-//===- 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/Module.h"
#include "llvm/PassManager.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/WriteBytecodePass.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/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/System/Signals.h"
+#include <iostream>
#include <memory>
#include <fstream>
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"));
-
+
static cl::opt<std::string>
-OutputFilename("o", cl::desc("Specify output filename"),
+OutputFilename("o", cl::desc("Specify output filename"),
cl::value_desc("filename"), cl::init("-"));
static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
static cl::opt<bool>
-DeleteFn("delete", cl::desc("Delete specified function from Module"));
+DeleteFn("delete", cl::desc("Delete specified Globals from Module"));
-// ExtractFunc - The function to extract from the module... defaults to main.
+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("main"),
+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"));
+
int main(int argc, char **argv) {
- cl::ParseCommandLineOptions(argc, argv, " llvm extractor\n");
- PrintStackTraceOnErrorSignal();
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm extractor\n");
+ sys::PrintStackTraceOnErrorSignal();
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+ std::auto_ptr<Module> M;
+
+ MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename);
+ if (Buffer == 0) {
+ cerr << argv[0] << ": Error reading file '" + InputFilename + "'\n";
+ return 1;
+ } else {
+ M.reset(ParseBitcodeFile(Buffer));
+ }
+ delete Buffer;
+
if (M.get() == 0) {
- std::cerr << argv[0] << ": bytecode didn't read correctly.\n";
+ cerr << argv[0] << ": bitcode didn't read correctly.\n";
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.size() ?
+ M.get()->getNamedGlobal(ExtractGlobal) : 0;
+
+ // Figure out which function we should extract
+ if (!ExtractFunc.size() && !ExtractGlobal.size()) ExtractFunc = "main";
+ Function *F = M.get()->getFunction(ExtractFunc);
+
+ if (F == 0 && G == 0) {
+ cerr << argv[0] << ": program doesn't contain function named '"
+ << ExtractFunc << "' or a global named '" << ExtractGlobal << "'!\n";
return 1;
}
- // In addition to deleting all other functions, 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(new TargetData(M.get())); // Use correct TargetData
// Either isolate the function or delete it from the Module
- Passes.add(createFunctionExtractionPass(F, DeleteFn));
- Passes.add(createGlobalDCEPass()); // Delete unreachable globals
- Passes.add(createFunctionResolvingPass()); // Delete prototypes
- Passes.add(createDeadTypeEliminationPass()); // Remove dead types...
+ 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
std::ostream *Out = 0;
if (OutputFilename != "-") { // Not stdout?
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";
+ 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());
+ std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
+ std::ios::binary;
+ Out = new std::ofstream(OutputFilename.c_str(), io_mode);
} else { // Specified stdout
- Out = &std::cout;
+ // FIXME: cout is not binary!
+ Out = &std::cout;
}
- Passes.add(new WriteBytecodePass(Out)); // Write bytecode to file...
+ Passes.add(CreateBitcodeWriterPass(*Out));
Passes.run(*M.get());
if (Out != &std::cout)
projects / oota-llvm.git / blobdiff