#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*/ func1(int);
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main(int argc, char *argv[]) {
  int nbr;
  for (;;) {
    puts("\nEnter an integer between 1 and 10, 0 to exit: ");
    scanf("%d", &nbr);
    if (nbr == 0)
      break;
    func1(nbr);
  }
  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    0xeb3(%rip),%rdi
call   1040 <puts@plt>
lea    0xed7(%rip),%rdi
lea    -0x14(%rbp),%rsi
call   1050 <scanf@plt>
cmpl   $0x0,-0x14(%rbp)
jne    1171 <main+0x41>
jmp    117e <main+0x4e>
mov    -0x14(%rbp),%edi
call   1030 <func1@plt>
jmp    1146 <main+0x16>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %rbx
sub    $0x10,%rsp
lea    0xec0(%rip),%rdi
call   1040 <puts@plt>
lea    0xee4(%rip),%rdi
lea    0xc(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%edi
test   %edi,%edi
je     11a0 <main+0x70>
lea    0xe9b(%rip),%r14
lea    0xec4(%rip),%r15
lea    0xc(%rsp),%rbx
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
call   1030 <func1@plt>
mov    %r14,%rdi
call   1040 <puts@plt>
mov    %r15,%rdi
mov    %rbx,%rsi
call   1050 <scanf@plt>
mov    0xc(%rsp),%edi
test   %edi,%edi
jne    1180 <main+0x50>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [48 x i8] c"\0AEnter an integer between 1 and 10, 0 to exit: \00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
br label %7
7: ; preds = %13, %2
%8 = call i32 @puts(i8* getelementptr inbounds ([48 x i8], [48 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* %6)
%10 = load i32, i32* %6
%11 = icmp eq i32 %10, 0
br i1 %11, label %12, label %13
12: ; preds = %7
br label %16
13: ; preds = %7
%14 = load i32, i32* %6
%15 = call i32 @func1(i32 %14)
br label %7
16: ; preds = %12
ret i32 0
}

LLVM IR (-O2):
@.str = [48 x i8] c"\0AEnter an integer between 1 and 10, 0 to exit: \00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca i32
%4 = bitcast i32* %3 to i8*
%5 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%7 = load i32, i32* %3
%8 = icmp eq i32 %7, 0
br i1 %8, label %16, label %9
9: ; preds = %2, %9
%10 = phi i32 [ %14, %9 ], [ %7, %2 ]
%11 = call i32 @func1(i32 %10)
%12 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @.str, i64 0, i64 0))
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%14 = load i32, i32* %3
%15 = icmp eq i32 %14, 0
br i1 %15, label %16, label %9
16: ; preds = %9, %2
ret i32 0
}