Update llvm to r84119.

1 files changed, 114 insertions, 87 deletions

diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index 6891619..fe0e036 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -26,17 +26,15 @@
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/PassNameParser.h"
 #include "llvm/System/Signals.h"
+#include "llvm/Support/IRReader.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PluginLoader.h"
 #include "llvm/Support/StandardPasses.h"
-#include "llvm/Support/Streams.h"
 #include "llvm/Support/SystemUtils.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/LinkAllPasses.h"
 #include "llvm/LinkAllVMCore.h"
-#include <iostream>
-#include <fstream>
 #include <memory>
 #include <algorithm>
 using namespace llvm;
@@ -50,7 +48,7 @@ PassList(cl::desc("Optimizations available:"));
 // Other command line options...
 //
 static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input bitcode file>"), 
+InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
     cl::init("-"), cl::value_desc("filename"));
 
 static cl::opt<std::string>
@@ -58,7 +56,7 @@ OutputFilename("o", cl::desc("Override 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>
 PrintEachXForm("p", cl::desc("Print module after each transformation"));
@@ -68,6 +66,10 @@ NoOutput("disable-output",
          cl::desc("Do not write result bitcode file"), cl::Hidden);
 
 static cl::opt<bool>
+OutputAssembly("S",
+         cl::desc("Write output as LLVM assembly"), cl::Hidden);
+
+static cl::opt<bool>
 NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
 
 static cl::opt<bool>
@@ -80,15 +82,23 @@ StripDebug("strip-debug",
 static cl::opt<bool>
 DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
 
-static cl::opt<bool> 
-DisableOptimizations("disable-opt", 
+static cl::opt<bool>
+DisableOptimizations("disable-opt",
                      cl::desc("Do not run any optimization passes"));
 
 static cl::opt<bool>
-StandardCompileOpts("std-compile-opts", 
+DisableInternalize("disable-internalize",
+                   cl::desc("Do not mark all symbols as internal"));
+
+static cl::opt<bool>
+StandardCompileOpts("std-compile-opts",
                    cl::desc("Include the standard compile time optimizations"));
 
 static cl::opt<bool>
+StandardLinkOpts("std-link-opts",
+                 cl::desc("Include the standard link time optimizations"));
+
+static cl::opt<bool>
 OptLevelO1("O1",
            cl::desc("Optimization level 1. Similar to llvm-gcc -O1"));
 
@@ -102,7 +112,8 @@ OptLevelO3("O3",
 
 static cl::opt<bool>
 UnitAtATime("funit-at-a-time",
-            cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"));
+            cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
+	    cl::init(true));
 
 static cl::opt<bool>
 DisableSimplifyLibCalls("disable-simplify-libcalls",
@@ -123,23 +134,24 @@ namespace {
 struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
   static char ID;
   const PassInfo *PassToPrint;
-  CallGraphSCCPassPrinter(const PassInfo *PI) : 
+  CallGraphSCCPassPrinter(const PassInfo *PI) :
     CallGraphSCCPass(&ID), PassToPrint(PI) {}
 
-  virtual bool runOnSCC(const std::vector<CallGraphNode *>&SCC) {
+  virtual bool runOnSCC(std::vector<CallGraphNode *>&SCC) {
     if (!Quiet) {
-      cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+      outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
 
       for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
         Function *F = SCC[i]->getFunction();
-        if (F) 
-          getAnalysisID<Pass>(PassToPrint).print(cout, F->getParent());
+        if (F) {
+          getAnalysisID<Pass>(PassToPrint).print(outs(), F->getParent());
+        }
       }
     }
     // Get and print pass...
     return false;
   }
-  
+
   virtual const char *getPassName() const { return "'Pass' Printer"; }
 
   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
@@ -158,8 +170,8 @@ struct ModulePassPrinter : public ModulePass {
 
   virtual bool runOnModule(Module &M) {
     if (!Quiet) {
-      cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
-      getAnalysisID<Pass>(PassToPrint).print(cout, &M);
+      outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+      getAnalysisID<Pass>(PassToPrint).print(outs(), &M);
     }
 
     // Get and print pass...
@@ -182,12 +194,12 @@ struct FunctionPassPrinter : public FunctionPass {
                                             PassToPrint(PI) {}
 
   virtual bool runOnFunction(Function &F) {
-    if (!Quiet) { 
-      cout << "Printing analysis '" << PassToPrint->getPassName()
-           << "' for function '" << F.getName() << "':\n";
+    if (!Quiet) {
+      outs() << "Printing analysis '" << PassToPrint->getPassName()
+              << "' for function '" << F.getName() << "':\n";
     }
     // Get and print pass...
-    getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
+    getAnalysisID<Pass>(PassToPrint).print(outs(), F.getParent());
     return false;
   }
 
