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https://github.com/c64scene-ar/llvm-6502.git
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f17f214145
The SuppressWarnings flag, unfortunately, isn't very useful for custom tools that want to use the LLVM module linker. So I'm changing it to a parameter of the Linker, and the flag itself moves to the llvm-link tool. For the time being as SuppressWarnings is pretty much the only "option" it seems reasonable to propagate it to Linker objects. If we end up with more options in the future, some sort of "struct collecting options" may be a better idea. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201819 91177308-0d34-0410-b5e6-96231b3b80d8
135 lines
4.1 KiB
C++
135 lines
4.1 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/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/IR/Verifier.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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static cl::opt<bool>
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SuppressWarnings("suppress-warnings", cl::desc("Suppress all linking warnings"),
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cl::init(false));
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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(), SuppressWarnings);
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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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