//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is the llc code generator driver. It provides a convenient
// command-line interface for generating native assembly-language code
-// or C code, given LLVM bytecode.
+// or C code, given LLVM bitcode.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Target/SubtargetFeature.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetMachineRegistry.h"
-#include "llvm/Transforms/Scalar.h"
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Pass.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Support/IRReader.h"
+#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
+#include "llvm/CodeGen/LinkAllCodegenComponents.h"
+#include "llvm/Config/config.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PluginLoader.h"
-#include "llvm/Support/PassNameParser.h"
-#include "llvm/Analysis/Verifier.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/System/Host.h"
#include "llvm/System/Signals.h"
-#include "llvm/Config/config.h"
-#include <fstream>
-#include <iostream>
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegistry.h"
+#include "llvm/Target/TargetSelect.h"
#include <memory>
-
using namespace llvm;
// General options for llc. Other pass-specific options are specified
// and back-end code generation options are specified with the target machine.
//
static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
static cl::opt<std::string>
OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));
-static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
+static cl::opt<bool>
+Force("f", cl::desc("Enable binary output on terminals"));
+
+// Determine optimization level.
+static cl::opt<char>
+OptLevel("O",
+ cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
+ "(default = '-O2')"),
+ cl::Prefix,
+ cl::ZeroOrMore,
+ cl::init(' '));
+
+static cl::opt<std::string>
+TargetTriple("mtriple", cl::desc("Override target triple for module"));
-static cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
-MArch("march", cl::desc("Architecture to generate code for:"));
+static cl::opt<std::string>
+MArch("march", cl::desc("Architecture to generate code for (see --version)"));
static cl::opt<std::string>
-MCPU("mcpu",
+MCPU("mcpu",
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
cl::value_desc("cpu-name"),
cl::init(""));
static cl::list<std::string>
-MAttrs("mattr",
+MAttrs("mattr",
cl::CommaSeparated,
cl::desc("Target specific attributes (-mattr=help for details)"),
- cl::value_desc("attr1,+attr2, ..., -attrN"));
+ cl::value_desc("a1,+a2,-a3,..."));
cl::opt<TargetMachine::CodeGenFileType>
-FileType("filetype", cl::init(TargetMachine::AssemblyFile),
+FileType("filetype", cl::init(TargetMachine::CGFT_AssemblyFile),
cl::desc("Choose a file type (not all types are supported by all targets):"),
cl::values(
- clEnumValN(TargetMachine::AssemblyFile, "asm",
- " Emit an assembly ('.s') file"),
- clEnumValN(TargetMachine::ObjectFile, "obj",
- " Emit a native object ('.o') file [experimental]"),
- clEnumValN(TargetMachine::DynamicLibrary, "dynlib",
- " Emit a native dynamic library ('.so') file"),
+ clEnumValN(TargetMachine::CGFT_AssemblyFile, "asm",
+ "Emit an assembly ('.s') file"),
+ clEnumValN(TargetMachine::CGFT_ObjectFile, "obj",
+ "Emit a native object ('.o') file [experimental]"),
+ clEnumValN(TargetMachine::CGFT_Null, "null",
+ "Emit nothing, for performance testing"),
clEnumValEnd));
-// The LLCPassList is populated with passes that were registered using
-// PassInfo::LLC by the FilteredPassNameParser:
-cl::list<const PassInfo*, bool, FilteredPassNameParser<PassInfo::LLC> >
-LLCPassList(cl::desc("Passes Available"));
-
cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
cl::desc("Do not verify input module"));
+static cl::opt<bool>
+DisableRedZone("disable-red-zone",
+ cl::desc("Do not emit code that uses the red zone."),
+ cl::init(false));
+
+static cl::opt<bool>
+NoImplicitFloats("no-implicit-float",
+ cl::desc("Don't generate implicit floating point instructions (x86-only)"),
+ cl::init(false));
+
// GetFileNameRoot - Helper function to get the basename of a filename.