@@ -204,19 +216,19 @@ char FunctionPassPrinter::ID = 0;
 struct LoopPassPrinter : public LoopPass {
   static char ID;
   const PassInfo *PassToPrint;
-  LoopPassPrinter(const PassInfo *PI) : 
+  LoopPassPrinter(const PassInfo *PI) :
     LoopPass(&ID), PassToPrint(PI) {}
 
   virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
     if (!Quiet) {
-      cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
-      getAnalysisID<Pass>(PassToPrint).print(cout, 
+      outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+      getAnalysisID<Pass>(PassToPrint).print(outs(),
                                   L->getHeader()->getParent()->getParent());
     }
     // Get and print pass...
     return false;
   }
-  
+
   virtual const char *getPassName() const { return "'Pass' Printer"; }
 
   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
@@ -230,17 +242,17 @@ char LoopPassPrinter::ID = 0;
 struct BasicBlockPassPrinter : public BasicBlockPass {
   const PassInfo *PassToPrint;
   static char ID;
-  BasicBlockPassPrinter(const PassInfo *PI) 
+  BasicBlockPassPrinter(const PassInfo *PI)
     : BasicBlockPass(&ID), PassToPrint(PI) {}
 
   virtual bool runOnBasicBlock(BasicBlock &BB) {
     if (!Quiet) {
-      cout << "Printing Analysis info for BasicBlock '" << BB.getName()
-           << "': Pass " << PassToPrint->getPassName() << ":\n";
+      outs() << "Printing Analysis info for BasicBlock '" << BB.getName()
+             << "': Pass " << PassToPrint->getPassName() << ":\n";
     }
 
     // Get and print pass...
-    getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
+    getAnalysisID<Pass>(PassToPrint).print(outs(), BB.getParent()->getParent());
     return false;
   }
 
@@ -261,8 +273,8 @@ inline void addPass(PassManager &PM, Pass *P) {
   if (VerifyEach) PM.add(createVerifierPass());
 }
 
-/// AddOptimizationPasses - This routine adds optimization passes 
-/// based on selected optimization level, OptLevel. This routine 
+/// AddOptimizationPasses - This routine adds optimization passes
+/// based on selected optimization level, OptLevel. This routine
 /// duplicates llvm-gcc behaviour.
 ///
 /// OptLevel - Optimization Level
@@ -294,7 +306,7 @@ void AddStandardCompilePasses(PassManager &PM) {
   llvm::Pass *InliningPass = !DisableInline ? createFunctionInliningPass() : 0;
 
   // -std-compile-opts adds the same module passes as -O3.
-  createStandardModulePasses(&PM, 3, 
+  createStandardModulePasses(&PM, 3,
                              /*OptimizeSize=*/ false,
                              /*UnitAtATime=*/ true,
                              /*UnrollLoops=*/ true,
@@ -303,6 +315,20 @@ void AddStandardCompilePasses(PassManager &PM) {
                              InliningPass);
 }
 
+void AddStandardLinkPasses(PassManager &PM) {
+  PM.add(createVerifierPass());                  // Verify that input is correct
+
+  // If the -strip-debug command line option was specified, do it.
+  if (StripDebug)
+    addPass(PM, createStripSymbolsPass(true));
+
+  if (DisableOptimizations) return;
+
+  createStandardLTOPasses(&PM, /*Internalize=*/ !DisableInternalize,
+                          /*RunInliner=*/ !DisableInline,
+                          /*VerifyEach=*/ VerifyEach);
+}
+
 } // anonymous namespace
 
 
@@ -311,7 +337,7 @@ void AddStandardCompilePasses(PassManager &PM) {
 //
 int main(int argc, char **argv) {
   llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
-  LLVMContext Context;
+  LLVMContext &Context = getGlobalContext();
   try {
     cl::ParseCommandLineOptions(argc, argv,
       "llvm .bc -> .bc modular optimizer and analysis printer\n");
@@ -321,56 +347,41 @@ int main(int argc, char **argv) {
     // FIXME: The choice of target should be controllable on the command line.
     std::auto_ptr<TargetMachine> target;
 
-    std::string ErrorMessage;
+    SMDiagnostic Err;
 
     // Load the input module...
     std::auto_ptr<Module> M;
-    if (MemoryBuffer *Buffer
-          = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
-      M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
-      delete Buffer;
-    }
-    
+    M.reset(ParseIRFile(InputFilename, Err, Context));
+
     if (M.get() == 0) {
-      cerr << argv[0] << ": ";
-      if (ErrorMessage.size())
-        cerr << ErrorMessage << "\n";
-      else
-        cerr << "bitcode didn't read correctly.\n";
+      Err.Print(argv[0], errs());
       return 1;
     }
 
     // Figure out what stream we are supposed to write to...
-    // FIXME: cout is not binary!
-    std::ostream *Out = &std::cout;  // Default to printing to stdout...
+    // FIXME: outs() is not binary!
+    raw_ostream *Out = &outs();  // Default to printing to stdout...
     if (OutputFilename != "-") {
-      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);
-
-      if (!Out->good()) {
-        cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
-        return 1;
-      }
-
       // Make sure that the Output file gets unlinked from the disk if we get a
       // SIGINT
       sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+      std::string ErrorInfo;
+      Out = new raw_fd_ostream(OutputFilename.c_str(), ErrorInfo,
+                               raw_fd_ostream::F_Binary);
+      if (!ErrorInfo.empty()) {
+        errs() << ErrorInfo << '\n';
+        delete Out;
+        return 1;
+      }
     }
 
