#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 /*<<< orphan*/ scanf(char *, int *);
int menu() {
  int ch;
  printf("\n");
  printf("0) Exit\n");
  printf("1) Append\n");
  printf("2) Display\n");
  printf("3) Insert\n");
  printf("4) Delete\n");
  printf("5) Reverse\n");
  printf("6) Reverse recursion\n");
  printf("Enter your choice: ");
  scanf("%d", &ch);
  return ch;
}


x86 assembly (clang, -O0):
<menu>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xee3(%rip),%rdi
call   1030 <printf@plt>
lea    0xec5(%rip),%rdi
call   1030 <printf@plt>
lea    0xec2(%rip),%rdi
call   1030 <printf@plt>
lea    0xec1(%rip),%rdi
call   1030 <printf@plt>
lea    0xec1(%rip),%rdi
call   1030 <printf@plt>
lea    0xec0(%rip),%rdi
call   1030 <printf@plt>
lea    0xebf(%rip),%rdi
call   1030 <printf@plt>
lea    0xebf(%rip),%rdi
call   1030 <printf@plt>
lea    0xec9(%rip),%rdi
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    -0x4(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<menu>:
push   %rax
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xec5(%rip),%rdi
call   1040 <puts@plt>
lea    0xec1(%rip),%rdi
call   1040 <puts@plt>
lea    0xebf(%rip),%rdi
call   1040 <puts@plt>
lea    0xebe(%rip),%rdi
call   1040 <puts@plt>
lea    0xebc(%rip),%rdi
call   1040 <puts@plt>
lea    0xeba(%rip),%rdi
call   1040 <puts@plt>
lea    0xeb9(%rip),%rdi
call   1040 <puts@plt>
lea    0xe5a(%rip),%rdi
call   1050 <printf@plt>
lea    0xe62(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1060 <scanf@plt>
mov    0x4(%rsp),%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [2 x i8] c"\0A\00"
@.str.1 = [9 x i8] c"0) Exit\0A\00"
@.str.2 = [11 x i8] c"1) Append\0A\00"
@.str.3 = [12 x i8] c"2) Display\0A\00"
@.str.4 = [11 x i8] c"3) Insert\0A\00"
@.str.5 = [11 x i8] c"4) Delete\0A\00"
@.str.6 = [12 x i8] c"5) Reverse\0A\00"
@.str.7 = [22 x i8] c"6) Reverse recursion\0A\00"
@.str.8 = [20 x i8] c"Enter your choice: \00"
@.str.9 = [3 x i8] c"%d\00"
define i32 @menu() {
%1 = alloca i32
%2 = call i32 @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.5, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.6, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.7, i64 0, i64 0))
%10 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.8, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.9, i64 0, i64 0), i32* %1)
%12 = load i32, i32* %1
ret i32 %12
}

LLVM IR (-O2):
@.str.8 = [20 x i8] c"Enter your choice: \00"
@.str.9 = [3 x i8] c"%d\00"
@str = [8 x i8] c"0) Exit\00"
@str.10 = [10 x i8] c"1) Append\00"
@str.11 = [11 x i8] c"2) Display\00"
@str.12 = [10 x i8] c"3) Insert\00"
@str.13 = [10 x i8] c"4) Delete\00"
@str.14 = [11 x i8] c"5) Reverse\00"
@str.15 = [21 x i8] c"6) Reverse recursion\00"
define i32 @menu() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @putchar(i32 10)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @str, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str.10, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str.11, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str.12, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str.13, i64 0, i64 0))
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str.14, i64 0, i64 0))
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.15, i64 0, i64 0))
%11 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.8, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.9, i64 0, i64 0), i32* %1)
%13 = load i32, i32* %1
ret i32 %13
}