#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int atoi(char *);
int calc_fib(int);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ printf(char *, ...);
int main(int argc, char *argv[]) {
  int i, n;
  if (argc == 2)
    n = atoi(argv[1]);
  else {
    printf("Usage: fibonacci num-of-sequence-values-to-print\n");
    exit(-1);
  }
  for (i = 0; i < n; i++)
    printf("%d ", calc_fib(i));
  printf("\n");
  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)
cmpl   $0x2,-0x8(%rbp)
jne    1175 <main+0x35>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atoi@plt>
mov    %eax,-0x18(%rbp)
jmp    118d <main+0x4d>
lea    0xe84(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    $0xffffffff,%edi
call   1060 <exit@plt>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x18(%rbp),%eax
jge    11c6 <main+0x86>
mov    -0x14(%rbp),%edi
call   1030 <calc_fib@plt>
mov    %eax,%esi
lea    0xe81(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1194 <main+0x54>
lea    0xe63(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r14
push   %rbx
cmp    $0x2,%edi
jne    11bb <main+0x5b>
mov    0x8(%rsi),%rdi
call   1070 <atoi@plt>
test   %eax,%eax
jle    11aa <main+0x4a>
mov    %eax,%ebx
lea    0xe81(%rip),%r14
xor    %ebp,%ebp
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %ebp,%edi
call   1050 <calc_fib@plt>
mov    %r14,%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1060 <printf@plt>
add    $0x1,%ebp
cmp    %ebp,%ebx
jne    1190 <main+0x30>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
pop    %rbx
pop    %r14
pop    %rbp
ret
lea    0xe42(%rip),%rdi
call   1040 <puts@plt>
mov    $0xffffffff,%edi
call   1080 <exit@plt>

LLVM IR (-O0):
@.str = [50 x i8] c"Usage: fibonacci num-of-sequence-values-to-print\0A\00"
@.str.1 = [4 x i8] c"%d \00"
@.str.2 = [2 x i8] c"\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp eq i32 %8, 2
br i1 %9, label %10, label %15
10: ; preds = %2
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i64 1
%13 = load i8*, i8** %12
%14 = call i32 @atoi(i8* %13)
store i32 %14, i32* %7
br label %18
15: ; preds = %2
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([50 x i8], [50 x i8]* @.str, i64 0, i64 0))
%17 = call i32 @exit(i32 -1)
unreachable
18: ; preds = %10
store i32 0, i32* %6
br label %19
19: ; preds = %27, %18
%20 = load i32, i32* %6
%21 = load i32, i32* %7
%22 = icmp slt i32 %20, %21
br i1 %22, label %23, label %30
23: ; preds = %19
%24 = load i32, i32* %6
%25 = call i32 @calc_fib(i32 %24)
%26 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %25)
br label %27
27: ; preds = %23
%28 = load i32, i32* %6
%29 = add nsw i32 %28, 1
store i32 %29, i32* %6
br label %19
30: ; preds = %19
%31 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.2, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [4 x i8] c"%d \00"
@str = [49 x i8] c"Usage: fibonacci num-of-sequence-values-to-print\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %4, label %9
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = tail call i32 @atoi(i8* %6)
%8 = icmp sgt i32 %7, 0
br i1 %8, label %12, label %18
9: ; preds = %2
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([49 x i8], [49 x i8]* @str, i64 0, i64 0))
%11 = tail call i32 @exit(i32 -1)
unreachable
12: ; preds = %4, %12
%13 = phi i32 [ %16, %12 ], [ 0, %4 ]
%14 = tail call i32 @calc_fib(i32 %13)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 %14)
%16 = add nuw nsw i32 %13, 1
%17 = icmp eq i32 %16, %7
br i1 %17, label %18, label %12
18: ; preds = %12, %4
%19 = tail call i32 @putchar(i32 10)
ret i32 0
}