source: icGREP/icgrep-devel/icgrep/lz4d.cpp @ 6040

Last change on this file since 6040 was 6036, checked in by cameron, 14 months ago

Missing includes

File size: 6.6 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 <toolchain/toolchain.h>
14
15#include <IR_Gen/idisa_target.h>
16#include <boost/filesystem.hpp>
17#include <boost/iostreams/device/mapped_file.hpp>
18
19#include <lz4FrameDecoder.h>
20#include <cc/cc_compiler.h>
21#include <kernels/cc_kernel.h>
22#include <kernels/streamset.h>
23#include <kernels/s2p_kernel.h>
24#include <kernels/source_kernel.h>
25#include <kernels/stdout_kernel.h>
26#include <kernels/lz4/lz4_index_decoder.h>
27#include <kernels/lz4/lz4_bytestream_decoder.h>
28
29#include <kernels/kernel_builder.h>
30#include <toolchain/cpudriver.h>
31#include <iostream>
32#include <llvm/Support/raw_ostream.h>
33namespace re { class CC; }
34
35using namespace llvm;
36using namespace parabix;
37using namespace kernel;
38
39static cl::OptionCategory lz4dFlags("Command Flags", "lz4d options");
40static cl::opt<std::string> inputFile(cl::Positional, cl::desc("<input file>"), cl::Required, cl::cat(lz4dFlags));
41static cl::opt<std::string> outputFile(cl::Positional, cl::desc("<output file>"), cl::Required, cl::cat(lz4dFlags));
42static cl::opt<bool> overwriteOutput("f", cl::desc("Overwrite existing output file."), cl::init(false), cl::cat(lz4dFlags));
43
44typedef void (*MainFunctionType)(char * byte_data, size_t filesize, bool hasBlockChecksum);
45
46void generatePipeline(ParabixDriver & pxDriver) {
47    auto & iBuilder = pxDriver.getBuilder();
48    Module * M = iBuilder->getModule();
49
50    Type * const sizeTy = iBuilder->getSizeTy();
51    Type * const boolTy = iBuilder->getIntNTy(sizeof(bool) * 8);
52    Type * const voidTy = iBuilder->getVoidTy();
53    Type * const inputType = iBuilder->getInt8PtrTy();
54   
55    Function * const main = cast<Function>(M->getOrInsertFunction("Main", voidTy, inputType, sizeTy, boolTy, nullptr));
56    main->setCallingConv(CallingConv::C);
57    Function::arg_iterator args = main->arg_begin();
58    Value * const inputStream = &*(args++);
59    inputStream->setName("input");
60    Value * const fileSize = &*(args++);
61    fileSize->setName("fileSize");
62    Value * const hasBlockChecksum = &*(args++);
63    hasBlockChecksum->setName("hasBlockChecksum");
64
65    const unsigned segmentSize = codegen::SegmentSize;
66    const unsigned bufferSegments = codegen::BufferSegments * codegen::ThreadNum;
67    // Output buffer should be at least one whole LZ4 block (4MB) large in case of uncompressed blocks.
68    // And the size (in bytes) also needs to be a power of two.
69    const unsigned decompressBufBlocks = (4 * 1024 * 1024) / codegen::BlockSize;
70
71    iBuilder->SetInsertPoint(BasicBlock::Create(M->getContext(), "entry", main, 0));
72
73    StreamSetBuffer * const ByteStream = pxDriver.addBuffer<SourceBuffer>(iBuilder, iBuilder->getStreamSetTy(1, 8));
74    StreamSetBuffer * const BasisBits = pxDriver.addBuffer<CircularBuffer>(iBuilder, iBuilder->getStreamSetTy(8, 1), segmentSize * bufferSegments);
75    StreamSetBuffer * const Extenders = pxDriver.addBuffer<CircularBuffer>(iBuilder, iBuilder->getStreamSetTy(1, 1), segmentSize * bufferSegments);
76    StreamSetBuffer * const LiteralIndexes = pxDriver.addBuffer<CircularBuffer>(iBuilder, iBuilder->getStreamSetTy(2, 32), segmentSize * bufferSegments);
