Enable streaming of bitcode

This CL delays reading of function bodies from initial parse until
materialization, allowing overlap of compilation with bitcode download.

llvm-svn: 149918

llvm/tools/llvm-objdump/llvm-objdump.h

@@ -31,9 +31,9 @@ public:
   StringRefMemoryObject(StringRef bytes) : Bytes(bytes) {}
 
   uint64_t getBase() const { return 0; }
-  uint64_t getExtent() const { return Bytes.size(); }
+  uint64_t getExtent() { return Bytes.size(); }
 
-  int readByte(uint64_t Addr, uint8_t *Byte) const {
+  int readByte(uint64_t Addr, uint8_t *Byte) {
     if (Addr >= getExtent())
       return -1;
     *Byte = Bytes[Addr];