BF_JIT
This is a simple interpreter for the Brainfuck language. It uses a 3 address code IR format to perform some useful optimizations, which it then just in time compiles into x86_64 machine code. As a result of this approach, this interpreter only supports the x86_64 platform. The memory array wraps around, so programs that depend on that functionality should work. 8, 16 and 32 bit cells are supported.
Build
$ git submodule update --init
$ make
Usage
$ ./bf --help
Usage:
bf_jit [OPTION...] [input files]
-m, --mem-size arg Number of memory cells (default: 32768)
--file-names arg BF source file names
-d, --dump-code Dump the generated machine code
--dump-mem Dump the first 32 cells of memory after
termination
-e, --eof-behaviour arg Behaviour on eof (one of return-0, return-255,
dont-modify) (default: return-0)
-g, --gen-syms Generate jit symbol maps for debugging purposes
-h, --help Print help
-n, --no-flush Don't flush after each character
-w, --cell-bit-width arg Width of cell in bits (default: 8)
--use-interpreter Don't jit the IR, just interpret it
-v, --verbose Print more information
Roadmap
- Improve constant folding and const propagation
- Improve const analysis