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-extract/llvm-extract.cpp

@@ -19,6 +19,7 @@
 #include "llvm/Transforms/IPO.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Compressor.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Streams.h"
 #include "llvm/System/Signals.h"
@@ -57,7 +58,8 @@ int main(int argc, char **argv) {
     cl::ParseCommandLineOptions(argc, argv, " llvm extractor\n");
     sys::PrintStackTraceOnErrorSignal();
 
-    std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename));
+    std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename,
+                                            Compressor::decompressToNewBuffer));
     if (M.get() == 0) {
       cerr << argv[0] << ": bytecode didn't read correctly.\n";
       return 1;