//
//===----------------------------------------------------------------------===//
//
-// This is the llc code generator.
+// 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.
//
//===----------------------------------------------------------------------===//
#include "llvm/Bytecode/Reader.h"
-#include "llvm/Target/TargetMachineImpls.h"
#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineRegistry.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Pass.h"
#include "Support/CommandLine.h"
-#include "Support/Signals.h"
-#include <memory>
+#include "Support/PluginLoader.h"
+#include "llvm/System/Signals.h"
#include <fstream>
+#include <iostream>
+#include <memory>
using namespace llvm;
static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
-enum ArchName { noarch, X86, SparcV9, PowerPC, CBackend };
-
-static cl::opt<ArchName>
-Arch("march", cl::desc("Architecture to generate assembly for:"), cl::Prefix,
- cl::values(clEnumValN(X86, "x86", " IA-32 (Pentium and above)"),
- clEnumValN(SparcV9, "sparcv9", " SPARC V9"),
- clEnumValN(PowerPC, "powerpc", " PowerPC (experimental)"),
- clEnumValN(CBackend, "c", " C backend"),
- 0),
- cl::init(noarch));
-
+static cl::opt<const TargetMachineRegistry::Entry*, false, TargetNameParser>
+MArch("march", cl::desc("Architecture to generate assembly for:"));
+
// GetFileNameRoot - Helper function to get the basename of a filename...
static inline std::string
-GetFileNameRoot(const std::string &InputFilename)
-{
+GetFileNameRoot(const std::string &InputFilename) {
std::string IFN = InputFilename;
std::string outputFilename;
int Len = IFN.length();
//
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
- PrintStackTraceOnErrorSignal();
+ sys::PrintStackTraceOnErrorSignal();
// Load the module to be compiled...
std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
// explicitly specified an architecture to compile for.
TargetMachine* (*TargetMachineAllocator)(const Module&,
IntrinsicLowering *) = 0;
- switch (Arch) {
- case CBackend:
- TargetMachineAllocator = allocateCTargetMachine;
- break;
- case X86:
- TargetMachineAllocator = allocateX86TargetMachine;
- break;
- case SparcV9:
- TargetMachineAllocator = allocateSparcV9TargetMachine;
- break;
- case PowerPC:
- TargetMachineAllocator = allocatePowerPCTargetMachine;
- break;
- default:
- // Decide what the default target machine should be, by looking at
- // the module. This heuristic (ILP32, LE -> IA32; LP64, BE ->
- // SPARCV9) is kind of gross, but it will work until we have more
- // sophisticated target information to work from.
- if (mod.getEndianness() == Module::LittleEndian &&
- mod.getPointerSize() == Module::Pointer32) {
- TargetMachineAllocator = allocateX86TargetMachine;
- } else if (mod.getEndianness() == Module::BigEndian &&
- mod.getPointerSize() == Module::Pointer32) {
- TargetMachineAllocator = allocatePowerPCTargetMachine;
- } else if (mod.getEndianness() == Module::BigEndian &&
- mod.getPointerSize() == Module::Pointer64) {
- TargetMachineAllocator = allocateSparcV9TargetMachine;
- } else {
- // If the module is target independent, favor a target which matches the
- // current build system.
-#if defined(i386) || defined(__i386__) || defined(__x86__)
- TargetMachineAllocator = allocateX86TargetMachine;
-#elif defined(sparc) || defined(__sparc__) || defined(__sparcv9)
- TargetMachineAllocator = allocateSparcV9TargetMachine;
-#elif defined(__POWERPC__) || defined(__ppc__) || defined(__APPLE__)
- TargetMachineAllocator = allocatePowerPCTargetMachine;
-#else
- std::cerr << argv[0] << ": module does not specify a target to use. "
- << "You must use the -march option. If no native target is "
- << "available, use -march=c to emit C code.\n";
+ 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;
-#endif
- }
- break;
+ }
}
- std::auto_ptr<TargetMachine> target(TargetMachineAllocator(mod, 0));
+
+ std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, 0));
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("llc", TD.isLittleEndian(), TD.getPointerSize(),
TD.getPointerAlignment(), TD.getDoubleAlignment()));
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;
+ // 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
- RemoveFileOnSignal(OutputFilename);
+ sys::RemoveFileOnSignal(OutputFilename);
} else {
Out = &std::cout;
}
} else {
OutputFilename = GetFileNameRoot(InputFilename);
- if (Arch != CBackend)
+ if (MArch->Name[0] != 'c' || MArch->Name[1] != 0) // not CBE
OutputFilename += ".s";
else
OutputFilename += ".cbe.c";
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
- RemoveFileOnSignal(OutputFilename);
+ sys::RemoveFileOnSignal(OutputFilename);
}
}
projects / oota-llvm.git / blobdiff