#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 scanf(char *, int *);
main() {
  int val;
  int status = 0;
  while (status < 1) {
    printf("Enter an integer: ");
    status = scanf("%d", &val);
    if (status == 0)
      printf("That was not an integer!\n");
  }
  printf("The integer entered was %d.\n", val);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x0,-0xc(%rbp)
cmpl   $0x1,-0xc(%rbp)
jge    117e <main+0x5e>
lea    0xeb9(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebe(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
mov    %eax,-0xc(%rbp)
cmpl   $0x0,-0xc(%rbp)
jne    1179 <main+0x59>
lea    0xea4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1136 <main+0x16>
mov    -0x8(%rbp),%esi
lea    0xea8(%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   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
sub    $0x10,%rsp
lea    0xebd(%rip),%r14
lea    0xec9(%rip),%r15
lea    0xc(%rsp),%rbx
lea    0xedd(%rip),%r12
jmp    1164 <main+0x34>
nopl   0x0(%rax,%rax,1)
test   %ebp,%ebp
jg     1189 <main+0x59>
mov    %r14,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
mov    %eax,%ebp
test   %eax,%eax
jne    1160 <main+0x30>
mov    %r12,%rdi
call   1030 <puts@plt>
jmp    1160 <main+0x30>
mov    0xc(%rsp),%esi
lea    0xe82(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [19 x i8] c"Enter an integer: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [26 x i8] c"That was not an integer!\0A\00"
@.str.3 = [29 x i8] c"The integer entered was %d.\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
store i32 0, i32* %1
store i32 0, i32* %3
br label %4
4: ; preds = %14, %0
%5 = load i32, i32* %3
%6 = icmp slt i32 %5, 1
br i1 %6, label %7, label %15
7: ; preds = %4
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
store i32 %9, i32* %3
%10 = load i32, i32* %3
%11 = icmp eq i32 %10, 0
br i1 %11, label %12, label %14
12: ; preds = %7
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.2, i64 0, i64 0))
br label %14
14: ; preds = %12, %7
br label %4
15: ; preds = %4
%16 = load i32, i32* %2
%17 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0), i32 %16)
%18 = load i32, i32* %1
ret i32 %18
}

LLVM IR (-O2):
@.str = [19 x i8] c"Enter an integer: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.3 = [29 x i8] c"The integer entered was %d.\0A\00"
@str = [25 x i8] c"That was not an integer!\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %0, %9
%4 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 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* %1)
%6 = icmp eq i32 %5, 0
br i1 %6, label %7, label %9
7: ; preds = %3
%8 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str, i64 0, i64 0))
br label %9
9: ; preds = %7, %3
%10 = icmp slt i32 %5, 1
br i1 %10, label %3, label %11
11: ; preds = %9
%12 = load i32, i32* %1
%13 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0), i32 %12)
ret i32 0
}