-//===- extract.cpp - LLVM function extraction utility ---------------------===//
-//
+//===- llvm-extract.cpp - LLVM function extraction utility ----------------===//
+//
// 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 file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
//===----------------------------------------------------------------------===//
//
// This utility changes the input module to only contain a single function,
//
//===----------------------------------------------------------------------===//
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/WriteBytecodePass.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Transforms/IPO.h"
#include "llvm/Target/TargetData.h"
-#include "Support/CommandLine.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/IRReader.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/System/Signals.h"
#include <memory>
+using namespace llvm;
// InputFilename - The filename to read from.
static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input bytecode file>"),
+InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
cl::init("-"), cl::value_desc("filename"));
-
-// ExtractFunc - The function to extract from the module... defaults to main.
static cl::opt<std::string>
-ExtractFunc("func", cl::desc("Specify function to extract"), cl::init("main"),
+OutputFilename("o", cl::desc("Specify output filename"),
+ cl::value_desc("filename"), cl::init("-"));
+
+static cl::opt<bool>
+Force("f", cl::desc("Enable binary output on terminals"));
+
+static cl::opt<bool>
+DeleteFn("delete", cl::desc("Delete specified Globals from Module"));
+
+static cl::opt<bool>
+Relink("relink",
+ cl::desc("Turn external linkage for callees of function to delete"));
+
+// ExtractFunc - The function to extract from the module...
+static cl::opt<std::string>
+ExtractFunc("func", cl::desc("Specify function to extract"), cl::init(""),
cl::value_desc("function"));
+// ExtractGlobal - The global to extract from the module...
+static cl::opt<std::string>
+ExtractGlobal("glob", cl::desc("Specify global to extract"), cl::init(""),
+ cl::value_desc("global"));
+
+static cl::opt<bool>
+OutputAssembly("S",
+ cl::desc("Write output as LLVM assembly"), cl::Hidden);
+
int main(int argc, char **argv) {
- cl::ParseCommandLineOptions(argc, argv, " llvm extractor\n");
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+
+ LLVMContext &Context = getGlobalContext();
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm extractor\n");
+
+ SMDiagnostic Err;
+ std::auto_ptr<Module> M;
+ M.reset(ParseIRFile(InputFilename, Err, Context));
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
if (M.get() == 0) {
- std::cerr << argv[0] << ": bytecode didn't read correctly.\n";
+ Err.Print(argv[0], errs());
return 1;
}
// Figure out which function we should extract
- Function *F = M.get()->getNamedFunction(ExtractFunc);
- if (F == 0) {
- std::cerr << argv[0] << ": program doesn't contain function named '"
- << ExtractFunc << "'!\n";
+ GlobalVariable *G = !ExtractGlobal.empty() ?
+ M.get()->getNamedGlobal(ExtractGlobal) : 0;
+
+ // Figure out which function we should extract
+ if (ExtractFunc.empty() && ExtractGlobal.empty()) ExtractFunc = "main";
+ Function *F = M.get()->getFunction(ExtractFunc);
+
+ if (F == 0 && G == 0) {
+ errs() << argv[0] << ": program doesn't contain function named '"
+ << ExtractFunc << "' or a global named '" << ExtractGlobal << "'!\n";
return 1;
}
- // In addition to just parsing the input from GCC, we also want to spiff it up
- // a little bit. Do this now.
- //
+ // In addition to deleting all other functions, we also want to spiff it
+ // up a little bit. Do this now.
PassManager Passes;
- Passes.add(new TargetData("extract", M.get())); // Use correct TargetData
- Passes.add(createFunctionExtractionPass(F)); // Extract the function
- Passes.add(createGlobalDCEPass()); // Delete unreachable globals
- Passes.add(createFunctionResolvingPass()); // Delete prototypes
- Passes.add(createDeadTypeEliminationPass()); // Remove dead types...
- Passes.add(new WriteBytecodePass(&std::cout)); // Write bytecode to file...
+ Passes.add(new TargetData(M.get())); // Use correct TargetData
+ // Either isolate the function or delete it from the Module
+ std::vector<GlobalValue*> GVs;
+ if (F) GVs.push_back(F);
+ if (G) GVs.push_back(G);
+
+ Passes.add(createGVExtractionPass(GVs, DeleteFn, Relink));
+ if (!DeleteFn)
+ Passes.add(createGlobalDCEPass()); // Delete unreachable globals
+ Passes.add(createDeadTypeEliminationPass()); // Remove dead types...
+ Passes.add(createStripDeadPrototypesPass()); // Remove dead func decls
+
+ // Make sure that the Output file gets unlinked from the disk if we get a
+ // SIGINT
+ sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ std::string ErrorInfo;
+ raw_fd_ostream Out(OutputFilename.c_str(), ErrorInfo,
+ raw_fd_ostream::F_Binary);
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ return 1;
+ }
+
+ if (OutputAssembly)
+ Passes.add(createPrintModulePass(&Out));
+ else if (Force || !CheckBitcodeOutputToConsole(Out, true))
+ Passes.add(createBitcodeWriterPass(Out));
Passes.run(*M.get());
+
return 0;
}
projects / oota-llvm.git / blobdiff