mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
ec080467f5
working. To support this, add an is_displayed() function to raw_ostream, and generalize Process::StandardOutIsDisplayed and friends in order to support it. Also, call RemoveFileOnSignal before creating a file instead of after, so that the file isn't left behind if the program is interrupted between when the file is created and RemoveFileOnSignal is called. While here, add a -S to llvm-extract and port it to IRReader so that it supports assembly input. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81568 91177308-0d34-0410-b5e6-96231b3b80d8
134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
//===- llvm-extract.cpp - LLVM function extraction utility ----------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// 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,
|
|
// which is primarily used for debugging transformations.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/LLVMContext.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/PassManager.h"
|
|
#include "llvm/Assembly/PrintModulePass.h"
|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
|
#include "llvm/Transforms/IPO.h"
|
|
#include "llvm/Target/TargetData.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 bitcode file>"),
|
|
cl::init("-"), cl::value_desc("filename"));
|
|
|
|
static cl::opt<std::string>
|
|
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) {
|
|
// 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));
|
|
|
|
if (M.get() == 0) {
|
|
Err.Print(argv[0], errs());
|
|
return 1;
|
|
}
|
|
|
|
// Figure out which function we should extract
|
|
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 deleting all other functions, we also want to spiff it
|
|
// up a little bit. Do this now.
|
|
PassManager Passes;
|
|
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;
|
|
}
|