brainfuck.js

var program = "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.";
var memory = [0];
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;
		memory[ptr] = memory[ptr] || 0;
	} else if(program[ip] === '<') {
		--ptr;
		memory[ptr] = memory[ptr] || 0;
	} else if(program[ip] === '+') {
		memory[ptr] += 1;
	} else if(program[ip] === '-') {
		memory[ptr] -= 1;
	} else if(program[ip] === '.') {
		console._print(String.fromCharCode(memory[ptr]));
	}
	++ip;
}

output.tsasm

main:
    .local      program
    .local      memory
    .local      ptr
    .local      stack
    .local      ip
    .local      nesting
    push        "++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>."
    set         program
    push        0
    array       1
    set         memory
    push        0
    set         ptr
    array       0
    set         stack
    push        0
    set         ip
    push        ip
    push        program
    member      length
    lt          
    jif         173
    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         169
    push        program
    push        ip
    index       
    push        "]"
    seq         
    jif         84
    push        stack
    dup         
    member      pop
    thiscall    0
    set         ip
    jmp         17
    jmp         169
    push        program
    push        ip
    index       
    push        ">"
    seq         
    jif         104
    push        ptr
    inc         
    set         ptr
    push        memory
    push        ptr
    push        memory
    push        ptr
    index       
    dup         
    jit         102
    pop         
    push        0
    setindex    
    jmp         169
    push        program
    push        ip
    index       
    push        "<"
    seq         
    jif         124
    push        ptr
    dec         
    set         ptr
    push        memory
    push        ptr
    push        memory
    push        ptr
    index       
    dup         
    jit         122
    pop         
    push        0
    setindex    
    jmp         169
    push        program
    push        ip
    index       
    push        "+"
    seq         
    jif         138
    push        memory
    push        ptr
    dup         2
    index       
    push        1
    add         
    setindex    
    jmp         169
    push        program
    push        ip
    index       
    push        "-"
    seq         
    jif         152
    push        memory
    push        ptr
    dup         2
    index       
    push        1
    sub         
    setindex    
    jmp         169
    push        program
    push        ip
    index       
    push        "."
    seq         
    jif         169
    push        console
    dup         
    member      _print
    push        String
    dup         
    member      fromCharCode
    push        memory
    push        ptr
    index       
    thiscall    1
    thiscall    1
    push        ip
    inc         
    set         ip
    jmp         17
    undefined   
    ret