add bitcode reading support to llvm-nm

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36847 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-nm/Makefile

@@ -9,7 +9,6 @@
 LEVEL = ../..
 
 TOOLNAME = llvm-nm
-LINK_COMPONENTS = archive bcreader
-REQUIRES_EH := 1
+LINK_COMPONENTS = archive bcreader bitreader
 
 include $(LEVEL)/Makefile.common

tools/llvm-nm/llvm-nm.cpp

@@ -17,19 +17,22 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Module.h"
+#include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Bytecode/Reader.h"
 #include "llvm/Bytecode/Archive.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
 #include "llvm/System/Signals.h"
 #include <algorithm>
 #include <cctype>
 #include <cerrno>
 #include <cstring>
 #include <iostream>
-
 using namespace llvm;
 
+cl::opt<bool> Bitcode("bitcode");
+
 namespace {
   enum OutputFormatTy { bsd, sysv, posix };
   cl::opt<OutputFormatTy>
@@ -132,6 +135,20 @@ static void DumpSymbolNamesFromFile(std::string &Filename) {
       std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
       return;
     }
+  } else if (aPath.isBitcodeFile()) {
+    std::auto_ptr<MemoryBuffer> Buffer(
+                   MemoryBuffer::getFileOrSTDIN(&Filename[0], Filename.size()));
+    Module *Result = 0;
+    if (Buffer.get())
+      Result = ParseBitcodeFile(Buffer.get(), &ErrorMessage);
+    
+    if (Result)
+      DumpSymbolNamesFromModule(Result);
+    else {
+      std::cerr << ToolName << ": " << Filename << ": " << ErrorMessage << "\n";
+      return;
+    }
+    
   } else if (aPath.isArchive()) {
     std::string ErrMsg;
     Archive* archive = Archive::OpenAndLoad(sys::Path(Filename), &ErrorMessage);
@@ -153,7 +170,6 @@ static void DumpSymbolNamesFromFile(std::string &Filename) {
 
 int main(int argc, char **argv) {
   llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
-  try {
   cl::ParseCommandLineOptions(argc, argv, " llvm symbol table dumper\n");
   sys::PrintStackTraceOnErrorSignal();
 
@@ -170,10 +186,4 @@ int main(int argc, char **argv) {
   std::for_each(InputFilenames.begin(), InputFilenames.end(),
                 DumpSymbolNamesFromFile);
   return 0;
-  } catch (const std::string& msg) {
-    std::cerr << argv[0] << ": " << msg << "\n";
-  } catch (...) {
-    std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
-  }
-  return 1;
 }