1/*
2 * Copyright 2012, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *     http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <string>
18#include <vector>
19
20#include <dlfcn.h>
21#include <stdlib.h>
22
23#include <llvm/ADT/STLExtras.h>
24#include <llvm/ADT/SmallString.h>
25#include <llvm/Config/config.h>
26#include <llvm/Support/CommandLine.h>
27#include <llvm/Support/FileSystem.h>
28#include <llvm/Support/MemoryBuffer.h>
29#include <llvm/Support/PluginLoader.h>
30#include <llvm/Support/raw_ostream.h>
31
32#include <bcc/BCCContext.h>
33#include <bcc/Compiler.h>
34#include <bcc/Config/Config.h>
35#include <bcc/ExecutionEngine/CompilerRTSymbolResolver.h>
36#include <bcc/ExecutionEngine/ObjectLoader.h>
37#include <bcc/ExecutionEngine/SymbolResolverProxy.h>
38#include <bcc/ExecutionEngine/SymbolResolvers.h>
39#include <bcc/Renderscript/RSCompilerDriver.h>
40#include <bcc/Script.h>
41#include <bcc/Source.h>
42#include <bcc/Support/CompilerConfig.h>
43#include <bcc/Support/Initialization.h>
44#include <bcc/Support/InputFile.h>
45#include <bcc/Support/OutputFile.h>
46
47using namespace bcc;
48
49#define STR2(a) #a
50#define STR(a) STR2(a)
51
52//===----------------------------------------------------------------------===//
53// General Options
54//===----------------------------------------------------------------------===//
55namespace {
56
57llvm::cl::opt<std::string>
58OptInputFilename(llvm::cl::Positional, llvm::cl::ValueRequired,
59                 llvm::cl::desc("<input bitcode file>"));
60
61llvm::cl::opt<std::string>
62OptOutputFilename("o", llvm::cl::desc("Specify the output filename"),
63                  llvm::cl::value_desc("filename"),
64                  llvm::cl::init("bcc_output"));
65
66llvm::cl::opt<std::string>
67OptBCLibFilename("bclib", llvm::cl::desc("Specify the bclib filename"),
68                 llvm::cl::value_desc("bclib"));
69
70llvm::cl::opt<std::string>
71OptOutputPath("output_path", llvm::cl::desc("Specify the output path"),
72              llvm::cl::value_desc("output path"),
73              llvm::cl::init("."));
74
75llvm::cl::opt<bool>
76OptEmitLLVM("emit-llvm",
77            llvm::cl::desc("Emit an LLVM-IR version of the generated program"));
78
79llvm::cl::opt<std::string>
80OptTargetTriple("mtriple",
81                llvm::cl::desc("Specify the target triple (default: "
82                               DEFAULT_TARGET_TRIPLE_STRING ")"),
83                llvm::cl::init(DEFAULT_TARGET_TRIPLE_STRING),
84                llvm::cl::value_desc("triple"));
85
86llvm::cl::alias OptTargetTripleC("C", llvm::cl::NotHidden,
87                                 llvm::cl::desc("Alias for -mtriple"),
88                                 llvm::cl::aliasopt(OptTargetTriple));
89
90llvm::cl::opt<bool>
91OptRSDebugContext("rs-debug-ctx",
92    llvm::cl::desc("Enable build to work with a RenderScript debug context"));
93
94//===----------------------------------------------------------------------===//
95// Compiler Options
96//===----------------------------------------------------------------------===//
97
98// RenderScript uses -O3 by default
99llvm::cl::opt<char>
100OptOptLevel("O", llvm::cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
101                                "(default: -O3)"),
102            llvm::cl::Prefix, llvm::cl::ZeroOrMore, llvm::cl::init('3'));
103
104// Override "bcc -version" since the LLVM version information is not correct on
105// Android build.
