brainfuck.js

var program = "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.";
var memory = [];
var ptr = 0;
var stack = [];
var ip = 0;
while(ip !== program.length) {
	if(program[ip] === '[') {
		if(!memory[ptr]) {
			var nesting = 0;
			while(true) {
				if(program[ip] === '[') {
					++nesting;
				} else if(program[ip] === ']') {
					if(--nesting === 0) {
						break;
					}
				}
				++ip;
			}
		} else {
			stack.push(ip);
		}
	} else if(program[ip] === ']') {
		ip = stack.pop();
		continue;
	} else if(program[ip] === '>') {
		++ptr;
	} else if(program[ip] === '<') {
		--ptr;
	} else if(program[ip] === '+') {
		memory[ptr] = (memory[ptr] || 0) + 1;
	} else if(program[ip] === '-') {
		memory[ptr] = (memory[ptr] || 0) - 1;
	} else if(program[ip] === '.') {
		console.log(String.fromCharCode(memory[ptr]));
	}
	++ip;
}

output.tsasm

main:
    .local      program
    .local      memory
    .local      ptr
    .local      stack
    .local      ip
    .local      nesting
    push        "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>."
    set         program
    array       0
    set         memory
    push        0
    set         ptr
    array       0
    set         stack
    push        0
    set         ip
    push        ip
    push        program
    member      length
    seq         
    not         
    jif         163
    push        program
    push        ip
    index       
    push        "["
    seq         
    jif         71
    push        memory
    push        ptr
    index       
    not         
    jif         65
    push        0
    set         nesting
    true        
    jif         64
    push        program
    push        ip
    index       
    push        "["
    seq         
    jif         47
    push        nesting
    inc         
    set         nesting
    jmp         60
    push        program
    push        ip
    index       
    push        "]"
    seq         
    jif         60
    push        nesting
    dec         
    set         nesting
    push        0
    seq         
    jif         60
    jmp         64
    push        ip
    inc         
    set         ip
    jmp         35
    jmp         70
    push        stack
    dup         
    member      push
    push        ip
    thiscall    1
    jmp         159
    push        program
    push        ip
    index       
    push        "]"
    seq         
    jif         84
    push        stack
    dup         
    member      pop
    thiscall    0
    set         ip
    push        continue
    jmp         159
    push        program
    push        ip
    index       
    push        ">"
    seq         
    jif         94
    push        ptr
    inc         
    set         ptr
    jmp         159
    push        program
    push        ip
    index       
    push        "<"
    seq         
    jif         104
    push        ptr
    dec         
    set         ptr
    jmp         159
    push        program
    push        ip
    index       
    push        "+"
    seq         
    jif         123
    push        memory
    push        ptr
    index       
    dup         
    jit         119
    pop         
    push        0
    push        1
    add         
    push        memory
    push        ptr
    setindex    
    jmp         159
    push        program
    push        ip
    index       
    push        "-"
    seq         
    jif         142
    push        memory
    push        ptr
    index       
    dup         
    jit         138
    pop         
    push        0
    push        1
    sub         
    push        memory
    push        ptr
    setindex    
    jmp         159
    push        program
    push        ip
    index       
    push        "."
    seq         
    jif         159
    push        console
    dup         
    member      log
    push        String
    dup         
    member      fromCharCode
    push        memory
    push        ptr
    index       
    thiscall    1
    thiscall    1
    push        ip
    inc         
    set         ip
    jmp         16
    undefined   
    ret