-//===------------------------------------------------------------------------===
-// LLVM 'LLC' UTILITY
+//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
//
-// This is the llc compiler driver.
+// 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 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/Optimizations/Normalize.h"
-#include "llvm/CodeGen/InstrSelection.h"
-#include "llvm/CodeGen/InstrScheduling.h"
-#include "llvm/CodeGen/Sparc.h"
-#include "llvm/Support/CommandLine.h"
+#include "llvm/Target/SubtargetFeature.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Transforms/Scalar.h"
#include "llvm/Module.h"
-#include "llvm/Method.h"
+#include "llvm/PassManager.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/PluginLoader.h"
+#include "llvm/Support/FileUtilities.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/System/Signals.h"
+#include "llvm/Config/config.h"
+#include <fstream>
+#include <iostream>
+#include <memory>
+
+using namespace llvm;
+
+// General options for llc. Other pass-specific options are specified
+// within the corresponding llc passes, and target-specific options
+// 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("-"));
+
+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> 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, TargetNameParser>
+MArch("march", cl::desc("Architecture to generate code for:"));
+
+static cl::opt<std::string>
+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",
+ cl::CommaSeparated,
+ 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),
+ 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"),
+ clEnumValEnd));
+
+cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
+ cl::desc("Do not verify input module"));
-cl::String InputFilename ("", "Input filename", cl::NoFlags, "-");
-cl::String OutputFilename("o", "Output filename", cl::NoFlags, "");
-static void NormalizeMethod(Method* method) {
- NormalizePhiConstantArgs(method);
+// GetFileNameRoot - Helper function to get the basename of a filename.
+static inline std::string
+GetFileNameRoot(const std::string &InputFilename) {
+ std::string IFN = InputFilename;
+ std::string outputFilename;
+ int Len = IFN.length();
+ 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;
+ }
+ return outputFilename;
}
-static bool CompileModule(Module *M, TargetMachine &Target) {
- for (Module::const_iterator MI = M->begin(), ME = M->end(); MI != ME; ++MI) {
- Method *Meth = *MI;
-
- NormalizeMethod(Meth);
-
- if (SelectInstructionsForMethod(Meth, Target)) {
- cerr << "Instruction selection failed for method " << Meth->getName()
- << "\n\n";
- return true;
+// 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();
- if (ScheduleInstructionsWithSSA(Meth, Target)) {
- cerr << "Instruction scheduling before allocation failed for method "
- << Meth->getName() << "\n\n";
- return true;
+ // 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::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();
}
- }
-
- return false;
-}
+ std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, 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));
-//---------------------------------------------------------------------------
-// Function main()
-//
-// Entry point for the llc compiler.
-//---------------------------------------------------------------------------
+#ifndef NDEBUG
+ if(!NoVerify)
+ Passes.add(createVerifierPass());
+#endif
-int main(int argc, char** argv) {
- cl::ParseCommandLineOptions(argc, argv, " llvm system compiler\n");
- UltraSparc Target;
-
- Module *module = ParseBytecodeFile(InputFilename);
- if (module == 0) {
- cerr << "bytecode didn't read correctly.\n";
- return 1;
- }
+ // 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));
+ }
+ }
+
+ // Ask the target to add backend passes as necessary.
+ if (Target.addPassesToEmitFile(Passes, *Out, FileType, Fast)) {
+ std::cerr << argv[0] << ": target '" << Target.getName()
+ << "' 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;
+ } 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;
- if (CompileModule(module, Target)) {
- cerr << "Error compiling " << InputFilename << "!\n";
- delete module;
- return 1;
+ return 0;
+ } catch (const std::string& msg) {
+ std::cerr << argv[0] << ": " << msg << "\n";
+ } catch (...) {
+ std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
-
- // Clean up and exit
- delete module;
- return 0;
+ return 1;
}
projects / oota-llvm.git / blobdiff