//
// 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/Bitcode/ReaderWriter.h"
+#include "llvm/CodeGen/FileWriters.h"
+#include "llvm/CodeGen/LinkAllCodegenComponents.h"
#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetMachineRegistry.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Module.h"
+#include "llvm/ModuleProvider.h"
#include "llvm/PassManager.h"
#include "llvm/Pass.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PluginLoader.h"
-#include "llvm/Support/PassNameParser.h"
+#include "llvm/Support/FileUtilities.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/System/Signals.h"
#include "llvm/Config/config.h"
+#include "llvm/LinkAllVMCore.h"
#include <fstream>
#include <iostream>
#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<const TargetMachineRegistry::Entry*, false, TargetNameParser>
+static cl::opt<bool> Fast("fast",
+ cl::desc("Generate code quickly, potentially sacrificing code quality"));
+
+static cl::opt<std::string>
+TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
+static cl::opt<const TargetMachineRegistry::entry*, false,
+ TargetMachineRegistry::Parser>
MArch("march", cl::desc("Architecture to generate code for:"));
static cl::opt<std::string>
MCPU("mcpu",
- cl::desc("Target a specific cpu type"),
+ 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",
cl::CommaSeparated,
- cl::desc("Target specific attributes:"),
- cl::value_desc("attributes"));
+ cl::desc("Target specific attributes (-mattr=help for details)"),
+ cl::value_desc("a1,+a2,-a3,..."));
cl::opt<TargetMachine::CodeGenFileType>
FileType("filetype", cl::init(TargetMachine::AssemblyFile),
clEnumValN(TargetMachine::AssemblyFile, "asm",
" Emit an assembly ('.s') file"),
clEnumValN(TargetMachine::ObjectFile, "obj",
- " Emit a native object ('.o') file"),
+ " Emit a native object ('.o') file [experimental]"),
clEnumValN(TargetMachine::DynamicLibrary, "dynlib",
- " Emit a native dynamic library ('.so') file"),
+ " Emit a native dynamic library ('.so') file"
+ " [experimental]"),
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"));
return outputFilename;
}
+static std::ostream *GetOutputStream(const char *ProgName) {
+ if (OutputFilename != "") {
+ if (OutputFilename == "-")
+ return &std::cout;
+
+ // 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 << ProgName << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 0;
+ }
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ return new std::ofstream(OutputFilename.c_str());
+ }
+
+ if (InputFilename == "-") {
+ OutputFilename = "-";
+ return &std::cout;
+ }
+
+ 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 << ProgName << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
+ return 0;
+ }
+
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ std::ostream *Out = new std::ofstream(OutputFilename.c_str());
+ if (!Out->good()) {
+ std::cerr << ProgName << ": error opening " << OutputFilename << "!\n";
+ delete Out;
+ return 0;
+ }
+
+ 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;
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
+ sys::PrintStackTraceOnErrorSignal();
+
+ // Load the module to be compiled...
+ std::string ErrorMessage;
+ std::auto_ptr<Module> M;
+
+ std::auto_ptr<MemoryBuffer> Buffer(
+ MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage));
+ if (Buffer.get())
+ M.reset(ParseBitcodeFile(Buffer.get(), &ErrorMessage));
+ if (M.get() == 0) {
+ std::cerr << argv[0] << ": bitcode didn't read correctly.\n";
+ std::cerr << "Reason: " << ErrorMessage << "\n";
+ return 1;
+ }
+ Module &mod = *M.get();
+
+ // If we are supposed to override the target triple, do so now.
+ if (!TargetTriple.empty())
+ mod.setTargetTriple(TargetTriple);
+
+ // Allocate target machine. First, check whether the user has
+ // explicitly specified an architecture to compile for.
+ if (MArch == 0) {
+ std::string Err;
+ MArch = TargetMachineRegistry::getClosestStaticTargetForModule(mod, Err);
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;
- }
- }
-
- // 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::cerr << argv[0] << ": error auto-selecting target for module '"
+ << Err << "'. Please use the -march option to explicitly "
+ << "pick a target.\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";
- }
+ // 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(MArch->CtorFn(mod, FeaturesStr));
+ assert(target.get() && "Could not allocate target machine!");
+ TargetMachine &Target = *target.get();
+
+ // Figure out where we are going to send the output...
+ std::ostream *Out = GetOutputStream(argv[0]);
+ if (Out == 0) return 1;
+
+ // If this target requires addPassesToEmitWholeFile, do it now. This is
+ // used by strange things like the C backend.
+ if (Target.WantsWholeFile()) {
+ PassManager PM;
+ PM.add(new TargetData(*Target.getTargetData()));
+ if (!NoVerify)
+ PM.add(createVerifierPass());
+
+ // Ask the target to add backend passes as necessary.
+ if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, Fast)) {
+ std::cerr << argv[0] << ": target does not support generation of this"
+ << " file type!\n";
+ if (Out != &std::cout) delete Out;
+ // And the Out file is empty and useless, so remove it now.
+ sys::Path(OutputFilename).eraseFromDisk();
+ return 1;
}
-
+ PM.run(mod);
+ } else {
+ // Build up all of the passes that we want to do to the module.
+ FunctionPassManager Passes(new ExistingModuleProvider(M.get()));
+ Passes.add(new TargetData(*Target.getTargetData()));
+
#ifndef NDEBUG
- if(!NoVerify)
+ if (!NoVerify)
Passes.add(createVerifierPass());
#endif
+
+ // Ask the target to add backend passes as necessary.
+ MachineCodeEmitter *MCE = 0;
- // 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));
- }
+ switch (Target.addPassesToEmitFile(Passes, *Out, FileType, Fast)) {
+ default:
+ assert(0 && "Invalid file model!");
+ return 1;
+ case FileModel::Error:
+ std::cerr << argv[0] << ": target does not support generation of this"
+ << " file type!\n";
+ if (Out != &std::cout) delete Out;
+ // And the Out file is empty and useless, so remove it now.
+ sys::Path(OutputFilename).eraseFromDisk();
+ return 1;
+ case FileModel::AsmFile:
+ break;
+ case FileModel::MachOFile:
+ MCE = AddMachOWriter(Passes, *Out, Target);
+ break;
+ case FileModel::ElfFile:
+ MCE = AddELFWriter(Passes, *Out, Target);
+ break;
}
- // 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 (Target.addPassesToEmitFileFinish(Passes, MCE, Fast)) {
+ std::cerr << argv[0] << ": target does not support generation of this"
+ << " file type!\n";
if (Out != &std::cout) 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());
}
-
- // Delete the ostream if it's not a stdout stream
- if (Out != &std::cout) delete Out;
-
- return 0;
- } catch (const std::string& msg) {
- std::cerr << argv[0] << ": " << msg << "\n";
- } catch (...) {
- std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+
+ 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())
+ Passes.run(*I);
+
+ Passes.doFinalization();
}
- return 1;
+
+ // Delete the ostream if it's not a stdout stream
+ if (Out != &std::cout) delete Out;
+
+ return 0;
}
projects / oota-llvm.git / blobdiff