#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 *);
main() {
  char a;
  printf("Enter the character : ");
  scanf("%c", &a);
  if (a >= 65 && a <= 90)
    printf("\nIt is an alphabetic character");
  else if (a >= 97 && a <= 122)
    printf("\nIt is an alphabetic character");
  else if (a >= 48 && a <= 57)
    printf("\nIt is a number");
  else
    printf("\nIt is a special character");
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
call   1030 <printf@plt>
lea    0xed5(%rip),%rdi
lea    -0x5(%rbp),%rsi
call   1040 <scanf@plt>
movsbl -0x5(%rbp),%eax
cmp    $0x41,%eax
jl     1176 <main+0x56>
movsbl -0x5(%rbp),%eax
cmp    $0x5a,%eax
jg     1176 <main+0x56>
lea    0xeae(%rip),%rdi
call   1030 <printf@plt>
jmp    11e2 <main+0xc2>
movsbl -0x5(%rbp),%eax
cmp    $0x61,%eax
jl     11a1 <main+0x81>
movsbl -0x5(%rbp),%eax
cmp    $0x7a,%eax
jg     11a1 <main+0x81>
lea    0xe83(%rip),%rdi
call   1030 <printf@plt>
jmp    11dd <main+0xbd>
movsbl -0x5(%rbp),%eax
cmp    $0x30,%eax
jl     11cc <main+0xac>
movsbl -0x5(%rbp),%eax
cmp    $0x39,%eax
jg     11cc <main+0xac>
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
jmp    11d8 <main+0xb8>
lea    0xe76(%rip),%rdi
call   1030 <printf@plt>
jmp    11dd <main+0xbd>
jmp    11e2 <main+0xc2>
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
call   1030 <printf@plt>
lea    0xee3(%rip),%rdi
lea    0x7(%rsp),%rsi
call   1040 <scanf@plt>
mov    0x7(%rsp),%al
mov    %eax,%ecx
and    $0xdf,%cl
add    $0xbf,%cl
add    $0xd0,%al
cmp    $0xa,%al
lea    0xee4(%rip),%rax
lea    0xeed(%rip),%rdx
cmovb  %rax,%rdx
cmp    $0x1a,%cl
lea    0xeb0(%rip),%rdi
cmovae %rdx,%rdi
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [23 x i8] c"Enter the character : \00"
@.str.1 = [3 x i8] c"%c\00"
@.str.2 = [31 x i8] c"\0AIt is an alphabetic character\00"
@.str.3 = [16 x i8] c"\0AIt is a number\00"
@.str.4 = [27 x i8] c"\0AIt is a special character\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
%3 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%4 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %2)
%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 ([31 x i8], [31 x i8]* @.str.2, i64 0, i64 0))
br label %38
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 ([31 x i8], [31 x i8]* @.str.2, i64 0, i64 0))
br label %37
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 ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0))
br label %36
34: ; preds = %28, %24
%35 = call i32 @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.4, i64 0, i64 0))
br label %36
36: ; preds = %34, %32
br label %37
37: ; preds = %36, %22
br label %38
38: ; preds = %37, %12
%39 = load i32, i32* %1
ret i32 %39
}

LLVM IR (-O2):
@.str = [23 x i8] c"Enter the character : \00"
@.str.1 = [3 x i8] c"%c\00"
@.str.2 = [31 x i8] c"\0AIt is an alphabetic character\00"
@.str.3 = [16 x i8] c"\0AIt is a number\00"
@.str.4 = [27 x i8] c"\0AIt is a special character\00"
define i32 @main() {
%1 = alloca i8
%2 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i64 0, i64 0))
%3 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i8* %1)
%4 = load i8, i8* %1
%5 = and i8 %4, -33
%6 = add i8 %5, -65
%7 = icmp ult i8 %6, 26
%8 = add i8 %4, -48
%9 = icmp ult i8 %8, 10
%10 = select i1 %9, i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.4, i64 0, i64 0)
%11 = select i1 %7, i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.2, i64 0, i64 0), i8* %10
%12 = call i32 @printf(i8* dereferenceable(1) %11)
ret i32 0
}