1 //===--- llvmc.cpp - The LLVM Compiler Driver -------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Reid Spencer and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This tool provides a single point of access to the LLVM compilation tools.
11 // It has many options. To discover the options supported please refer to the
12 // tools' manual page (docs/CommandGuide/html/llvmc.html) or run the tool with
15 //===------------------------------------------------------------------------===
17 #include "CompilerDriver.h"
18 #include "Configuration.h"
19 #include "llvm/Pass.h"
20 #include "llvm/System/Signals.h"
21 #include "llvm/Support/CommandLine.h"
27 //===------------------------------------------------------------------------===
29 //===------------------------------------------------------------------------===
30 cl::opt<CompilerDriver::Phases> FinalPhase(
31 cl::desc("Choose final phase of compilation:"),
32 cl::init(CompilerDriver::LINKING),
34 clEnumValN(CompilerDriver::PREPROCESSING,"E",
35 "Stop compilation after pre-processing phase"),
36 clEnumValN(CompilerDriver::TRANSLATION, "t",
37 "Stop compilation after translation phase"),
38 clEnumValN(CompilerDriver::OPTIMIZATION,"c",
39 "Stop compilation after optimization phase"),
40 clEnumValN(CompilerDriver::ASSEMBLY,"S",
41 "Stop compilation after assembly phase"),
46 //===------------------------------------------------------------------------===
47 //=== OPTIMIZATION OPTIONS
48 //===------------------------------------------------------------------------===
49 cl::opt<CompilerDriver::OptimizationLevels> OptLevel(
50 cl::desc("Choose level of optimization to apply:"),
51 cl::init(CompilerDriver::OPT_FAST_COMPILE),
53 clEnumValN(CompilerDriver::OPT_FAST_COMPILE,"O0",
54 "An alias for the -O1 option."),
55 clEnumValN(CompilerDriver::OPT_FAST_COMPILE,"O1",
56 "Optimize for compilation speed, not execution speed."),
57 clEnumValN(CompilerDriver::OPT_SIMPLE,"O2",
58 "Perform simple translation time optimizations"),
59 clEnumValN(CompilerDriver::OPT_AGGRESSIVE,"O3",
60 "Perform aggressive translation time optimizations"),
61 clEnumValN(CompilerDriver::OPT_LINK_TIME,"O4",
62 "Perform link time optimizations"),
63 clEnumValN(CompilerDriver::OPT_AGGRESSIVE_LINK_TIME,"O5",
64 "Perform aggressive link time optimizations"),
69 //===------------------------------------------------------------------------===
71 //===------------------------------------------------------------------------===
73 cl::list<std::string> PreprocessorToolOpts("Tpre", cl::ZeroOrMore,
74 cl::desc("Pass specific options to the pre-processor"),
75 cl::value_desc("option"));
77 cl::list<std::string> TranslatorToolOpts("Ttrn", cl::ZeroOrMore,
78 cl::desc("Pass specific options to the assembler"),
79 cl::value_desc("option"));
81 cl::list<std::string> AssemblerToolOpts("Tasm", cl::ZeroOrMore,
82 cl::desc("Pass specific options to the assembler"),
83 cl::value_desc("option"));
85 cl::list<std::string> OptimizerToolOpts("Topt", cl::ZeroOrMore,
86 cl::desc("Pass specific options to the optimizer"),
87 cl::value_desc("option"));
89 cl::list<std::string> LinkerToolOpts("Tlnk", cl::ZeroOrMore,
90 cl::desc("Pass specific options to the linker"),
91 cl::value_desc("option"));
93 cl::list<std::string> fOpts("f", cl::ZeroOrMore, cl::Prefix,
94 cl::desc("Pass through -f options to compiler tools"),
95 cl::value_desc("optimization option"));
97 cl::list<std::string> MOpts("M", cl::ZeroOrMore, cl::Prefix,
98 cl::desc("Pass through -M options to compiler tools"),
99 cl::value_desc("dependency option"));
101 cl::list<std::string> WOpts("W", cl::ZeroOrMore, cl::Prefix,
102 cl::desc("Pass through -W options to compiler tools"),
103 cl::value_desc("warnings category"));
105 //===------------------------------------------------------------------------===
107 //===------------------------------------------------------------------------===
109 cl::list<std::string> LibPaths("L", cl::Prefix,
110 cl::desc("Specify a library search path"), cl::value_desc("directory"));
112 cl::list<std::string> Libraries("l", cl::Prefix,
113 cl::desc("Specify libraries to link to"), cl::value_desc("library prefix"));
115 cl::list<std::string> Includes("I", cl::Prefix,
116 cl::desc("Specify location to search for included source"),
117 cl::value_desc("include directory"));
119 cl::list<std::string> Defines("D", cl::Prefix,
120 cl::desc("Specify a symbol to define for source configuration"),
121 cl::value_desc("symbol definition"));
124 //===------------------------------------------------------------------------===
