X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=tools%2Fllvm-extract%2Fllvm-extract.cpp;h=8cbcdc50bce5d940bba49864176e920df3310ab9;hp=67f686e6733ffdaf51fc2b657e4d173f5703c935;hb=417c5c172ce0d56105112481b1bcf0bc2fc011c2;hpb=21c62da287237d39d0d95004881ea4baae3be6da

diff --git a/tools/llvm-extract/llvm-extract.cpp b/tools/llvm-extract/llvm-extract.cpp
index 67f686e6733..8cbcdc50bce 100644
--- a/tools/llvm-extract/llvm-extract.cpp
+++ b/tools/llvm-extract/llvm-extract.cpp
@@ -12,18 +12,26 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Bitcode/ReaderWriter.h"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/Target/TargetData.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/MemoryBuffer.h"
-#include "llvm/System/Signals.h"
-#include <iostream>
+#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>
-#include <fstream>
 using namespace llvm;
 
 // InputFilename - The filename to read from.
@@ -36,82 +44,235 @@ OutputFilename("o", cl::desc("Specify output filename"),
                cl::value_desc("filename"), cl::init("-"));
 
 static cl::opt<bool>
-Force("f", cl::desc("Overwrite output files"));
+Force("f", cl::desc("Enable binary output on terminals"));
 
 static cl::opt<bool>
-DeleteFn("delete", cl::desc("Delete specified function from Module"));
+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"));
+// 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"));
 
-// 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"));
+// 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) {
-  llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
-  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");
+
+  // Use lazy loading, since we only care about selected global values.
+  SMDiagnostic Err;
+  std::unique_ptr<Module> M = getLazyIRFileModule(InputFilename, Err, Context);
 
-  std::auto_ptr<Module> M;
-  
-  MemoryBuffer *Buffer = MemoryBuffer::getFileOrSTDIN(InputFilename);
-  if (Buffer == 0) {
-    cerr << argv[0] << ": Error reading file '" + InputFilename + "'\n";
+  if (!M.get()) {
+    Err.print(argv[0], errs());
     return 1;
-  } else {
-    M.reset(ParseBitcodeFile(Buffer));
   }
-  delete Buffer;
-  
-  if (M.get() == 0) {
-    cerr << argv[0] << ": bitcode didn't read correctly.\n";
-    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);
   }
 
-  // Figure out which function we should extract
-  Function *F = M.get()->getFunction(ExtractFunc);
-  if (F == 0) {
-    cerr << argv[0] << ": program doesn't contain function named '"
-         << ExtractFunc << "'!\n";
-    return 1;
+  // 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.
-  PassManager Passes;
-  Passes.add(new TargetData(M.get())); // Use correct TargetData
-  // Either isolate the function or delete it from the Module
-  Passes.add(createFunctionExtractionPass(F, DeleteFn, Relink));
+  legacy::PassManager Passes;
+  Passes.add(new DataLayoutPass()); // Use correct DataLayout
+
+  std::vector<GlobalValue*> Gvs(GVs.begin(), GVs.end());
+
+  Passes.add(createGVExtractionPass(Gvs, DeleteFn));
   if (!DeleteFn)
     Passes.add(createGlobalDCEPass());           // Delete unreachable globals
-  Passes.add(createDeadTypeEliminationPass());   // Remove dead types...
+  Passes.add(createStripDeadDebugInfoPass());    // Remove dead debug info
   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!
-      cerr << argv[0] << ": error opening '" << OutputFilename
-           << "': file exists!\n"
-           << "Use -f command line argument to force output\n";
-      return 1;
-    }
-    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
-    // FIXME: cout is not binary!
-    Out = &std::cout;
+  std::error_code EC;
+  tool_output_file Out(OutputFilename, EC, sys::fs::F_None);
+  if (EC) {
+    errs() << EC.message() << '\n';
+    return 1;
   }
 
-  Passes.add(CreateBitcodeWriterPass(*Out));
+  if (OutputAssembly)
+    Passes.add(createPrintModulePass(Out.os()));
+  else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
+    Passes.add(createBitcodeWriterPass(Out.os()));
+
   Passes.run(*M.get());
 
-  if (Out != &std::cout)
-    delete Out;
+  // Declare success.
+  Out.keep();
+
   return 0;
 }