Print the tool name when an error comes from so that I can tell which

[oota-llvm.git] / tools / gccld / gccld.cpp

diff --git a/tools/gccld/gccld.cpp b/tools/gccld/gccld.cpp
index cb77bb03c064a34d80188af8c163bc58540ca149..51131052b42074104add1b148bf648b649004c29 100644 (file)
--- a/tools/gccld/gccld.cpp
+++ b/tools/gccld/gccld.cpp
@@ -14,25 +14,43 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Transforms/Linker.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/Writer.h"
+#include "llvm/Transforms/Utils/Linker.h"
 #include "llvm/Module.h"
-#include "llvm/Method.h"
+#include "llvm/PassManager.h"
+#include "llvm/Bytecode/Reader.h"
+#include "llvm/Bytecode/WriteBytecodePass.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/Scalar.h"
 #include "Support/CommandLine.h"
+#include "Support/Signals.h"
 #include <fstream>
 #include <memory>
 #include <algorithm>
 #include <sys/types.h>     // For FileExists
 #include <sys/stat.h>
+using std::cerr;
+
+static cl::list<std::string> 
+InputFilenames(cl::Positional, cl::desc("<input bytecode files>"),
+               cl::OneOrMore);
+
+static cl::opt<std::string> 
+OutputFilename("o", cl::desc("Override output filename"), cl::init("a.out"),
+               cl::value_desc("filename"));
+
+static cl::opt<bool>    
+Verbose("v", cl::desc("Print information about actions taken"));
 
+static cl::list<std::string> 
+LibPaths("L", cl::desc("Specify a library search path"), cl::Prefix,
+         cl::value_desc("directory"));
 
-cl::StringList InputFilenames("", "Load <arg> files, linking them together", 
-                             cl::OneOrMore);
-cl::String OutputFilename("o", "Override output filename", cl::NoFlags,"a.out");
-cl::Flag   Verbose       ("v", "Print information about actions taken");
-cl::StringList LibPaths  ("L", "Specify a library search path", cl::ZeroOrMore);
-cl::StringList Libraries ("l", "Specify libraries to link to", cl::ZeroOrMore);
+static cl::list<std::string> 
+Libraries("l", cl::desc("Specify libraries to link to"), cl::Prefix,
+          cl::value_desc("library prefix"));
+
+static cl::opt<bool>
+Strip("s", cl::desc("Strip symbol info from executable"));
 
 
 // FileExists - Return true if the specified string is an openable file...
@@ -60,7 +78,7 @@ static inline std::auto_ptr<Module> LoadFile(const std::string &FN) {
     if (Verbose) {
       cerr << "Error opening bytecode file: '" << Filename << "'";
       if (ErrorMessage.size()) cerr << ": " << ErrorMessage;
-      cerr << endl;
+      cerr << "\n";
     }
     
     if (NextLibPathIdx == LibPaths.size()) break;
@@ -76,20 +94,15 @@ static inline std::auto_ptr<Module> LoadFile(const std::string &FN) {
 }
 
 
-
-
 int main(int argc, char **argv) {
-  cl::ParseCommandLineOptions(argc, argv, " llvm linker for GCC\n",
-                             cl::EnableSingleLetterArgValue |
-                             cl::DisableSingleLetterArgGrouping);
-  assert(InputFilenames.size() > 0 && "OneOrMore is not working");
+  cl::ParseCommandLineOptions(argc, argv, " llvm linker for GCC\n");
 
   unsigned BaseArg = 0;
   std::string ErrorMessage;
 
   if (!Libraries.empty()) {
     // Sort libraries list...
-    sort(Libraries.begin(), Libraries.end());
+    std::sort(Libraries.begin(), Libraries.end());
 
     // Remove duplicate libraries entries...
     Libraries.erase(unique(Libraries.begin(), Libraries.end()),
@@ -110,26 +123,66 @@ int main(int argc, char **argv) {
     if (Verbose) cerr << "Linking in '" << InputFilenames[i] << "'\n";
 
     if (LinkModules(Composite.get(), M.get(), &ErrorMessage)) {
-      cerr << "Error linking in '" << InputFilenames[i] << "': "
-          << ErrorMessage << endl;
+      cerr << argv[0] << ": error linking in '" << InputFilenames[i] << "': "
+          << ErrorMessage << "\n";
       return 1;
     }
   }
 
+  // In addition to just linking the input from GCC, we also want to spiff it up
+  // a little bit.  Do this now.
+  //
+  PassManager Passes;
+
+  // Linking modules together can lead to duplicated global constants, only keep
+  // one copy of each constant...
+  //
+  Passes.add(createConstantMergePass());
+
+  // If the -s command line option was specified, strip the symbols out of the
+  // resulting program to make it smaller.  -s is a GCC option that we are
+  // supporting.
+  //
+  if (Strip)
+    Passes.add(createSymbolStrippingPass());
+
+  // Often if the programmer does not specify proper prototypes for the
+  // functions they are calling, they end up calling a vararg version of the
+  // function that does not get a body filled in (the real function has typed
+  // arguments).  This pass merges the two functions.
+  //
+  Passes.add(createFunctionResolvingPass());
+
+  // Now that composite has been compiled, scan through the module, looking for
+  // a main function.  If main is defined, mark all other functions internal.
+  //
+  Passes.add(createInternalizePass());
+
+  // Now that we have optimized the program, discard unreachable functions...
+  //
+  Passes.add(createGlobalDCEPass());
+
+  // Add the pass that writes bytecode to the output file...
   std::ofstream Out((OutputFilename+".bc").c_str());
   if (!Out.good()) {
-    cerr << "Error opening '" << OutputFilename << ".bc' for writing!\n";
+    cerr << argv[0] << ": error opening '" << OutputFilename
+         << ".bc' for writing!\n";
     return 1;
   }
+  Passes.add(new WriteBytecodePass(&Out));        // Write bytecode to file...
+
+  // Make sure that the Out file gets unlink'd from the disk if we get a SIGINT
+  RemoveFileOnSignal(OutputFilename+".bc");
 
-  if (Verbose) cerr << "Writing bytecode...\n";
-  WriteBytecodeToFile(Composite.get(), Out);
+  // Run our queue of passes all at once now, efficiently.
+  Passes.run(*Composite.get());
   Out.close();
 
   // Output the script to start the program...
   std::ofstream Out2(OutputFilename.c_str());
   if (!Out2.good()) {
-    cerr << "Error openeing '" << OutputFilename << "' for writing!\n";
+    cerr << argv[0] << ": error opening '" << OutputFilename
+         << "' for writing!\n";
     return 1;
   }
   Out2 << "#!/bin/sh\nlli -q $0.bc $*\n";