static inline std::string
GetFileNameRoot(const std::string &InputFilename) {
std::string outputFilename;
int Len = IFN.length();
if ((Len > 2) &&
- IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+ IFN[Len-3] == '.' &&
+ ((IFN[Len-2] == 'b' && IFN[Len-1] == 'c') ||
+ (IFN[Len-2] == 'l' && IFN[Len-1] == 'l'))) {
outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
} else {
outputFilename = IFN;
return outputFilename;
}
+static formatted_raw_ostream *GetOutputStream(const char *TargetName,
+ const char *ProgName) {
+ if (OutputFilename != "") {
+ if (OutputFilename == "-")
+ return &fouts();
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ std::string error;
+ raw_fd_ostream *FDOut =
+ new raw_fd_ostream(OutputFilename.c_str(), error,
+ raw_fd_ostream::F_Binary);
+ if (!error.empty()) {
+ errs() << error << '\n';
+ delete FDOut;
+ return 0;
+ }
+ formatted_raw_ostream *Out =
+ new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM);
+
+ return Out;
+ }
+
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ return &fouts();
+ }
+
+ OutputFilename = GetFileNameRoot(InputFilename);
+
+ bool Binary = false;
+ switch (FileType) {
+ default: assert(0 && "Unknown file type");
+ case TargetMachine::CGFT_AssemblyFile:
+ if (TargetName[0] == 'c') {
+ if (TargetName[1] == 0)
+ OutputFilename += ".cbe.c";
+ else if (TargetName[1] == 'p' && TargetName[2] == 'p')
+ OutputFilename += ".cpp";
+ else
+ OutputFilename += ".s";
+ } else
+ OutputFilename += ".s";
+ break;
+ case TargetMachine::CGFT_ObjectFile:
+ OutputFilename += ".o";
+ Binary = true;
+ break;
+ case TargetMachine::CGFT_Null:
+ OutputFilename += ".null";
+ Binary = true;
+ break;
+ }
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ std::string error;
+ unsigned OpenFlags = 0;
+ if (Binary) OpenFlags |= raw_fd_ostream::F_Binary;
+ raw_fd_ostream *FDOut = new raw_fd_ostream(OutputFilename.c_str(), error,
+ OpenFlags);
+ if (!error.empty()) {
+ errs() << error << '\n';
+ delete FDOut;
+ return 0;
+ }
+
+ formatted_raw_ostream *Out =
+ new formatted_raw_ostream(*FDOut, formatted_raw_ostream::DELETE_STREAM);
+
+ return Out;
+}
// main - Entry point for the llc compiler.
//
int main(int argc, char **argv) {
- try {
- cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
- sys::PrintStackTraceOnErrorSignal();
-
- // Load the module to be compiled...
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
- if (M.get() == 0) {
- std::cerr << argv[0] << ": bytecode didn't read correctly.\n";
- return 1;
- }
- Module &mod = *M.get();
-
- // Allocate target machine. First, check whether the user has
- // explicitly specified an architecture to compile for.
- TargetMachine* (*TargetMachineAllocator)(const Module&,
- IntrinsicLowering *) = 0;
- if (MArch == 0) {
- std::string Err;
- MArch = TargetMachineRegistry::getClosestStaticTargetForModule(mod, Err);
- if (MArch == 0) {
- std::cerr << argv[0] << ": error auto-selecting target for module '"
- << Err << "'. Please use the -march option to explicitly "
- << "pick a target.\n";
- return 1;
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ // Enable debug stream buffering.
+ EnableDebugBuffering = true;
+
+ LLVMContext &Context = getGlobalContext();
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+ // Initialize targets first, so that --version shows registered targets.
+ InitializeAllTargets();
+ InitializeAllAsmPrinters();
+ InitializeAllAsmParsers();
+
+ cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
+
+ // Load the module to be compiled...
+ SMDiagnostic Err;
+ std::auto_ptr<Module> M;
+
+ M.reset(ParseIRFile(InputFilename, Err, Context));
+ if (M.get() == 0) {
+ Err.Print(argv[0], errs());
+ return 1;
+ }
+ Module &mod = *M.get();
+
+ // If we are supposed to override the target triple, do so now.
+ if (!TargetTriple.empty())
+ mod.setTargetTriple(TargetTriple);
+
+ Triple TheTriple(mod.getTargetTriple());
+ if (TheTriple.getTriple().empty())
+ TheTriple.setTriple(sys::getHostTriple());
+
+ // Allocate target machine. First, check whether the user has explicitly
+ // specified an architecture to compile for. If so we have to look it up by
+ // name, because it might be a backend that has no mapping to a target triple.
