#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*/ puts(char *);
int /*<<< orphan*/ scanf(char *, int *);
int menu(void) {
  int reply;
  puts("\nEnter 1 for task A.");
  puts("Enter 2 for task B.");
  puts("Enter 3 for task C.");
  puts("Enter 4 for task D.");
  puts("Enter 5 to exit program.");
  scanf("%d", &reply);
  return reply;
}


x86 assembly (clang, -O0):
<menu>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
call   1030 <puts@plt>
lea    0xeda(%rip),%rdi
call   1030 <puts@plt>
lea    0xee2(%rip),%rdi
call   1030 <puts@plt>
lea    0xeea(%rip),%rdi
call   1030 <puts@plt>
lea    0xef2(%rip),%rdi
call   1030 <puts@plt>
lea    0xeff(%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
lea    0xed8(%rip),%rdi
call   1030 <puts@plt>
lea    0xee1(%rip),%rdi
call   1030 <puts@plt>
lea    0xee9(%rip),%rdi
call   1030 <puts@plt>
lea    0xef1(%rip),%rdi
call   1030 <puts@plt>
lea    0xef9(%rip),%rdi
call   1030 <puts@plt>
lea    0xf06(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x4(%rsp),%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"\0AEnter 1 for task A.\00"
@.str.1 = [20 x i8] c"Enter 2 for task B.\00"
@.str.2 = [20 x i8] c"Enter 3 for task C.\00"
@.str.3 = [20 x i8] c"Enter 4 for task D.\00"
@.str.4 = [25 x i8] c"Enter 5 to exit program.\00"
@.str.5 = [3 x i8] c"%d\00"
define i32 @menu() {
%1 = alloca i32
%2 = call i32 @puts(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @puts(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @puts(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @puts(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @puts(i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str.4, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i32* %1)
%8 = load i32, i32* %1
ret i32 %8
}

LLVM IR (-O2):
@.str = [21 x i8] c"\0AEnter 1 for task A.\00"
@.str.1 = [20 x i8] c"Enter 2 for task B.\00"
@.str.2 = [20 x i8] c"Enter 3 for task C.\00"
@.str.3 = [20 x i8] c"Enter 4 for task D.\00"
@.str.4 = [25 x i8] c"Enter 5 to exit program.\00"
@.str.5 = [3 x i8] c"%d\00"
define i32 @menu() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.3, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @.str.4, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.5, i64 0, i64 0), i32* %1)
%9 = load i32, i32* %1
ret i32 %9
}