#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);
scalar_t__ scanf(char *, int *);
int main() {
  int a = 5;
  int i = 1;
  while (scanf("%d", &a) && a != 0) {
    printf("%d\n\n\n", a);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x5,-0x8(%rbp)
movl   $0x1,-0xc(%rbp)
lea    0xebc(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    $0x0,%rcx
mov    %al,-0xd(%rbp)
je     1169 <main+0x49>
cmpl   $0x0,-0x8(%rbp)
setne  %al
mov    %al,-0xd(%rbp)
mov    -0xd(%rbp),%al
test   $0x1,%al
jne    1179 <main+0x59>
jmp    118d <main+0x6d>
mov    -0x8(%rbp),%esi
lea    0xe80(%rip),%rdi
call   1030 <printf@plt>
jmp    113d <main+0x1d>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
movl   $0x5,0xc(%rsp)
lea    0xec8(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1040 <scanf@plt>
test   %rax,%rax
je     1190 <main+0x70>
mov    0xc(%rsp),%esi
test   %esi,%esi
je     1190 <main+0x70>
lea    0xead(%rip),%r14
lea    0xea3(%rip),%r15
lea    0xc(%rsp),%rbx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax)
mov    %r14,%rdi
call   1030 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1040 <scanf@plt>
test   %rax,%rax
je     1190 <main+0x70>
mov    0xc(%rsp),%esi
test   %esi,%esi
jne    1170 <main+0x50>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%d\00"
@.str.1 = [6 x i8] c"%d\0A\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 5, i32* %2
store i32 1, i32* %3
br label %4
4: ; preds = %12, %0
%5 = call i64 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %2)
%6 = icmp ne i64 %5, 0
br i1 %6, label %7, label %10
7: ; preds = %4
%8 = load i32, i32* %2
%9 = icmp ne i32 %8, 0
br label %10
10: ; preds = %7, %4
%11 = phi i1 [ false, %4 ], [ %9, %7 ]
br i1 %11, label %12, label %15
12: ; preds = %10
%13 = load i32, i32* %2
%14 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %13)
br label %4
15: ; preds = %10
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%d\00"
@.str.1 = [6 x i8] c"%d\0A\0A\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 5, i32* %1
%3 = call i64 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%4 = icmp ne i64 %3, 0
%5 = load i32, i32* %1
%6 = icmp ne i32 %5, 0
%7 = select i1 %4, i1 %6, i1 false
br i1 %7, label %8, label %16
8: ; preds = %0, %8
%9 = phi i32 [ %13, %8 ], [ %5, %0 ]
%10 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i64 0, i64 0), i32 %9)
%11 = call i64 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i32* %1)
%12 = icmp ne i64 %11, 0
%13 = load i32, i32* %1
%14 = icmp ne i32 %13, 0
%15 = select i1 %12, i1 %14, i1 false
br i1 %15, label %8, label %16
16: ; preds = %8, %0
ret i32 0
}