#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 Get_command(void) {
  char c;
  printf("###########################################\n");
  printf("#\tPlease enter a command:           #\n");
  printf("#\t1.     u = union.                 #\n");
  printf("#\t2.     i = intersection.          #\n");
  printf("#\t3.     d = difference.            #\n");
  printf("#\t4.     q = quit.                  #\n");
  printf("###########################################\n");
  printf("$ ");
  scanf(" %c", &c);
  return c;
}


x86 assembly (clang, -O0):
<Get_command>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
lea    0xed1(%rip),%rdi
call   1030 <printf@plt>
lea    0xef2(%rip),%rdi
call   1030 <printf@plt>
lea    0xf0d(%rip),%rdi
call   1030 <printf@plt>
lea    0xf28(%rip),%rdi
call   1030 <printf@plt>
lea    0xf43(%rip),%rdi
call   1030 <printf@plt>
lea    0xf5e(%rip),%rdi
call   1030 <printf@plt>
lea    0xe89(%rip),%rdi
call   1030 <printf@plt>
lea    0xf6d(%rip),%rdi
call   1030 <printf@plt>
lea    0xf64(%rip),%rdi
lea    -0x1(%rbp),%rsi
call   1040 <scanf@plt>
movsbl -0x1(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<Get_command>:
push   %rbx
sub    $0x10,%rsp
lea    0xf89(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
call   1030 <puts@plt>
lea    0xed6(%rip),%rdi
call   1030 <puts@plt>
lea    0xef0(%rip),%rdi
call   1030 <puts@plt>
lea    0xf0a(%rip),%rdi
call   1030 <puts@plt>
lea    0xf24(%rip),%rdi
call   1030 <puts@plt>
mov    %rbx,%rdi
call   1030 <puts@plt>
lea    0xe71(%rip),%rdi
call   1040 <printf@plt>
lea    0xe68(%rip),%rdi
lea    0xf(%rsp),%rsi
call   1050 <scanf@plt>
mov    0xf(%rsp),%al
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [45 x i8] c"###########################################\0A\00"
@.str.1 = [39 x i8] c"#\09Please enter a command: #\0A\00"
@.str.2 = [39 x i8] c"#\091. u = union. #\0A\00"
@.str.3 = [39 x i8] c"#\092. i = intersection. #\0A\00"
@.str.4 = [39 x i8] c"#\093. d = difference. #\0A\00"
@.str.5 = [39 x i8] c"#\094. q = quit. #\0A\00"
@.str.6 = [3 x i8] c"$ \00"
@.str.7 = [4 x i8] c" %c\00"
define signext i8 @Get_command() {
%1 = alloca i8
%2 = call i32 @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.1, i64 0, i64 0))
%4 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.2, i64 0, i64 0))
%5 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.3, i64 0, i64 0))
%6 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.4, i64 0, i64 0))
%7 = call i32 @printf(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.5, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([45 x i8], [45 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @printf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.6, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i8* %1)
%11 = load i8, i8* %1
ret i8 %11
}

LLVM IR (-O2):
@.str.6 = [3 x i8] c"$ \00"
@.str.7 = [4 x i8] c" %c\00"
@str.8 = [38 x i8] c"#\09Please enter a command: #\00"
@str.9 = [38 x i8] c"#\091. u = union. #\00"
@str.10 = [38 x i8] c"#\092. i = intersection. #\00"
@str.11 = [38 x i8] c"#\093. d = difference. #\00"
@str.12 = [38 x i8] c"#\094. q = quit. #\00"
@str.13 = [44 x i8] c"###########################################\00"
define signext i8 @Get_command() {
%1 = alloca i8
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([44 x i8], [44 x i8]* @str.13, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.8, i64 0, i64 0))
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.9, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.10, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.11, i64 0, i64 0))
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([38 x i8], [38 x i8]* @str.12, i64 0, i64 0))
%8 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([44 x i8], [44 x i8]* @str.13, i64 0, i64 0))
%9 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([3 x i8], [3 x i8]* @.str.6, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.7, i64 0, i64 0), i8* %1)
%11 = load i8, i8* %1
ret i8 %11
}