What is llvm-dis?

The llvm-dis command is the LLVM disassembler. It takes an LLVM bitcode file and converts it into human-readable LLVM assembly language.

If the input is being read from standard input, then llvm-dis will send its output to standard output by default. Otherwise, the output will be written to a file named after the input file, with a .ll suffix added (any existing .bc suffix will first be removed). You can override the choice of output file using the -o option.