1 files changed, 285 insertions, 0 deletions
diff --git a/contrib/llvm/tools/llvm-extract/llvm-extract.cpp b/contrib/llvm/tools/llvm-extract/llvm-extract.cpp
new file mode 100644
index 0000000..1da456d
--- /dev/null
+++ b/contrib/llvm/tools/llvm-extract/llvm-extract.cpp
@@ -0,0 +1,285 @@
+//===- 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/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 <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"));
+
+// 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);
+
+static cl::opt<bool> PreserveBitcodeUseListOrder(
+    "preserve-bc-uselistorder",
+    cl::desc("Preserve use-list order when writing LLVM bitcode."),
+    cl::init(true), cl::Hidden);
+
+static cl::opt<bool> PreserveAssemblyUseListOrder(
+    "preserve-ll-uselistorder",
+    cl::desc("Preserve use-list order when writing LLVM assembly."),
+    cl::init(false), 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");
+
+  // 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;
+  }
+
+  // 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;
+    }
+  }
+
+  auto Materialize = [&](GlobalValue &GV) {
+    if (std::error_code EC = GV.materialize()) {
+      errs() << argv[0] << ": error reading input: " << EC.message() << "\n";
+      exit(1);
+    }
+  };
+
+  // Materialize requisite global values.
+  if (!DeleteFn) {
+    for (size_t i = 0, e = GVs.size(); i != e; ++i)
+      Materialize(*GVs[i]);
+  } else {
+    // Deleting. Materialize every GV that's *not* in GVs.
+    SmallPtrSet<GlobalValue *, 8> GVSet(GVs.begin(), GVs.end());
+    for (auto &F : *M) {
+      if (!GVSet.count(&F))
+        Materialize(F);
+    }
+  }
+
+  {
+    std::vector<GlobalValue *> Gvs(GVs.begin(), GVs.end());
+    legacy::PassManager Extract;
+    Extract.add(createGVExtractionPass(Gvs, DeleteFn));
+    Extract.run(*M);
+
+    // Now that we have all the GVs we want, mark the module as fully
+    // materialized.
+    // FIXME: should the GVExtractionPass handle this?
+    M->materializeAll();
+  }
+
+  // In addition to deleting all other functions, we also want to spiff it
+  // up a little bit.  Do this now.
+  legacy::PassManager Passes;
+
+  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;
+  }
+
+  if (OutputAssembly)
+    Passes.add(
+        createPrintModulePass(Out.os(), "", PreserveAssemblyUseListOrder));
+  else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
+    Passes.add(createBitcodeWriterPass(Out.os(), PreserveBitcodeUseListOrder));
+
+  Passes.run(*M.get());
+
+  // Declare success.
+  Out.keep();
+
+  return 0;
+}