#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*/ del();
int /*<<< orphan*/ disp();
int /*<<< orphan*/ ins();
int /*<<< orphan*/ insl();
int /*<<< orphan*/ printf(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int ch;
  while (1) {
    printf("\nChoices:\n\t1-Insert\n\t2-Insert left\n\t3-Delete "
           "node\n\t4-Display\n\t5-Exit\nEnter your choice: ");
    scanf("%d", &ch);
    switch (ch) {
    case 1:
      ins();
      break;
    case 2:
      insl();
      break;
    case 3:
      del();
      break;
    case 4:
      disp();
      break;
    default:
      return 0;
    }
  }
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
call   1040 <printf@plt>
lea    0xee7(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
mov    -0x8(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x3,%eax
ja     11e4 <main+0x84>
mov    -0x10(%rbp),%rax
lea    0xe55(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
mov    $0x0,%al
call   1030 <ins@plt>
jmp    11ec <main+0x8c>
mov    $0x0,%al
call   1070 <insl@plt>
jmp    11ec <main+0x8c>
mov    $0x0,%al
call   1080 <del@plt>
jmp    11ec <main+0x8c>
mov    $0x0,%al
call   1050 <disp@plt>
jmp    11ec <main+0x8c>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret
jmp    116f <main+0xf>

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xea1(%rip),%r14
lea    0xef3(%rip),%r15
lea    0x4(%rsp),%r12
lea    0xe7e(%rip),%rbx
jmp    1197 <main+0x37>
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
xor    %eax,%eax
call   1050 <disp@plt>
mov    %r14,%rdi
call   1040 <printf@plt>
mov    %r15,%rdi
mov    %r12,%rsi
call   1060 <scanf@plt>
mov    0x4(%rsp),%eax
add    $0xffffffff,%eax
cmp    $0x3,%eax
ja     11e9 <main+0x89>
movslq (%rbx,%rax,4),%rax
add    %rbx,%rax
jmp    *%rax
xor    %eax,%eax
call   1030 <ins@plt>
jmp    1197 <main+0x37>
nopl   0x0(%rax,%rax,1)
xor    %eax,%eax
call   1070 <insl@plt>
jmp    1197 <main+0x37>
nopl   0x0(%rax)
xor    %eax,%eax
call   1080 <del@plt>
jmp    1197 <main+0x37>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [89 x i8] c"\0AChoices:\0A\091-Insert\0A\092-Insert left\0A\093-Delete node\0A\094-Display\0A\095-Exit\0AEnter your choice: \00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
br label %3
3: ; preds = %0, %16
%4 = call i32 @printf(i8* getelementptr inbounds ([89 x i8], [89 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* %2)
%6 = load i32, i32* %2
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 (...) @ins()
br label %16
9: ; preds = %3
%10 = call i32 (...) @insl()
br label %16
11: ; preds = %3
%12 = call i32 (...) @del()
br label %16
13: ; preds = %3
%14 = call i32 (...) @disp()
br label %16
15: ; preds = %3
ret i32 0
16: ; preds = %13, %11, %9, %7
br label %3
}

LLVM IR (-O2):
@.str = [89 x i8] c"\0AChoices:\0A\091-Insert\0A\092-Insert left\0A\093-Delete node\0A\094-Display\0A\095-Exit\0AEnter your choice: \00"
@.str.1 = [3 x i8] c"%d\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
br label %3
3: ; preds = %15, %0
%4 = call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([89 x i8], [89 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 %16 [
i32 1, label %7
i32 2, label %9
i32 3, label %11
i32 4, label %13
]
7: ; preds = %3
%8 = call i32 (...) @ins()
br label %15
9: ; preds = %3
%10 = call i32 (...) @insl()
br label %15
11: ; preds = %3
%12 = call i32 (...) @del()
br label %15
13: ; preds = %3
%14 = call i32 (...) @disp()
br label %15
15: ; preds = %13, %11, %9, %7
br label %3
16: ; preds = %3
ret i32 0
}