#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);
int main() {
  char ch = '\0';
  scanf("%c", ch);
  if (ch >= 'A' && ch <= 'Z') {
    printf("Capital Letter");
  } else if (ch >= 'a' && ch <= 'z') {
    printf("Small Letter");
  } else if (ch >= '0' && ch <= '9') {
    printf("Digit");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movb   $0x0,-0x5(%rbp)
lea    0xec6(%rip),%rdi
movsbl -0x5(%rbp),%esi
call   1040 <scanf@plt>
movsbl -0x5(%rbp),%eax
cmp    $0x41,%eax
jl     116e <main+0x4e>
movsbl -0x5(%rbp),%eax
cmp    $0x5a,%eax
jg     116e <main+0x4e>
lea    0xe9f(%rip),%rdi
call   1030 <printf@plt>
jmp    11c9 <main+0xa9>
movsbl -0x5(%rbp),%eax
cmp    $0x61,%eax
jl     1199 <main+0x79>
movsbl -0x5(%rbp),%eax
cmp    $0x7a,%eax
jg     1199 <main+0x79>
lea    0xe83(%rip),%rdi
call   1030 <printf@plt>
jmp    11c4 <main+0xa4>
movsbl -0x5(%rbp),%eax
cmp    $0x30,%eax
jl     11bf <main+0x9f>
movsbl -0x5(%rbp),%eax
cmp    $0x39,%eax
jg     11bf <main+0x9f>
lea    0xe65(%rip),%rdi
call   1030 <printf@plt>
jmp    11c4 <main+0xa4>
jmp    11c9 <main+0xa9>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xee8(%rip),%rdi
xor    %esi,%esi
call   1030 <scanf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [3 x i8] c"%c\00"
@.str.1 = [15 x i8] c"Capital Letter\00"
@.str.2 = [13 x i8] c"Small Letter\00"
@.str.3 = [6 x i8] c"Digit\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
store i8 0, i8* %2
%3 = load i8, i8* %2
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 signext %3)
%5 = load i8, i8* %2
%6 = sext i8 %5 to i32
%7 = icmp sge i32 %6, 65
br i1 %7, label %8, label %14
8: ; preds = %0
%9 = load i8, i8* %2
%10 = sext i8 %9 to i32
%11 = icmp sle i32 %10, 90
br i1 %11, label %12, label %14
12: ; preds = %8
%13 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.1, i64 0, i64 0))
br label %36
14: ; preds = %8, %0
%15 = load i8, i8* %2
%16 = sext i8 %15 to i32
%17 = icmp sge i32 %16, 97
br i1 %17, label %18, label %24
18: ; preds = %14
%19 = load i8, i8* %2
%20 = sext i8 %19 to i32
%21 = icmp sle i32 %20, 122
br i1 %21, label %22, label %24
22: ; preds = %18
%23 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.2, i64 0, i64 0))
br label %35
24: ; preds = %18, %14
%25 = load i8, i8* %2
%26 = sext i8 %25 to i32
%27 = icmp sge i32 %26, 48
br i1 %27, label %28, label %34
28: ; preds = %24
%29 = load i8, i8* %2
%30 = sext i8 %29 to i32
%31 = icmp sle i32 %30, 57
br i1 %31, label %32, label %34
32: ; preds = %28
%33 = call i32 @printf(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0))
br label %34
34: ; preds = %32, %28, %24
br label %35
35: ; preds = %34, %22
br label %36
36: ; preds = %35, %12
ret i32 0
}

LLVM IR (-O2):
@.str = [3 x i8] c"%c\00"
define i32 @main() {
%1 = tail call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0), i8 signext 0)
ret i32 0
}