cpp.c

int plus_one(int i) {
  return i + 1;
}
int main(void) {
  for (int i = 0; i < 10; ++i) {
    printf("%d\n", plus_one(i));
  }
  return 0;
}

out.js

function _plus_one($i) {
 $i = $i|0;
 var $0 = 0, $1 = 0, $2 = 0, label = 0, sp = 0;
 sp = STACKTOP;
 STACKTOP = STACKTOP + 16|0; if ((STACKTOP|0) >= (STACK_MAX|0)) abort();
 $0 = $i;
 $1 = $0;
 $2 = (($1) + 1)|0;
 STACKTOP = sp;return ($2|0);
}
function _main() {
 var $0 = 0, $1 = 0, $2 = 0, $3 = 0, $4 = 0, $5 = 0, $6 = 0, $i = 0, $vararg_buffer = 0, label = 0, sp = 0;
 sp = STACKTOP;
 STACKTOP = STACKTOP + 16|0; if ((STACKTOP|0) >= (STACK_MAX|0)) abort();
 $vararg_buffer = sp;
 $0 = 0;
 $i = 0;
 while(1) {
  $1 = $i;
  $2 = ($1|0)<(10);
  if (!($2)) {
   break;
  }
  $3 = $i;
  $4 = (_plus_one($3)|0);
  HEAP32[$vararg_buffer>>2] = $4;
  (_printf((8|0),($vararg_buffer|0))|0);
  $5 = $i;
  $6 = (($5) + 1)|0;
  $i = $6;
 }
 STACKTOP = sp;return 0;
}