teach this to read from bitcode files

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36843 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Debugger/Debugger.cpp

@@ -15,11 +15,15 @@
 #include "llvm/Module.h"
 #include "llvm/ModuleProvider.h"
 #include "llvm/Bytecode/Reader.h"
+#include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/Debugger/InferiorProcess.h"
+#include "llvm/Support/MemoryBuffer.h"
 #include "llvm/ADT/StringExtras.h"
 #include <memory>
 using namespace llvm;
 
+static bool Bitcode = false;
+
 /// Debugger constructor - Initialize the debugger to its initial, empty, state.
 ///
 Debugger::Debugger() : Environment(0), Program(0), Process(0) {
@@ -45,7 +49,15 @@ std::string Debugger::getProgramPath() const {
 
 static Module *
 getMaterializedModuleProvider(const std::string &Filename) {
-  return ParseBytecodeFile(Filename);
+  if (Bitcode) {
+    return ParseBytecodeFile(Filename);
+  } else {
+    std::auto_ptr<MemoryBuffer> Buffer;
+    Buffer.reset(MemoryBuffer::getFileOrSTDIN(&Filename[0], Filename.size()));
+    if (Buffer.get())
+      return ParseBitcodeFile(Buffer.get());
+    return 0;
+  }
 }
 
 /// loadProgram - If a program is currently loaded, unload it.  Then search