#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 *, char *);
char UserMenu(char *opt) {
  char buffer[100];
  printf("\nOptions:\n\n");
  printf("1) Exit\n");
  printf("2) Make an empty list\n");
  printf("3) Build list using file 'prog04in.dat'\n");
  printf("4) Display the list\n");
  printf("5) Find an item\n");
  printf("6) Insert an item\n");
  printf("7) Delete an item\n");
  printf("8) Save the list in file 'prog04out.dat'\n");
  printf("9) Destroy the list\n");
  printf("\nYour selection: ");
  scanf("%s", buffer);
  *opt = buffer[0];
  return *opt;
}


x86 assembly (clang, -O0):
<UserMenu>:
push   %rbp
mov    %rsp,%rbp
sub    $0x70,%rsp
mov    %rdi,-0x8(%rbp)
lea    0xecd(%rip),%rdi
call   1030 <printf@plt>
lea    0xecd(%rip),%rdi
call   1030 <printf@plt>
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xed5(%rip),%rdi
call   1030 <printf@plt>
lea    0xef2(%rip),%rdi
call   1030 <printf@plt>
lea    0xefb(%rip),%rdi
call   1030 <printf@plt>
lea    0xf00(%rip),%rdi
call   1030 <printf@plt>
lea    0xf07(%rip),%rdi
call   1030 <printf@plt>
lea    0xf0e(%rip),%rdi
call   1030 <printf@plt>
lea    0xf2c(%rip),%rdi
call   1030 <printf@plt>
lea    0xf35(%rip),%rdi
call   1030 <printf@plt>
lea    -0x70(%rbp),%rsi
lea    0xf37(%rip),%rdi
call   1040 <scanf@plt>
mov    -0x70(%rbp),%cl
mov    -0x8(%rbp),%rax
mov    %cl,(%rax)
mov    -0x8(%rbp),%rax
movsbl (%rax),%eax
add    $0x70,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<UserMenu>:
push   %rbx
sub    $0x70,%rsp
mov    %rdi,%rbx
lea    0xed6(%rip),%rdi
call   1030 <puts@plt>
lea    0xed5(%rip),%rdi
call   1030 <puts@plt>
lea    0xed1(%rip),%rdi
call   1030 <puts@plt>
lea    0xedb(%rip),%rdi
call   1030 <puts@plt>
lea    0xef7(%rip),%rdi
call   1030 <puts@plt>
lea    0xeff(%rip),%rdi
call   1030 <puts@plt>
lea    0xf03(%rip),%rdi
call   1030 <puts@plt>
lea    0xf09(%rip),%rdi
call   1030 <puts@plt>
lea    0xf0f(%rip),%rdi
call   1030 <puts@plt>
lea    0xf2c(%rip),%rdi
call   1030 <puts@plt>
lea    0xe49(%rip),%rdi
call   1040 <printf@plt>
lea    0xe4f(%rip),%rdi
mov    %rsp,%rsi
call   1050 <scanf@plt>
mov    (%rsp),%al
mov    %al,(%rbx)
add    $0x70,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [12 x i8] c"\0AOptions:\0A\0A\00"
@.str.1 = [9 x i8] c"1) Exit\0A\00"
@.str.2 = [23 x i8] c"2) Make an empty list\0A\00"
@.str.3 = [41 x i8] c"3) Build list using file 'prog04in.dat'\0A\00"
@.str.4 = [21 x i8] c"4) Display the list\0A\00"
@.str.5 = [17 x i8] c"5) Find an item\0A\00"
@.str.6 = [19 x i8] c"6) Insert an item\0A\00"
@.str.7 = [19 x i8] c"7) Delete an item\0A\00"
@.str.8 = [42 x i8] c"8) Save the list in file 'prog04out.dat'\0A\00"
@.str.9 = [21 x i8] c"9) Destroy the list\0A\00"
@.str.10 = [18 x i8] c"\0AYour selection: \00"
@.str.11 = [3 x i8] c"%s\00"
define signext i8 @UserMenu(i8* %0) {
%2 = alloca i8*
%3 = alloca [100 x i8]
store i8* %0, i8** %2
%4 = call i32 @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.2, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([41 x i8], [41 x i8]* @.str.3, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.4, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.5, i64 0, i64 0))
%10 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.6, i64 0, i64 0))
%11 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.7, i64 0, i64 0))
%12 = call i32 @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str.8, i64 0, i64 0))
%13 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.9, i64 0, i64 0))
%14 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.10, i64 0, i64 0))
%15 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%16 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.11, i64 0, i64 0), i8* %15)
%17 = getelementptr inbounds [100 x i8], [100 x i8]* %3, i64 0, i64 0
%18 = load i8, i8* %17
%19 = load i8*, i8** %2
store i8 %18, i8* %19
%20 = load i8*, i8** %2
%21 = load i8, i8* %20
ret i8 %21
}

LLVM IR (-O2):
@.str.10 = [18 x i8] c"\0AYour selection: \00"
@.str.11 = [3 x i8] c"%s\00"
@str = [11 x i8] c"\0AOptions:\0A\00"
@str.12 = [8 x i8] c"1) Exit\00"
@str.13 = [22 x i8] c"2) Make an empty list\00"
@str.14 = [40 x i8] c"3) Build list using file 'prog04in.dat'\00"
@str.15 = [20 x i8] c"4) Display the list\00"
@str.16 = [16 x i8] c"5) Find an item\00"
@str.17 = [18 x i8] c"6) Insert an item\00"
@str.18 = [18 x i8] c"7) Delete an item\00"
@str.19 = [41 x i8] c"8) Save the list in file 'prog04out.dat'\00"
@str.20 = [20 x i8] c"9) Destroy the list\00"
define signext i8 @UserMenu(i8* nocapture writeonly %0) {
%2 = alloca [100 x i8]
%3 = getelementptr inbounds [100 x i8], [100 x i8]* %2, i64 0, i64 0
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @str, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @str.12, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @str.13, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([40 x i8], [40 x i8]* @str.14, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str.15, i64 0, i64 0))
%9 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @str.16, i64 0, i64 0))
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @str.17, i64 0, i64 0))
%11 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @str.18, i64 0, i64 0))
%12 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([41 x i8], [41 x i8]* @str.19, i64 0, i64 0))
%13 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @str.20, i64 0, i64 0))
%14 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.10, i64 0, i64 0))
%15 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.11, i64 0, i64 0), i8* %3)
%16 = load i8, i8* %3
store i8 %16, i8* %0
ret i8 %16
}