a8b6bed223
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
131 lines
4.0 KiB
C++
131 lines
4.0 KiB
C++
//===- llvm-link.cpp - Low-level LLVM linker ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This utility may be invoked in the following manner:
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// llvm-link a.bc b.bc c.bc -o x.bc
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Linker.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Bitcode/ReaderWriter.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/SystemUtils.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include <memory>
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using namespace llvm;
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static cl::list<std::string>
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InputFilenames(cl::Positional, cl::OneOrMore,
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cl::desc("<input bitcode files>"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"), cl::init("-"),
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cl::value_desc("filename"));
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static cl::opt<bool>
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Force("f", cl::desc("Enable binary output on terminals"));
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static cl::opt<bool>
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OutputAssembly("S",
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cl::desc("Write output as LLVM assembly"), cl::Hidden);
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static cl::opt<bool>
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Verbose("v", cl::desc("Print information about actions taken"));
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static cl::opt<bool>
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DumpAsm("d", cl::desc("Print assembly as linked"), cl::Hidden);
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// LoadFile - Read the specified bitcode file in and return it. This routine
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// searches the link path for the specified file to try to find it...
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//
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static inline Module *LoadFile(const char *argv0, const std::string &FN,
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LLVMContext& Context) {
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SMDiagnostic Err;
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if (Verbose) errs() << "Loading '" << FN << "'\n";
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Module* Result = 0;
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Result = ParseIRFile(FN, Err, Context);
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if (Result) return Result; // Load successful!
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Err.print(argv0, errs());
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return NULL;
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}
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int main(int argc, char **argv) {
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// Print a stack trace if we signal out.
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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LLVMContext &Context = getGlobalContext();
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");
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unsigned BaseArg = 0;
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std::string ErrorMessage;
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OwningPtr<Module> Composite(LoadFile(argv[0],
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InputFilenames[BaseArg], Context));
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if (Composite.get() == 0) {
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errs() << argv[0] << ": error loading file '"
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<< InputFilenames[BaseArg] << "'\n";
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return 1;
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}
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Linker L(Composite.get());
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for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
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OwningPtr<Module> M(LoadFile(argv[0], InputFilenames[i], Context));
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if (M.get() == 0) {
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errs() << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
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return 1;
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}
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if (Verbose) errs() << "Linking in '" << InputFilenames[i] << "'\n";
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if (L.linkInModule(M.get(), &ErrorMessage)) {
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errs() << argv[0] << ": link error in '" << InputFilenames[i]
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<< "': " << ErrorMessage << "\n";
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return 1;
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}
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}
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if (DumpAsm) errs() << "Here's the assembly:\n" << *Composite;
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std::string ErrorInfo;
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tool_output_file Out(OutputFilename.c_str(), ErrorInfo, sys::fs::F_Binary);
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if (!ErrorInfo.empty()) {
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errs() << ErrorInfo << '\n';
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return 1;
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}
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if (verifyModule(*Composite)) {
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errs() << argv[0] << ": linked module is broken!\n";
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return 1;
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}
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if (Verbose) errs() << "Writing bitcode...\n";
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if (OutputAssembly) {
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Out.os() << *Composite;
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} else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
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WriteBitcodeToFile(Composite.get(), Out.os());
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// Declare success.
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Out.keep();
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return 0;
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}
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