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//===--- llvmc.cpp - The LLVM Compiler Driver -------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This tool provides a single point of access to the LLVM compilation tools.
// It has many options. To discover the options supported please refer to the
// tools' manual page (docs/CommandGuide/html/llvmc.html) or run the tool with
// the --help option.
//
//===----------------------------------------------------------------------===//
#include "CompilerDriver.h"
#include "Configuration.h"
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/System/Signals.h"
#include <iostream>
using namespace llvm;
//===----------------------------------------------------------------------===//
//=== PHASE OPTIONS
//===----------------------------------------------------------------------===//
static cl::opt<CompilerDriver::Phases> FinalPhase(cl::Optional,
cl::desc("Choose final phase of compilation:"),
cl::init(CompilerDriver::LINKING),
cl::values(
clEnumValN(CompilerDriver::PREPROCESSING,"E",
"Stop compilation after pre-processing phase"),
clEnumValN(CompilerDriver::TRANSLATION, "t",
"Stop compilation after translation phase"),
clEnumValN(CompilerDriver::OPTIMIZATION,"c",
"Stop compilation after optimization phase"),
clEnumValN(CompilerDriver::ASSEMBLY,"S",
"Stop compilation after assembly phase"),
clEnumValEnd
)
);
//===----------------------------------------------------------------------===//
//=== OPTIMIZATION OPTIONS
//===----------------------------------------------------------------------===//
static cl::opt<CompilerDriver::OptimizationLevels> OptLevel(cl::ZeroOrMore,
cl::desc("Choose level of optimization to apply:"),
cl::init(CompilerDriver::OPT_FAST_COMPILE),
cl::values(
clEnumValN(CompilerDriver::OPT_FAST_COMPILE,"O0",
"An alias for the -O1 option"),
clEnumValN(CompilerDriver::OPT_FAST_COMPILE,"O1",
"Optimize for compilation speed, not execution speed"),
clEnumValN(CompilerDriver::OPT_SIMPLE,"O2",
"Perform simple translation time optimizations"),
clEnumValN(CompilerDriver::OPT_AGGRESSIVE,"O3",
"Perform aggressive translation time optimizations"),
clEnumValN(CompilerDriver::OPT_LINK_TIME,"O4",
"Perform link time optimizations"),
clEnumValN(CompilerDriver::OPT_AGGRESSIVE_LINK_TIME,"O5",
"Perform aggressive link time optimizations"),
clEnumValEnd
)
);
//===----------------------------------------------------------------------===//
//=== TOOL OPTIONS
//===----------------------------------------------------------------------===//
static cl::list<std::string> PreprocessorToolOpts("Tpre", cl::ZeroOrMore,
cl::desc("Pass specific options to the pre-processor"),
cl::value_desc("option"));
static cl::alias PreprocessorToolOptsAlias("Wp,", cl::ZeroOrMore,
cl::desc("Alias for -Tpre"), cl::aliasopt(PreprocessorToolOpts));
static cl::list<std::string> TranslatorToolOpts("Ttrn", cl::ZeroOrMore,
cl::desc("Pass specific options to the assembler"),
cl::value_desc("option"));
static cl::list<std::string> AssemblerToolOpts("Tasm", cl::ZeroOrMore,
cl::desc("Pass specific options to the assembler"),
cl::value_desc("option"));
static cl::alias AssemblerToolOptsAlias("Wa,", cl::ZeroOrMore,
cl::desc("Alias for -Tasm"), cl::aliasopt(AssemblerToolOpts));
static cl::list<std::string> OptimizerToolOpts("Topt", cl::ZeroOrMore,
cl::desc("Pass specific options to the optimizer"),
cl::value_desc("option"));
static cl::list<std::string> LinkerToolOpts("Tlnk", cl::ZeroOrMore,
cl::desc("Pass specific options to the linker"),
cl::value_desc("option"));
static cl::alias LinkerToolOptsAlias("Wl,", cl::ZeroOrMore,
cl::desc("Alias for -Tlnk"), cl::aliasopt(LinkerToolOpts));
static cl::list<std::string> fOpts("f", cl::ZeroOrMore, cl::Prefix,
cl::desc("Pass through -f options to compiler tools"),
cl::value_desc("option"));
static cl::list<std::string> MOpts("M", cl::ZeroOrMore, cl::Prefix,
cl::desc("Pass through -M options to compiler tools"),
cl::value_desc("option"));
static cl::list<std::string> WOpts("W", cl::ZeroOrMore, cl::Prefix,
cl::desc("Pass through -W options to compiler tools"),
cl::value_desc("option"));
static cl::list<std::string> BOpt("B", cl::ZeroOrMore, cl::Prefix,
cl::desc("Specify path to find llvmc sub-tools"),
cl::value_desc("dir"));
//===----------------------------------------------------------------------===//
//=== INPUT OPTIONS
//===----------------------------------------------------------------------===//
static cl::list<std::string> LibPaths("L", cl::Prefix,
cl::desc("Specify a library search path"), cl::value_desc("dir"));
static cl::list<std::string> Libraries("l", cl::Prefix,
cl::desc("Specify base name of libraries to link to"), cl::value_desc("lib"));
static cl::list<std::string> Includes("I", cl::Prefix,
cl::desc("Specify location to search for included source"),
cl::value_desc("dir"));
static cl::list<std::string> Defines("D", cl::Prefix,
cl::desc("Specify a pre-processor symbol to define"),
cl::value_desc("symbol"));
