writing module to .bc bitcode file

Question

i\'ve assumed that dumping a .bc file from a module was a trivial operation, but now, first time i have to actually do it from code, for the life of me i can\'t find one mis

Answer 1

The WriteModule function is static within lib/Bitcode/Writer/BitcodeWriter.cpp, which means it's not there for outside consumption (you can't even access it).

The same file has another function, however, called WriteBitcodeToFile, with this interface:

/// WriteBitcodeToFile - Write the specified module to the specified output
/// stream.
void llvm::WriteBitcodeToFile(const Module *M, raw_ostream &Out);

I can't imagine a more convenient interface. The header file declaring it is ./include/llvm/Bitcode/ReaderWriter.h, by the way.

Answer 2

I use following code :

std::error_code EC;
llvm::raw_fd_ostream OS("module", EC, llvm::sys::fs::F_None);
WriteBitcodeToFile(pBiFModule, OS);
OS.flush();

and then disassemble using llvm-dis.