#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;
  printf("please input a char:\n");
  scanf("%c", &ch);
  if (ch >= 'a' && ch <= 'z')
    printf("char(%c)", ch - 32);
  else
    printf("char(%c)", ch);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed2(%rip),%rdi
lea    -0x5(%rbp),%rsi
call   1040 <scanf@plt>
movsbl -0x5(%rbp),%eax
cmp    $0x61,%eax
jl     1181 <main+0x61>
movsbl -0x5(%rbp),%eax
cmp    $0x7a,%eax
jg     1181 <main+0x61>
movsbl -0x5(%rbp),%esi
sub    $0x20,%esi
lea    0xea4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1193 <main+0x73>
movsbl -0x5(%rbp),%esi
lea    0xe8d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed4(%rip),%rdi
call   1030 <puts@plt>
lea    0xebc(%rip),%rdi
lea    0x7(%rsp),%rsi
call   1050 <scanf@plt>
movsbl 0x7(%rsp),%eax
lea    -0x61(%rax),%ecx
lea    -0x20(%rax),%esi
cmp    $0x1a,%cl
cmovae %eax,%esi
lea    0xe9d(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [22 x i8] c"please input a char:\0A\00"
@.str.1 = [3 x i8] c"%c\00"
@.str.2 = [9 x i8] c"char(%c)\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i8
store i32 0, i32* %1
%3 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 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, 97
br i1 %7, label %8, label %17
8: ; preds = %0
%9 = load i8, i8* %2
%10 = sext i8 %9 to i32
%11 = icmp sle i32 %10, 122
br i1 %11, label %12, label %17
12: ; preds = %8
%13 = load i8, i8* %2
%14 = sext i8 %13 to i32
%15 = sub nsw i32 %14, 32
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %15)
br label %21
17: ; preds = %8, %0
%18 = load i8, i8* %2
%19 = sext i8 %18 to i32
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %19)
br label %21
21: ; preds = %17, %12
ret i32 0
}

LLVM IR (-O2):
@.str.1 = [3 x i8] c"%c\00"
@.str.2 = [9 x i8] c"char(%c)\00"
@str = [21 x i8] c"please input a char:\00"
define i32 @main() {
%1 = alloca i8
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 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 = sext i8 %4 to i32
%6 = add i8 %4, -97
%7 = icmp ult i8 %6, 26
%8 = add nsw i32 %5, -32
%9 = select i1 %7, i32 %8, i32 %5
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), i32 %9)
ret i32 0
}