-//===-- llc.cpp - Implement the LLVM Compiler -----------------------------===//
+//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
+//
+// 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 is the llc compiler driver.
+// This is the llc code generator.
//
//===----------------------------------------------------------------------===//
#include "Support/Signals.h"
#include <memory>
#include <fstream>
-#include <cstdio>
-//------------------------------------------------------------------------------
-// Option declarations for LLC.
-//------------------------------------------------------------------------------
+using namespace llvm;
// General options for llc. Other pass-specific options are specified
// within the corresponding llc passes, and target-specific options
static cl::opt<bool> Force("f", cl::desc("Overwrite output files"));
-enum ArchName { noarch, x86, Sparc };
+enum ArchName { noarch, X86, Sparc, PowerPC, CBackend };
static cl::opt<ArchName>
Arch("march", cl::desc("Architecture to generate assembly for:"), cl::Prefix,
- cl::values(clEnumVal(x86, " IA-32 (Pentium and above)"),
- clEnumValN(Sparc, "sparc", " SPARC V9"),
+ cl::values(clEnumValN(X86, "x86", " IA-32 (Pentium and above)"),
+ clEnumValN(Sparc, "sparc", " SPARC V9"),
+ clEnumValN(PowerPC, "powerpc", " PowerPC"),
+ clEnumValN(CBackend, "c", " C backend"),
0),
cl::init(noarch));
std::string IFN = InputFilename;
std::string outputFilename;
int Len = IFN.length();
- if (IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
+ if ((Len > 2) &&
+ IFN[Len-3] == '.' && IFN[Len-2] == 'b' && IFN[Len-1] == 'c') {
outputFilename = std::string(IFN.begin(), IFN.end()-3); // s/.bc/.s/
} else {
outputFilename = IFN;
}
-//===---------------------------------------------------------------------===//
-// Function main()
-//
-// Entry point for the llc compiler.
-//===---------------------------------------------------------------------===//
-
-int
-main(int argc, char **argv)
-{
+// main - Entry point for the llc compiler.
+//
+int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
// 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;
- }
+ 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.
- unsigned Config = (mod.isLittleEndian() ? TM::LittleEndian : TM::BigEndian) |
- (mod.has32BitPointers() ? TM::PtrSize32 : TM::PtrSize64);
- TargetMachine* (*TargetMachineAllocator)(unsigned) = 0;
+ TargetMachine* (*TargetMachineAllocator)(const Module&,
+ IntrinsicLowering *) = 0;
switch (Arch) {
- case x86:
+ case CBackend:
+ TargetMachineAllocator = allocateCTargetMachine;
+ break;
+ case X86:
TargetMachineAllocator = allocateX86TargetMachine;
break;
case Sparc:
TargetMachineAllocator = allocateSparcTargetMachine;
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.isLittleEndian() && mod.has32BitPointers()) {
+ if (mod.getEndianness() == Module::LittleEndian &&
+ mod.getPointerSize() == Module::Pointer32) {
TargetMachineAllocator = allocateX86TargetMachine;
- } else if (mod.isBigEndian() && mod.has64BitPointers()) {
+ } else if (mod.getEndianness() == Module::BigEndian &&
+ mod.getPointerSize() == Module::Pointer32) {
+ TargetMachineAllocator = allocatePowerPCTargetMachine;
+ } else if (mod.getEndianness() == Module::BigEndian &&
+ mod.getPointerSize() == Module::Pointer64) {
TargetMachineAllocator = allocateSparcTargetMachine;
} else {
- assert(0 && "You must specify -march; I could not guess the default");
+ // 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 = allocateSparcTargetMachine;
+#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";
+ return 1;
+#endif
}
break;
}
- std::auto_ptr<TargetMachine> target((*TargetMachineAllocator)(Config));
+ std::auto_ptr<TargetMachine> target(TargetMachineAllocator(mod, 0));
assert(target.get() && "Could not allocate target machine!");
TargetMachine &Target = *target.get();
const TargetData &TD = Target.getTargetData();
// Figure out where we are going to send the output...
std::ostream *Out = 0;
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());
+ 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 unlink'd from the disk if we get a
- // SIGINT
- RemoveFileOnSignal(OutputFilename);
+ // Make sure that the Out file gets unlinked from the disk if we get a
+ // SIGINT
+ RemoveFileOnSignal(OutputFilename);
+ } else {
+ Out = &std::cout;
+ }
} else {
if (InputFilename == "-") {
OutputFilename = "-";
Out = &std::cout;
} else {
OutputFilename = GetFileNameRoot(InputFilename);
- OutputFilename += ".s";
+
+ if (Arch != CBackend)
+ OutputFilename += ".s";
+ else
+ OutputFilename += ".cbe.c";
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
return 1;
}
- // Make sure that the Out file gets unlink'd from the disk if we get a
+ // Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT
RemoveFileOnSignal(OutputFilename);
}
projects / oota-llvm.git / blobdiff