#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*/ delete ();
int /*<<< orphan*/ display();
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ insert();
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, int *);
void main() {
  int n;
  while (1) {
    printf("1. Add a number to the list\n2. Delete a number from the list\n3. "
           "View list\n4. Exit\n");
    scanf("%d", &n);
    switch (n) {
    case 1:
      insert();
      break;
    case 2:
      delete ();
      break;
    case 3:
      display();
      break;
    case 4:
      exit(0);
      break;
    default:
      printf("invalid");
    }
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xea1(%rip),%rdi
call   1040 <printf@plt>
lea    0xee8(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1050 <scanf@plt>
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x3,%eax
ja     11d8 <main+0x78>
mov    -0x10(%rbp),%rax
lea    0xe5c(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
mov    $0x0,%al
call   1060 <insert@plt>
jmp    11e4 <main+0x84>
mov    $0x0,%al
call   1070 <delete@plt>
jmp    11e4 <main+0x84>
mov    $0x0,%al
call   1030 <display@plt>
jmp    11e4 <main+0x84>
xor    %edi,%edi
call   1080 <exit@plt>
lea    0xe87(%rip),%rdi
call   1040 <printf@plt>
jmp    1168 <main+0x8>

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x10,%rsp
lea    0xe97(%rip),%r14
lea    0xe85(%rip),%r15
lea    0xc(%rsp),%r13
lea    0xe7c(%rip),%r12
lea    0xe62(%rip),%rbx
jmp    11a7 <main+0x37>
xor    %eax,%eax
call   1040 <display@plt>
mov    %r14,%rdi
call   1030 <puts@plt>
mov    %r15,%rdi
mov    %r13,%rsi
call   1060 <scanf@plt>
mov    0xc(%rsp),%eax
add    $0xffffffff,%eax
cmp    $0x3,%eax
ja     11e0 <main+0x70>
movslq (%rbx,%rax,4),%rax
add    %rbx,%rax
jmp    *%rax
xor    %eax,%eax
call   1070 <insert@plt>
jmp    11a7 <main+0x37>
nopl   0x0(%rax,%rax,1)
mov    %r12,%rdi
call   1050 <printf@plt>
jmp    11a7 <main+0x37>
nopw   0x0(%rax,%rax,1)
xor    %eax,%eax
call   1080 <delete@plt>
jmp    11a7 <main+0x37>
xor    %edi,%edi
call   1090 <exit@plt>

LLVM IR (-O0):
@.str = [83 x i8] c"1. Add a number to the list\0A2. Delete a number from the list\0A3. View list\0A4. Exit\0A\00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [8 x i8] c"invalid\00"
define void @main() {
%1 = alloca i32
br label %2
2: ; preds = %0, %16
%3 = call i32 @printf(i8* getelementptr inbounds ([83 x i8], [83 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
switch i32 %5, label %14 [
i32 1, label %6
i32 2, label %8
i32 3, label %10
i32 4, label %12
]
6: ; preds = %2
%7 = call i32 (...) @insert()
br label %16
8: ; preds = %2
%9 = call i32 (...) @delete()
br label %16
10: ; preds = %2
%11 = call i32 (...) @display()
br label %16
12: ; preds = %2
%13 = call i32 @exit(i32 0)
unreachable
14: ; preds = %2
%15 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0))
br label %16
16: ; preds = %14, %10, %8, %6
br label %2
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [8 x i8] c"invalid\00"
@str = [82 x i8] c"1. Add a number to the list\0A2. Delete a number from the list\0A3. View list\0A4. Exit\00"
define void @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %17, %0
%4 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([82 x i8], [82 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 = load i32, i32* %1
switch i32 %6, label %15 [
i32 1, label %7
i32 2, label %9
i32 3, label %11
i32 4, label %13
]
7: ; preds = %3
%8 = call i32 (...) @insert()
br label %17
9: ; preds = %3
%10 = call i32 (...) @delete()
br label %17
11: ; preds = %3
%12 = call i32 (...) @display()
br label %17
13: ; preds = %3
%14 = call i32 @exit(i32 0)
unreachable
15: ; preds = %3
%16 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @.str.2, i64 0, i64 0))
br label %17
17: ; preds = %15, %11, %9, %7
br label %3
}