+ const Target *TheTarget = 0;
+ if (!MArch.empty()) {
+ for (TargetRegistry::iterator it = TargetRegistry::begin(),
+ ie = TargetRegistry::end(); it != ie; ++it) {
+ if (MArch == it->getName()) {
+ TheTarget = &*it;
+ break;
}
}
- // Package up features to be passed to target/subtarget
- std::string FeaturesStr;
- if (MCPU.size() || MAttrs.size()) {
- SubtargetFeatures Features;
- Features.setCPU(MCPU);
- for (unsigned i = 0; i != MAttrs.size(); ++i)
- Features.AddFeature(MAttrs[i]);
- FeaturesStr = Features.getString();
+ if (!TheTarget) {
+ errs() << argv[0] << ": error: invalid target '" << MArch << "'.\n";
+ return 1;
}
- std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, 0, FeaturesStr));
- assert(target.get() && "Could not allocate target machine!");
- TargetMachine &Target = *target.get();
- const TargetData &TD = Target.getTargetData();
-
- // Build up all of the passes that we want to do to the module...
- PassManager Passes;
- Passes.add(new TargetData(TD));
-
- // Create a new pass for each one specified on the command line
- for (unsigned i = 0; i < LLCPassList.size(); ++i) {
- const PassInfo *aPass = LLCPassList[i];
-
- if (aPass->getNormalCtor()) {
- Pass *P = aPass->getNormalCtor()();
- Passes.add(P);
- } else {
- std::cerr << argv[0] << ": cannot create pass: "
- << aPass->getPassName() << "\n";
- }
+ // Adjust the triple to match (if known), otherwise stick with the
+ // module/host triple.
+ Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
+ if (Type != Triple::UnknownArch)
+ TheTriple.setArch(Type);
+ } else {
+ std::string Err;
+ TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
+ if (TheTarget == 0) {
+ errs() << argv[0] << ": error auto-selecting target for module '"
+ << Err << "'. Please use the -march option to explicitly "
+ << "pick a target.\n";
+ return 1;
}
+ }
+
+ // Package up features to be passed to target/subtarget
+ std::string FeaturesStr;
+ if (MCPU.size() || MAttrs.size()) {
+ SubtargetFeatures Features;
+ Features.setCPU(MCPU);
+ for (unsigned i = 0; i != MAttrs.size(); ++i)
+ Features.AddFeature(MAttrs[i]);
+ FeaturesStr = Features.getString();
+ }
+ std::auto_ptr<TargetMachine>
+ target(TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr));
+ assert(target.get() && "Could not allocate target machine!");
+ TargetMachine &Target = *target.get();
+
+ // Figure out where we are going to send the output...
+ formatted_raw_ostream *Out = GetOutputStream(TheTarget->getName(), argv[0]);
+ if (Out == 0) return 1;
+
+ CodeGenOpt::Level OLvl = CodeGenOpt::Default;
+ switch (OptLevel) {
+ default:
+ errs() << argv[0] << ": invalid optimization level.\n";
+ return 1;
+ case ' ': break;
+ case '0': OLvl = CodeGenOpt::None; break;
+ case '1': OLvl = CodeGenOpt::Less; break;
+ case '2': OLvl = CodeGenOpt::Default; break;
+ case '3': OLvl = CodeGenOpt::Aggressive; break;
+ }
+
+ // Request that addPassesToEmitFile run the Verifier after running
+ // passes which modify the IR.
#ifndef NDEBUG
- if(!NoVerify)
- Passes.add(createVerifierPass());
+ bool DisableVerify = false;
+#else
+ bool DisableVerify = true;
#endif
- // Figure out where we are going to send the output...
- std::ostream *Out = 0;
- if (OutputFilename != "") {
- if (OutputFilename != "-") {
- // Specified an output filename?
- if (!Force && std::ifstream(OutputFilename.c_str())) {
- // If force is not specified, make sure not to overwrite a file!