126 //===------------------------------------------------------------------------===
128 cl::opt<std::string> OutputFilename("o",
129 cl::desc("Override output filename"), cl::value_desc("filename"));
131 cl::opt<bool> ForceOutput("F", cl::Optional, cl::init(false),
132 cl::desc("Force output files to be overridden"));
134 cl::opt<std::string> OutputMachine("m", cl::Prefix,
135 cl::desc("Specify a target machine"), cl::value_desc("machine"));
137 cl::opt<bool> Native("native", cl::init(false),
138 cl::desc("Generative native object and executables instead of bytecode"));
140 cl::opt<bool> DebugOutput("g", cl::init(false),
141 cl::desc("Generate objects that include debug symbols"));
143 cl::opt<bool> StripOutput("strip", cl::init(false),
144 cl::desc("Strip all symbols from linked output file"));
146 //===------------------------------------------------------------------------===
147 //=== INFORMATION OPTIONS
148 //===------------------------------------------------------------------------===
150 cl::opt<bool> DryRun("dry-run", cl::Optional, cl::init(false),
151 cl::desc("Do everything but perform the compilation actions"));
153 cl::alias DryRunAlias("y", cl::Optional,
154 cl::desc("Alias for -dry-run"), cl::aliasopt(DryRun));
156 cl::opt<bool> Verbose("verbose", cl::Optional, cl::init(false),
157 cl::desc("Print out each action taken"));
159 cl::alias VerboseAlias("v", cl::Optional,
160 cl::desc("Alias for -verbose"), cl::aliasopt(Verbose));
162 cl::opt<bool> Debug("debug", cl::Optional, cl::init(false),
163 cl::Hidden, cl::desc("Print out debugging information"));
165 cl::alias DebugAlias("d", cl::Optional,
166 cl::desc("Alias for -debug"), cl::aliasopt(Debug));
168 cl::opt<bool> TimeActions("time-actions", cl::Optional, cl::init(false),
169 cl::desc("Print execution time for each action taken"));
171 cl::opt<bool> ShowStats("stats", cl::Optional, cl::init(false),
172 cl::desc("Print statistics accumulated during optimization"));
174 //===------------------------------------------------------------------------===
175 //=== ADVANCED OPTIONS
176 //===------------------------------------------------------------------------===
178 static cl::opt<std::string> ConfigDir("config-dir", cl::Optional,
179 cl::desc("Specify a configuration directory to override defaults"),
180 cl::value_desc("directory"));
182 static cl::opt<bool> EmitRawCode("emit-raw-code", cl::Hidden, cl::Optional,
183 cl::desc("Emit raw, unoptimized code"));
185 static cl::opt<bool> PipeCommands("pipe", cl::Optional,
186 cl::desc("Invoke sub-commands by linking input/output with pipes"));
188 static cl::opt<bool> KeepTemps("keep-temps", cl::Optional,
189 cl::desc("Don't delete the temporary files created during compilation"));
191 //===------------------------------------------------------------------------===
192 //=== POSITIONAL OPTIONS
193 //===------------------------------------------------------------------------===
195 static cl::list<std::string> Files(cl::Positional, cl::OneOrMore,
196 cl::desc("[Sources/objects/libraries]"));
198 static cl::list<std::string> Languages("x", cl::ZeroOrMore,
199 cl::desc("Specify the source language for subsequent files"),
200 cl::value_desc("language"));
202 //===------------------------------------------------------------------------===
203 //=== GetFileType - determine type of a file
204 //===------------------------------------------------------------------------===
205 const std::string GetFileType(const std::string& fname, unsigned pos ) {
206 static std::vector<std::string>::iterator langIt = Languages.begin();
207 static std::string CurrLang = "";
209 // If a -x LANG option has been specified ..
210 if ( langIt != Languages.end() )
211 // If the -x LANG option came before the current file on command line
212 if ( Languages.getPosition( langIt - Languages.begin() ) < pos ) {
214 CurrLang = *langIt++;
218 // If there's a current language in effect
219 if (!CurrLang.empty())
220 return CurrLang; // use that language
222 // otherwise just determine lang from the filename's suffix
223 return fname.substr( fname.rfind('.',fname.size()) + 1 );
226 } // end anonymous namespace
229 /// @brief The main program for llvmc
230 int main(int argc, char **argv) {
231 // Make sure we print stack trace if we get bad signals
232 sys::PrintStackTraceOnErrorSignal();
236 // Parse the command line options
237 cl::ParseCommandLineOptions(argc, argv,
238 " LLVM Compiler Driver (llvmc)\n\n"
239 " This program provides easy invocation of the LLVM tool set\n"
240 " and other compiler tools.\n"
243 // Deal with unimplemented options.
