+//===- 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.
+//
//===----------------------------------------------------------------------===//
-// LLVM extract Utility
//
// This utility changes the input module to only contain a single function,
// which is primarily used for debugging transformations.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Pass.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/WriteBytecodePass.h"
+#include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/Bitcode/BitcodeWriterPass.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/IRPrintingPasses.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Regex.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Transforms/IPO.h"
-#include "Support/CommandLine.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"),
- cl::value_desc("function"));
+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"));
+
+// ExtractFuncs - The functions to extract from the module.
+static cl::list<std::string>
+ExtractFuncs("func", cl::desc("Specify function to extract"),
+ cl::ZeroOrMore, cl::value_desc("function"));
+
+// ExtractRegExpFuncs - The functions, matched via regular expression, to
+// extract from the module.
+static cl::list<std::string>
+ExtractRegExpFuncs("rfunc", cl::desc("Specify function(s) to extract using a "
+ "regular expression"),
+ cl::ZeroOrMore, cl::value_desc("rfunction"));
+
+// ExtractAlias - The alias to extract from the module.
+static cl::list<std::string>
+ExtractAliases("alias", cl::desc("Specify alias to extract"),
+ cl::ZeroOrMore, cl::value_desc("alias"));
+
+
+// ExtractRegExpAliases - The aliases, matched via regular expression, to
+// extract from the module.
+static cl::list<std::string>
+ExtractRegExpAliases("ralias", cl::desc("Specify alias(es) to extract using a "
+ "regular expression"),
+ cl::ZeroOrMore, cl::value_desc("ralias"));
+
+// ExtractGlobals - The globals to extract from the module.
+static cl::list<std::string>
+ExtractGlobals("glob", cl::desc("Specify global to extract"),
+ cl::ZeroOrMore, cl::value_desc("global"));
+
+// ExtractRegExpGlobals - The globals, matched via regular expression, to
+// extract from the module...
+static cl::list<std::string>
+ExtractRegExpGlobals("rglob", cl::desc("Specify global(s) to extract using a "
+ "regular expression"),
+ cl::ZeroOrMore, cl::value_desc("rglobal"));
+
+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);
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
- if (M.get() == 0) {
- std::cerr << argv[0] << ": bytecode didn't read correctly.\n";
+ LLVMContext &Context = getGlobalContext();
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ cl::ParseCommandLineOptions(argc, argv, "llvm extractor\n");
+
+ // Use lazy loading, since we only care about selected global values.
+ SMDiagnostic Err;
+ std::unique_ptr<Module> M = getLazyIRFileModule(InputFilename, Err, Context);
+
+ if (!M.get()) {
+ 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";
+ // Use SetVector to avoid duplicates.
+ SetVector<GlobalValue *> GVs;
+
+ // Figure out which aliases we should extract.
+ for (size_t i = 0, e = ExtractAliases.size(); i != e; ++i) {
+ GlobalAlias *GA = M->getNamedAlias(ExtractAliases[i]);
+ if (!GA) {
+ errs() << argv[0] << ": program doesn't contain alias named '"
+ << ExtractAliases[i] << "'!\n";
+ return 1;
+ }
+ GVs.insert(GA);
+ }
+
+ // Extract aliases via regular expression matching.
+ for (size_t i = 0, e = ExtractRegExpAliases.size(); i != e; ++i) {
+ std::string Error;
+ Regex RegEx(ExtractRegExpAliases[i]);
+ if (!RegEx.isValid(Error)) {
+ errs() << argv[0] << ": '" << ExtractRegExpAliases[i] << "' "
+ "invalid regex: " << Error;
+ }
+ bool match = false;
+ for (Module::alias_iterator GA = M->alias_begin(), E = M->alias_end();
+ GA != E; GA++) {
+ if (RegEx.match(GA->getName())) {
+ GVs.insert(&*GA);
+ match = true;
+ }
+ }
+ if (!match) {
+ errs() << argv[0] << ": program doesn't contain global named '"
+ << ExtractRegExpAliases[i] << "'!\n";
+ return 1;
+ }
+ }
+
+ // Figure out which globals we should extract.
+ for (size_t i = 0, e = ExtractGlobals.size(); i != e; ++i) {
+ GlobalValue *GV = M->getNamedGlobal(ExtractGlobals[i]);
+ if (!GV) {
+ errs() << argv[0] << ": program doesn't contain global named '"
+ << ExtractGlobals[i] << "'!\n";
+ return 1;
+ }
+ GVs.insert(GV);
+ }
+
+ // Extract globals via regular expression matching.
