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/Support/Allocator.h>
35
36#include "llvm/codegen.hpp"
37#include "llvm/compat.hpp"
38#include "llvm/metadata.hpp"
39#include "core/error.hpp"
40#include "util/algorithm.hpp"
41
42#include <map>
43#include <llvm/Config/llvm-config.h>
44#if LLVM_VERSION_MAJOR < 4
45#include <llvm/Bitcode/ReaderWriter.h>
46#else
47#include <llvm/Bitcode/BitcodeReader.h>
48#include <llvm/Bitcode/BitcodeWriter.h>
49#endif
50#include <llvm/Support/raw_ostream.h>
51
52using clover::binary;
53using namespace clover::llvm;
54
55namespace {
56   std::vector<char>
57   emit_code(const ::llvm::Module &mod) {
58      ::llvm::SmallVector<char, 1024> data;
59      ::llvm::raw_svector_ostream os { data };
60      ::llvm::WriteBitcodeToFile(mod, os);
61      return { os.str().begin(), os.str().end() };
62   }
63}
64
65std::string
66clover::llvm::print_module_bitcode(const ::llvm::Module &mod) {
67   std::string s;
68   ::llvm::raw_string_ostream os { s };
69   mod.print(os, NULL);
70   return os.str();
71}
72
73binary
74clover::llvm::build_module_library(const ::llvm::Module &mod,
75                                   enum binary::section::type section_type) {
76   binary b;
77   const auto code = emit_code(mod);
78   b.secs.emplace_back(0, section_type, code.size(), code);
79   return b;
80}
81
82std::unique_ptr< ::llvm::Module>
83clover::llvm::parse_module_library(const binary &b, ::llvm::LLVMContext &ctx,
84                                   std::string &r_log) {
85   auto mod = ::llvm::parseBitcodeFile(::llvm::MemoryBufferRef(
86                                        as_string(b.secs[0].data), " "), ctx);
87
88   if (::llvm::Error err = mod.takeError()) {
89      ::llvm::handleAllErrors(std::move(err), [&](::llvm::ErrorInfoBase &eib) {
90         fail(r_log, error(CL_INVALID_PROGRAM), eib.message());
91      });
92   }
93
94   return std::unique_ptr< ::llvm::Module>(std::move(*mod));
95}
96