245 throw std::string("Not implemented yet: -pipe");
247 if (OutputFilename.empty())
248 if (OptLevel == CompilerDriver::LINKING)
249 OutputFilename = "a.out";
251 throw std::string("An output file must be specified. Please use the -o option");
253 // Construct the ConfigDataProvider object
254 LLVMC_ConfigDataProvider Provider;
255 Provider.setConfigDir(sys::Path(ConfigDir));
257 // Construct the CompilerDriver object
258 CompilerDriver* CD = CompilerDriver::Get(Provider);
260 // If the LLVM_LIB_SEARCH_PATH environment variable is
261 // set, append it to the list of places to search for libraries
262 std::string srchPath = getenv("LLVM_LIB_SEARCH_PATH");
263 if (!srchPath.empty())
264 LibPaths.push_back(srchPath);
266 // Set the driver flags based on command line options
268 if (Verbose) flags |= CompilerDriver::VERBOSE_FLAG;
269 if (Debug) flags |= CompilerDriver::DEBUG_FLAG;
270 if (DryRun) flags |= CompilerDriver::DRY_RUN_FLAG;
271 if (ForceOutput) flags |= CompilerDriver::FORCE_FLAG;
272 if (Native) flags |= CompilerDriver::EMIT_NATIVE_FLAG;
273 if (EmitRawCode) flags |= CompilerDriver::EMIT_RAW_FLAG;
274 if (KeepTemps) flags |= CompilerDriver::KEEP_TEMPS_FLAG;
275 if (ShowStats) flags |= CompilerDriver::SHOW_STATS_FLAG;
276 if (TimeActions) flags |= CompilerDriver::TIME_ACTIONS_FLAG;
277 if (TimePassesIsEnabled) flags |= CompilerDriver::TIME_PASSES_FLAG;
278 if (StripOutput) flags |= CompilerDriver::STRIP_OUTPUT_FLAG;
279 CD->setDriverFlags(flags);
281 // Specify requred parameters
282 CD->setFinalPhase(FinalPhase);
283 CD->setOptimization(OptLevel);
284 CD->setOutputMachine(OutputMachine);
285 CD->setIncludePaths(Includes);
286 CD->setSymbolDefines(Defines);
287 CD->setLibraryPaths(LibPaths);
288 CD->setfPassThrough(fOpts);
289 CD->setMPassThrough(MOpts);
290 CD->setWPassThrough(WOpts);
292 // Provide additional tool arguments
293 if (!PreprocessorToolOpts.empty())
294 CD->setPhaseArgs(CompilerDriver::PREPROCESSING, PreprocessorToolOpts);
295 if (!TranslatorToolOpts.empty())
296 CD->setPhaseArgs(CompilerDriver::TRANSLATION, TranslatorToolOpts);
297 if (!OptimizerToolOpts.empty())
298 CD->setPhaseArgs(CompilerDriver::OPTIMIZATION, OptimizerToolOpts);
299 if (!AssemblerToolOpts.empty())
300 CD->setPhaseArgs(CompilerDriver::ASSEMBLY,AssemblerToolOpts);
301 if (!LinkerToolOpts.empty())
302 CD->setPhaseArgs(CompilerDriver::LINKING, LinkerToolOpts);
304 // Prepare the list of files to be compiled by the CompilerDriver.
305 CompilerDriver::InputList InpList;
306 std::vector<std::string>::iterator fileIt = Files.begin();
307 std::vector<std::string>::iterator libIt = Libraries.begin();
308 unsigned libPos = 0, filePos = 0;
310 if ( libIt != Libraries.end() )
311 libPos = Libraries.getPosition( libIt - Libraries.begin() );
314 if ( fileIt != Files.end() )
315 filePos = Files.getPosition( fileIt - Files.begin() );
319 if ( filePos != 0 && (libPos == 0 || filePos < libPos) ) {
321 InpList.push_back( std::make_pair(*fileIt, GetFileType(*fileIt,filePos)));
324 else if ( libPos != 0 && (filePos == 0 || libPos < filePos) ) {
326 InpList.push_back( std::make_pair(*libIt++,""));
329 break; // we're done with the list
332 // Tell the driver to do its thing
333 int result = CD->execute(InpList,sys::Path(OutputFilename));
335 throw std::string("Error executing actions. Terminated.");
339 // All is good, return success
341 } catch (const std::string& msg) {
342 std::cerr << argv[0] << ": " << msg << "\n";
344 std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";