//===----------------------------------------------------------------------===//
//=== OUTPUT OPTIONS
//===----------------------------------------------------------------------===//
static cl::opt<std::string> OutputFilename("o",
cl::desc("Override output filename"), cl::value_desc("file"));
static cl::opt<std::string> OutputMachine("m", cl::Prefix,
cl::desc("Specify a target machine"), cl::value_desc("machine"));
static cl::opt<bool> Native("native", cl::init(false),
cl::desc("Generative native code instead of bitcode"));
static cl::opt<bool> DebugOutput("g", cl::init(false),
cl::desc("Generate objects that include debug symbols"));
static cl::opt<bool> StripOutput("strip", cl::init(false),
cl::desc("Strip all symbols from linked output file"));
static cl::opt<std::string> PrintFileName("print-fname", cl::Optional,
cl::value_desc("file"),
cl::desc("Print the full path for the option's value"));
//===----------------------------------------------------------------------===//
//=== INFORMATION OPTIONS
//===----------------------------------------------------------------------===//
static cl::opt<bool> DryRun("dry-run", cl::Optional, cl::init(false),
cl::desc("Do everything but perform the compilation actions"));
static cl::alias DryRunAlias("y", cl::Optional,
cl::desc("Alias for -dry-run"), cl::aliasopt(DryRun));
static cl::opt<bool> Verbose("verbose", cl::Optional, cl::init(false),
cl::desc("Print out each action taken"));
static cl::alias VerboseAlias("v", cl::Optional,
cl::desc("Alias for -verbose"), cl::aliasopt(Verbose));
static cl::opt<bool> Debug("debug", cl::Optional, cl::init(false),
cl::Hidden, cl::desc("Print out debugging information"));
static cl::alias DebugAlias("d", cl::Optional,
cl::desc("Alias for -debug"), cl::aliasopt(Debug));
static cl::opt<bool> TimeActions("time-actions", cl::Optional, cl::init(false),
cl::desc("Print execution time for each action taken"));
static cl::opt<bool> ShowStats("stats", cl::Optional, cl::init(false),
cl::desc("Print statistics accumulated during optimization"));
//===----------------------------------------------------------------------===//
//=== ADVANCED OPTIONS
//===----------------------------------------------------------------------===//
static cl::opt<std::string> ConfigDir("config-dir", cl::Optional,
cl::desc("Specify configuration directory to override defaults"),
cl::value_desc("dir"));
static cl::opt<bool> EmitRawCode("emit-raw-code", cl::Hidden, cl::Optional,
cl::desc("Emit raw, unoptimized code"));
static cl::opt<bool> PipeCommands("pipe", cl::Optional,
cl::desc("Invoke sub-commands by linking input/output with pipes"));
static cl::opt<bool> KeepTemps("keep-temps", cl::Optional,
cl::desc("Don't delete temporary files created by llvmc"));
//===----------------------------------------------------------------------===//
//=== POSITIONAL OPTIONS
//===----------------------------------------------------------------------===//
static cl::list<std::string> Files(cl::Positional, cl::ZeroOrMore,
cl::desc("[Sources/objects/libraries]"));
static cl::list<std::string> Languages("x", cl::ZeroOrMore,
cl::desc("Specify the source language for subsequent files"),
cl::value_desc("language"));
//===----------------------------------------------------------------------===//
//=== GetFileType - determine type of a file
//===----------------------------------------------------------------------===//
static const std::string GetFileType(const std::string& fname, unsigned pos) {
static std::vector<std::string>::iterator langIt = Languages.begin();
static std::string CurrLang = "";
// If a -x LANG option has been specified ..
if (langIt != Languages.end())
// If the -x LANG option came before the current file on command line
if (Languages.getPosition( langIt - Languages.begin() ) < pos) {
// use that language
CurrLang = *langIt++;
return CurrLang;
}
// If there's a current language in effect
if (!CurrLang.empty())
return CurrLang; // use that language
// otherwise just determine lang from the filename's suffix
return fname.substr(fname.rfind('.', fname.size()) + 1);
}
static void handleTerminatingOptions(CompilerDriver* CD) {
if (!PrintFileName.empty()) {
sys::Path path = CD->GetPathForLinkageItem(PrintFileName, false);
std::string p = path.toString();
if (p.empty())
std::cout << "Can't locate `" << PrintFileName << "'.\n";
else
std::cout << p << '\n';
exit(0);
}
}
/// @brief The main program for llvmc
int main(int argc, char **argv) {
llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
// Make sure we print stack trace if we get bad signals
sys::PrintStackTraceOnErrorSignal();
std::cout << "NOTE: llvmc is highly experimental and mostly useless right "
"now.\nPlease use llvm-gcc directly instead.\n\n";
try {
// Parse the command line options
cl::ParseCommandLineOptions(argc, argv,
"LLVM Compiler Driver (llvmc)\n\n"
" This program provides easy invocation of the LLVM tool set\n"
" and other compiler tools.\n"
);
// Deal with unimplemented options.