+ for (size_t i = 0, e = ExtractRegExpGlobals.size(); i != e; ++i) {
+ std::string Error;
+ Regex RegEx(ExtractRegExpGlobals[i]);
+ if (!RegEx.isValid(Error)) {
+ errs() << argv[0] << ": '" << ExtractRegExpGlobals[i] << "' "
+ "invalid regex: " << Error;
+ }
+ bool match = false;
+ for (auto &GV : M->globals()) {
+ if (RegEx.match(GV.getName())) {
+ GVs.insert(&GV);
+ match = true;
+ }
+ }
+ if (!match) {
+ errs() << argv[0] << ": program doesn't contain global named '"
+ << ExtractRegExpGlobals[i] << "'!\n";
+ return 1;
+ }
+ }
+
+ // Figure out which functions we should extract.
+ for (size_t i = 0, e = ExtractFuncs.size(); i != e; ++i) {
+ GlobalValue *GV = M->getFunction(ExtractFuncs[i]);
+ if (!GV) {
+ errs() << argv[0] << ": program doesn't contain function named '"
+ << ExtractFuncs[i] << "'!\n";
+ return 1;
+ }
+ GVs.insert(GV);
+ }
+ // Extract functions via regular expression matching.
+ for (size_t i = 0, e = ExtractRegExpFuncs.size(); i != e; ++i) {
+ std::string Error;
+ StringRef RegExStr = ExtractRegExpFuncs[i];
+ Regex RegEx(RegExStr);
+ if (!RegEx.isValid(Error)) {
+ errs() << argv[0] << ": '" << ExtractRegExpFuncs[i] << "' "
+ "invalid regex: " << Error;
+ }
+ bool match = false;
+ for (Module::iterator F = M->begin(), E = M->end(); F != E;
+ F++) {
+ if (RegEx.match(F->getName())) {
+ GVs.insert(&*F);
+ match = true;
+ }
+ }
+ if (!match) {
+ errs() << argv[0] << ": program doesn't contain global named '"
+ << ExtractRegExpFuncs[i] << "'!\n";
+ return 1;
+ }
+ }
+
+ // Materialize requisite global values.
+ if (!DeleteFn)
+ for (size_t i = 0, e = GVs.size(); i != e; ++i) {
+ GlobalValue *GV = GVs[i];
+ if (std::error_code EC = GV->materialize()) {
+ errs() << argv[0] << ": error reading input: " << EC.message() << "\n";
+ return 1;
+ }
+ }
+ else {
+ // Deleting. Materialize every GV that's *not* in GVs.
+ SmallPtrSet<GlobalValue *, 8> GVSet(GVs.begin(), GVs.end());
+ for (auto &G : M->globals()) {
+ if (!GVSet.count(&G)) {
+ if (std::error_code EC = G.materialize()) {
+ errs() << argv[0] << ": error reading input: " << EC.message()
+ << "\n";
+ return 1;
+ }
+ }
+ }
+ for (auto &F : *M) {
+ if (!GVSet.count(&F)) {
+ if (std::error_code EC = F.materialize()) {
+ errs() << argv[0] << ": error reading input: " << EC.message()
+ << "\n";
+ return 1;
+ }
+ }
+ }
+ }
+
+ // In addition to deleting all other functions, we also want to spiff it
+ // up a little bit. Do this now.
+ legacy::PassManager Passes;
+
+ std::vector<GlobalValue*> Gvs(GVs.begin(), GVs.end());
+
+ Passes.add(createGVExtractionPass(Gvs, DeleteFn));
+ if (!DeleteFn)
+ Passes.add(createGlobalDCEPass()); // Delete unreachable globals
+ Passes.add(createStripDeadDebugInfoPass()); // Remove dead debug info
+ Passes.add(createStripDeadPrototypesPass()); // Remove dead func decls
+
+ std::error_code EC;
+ tool_output_file Out(OutputFilename, EC, sys::fs::F_None);
+ if (EC) {
+ errs() << EC.message() << '\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.
- //
- PassManager Passes;
- 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...
+ if (OutputAssembly)
+ Passes.add(createPrintModulePass(Out.os()));
+ else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
+ Passes.add(createBitcodeWriterPass(Out.os()));
Passes.run(*M.get());
+
+ // Declare success.
+ Out.keep();
+
return 0;
}
projects / oota-llvm.git / blobdiff