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Member "mesa-20.1.8/src/gallium/state_trackers/clover/llvm/codegen/bitcode.cpp" (16 Sep 2020, 3282 Bytes) of package /linux/misc/mesa-20.1.8.tar.xz:


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    1 //
    2 // Copyright 2012-2016 Francisco Jerez
    3 // Copyright 2012-2016 Advanced Micro Devices, Inc.
    4 //
    5 // Permission is hereby granted, free of charge, to any person obtaining a
    6 // copy of this software and associated documentation files (the "Software"),
    7 // to deal in the Software without restriction, including without limitation
    8 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
    9 // and/or sell copies of the Software, and to permit persons to whom the
   10 // Software is furnished to do so, subject to the following conditions:
   11 //
   12 // The above copyright notice and this permission notice shall be included in
   13 // all copies or substantial portions of the Software.
   14 //
   15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   18 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
   19 // OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   20 // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   21 // OTHER DEALINGS IN THE SOFTWARE.
   22 //
   23 
   24 ///
   25 /// \file
   26 /// Trivial codegen back-end that simply passes through the existing LLVM IR
   27 /// and either formats it so it can be consumed by pipe drivers (if
   28 /// build_module_bitcode() is used) or serializes so it can be deserialized at
   29 /// a later point and passed to the actual codegen back-end (if
   30 /// build_module_library() / parse_module_library() is used), potentially
   31 /// after linking against other bitcode object files.
   32 ///
   33 
   34 #include "llvm/codegen.hpp"
   35 #include "llvm/compat.hpp"
   36 #include "llvm/metadata.hpp"
   37 #include "core/error.hpp"
   38 #include "util/algorithm.hpp"
   39 
   40 #include <map>
   41 #include <llvm/Config/llvm-config.h>
   42 #if LLVM_VERSION_MAJOR < 4
   43 #include <llvm/Bitcode/ReaderWriter.h>
   44 #else
   45 #include <llvm/Bitcode/BitcodeReader.h>
   46 #include <llvm/Bitcode/BitcodeWriter.h>
   47 #endif
   48 #include <llvm/Support/raw_ostream.h>
   49 
   50 using namespace clover;
   51 using namespace clover::llvm;
   52 
   53 namespace {
   54    std::vector<char>
   55    emit_code(const ::llvm::Module &mod) {
   56       ::llvm::SmallVector<char, 1024> data;
   57       ::llvm::raw_svector_ostream os { data };
   58       compat::write_bitcode_to_file(mod, os);
   59       return { os.str().begin(), os.str().end() };
   60    }
   61 }
   62 
   63 std::string
   64 clover::llvm::print_module_bitcode(const ::llvm::Module &mod) {
   65    std::string s;
   66    ::llvm::raw_string_ostream os { s };
   67    mod.print(os, NULL);
   68    return os.str();
   69 }
   70 
   71 module
   72 clover::llvm::build_module_library(const ::llvm::Module &mod,
   73                                    enum module::section::type section_type) {
   74    module m;
   75    const auto code = emit_code(mod);
   76    m.secs.emplace_back(0, section_type, code.size(), code);
   77    return m;
   78 }
   79 
   80 std::unique_ptr< ::llvm::Module>
   81 clover::llvm::parse_module_library(const module &m, ::llvm::LLVMContext &ctx,
   82                                    std::string &r_log) {
   83    auto mod = ::llvm::parseBitcodeFile(::llvm::MemoryBufferRef(
   84                                         as_string(m.secs[0].data), " "), ctx);
   85 
   86    compat::handle_module_error(mod, [&](const std::string &s) {
   87          fail(r_log, error(CL_INVALID_PROGRAM), s);
   88       });
   89 
   90    return std::unique_ptr< ::llvm::Module>(std::move(*mod));
   91 }