106void BCCVersionPrinter() {
107  llvm::raw_ostream &os = llvm::outs();
108  os << "libbcc (The Android Open Source Project, http://www.android.com/):\n"
109     << "  Default target: " << DEFAULT_TARGET_TRIPLE_STRING << "\n\n"
110     << "LLVM (http://llvm.org/):\n"
111     << "  Version: " << PACKAGE_VERSION << "\n";
112  return;
113}
114
115} // end anonymous namespace
116
117static inline
118bool ConfigCompiler(RSCompilerDriver &pRSCD) {
119  RSCompiler *RSC = pRSCD.getCompiler();
120  CompilerConfig *config = NULL;
121
122  config = new (std::nothrow) CompilerConfig(OptTargetTriple);
123  if (config == NULL) {
124    llvm::errs() << "Out of memory when create the compiler configuration!\n";
125    return false;
126  }
127
128  // llvm3.5 has removed the auto-detect feature for x86 subtarget,
129  // so set features explicitly in bcc.
130  if ((config->getTriple().find("i686") != std::string::npos) ||
131    (config->getTriple().find("x86_64") != std::string::npos)) {
132    std::vector<std::string> fv;
133
134#if defined(__SSE3__)
135    fv.push_back("+sse3");
136#endif
137#if defined(__SSSE3__)
138    fv.push_back("+ssse3");
139#endif
140#if defined(__SSE4_1__)
141    fv.push_back("+sse4.1");
142#endif
143#if defined(__SSE4_2__)
144    fv.push_back("+sse4.2");
145#endif
146
147    if (fv.size()) {
148      config->setFeatureString(fv);
149    }
150  }
151
152  switch (OptOptLevel) {
153    case '0': config->setOptimizationLevel(llvm::CodeGenOpt::None); break;
154    case '1': config->setOptimizationLevel(llvm::CodeGenOpt::Less); break;
155    case '2': config->setOptimizationLevel(llvm::CodeGenOpt::Default); break;
156    case '3':
157    default: {
158      config->setOptimizationLevel(llvm::CodeGenOpt::Aggressive);
159      break;
160    }
161  }
162
163  pRSCD.setConfig(config);
164  Compiler::ErrorCode result = RSC->config(*config);
165
166  if (OptRSDebugContext) {
167    pRSCD.setDebugContext(true);
168  }
169
170  if (result != Compiler::kSuccess) {
171    llvm::errs() << "Failed to configure the compiler! (detail: "
172                 << Compiler::GetErrorString(result) << ")\n";
173    return false;
174  }
175
176  return true;
177}
178
179int main(int argc, char **argv) {
180  llvm::cl::SetVersionPrinter(BCCVersionPrinter);
181  llvm::cl::ParseCommandLineOptions(argc, argv);
182  std::string commandLine = bcc::getCommandLine(argc, argv);
183  init::Initialize();
184
185  BCCContext context;
186  RSCompilerDriver RSCD;
187
188  if (OptBCLibFilename.empty()) {
189    ALOGE("Failed to compile bit code, -bclib was not specified");
190    return EXIT_FAILURE;
191  }
192
193  llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> mb_or_error =
194      llvm::MemoryBuffer::getFile(OptInputFilename.c_str());
195  if (mb_or_error.getError()) {
196    ALOGE("Failed to load bitcode from path %s! (%s)",
197          OptInputFilename.c_str(), mb_or_error.getError().message().c_str());
198    return EXIT_FAILURE;
199  }
200  std::unique_ptr<llvm::MemoryBuffer> input_data = std::move(mb_or_error.get());
201
202  const char *bitcode = input_data->getBufferStart();
203  size_t bitcodeSize = input_data->getBufferSize();
204
205  if (!ConfigCompiler(RSCD)) {
206    ALOGE("Failed to configure compiler");
207    return EXIT_FAILURE;
208  }
209
210  // Attempt to dynamically initialize the compiler driver if such a function
211  // is present. It is only present if passed via "-load libFOO.so".
212  RSCompilerDriverInit_t rscdi = (RSCompilerDriverInit_t)
213      dlsym(RTLD_DEFAULT, STR(RS_COMPILER_DRIVER_INIT_FN));
214  if (rscdi != NULL) {
215    rscdi(&RSCD);
216  }
217
218  bool built = RSCD.build(context, OptOutputPath.c_str(), OptOutputFilename.c_str(), bitcode,
219                          bitcodeSize, commandLine.c_str(), OptBCLibFilename.c_str(), NULL,
220                          OptEmitLLVM);
221
222  if (!built) {
223    return EXIT_FAILURE;
224  }
225
226  return EXIT_SUCCESS;
227}
228