     // If the output is set to be emitted to standard out, and standard out is a
     // console, print out a warning message and refuse to do it.  We don't
     // impress anyone by spewing tons of binary goo to a terminal.
-    if (!Force && !NoOutput && CheckBitcodeOutputToConsole(Out,!Quiet)) {
-      NoOutput = true;
-    }
+    if (!Force && !NoOutput && !OutputAssembly)
+      if (CheckBitcodeOutputToConsole(*Out, !Quiet))
+        NoOutput = true;
 
     // Create a PassManager to hold and optimize the collection of passes we are
     // about to build...
@@ -385,7 +396,7 @@ int main(int argc, char **argv) {
       FPasses = new FunctionPassManager(new ExistingModuleProvider(M.get()));
       FPasses->add(new TargetData(M.get()));
     }
-      
+
     // If the -strip-debug command line option was specified, add it.  If
     // -std-compile-opts was also specified, it will handle StripDebug.
     if (StripDebug && !StandardCompileOpts)
@@ -395,12 +406,18 @@ int main(int argc, char **argv) {
     for (unsigned i = 0; i < PassList.size(); ++i) {
       // Check to see if -std-compile-opts was specified before this option.  If
       // so, handle it.
-      if (StandardCompileOpts && 
+      if (StandardCompileOpts &&
           StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
         AddStandardCompilePasses(Passes);
         StandardCompileOpts = false;
       }
-      
+
+      if (StandardLinkOpts &&
+          StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
+        AddStandardLinkPasses(Passes);
+        StandardLinkOpts = false;
+      }
+
       if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
         AddOptimizationPasses(Passes, *FPasses, 1);
         OptLevelO1 = false;
@@ -421,8 +438,8 @@ int main(int argc, char **argv) {
       if (PassInf->getNormalCtor())
         P = PassInf->getNormalCtor()();
       else
-        cerr << argv[0] << ": cannot create pass: "
-             << PassInf->getPassName() << "\n";
+        errs() << argv[0] << ": cannot create pass: "
+               << PassInf->getPassName() << "\n";
       if (P) {
         bool isBBPass = dynamic_cast<BasicBlockPass*>(P) != 0;
         bool isLPass = !isBBPass && dynamic_cast<LoopPass*>(P) != 0;
@@ -444,30 +461,36 @@ int main(int argc, char **argv) {
             Passes.add(new ModulePassPrinter(PassInf));
         }
       }
-      
+
       if (PrintEachXForm)
         Passes.add(createPrintModulePass(&errs()));
     }
-    
+
     // If -std-compile-opts was specified at the end of the pass list, add them.
     if (StandardCompileOpts) {
       AddStandardCompilePasses(Passes);
       StandardCompileOpts = false;
-    }    
+    }
+
+    if (StandardLinkOpts) {
+      AddStandardLinkPasses(Passes);
+      StandardLinkOpts = false;
+    }
 
     if (OptLevelO1) {
-        AddOptimizationPasses(Passes, *FPasses, 1);
-      }
+      AddOptimizationPasses(Passes, *FPasses, 1);
+    }
 
     if (OptLevelO2) {
-        AddOptimizationPasses(Passes, *FPasses, 2);
-      }
+      AddOptimizationPasses(Passes, *FPasses, 2);
+    }
 
     if (OptLevelO3) {
-        AddOptimizationPasses(Passes, *FPasses, 3);
-      }
+      AddOptimizationPasses(Passes, *FPasses, 3);
+    }
 
     if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+      FPasses->doInitialization();
       for (Module::iterator I = M.get()->begin(), E = M.get()->end();
            I != E; ++I)
         FPasses->run(*I);
@@ -477,22 +500,26 @@ int main(int argc, char **argv) {
     if (!NoVerify && !VerifyEach)
       Passes.add(createVerifierPass());
 
-    // Write bitcode out to disk or cout as the last step...
-    if (!NoOutput && !AnalyzeOnly)
-      Passes.add(CreateBitcodeWriterPass(*Out));
+    // Write bitcode or assembly  out to disk or outs() as the last step...
+    if (!NoOutput && !AnalyzeOnly) {
+      if (OutputAssembly)
+        Passes.add(createPrintModulePass(Out));
+      else
+        Passes.add(createBitcodeWriterPass(*Out));
+    }
 
     // Now that we have all of the passes ready, run them.
     Passes.run(*M.get());
 
-    // Delete the ofstream.
-    if (Out != &std::cout) 
+    // Delete the raw_fd_ostream.
+    if (Out != &outs())
       delete Out;
     return 0;
 
   } catch (const std::string& msg) {
-    cerr << argv[0] << ": " << msg << "\n";
+    errs() << argv[0] << ": " << msg << "\n";
   } catch (...) {
-    cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+    errs() << argv[0] << ": Unexpected unknown exception occurred.\n";
   }
   llvm_shutdown();
   return 1;