#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 /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int i, n;
  printf("> n = ");
  scanf("%i", &n);
  for (i = 0; i < n; i++) {
    printf("%i\n", i);
  }
  printf("i_final = %i\n", i);
  printf("\n");
  i = 0;
start:
  printf("%i\n", i++);
  if (i < n)
    goto start;
  printf("i_final = %i\n", i);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec3(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    117f <main+0x5f>
mov    -0x8(%rbp),%esi
lea    0xeaa(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1154 <main+0x34>
mov    -0x8(%rbp),%esi
lea    0xe81(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe7f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%esi
mov    %esi,%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
lea    0xe5d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    11cf <main+0xaf>
jmp    11a5 <main+0x85>
mov    -0x8(%rbp),%esi
lea    0xe31(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xec5(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xebe(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,0x4(%rsp)
mov    $0x0,%ebx
jle    1185 <main+0x55>
lea    0xeae(%rip),%r14
xor    %ebx,%ebx
nopl   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%ebx
cmp    0x4(%rsp),%ebx
jl     1170 <main+0x40>
lea    0xe7e(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xe6e(%rip),%r14
xor    %ebx,%ebx
nopl   0x0(%rax,%rax,1)
mov    %ebx,%esi
lea    0x1(%rsi),%ebx
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
cmp    0x4(%rsp),%ebx
jl     11b0 <main+0x80>
lea    0xe3e(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [7 x i8] c"> n = \00"
@.str.1 = [3 x i8] c"%i\00"
@.str.2 = [4 x i8] c"%i\0A\00"
@.str.3 = [14 x i8] c"i_final = %i\0A\00"
@.str.4 = [2 x i8] c"\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
store i32 0, i32* %2
br label %6
6: ; preds = %13, %0
%7 = load i32, i32* %2
%8 = load i32, i32* %3
%9 = icmp slt i32 %7, %8
br i1 %9, label %10, label %16
10: ; preds = %6
%11 = load i32, i32* %2
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %11)
br label %13
13: ; preds = %10
%14 = load i32, i32* %2
%15 = add nsw i32 %14, 1
store i32 %15, i32* %2
br label %6
16: ; preds = %6
%17 = load i32, i32* %2
%18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), i32 %17)
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.4, i64 0, i64 0))
store i32 0, i32* %2
br label %20
20: ; preds = %27, %16
%21 = load i32, i32* %2
%22 = add nsw i32 %21, 1
store i32 %22, i32* %2
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %21)
%24 = load i32, i32* %2
%25 = load i32, i32* %3
%26 = icmp slt i32 %24, %25
br i1 %26, label %27, label %28
27: ; preds = %20
br label %20
28: ; preds = %20
%29 = load i32, i32* %2
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), i32 %29)
%31 = load i32, i32* %1
ret i32 %31
}

LLVM IR (-O2):
@.str = [7 x i8] c"> n = \00"
@.str.1 = [3 x i8] c"%i\00"
@.str.2 = [4 x i8] c"%i\0A\00"
@.str.3 = [14 x i8] c"i_final = %i\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%5 = load i32, i32* %1
%6 = icmp sgt i32 %5, 0
br i1 %6, label %7, label %13
7: ; preds = %0, %7
%8 = phi i32 [ %10, %7 ], [ 0, %0 ]
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %8)
%10 = add nuw nsw i32 %8, 1
%11 = load i32, i32* %1
%12 = icmp slt i32 %10, %11
br i1 %12, label %7, label %13
13: ; preds = %7, %0
%14 = phi i32 [ 0, %0 ], [ %10, %7 ]
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), i32 %14)
%16 = call i32 @putchar(i32 10)
br label %17
17: ; preds = %17, %13
%18 = phi i32 [ 0, %13 ], [ %19, %17 ]
%19 = add nuw nsw i32 %18, 1
%20 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i32 %18)
%21 = load i32, i32* %1
%22 = icmp slt i32 %19, %21
br i1 %22, label %17, label %23
23: ; preds = %17
%24 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @.str.3, i64 0, i64 0), i32 %19)
ret i32 0
}