int main(int argc, const char *argv[]) {
  int i, atual, ant, antesdoant;
  printf("0 ");
  atual = 1;
  ant = 0;
  antesdoant = 1;
  for (i = 1; i <= 16; i++) {
    atual = ant + antesdoant;
    antesdoant = ant;
    ant = atual;
    if ("%d", atual <= 500) {
      printf("%d ", atual);
    }
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x1,-0x18(%rbp)
movl   $0x0,-0x1c(%rbp)
movl   $0x1,-0x20(%rbp)
movl   $0x1,-0x14(%rbp)
cmpl   $0x10,-0x14(%rbp)
jg     11a0 <main+0x90>
mov    -0x1c(%rbp),%eax
add    -0x20(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    -0x1c(%rbp),%eax
mov    %eax,-0x20(%rbp)
mov    -0x18(%rbp),%eax
mov    %eax,-0x1c(%rbp)
cmpl   $0x1f4,-0x18(%rbp)
jg     118d <main+0x7d>
mov    -0x18(%rbp),%esi
lea    0xe80(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1192 <main+0x82>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1150 <main+0x40>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xee8(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xedd(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xd,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x15,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x22,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x37,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x59,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x90,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0xe9,%esi
xor    %eax,%eax
call   1030 <printf@plt>
mov    %rbx,%rdi
mov    $0x179,%esi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"0 \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [4 x i8] c"%d \00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
%8 = alloca i32
%9 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32 1, i32* %7
store i32 0, i32* %8
store i32 1, i32* %9
store i32 1, i32* %6
br label %11
11: ; preds = %26, %2
%12 = load i32, i32* %6
%13 = icmp sle i32 %12, 16
br i1 %13, label %14, label %29
14: ; preds = %11
%15 = load i32, i32* %8
%16 = load i32, i32* %9
%17 = add nsw i32 %15, %16
store i32 %17, i32* %7
%18 = load i32, i32* %8
store i32 %18, i32* %9
%19 = load i32, i32* %7
store i32 %19, i32* %8
%20 = load i32, i32* %7
%21 = icmp sle i32 %20, 500
br i1 %21, label %22, label %25
22: ; preds = %14
%23 = load i32, i32* %7
%24 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %23)
br label %25
25: ; preds = %22, %14
br label %26
26: ; preds = %25
%27 = load i32, i32* %6
%28 = add nsw i32 %27, 1
store i32 %28, i32* %6
br label %11
29: ; preds = %11
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"0 \00"
@.str.2 = [4 x i8] c"%d \00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%4 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 1)
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 1)
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 2)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 3)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 5)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 8)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 13)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 21)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 34)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 55)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 89)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 144)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 233)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 377)
ret i32 0
}