77    StreamSetBuffer * const MatchIndexes = pxDriver.addBuffer<CircularBuffer>(iBuilder, iBuilder->getStreamSetTy(2, 32), segmentSize * bufferSegments);
78    StreamSetBuffer * const DecompressedByteStream = pxDriver.addBuffer<CircularBuffer>(iBuilder, iBuilder->getStreamSetTy(1, 8), decompressBufBlocks);
79
80   
81    kernel::Kernel * sourceK = pxDriver.addKernelInstance<MemorySourceKernel>(iBuilder);
82    sourceK->setInitialArguments({inputStream, fileSize});
83    pxDriver.makeKernelCall(sourceK, {}, {ByteStream});
84
85    // Input stream is not aligned due to the offset.
86    Kernel * s2pk = pxDriver.addKernelInstance<S2PKernel>(iBuilder, /*aligned = */ false);
87    pxDriver.makeKernelCall(s2pk, {ByteStream}, {BasisBits});
88   
89    Kernel * extenderK = pxDriver.addKernelInstance<ParabixCharacterClassKernelBuilder>(iBuilder, "extenders", std::vector<re::CC *>{re::makeCC(0xFF)}, 8);
90    pxDriver.makeKernelCall(extenderK, {BasisBits}, {Extenders});
91
92    Kernel * lz4iK = pxDriver.addKernelInstance<LZ4IndexDecoderKernel>(iBuilder);
93    lz4iK->setInitialArguments({iBuilder->CreateTrunc(hasBlockChecksum, iBuilder->getInt1Ty())});
94    pxDriver.makeKernelCall(lz4iK, {ByteStream, Extenders}, {LiteralIndexes, MatchIndexes});
95
96    Kernel * lz4bK = pxDriver.addKernelInstance<LZ4ByteStreamDecoderKernel>(iBuilder, decompressBufBlocks * codegen::BlockSize);
97    pxDriver.makeKernelCall(lz4bK, {LiteralIndexes, MatchIndexes, ByteStream}, {DecompressedByteStream});
98
99    Kernel * outK = pxDriver.addKernelInstance<FileSink>(iBuilder, 8);
100    outK->setInitialArguments({iBuilder->GetString(outputFile)});
101    pxDriver.makeKernelCall(outK, {DecompressedByteStream}, {});
102 
103    pxDriver.generatePipelineIR();
104
105    pxDriver.deallocateBuffers();
106
107    iBuilder->CreateRetVoid();
108 
109    pxDriver.finalizeObject();
110}
111
112int main(int argc, char *argv[]) {
113    // This boilerplate provides convenient stack traces and clean LLVM exit
114    // handling. It also initializes the built in support for convenient
115    // command line option handling.
116    sys::PrintStackTraceOnErrorSignal(argv[0]);
117    llvm::PrettyStackTraceProgram X(argc, argv);
118    llvm_shutdown_obj shutdown;
119    codegen::ParseCommandLineOptions(argc, argv, {&lz4dFlags, codegen::codegen_flags()});
120    std::string fileName = inputFile;
121    LZ4FrameDecoder lz4Frame(fileName);
122    if (!lz4Frame.isValid()) {
123        errs() << "Invalid LZ4 file.\n";
124        return -1;
125    }
126
127    if (boost::filesystem::exists(outputFile)) {
128        if (overwriteOutput) {
129            boost::filesystem::remove(outputFile);
130        } else {
131            errs() << outputFile + " existed. Use -f argument to overwrite.\n";
132            return -1;
133        }
134    }
135
136    boost::iostreams::mapped_file_source mappedFile;
137    // Since mmap offset has to be multiples of pages, we can't use it to skip headers.
138    mappedFile.open(fileName, lz4Frame.getBlocksLength() + lz4Frame.getBlocksStart());
139    char *fileBuffer = const_cast<char *>(mappedFile.data()) + lz4Frame.getBlocksStart();
140    ParabixDriver pxDriver("lz4d");
141    generatePipeline(pxDriver);
142    auto main = reinterpret_cast<MainFunctionType>(pxDriver.getMain());
143
144    main(fileBuffer, lz4Frame.getBlocksLength(), lz4Frame.hasBlockChecksum());
145
146    mappedFile.close();
147    return 0;
148}
Note: See TracBrowser for help on using the repository browser.