This is a brainfuck compiler I wrote in C. It compiles Brainfuck to x64 asm. Brainfuck is explained here.
The compiler optimizes strings of increment/decrement instructions into single add/sub instructions, so for example +++++ is compiled to addb $5, (%rdi).
The program allocates 30 kB at the beginning of the program, and does not dynamically reallocate if you increment the data pointer past the end, so doing too many > moves will cause a segfault.
The argument following this flag will be the output file name. The default file name is "a.s".
By default, the output assembly will be for the SysV ABI. By passing this flag, the output assembly will be for Windows.