- std::cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists!\n"
- << "Use -f command line argument to force output\n";
- return 1;
- }
- Out = new std::ofstream(OutputFilename.c_str());
-
- // Make sure that the Out file gets unlinked from the disk if we get a
- // SIGINT
- sys::RemoveFileOnSignal(sys::Path(OutputFilename));
- } else {
- Out = &std::cout;
- }
- } else {
- if (InputFilename == "-") {
- OutputFilename = "-";
- Out = &std::cout;
- } else {
- OutputFilename = GetFileNameRoot(InputFilename);
-
- switch (FileType) {
- case TargetMachine::AssemblyFile:
- if (MArch->Name[0] != 'c' || MArch->Name[1] != 0) // not CBE
- OutputFilename += ".s";
- else
- OutputFilename += ".cbe.c";
- break;
- case TargetMachine::ObjectFile:
- OutputFilename += ".o";
- break;
- case TargetMachine::DynamicLibrary:
- OutputFilename += LTDL_SHLIB_EXT;
- break;
- }
-
- if (!Force && std::ifstream(OutputFilename.c_str())) {
- // If force is not specified, make sure not to overwrite a file!
- std::cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists!\n"
- << "Use -f command line argument to force output\n";
- return 1;
- }
-
- Out = new std::ofstream(OutputFilename.c_str());
- if (!Out->good()) {
- std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
- delete Out;
- return 1;
- }
-
- // Make sure that the Out file gets unlinked from the disk if we get a
- // SIGINT
- sys::RemoveFileOnSignal(sys::Path(OutputFilename));
- }
- }
+ // If this target requires addPassesToEmitWholeFile, do it now. This is
+ // used by strange things like the C backend.
+ if (Target.WantsWholeFile()) {
+ PassManager PM;
+
+ // Add the target data from the target machine, if it exists, or the module.
+ if (const TargetData *TD = Target.getTargetData())
+ PM.add(new TargetData(*TD));
+ else
+ PM.add(new TargetData(&mod));
+
+ if (!NoVerify)
+ PM.add(createVerifierPass());
// Ask the target to add backend passes as necessary.
- if (Target.addPassesToEmitFile(Passes, *Out, FileType)) {
- std::cerr << argv[0] << ": target '" << Target.getName()
- << "' does not support generation of this file type!\n";
- if (Out != &std::cout) delete Out;
+ if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, OLvl,
+ DisableVerify)) {
+ errs() << argv[0] << ": target does not support generation of this"
+ << " file type!\n";
+ if (Out != &fouts()) delete Out;
// And the Out file is empty and useless, so remove it now.
- std::remove(OutputFilename.c_str());
+ sys::Path(OutputFilename).eraseFromDisk();
return 1;
- } else {
- // Run our queue of passes all at once now, efficiently.
- Passes.run(*M.get());
}
+ PM.run(mod);
+ } else {
+ // Build up all of the passes that we want to do to the module.
+ FunctionPassManager Passes(M.get());
- // Delete the ostream if it's not a stdout stream
- if (Out != &std::cout) delete Out;
+ // Add the target data from the target machine, if it exists, or the module.
+ if (const TargetData *TD = Target.getTargetData())
+ Passes.add(new TargetData(*TD));
+ else
+ Passes.add(new TargetData(&mod));
- return 0;
- } catch (const std::string& msg) {
- std::cerr << argv[0] << ": " << msg << "\n";
- } catch (...) {
- std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+#ifndef NDEBUG
+ if (!NoVerify)
+ Passes.add(createVerifierPass());
+#endif
+
+ // Override default to generate verbose assembly.
+ Target.setAsmVerbosityDefault(true);
+
+ if (Target.addPassesToEmitFile(Passes, *Out, FileType, OLvl,
+ DisableVerify)) {
+ errs() << argv[0] << ": target does not support generation of this"
+ << " file type!\n";
+ if (Out != &fouts()) delete Out;
+ // And the Out file is empty and useless, so remove it now.
+ sys::Path(OutputFilename).eraseFromDisk();
+ return 1;
+ }
+
+ Passes.doInitialization();
+
+ // Run our queue of passes all at once now, efficiently.
+ // TODO: this could lazily stream functions out of the module.
+ for (Module::iterator I = mod.begin(), E = mod.end(); I != E; ++I)
+ if (!I->isDeclaration()) {
+ if (DisableRedZone)
+ I->addFnAttr(Attribute::NoRedZone);
+ if (NoImplicitFloats)
+ I->addFnAttr(Attribute::NoImplicitFloat);
+ Passes.run(*I);
+ }
+
+ Passes.doFinalization();
}
- return 1;
+
+ // Delete the ostream if it's not a stdout stream
+ if (Out != &fouts()) delete Out;
+
+ return 0;
}
projects / oota-llvm.git / blobdiff