llvm-mc — LLVM Machine Code Playground. It provides a set of tools for working with LLVM machine code. Part of

Assemble assembly code file into object file with machine code

llvm-mc --filetype=obj -o {{path/to/output.o}} {{path/to/input.s}}

Disassemble object file with machine code into assembly code file

llvm-mc --disassemble -o {{path/to/output.s}} {{path/to/input.o}}

Compile LLVM bit code file into assembly code

llvm-mc -o {{path/to/output.s}} {{path/to/input.bc}}

Assemble assembly code from `stdin` and show encoding to `stdout`

echo "{{addl %eax, %ebx}}" | llvm-mc -show-encoding -show-inst

Disassemble machine code from `stdin` for specified triple

echo "{{0xCD 0x21}}" | llvm-mc --disassemble -triple={{target_name}}