cl::Required, cl::cat(lz4dFlags));
38static cl::opt<std::string> outputFile(cl::Positional, cl::desc("<output file>"), cl::Required, cl::cat(lz4dFlags));
39static cl::opt<bool> overwriteOutput("f", cl::desc("Overwrite existing output file."), cl::init(false), cl::cat(lz4dFlags));
40
41
42static cl::OptionCategory lz4dDebugFlags("LZ4D Debug Flags", "lz4d debug options");
43static cl::opt<bool> extractOnly("extract-only", cl::desc("Only extract literal data to output file"), cl::init(false), cl::cat(lz4dDebugFlags));
44static cl::opt<bool> extractAndDepositOnly("extract-and-deposit-only", cl::desc("Only extract and deposit literal data to output file"), cl::init(false), cl::cat(lz4dDebugFlags));
45static cl::opt<bool> newApproach("new-approach", cl::desc("Use new approach"), cl::init(false), cl::cat(lz4dDebugFlags));
46
47
48int main(int argc, char *argv[]) {
49    // This boilerplate provides convenient stack traces and clean LLVM exit
50    // handling. It also initializes the built in support for convenient
51    // command line option handling.
52    sys::PrintStackTraceOnErrorSignal(argv[0]);
53    llvm::PrettyStackTraceProgram X(argc, argv);
54    llvm_shutdown_obj shutdown;
55    codegen::ParseCommandLineOptions(argc, argv, {&lz4dFlags, &lz4dDebugFlags, codegen::codegen_flags()});
56    std::string fileName = inputFile;
57    LZ4FrameDecoder lz4Frame(fileName);
58    if (!lz4Frame.isValid()) {
59        llvm::errs() << "Invalid LZ4 file.\n";
60        return -1;
61    }
62
63    if (boost::filesystem::exists(outputFile)) {
64        if (overwriteOutput) {
65            boost::filesystem::remove(outputFile);
66        } else {
67            llvm::errs() << outputFile + " existed. Use -f argument to overwrite.\n";
68            return -1;
69        }
70    }
71
72    boost::iostreams::mapped_file_source mappedFile;
73    // Since mmap offset has to be multiples of pages, we can't use it to skip headers.
74    mappedFile.open(fileName , lz4Frame.getBlocksLength() + lz4Frame.getBlocksStart());
75    size_t headerLength = lz4Frame.getBlocksStart();
76    //char *fileBuffer = const_cast<char *>(mappedFile.data()) + lz4Frame.getBlocksStart();
77    char *fileBuffer = const_cast<char *>(mappedFile.data());
78
79    if (codegen::SegmentSize < 2) {
80        codegen::SegmentSize = 2;
81    }
82
83    std::unique_ptr<LZ4Generator> g = newApproach? llvm::make_unique<LZ4GeneratorNew>(): llvm::make_unique<LZ4Generator>();
84
85    if (extractOnly) {
86        g->generateExtractOnlyPipeline(outputFile);
87    } else if (extractAndDepositOnly) {
88        g->generateExtractAndDepositOnlyPipeline(outputFile);
89    } else {
90        g->generatePipeline(outputFile);
91    }
92
93    auto main = g->getMainFunc();
94
95    main(fileBuffer, lz4Frame.getBlocksStart(), lz4Frame.getBlocksStart() + lz4Frame.getBlocksLength(), lz4Frame.hasBlockChecksum());
96
97    mappedFile.close();
98    return 0;
99}
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