if (PipeCommands)
throw std::string("Not implemented yet: -pipe");
if (OutputFilename.empty())
if (OptLevel == CompilerDriver::LINKING)
OutputFilename = "a.out";
// Construct the ConfigDataProvider object
LLVMC_ConfigDataProvider Provider;
Provider.setConfigDir(sys::Path(ConfigDir));
// Construct the CompilerDriver object
CompilerDriver* CD = CompilerDriver::Get(Provider);
// If the LLVM_LIB_SEARCH_PATH environment variable is
// set, append it to the list of places to search for libraries
char *srchPath = getenv("LLVM_LIB_SEARCH_PATH");
if (srchPath != NULL && strlen(srchPath) != 0)
LibPaths.push_back(std::string(srchPath));
// Set the driver flags based on command line options
unsigned flags = 0;
if (Verbose) flags |= CompilerDriver::VERBOSE_FLAG;
if (Debug) flags |= CompilerDriver::DEBUG_FLAG;
if (DryRun) flags |= CompilerDriver::DRY_RUN_FLAG;
if (Native) flags |= CompilerDriver::EMIT_NATIVE_FLAG;
if (EmitRawCode) flags |= CompilerDriver::EMIT_RAW_FLAG;
if (KeepTemps) flags |= CompilerDriver::KEEP_TEMPS_FLAG;
if (ShowStats) flags |= CompilerDriver::SHOW_STATS_FLAG;
if (TimeActions) flags |= CompilerDriver::TIME_ACTIONS_FLAG;
if (StripOutput) flags |= CompilerDriver::STRIP_OUTPUT_FLAG;
CD->setDriverFlags(flags);
// Specify required parameters
CD->setFinalPhase(FinalPhase);
CD->setOptimization(OptLevel);
CD->setOutputMachine(OutputMachine);
CD->setIncludePaths(Includes);
CD->setSymbolDefines(Defines);
CD->setLibraryPaths(LibPaths);
CD->setfPassThrough(fOpts);
CD->setMPassThrough(MOpts);
CD->setWPassThrough(WOpts);
// Provide additional tool arguments
if (!PreprocessorToolOpts.empty())
CD->setPhaseArgs(CompilerDriver::PREPROCESSING, PreprocessorToolOpts);
if (!TranslatorToolOpts.empty())
CD->setPhaseArgs(CompilerDriver::TRANSLATION, TranslatorToolOpts);
if (!OptimizerToolOpts.empty())
CD->setPhaseArgs(CompilerDriver::OPTIMIZATION, OptimizerToolOpts);
if (!AssemblerToolOpts.empty())
CD->setPhaseArgs(CompilerDriver::ASSEMBLY,AssemblerToolOpts);
if (!LinkerToolOpts.empty())
CD->setPhaseArgs(CompilerDriver::LINKING, LinkerToolOpts);
// Check for options that cause us to terminate before any significant work
// is done.
handleTerminatingOptions(CD);
// Prepare the list of files to be compiled by the CompilerDriver.
CompilerDriver::InputList InpList;
std::vector<std::string>::iterator fileIt = Files.begin();
std::vector<std::string>::iterator libIt = Libraries.begin();
unsigned libPos = 0, filePos = 0;
while ( 1 ) {
if (libIt != Libraries.end())
libPos = Libraries.getPosition( libIt - Libraries.begin() );
else
libPos = 0;
if (fileIt != Files.end())
filePos = Files.getPosition(fileIt - Files.begin());
else
filePos = 0;
if (filePos != 0 && (libPos == 0 || filePos < libPos)) {
// Add a source file
InpList.push_back(std::make_pair(*fileIt,
GetFileType(*fileIt, filePos)));
++fileIt;
} else if ( libPos != 0 && (filePos == 0 || libPos < filePos) ) {
// Add a library
InpList.push_back(std::make_pair(*libIt++, ""));
}
else
break; // we're done with the list
}
// Tell the driver to do its thing
std::string ErrMsg;
int result = CD->execute(InpList, sys::Path(OutputFilename), ErrMsg);
if (result != 0) {
std::cerr << argv[0] << ": " << ErrMsg << '\n';
return result;
}
// All is good, return success
return 0;
} catch (const std::string& msg) {
std::cerr << argv[0] << ": " << msg << '\n';
} catch (...) {
std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
return 1;
}