push bytecode decompressor out through APIs. Now the bytecode reader

api's look like this:

ModuleProvider *getBytecodeModuleProvider(
  const std::string &Filename,  ///< Name of file to be read
  BCDecompressor_t *BCDC = Compressor::decompressToNewBuffer,
  std::string* ErrMsg = 0,      ///< Optional error message holder
  BytecodeHandler* H = 0        ///< Optional handler for reader events
);

This is ugly, but allows a client to say:

  getBytecodeModuleProvider("foo", 0);

If they do this, there is no dependency on the compression libraries, saving
codesize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34012 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-dis/llvm-dis.cpp

@@ -20,6 +20,7 @@
 #include "llvm/PassManager.h"
 #include "llvm/Bytecode/Reader.h"
 #include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Support/Compressor.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Streams.h"
@@ -51,7 +52,9 @@ int main(int argc, char **argv) {
     std::ostream *Out = &std::cout;  // Default to printing to stdout.
     std::string ErrorMessage;
 
-    std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
+    std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, 
+                                              Compressor::decompressToNewBuffer,
+                                              &ErrorMessage));
     if (M.get() == 0) {
       cerr << argv[0] << ": ";
       if (ErrorMessage.size())